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Support-free construction method of steel-concrete concrete composite beam concrete cast-in-place bridge deck

A technology of steel-concrete composite beams and construction methods, which is applied to bridges, bridge parts, bridge materials, etc., and can solve problems such as high safety risks, high costs, and increased demolition workload

Pending Publication Date: 2020-09-04
CCCC SHEC SECOND ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a steel-concrete composite beam concrete cast-in-place bridge deck construction method without support. The first purpose is to overcome the problem that the support in the prior art needs to be removed after the bridge deck construction is completed, which increases the workload of the demolition; the second purpose It is to overcome the problem that the demolition operation of the construction support in the prior art needs to be carried out at high altitude, the safety risk is large, and the dismantling operation platform needs to be built, and the cost is high

Method used

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  • Support-free construction method of steel-concrete concrete composite beam concrete cast-in-place bridge deck
  • Support-free construction method of steel-concrete concrete composite beam concrete cast-in-place bridge deck
  • Support-free construction method of steel-concrete concrete composite beam concrete cast-in-place bridge deck

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Experimental program
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Effect test

Embodiment 1

[0036] Such as Figure 1-3 As shown, a steel-concrete composite beam concrete cast-in-place bridge deck construction method without supports, including the following steps:

[0037] 1) Install steel girder 1 and steel beam 2 according to the requirements of the drawings, and process the required profiled steel plate 3 according to the horizontal line shape of the bottom surface of the bridge deck;

[0038] 2) Lay the processed profiled steel plates 3 section by section on the upper flange plate of the steel girder 1 along the direction of the bridge; the profiled steel plates 3 of each section are connected by lap joints, undercut connections, or snap connections;

[0039] 3) install the steel bars in the bridge deck on the profiled steel plate 3 laid in step 2);

[0040] 4) Install side forms on both sides of the bridge deck;

[0041] 5) Concrete is poured on the top of the profiled steel plate 3 in step 2) and inside the side form in step 3) and maintained.

[0042] The p...

Embodiment 2

[0044] On the basis of Example 1, the profiled steel plate 3 includes an open profiled steel plate, a closed profiled steel plate, and a combined profiled steel plate. The combined profiled steel plate includes a bottom plate 4 and a steel bar truss 5, and the bottom plate 4 The steel bar truss 5 is connected to the top, and the bottom plate 4 is one of an open profiled steel plate, a closed profiled steel plate or a thin steel plate. The bottom plate 4 and the steel truss 5 are connected by threaded tie rods, bolts or welding;

[0045] When the profiled steel plate 3 is an open profiled steel plate, the open profiled steel plate is used as the bottom mold and load-bearing structure of the concrete bridge deck to realize construction without support; the open profiled steel plate is made of stainless steel plate or painted to meet the specification requirements The surface-coated steel plate realizes the construction without dismantling the bottom formwork; compared with the c...

Embodiment 3

[0047] On the basis of embodiment 2, when the profiled steel plate 3 is a closed profiled steel plate, the closed profiled steel plate is used as the bottom form and load-bearing structure of the concrete bridge deck to realize construction without support; the closed profiled steel plate uses The bottom surface of the bridge deck is flat, which is conducive to reducing the difficulty of demolition construction.

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Abstract

The invention belongs to the technical field of bridge construction, and particularly provides a support-free construction method of a steel-concrete composite beam concrete cast-in-place bridge deck.The method comprises the following steps of installing steel main beams and steel cross beams according to drawing requirements, and machining needed profiled steel plates or steel plates according to a transverse line type of a bottom surface of a bridge deck; laying processed profiled steel plates on an upper flange plate of the steel main beams section by section in a bridge direction; installing reinforcing steel bars in the bridge deck on the laid profiled steel plates; installing side molds on the two sides of the bridge deck; and pouring concrete on the profiled steel plates and on inner sides of side molds in the step 3) and curing. Problems that in the prior art, supports and formworks need to be disassembled after bridge deck construction is completed in support construction, and a disassembling workload is large are solved; and support-free construction is adopted, dismounting operation is not needed, high-altitude operation is not needed, a safety risk is reduced, a dismounting operation platform does not need to be built, construction cost is reduced, and construction efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of bridge deck construction, and in particular relates to a construction method for a steel-concrete composite beam concrete cast-in-place bridge deck without supports. Background technique [0002] As an important part of the bridge structure, the bridge deck installation in the steel-concrete composite beam has an important influence on the traffic capacity of the road. With the development of bridge construction in our country, the research on bridge deck construction technology has gradually been paid attention to, and extensive and in-depth research has been carried out gradually. [0003] Steel plate composite girder bridges, especially steel plate girder bridges whose steel girders are composed of three I-shaped main girders and cross girders. Multiple main girders are arranged vertically at intervals. Due to its simple and regular structure, strong standardization and regularity, it is more and more ...

Claims

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Application Information

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IPC IPC(8): E01D21/00E01D19/12E01D101/24E01D101/30
CPCE01D19/125E01D21/00E01D2101/24E01D2101/30
Inventor 丁亚辉李欣沈冲黄阳林刘和能
Owner CCCC SHEC SECOND ENG
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