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Construction method of long-span concrete-filled steel tube concrete arch bridge first turned vertically and then hoisted in situ

A concrete-filled steel tube and overall lifting technology, applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve the problem of single construction process method, and achieve the effect of reducing risks, improving assembly, and improving construction quality

Active Publication Date: 2015-08-05
NO 3 ENG COMPANY OF CHINA RAILWAY NO 8 ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the construction of steel pipe arches at home and abroad, the most commonly used erection method is the cable-stayed cantilever cable hoisting method, followed by the swivel method and the bracket method. For general projects, the usual construction method is relatively simple

Method used

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  • Construction method of long-span concrete-filled steel tube concrete arch bridge first turned vertically and then hoisted in situ
  • Construction method of long-span concrete-filled steel tube concrete arch bridge first turned vertically and then hoisted in situ
  • Construction method of long-span concrete-filled steel tube concrete arch bridge first turned vertically and then hoisted in situ

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Experimental program
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Embodiment

[0032] Such as figure 1 As shown, a long-span concrete-filled steel tube arch bridge is first vertically rotated and then in-situ integrally lifted. The construction method includes the following construction steps:

[0033] 1. Assembly construction

[0034] Complete the main structure of the pier body at both ends of the arch bridge and set up a pre-embedded section 1 of the arch foot on both sides of the main structure of each pier body; corresponding to the pre-embedded section 1 of each arch foot, complete the temporary hinge 3 and the rear anchor point respectively The construction of 4 and the erection and installation of temporary assembly brackets 2 and two hoisting towers 5 as a group, the top of each group of hoisting towers 5 is arranged with lifting cylinders, hoisting cables 15 and bottom anchors; Steel pipe arch ribs are installed by section welding, and cross braces 13 are respectively installed between two mutually parallel arch ribs as a whole to form two swi...

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Abstract

The invention discloses a long-span concrete filled steel tube arch bridge construction method achieved through integral lifting on site after vertical turning. The method includes the construction steps of (1) finishing construction of a pier body main structure, arch foot pre-cast sections, temporary transfer hinges and rear anchor points and erection and installation of a temporary splicing support and lifting towers, wherein the top of each lifting tower is provided with a lifting oil cylinder, a lifting cable and a bottom anchor, and one end of each rotation section is hinged to the corresponding temporary transfer hinge and placed on the temporary splicing support; (2) finishing vertical turning, wherein patching sections are arranged between every two corresponding rotation sections to form an integral lifting section; (3) cutting off the temporary transfer hinges and carrying out integral lifting on site, wherein adjustment sections are arranged between the two ends of the integral lifting section and the corresponding arch foot pre-cast sections and are welded as a whole. By the adoption of the method, large-span steel tube arch installation construction is achieved, and optimized utilization of construction site space is fully achieved through rotation construction; dangerousness of aloft splicing work is reduced, and the work period is shortened.

Description

technical field [0001] The invention relates to a bridge construction method, in particular to a construction method in which a large-span concrete-filled steel tube arch bridge is vertically rotated first and then integrally lifted in situ. Background technique [0002] Since my country's first concrete-filled steel tube arch bridge, Sichuan Wangcang Bridge, was completed in 1990, concrete-filled steel tube arch bridges have developed rapidly in my country, and construction techniques have been constantly innovated. At present, in the construction of steel pipe arches at home and abroad, the most commonly used erection method is the cable-stayed cantilever cable hoisting method, followed by the swivel method and the bracket method. For general projects, the usual construction method is relatively simple. Contents of the invention [0003] The purpose of the present invention is to provide a construction method for large-span concrete-filled steel tube arch bridges to be v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D21/00
Inventor 胡超罗润敏赖佳兵汤建和尚明乾王杰李超席利萍吕建华刘佳银
Owner NO 3 ENG COMPANY OF CHINA RAILWAY NO 8 ENG GRP
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