CN106284059A - A kind of variable diameters arch rib being applicable to bridge - Google Patents
A kind of variable diameters arch rib being applicable to bridge Download PDFInfo
- Publication number
- CN106284059A CN106284059A CN201610934207.5A CN201610934207A CN106284059A CN 106284059 A CN106284059 A CN 106284059A CN 201610934207 A CN201610934207 A CN 201610934207A CN 106284059 A CN106284059 A CN 106284059A
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- arch rib
- pipeline section
- arch
- steel pipe
- variable diameters
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 72
- 239000010959 steel Substances 0.000 claims abstract description 72
- 238000003032 molecular docking Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 12
- 230000004308 accommodation Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The present invention relates to bridge technology field, it is specifically related to a kind of variable diameters arch rib being applicable to bridge, arch rib is the concrete filled steel tube including steel pipe and concrete, the steel pipe of arch rib is positioned at the external diameter of vault part less than the external diameter being positioned at arch springing part, thus, stress range of accommodation is big, can meet design requirement, span centre region material can be saved, and shorten the engineering time.
Description
Technical field
The present invention relates to bridge technology field, be specifically related to a kind of variable diameters arch rib being applicable to bridge.
Background technology
Arch bridge refers to the bridge using arch rib as the main supporting member of structure.At present, CFST Arch Bridge, concrete arch
Bridge and steel arch bridge are the three big main bridge types in China arch bridge field, and wherein quantity is with CFST Arch Bridge for, steel tube concrete
The arch rib of soil arch bridge is formed by the Combined concrete filled in steel pipe and steel pipe.Mix owing to the radial constraint of steel pipe limits pressurized
The expansion of solidifying soil, makes concrete be in three dimension stress state, thus significantly improves the comprcssive strength of concrete.
The arch rib of built CFST Arch Bridge all have employed equal diameter concrete filled steel tube, although this structure has obtained
Arrive extensive application, but it has still suffered from some limitation, mainly shows themselves in that
1, internal force range of accommodation is the least, it is impossible to adapt to the needs of arch rib diverse location stress change completely.The transmission of arch bridge load
Approach is: arch rib span centre region load and internal force are first all transferred at arch springing, then are transferred to ground by arch springing.Therefore, more lean on
Nearly arch springing, the internal force that arch rib section undertakes is the biggest, and arch rib span is the biggest, and the internal force difference in arch rib span centre and arch springing cross section is the biggest.
The method designing commonly used adjustment thickness of steel pipe at present, but the part being only capable of little scope solves arch rib diverse location force difference
Problem, for the CFST Arch Bridge of large span, even if using the steel pipe becoming wall thickness, arch rib span centre and arch springing force on cross-section
Still differ huge, such as arch springing force on cross-section is its spaning middle section 3.89 times of the CFST Arch Bridge of main span 430m, by
Being limited to steel tube section in the method adjusting wall thickness, the internal force scope that therefore it can regulate is less, only with adjusting steel pipe walls
Thick method cannot meet design requirement.
2, because constructing the former waste thus resulting in rib structure material.For Long-Span Concrete Filled Steel Tubular Arch Bridges, arch springing
Stress is the biggest need to use large diameter steel pipe, if arch rib uses equal diameter concrete filled steel tube, because of arch rib span centre region stress very
Little, use very thin-walled thickness can meet force request.But for textural, thickness of steel pipe and its caliber need to mate and could fully send out
Wave the stress performance of concrete filled steel tube, the i.e. thickness of steel pipe in arch rib span centre region can only be decreased to construct wall thickness, thus lead
Cause the waste of span centre region arch rib material.
Summary of the invention
It is an object of the invention to: arch rib diverse location can not be adapted to completely for current Filled Steel Tubular Arch Bridge and be subject to
The needs of power change, the problem of span centre region material waste, it is provided that a kind of variable diameters arch rib being applicable to bridge, it is possible on overcoming
State problem.
To achieve these goals, the technical solution used in the present invention is:
A kind of variable diameters arch rib being applicable to bridge, described arch rib is the concrete filled steel tube including steel pipe and concrete, institute
The steel pipe stating arch rib is positioned at the external diameter of vault part less than the external diameter being positioned at arch springing part.
As preferably, described steel pipe is formed by the docking of at least three pipeline section, is positioned at the pipeline section external diameter of vault part less than position
Pipeline section external diameter in arch springing part.
As preferably, being additionally provided with changeover portion between the pipeline section of adjacent two various outer diameters, described changeover portion is used for connecting
The described pipeline section that adjacent two external diameters are different, the external diameter of changeover portion one end and equal with the pipeline section external diameter that this end connects, the other end
External diameter and equal with the pipeline section external diameter that this other end connects so that overall appearance, it is simple to manufacture processing, more specifically,
Changeover portion and two pipeline sections being connected with this changeover portion are integral type structure, can have preferably by force intensity, certainly, in order to save
About manufacturing cost, changeover portion and connected two pipeline sections can also be other fixed connection structures, can be such as welding or
Threaded.
As preferably, described changeover portion is that one end is relatively large in diameter, the hollow round table shape that other end diameter is less, thus, and energy
The stress enough avoiding junction is concentrated, it is possible to improve the stressing conditions of concrete filled steel tube, makes junction be hardly damaged.
As preferably, at least one described pipeline section is to wait wall thickness, thus, it is simple to processing and manufacturing, simultaneously it can be avoided that non-
The stress occurred Deng wall thickness pipeline section concentrates situation.
As preferably, the wall thickness of pipeline section described at least two is not mutually equal, thereby, it is possible to improve the first pipeline section further
Bending resistance, pressurized and tensile strength, certainly, it is not necessary to change successively, the wall thickness of two adjacent pipeline sections can also be equal,
Can be arranged by design needs.
As preferably, at least one described pipeline section is formed by the docking of at least two steel pipe sections, at least one described pipeline section
In at least two described in the wall thickness of steel pipe sections differ, thus, in use, the sections that wall thickness is thicker is positioned close to arch
The position of foot, is namely arranged on the position that stress is bigger, and owing to wall thickness is the thickest, the resistance to compression of steel pipe, bending resistance and tensile strength are equal
More preferably, thus, the intensity of arch rib is more preferable, and arch rib is more reliable and more stable.
As preferably, described pipeline section is integral type structure, can have preferably by force intensity.
As preferably, seamlessly transit between described changeover portion and described pipeline section, be avoided that the stress of junction is concentrated.
As preferably, the tapering of described changeover portion is 0.05～0.2.
In sum, owing to have employed technique scheme, the application provides the benefit that:
1, stress range of accommodation is big, can meet design requirement: use steel pipe that external diameter is less as the span centre part of arch rib or to lean on
Closely across the structure of middle area part, thus, when arch rib stand under load, the mid span area stress of arch rib is less than arch rib arch springing stress, due to
Arch rib arch springing area of section is more than span centre regional cross section area, and the maximum in arch rib span centre region meets with stresses and arch springing maximum is born
It is not too large that stress compares difference, if adding up to rationally, under a certain stressing conditions, enables to span centre region in theory maximum
Meet with stresses and meet with stresses equal with arch springing maximum；Further, owing to using the mode becoming external diameter, and outer diameter of steel pipes can be with
Need and increase, along with the increase of outer diameter of steel pipes, it is possible to the area of section of concrete filled steel tube is increased, compared to
For only regulating the mode of wall thickness, the stress that this programme can regulate is bigger, is obtained in that infinitely-great range of accommodation in theory,
So that the maximum stress that each cross section of the arch rib of Long-Span Concrete Filled Steel Tubular Arch Bridges can be born is more or less the same, it is possible to full
Foot long-span arch bridge design requirement；
2, span centre region material is saved: owing to the outer diameter of steel pipes in span centre region can not be equal with the outer diameter of steel pipes at arch springing, energy
Enough go design according to stress demand, therefore, it is possible to use the steel pipe that little external diameter thin-walled is thick, thereby, it is possible to save tube material, with
Time save concrete material；
3, the engineering time is shortened: the diameter of steel tube in span centre region is less, and the amount of concrete pouring into this region is less, thereby, it is possible to
Shorten the time of concrete perfusion, thus shorten construction period.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of existing CFST Arch Bridge；
Fig. 2 is the schematic diagram of the application concrete filled steel tube；
Fig. 3 is the another kind of concrete filled steel tube schematic diagram that the application is different from Fig. 2；
Fig. 4 is the another kind of concrete filled steel tube schematic diagram that the application is different from Fig. 3；
Labelling in figure: 1-girder, 2-spandrel column, 3-arch rib, 31-arch rib span centre region, 32-arch springing, 5-changeover portion, 6-manages
Section, 61-steel pipe sections.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the present invention is described in detail.
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, not
For limiting the present invention.
" span centre " used herein i.e. refer to arch rib to this center, " span centre region " i.e. refers to the district near span centre
Territory.
Embodiment 1
As in figure 2 it is shown, a kind of bridge variable diameters concrete filled steel tube, arch rib is the concrete filled steel tube including steel pipe and concrete
Structure, the steel pipe of arch rib is positioned at the external diameter of vault part and is less than the external diameter being positioned at arch springing part, i.e. in the portion nearest near arch springing
Divide the steel pipe using external diameter bigger, and use minor-diameter steel-tube in the part nearest near span centre, thus, when arch rib stand under load,
The span centre region stress of arch rib is less than arch rib arch springing stress, owing to arch rib arch springing area of section is more than span centre regional cross section area,
The stress in arch rib span centre region differs not too large compared with arch springing stress, particularly, under a certain stressing conditions, in theory can
Enough make span centre regional stress equal with arch springing stress；Further, owing to using the mode becoming external diameter, and outer diameter of steel pipes can
Increase with the need, along with the increase of outer diameter of steel pipes, it is possible to the area of section of concrete filled steel tube is increased, compares
For the mode only regulating wall thickness, the range of stress that this programme can regulate is bigger, is obtained in that infinitely-great tune in theory
Adjusting range, the concrete filled steel tube stress making arch springing region is the least such that it is able to make Long-Span Concrete Filled Steel Tubular Arch Bridges
The maximum stress in each cross section of arch rib is more or less the same；Due to span centre region outer diameter of steel pipes can not with arch springing at outer diameter of steel pipes phase
Deng, it is possible to go design according to stress demand, therefore, it is possible to use the steel pipe that little external diameter thin-walled is thick, thereby, it is possible to save steel tubing
Material, saves concrete material simultaneously.
Further, steel pipe is formed by least three pipeline section 6 docking, is positioned at pipeline section 6 external diameter of vault part less than being positioned at
Pipeline section 6 external diameter of arch springing part, the external diameter of at least two pipeline section 6 differs, the external diameter of the distance nearest pipeline section 6 of span centre less than away from
From the external diameter of the nearest pipeline section 6 of arch springing, thus, when for three pipeline sections 6, span centre region is as a pipeline section 6, and two arch springings are attached
Early work is other two pipeline sections 6, and for only regulating the mode of wall thickness, the stress that this programme can regulate is bigger, theoretical
On be obtained in that infinitely-great range of accommodation such that it is able to make the maximum in each cross section of arch rib of Long-Span Concrete Filled Steel Tubular Arch Bridges
Stress is more or less the same, it is possible to meet long-span arch bridge design requirement, and owing to span centre can use the steel pipe that caliber is less, can
To save steel and the concrete material of span centre region pipeline section 6, meanwhile, it is capable to shorten the engineering time.
Further, being additionally provided with changeover portion 5 between the pipeline section of adjacent two various outer diameters, changeover portion 5 is used for connecting phase
The pipeline section 6 that adjacent two external diameters are different, the external diameter of changeover portion 5 one end and equal, outside the other end with pipeline section 6 external diameter that this end connects
Footpath and equal with pipeline section 6 external diameter that this other end connects, so that overall appearance, it is simple to manufacture processing, more specifically, transition
Section 5 and two pipeline sections 6 being connected with this changeover portion 5 are integral type structure, can have preferably by force intensity, certainly, in order to save
About manufacturing cost, changeover portion 5 and connected two pipeline sections 6 can also be other fixed connection structures, can be such as welding
Or it is threaded.
More specifically, changeover portion 5 is relatively large in diameter for one end, the hollow round table shape that other end diameter is less, and stub end is with outer
The bigger pipeline section 6 in footpath connects, the connection that little head end is less with external diameter, and seamlessly transits between changeover portion 5 and pipeline section 6, thus,
It can be avoided that the stress of junction is concentrated, it is possible to improve the stressing conditions of concrete filled steel tube, make junction be hardly damaged, more
Concrete, changeover portion 5 profile is tapered, and changeover portion 5 and pipeline section 6 are excessive by fillet, easy to process, low cost of manufacture.
Further, at least one pipeline section 6 is the pipeline section 6 waiting wall thickness, i.e. this pipeline section 6 is equal along the wall thickness of axis optional position
For definite value, thus, it is simple to processing and manufacturing, simultaneously it can be avoided that the non-stress waiting wall thickness pipeline section 6 to occur concentrates situation, more special
, all pipeline sections 6 are all to wait wall thickness pipeline section 6, so, it is possible to reduce further processing cost,
Embodiment 2
As it is shown on figure 3, the wall thickness of all pipeline sections 6 being different from embodiment 1 is same wall thickness, at least two in the present embodiment
The wall thickness of individual pipeline section 6 is not mutually equal, and by arch springing to span centre, the wall thickness of pipeline section 6 is gradually reduced, i.e. the closer to arch springing position, and pipeline section 6
Wall thickness is the thickest, thereby, it is possible to improve bending resistance, pressurized and the tensile strength of the first pipeline section 6 further, certainly, it is not necessary to
Changing successively, the wall thickness of two adjacent pipeline sections 6 can also be equal, can be arranged by design needs.
Embodiment 3
As shown in Figure 4, be different from embodiment 1 waits wall thickness pipeline section 6, and at least one pipeline section in the present embodiment is by least two
Steel pipe sections 61 1 docking is formed, and the wall thickness of at least two steel pipe sections 61 at least one pipeline section differs, steel pipe sections
61 pipeline sections 6 formed can be integral structure, it is also possible to is welding or the fixed connection structure of threaded formation.This enforcement
Part or all of pipeline section 6 in example is formed by connecting by the sections using wall thickness different, and i.e. partly or entirely pipeline section 6 is not to wait wall thickness
Pipeline section 6, thus, in use, the sections that wall thickness is thicker is positioned close to the position of arch springing, namely be arranged on stress bigger
Position, owing to wall thickness is the thickest, the resistance to compression of steel pipe, bending resistance and tensile strength are all more preferable, and thus, the intensity of arch rib is more preferable, and arch rib is more
Add reliable and stable.
Further, the tapering of changeover portion 5 is 0.05～0.2, and changeover portion 5 profile is cone, and the tapering of this circular cone is
0.05～0.2, the tapering of the application refers to the basal diameter of circular cone and the ratio of cone height, as the tapering when changeover portion 5 is
When 0.05, changeover portion 5 is the longest, and span is bigger, it is possible to save manufacturing cost and construction cost；Certainly, the tapering of changeover portion 5 is also
Can be 0.2, now changeover portion 5 length be less, and span is short, it is possible to adapt to design, makes answering of each region of concrete filled steel tube
Power is more or less the same, and saves material cost；Or, when the tapering of changeover portion 5 is 0.075 or 0.1 or 0.125, now moderate length,
Span is moderate, and in the case of manufacturing cost and construction cost are relatively low, material cost is less, and, concrete filled steel tube is each
The stress difference in region is the most little.
All any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, should be included in
Within protection scope of the present invention.
Claims (10)
1. being applicable to a variable diameters arch rib for bridge, described arch rib is the concrete filled steel tube knot including steel pipe and concrete
Structure, it is characterised in that, the steel pipe of described arch rib is positioned at the external diameter of vault part less than the external diameter being positioned at arch springing part.
Variable diameters arch rib the most according to claim 1, it is characterised in that described steel pipe docked by least three pipeline section and
Become, be positioned at the pipeline section external diameter of vault part less than the pipeline section external diameter being positioned at arch springing part.
Variable diameters arch rib the most according to claim 2, it is characterised in that also set between the pipeline section of adjacent two various outer diameters
Being equipped with changeover portion, described changeover portion is for connecting the described pipeline section that adjacent two external diameters are different.
Variable diameters arch rib the most according to claim 3, it is characterised in that described changeover portion is that one end is relatively large in diameter, another
The hollow round table shape that end diameter is less.
5. according to the variable diameters arch rib described in Claims 1 to 4 any one, it is characterised in that at least one described pipeline section is
Deng wall thickness.
Variable diameters arch rib the most according to claim 5, it is characterised in that the wall thickness of pipeline section described at least two the most not phase
Deng.
Variable diameters arch rib the most according to claim 5, it is characterised in that at least one described pipeline section is by least two steel pipe
Sections docking is formed, and described at least two at least one described pipeline section, the wall thickness of steel pipe sections differs.
Variable diameters arch rib the most according to claim 7, it is characterised in that it is characterized in that, described pipeline section is integral type knot
Structure.
9. according to the variable diameters arch rib of claim 3 or 4, it is characterised in that smoothed between described changeover portion and described pipeline section
Cross.
Variable diameters arch rib the most according to claim 3, it is characterised in that the tapering of described changeover portion is 0.05～0.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610934207.5A CN106284059A (en) | 2016-10-31 | 2016-10-31 | A kind of variable diameters arch rib being applicable to bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610934207.5A CN106284059A (en) | 2016-10-31 | 2016-10-31 | A kind of variable diameters arch rib being applicable to bridge |
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| Publication Number | Publication Date |
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| CN106284059A true CN106284059A (en) | 2017-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610934207.5A Pending CN106284059A (en) | 2016-10-31 | 2016-10-31 | A kind of variable diameters arch rib being applicable to bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108827050A (en) * | 2018-07-04 | 2018-11-16 | 江苏凯唯迪科技有限公司 | A kind of heat pipe of different tube diameters and preparation method thereof |
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| CN206157554U (en) * | 2016-10-31 | 2017-05-10 | 中铁二院工程集团有限责任公司 | Variable diameter arch rib suitable for bridge |
-
2016
- 2016-10-31 CN CN201610934207.5A patent/CN106284059A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040075041A1 (en) * | 2002-01-16 | 2004-04-22 | Bond Lesley O. | Method and apparatus for molding concrete into a bridge or other structure |
| US20140041135A1 (en) * | 2011-08-31 | 2014-02-13 | Marc Breault | Pipeline crossing bridge |
| CN203200644U (en) * | 2013-04-23 | 2013-09-18 | 山东中创集团 | Double-arc-shaped bridge steel structure |
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| 潘寿东: "带副拱中承式菱形变截面钢管混凝土系杆拱桥主拱肋安装技术", 《铁道标准设计》 * |
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