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External slanted type steel box arch installing method

An installation method and technology of steel box arch, which are applied in the direction of arch bridges, bridge forms, erection/assembly of bridges, etc., can solve the problems of high construction safety factor, low construction investment, high construction cost, and achieve convenient construction operation, saving construction period, and speeding up construction. The effect of construction speed

Active Publication Date: 2015-05-27
CHINA RAILWAY NO 2 ENG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages of high construction cost and poor safety of the existing less support method in the steel box arch construction project of the outwardly inclined steel box arch bridge with large arch rib span and high height in the prior art, Provide an optimized less-bracket installation method for outward-tilted steel box arches, which has low construction investment, high efficiency and high construction safety factor

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0023] Project: Chengdu Hongxing Road South Extension Bridge Project across the Fuhe River (hereinafter referred to as the Fuhe Bridge).

[0024] The Fuhe Bridge is an asymmetrical outward-inclining steel box arch bridge; its arch ribs are composed of two independent outward-inclining arch ribs in the north and south, which are respectively located in their own inclined planes, and the outward inclination angles are different, 18° (south arch) , 30° (north arch), there is no horizontal connection between the arch ribs, the two arch ribs meet under the main beam, separate from each other at the top of the vault, and are supported on the main beam by inclined slings.

[0025] In order to complete the above items, the present embodiment adopts the following installation method, including the following steps:

[0026] (1) Steel arch support foundation pile foundation and platform cap construction;

[0027] (2) Installation of supporting steel pipe columns and construction of dist...

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Abstract

The invention discloses an external slanted type steel box arch installing method, which belongs to the technical field of the bridge construction. The external slanted type steel box arch installing method includes the following steps: an arch rib and an arch section are operated to complete turning to the side and turning over on the ground; after the arch section is lifted on a bracket at the top of a support, the fine adjustment of the accurate positioning of the arch section is performed through a trim holder arranged at the top of the support, a support top bracket and a jack; after the position of the arch section is adjusted in place, the temporary welding positioning measure is performed, and the arch section positioning and installing are completed. The optimized less support method according to the invention has the advantages that the posture adjusting process is performed on the ground, meanwhile, the arch section is accurately positioned though the trim holder, the support top bracket and the jack, the high altitude construction safety risk is eliminated, the quality control risk is lowered, the construction operation is convenient, the construction speed is fast, and the construction period can be saved about 30 days compared with the traditional less support method.

Description

technical field [0001] The invention relates to an installation method of an outwardly inclined steel box arch, in particular to an installation method of a large outwardly inclined steel box arch, and belongs to the technical field of bridge construction. Background technique [0002] With the gradual improvement of bridge design and construction level, more and more bridges with diversified structural forms and integrated functions of use and viewing continue to emerge. [0003] Nanning Bridge is the world's first large-span curved girder asymmetric outward-dipping steel box arch bridge. Its single-hole span is 300m. composition. The line shape of the main bridge assembly adopts the plane curve radius of the main girder of 1500m, the inclination angle of the arch rib on the east side is 69.7°, and the inclination angle of the arch rib on the west side is 66.5°. axis. The asymmetric outward-tilting steel box arch bridge is the first in the world, breaking the conventio...

Claims

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Application Information

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IPC IPC(8): E01D21/00
CPCE01D4/00E01D21/00
Inventor 谢卜均王俊刘启飞李沛泽彭亮英
Owner CHINA RAILWAY NO 2 ENG GRP CO LTD
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