Integral synchronous rotary jacking construction method for small radius horizontal curved bridge

A technology of synchronous rotation and construction method, applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of complicated synchronous rotation jacking process, and achieve the effect of reducing construction difficulty, speeding up construction progress, and improving construction accuracy

Active Publication Date: 2012-10-17
WUHAN BRIDGE SPECIAL TECH CO LTD CHINA RAILWAY MAJOR BRIDGE ENG BUREAU
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Problems solved by technology

[0004] Due to the geometric characteristics of flat and vertical bends on the small-radius flat curve bridge, the overall synchronous rotation and jacking process is extremely complicated

Method used

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  • Integral synchronous rotary jacking construction method for small radius horizontal curved bridge
  • Integral synchronous rotary jacking construction method for small radius horizontal curved bridge
  • Integral synchronous rotary jacking construction method for small radius horizontal curved bridge

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Embodiment Construction

[0060] The present invention will be described in further detail below in conjunction with accompanying drawings and examples.

[0061] The present invention is aimed at small-radius flat-curve bridges. The horizontal projection of the main girder will elongate during the overall synchronous rotation and jacking process, which means that the end of the main girder moves out of the bridge, and at the same time, it is accompanied by the displacement of the transverse bridge. The more critical It is because the jacking displacement of the main girder in the direction of the transverse bridge is not consistent during the rotating jacking process. During the jacking process, it is necessary to control the rotation of the small-radius horizontal curve bridge along the central axis of the main girder (the difference in the jacking displacement of the horizontal bridge), and at the same time pay attention to the longitudinal slip and lateral swing of the main girder to prevent the beam...

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Abstract

The invention relates to an integral synchronous rotary jacking construction method for a small radius horizontal curved bridge, comprising the following steps of: arranging a steel pipe column on a bearing platform to form a pipe pile structure; arranging a longitudinal distributive girder at the girder bottom of a middle pier, and arranging a transverse distributive girder at the girder bottom of a side pier; inversely mounting a jack between the distributive girders and the steel pipe column; mounting a longitudinal limiting device and a transverse limiting device at the high end bridge head of a bridge; mounting a transverse limiting device at the lower end bridge head of the bridge, and prearranging a displacement space between the limiting devices and a girder body according to the transverse displacement value calculated according to the rotating jacking of the small radius plane curve bridge; arranging a hydraulic jacking system, a jacking control system and a stress monitoring system; and carrying out formal jacking after trial jacking is passed. The integral synchronous rotating jacking construction method for the small radius plane curve bridge provided by the invention points out the structure linear change principle during the integral synchronous rotary jacking of the small radius plane curve bridge for the first time, and the complicated successful implementation of the integral synchronous rotary jacking of the small radius plane curve bridge is ensured by adjusting the final construction precision using girder lowering gaps.

Description

technical field [0001] The invention relates to the overall jacking construction of a bridge, in particular to a construction method for the overall synchronous rotary jacking of a flat curve bridge with a small radius. Background technique [0002] With the rapid development of my country's transportation infrastructure construction, many existing bridges need to be raised and lowered to adjust the linear elevation due to many reasons such as road or river upgrades. Considering the actual condition of the bridge comprehensively, it has become a new trend in the field of engineering transformation to use hydraulic equipment to lift the bridge as a whole. [0003] Most of the existing engineering lifting cases are aimed at the overall synchronous jacking of simply supported girders or continuous girder bridges whose flat curves are straight lines. There is no engineering precedent in China, and there are no reference materials for the change law of its jacking line shape. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/06
Inventor 江湧吴运宏国洪光程伊彪王戒躁
Owner WUHAN BRIDGE SPECIAL TECH CO LTD CHINA RAILWAY MAJOR BRIDGE ENG BUREAU
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