RU2386744C1 - Method for bridge erection - Google Patents

Abstract

FIELD: construction, road engineering. ^ SUBSTANCE: invention is related to bridge engineering and may be used in method for erection of bridge, which consists in mounting of the first span, installation of special bridge construction equipment on it, erection of pile abutment with its help and further mounting of further span with support against erected pile abutment. The novelty is the fact that previously building berth is arranged, on which span is assembled, at the end of the first block of span technological round holes are arranged, diametre of which exceeds diametre of pile abutments casing pipes. Then in cross section of technological holes in upper and lower levels of span there are yokes arranged, afterwards span is moved forward into the first span until axes of technological holes match axis of the first support. Pipe stands are installed in technological holes, pressed by upper yokes and welded to each other, and then pipe stands are swaged down at the depth of 2-4 m (depending on type of soil), pipe stand is cut to design level and pressed with lower yoke, after that special equipment - drilling tool - is installed at the end of span cantilever, casing pipes are submerged into pipe stands, wells are drilled to design depth, reinforcement frame is lowered in them, and well together with pip stands is concreted, then pipe stand is released from yokes, span is shifted back, thus opening space over concreted pipe stands, cross links are mounted between pipe stands, besides upper spacer of links is at the same time the bearing beam of rolling devices for longitudinal launching of span, and concreted. ^ EFFECT: development of efficient method for bridge erection. ^ 2 cl, 13 dwg

Description

The invention relates to bridge construction and can be used in the construction of bridges in remote places with difficult terrain, for example, in mountainous areas or in areas with special environmental requirements.

There is a known method of constructing a bridge, which consists in installing the first span, installing special bridge-building equipment on the console of the first span, erecting a pile support with its help, after which the next span with a support on the pile support was mounted, then the special bridge-building equipment was moved to the next span, constructed the next pile support and the installation process was repeated until the construction of the bridge / 1 /.

The disadvantage of this method is the need for complex bridge-building equipment, equipped with a console, equipped with a pile driver or screw-driving device. In addition, the console has a limited length (~ 10 m), which prevents the use of spans of greater length.

The present invention is to reduce the cost of building a bridge and expanding technological capabilities in the construction of pile supports.

The problem is solved due to the fact that in the method of constructing the bridge, which consists in installing the first span, installing special bridge-building equipment on it, erecting the pile support with it and then installing the next span with the support on the erected pile support, pre-erect the mounting jig on which the span is assembled, technological circular holes are made at the end of the first span block, the diameter of which exceeds the diameter of the casing piles of pile supports, clamps are installed in the alignment of technological holes in the upper and lower levels of the span, then the span is pushed into the first span until the axes of the technological holes coincide with the axis of the first support, then pipe racks are installed through the technological holes, clamping them with the upper clamps and welding among themselves, after which the pipe-racks are upset to a depth of 2-4 m (depending on the type of soil), the pipe-rack is cut to the design level and clamped with a lower clamp, then at the end of the console the flight structure install special equipment - the drilling unit, lower the casing pipes into the racks, drill the wells to the design depth, lower the reinforcing cage into them and concreting the well and the racks, then release the pipe from the clamps, move the span back, opening the space above the concreted pipe-racks, mount the transverse connections between the pipe-racks, and the upper strut ties at the same time is the supporting beam of the transfer devices for longitudinal on vizhki superstructure, and concreted podfermenniki mounted support portions, then lowered onto the superstructure perekatochnye apparatus and is moved to the next span to match the axes of the technological orifices with the axis following the intermediate support, after which the process is repeated bridge structures.

The bridge construction method also provides that the console is unloaded before sliding the span into the next span by moving special equipment (cranes, drilling rigs) to the previous span and reinforcing the console by placing the sprengel in the impending span.

The invention is illustrated by drawings, where:

- figure 1 depicts an impending span reinforced with a truss and equipped on the console with technological holes;

- figure 2 shows the installation of the first section of the pipe racks and clamps;

- figure 3 shows the installation of the second section of the pipe racks;

- figure 4 shows the immersion of pipe racks in the ground;

- figure 5 shows the installation of casing pipes in the pipe-rack;

- figure 6 shows the drilling unit with the casing lowered to the ground level to the design level;

- figure 7 shows the drilling of a well with lowering the casing;

- Fig 8 shows the installation of the reinforcing cage in the casing;

- figure 9 shows the concreting of the well and pipe-rack with the simultaneous extraction of casing;

- figure 10 shows the felling of a loose concrete layer;

- figure 11 shows a section of pipe racks to the design elevation;

- Fig.12 shows the installation of the transverse connections of pipe racks;

- Fig.13 shows the shift of the span in the opposite direction.

The bridge construction method involves the construction of an assembly slip (not shown) and the collection of span blocks 1 on it in a single lash. At the end of the first block, technological circular holes 2 are made, the diameter of which exceeds the diameter of the pipe-racks of the pile supports 3. The span structure 1 reinforced with the spreader 4 is advanced into the first span until the axis of the technological holes coincides with the axis of the next support. In the alignment of the technological holes 2, clamps 5 are installed in the upper and lower levels of the span 5. On the console of the span 1, an installation crane 6 is started and pipe-racks 7 are brought.

Through the technological holes 2, the crane 6 starts the pipe-racks 7, clamp them with clamps 5 and weld together. The process continues until the welded pipe-rack 7 sits on the ground 8. The pipe-rack 7 is immersed, for example with the help of a vibrator 9, to a depth of 2-4 m, depending on the properties of the soil. The vibro-loader is dismantled, and the pipe-rack 7 is cut to the design level and clamped with the lower clamp 5.

At the end of the span console 1, the drilling assembly 10 is pulled out. With a crane 6, the casing 11 is lowered into the rack-pipe and the well is drilled to the design depth with excavation and its removal along the span 1. Inside the casing 11, the reinforcing cage 12 is lowered and concreted wells and pipe-racks 7 with simultaneous extraction of the casing 11. The upper layer of loose concrete 13 is cut off, and the metal pipe-rack 7 is repeatedly cut to the design level.

After that, pushing devices (not shown), the span 1 is shifted to the side opposite to the slide so that it is possible to freely perform work in the area of the ends of the pipe-racks 7.

From the suspension scaffolds 14, work is carried out on the installation of transverse connections 15 between the upright tubes 7. The upper strut 16 of the connections 15 is at the same time a load-bearing beam onto which the transfer devices 17 are installed for longitudinal sliding and for the future lowering of the thrown span on the supporting parts. Then concreting of the sub-fermenters 18 is carried out and the supporting parts 19 are installed. Suspension scaffolds 14 are raised to the transport position, which does not interfere with further sliding of the span 1. To completely eliminate the deflection of the end of the console, all equipment (crane 6, drilling rig 10) and other temporary loads are moved to the adjacent span, after which the slide of the span structure 1 into the next span of the bridge begins. Next, the process of erecting the next pile support 3 is repeated.

The source of information

1. A.S. USSR No. 383771, class E01D 21/00, priority dated July 15, 1970

Claims (2)

1. The method of construction of the bridge, which consists in installing the first span, installing special bridge-building equipment on it, erecting a pile support with its help and then installing the next span with the support on the erected pile support, characterized in that the mounting frame is preliminarily erected, on which spans are assembled, technological circular holes are made at the end of the first span block, the diameter of which exceeds the diameter of the casing pipes of pile supports, clamps are poured in the alignment of the technological holes in the upper and lower levels of the span, then the span is pushed into the first span until the axes of the technological holes coincide with the axis of the first support, after which pipe racks are installed through the technological holes, clamping them with the upper clamps and welding together, and then the pipe-racks are upset to a depth of 2-4 m (depending on the type of soil), the pipe-rack is cut to the design level and clamped with a lower clamp, after which it is installed on the end of the span console special equipment is poured in - a drilling unit, casing pipes are lowered into racks, wells are drilled to the design depth, the reinforcing cage is lowered into them and the borehole and rack pipes are concreted, then the pipe rack is freed from the clamps, the span is moved back to open the space over concreted pipe-racks, cross-links between pipe-racks are mounted, and the upper strut of ties is simultaneously the supporting beam of the transfer devices for longitudinal sliding of the span Ie, concenders are concreted and the supporting parts are installed, after which the span is lowered onto the transfer devices and moved to the next span until the axes of the technological holes coincide with the axis of the next intermediate support, after which the process of constructing the bridge is repeated. 2. The method of constructing a bridge according to claim 1, characterized in that before sliding the span into the next span, the console is unloaded by moving special equipment (cranes, a drilling rig) to the previous span and reinforcing the console by placing a sprengel in the impending span.

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