Variable cross-section prestress continuous box girder bridge deck crane hoisting and dismantling method

Abstract

A variable cross-section prestress continuous box girder bridge deck crane hoisting and dismantling method comprises the steps of 10 transporting a plurality of components forming a bridge deck crane to a construction site; 20 sequentially assembling; 30drilling hoisting holes in the bridge deck; 40 setting cutting lines; 50 cutting beam sections along the cutting lines by adopting a rope saw; 60 controlling a winch to lower the beam sections, and commanding a beam transporting ship to bear and lower the beam sections; and 70 moving the bridge deck crane backwards to the next station until all the beam sections are dismantled. Compared with the prior art, the method has the following beneficial effects that the variable cross-section prestress continuous box girder bridge deck crane hoisting and dismantling method is reasonable in design, and the dismantling efficiency is improved through component preassembly and field installation; the rope saw is adopted for static cutting and dismantling, the problems of vibration, noise, dust and other environmental pollution in the conventional dismantling construction process are solved, the cutting face is smooth, separation operation is facilitated, and continuous operation can be achieved.

Description

【Technical field】 [0001] The invention relates to the technical field of bridge deck hoisting, in particular to a hoisting and dismantling method of a variable-section prestressed continuous box girder bridge deck crane. 【Background technique】 [0002] In recent years, under the background of rapid urbanization in my country, road traffic infrastructure has been gradually improved, and expressway projects have gradually increased. However, with the increase of service life, some expressways can no longer meet the requirements of safe passage. Therefore, reconstruction and expansion projects must be carried out on the original basis. In expressway reconstruction and expansion projects, although the application of bridge demolition technology is relatively common, there is very little experience for bridge demolition of variable cross-section prestressed continuous box girders. 【Content of invention】 [0003] The object of the present invention is to provide a hoisting and ...

AI Technical Summary

Problems solved by technology

However, with the increase of the service life of some expressways, they can no longer meet the requirements of safe passage. Therefore, reconstruction and expansion projects must be carried out on the original basis.

In expressway reconstruction and expansion projects, although the application of bridge demolition technology is relatively common, there is very little experience for bridge demolition of variable cross-section prestressed continuous box girders.

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