The Repairing Method of Bridge Modular Expansion Joint

A repair method and technology for expansion joints, applied in the field of expansion joint repairs, can solve problems such as poor economy, difficult maintenance, and increased maintenance costs, and achieve the effects of alleviating traffic pressure on bridge decks, reducing dust emissions, and improving repair efficiency

Active Publication Date: 2021-05-25
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. 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 increases the traffic pressure and safety hazards on the bridge deck, and increases the maintenance cost, which is economical.

Method used

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  • The Repairing Method of Bridge Modular Expansion Joint
  • The Repairing Method of Bridge Modular Expansion Joint
  • The Repairing Method of Bridge Modular Expansion Joint

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: Fix the fixture of the section steel tooling 5 equipped with the rail cutting machine on the center beam 1, cut off and remove 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 member 25 is arranged symmetrica...

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 location of the damaged expansion joint, mark the position where the expansion joint needs to be replaced, use a concrete 7 cutting machine to cut the joint, and use a rock drill to chisel out the concrete 7;

[0073] Step 2: Fix the steel fixture 5 fixture installed with the rail cutting machine on the middle beam 1, cut and remove the side beam 2 and the middle beam 1 corresponding to the damaged expansion joint through 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 expansion joint installation according to the actual size of the pre-embedded steel bar 6.

[00...

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Abstract

The invention relates to a repairing method for modular expansion joints of bridges. Before construction, the expansion joints are pre-constructed to carry out structural survey to determine the damage of the expansion joints to select a corresponding repairing method, including the following situations: 1. Damage to the middle beam , the expansion box is not damaged; 2, the middle beam is not damaged, the expansion box is damaged; 3, some expansion joints are damaged. In view of the above-mentioned damages, the present invention adopts the method of partial repair, which does not need to replace the entire expansion joint, but only needs to carry out partial repair or partial replacement of the damaged part. On the premise of ensuring the integrity and service life of the expansion joint, it saves costs and improves Repair efficiency, save construction time, and achieve rapid opening to traffic. Moreover, during the restoration construction, only a certain traffic lane is closed for maintenance, which relieves the traffic pressure on the bridge deck and reduces potential safety hazards.

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 driving by timely maintenance and repair work during the use period 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 repla...

Claims

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Application Information

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Patent Type & Authority Patents(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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