Construction method of quick replacement of suspension rods of mid-through and through arch bridges

A construction method and boom technology are applied in the construction field of rapid replacement of booms of mid-bearing and bottom-bearing arch bridges, which can solve the problems of increasing the danger of booms, complicated structural stress, low replacement efficiency, etc. The effect of hidden safety hazards, low construction risk and simple construction

Active Publication Date: 2019-01-08
GUANGDONG HELI CIVIL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the design and construction of the early intermediate-supported and under-supported arch bridges, the suspenders were anchored to the arch ribs or beams. This anchoring form was based on the limitations of the technology at the time and the short-term maintenance and replacement. Eliminate the corrosion of the exposed suspender steel wires of the arch rib and beam, and at the same time make the suspender, arch rib and beam part form a unified rigid body, improve its integrity, and increase the anchoring force of the suspender, arch rib and beam, but cause There are many factors affecting the replacement of booms in the later stage, high technical requirements, complex construction technology, and difficult replacement, resulting in low replacement efficiency. According to the technical characteristics of boom replacement at the present stage, if we want to speed up the progress of boom replacement, there is and only a temporary increase in investment. It is not only a waste, but also the replacement of multiple booms at the same time will lead to more complicated structural forces and increase the risk of boom replacement

Method used

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  • Construction method of quick replacement of suspension rods of mid-through and through arch bridges
  • Construction method of quick replacement of suspension rods of mid-through and through arch bridges
  • Construction method of quick replacement of suspension rods of mid-through and through arch bridges

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example 1

[0082] The old Gaoming Bridge was built in 1989. The bridge site is located on the provincial highway S113, crossing the Xijiang River in the east-west direction. It is a super-large bridge on the main stream of the Xijiang River. m, two-way 4 lanes, the span combination is (78.5+4×82.6) top-supported reinforced concrete rib arch bridge + (2×110) medium-supported steel tube concrete suspension rod arch bridge + (5×79+68.2)m top support Type reinforced concrete rib arch bridge, the total width of the bridge deck is 13.35m, and the reinforced concrete deck. The Xijiang waterway at the Gaoming Bridge is an inland Class I waterway, with a 3000t ocean-going vessel passing through it, a clear navigable height of 22m, and a designed maximum navigable water level of 8.01m (Zhuji). The number of suspenders for the whole bridge is 36, the specification of the old suspenders is 5-109 steel wire, the strength of the steel wire is 1600Mpa, and the breaking force is 349.2t. According to th...

example 2

[0084] The Fochen Bridge in Foshan City was completed and opened to traffic in 1994, with a length of 883.84m and a main span of 115.80m. The bridge span combination is: (15×16)m prestressed hollow slab + (3×28.3)m reinforced concrete continuous beam + 112.8m under-supported steel pipe concrete tie rod arch + (3×28.3)m reinforced concrete continuous beam + ( 18×16)m prestressed hollow slabs with 40 spans in total. A total of 42 suspenders are installed on the two ribs of the main bridge with a spacing of 5m. The suspenders are all made of SNS / S-85×7mm galvanized steel wire extruded double-sheathed button pattern finished cables, the upper end of which is anchored on the inner anchor plate of the upper tube of the arch rib by LZM85IJ-7 type cold-cast heading anchor, and the lower end is A self-designed heading anchor is used to anchor in the beam. In April 2017, 6 bridges were tested using this construction method. During the whole suspender replacement process, the force sta...

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Abstract

The invention discloses a quick replacement construction method of a halfway through arch bridge and a lower through arch bridge suspender, which comprises the following steps of: 1, installing an operation platform to prepare for measuring and monitoring; 2, installing a temporary pocket suspension system; 3, tensiong the temporary pocket suspension system to cut off the old boom; 4, removing that old boom; 5, installing and tensioning that new boom to realize the replacement of the boom; 6, removing the temporary hoisting system and adjust the cable force of the new boom. The construction method can achieve the purpose of quickly replacing the old boom under the condition of less investment of temporary boom, operators and machinery, especially in the early replacement construction of mid-through and through arch bridge boom which is suitable for anchoring the boom on the arch rib or cross beam, and the construction method is more efficient.

Description

technical field [0001] The invention relates to a method for replacing suspenders of arch bridges, in particular to a construction method for quickly replacing suspenders of a mid-support type and a bottom-support type arch bridge. Background technique [0002] Due to the beautiful shape and large spanning capacity of the boom arch bridge, it is generally built on urban roads, becoming a beautiful landscape of the city and enhancing the image of the city. However, the urban roads are densely packed with traffic and the driving lanes are limited. Generally, the replacement of booms requires the whole bridge to be closed or closed. Some lanes have a greater impact on the lives of citizens. In order to reduce the impact on traffic, the general competent department has strict requirements on the construction period. [0003] In the design and construction of the early intermediate-supported and under-supported arch bridges, the suspenders were anchored to the arch ribs or beams...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00E01D4/00
CPCE01D4/00E01D22/00
Inventor 肖开军罗小聪吴志淋杨文甫张长利李鸿彬陈俊易学锋何嘉强杜波黄明海戴春洋成莉朱燕萍
Owner GUANGDONG HELI CIVIL ENG CO LTD
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