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Comprehensive reinforcing structure of active open-spandrel arch bridge and construction method

A reinforced structure, open-air technology, applied in the direction of bridge reinforcement, arch bridges, bridges, etc., can solve problems such as poor reinforcement effect, and achieve the effect of improving construction quality and efficiency and wide application range.

Pending Publication Date: 2022-04-19
ZHEJIANG ZHENGFANG TRAFFIC CONSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the limitations of construction conditions and bridge conditions, when the hollow arch bridge is reinforced and repaired, the reinforcement effect is often poor due to the construction space or height restrictions.

Method used

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  • Comprehensive reinforcing structure of active open-spandrel arch bridge and construction method
  • Comprehensive reinforcing structure of active open-spandrel arch bridge and construction method
  • Comprehensive reinforcing structure of active open-spandrel arch bridge and construction method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The invention relates to a comprehensive reinforcement structure of an active hollow arch bridge, which mainly includes a grouting reinforcement of the arch arch back filler, a pressure grouting treatment arch ring pointing and crack structure, an arch upper side wall reinforcement structure, a The main arch ring increases the section reinforcement structure, a reinforced concrete guardrail repair structure, and a stereotyped operation platform.

[0043]A grouting reinforcement structure for the back arch of the abdominal arch, mainly including casing, anchor bolts, customized formwork, and grouting holes. The upper side wall of the arch is provided with a customized formwork 3, and the first anchor bolt 2 fixes the customized formwork 3 A grouting hole 4 is arranged on the arch side wall and the bridge deck, and a casing 1 is arranged in the grouting hole.

[0044] A pressure grouting treatment arch ring pointing and crack structure, mainly including arc-shaped pressur...

Embodiment 2

[0051] A construction method for a comprehensive reinforcement structure of an active hollow arch bridge, comprising the following steps:

[0052] 1) Filling grouting reinforcement of the arch back of the arch: the customized formwork 3 is passed through the first anchor bolt 2 to close the arch back of the arch on both sides of the arch bridge, the grouting hole is drilled on the bridge deck, and the casing 1 is lowered at the same time, and the foamed concrete is pumped Grouting, using symmetrical synchronous grouting technology, that is, the grouting holes close to the side wall are constructed first, and then the grouting holes away from the side wall are constructed. The longitudinal bridge direction should be grouted in two sequences. For example, there are 30 holes in the longitudinal row. After the grouting holes are numbered in sequence, press 1 and 30, 3 and 28..., 2 and 29..., and plug the holes after the grout solidifies.

[0053] 2) Pressure grouting to deal with ...

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Abstract

The invention relates to a comprehensive reinforcing structure of an active open-spandrel arch bridge. The comprehensive reinforcing structure comprises a pressure grouting treatment arch ring pointing and crack structure and a finalization operation platform, the pressure grouting treatment arch ring pointing and crack structure comprises an arc-shaped pressing plate face plate, a first steel plate with bolt holes, a transverse steel pipe and a vertical steel pipe. The arc-shaped pressing plate face plate is fixed to an arch ring of a web arch through a second anchor bolt. The finalization operation platform comprises a third formwork, a second steel plate with a bolt hole, a transverse short rod, a horizontal transverse rod, a vertical rod, a connecting disc, a horizontal longitudinal rod and a buckling head, the second steel plate with the bolt hole is fixed to the web arch transverse wall through a fourth anchor bolt, and the buckling head is arranged on the connecting disc. The structure has the beneficial effects that the problem of comprehensive reinforcement construction of the open-spandrel arch bridge in active service under limited construction conditions can be solved, the structure is suitable for various working conditions during construction, and the structure has a wide application range.

Description

technical field [0001] The invention relates to a comprehensive reinforcement structure and a construction method of an active hollow arch bridge, belonging to the field of bridge construction. Background technique [0002] Due to the low design standards of some bridges built in the early stage, the traffic volume also increased rapidly with the development of the economy. The destructive effects of frequent disasters and the impact of overweight vehicles and weight restrictions have caused many bridges to have potential safety hazards and urgently need to be reinforced. The collapse of the arch bridge has a sudden change and brings greater danger. However, demolition of old bridges and construction of new bridges not only requires a large investment, but also requires interruption of traffic, which does not meet the requirements of scientific development. Therefore, it is particularly important to use methods such as reinforcement and reinforcement to restore, increase l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00E01D4/00
CPCE01D22/00E01D4/00
Inventor 何瑞峰蔡毅徐国卫
Owner ZHEJIANG ZHENGFANG TRAFFIC CONSTR CO LTD
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