Overpass bridge dismounting method

Abstract

The invention discloses an overpass bridge dismounting method. A main overpass bridge deck system of a reinforced concrete combination overpass bridge is cut into three n-shaped beam units in the longitudinal direction, bridge surface separation is conducted under the condition that underbridge traffic is not closed, a bridge surface top board keeps a certain thickness and is not thoroughly cut when cut, it is avoided that cut-off reinforcing steel bars, concrete waste residues and cooling water fall onto a railway line and other business lines to affect normal operation of the railway line and the like in a cut process, residual unseparated layers of the bridge surface top board are cut with limited time according to the time replied by the railway department and other competent departments after preparatory work is ready, the bridge surface is clamped overall by using a hoisting tool, and the bridge surface which is clamped overall is separated in a hoisted mode by using a bridge girder erection machine suspension arm. Total construction time is shortened, the overall construction scheme is simple, rapid, convenient to implement, safe, reliable and high in operability, normal operation affected time of the railway line, a highway line and the other business lines is greatly shortened, and high timeliness and convenience are achieved.

Description

technical field [0001] The invention belongs to the technical field of construction and transformation of railway overpass bridges, and in particular relates to a method for dismantling a overpass bridge. Background technique [0002] In the 1970s and 1980s, in solving the problem of level crossing of roads and railways in my country, due to the limitation of technical conditions at that time, a large number of steel-concrete composite bridge structures were used for the upper span of the road. The design level is low, and the traffic pressure brought about by the rapid development of our country for more than 30 years has not been fully foreseen. In addition, the repeated prohibition of overloaded and oversized vehicles has left a huge safety hazard for the flyover bridge built in those years. In view of the emergence of this kind of problem, combined with the national policy of putting people first and safety first, the highway overpass bridge in our country is bound to ent...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a method for dismantling a flyover bridge, which can effectively solve the problems of poor timeliness and low efficiency in the process of dismantling the flyover bridge, and realize rapid construction. Greatly shorten the time that affects the normal operation of railways and roads

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