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Secondary vertical rotating construction method for arch rib of long-span steel arch bridge

A construction method and large-span technology, applied in the direction of arch bridges, bridges, bridge forms, etc., can solve problems such as difficult to guarantee welding quality, difficult to install in place, difficult to implement construction plans, etc., to improve construction quality, reduce construction risks, reduce The effect of the amount of support work

Active Publication Date: 2010-10-20
CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the problems that the existing long-span steel arch bridge arch rib construction method is difficult to install in place, the welding quality is difficult to guarantee, or the construction plan is difficult to implement

Method used

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  • Secondary vertical rotating construction method for arch rib of long-span steel arch bridge
  • Secondary vertical rotating construction method for arch rib of long-span steel arch bridge
  • Secondary vertical rotating construction method for arch rib of long-span steel arch bridge

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Embodiment Construction

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] This embodiment has a total length of 528.1m and a main span of 342m. It is a reinforced concrete arch bridge with a stiffened frame. There are 2 arch ribs in the whole bridge. The arch ribs are all inwardly inclined at 6.8°, which is a basket arch structure. In order to make full use of the "V"-shaped valleys on both sides to build construction supports, the arch rib is divided into upper and lower sections, which are connected by a middle hinge. The lower section of the arch rib is tilted back 65° along the designed arch axis, basically parallel to the mountain, and the upper section of the arch rib is on the basis of which the left bank is tilted back 65°, and the right bank is tilted back 55°.

[0037] figure 1 , figure 2 They are the assembly drawings of the left and right bank arch ribs respectively, as shown in figu...

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Abstract

The invention discloses a secondary vertical rotating construction method for an arch rib of a long-span steel arch bridge, which comprises the following steps of: dividing an arch rib into an upper section and a lower section; finishing assembly on an arch rib bracket and articulating the upper section and the lower section of the arch rib by a middle hinge; articulating the bottom end of the lower section of the arch rib and a bottom hinge; vertically rotating the arch rib to the position twice in such a way that an anchoring system is provided with a traction rope, an upper fastening rope and a lower fastening rope; and finally installing a closure section. The invention fully utilizes terrains at both sides of a V-shaped valley, reduces the bracket engineering amount, converts high-altitude operation into assembly and welding of the arch rib on a bracket which is closer to the ground, effectively reduces construction risk and greatly improves construction quality.

Description

technical field [0001] The invention relates to a bridge construction method, in particular to a construction method for secondary vertical rotation of arch ribs of a large-span steel arch bridge, which is used for erecting steel arch bridges in "V"-shaped valleys with harsh environments. Background technique [0002] With the increasing number of railway and expressway construction projects in our country, more and more bridge projects are being built in deep mountains and valleys with poor natural conditions, especially long-span steel arch bridges, because this structure is especially suitable for deep valleys and rapid construction. The plateau canyon area with harsh environment. [0003] Existing long-span steel arch bridges are generally constructed using the cantilever buckle-hanging method or the swivel method. The cantilever buckle hanging method generally uses a cable crane to hoist the arch ribs for cantilever assembly, and the installed arch ribs are anchored on...

Claims

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Application Information

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IPC IPC(8): E01D21/08E01D4/00
Inventor 秦顺全李军堂涂满明毛伟琦姚森张爱花宋小三姚发海张瑞霞彭颇曲江峰
Owner CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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