Simple and fast method and device for installing adjacent cover girder top box girder with a pier-span gantry crane

Abstract

The invention belongs to a simple and rapid method and device for mounting a box girder at the top of an adjacent bent cap by using a span pier gantry crane. The method comprises the following steps of mounting extended sections at two side ends or one side end of a gantry transverse moving hanging beam of the span pier gantry crane, wherein the lengths of the extended section cover an upper space at one corresponding side end of the adjacent bent cap; laying a sleeper and a track or a raceway on the top surface of the adjacent bent cap; enabling the crane to place an adjacent box girder on a mobile track car or a mobile plate on the top surface of the adjacent bent cap; enabling a hydraulic jack to transversely move each adjacent box girder to a corresponding position on the adjacent bent cap in a simultaneous manner; jacking up two ends of each adjacent box girder by using a hand operated hydraulic jack; and withdrawing the mobile track car, the track and the sleeper. A support is mounted at the lower end of each adjacent box girder to finish the mounting of each adjacent box girder. As the box girder at the top of the adjacent bent cap can be mounted by using one span pier gantry crane, the simple and rapid method and device for mounting the box girder at the top of the adjacent bent cap by using the span pier gantry crane have the advantages of simple and available method and device, high construction speed, time-saving and labor-saving property, low construction cost, good construction quality, good safety and good use effect.

Description

technical field [0001] The invention belongs to a simple and fast method and device for installing a box girder topped by an adjacent cover girder with a pier-span gantry crane. Background technique [0002] During the construction of roads, railways or bridge sections, some areas are not suitable for laying box girders on top of cover beams with bridge erecting machines. However, the cross-pier gantry crane has a wide range of applications, low construction cost and high speed. However, the cross-pier gantry crane can only hoist and lay the box girder at the lower end, and the laying surface is narrow. For example: the Jinghe Super Bridge on the East Road of Jinghe Xincheng County, Xixian New District has a total length of 1303 meters and a total of 36 spans, of which the third link (9-11 spans), the seventh and eighth links (26-33 spans) use a 50m span , and the rest adopt 30m span. In order to ensure the simultaneous construction of the installation of the 30-meter box...

AI Technical Summary

Problems solved by technology

Since the 30m box girder erecting machine has not been erected from the first span to the eighth (25th) span, generally two 200T truck cranes are used to install the left box girder, but this method has slow progress and high cost Higher, no security guarantee and many other disadvantages

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