Longitudinal beam and arch rib forming control device of steel arch bridge

Abstract

According to the forming control device for the longitudinal beam and the arch rib of the steel arch bridge, the displacement and the downward pressure of the longitudinal beam can be accurately and efficiently monitored through the longitudinal beam displacement and downward pressure monitoring device, and meanwhile the displacement and the downward pressure of the arch rib can be accurately and efficiently monitored through the arch rib displacement and downward pressure monitoring device; the dismantling time of the temporary supporting system is accurately controlled, and harmful internal force generated by the arch rib can be accurately controlled and avoided. The construction of a beam-first and arch-second method can be met, segmental hoisting construction of the arch ribs and the longitudinal beams is achieved, and the construction efficiency is improved.

Description

technical field [0001] The invention relates to a control device for forming longitudinal girders and arch ribs of a steel arch bridge. Background technique [0002] The under-supported tied arch bridge structure has great advantages in steel structure bridges. It combines arch ribs and longitudinal girders to bear the load together, and combines the structural performance of beams under bending and arch compression, which can avoid damage caused by horizontal forces. Larger, set the cap with too large rigidity. [0003] In the construction of the under-connected tied steel arch bridge, the longitudinal beam first and then the arch rib method can be used for construction, but for long-span tied arch bridges, it is necessary to add temporary supports when using the longitudinal beam first and then the arch rib method. The construction will be carried out in sections. After the construction of the steel arch bridge is completed, the temporary supports will be removed, and the...

AI Technical Summary

Problems solved by technology

[0006] 1) Manual observation of the distance between the arch rib and the longitudinal beam from the temporary support requires workers to climb multiple temporary support frames, which is time-consuming and laborious;

[0007] 2) During the process of the arch ribs and longitudinal beams detaching from the temporary support, multiple arch ribs and longitudinal beams that are far away from each other simultaneously displace, and the manual observation results are not timely. The distance is adjusted multiple times, which is not efficient;

[0008] 3) Temporary support for manual climbing, there are potential safety hazards for high-altitude operations

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