A method for main tower pull frame of box girder of self-anchored suspension bridge

Abstract

Disclosed is a main tower traction erecting method of a self-anchored suspension bridge box girder. The method is improved on the basis of a traditional incremental launching construction method, a built main tower is utilized as a traction pedestal, the work of additionally constructing an incremental launching pedestal and the incremental launching work of assembling segments and point exchanging can be removed, the main tower is adopted by main tower traction construction as a traction anchorage system, the defects of the incremental launching construction are overcome, the construction amount and the construction cost are reduced, and the construction quality is improved. The main tower traction construction is adopted by the same long-span bridge girders to erect the box girders so that the construction cost can be reduced by about 20%, and the construction period can be reduced by more than 30%. The method overcomes defects and shortcomings existing in the existing box girder incremental launching construction technology, the box girder erecting construction process and partial construction mechanisms are systematically designed, the requirements of the existing engineering are met, and the main tower traction erecting method of the self-anchored suspension bridge box girder is economical and efficient.

Description

technical field [0001] The present invention relates to a main tower pulling frame method of a self-anchored suspension bridge box girder. The method is based on the traditional jacking construction method and improved, and uses the completed main tower beam as a pulling platform, eliminating the need for additional construction The work of pushing the pedestal and the assembling of each segment and changing the point of pushing the work, this method makes the construction of the box girder pushing frame simpler, more efficient, safer and more economical. Background technique [0002] In the construction of box girder erection of long-span self-anchored suspension bridges, most of them adopt the jacking construction method. The jacking construction mechanism mainly includes jacking pedestals, jacking guides and deviation correction devices, welding and assembling platforms, sliding devices, temporary buttresses and guides. beam. [0003] Conventional box girder jacking cons...

AI Technical Summary

Problems solved by technology

[0003] Conventional box girder jacking construction not only needs to build complex and huge reaction pedestals, but also needs to replace the box girder’s jacking force points in each jacking section, and the box girder deviation problem is prone to occur in jacking construction, which increases the complexity. Correction work, which not only reduces the speed of jacking construction, but also increases construction risks and costs

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