Locking device on temporary pier of steel box girder cable-stayed bridge and construction method

Abstract

The invention provides a locking device on a temporary pier of a steel box girder cable-stayed bridge and a construction method.The locking device comprises a jacking device and an elevation adjusting device which are arranged on the upper end face of the temporary pier, and an anchoring box matched with the elevation adjusting device is further arranged on the lower end face of a girder; the elevation adjusting device and the anchoring box are connected through a steel strand. The elevation adjusting device comprises two wedge blocks, wherein the inclined faces of the two wedge blocks make contact with each other, and the two wedge blocks are fixed through a fastener. The problem of timeliness of a traditional steel strand connecting mode is solved, the temporary pier and the main beam are rapidly connected and detached while the advantages of the steel strand are kept, and efficient coordination work of the elevation adjusting device and the jack is achieved; the state that only wind resistance needs to be achieved and the elevation of the main beam does not need to be adjusted can be rapidly converted into the state that the elevation of the main beam needs to be adjusted, and the two states are also conveniently and rapidly removed.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a locking device and a construction method on a temporary pier of a steel box girder cable-stayed bridge. Background technique [0002] At present, with the rapid development of the economy and the intensification of the construction of long-span cable-stayed bridges, according to the statistical results of the completed long-span cable-stayed bridges, it can be found that during the construction of long-span cable-stayed bridges, in order to improve the For the stability of the overall structure and the ability to resist wind and earthquakes, the measures of setting temporary piers are often adopted. The setting of temporary piers can also reduce the unbalanced moment on both sides of the main tower, reduce the length of double cantilever construction, and ensure construction. Safety, speed up construction progress, improve construction accuracy, etc. Th...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a temporary pier locking device and construction method of a steel box girder cable-stayed bridge, so as to solve the problem of quickly connecting the temporary pier with the main girder when there is a need for wind resistance during the construction of the steel box girder cable-stayed bridge, and to realize The technical problem of mutual rapid conversion between the main girder quickly connected to the top of the temporary pier and the function that can adjust the elevation of the main girder and control the force of the temporary pier

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