CN117966617A - A jacking construction method and device for a frame bridge under a railway - Google Patents
A jacking construction method and device for a frame bridge under a railway Download PDFInfo
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- CN117966617A CN117966617A CN202410318400.0A CN202410318400A CN117966617A CN 117966617 A CN117966617 A CN 117966617A CN 202410318400 A CN202410318400 A CN 202410318400A CN 117966617 A CN117966617 A CN 117966617A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
本发明涉及下穿铁路框构桥的顶进施工领域，主要是涉及一种下穿铁路框构桥顶进施工方法，其具体包括以下步骤：S1、施工准备工作；S2、拆除轨枕墙、声屏障；S3、应力放散；S4、轨束梁施工；S5、横抬梁施工；S6、线路加固；S7、挖取工作坑；S8、预制框构桥；S9、顶进框构桥；S10、线路恢复。本发明通过预制框构桥，然后试顶进框构桥后再对框构桥进行分次顶进，直至框构桥顶进施工完成，分次顶进不仅有利于提高框构桥的顶进速度和效率，同时还使得施工人员能够控制框构桥的顶进精度和在框构桥出现偏差时及时进行纠偏，该框构桥顶进施工方法不仅降低了框构桥顶进施工误差，而且提高了框构桥顶进施工精度，同时降低框构桥顶进施工的总成本投入。
The present invention relates to the field of jacking construction of underpass railway frame bridges, and mainly to a jacking construction method of underpass railway frame bridges, which specifically includes the following steps: S1, construction preparation; S2, removal of sleeper walls and sound barriers; S3, stress release; S4, rail beam construction; S5, horizontal beam construction; S6, line reinforcement; S7, digging a working pit; S8, prefabricating a frame bridge; S9, jacking the frame bridge; S10, line recovery. The present invention prefabricates a frame bridge, then tries to jack the frame bridge, and then jacks the frame bridge in stages until the jacking construction of the frame bridge is completed. The jacking in stages is not only conducive to improving the jacking speed and efficiency of the frame bridge, but also enables construction personnel to control the jacking accuracy of the frame bridge and correct the deviation in time when the frame bridge deviates. The frame bridge jacking construction method not only reduces the jacking construction error of the frame bridge, but also improves the jacking construction accuracy of the frame bridge, and reduces the total cost investment of the jacking construction of the frame bridge.
Description
Technical Field
The invention relates to the field of jacking construction of a frame bridge of a downward-penetrating railway, in particular to a jacking construction method and device of a frame bridge of a downward-penetrating railway.
Background
Along with the rapid development of high-speed railways in China in recent years, a complex railway traffic network is formed by shuttling railway lines between cities, and a railway and a highway form a level crossing, so that the railway level crossing is cancelled successively due to the fact that frequent accidents of the level crossing form a great hidden danger for railway driving safety, the construction cost of the upper-span overpass or the lower-pass frame bridge is relatively high, the construction cost of the lower-pass frame bridge is relatively low, the total investment is further reduced under the condition of improving the construction process, and in order to reduce cost and efficiency, reduce the error of frame bridge jacking construction, ensure the safety and stability of frame bridge jacking construction and reduce the total investment.
Disclosure of Invention
In order to reduce the jacking construction error of a frame bridge and improve the jacking construction precision of the frame bridge and reduce the total cost investment of the jacking construction of the frame bridge at the same time, the invention provides a jacking construction method of a downward railway frame bridge.
In a first aspect, the invention provides a construction method for jacking a frame bridge of a downward railway, which adopts the following technical scheme:
A jacking construction method of a underpass railway frame bridge comprises the following steps:
s1, construction preparation work;
s2, removing sleeper walls and sound barriers;
S3, stress relief;
S4, constructing a rail Shu Liang;
s5, transverse beam lifting construction;
S6, line reinforcement;
s7, digging a working pit;
s8, prefabricating a frame bridge;
The process flow of prefabricating the frame bridge comprises the following steps: reinforcing steel bar processing and installation, construction of a frame bridge bottom plate, construction of a frame bridge side wall and a top plate, and earthing of a waterproof layer, a protective layer and a back pile;
S9, jacking a frame bridge;
Jacking frame bridge concrete to 100% strength, and jacking the frame bridge after the longitudinal and transverse I-shaped steel beams are completed, wherein grouting reinforcement is needed to be carried out on the railway roadbed before jacking;
s91, roof test;
after all hydraulic systems are installed, testing the test roof after normal operation;
The jacking force is 1.2 times of the self weight of the structure, the jacking pick is pressurized step by step, the equipment sliding plate and the frame structure are checked after each pressurization, and the equipment sliding plate and the frame structure suddenly descend in the pressurization process, which indicates that the frame starts to slide and continues jacking;
S92, jacking;
Installing a jack, a jacking control console and an oil pump; the axes of the jacking iron and the jack are consistent with the jacking operation direction and are perpendicular to the distribution beam, and the jacking jack condition is observed in jacking;
In the jacking process, chiseling the front support pile for 3 times, wherein the chiseling position of the pile foundation is 10cm below the bottom plate of the frame bridge, and chiseling and conveying out of a working pit in sections; along with jacking construction, mortar steel pipes with the diameter of 10cm, 100I-steel and height-adjusting steel plates are gradually arranged between the cross beams and the top surface of the frame bridge;
When the steel blade angle of the frame bridge is jacked to a position 50cm close to the front surface of the supporting pile, the foundation protecting pile of the jacking surface of the frame bridge is chiseled off, the supporting pile is jacked to the center of the line, and the supporting pile is blocked pointing chisel for the second time; repeatedly jacking to the outer roadbed protection piles, and blocking and chiseling the protection piles for the third time; continuously jacking until the steel blade angle reaches the outer anti-slide pile, removing the steel blade angle, and jacking the frame bridge to the designed position;
S10, line recovery.
Preferably, the step S1 includes the steps of:
S11, preparing a technology;
S12, preparing materials;
s13, preparing a machine tool;
S14, preparing operation conditions.
Preferably, the step S3 includes the steps of:
preparing construction, removing fasteners, placing rollers, measuring rail temperature, judging whether the rail temperature is in a locking rail temperature range, adopting a roller method to release stress when the rail temperature is in the locking rail temperature range, adopting a stretching method to release stress when the rail temperature is not in the locking rail temperature range, striking the rail to release stress, uniformly releasing stress, removing the rollers, falling the steel rail, tightening the fastener and locking a line.
Preferably, the step S4 includes the steps of:
before the track beam construction, the sleeper in the reinforcing range of the transverse lifting beam is replaced by a wooden sleeper by utilizing a sealing lock;
Each wood sleeper is nailed by P60 iron pad spikes, and tamping and supplementing ballast are performed in time after the replacement is finished; the length of each line of the replaced wooden sleeper is not smaller than 21m outside the newly-built frame bridge side wall; the U-shaped bolt for buckling the rail is penetrated and laid down along with the sleeper and cannot be higher than the rail surface of the main rail;
The hanging rail beam adopts a 43kg/m steel rail, and the assembling mode is 3-5-5-3 buckling rails; the outer sides of the two rails are provided with 1+2 buckling rails, the inner sides of the rails are provided with 2+3 buckling rails, the buckling rails are provided with two lengths of 12.5m and 6.25m in a staggered manner, so that joints are staggered, the joints of the rails are staggered by more than 1.0m, the two ends of the joints are flush with the longitudinal beams, and a temporary shuttle head is additionally arranged; the hanging pillow and the sleeper below the hanging pillow are connected together by a U-shaped bolt and angle steel to strengthen the integrity of the hanging pillow, and a track gauge rod is arranged every 2.5 m;
the fastener uses U-shaped bolt and steel buckle plate to use in combination.
Preferably, the step S5 includes the steps of:
The method comprises the steps of (1) installing a transverse lifting beam after the completion of a roadbed protection pile crown beam and a support crown beam, and constructing the transverse lifting beam;
The cross beam adopts I56b I-steel, one end of the cross beam is supported on the top of the frame top plate, the other end of the cross beam is supported on the top crown beam of the protective pile at the uplink line side, and the middle of the cross beam is a supporting crown beam;
The cross beams are bound below the sleepers, the distance between the cross beams is not more than 0.6m, and the suspended length of the cross beams is not more than 8m; the beam is firmly connected with the hanger rail and the sleeper by adopting a bolt with the diameter of 22U; immediately tamping and compacting the ballast under each beam after installing the beam;
the longitudinal beams are arranged on the cross beams in a double-root one-beam way by adopting I56b I-steel; is positioned at the 2.1m position on the two sides of the line and is connected with the cross beam by a U-shaped bolt.
Preferably, the step S6 includes the steps of:
the line reinforcement comprises the arrangement of a protection pile, a crown beam, a support pile and an anti-moving pile;
Protection stake and crown beam: roadbed protection piles are arranged at two sides of a railway line roadbed, the longer the pile length of the side of the excavated earth is, the shorter the pile length of the side of the construction of the side of the bridge is, the crown beam connection is arranged at the top of the roadbed protection pile, and the roadbed protection pile and the crown beam are of reinforced concrete structures;
And (3) supporting piles: the frame bridge line reinforcement method adopts a transverse lifting beam reinforcement method, and support piles are required to be arranged between the instant wire railway lines and road shoulders before transverse lifting Liang Gongzi steel is penetrated, so that the support bearing capacity of the reinforced transverse lifting beam structure meets the requirements, and the stability of the transverse lifting beam structure and the normal running safety of a railway are ensured; the arrangement forms of the support pile steel bars and the concrete are consistent with those of the roadbed protective piles, and the support piles are manually broken in the jacking construction process of the frame bridge;
And (3) pile movement resistance: when the frame bridge jacking construction is performed, the railway line change is caused to influence driving in order to prevent the transverse lifting Liang Gongzi steel displacement caused by the jacking thrust in the jacking process; arranging anti-moving piles and steel Liang Gongzi for crown beam fixing and transverse lifting outside the roadbed in front of the jack-in pit; an L-shaped crown beam is arranged at the pile top of the anti-moving pile, an embedded steel plate is arranged at the position of a transverse lifting beam mounting beam on the top surface of the crown beam, and the transverse lifting beam is welded after the mounting of the transverse beam I-steel is finished, so that the transverse beam I-steel is prevented from moving during the jacking construction of the frame bridge; the arrangement mode of the anti-displacement pile reinforced bars and the concrete is consistent with that of the roadbed protection piles;
back pile: the back pile is arranged at one side of the working pit which is 10 meters away from the railway, the pile foundation construction uses a rotary drilling rig to form holes, the underwater concrete pouring pile forming construction is carried out, and the construction method is consistent with the construction method of the roadbed protection pile foundation.
Preferably, the step S7 includes the steps of:
The back piles and the protection piles are constructed simultaneously, 14 back piles are arranged in each working pit, the pile diameter is 1.25, the pile length is 9m, and the pile spacing is 1.35m; the guard piles are provided with crown beams, the width of each crown beam is 1.5m, the height of each crown beam is 1.2m, and the length of each crown beam is 2.057m;
The working pit is excavated by adopting manual work matched with an excavator, and the earthwork is transported by an automobile; the working pit is excavated according to the design mileage, the structural dimension center line and the elevation of the frame bridge; reserving a surplus amount of 10-30cm away from the bottom of a working pit during excavation of an excavator, and leveling by manual bottom cleaning; constructing temporary drainage ditches and water collecting wells for pumping water by a water pump at two sides of the foundation pit bottom while cleaning the foundation pit so as to immediately pump out accumulated water in the pit and enable the working pit to be in a dry state; a soil water retaining dike with the bottom width of 0.4m, the upper width of 0.2m and the height of 0.3m is built around the outer edge of the working pit so as to prevent rainwater from being poured into the working pit; digging a drainage ditch at the periphery of the working pit, and arranging drainage of a water accumulation pit, and providing water pumping equipment and personnel;
And (3) construction of a sliding plate: the slide plate is made of C30 reinforced concrete with the thickness of 20cm, a ground anchor beam is arranged below the slide plate, and guide piers are arranged on two sides of the slide plate; before the construction of a working slide plate, tamping the bottom of a foundation pit, paving a 20cm broken stone cushion layer, and pouring the slide plate and a ground anchor beam together;
The working slide plate is manufactured by controlling the surface evenness of the concrete, keeping the evenness within 5mm, connecting the slide plate steel bars and the back pile steel bars into a whole, and casting and forming at one time; the center line of the working slide plate is consistent with the center line of the frame bridge; the front end of the sliding plate is 50cm longer than the frame wall body, the rear end of the sliding plate is 200cm longer than the frame wall body, and the two sides of the sliding plate are 35cm wider than the culvert body.
Preferably, the step S10 includes the steps of:
S101, backfilling railway ballast;
The railway ballast is transported by adopting an automobile, a loader is matched with a collision car, the railway ballast is transported to a construction site by utilizing a road and a construction passageway along the road, and before the railway ballast is transported, the quality and the quantity of the railway ballast are checked and confirmed by personnel in a material part before the railway ballast is transported, and records are made; tarpaulin covering is carried out on the stone ballast during the transportation process, so that the stone ballast is prevented from being polluted;
the method is characterized in that the ballast is mechanically matched with manual backfill, a manual tamping machine is used for tamping, the aspect of the longitudinal and transverse gradient, the width, the thickness, the middle groove and other appearance of the backfill-finished ballast surface are required to meet the design regulation requirements, the tool is used for checking the flatness of the ballast surface, and the curve section is never allowed to be reversely ultrahigh;
s102, disassembling a longitudinal beam;
the crane is matched with manpower to carry out the construction of dismantling the longitudinal beam; because the upper transverse lifting beam and the lower transverse lifting beam of the frame structure are padded by the skids, after the U-shaped bolts of the longitudinal beams are loosened, the circuit on the frame structure cannot be subjected to sinking change; however, the filling sections on the two sides of the frame structure are large in ballast backfill thickness, so that the circuit is easy to sink greatly, and a vibration tamping machine is used for reinforcing tamping after the U-shaped bolts of the longitudinal beams are loosened;
Removing splice plates or side welding plates, separating each I-steel sheet in the longitudinal beam bundle sheet by using a rack press in advance, and filling with a spacer to reserve an operation space; removing one piece and then carrying out the next piece;
s103, disassembling the rail beam;
Mechanically matching with manual construction; the dismantling sequence is that the center of the line is firstly dismantled and then the two sides of the line are completely dismantled, and the line is comprehensively lifted and tamping is carried out for 2 times by using a vibration tamping machine, so that the stability of the line is ensured;
s104, drawing a transverse lifting beam;
The transverse lifting beams are extracted from one end of the line reinforcement section to the other end of the line reinforcement section, and six transverse lifting beams are removed every day; before the transverse lifting beam is pulled out, the wooden wedge on the transverse lifting beam is pulled out, so that the pulling-out resistance of the transverse lifting beam is reduced, and the U-shaped bolt of the rail buckling beam is conveniently pulled out;
the drawing-out transverse lifting beam can use a traction machine which can be composed of 1 or 2 loaders or excavators;
backfilling ballast and tamping after each piece of transverse lifting beam is pulled out; when the ballast is lacking or the tamping is not kept, the transverse lifting beam is stopped to be pulled out; after all the pumping is finished, the track is comprehensively lifted by a vibration tamping machine and tamping is carried out for 2 times;
s105, sleeper replacement is performed;
the sleeper is manually replaced, the wooden sleeper is replaced by the concrete sleeper through mechanical cooperation, the wooden sleeper is replaced by the concrete sleeper, and the wooden sleeper is identical to the concrete sleeper and is required according to a design drawing.
Preferably, the step S10 further includes the steps of:
s106, recovering the sleeper wall and the sound barrier, and recovering the formal train operation of the railway line after the construction of the frame bridge is completed.
In a second aspect, the invention provides a jacking device for a frame construction bridge of a downward passing railway, which adopts the following technical scheme:
The utility model provides a bridge jacking device is constructed to railway frame of crossing down, its is applied to a railway frame bridge jacking construction method of crossing down that just described, includes:
The frame structure bridge and the back pile;
The carbon fiber lubricating plate is arranged at the bottom of the frame bridge and is used for bearing the frame bridge and providing a sliding base for the frame bridge;
the jacking oil cylinder is arranged on the carbon fiber lubricating plate;
the force transfer beam is positioned between the cylinder body of the jacking oil cylinder and the back beam, and two ends of the force transfer beam are fixedly connected with the cylinder body of the jacking oil cylinder and the back beam respectively;
The first distribution beam is positioned between the frame bridge and the jacking oil cylinder, and two ends of the first distribution beam are fixedly connected with the telescopic rods of the frame bridge and the jacking oil cylinder respectively;
The second distribution beam is positioned between the jacking oil cylinder and the force transfer beam, and two ends of the second distribution beam are fixedly connected with the cylinder body of the jacking oil cylinder and the force transfer beam respectively;
the third distribution beam is positioned between the force transfer beam and the back beam, and two ends of the third distribution beam are fixedly connected with the force transfer beam and the back beam respectively;
The sliding bracket is arranged at the bottom of the cylinder body of the jacking cylinder; and
The sliding roller is rotationally connected to the sliding support, and the bottom is positioned on the carbon fiber lubricating plate.
In summary, the invention has the following beneficial technical effects:
1. According to the method, the frame bridge is prefabricated, then the frame bridge is subjected to jacking in a trial mode, and then the frame bridge is subjected to jacking in a separated mode until jacking construction of the frame bridge is completed, the jacking speed and efficiency of the frame bridge are improved through the jacking in a separated mode, meanwhile, constructors can control jacking accuracy of the frame bridge and correct deviation when deviation occurs to the frame bridge, the jacking construction method of the frame bridge not only reduces jacking construction errors of the frame bridge, but also improves jacking construction accuracy of the frame bridge, and meanwhile total cost investment of jacking construction of the frame bridge is reduced.
2. According to the invention, the sleeper wall and the sound barrier are removed and stress is released before jacking construction of the frame bridge, so that enough construction space is vacated, and subsequent construction is facilitated for constructors.
3. The invention improves the safety and stability of vehicles passing through by carrying out line reinforcement.
4. By jacking the frame bridge in multiple times, the invention reduces errors in the jacking process of the frame bridge, is convenient for constructors to correct the deviation in time, and improves the construction precision of the frame bridge after the jacking construction is completed.
Drawings
FIG. 1 is a flow chart of a construction method of an embodiment of the present invention;
FIG. 2 is a construction plan view of a construction method according to an embodiment of the present invention;
FIG. 3 is a layout of a cross-beam support pile and a guard pile according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a cross-beam reinforcement of a construction method according to an embodiment of the present invention;
FIG. 5 is a cross-beam reinforcement longitudinal section of a construction method according to an embodiment of the present invention;
FIG. 6 is a layout of a guard pile of a construction method according to an embodiment of the present invention;
FIG. 7 is a plan view of a crown beam construction of a construction method of an embodiment of the present invention;
FIG. 8 is a block diagram of an anti-displacement pile of a construction method according to an embodiment of the present invention;
FIG. 9 is a schematic top-in construction of a construction method according to an embodiment of the present invention;
fig. 10 is a first block chisel support pile of the construction method of the embodiment of the invention;
FIG. 11 is a second block chisel support pile of the construction method of an embodiment of the invention;
fig. 12 is a third blocking chisel support pile of the construction method of the embodiment of the invention;
FIG. 13 is a dismantling steel blade angle of the construction method of the embodiment of the present invention;
FIG. 14 is a top-up to design position of a construction method of an embodiment of the present invention;
fig. 15 is a schematic overall structure of the jacking device according to the embodiment of the invention.
Fig. 16 is an enlarged schematic view of the portion a in fig. 15.
Reference numerals illustrate: 11. a frame bridge; 12. a back beam; 13. a carbon fiber lubricating plate; 14. jacking an oil cylinder; 15. a transfer beam; 16. a first distribution beam; 17. a second distribution beam; 18. a third distribution beam; 19. a sliding support; 20. and sliding the roller.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The embodiment of the invention discloses a jacking construction method for a frame-structured bridge of a underpass railway.
Referring to fig. 1 to 14, a method for jacking a frame bridge of a underpass railway comprises the following steps:
s1, construction preparation work;
S11, preparing a technology;
S12, preparing materials;
s13, preparing a machine tool;
S14, preparing operation conditions.
S2, removing sleeper walls and sound barriers;
Removing barriers influencing construction conditions, such as sleeper walls, sound barriers, moving and changing barriers, and the like in a construction railway section.
S3, stress relief;
Because the line is required to be a slotted line when the transverse lifting beam is erected in the construction process of the frame bridge, the seamless line in the construction area needs to be replaced and paved into a 25m standard rail line in order to ensure the smooth construction and the driving safety. Dividing the unit rails in the seamless line, placing the broken long rail at a proper position outside the roadbed, replacing and paving the long rail with the 25m standard rail, replacing and paving the 25m standard rail with the existing long rail after the construction of the frame bridge engineering is completed, and recovering the seamless line to be in an original state.
The stress relief process flow comprises the steps of construction preparation, fastener removal, roller placement, rail temperature measurement, rail temperature range locking, stress relief by adopting a roller method if the rail temperature is within the rail temperature range locking, stress relief by adopting a stretching method if the rail temperature is not within the rail temperature range locking, stress relief by adopting a collision rail, uniform stress relief, roller removal, rail groove falling, fastening and line locking.
S4, constructing a rail Shu Liang;
the rail beam reinforcement is carried out on the line before the construction of the transverse lifting beam supporting crown beam and the protective pile. Before the track beam construction, the sleeper in the reinforcing range of the transverse lifting beam is replaced by a sleeper by a sealing lock.
Each wood sleeper is nailed by P60 iron pad spikes, and tamping and ballast supplementing are performed in time after the replacement is finished. The length of each line of the replaced wooden sleeper is not smaller than 21m outside the newly built frame construction bridge side wall. The U-shaped bolt for buckling the rail is penetrated and laid down along with the sleeper and cannot be higher than the rail surface of the main rail.
The hanging rail beam adopts a 43kg/m steel rail, and the assembling mode is 3-5-5-3 buckling rail. The outer sides of the two rails are 1+2 buckling rails, the inner sides of the rails are 2+3 buckling rails, the buckling rails are staggered by adopting two lengths of 12.5m and 6.25m, the joints are ensured to be staggered, the joints of the rails are staggered by more than 1.0m, the two ends of the joints are flush with the longitudinal beams, and the temporary shuttle heads are additionally arranged. The hanging sleeper and sleeper below the hanging sleeper are connected together by U-shaped bolts and angle steel to strengthen the integrity of the hanging sleeper, and track gauge rods are arranged every 2.5m, so that the track gauge is strictly controlled.
The fastener uses U-shaped bolt and steel buckle plate to use, and U-shaped bolt uses phi 22 round steel to make.
S5, transverse beam lifting construction;
And (3) after the roadbed protection pile crown beam and the support crown beam are completed, performing transverse beam lifting installation and transverse beam lifting construction.
The cross beam adopts I56b I-steel, one end of the cross beam is supported on the top of the frame top plate, the other end of the cross beam is supported on the top crown beam of the Sun Xin uplink line side protection pile, and the middle of the cross beam is a supporting crown beam.
The cross beams are bound below the sleepers, the distance between the cross beams is not more than 0.6m, and the suspended length of the cross beams is not more than 8m. And the beam is firmly connected with the hanger rail and the sleeper by adopting a bolt with the diameter of 22U. Immediately after each beam is installed, the ballast under the beam is compacted,
The longitudinal beams are I56b I-steel, are arranged in a double-root one-beam mode and are arranged on the cross beams. Is positioned at the 2.1m position on the two sides of the line and is connected with the cross beam by a U-shaped bolt.
S6, line reinforcement;
In order to ensure that soil collapse caused by earth excavation and jacking of a frame bridge during jacking construction of the frame bridge affects stability and driving safety of a railway subgrade, protective piles, crown beams, supporting piles and anti-moving piles are required to be arranged.
Protection stake and crown beam: roadbed protection piles are arranged at two sides of a railway line roadbed, the longer the pile length of the side of the excavated earthwork is, the shorter the pile length of the side of the construction of the bridge is, the crown beam connection is arranged at the top of the roadbed protection pile, and the roadbed protection pile and the crown beam are of reinforced concrete structures.
The method for reinforcing the frame bridge line adopts a transverse lifting beam reinforcing method, and the supporting piles are required to be arranged between the instant railway lines and the road shoulders before the transverse lifting Liang Gongzi steel is penetrated, so that the supporting bearing capacity of the reinforced transverse lifting beam structure meets the requirements, and the stability of the transverse lifting beam structure and the normal running safety of the railway are ensured. The setting forms of the support pile steel bars and the concrete are consistent with those of the roadbed protection piles, and the support piles are manually broken in the jacking construction process of the frame construction bridge.
And (3) pile movement resistance: when the frame bridge jacking construction is performed, liang Gongzi steel displacement is transversely lifted due to jacking thrust in the jacking process, so that railway line change is caused to influence driving. And an anti-moving pile and a crown beam fixing transverse lifting Liang Gongzi steel are arranged on the outer side of the roadbed in front of the jack-in pit. The anti-displacement pile top is provided with an L-shaped crown beam, the top surface of the crown beam is transversely lifted to the position of a beam mounting cross beam, and after the mounting of the cross beam I-beam is completed, the cross beam I-beam is welded, so that the cross beam I-beam is prevented from moving during the jacking construction of the frame bridge. The arrangement mode of the anti-displacement pile reinforced bars and the concrete is consistent with that of the roadbed protection piles.
Back pile: the back pile is arranged at one side of the working pit which is 10 meters away from the railway, the pile foundation construction uses a rotary drilling rig to form holes, the underwater concrete pouring pile forming construction is carried out, and the construction method is consistent with the construction method of the roadbed protection pile foundation.
S7, digging a working pit;
the back piles and the protection piles are constructed simultaneously, 14 back piles are arranged in each working pit, the pile diameter is 1.25, the pile length is 9m, and the pile spacing is 1.35m. And the guard piles are provided with crown beams, the width of each crown beam is 1.5m, the height of each crown beam is 1.2m, and the length of each crown beam is 2.057m.
The working pit is excavated by adopting manual work matched with an excavator, and earthwork is transported by an automobile. And excavating the working pit according to the design mileage, the structural dimension center line and the elevation of the framed bridge. And reserving a surplus amount of 10-30cm away from the bottom of the working pit when the excavator excavates, and leveling by manual bottom cleaning. And when the foundation is cleaned, temporary drainage ditches and water collecting wells (pumping water by a water pump) are built on two sides of the foundation pit bottom so as to immediately draw out accumulated water in the pit and ensure the dry state of the working pit. A soil water retaining dike with the bottom width of 0.4m, the upper width of 0.2m and the height of 0.3m is built around the outer edge of the working pit so as to prevent rainwater from being poured into the working pit; and a drainage ditch is dug at the periphery of the working pit, and a water accumulation pit is arranged for drainage, so that water pumping equipment and personnel are equipped.
And the construction of the sliding plate is that the sliding plate adopts C30 reinforced concrete with the thickness of 20cm, a ground anchor beam is arranged below the sliding plate, and guide piers are arranged on two sides of the sliding plate. Before the construction of the working slide plate, the foundation pit bottom is tamped, a 20cm broken stone cushion layer is paved, and the slide plate and the ground anchor beam are poured together.
The manufacturing work slide should strictly control the concrete surface flatness, and the roughness should be kept within 5mm, and slide reinforcing bar and back stake reinforcing bar connect into a whole to once pour the shaping. The center line of the working slide plate is consistent with the center line of the frame bridge. The front end of the sliding plate is 50cm longer than the frame wall body, the rear end of the sliding plate is 200cm longer than the frame wall body, and the two sides of the sliding plate are 35cm wider than the culvert body.
S8, prefabricating a frame bridge;
The frame bridge is of a C40 reinforced concrete structure. Prefabricating in a section mode. Prefabrication is to contain the body and divide twice to pour, and first pouring main part bottom plate, second pouring main part side wall and roof.
The frame bridge prefabrication process flow comprises the following steps: reinforcing steel bar processing and installing, construction of a frame bridge bottom plate, construction of a frame bridge side wall and a top plate, waterproof layer and protective layer, and earthing of a back pile, wherein the concrete steps are as follows:
Because the frame structure bridge is jacking construction, the frame structure bridge self-weight 3000T, the counter force caused by jacking various friction forces is larger, and the back pile is required to provide larger counter force. The back pile is required to be filled with a large amount of earthwork to increase the counter force of the back pile so as to ensure that the back pile is not damaged. The original back pile of the construction site is the existing carbon cut slope and is high Cheng Bi new frame bridge, and the existing cut slope earthwork can be utilized without filling soil in the frame bridge construction process. Enough back pile earthwork is reserved when cutting slope earthwork is removed, and the frame bridge jacking counterforce effect can be met.
S9, jacking a frame bridge;
The jacking frame bridge concrete reaches 100% strength, and after the longitudinal and transverse I-shaped steel beams are completed, jacking operation can be carried out on the frame bridge, and grouting reinforcement is needed to be carried out on the railway roadbed before jacking. The maximum jacking force 6968t of the bridge is 35m. The bridge jacking equipment selects 500t jacks, 17 jacking picks are uniformly distributed on the pre-buried steel plates of the distribution beam (14 jacking picks are used for construction, and 3 jacking picks are used for standby so as to be beneficial to correction in the jacking process of the frame construction).
S91, roof test;
After all the hydraulic systems are installed, the test can be performed after the normal operation.
The test jacking force is 1.2 times of the self weight of the structure, the jacking pick is pressurized step by step, the equipment sliding plate and the frame structure are checked after each pressurization, and the equipment sliding plate and the frame structure suddenly descend in the pressurization process, so that the frame starts to slide and can be jacked continuously.
S92, jacking;
Installing a jack, a jacking control console, an oil pump and other equipment: the axes of the jacking iron and the jack are consistent with the jacking operation direction and are perpendicular to the distribution beam, a person cannot stand above the jacking iron in jacking, and the condition of jacking equipment is observed at any time in jacking.
In the jacking process, the front support piles are required to be chiseled out for 3 times, the chiseling position of the pile foundation is 10cm below the bottom plate of the frame bridge, and the working pits are chiseled out and transported in sections. Along with jacking construction, mortar steel pipes with the diameter of 10cm, 100I-steel and height-adjusting steel plates are gradually placed between the cross beams and the top surface of the frame bridge.
When the steel blade angle of the frame bridge is jacked to a position 50cm close to the front surface of the supporting pile, the foundation protecting pile of the jacking surface of the frame bridge is chiseled off, the supporting pile is jacked to the center of the line, and the supporting pile is blocked pointing chisel for the second time. And repeatedly jacking to the roadbed protection piles outside, and blocking and chiseling the protection piles for the third time. And continuously jacking until the steel blade angle reaches the outer anti-slide pile, removing the steel blade angle, and jacking the frame bridge to the designed position.
And (3) blocking Sun Xin uplink and downlink, amblyseius line and east and new downlink in a short period during jacking construction, checking the line state, and carrying out jacking operation all the day on the premise of not damaging roadbeds at two sides of the frame bridge as much as possible, and repeating soil taking and external transportation jacking until the frame bridge is jacked into place. When a train passes through, the soil sampling operation is forbidden.
The earthwork uses a small excavator to transport the earthwork from the inside of the frame bridge through the earth excavation and the outside of the forklift.
S10, line recovery.
S101, backfilling railway ballast;
The railway ballast adopts automobile transportation, a loader is matched with a collision car, the railway ballast is transported to a construction site by utilizing a road and a construction passageway along the road, and before the railway ballast is transported, personnel in the material department need to check and confirm the quality and the quantity of the railway ballast and record the quality and the quantity of the railway ballast. During the transportation process, tarpaulin is covered on the stone ballast to prevent the stone ballast from being polluted.
The mechanical cooperation manual backfill railway ballast, manual tamper tamping, the aspect of the appearance aspects such as the vertical and horizontal gradient, width, thickness and middle groove of the backfill finished railway ballast face need to meet the design rule requirement, the tool is used for checking the flatness of the ballast face, and the curve section is never allowed to be reversely ultrahigh.
S102, disassembling a longitudinal beam;
The crane cooperates the manual work to demolish longeron construction. Because the upper transverse lifting beam and the lower transverse lifting beam of the frame structure are padded by the skids, after the U-shaped bolts of the longitudinal beams are loosened, the circuit on the frame structure cannot be subjected to sinking change. However, the filling sections on the two sides of the frame structure are easy to sink greatly due to the large ballast backfill thickness, and the vibration tamping machine is used for reinforcing tamping after the U-shaped bolts of the longitudinal beams are loosened.
The splice plates or the upper welding plates are removed, the I-steel sheets in the longitudinal beam bundles are separated one by a rack press in advance, and the spacer is filled to reserve an operation space. And removing one piece and then carrying out the next piece.
S103, disassembling the rail beam;
and (5) mechanically matching with manual construction. The dismantling sequence is that the line center is firstly and then the two sides of the line are completely dismantled, and the line is completely lifted by a vibration tamping machine to be tamping for 2 times, so that the line is ensured to be stable.
S104, drawing a transverse lifting beam;
The extraction of the transverse lifting beams is carried out from one end of the line reinforcement section to the other end, and six transverse lifting beams are removed every day. Before the transverse lifting beam is pulled out, the wooden wedge on the transverse lifting beam is pulled out, so that the pulling-out resistance of the transverse lifting beam is reduced, and the U-shaped bolt of the rail buckling beam is conveniently pulled out.
Traction machinery can be used for drawing out the transverse lifting beam. The traction machine may consist of 1 or 2 loaders or excavators.
After each piece of transverse lifting beam is pulled out, the ballast should be backfilled and tamped immediately. When the ballast is lacking or the tamping is not kept, the transverse lifting beam should be stopped to be pulled out. After all the pumping is finished, the vibrating tamper is used for fully lifting the track and tamping for 2 times.
S105, sleeper replacement is performed;
the sleeper is manually replaced, the wooden sleeper is replaced by the concrete sleeper through mechanical cooperation, the wooden sleeper is replaced by the concrete sleeper, and the wooden sleeper is identical to the concrete sleeper and is required according to a design drawing.
S106, restoring traffic;
And recovering the sleeper wall and the sound barrier, and recovering the formal train operation of the railway line after the construction of the frame bridge is completed.
Referring to fig. 15 and 16, the embodiment of the present application also discloses a jacking device for the frame bridge 11 of the underpass railway, which is applied to the jacking construction method for the frame bridge 11 of the underpass railway disclosed in the above embodiment, and the jacking device comprises the frame bridge 11, the back beam 12, the carbon fiber lubricating plate 13, the jacking cylinder 14, the force transmission beam 15, the first distribution beam 16, the second distribution beam 17, the third distribution beam 18, the sliding bracket 19 and the sliding roller 20.
The carbon fiber lubricating plate 13 is arranged at the bottom of the frame bridge 11, the number of the carbon fiber lubricating plates 13 is multiple, the carbon fiber lubricating plates 13 are distributed in parallel side by side, the carbon fiber lubricating plates 13 bear the weight of the frame bridge 11 together, and the carbon fiber lubricating plates 13 provide a sliding base for the frame bridge 11 together.
The back pile is a foundation pile, which is mainly a jack-up base, so that the jack-up cylinder 14 can obtain a reaction force when jack-up is performed.
The jacking oil cylinders 14 are arranged on the carbon fiber lubricating plates 13, the number of the jacking oil cylinders 14 is multiple, the jacking oil cylinders 14 are uniformly distributed on the carbon fiber lubricating plates 13 side by side, and the jacking oil cylinders 14 jack the frame bridge 11 together.
The force transfer beam 15 is positioned between the cylinder body of the jacking cylinder 14 and the back beam 12, and two ends of the force transfer beam are fixedly connected with the cylinder body of the jacking cylinder 14 and the back beam 12 respectively;
The first distribution beam 16 is positioned between the frame bridge 11 and the jacking cylinder 14, and two ends of the first distribution beam are fixedly connected with telescopic rods of the frame bridge 11 and the jacking cylinder 14 respectively;
The second distribution beam 17 is positioned between the jacking oil cylinder 14 and the force transfer beam 15, and two ends of the second distribution beam are fixedly connected with the cylinder body of the jacking oil cylinder 14 and the force transfer beam 15 respectively;
The third distribution beam 18 is positioned between the force transfer beam 15 and the back beam 12, and two ends of the third distribution beam are fixedly connected with the force transfer beam 15 and the back beam 12 respectively;
The sliding bracket 19 is arranged at the bottom of the cylinder body of the jacking cylinder 14;
The sliding roller 20 is rotatably connected to the sliding bracket 19, the bottom of the sliding roller 20 is positioned on the carbon fiber lubrication plate 13, and the sliding roller 20 can roll on the carbon fiber lubrication plate 13;
The bottom of the cylinder body of each jacking cylinder 14 is provided with a sliding bracket 19 and a sliding roller 20, so that the cylinder body of the jacking cylinder 14 can stably move on the carbon fiber lubricating plate 13 when the force transfer beam 15 needs to be added after the jacking cylinder 14 reaches the maximum stroke.
The above embodiments are not intended to limit the scope of the present invention, so: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.
Claims (10)
1. The construction method for jacking the underpass railway frame bridge is characterized by comprising the following steps of:
s1, construction preparation work;
s2, removing sleeper walls and sound barriers;
S3, stress relief;
S4, constructing a rail Shu Liang;
s5, transverse beam lifting construction;
S6, line reinforcement;
s7, digging a working pit;
s8, prefabricating a frame bridge;
The process flow of prefabricating the frame bridge comprises the following steps: reinforcing steel bar processing and installation, construction of a frame bridge bottom plate, construction of a frame bridge side wall and a top plate, and earthing of a waterproof layer, a protective layer and a back pile;
S9, jacking a frame bridge;
Jacking frame bridge concrete to 100% strength, and jacking the frame bridge after the longitudinal and transverse I-shaped steel beams are completed, wherein grouting reinforcement is needed to be carried out on the railway roadbed before jacking;
s91, roof test;
after all hydraulic systems are installed, testing the test roof after normal operation;
The jacking force is 1.2 times of the self weight of the structure, the jacking pick is pressurized step by step, the equipment sliding plate and the frame structure are checked after each pressurization, and the equipment sliding plate and the frame structure suddenly descend in the pressurization process, which indicates that the frame starts to slide and continues jacking;
S92, jacking;
Installing a jack, a jacking control console and an oil pump; the axes of the jacking iron and the jack are consistent with the jacking operation direction and are perpendicular to the distribution beam, and the jacking jack condition is observed in jacking;
In the jacking process, chiseling the front support pile for 3 times, wherein the chiseling position of the pile foundation is 10cm below the bottom plate of the frame bridge, and chiseling and conveying out of a working pit in sections; along with jacking construction, mortar steel pipes with the diameter of 10cm, 100I-steel and height-adjusting steel plates are gradually arranged between the cross beams and the top surface of the frame bridge;
When the steel blade angle of the frame bridge is jacked to a position 50cm close to the front surface of the supporting pile, the foundation protecting pile of the jacking surface of the frame bridge is chiseled off, the supporting pile is jacked to the center of the line, and the supporting pile is blocked pointing chisel for the second time; repeatedly jacking to the outer roadbed protection piles, and blocking and chiseling the protection piles for the third time; continuously jacking until the steel blade angle reaches the outer anti-slide pile, removing the steel blade angle, and jacking the frame bridge to the designed position;
S10, line recovery.
2. The method for jacking construction of a underpass railway frame bridge according to claim 1, wherein S1 comprises the steps of:
S11, preparing a technology;
S12, preparing materials;
s13, preparing a machine tool;
S14, preparing operation conditions.
3. The method for jacking construction of a underpass railway frame bridge according to claim 1, wherein said S3 comprises the steps of:
preparing construction, removing fasteners, placing rollers, measuring rail temperature, judging whether the rail temperature is in a locking rail temperature range, adopting a roller method to release stress when the rail temperature is in the locking rail temperature range, adopting a stretching method to release stress when the rail temperature is not in the locking rail temperature range, striking the rail to release stress, uniformly releasing stress, removing the rollers, falling the steel rail, tightening the fastener and locking a line.
4. The method for jacking construction of a underpass railway frame bridge according to claim 1, wherein said S4 comprises the steps of:
before the track beam construction, the sleeper in the reinforcing range of the transverse lifting beam is replaced by a wooden sleeper by utilizing a sealing lock;
Each wood sleeper is nailed by P60 iron pad spikes, and tamping and supplementing ballast are performed in time after the replacement is finished; the length of each line of the replaced wooden sleeper is not smaller than 21m outside the newly-built frame bridge side wall; the U-shaped bolt for buckling the rail is penetrated and laid down along with the sleeper and cannot be higher than the rail surface of the main rail;
The hanging rail beam adopts a 43kg/m steel rail, and the assembling mode is 3-5-5-3 buckling rails; the outer sides of the two rails are provided with 1+2 buckling rails, the inner sides of the rails are provided with 2+3 buckling rails, the buckling rails are provided with two lengths of 12.5m and 6.25m in a staggered manner, so that joints are staggered, the joints of the rails are staggered by more than 1.0m, the two ends of the joints are flush with the longitudinal beams, and a temporary shuttle head is additionally arranged; the hanging pillow and the sleeper below the hanging pillow are connected together by a U-shaped bolt and angle steel to strengthen the integrity of the hanging pillow, and a track gauge rod is arranged every 2.5 m;
the fastener uses U-shaped bolt and steel buckle plate to use in combination.
5. The method for jacking construction of the underpass railway frame bridge according to claim 1, wherein the step S5 comprises the steps of:
The method comprises the steps of (1) installing a transverse lifting beam after the completion of a roadbed protection pile crown beam and a support crown beam, and constructing the transverse lifting beam;
The cross beam adopts I56b I-steel, one end of the cross beam is supported on the top of the frame top plate, the other end of the cross beam is supported on the top crown beam of the protective pile at the uplink line side, and the middle of the cross beam is a supporting crown beam;
The cross beams are bound below the sleepers, the distance between the cross beams is not more than 0.6m, and the suspended length of the cross beams is not more than 8m; the beam is firmly connected with the hanger rail and the sleeper by adopting a bolt with the diameter of 22U; immediately tamping and compacting the ballast under each beam after installing the beam;
the longitudinal beams are arranged on the cross beams in a double-root one-beam way by adopting I56b I-steel; is positioned at the 2.1m position on the two sides of the line and is connected with the cross beam by a U-shaped bolt.
6. The method for jacking construction of the underpass railway frame bridge according to claim 1, wherein the step S6 comprises the steps of:
the line reinforcement comprises the arrangement of a protection pile, a crown beam, a support pile and an anti-moving pile;
Protection stake and crown beam: roadbed protection piles are arranged at two sides of a railway line roadbed, the longer the pile length of the side of the excavated earth is, the shorter the pile length of the side of the construction of the side of the bridge is, the crown beam connection is arranged at the top of the roadbed protection pile, and the roadbed protection pile and the crown beam are of reinforced concrete structures;
And (3) supporting piles: the frame bridge line reinforcement method adopts a transverse lifting beam reinforcement method, and support piles are required to be arranged between the instant wire railway lines and road shoulders before transverse lifting Liang Gongzi steel is penetrated, so that the support bearing capacity of the reinforced transverse lifting beam structure meets the requirements, and the stability of the transverse lifting beam structure and the normal running safety of a railway are ensured; the arrangement forms of the support pile steel bars and the concrete are consistent with those of the roadbed protective piles, and the support piles are manually broken in the jacking construction process of the frame bridge;
And (3) pile movement resistance: when the frame bridge jacking construction is performed, the railway line change is caused to influence driving in order to prevent the transverse lifting Liang Gongzi steel displacement caused by the jacking thrust in the jacking process; arranging anti-moving piles and steel Liang Gongzi for crown beam fixing and transverse lifting outside the roadbed in front of the jack-in pit; an L-shaped crown beam is arranged at the pile top of the anti-moving pile, an embedded steel plate is arranged at the position of a transverse lifting beam mounting beam on the top surface of the crown beam, and the transverse lifting beam is welded after the mounting of the transverse beam I-steel is finished, so that the transverse beam I-steel is prevented from moving during the jacking construction of the frame bridge; the arrangement mode of the anti-displacement pile reinforced bars and the concrete is consistent with that of the roadbed protection piles;
back pile: the back pile is arranged at one side of the working pit which is 10 meters away from the railway, the pile foundation construction uses a rotary drilling rig to form holes, the underwater concrete pouring pile forming construction is carried out, and the construction method is consistent with the construction method of the roadbed protection pile foundation.
7. The method for jacking construction of the underpass railway frame bridge according to claim 1, wherein the step S7 comprises the steps of:
The back piles and the protection piles are constructed simultaneously, 14 back piles are arranged in each working pit, the pile diameter is 1.25, the pile length is 9m, and the pile spacing is 1.35m; the guard piles are provided with crown beams, the width of each crown beam is 1.5m, the height of each crown beam is 1.2m, and the length of each crown beam is 2.057m;
The working pit is excavated by adopting manual work matched with an excavator, and the earthwork is transported by an automobile; the working pit is excavated according to the design mileage, the structural dimension center line and the elevation of the frame bridge; reserving a surplus amount of 10-30cm away from the bottom of a working pit during excavation of an excavator, and leveling by manual bottom cleaning; constructing temporary drainage ditches and water collecting wells for pumping water by a water pump at two sides of the foundation pit bottom while cleaning the foundation pit so as to immediately pump out accumulated water in the pit and enable the working pit to be in a dry state; a soil water retaining dike with the bottom width of 0.4m, the upper width of 0.2m and the height of 0.3m is built around the outer edge of the working pit so as to prevent rainwater from being poured into the working pit; digging a drainage ditch at the periphery of the working pit, and arranging drainage of a water accumulation pit, and providing water pumping equipment and personnel;
And (3) construction of a sliding plate: the slide plate is made of C30 reinforced concrete with the thickness of 20cm, a ground anchor beam is arranged below the slide plate, and guide piers are arranged on two sides of the slide plate; before the construction of a working slide plate, tamping the bottom of a foundation pit, paving a 20cm broken stone cushion layer, and pouring the slide plate and a ground anchor beam together;
The working slide plate is manufactured by controlling the surface evenness of the concrete, keeping the evenness within 5mm, connecting the slide plate steel bars and the back pile steel bars into a whole, and casting and forming at one time; the center line of the working slide plate is consistent with the center line of the frame bridge; the front end of the sliding plate is 50cm longer than the frame wall body, the rear end of the sliding plate is 200cm longer than the frame wall body, and the two sides of the sliding plate are 35cm wider than the culvert body.
8. The method for jacking construction of a underpass railway frame bridge according to claim 1, wherein said S10 comprises the steps of:
S101, backfilling railway ballast;
The railway ballast is transported by adopting an automobile, a loader is matched with a collision car, the railway ballast is transported to a construction site by utilizing a road and a construction passageway along the road, and before the railway ballast is transported, the quality and the quantity of the railway ballast are checked and confirmed by personnel in a material part before the railway ballast is transported, and records are made; tarpaulin covering is carried out on the stone ballast during the transportation process, so that the stone ballast is prevented from being polluted;
the method is characterized in that the ballast is mechanically matched with manual backfill, a manual tamping machine is used for tamping, the aspect of the longitudinal and transverse gradient, the width, the thickness, the middle groove and other appearance of the backfill-finished ballast surface are required to meet the design regulation requirements, the tool is used for checking the flatness of the ballast surface, and the curve section is never allowed to be reversely ultrahigh;
s102, disassembling a longitudinal beam;
the crane is matched with manpower to carry out the construction of dismantling the longitudinal beam; because the upper transverse lifting beam and the lower transverse lifting beam of the frame structure are padded by the skids, after the U-shaped bolts of the longitudinal beams are loosened, the circuit on the frame structure cannot be subjected to sinking change; however, the filling sections on the two sides of the frame structure are large in ballast backfill thickness, so that the circuit is easy to sink greatly, and a vibration tamping machine is used for reinforcing tamping after the U-shaped bolts of the longitudinal beams are loosened;
Removing splice plates or side welding plates, separating each I-steel sheet in the longitudinal beam bundle sheet by using a rack press in advance, and filling with a spacer to reserve an operation space; removing one piece and then carrying out the next piece;
s103, disassembling the rail beam;
Mechanically matching with manual construction; the dismantling sequence is that the center of the line is firstly dismantled and then the two sides of the line are completely dismantled, and the line is comprehensively lifted and tamping is carried out for 2 times by using a vibration tamping machine, so that the stability of the line is ensured;
s104, drawing a transverse lifting beam;
The transverse lifting beams are extracted from one end of the line reinforcement section to the other end of the line reinforcement section, and six transverse lifting beams are removed every day; before the transverse lifting beam is pulled out, the wooden wedge on the transverse lifting beam is pulled out, so that the pulling-out resistance of the transverse lifting beam is reduced, and the U-shaped bolt of the rail buckling beam is conveniently pulled out;
the drawing-out transverse lifting beam can use a traction machine which can be composed of 1 or 2 loaders or excavators;
backfilling ballast and tamping after each piece of transverse lifting beam is pulled out; when the ballast is lacking or the tamping is not kept, the transverse lifting beam is stopped to be pulled out; after all the pumping is finished, the track is comprehensively lifted by a vibration tamping machine and tamping is carried out for 2 times;
s105, sleeper replacement is performed;
the sleeper is manually replaced, the wooden sleeper is replaced by the concrete sleeper through mechanical cooperation, the wooden sleeper is replaced by the concrete sleeper, and the wooden sleeper is identical to the concrete sleeper and is required according to a design drawing.
9. The method for jacking construction of a underpass railway frame bridge as claimed in claim 8, wherein said S10 further comprises the steps of:
s106, recovering the sleeper wall and the sound barrier, and recovering the formal train operation of the railway line after the construction of the frame bridge is completed.
10. A push-up device for a frame bridge of a underpass railway, which is applied to a push-up construction method for a frame bridge of a underpass railway according to any one of claims 1 to 9, and is characterized by comprising:
The frame structure bridge and the back pile;
The carbon fiber lubricating plate is arranged at the bottom of the frame bridge and is used for bearing the frame bridge and providing a sliding base for the frame bridge;
the jacking oil cylinder is arranged on the carbon fiber lubricating plate;
The force transfer beam is positioned between the cylinder body of the jacking oil cylinder and the back beam, and two ends of the force transfer beam are fixedly connected with the cylinder body of the jacking oil cylinder and the back beam respectively;
the first distribution beam is positioned between the frame bridge and the jacking oil cylinder, and two ends of the first distribution beam are fixedly connected with the telescopic rods of the frame bridge and the jacking oil cylinder respectively;
the second distribution beam is positioned between the jacking oil cylinder and the force transfer beam, and two ends of the second distribution beam are fixedly connected with the cylinder body of the jacking oil cylinder and the force transfer beam respectively;
the third distribution beam is positioned between the force transfer beam and the back beam, and two ends of the third distribution beam are fixedly connected with the force transfer beam and the back beam respectively;
The sliding bracket is arranged at the bottom of the cylinder body of the jacking cylinder; and
The sliding roller is rotationally connected to the sliding support, and the bottom is positioned on the carbon fiber lubricating plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410318400.0A CN117966617A (en) | 2024-03-20 | 2024-03-20 | A jacking construction method and device for a frame bridge under a railway |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410318400.0A CN117966617A (en) | 2024-03-20 | 2024-03-20 | A jacking construction method and device for a frame bridge under a railway |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118653498A (en) * | 2024-08-21 | 2024-09-17 | 中交二公局华西建设有限公司 | Protective structure and construction method for high-speed underpass of heavy-load railway |
| CN119243532A (en) * | 2024-10-12 | 2025-01-03 | 郑州宙晖工程技术有限公司 | D-beam overhead jacking method |
| CN119332619A (en) * | 2024-12-02 | 2025-01-21 | 中铁第一勘察设计院集团有限公司 | Jacking construction method and equipment for long-span railway box bridge |
-
2024
- 2024-03-20 CN CN202410318400.0A patent/CN117966617A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118653498A (en) * | 2024-08-21 | 2024-09-17 | 中交二公局华西建设有限公司 | Protective structure and construction method for high-speed underpass of heavy-load railway |
| CN118653498B (en) * | 2024-08-21 | 2024-10-29 | 中交二公局华西建设有限公司 | Protective structure and construction method for high-speed underpass of heavy-load railway |
| CN119243532A (en) * | 2024-10-12 | 2025-01-03 | 郑州宙晖工程技术有限公司 | D-beam overhead jacking method |
| CN119243532B (en) * | 2024-10-12 | 2025-10-03 | 郑州宙晖工程技术有限公司 | D-beam overhead jacking method |
| CN119332619A (en) * | 2024-12-02 | 2025-01-21 | 中铁第一勘察设计院集团有限公司 | Jacking construction method and equipment for long-span railway box bridge |
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