Suspender replacement method for tie bar type overpass bridge

Abstract

The invention discloses a suspender replacement method for a tie bar type overpass bridge, which comprises the following steps: exchanging loads for a girder body with a suspender required to be replaced, in a jacking way, and replacing the suspender, wherein in the step of exchanging the loads in a jacking way, a jacking height is firstly calculated, then a temporary support and a jack are arranged, and the girder body is jacked from the bottom up by using the jack, thus, the traditional aloft work mode of slinging from the top is changed, risks are greatly decreased, potential safety hazards are reduced and the work is simpler and more convenient; and in addition, the whole jacking process is monitored and controlled by a computer so that the jacking precision is greatly improved.

Description

technical field [0001] The invention relates to a method for replacing a bridge suspender, and more specifically, to a method for replacing a suspender of a tie rod type flyover bridge. Background technique [0002] see figure 1 As shown, usually, there are the following reasons for the replacement of the suspender 2 of the tie-rod flyover 1: [0003] 1. The suspender 2 has reached the service life or the suspender 2 is corroded, resulting in a decrease in bearing capacity and needs to be replaced normally; [0004] 2. The boom 2 itself has quality problems; [0005] 3. Damage due to overloading. With the development of society, transport vehicles are constantly being updated and the tonnage is gradually increasing, causing the boom 2 or anchor to exceed the design load and cause damage; [0006] 4. The protective cover of the tie-rod flyover bridge 1 was scraped off by a large vehicle, causing the anchorage 3 at the lower end of the suspender 2 to be missing, the suspend...

AI Technical Summary

Problems solved by technology

[0003] 1. The suspender 2 has reached the service life or the suspender 2 is corroded, resulting in a decrease in bearing capacity and needs to be replaced normally;

[0004] 2. The boom 2 itself has quality problems;

[0005] 3. Damage due to overloading. With the development of society, transport vehicles are constantly being updated and the tonnage is gradually increasing, causing the boom 2 or anchor to exceed the design load and cause damage;

[0006] 4. The protective cover of the tie-rod flyover bridge 1 was scraped off by a large vehicle, causing the anchorage 3 at the lower end of the suspender 2 to be missing, the suspender 2 was completely unloaded, and the stress on the beam body 4 changed greatly, which affected the normal operation of the bridge. use poses a threat

Since this method is a high-altitude operation, the risk is high, the cost is high, and there are certain safety hazards

In addition, because both the oil pressure gauge and the level are read manually, there is a disadvantage of poor accuracy (less than 0.1mm)

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