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The Method of Demolition of Multi-span Bridge Girder Body in Business Line by Longitudinal Connection of Bridge Erecting Machine

A bridge erecting machine and bridge technology, applied in the direction of bridges, bridge construction, bridge maintenance, etc., can solve the problems of non-practicability, etc., and achieve the effect of saving the cost of materials and equipment

Active Publication Date: 2020-05-19
中铁八局集团第二工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the influence of the length of the main girder of the bridge crane, it is not feasible to require symmetrical demolition for multi-span girder bodies with large spans and a large number of spans.

Method used

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  • The Method of Demolition of Multi-span Bridge Girder Body in Business Line by Longitudinal Connection of Bridge Erecting Machine
  • The Method of Demolition of Multi-span Bridge Girder Body in Business Line by Longitudinal Connection of Bridge Erecting Machine
  • The Method of Demolition of Multi-span Bridge Girder Body in Business Line by Longitudinal Connection of Bridge Erecting Machine

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Embodiment Construction

[0065] The present invention will be further described below in conjunction with accompanying drawing:

[0066] For the convenience of explanation, a specific embodiment is now provided, and a detailed explanation is given by taking the reconstruction and expansion project of Lianhuo Expressway across Beijing-Kowloon Railway as an example.

[0067] Project Overview

[0068] The superstructure of Lianhuo Expressway Crossing Beijing-Kowloon Railway Overpass is: 2×20m+(23+3×35+23)+2×20m (structure type: prestressed concrete hollow slab + prestressed concrete continuous rigid frame + prestressed concrete Hollow slab structure), the total length of the bridge is 236.12m, the width of the half bridge deck is 12m, the clearance under the bridge is 7.62m, the bridge deck is two-way 4 lanes, and the (23+3×35+23)m prestressed concrete continuous rigid structure part corresponds to the pier The numbers are: 3#, 4#, 5#, 6# piers, and the substructure is column pier foundation.

[0069](...

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Abstract

The invention discloses a method for dismantling the girder body of a multi-span bridge in a business line by longitudinal connection of a bridge erecting machine, comprising: refitting the existing bridge erecting machine so that its length meets the length of the bridge to be demolished; Move the trolley track longitudinally, which are two parallel guide beams; install the refitted bridge erecting machine on the multi-span bridge; cut and separate the bridge deck of the existing bridge, and use 5 spans as a group for the span beams Dismantled in batches, and the dismantled span beams were transported out by the beam transporter; the refitted bridge erecting machine was dismantled, and the equipment left the site. The invention solves the problem of limited blockage time of the business line and tight construction period of assembling the guide beam by adopting universal rods. It solves the construction problem that a single bridge crane cannot carry out large-span, multi-span and several-beam demolition, especially symmetrical demolition. In the construction of the business line, high-risk operations such as blasting and large-scale lifting equipment hoisting and dismantling were avoided.

Description

technical field [0001] The invention relates to the field of construction engineering, in particular to a method for dismantling multi-span bridge girders of a business line by longitudinal connection of a bridge erecting machine. Background technique [0002] When the bridge cannot meet the increasing traffic demand, the bridge should be reconstructed and expanded. Due to the limitation of the construction site, the existing bridge usually needs to be demolished before the subsequent reconstruction and expansion can be carried out. According to different bridge structures, geological conditions and site construction environment, different bridge demolition methods will be selected. [0003] When the existing bridge is a multi-span bridge and crosses the business line, due to the multi-span symmetrical demolition, it is usually considered to use a large truss structure (such as universal rods, Bailey beams, etc.) tear down. [0004] Universal rods (or Bailey beams) are use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D24/00
CPCE01D22/00
Inventor 王中华何天贵刘爽马迪曽文谭俊刘思赫
Owner 中铁八局集团第二工程有限公司