Whole bridge jacking construction method without interrupting traffic

Abstract

The invention discloses a whole bridge jacking construction method without interrupting traffic, which comprises the following steps: blockading unilateral traffic with the road center as the center and changing the other lateral from a one-way road into a two-way road; dismantling paving of the lateral road with the traffic blockaded and pouring a concrete temporary stopper at a position where the paving is dismantled; at the same time, installing a rotary fixed gasbag type steel ladder frame and a floating gasbag type steel ladder frame between the temporary stopper and an approach bridge; jacking a whole bridge synchronously, replacing the floating gasbag type steel ladder frame with a translational motion fixed gasbag type steel ladder frame as a temporary driveway; and using a temporary bearing mound to bear the translational motion fixed gasbag type steel ladder frame when the whole bridge is jacked to a designed height, then backfilling earth and performing compaction with a road roller, and finally laying the paving to recover the traffic at the lateral road. Compared with other jacking technologies, the construction method provided by the invention realizes substantial lifting of a multi-linkage and multi-span bridge without interrupting the traffic of the original driveway, has good social benefits and also widens the engineering scheme for headroom reconstruction of a bridge.

Description

technical field [0001] The invention is mainly used in the field of bridge engineering reinforcement and reconstruction. technical background [0002] The bridge overall synchronous jacking technology is a construction technology that realizes the overall elevation of the upper structure of the cross-line bridge without interrupting the operation of the downlink line. It efficiently and economically solves the The problem of insufficient clearance of the upper-span bridge, and has been widely used. [0003] However, at present, the overall synchronous jacking reconstruction of all channel bridges needs to interrupt the traffic on the bridge, and the interruption time is relatively long. As a key project on the traffic line, the interruption of the traffic of the channel bridge will seriously affect the operation function of the line where it is located. [0004] For important lines such as fully enclosed railways and expressways, the interruption of the channel bridge traf...

AI Technical Summary

Problems solved by technology

This type of method is only applicable to the upper and lower bridges. On the inland waterways in Jiangsu, Zhejiang and Shanghai, the main bridges or approach bridges of a larger part of the bridges are not in this form. At present, there is no systematic discussion and design on this kind of problem in China.

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