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Closure method of large-span continuous steel truss arch

A long-span, steel truss technology, applied in the direction of erecting/assembling bridges, bridges, buildings, etc., can solve the problems of high cost

Active Publication Date: 2008-02-06
CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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AI Technical Summary

Problems solved by technology

At present, there is no such tonnage jack in China, and the cost of its research and development and production is expensive

Method used

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  • Closure method of large-span continuous steel truss arch
  • Closure method of large-span continuous steel truss arch
  • Closure method of large-span continuous steel truss arch

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Experimental program
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Effect test

Embodiment Construction

[0025] (1) Three-layer sling tower dense cable system, see Figure 3.

[0026] The dense cable system of the sling tower is used for the erection of the steel truss arches of 3# and 5# piers respectively; the height of the sling tower, the anchor point of the cable and the selection of the inclination angle must ensure the safety of the steel truss arch during erection. And adjust the closing mouth to a suitable position when the closing is satisfied. The lower end of the tower column is hinged with the reserved hinged seat plate of the upper chord node of the steel truss arch, and the assembly begins after the steel beams of the side spans are closed.

[0027] The stay cable of the sling tower is made of high-strength parallel steel wire, covered with a PE protective layer, anchored by anchor boxes at the upper and lower ends, and anchored by cold cast anchors, and the lower end of the sling is a tension end. The length of the cold cast anchorage should be carefully selected ...

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Abstract

A closure method for a large-span continuous steel truss arch, which takes the adjustment of cable force of a cable of a tower with a suspended cable or a horizontal cable as the main means, combines the longitudinal moving of a steel truss to realize the closure of the steel truss. The present invention does not require truss lifting equipments, and is a safe, convenient and efficient closure method, which is applicable for the closure of general continuous steel truss beams.

Description

technical field [0001] The invention relates to a construction method for closing large-span continuous steel truss arches in bridge engineering. Background technique [0002] For the traditional large-span steel truss arch closure, the adjustment of the deflection of the closure and the angle of the truss end mainly uses the vertical, horizontal bridge, and longitudinal bridge hydraulic jack equipment on the top of the pier. , drop (vertical position adjustment). In long-span bridges, the vertical lifting amount and horizontal adjustment displacement of the truss are large, and the jacking force of the jack is also very large. Therefore, the configuration and operation of jacks and other equipment are difficult, the system conversion process is complicated, and the construction risk is high. The bridge involved in the present invention is a three-truss continuous steel truss arch structure. If the traditional method of topping and falling beams is used to close the dragon,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D21/10E01D21/06
Inventor 秦顺全周外男潘东发李军堂涂满明毛伟琦王东辉马涛龚国锋覃勇刚
Owner CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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