Lifting method for frame bridge box body

Abstract

A lifting method for a frame bridge box body comprises the steps of carrying out joint cleaning on settlement joints in a picking mode, then using a water drill to drill holes downwards at the positions and injecting grout to separate U-shaped grooves from the box body; forming grout stopping walls in soil bodies at the positions of the front end and the rear end of the box body; forming a plurality of reinforcing holes, lifting holes and complementary holes in the rear portion, the front portion and the middle of a bottom plate of the box body respectively; utilizing a grout injecting machine to carry out grouting operation on the holes and the like. By means of the lifting method for the frame bridge box body, approaches on the two sides of the box body are not needed to be disassembled, and the use amount of cement is saved by 20% compared with an existing method so that the construction cost can be greatly reduced, the construction period can be shortened, and the construction difficulty can further be reduced. Meanwhile, the lifting method for the frame bridge box body has the advantages of being high in operation performance and safety performance and the like, and has remarkable advancement and practicality.

Description

technical field [0001] The invention belongs to the technical field of railway facility construction, in particular to a method for lifting a box body of a frame bridge. technical background [0002] With the rapid development of urban construction, the traffic volume is also increasing. When the existing railway crosses the highway, it is common practice to build a frame bridge under the existing railway to alleviate the traffic congestion caused by the railway line passing through the city. When some frame bridges cannot meet the traffic requirements due to their long service life or too small internal width, it is necessary to replace the old frame bridges with new ones. The commonly used replacement method at present is the jacking method. This method is to remove the old frame bridge and dig out the soil below the bridge while using a jack to lift one or more sections of the box body that constitutes the main body of the frame bridge from the side of the existing railw...

AI Technical Summary

Problems solved by technology

However, this existing construction method has the following problems: if the approach roads on both sides of the box body have been constructed, the grouting operation can only be carried out after the U-shaped grooves on both sides have been chiseled, otherwise the construction cannot be carried out , resulting in a large amount of demolition work and damage to the integrity of the U-shaped groove, which will undoubtedly increase the difficulty of construction and increase its own cost

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