Bridge modular expansion joint repairing method

A repair method and technology for expansion joints, applied in the field of expansion joint repairs, can solve the problems of poor economy, difficult maintenance, time-consuming and manpower consumption, etc., so as to relieve the traffic pressure on the bridge deck, reduce dust emissions, and save construction time Effect

Active Publication Date: 2020-05-08
湖北鄂东长江公路大桥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are the following disadvantages in the maintenance of expansion joints: 1. It is difficult to maintain. The construction needs to chisel away the concrete on both sides of the expansion joints on the road surface. Before maintenance, it is necessary to open grooves, remove garbage, and then replace and pour concrete. It takes a lot of time and manpower, and the garbage will cause environmental pollution
2. The entire expansion joint needs to be replaced, which will increase the traffic pressure and safety hazards on the bridge deck, and increase the maintenance cost, which is economical.

Method used

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  • Bridge modular expansion joint repairing method
  • Bridge modular expansion joint repairing method
  • Bridge modular expansion joint repairing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1. The center beam 1 is damaged, but the telescopic box 3 is not damaged

[0052] Wherein, the damage of the central sill 1 is generally broken or deformed.

[0053] Step 1: Locate the damaged position of the central sill 1 and determine the cutting area; specifically, use a ruler to measure the parallelism between the central sill 1 and the road surface, and the non-parallel part is the damaged position of the central sill 1.

[0054] Step 2, fixing the profiled steel tooling 5 clamps equipped with the rail cutting machine on the center beam 1, cutting off and removing the broken center beam 1 by the rail cutting machine.

[0055] Step three, such as Figure 5 As shown, a notch is formed at the excised center beam 1, and the bottom of the side beam 2 corresponding to the notch is respectively welded with a first mounting part 25 and a second mounting part 26, wherein the first mounting part 25 is installed in the first The center of the piece 25 is arranged symmetric...

Embodiment 2

[0061] 2. The center beam 1 is not damaged, but the telescopic box 3 is damaged

[0062] Wherein, the damage of telescopic box 3 is generally that the upper support 32 and the lower support 33 are severely damaged or fall off.

[0063] Step 1, locate the position of the damaged telescopic box 3, draw a line on the upper edge of the telescopic box 3 loam cake 31, use a concrete 7 cutter to cut the seam, and use a rock drill to chisel away the concrete 7 above the telescopic box 3 loam cake 31. As shown in Figure 6(a).

[0064] Step 2, as shown in Figure 6(b), the upper cover 31 corresponding to the damaged area of ​​the telescopic box 3 is cut, as Figure 6(c) , 6(d) As shown, use the crowbar 4 to prop up the upper area of ​​the telescopic box 3, take out the damaged upper support 32 or directly install a new upper support 32, use the tooling 5 to take out the damaged lower support 33 or directly install a new lower support 33 . Wherein, the frock 5 includes a cross arm 28 ...

Embodiment 3

[0071] 3. Some expansion joints are damaged

[0072] Step 1, locate the position of the damaged expansion joint, mark the position where the expansion joint needs to be replaced, use the concrete 7 cutting machine to cut the seam, and use the rock drill to remove the concrete 7;

[0073] Step 2, fixing the profiled steel tooling 5 clamps equipped with a rail cutting machine on the middle beam 1, cutting and removing the side beams 2 and the middle beam 1 corresponding to the damaged expansion joints by the rail cutting machine;

[0074] Step 3: Hoist the new expansion joint to the removal site, butt and weld it with the original expansion joint.

[0075] Specifically, when the new expansion joint is welded and installed with the original expansion joint, attention should be paid to:

[0076] (1) Arrange the pre-embedded steel bar 6 to make it smooth, and determine the detailed plan for the installation of expansion joints according to the actual size of the pre-embedded steel...

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Abstract

The invention relates to a bridge modular expansion joint repairing method. Structural investigation is performed on an expansion joint in advance before construction, and the damage condition of theexpansion joint is determined so as to select a corresponding repairing method. The damage comprises the following conditions: 1, a middle beam is damaged and an expansion box is not damaged; 2, the middle beam is not damaged, and the expansion box is damaged; 3, partial expansion joint is damaged. Aiming at the damage condition, a local repairing method is adopted, the whole expansion joint doesnot need to be replaced, only the damaged part needs to be locally repaired or locally replaced, and on the premise that the integrity and the service life of the expansion joint are guaranteed, the cost is saved, the repairing efficiency is improved, the construction time is saved, and rapid traffic restoration is achieved. During repair construction, only one traffic lane is closed for maintenance, so that the traffic pressure of the bridge floor is relieved, and potential safety hazards are reduced.

Description

technical field [0001] The invention relates to the technical field of expansion joint maintenance, in particular to a repair method for bridge modular expansion joints. Background technique [0002] Expansion joints are one of the important components of the bridge structure. It is of great significance to ensure the stability of the bridge structure and ensure the safety of traffic by timely maintenance and repair work during use and maintaining the overall integrity of the expansion joints. [0003] At present, there are the following disadvantages in the maintenance of expansion joints: 1. Maintenance is difficult. The construction needs to chisel out the concrete on both sides of the expansion joints on the road surface. Before maintenance, it is necessary to open grooves, remove garbage, and then replace and pour concrete. It takes a lot of time and manpower, and the garbage will cause environmental pollution. 2. The entire expansion joint needs to be replaced, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00
CPCE01D22/00
Inventor 宋建军黄冰释余俊林王勇陈鑫田欣赵层王鲁鲁
Owner 湖北鄂东长江公路大桥有限公司
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