Installation construction method for bridge rigid hinge

Abstract

The invention discloses an installation method for a bridge rigid hinge and belongs to the technical field of bridge construction. The installation construction method for the bridge rigid hinge includes the steps that firstly, combination and assembling are performed in advance, a running-in test is performed, and accessories are installed; secondly, preparation is performed before hoisting; thirdly, a small box girder is temporarily locked into a J2 kind end beam; fourthly, synchronous hoisting is in place, entering a preset closure gap position is achieved, and adjustment is performed properly; fifthly, a temporary locking device is installed, temporary locking is relieved, the small box girder is moved close to a J1 beam segment fixing end, and a bolt is used for connection; sixthly, a closure seam of a J2 beam segment and a J3 beam segment is forcefully adjusted, temporary fixing accessories are temporarily fixedly combined and installed, construction site connection of the J2 beam segment and the J3 beam segment is finished, and a beam is installed on the J2 beam segment; seventhly, remained facilities are installed, temporary facilities are detached, and rigid hinge supports on the periphery of the small box girder are adjusted. According to the installation method for the bridge rigid hinge, the rigid hinge and parts of the rigid hinge can be accurately and inerrably installed, the rigid hinge and a bridge are stable in structure, and safety and reliability in using the rigid hinge and the bridge are ensured.

Description

technical field [0001] The invention relates to bridge installation technology, in particular to a rigid hinge installation technology used on bridges. Background technique [0002] In my country, the continuous length of the main girder of the bridge is more than 2680m, and it is a cable-stayed bridge with more than six pylons. One of the main difficulties in its structural system is that the overall stiffness of the multi-tower cable-stayed bridge is small. In order to solve the above problems, the main beam adopts a structural system in which vertical supports are set at a distance of 46m on both sides of the cable tower to improve structural rigidity, and X brackets are installed at each cable tower. The second difficulty of the structural system is that the total length of the main girder reaches more than 2680m, and the temperature deformation of the main girder has a great influence on the stress of the cable tower and the foundation. The height of the tower and the ...

AI Technical Summary

Problems solved by technology

[0010] Due to the long length of the steel box girder, the temperature change of the main girder has a great influence on the force of the cable tower and the foundation. The traditional structure cannot adapt to this long main girder structure system and the special construction environment of the Jiashao Bridge. To solve the problem of beam temperature change, Jiashao Bridge adopts an innovative structural system with two main girders and a rigid hinge device at the middle of the bridge span

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