Construction method for continuous tie bar steel tube arch bridge

Abstract

The invention relates to a bridge construction method, in particular to a construction method for a continuous tie bar steel tube arch bridge; the construction method aims at solving the problems that the construction cycle is long, the potential safety hazard is big, the construction difficulty is big, and the like by adopting the existing support method. The construction method comprises the following steps of performing construction on assembling supports for a steel tube arch; processing the steel tube arch by stages, and hoisting the steel tube arch onto the assembling supports; installing temporary abutment supports and opposite-pull steel stranded wires to enable the steel tube arch to form a bowstring whole bearing structure; supporting the steel tube arch by the temporary abutment supports instead of the assembling supports, and removing the whole assembling supports; installing a longitudinal movement pushing system for the steel tube arch to enable the steel tube arch to move forward; welding the steel tube arch after the steel tube arch are pushed in place. Firstly, The difficult problem that the safety risk is big due to the fact that the pushing distance is far and the steel tube arch needs to cross the existing railways and highways after the steel tube arch is assembled is solved; secondly, the problem that arch feet are low in installation accuracy is solved, so that the linearity and design linearity of the whole steel tube arch are enabled to be consistent, and the stress state and the design state of the steel tube arch are finally enabled to be consistent; thirdly, the stress state and the design state of a beam body are consistent, so the construction quality is finally guaranteed.

Description

technical field [0001] The invention relates to a bridge construction method, in particular to a construction method of a continuous tie rod steel pipe arch bridge. Background technique [0002] In the construction process of the continuous tied arch bridge of the super large railway bridge, the combined structure of prestressed concrete continuous beam and steel tube concrete arch is often encountered, or the construction of passenger continuous steel tube arch bridge with many beam spans or spanning existing lines and rivers Working conditions, for this kind of steel pipe arch construction, bridge installation methods include bracket method, cantilever method, jacking method, swivel method, etc. The hoisting equipment is installed in sections, and then welded into a whole with welding equipment. The assembly bracket, hoisting equipment, and high-altitude welding work all need to be constructed on the upper part of the continuous beam body, but the railway under the beam bo...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a construction method for continuous steel pipe arch bridges in order to solve the problems such as long construction period, large potential safety hazards and relatively difficult construction in the existing steel pipe arch bridge construction using the support method.

Images