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Method for mounting trestle bridge segment box girder

An installation method and technology for viaducts, applied in the direction of erecting/assembling bridges, bridges, and bridge construction, etc., can solve problems such as too small curves, and achieve the effect of easy construction

Inactive Publication Date: 2008-04-09
CHINA FIRST METALLURGICAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is a multi-span continuous beam structure, after one span is stretched and formed, the bridge deck can only bear the static load of its own weight, and cannot bear the designed active load. The design load can only be reached after stretching, so after the previous span is formed, vehicles cannot be driven on the bridge deck to transport the box girder section of the next span
In addition, if the site conditions are limited, such as: the width of both sides of the road, the curve is too small, traffic diversion, space height and other issues, using bridge erecting machines, gantry cranes or other forms of cranes may encounter many difficulties

Method used

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  • Method for mounting trestle bridge segment box girder
  • Method for mounting trestle bridge segment box girder
  • Method for mounting trestle bridge segment box girder

Examples

Experimental program
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Embodiment Construction

[0039] As shown in Figure 1 and Figure 2, the installation method of the viaduct section box girder includes the following steps:

[0040] 1) Set up the first row of support frames 5 and the second row of support frames 10 along the longitudinal tower between two adjacent front and rear piers 8, and then erect (fix) the first row of support frames 5 and the second row of support frames 10 One guide rail 4, the second guide rail 9, the two ends of the first guide rail 4, the second guide rail 9 are respectively arranged on two adjacent bridge piers 8 (the top of the bridge piers is provided with embedded parts, by which the first guide rail 4 , the second guide rail 9 is connected with the pier to improve the stability of the first row of support frames 5 and the second row of support frames 10); the first guide rail 4 and the second guide rail 9 are respectively equipped with vertically moving trolleys 3, 2 vertically The mobile trolley 3 is connected with the traction wire ro...

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Abstract

The invention relates to an installation method of a viaduct segment box girder, which is characterized in that a mobile crane is adopted, the box girder segment of a front span is vertically lifted in the front of a front bridge pier; a vertically moving cart and a hoister are adopted and move vertically; and a horizontal moving device is adopted to conduct horizontal contraposition adjustment. The invention occupies relatively little traffic rode space and basically does not occupy the space in the two sides of the viaduct.

Description

technical field [0001] The invention relates to a method for installing a section box girder of a viaduct. Background technique [0002] The box girder section of the section box girder of the viaduct, the single box girder section weighs hundreds of tons. The length of the box girder section is equal to the width of the bridge deck, which may reach 10-20 meters, and the width is generally 2-3 meters. A span usually consists of 10 to 20 blocks. And all the box girder sections within one span must be installed in place, put on steel strands, and prestressed to form a whole span. If it is a multi-span continuous beam structure, after one span is stretched and formed, the bridge deck can only bear the static load of its own weight, and cannot bear the designed active load. The design load can only be reached after stretching, so after the previous span is formed, vehicles cannot be driven on the bridge deck to transport the box girder section of the next span. In addition, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00
Inventor 沈德峰
Owner CHINA FIRST METALLURGICAL GROUP
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