Large-span multi-braced-arched-rib vertical rotation construction method

Abstract

The invention relates to the technical field of bridge construction methods, in particular to a large-span multi-braced-arched-rib vertical rotation construction method. A half-side braced-arched ribis assembled on a rigid beam, the lower end of the half-side braced-arched rib is connected with a rotary hinge on the rigid beam, after assembly is completed, a buckle is installed on the rigid beam,the upper end of a main traction cable is connected with a main jack fixed to the top of the main jack, the lower end of the main traction cable is anchored to a first anchoring point, close to the upper end of the main traction cable, of the half-side braced-arched rib, the upper end of a subsidiary traction cable is connected with a subsidiary jack fixed to the top of the buckle, the lower endof the subsidiary traction cable is anchored to a second anchoring point, close to the lower end of the subsidiary traction cable, of the half-side braced-arched rib, and the main jack and the subsidiary jack are driven to synchronously tension the main traction cable and the subsidiary cable according to the following formulas, so that the lower end of the half-side braced-arched rib rotates upwards around the rotary hinge. The large-span multi-braced-arched-rib vertical rotation construction method is simple, effectively achieves precise adjustment of vertical rotation, improves the stability and safety of vertical rotation construction and has very high popularization value.

Description

technical field [0001] The invention relates to the technical field of bridge construction methods, in particular to a large-span multi-truss arch rib vertical rotation construction method. Background technique [0002] With the rapid development of bridge construction in our country, composite bridge structures have been more and more widely used. The rigid-beam-flexible-arch composite structure makes full use of the mechanical advantages of the arch and the beam. The main permanent load does not cause horizontal thrust on the pier, which improves the mechanical performance of the bridge, effectively reduces the building height of the structure, and reduces the project cost. With the increasing scale of bridges, the rigid beam flexible arch structure is showing the development characteristics of large span and multiple arch ribs. [0003] Rigid girder flexible arch bridge adopts beam first and then arch. After the steel truss girder is erected, arch ribs are assembled on t...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problem that in the existing arch rib vertical rotation construction mentioned in the above background technology, the lifting synchronization of two slings cannot be controlled to affect the safety of the entire arch rib vertical rotation construction, and to provide a large-span multi-truss Arch rib vertical rotation construction method

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