Overpass bridge dismounting method

A flyover bridge and flyover technology, applied in construction, building maintenance, building construction, etc., can solve problems such as low efficiency, poor timeliness, shortening the normal operation time of railways and highways, etc., and achieve strong operability and construction plan Simple and convenient, reducing the effect of normal operation time

Inactive Publication Date: 2014-07-23
卢来运
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  • Abstract
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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 o...

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  • Overpass bridge dismounting method

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] A method for dismantling a flyover, comprising the steps of:

[0033] Step 1: Carry out longitudinal cutting on the top plate of the main span bridge deck of the flyover bridge to form three Π-shaped steel beam units. For the first time, the 5-6cm thickness of the bottom of the bridge deck is not cut through without closing the traffic under the bridge;

[0034] Step 2: Carry out road closure under the bridge where the overpass bridge is demolished and constructed;

[0035] Step 3: Cut through the bridge deck with a thickness of 5-6cm at the bottom;

[0036] Step 4: Use lifting tools to clamp the cut steel beam;

[0037] Step 5: Use lifting tools to lift the overall clamped steel beams away.

[0038] Such as figure 1 As shown, in step 1, before cutting the top plate of the main span bridge deck of the span bridge, an L-shaped protec...

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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...

Claims

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Application Information

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IPC IPC(8): E01D24/00
Inventor 卢耒运秦兰芳王振武胡增国刘海霞
Owner 卢来运
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