A construction method for dismantling a truss-type composite arch bridge

A construction method and technology for combined arch bridges, applied in the direction of arch bridges, truss bridges, bridges, etc., can solve problems such as large impact loads, left and right swings, and mutual restraint of forces, and achieve the effect of avoiding easy damage
CN111676846BActive Publication Date: 2022-07-22贵州大通路桥工程建设有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
贵州大通路桥工程建设有限公司
Publication Date
2022-07-22

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Abstract

The invention discloses a construction method for dismantling a truss-type composite arch bridge. The construction steps of this construction method are divided into three major parts: first, remove the bridge deck system, second, install the slings, and third, remove from the mid-span to the sides of the two arches in turn, first remove the side box of the solid web section, Then, remove the upper chord saddlebags, the oblique web rod, and the lower chord saddlebags of the fourth section, the third section, the second section, and the first section in sequence. In the construction method, the arch ring of the old bridge is lifted and supported by means of the CFST arch structure of the new bridge, the axial force of the arch structure is slowly released by setting a jack during the opening of the arch, and the side box is clamped by a vertical limit device. This ensures that the old bridge is stably converted from an independent system to two separate cantilever systems, which ensures the smooth demolition of the bridge.
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Description

technical field

[0001] The invention relates to a construction method for dismantling a truss-type composite arch bridge, and belongs to the technical field of bridge dismantling. Background technique

[0002] Bridges are an important part of roads, and they are mainly erected on rivers, lakes and seas, as well as between adjacent mountains and streams. With the rapid growth of my country's economy, road transportation is also developing rapidly. Some bridges built two or three decades ago have been unable to transport demand, so new bridges need to be built to replace the old ones. Some of the old bridges need to be demolished, and the easiest and quickest way to demolish a bridge is to demolish it by blasting. However, not all old bridge demolition methods are suitable for blasting demolition. For example, some bridges erected in nature reserves, scenic reserves, drinking water areas, etc., if blasting demolition is used, it is easy to cause damage to the environment and...

Claims

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