Bridge jacking system

Abstract

The invention discloses a bridge jacking system. The bridge jacking system eliminates the compression amount of a steel supporting system at any time through alternate circulative jacking of jack sets, when any one of the jack sets releases pressure, another jack set begins to conduct cylinder stretching jacking, in this way, the problem of altitude difference among supporting points is solved, sothat the displacement of a beam body is in a controllable state. Under each set of supporting states, the compression amount of the supporting system hardly changes, so that the internal force in thebeam body hardly changes, the safety of heavy goods on the upper portion is ensured effectively, and accordingly the structural safety in the jacking process is ensured effectively. The bridge structure being jacked can achieve jacking up, gradient variation, descending and rectifying and the effect that the utilization function of the bridge structure is not reduced after reaching jacking-up according to a program people anticipate.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a bridge jacking system. Background technique [0002] During the bridge construction process, for the jacking of continuous girder bridges, it is necessary to control the displacement difference at each pier position (at the apex). With the conventionally configured gap protection system, when the jack is switched to the temporary support during the jacking process, due to the support steel pipe Due to compression deformation and connection gaps, the upper beam body will also sink with the retraction of the jack, and the sinking amount is uncontrollable, that is, the displacement difference of each pier position is also difficult to control, which will generate a large additional stress on the beam body. Therefore, Effective measures need to be taken to ensure the control of the fulcrum displacement during the entire jacking process. [0003] The traditional continuo...

AI Technical Summary

Problems solved by technology

[0002] During the bridge construction process, for the jacking of continuous girder bridges, it is necessary to control the displacement difference at each pier position (at the apex). With the conventionally configured gap protection system, when the jack is switched to the temporary support during the jacking process, due to the support steel pipe Due to compression deformation and connection gaps, the upper beam body will also sink with the retraction of the jack, and the sinking amount is uncontrollable, that is, the displacement difference of each pier position is also difficult to control, which will generate a large additional stress on the beam body. Therefore, Effective measures need to be taken to ensure the control of the fulcrum displacement during the entire jacking process

[0003] The traditional continuous girder bridge jacking construction is difficult to solve the compression of the steel support system system of the steel support pad, such as the sudden failure of the jack, which will cause unsafe hazards in the jacking system and the upper structure

Images