Top pushing mechanism of steel box girder of single longitudinal clapboard on wide bridge deck and top pushing method

Abstract

The invention discloses a top pushing mechanism of a steel box girder of a single longitudinal clapboard on a wide bridge deck and a top pushing method, which is characterized in that the top pushing mechanism comprises a main top pushing mechanism and two auxiliary traction mechanisms, wherein the two auxiliary traction mechanisms are respectively arranged in the lower bevel board ends of steel box girders at two sides; the main top pushing mechanism is provided with a longitudinal main slideway which is supported on a central buttress platform; a top pushing jack is fixedly arranged on the central buttress platform; one end of a main traction rope is connected to the top pushing jack and the other end thereof is connected to the tail end of each sectional steel box girder by an anchor-pulling device; the bottom of the central buttress platform is provided with a top lifting jack and a steel buttress which can be additionally provided with an adjusting cushion block and is used for adjusting the supporting height of the central buttress platform; and the auxiliary traction mechanisms are characterized in that two buttress platforms at the two sides are respectively provided with a lateral limit palate and a bottom auxiliary slideway corresponding to the lower bevel boards of the steel box girders at the two sides, and the end parts of the lower bevel boards at the two sides of the steel box girder are provided with the auxiliary traction ropes. The steel box girder of the invention has definite stress and can ensure top pushing quality of the steel box girder and cable shape of a bridge.

Description

technical field [0001] The invention relates to a jacking mechanism and a jacking method for a steel box girder with a wide bridge deck, and more specifically to a jacking mechanism and a jacking method for a steel box girder with a wide bridge deck during jacking construction. Background technique [0002] In the construction of steel bridges, the steel box girder is often constructed by multi-point continuous jacking, and the steel box girder is dragged by jacking jacks to finally complete the installation of the steel box girder. [0003] The current steel box girder jacking mechanism is set to more than two jacking slides according to the number of longitudinal diaphragms in the design section of the steel box girder, and there is no jacking limit device and vertical elevation adjustment device. However, in some steel box girder jacking constructions, the steel box girder is designed as a single longitudinal diaphragm and there is a vertical curve in the bridge. , which...

AI Technical Summary

Problems solved by technology

However, in some steel box girder jacking constructions, the steel box girder is designed as a single longitudinal diaphragm and there is a vertical curve in the bridge. , which will not only affect the stress of the steel box girder, increase the construction cost, but also fail to meet the requirements of the designed bridge

[0004] For example, the Shuangyong Bridge in Liuzhou City, Guangxi, the steel box girder of the main bridge is a single longitudinal diaphragm with a vertical curve, and it is constructed by jacking. It is difficult to ensure that the steel box girder is well stressed and bridge-shaped

For this kind of single jacking slideway jacking, the jacking mechanism that can adjust the elevation of the steel box girder and limit the position of the steel box girder during the jacking process, there is no related public report in the prior art

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