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Long-span cable stayed bridge steel truss girder mounting method

A cable-stayed bridge steel and installation method technology, applied to bridges, bridge construction, erection/assembly of bridges, etc., can solve problems such as low construction efficiency, high construction difficulty, and large capital investment, so as to improve work efficiency and construction conditions , The effect of reducing the segmental lifting weight

Active Publication Date: 2014-07-09
CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] The first beam erecting method is limited by the hoisting space of the beam erecting crane, the bridge deck can only be installed as the last member of a section, resulting in no platform when assembling the remaining members
Therefore, the installation of the rods is done at high altitude, resulting in poor construction conditions, high construction difficulty, and low construction efficiency; and this leads to long cantilever time of steel truss beams and high safety risks
[0006] In the second girder erection method, the entire section of the steel truss girder includes members such as the lower chord, the bridge deck, the web, the upper chord, and the connecting system. Large hoisting equipment and transportation equipment, large capital investment

Method used

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  • Long-span cable stayed bridge steel truss girder mounting method
  • Long-span cable stayed bridge steel truss girder mounting method
  • Long-span cable stayed bridge steel truss girder mounting method

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Embodiment Construction

[0036] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0037] Such as figure 1 As shown in -3, a method for installing steel truss girders of long-span cable-stayed bridges includes the following steps:

[0038] Step 1: After the construction of the lower beam of the main tower is completed, set up the bracket 1 beside the pier, and install the lower chord 42 of the steel truss girder at the top of the pier and the bridge deck 41 on the bracket 1 beside the pier by using 2 parts of the floating crane to form a section Inter-section bridge deck 4; after completing the assembling of the inter-node bridge deck 4 between four nodes, install the girder crane 3 on the inter-node bridge deck 4.

[0039] Step 2: Assemble the lower chord 42 of the single internode steel truss girder and the bridge deck 41 in the factory to form the internode bridge deck 4; use the first water transport ship 9 to transport...

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Abstract

The invention relates to the field of bridge construction, in particular to a long-span cable stayed bridge steel truss girder mounting method. By using a girder erection crane to completely hoist bridge deck slabs and third quarters of steel truss girders, a construction platform for assembling other rods can be established as early as possible, aloft operations are reduced, cantilever erection time is shortened, construction environment is improved, and construction efficiency is improved. In addition, only the bridge deck slabs and third quarters of steel truss girders are hoisted, and accordingly hoisting weight is reduced, and investment on the girder erection crane is saved.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a method for installing a steel truss girder of a long-span cable-stayed bridge. Background technique [0002] There are two main traditional installation methods for steel truss girders of long-span cable-stayed bridges: [0003] 1. Use the beam erecting crane to assemble the loose rods on site. First install the lower string, then install the web rod, then install the upper string and connecting system, and finally install the bridge deck. The crane moves forward to continue erecting the next section with the cantilever. [0004] 2. The whole section is manufactured in the factory, and the whole section is erected on site by using a large beam erecting crane. [0005] In the first beam erection method, due to the limitation of the hoisting space of the girder erection crane, the bridge deck can only be installed as the last member of a section, resulting in no platform when...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/10
Inventor 潘东发易伦雄涂满明贾卫中邓敬雄张爱花覃勇刚胡军童林鸿徐烨张栋赵全成肖颉刘丹飞
Owner CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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