Demolition method of double curved arch bridge

Abstract

The invention discloses a method for dismantling a double-curved arch bridge, which comprises the following steps: 1) dismantling the arch bridge structure except the main arch ring; 2) building a supporting structure directly under the main arch ring; 3) building between the arch rib and the supporting structure Install support jacks at intervals; 4) Adjust the thrust of the two symmetrical support jacks so that the axial pressure value of the arch rib vault section is less than or equal to the set balance target value; arch wave; 6) Drill a hole at the vault position of the arch rib, install a pressure jack in the hole, and adjust the thrust of the pressure jack to be equal to the axial pressure value of the arch rib vault section; 8) split the arch feet of the two arch ribs located on both lateral sides of the bridge, and use hoisting equipment to lift them away; 9) cycle step 5) to step 8), and remove all the arch ribs of the arch bridge in turn; 10) Remove the construction equipment and supporting structures, and complete the demolition of the double-curvature arch bridge.

Description

technical field [0001] The invention belongs to the technical field of methods and equipment for dismantling bridges, in particular to a method for dismantling double-curved arch bridges. Background technique [0002] A double-curved arch bridge is a form of arch bridge whose shape is curved in both vertical and horizontal directions. It usually consists of arch ribs, arch waves, arch slabs, horizontal joint members and arch buildings. Since the 1960s, double-curved arch bridges have been widely adopted all over the country. However, after decades of use, except for a small number of double-curved arch bridges that can meet the current traffic requirements through reinforcement, most of them have become dangerous bridges due to low load levels and overdue service, with cracks and concrete weathering in varying degrees. , no maintenance value, must be demolished and rebuilt in road reconstruction. [0003] During the demolition process of double-curved arch bridges, collap...

AI Technical Summary

Problems solved by technology

[0008] In view of this, the object of the present invention is to provide a method for dismantling a double-curved arch bridge, which can effectively solve the problem of excessive pressure on the vault during the arching process and improve the demolition efficiency

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