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A method for strengthening cracked and damaged lining of existing railway tunnels

A technology of existing lines and railways, applied in tunnel lining, tunnel, shaft lining and other directions, it can solve the problems of secondary cracking, falling blocks, and low remediation efficiency of lining, so as to resist surrounding rock pressure, ensure safety, and avoid secondary interference. Effect

Inactive Publication Date: 2019-11-19
LANZHOU JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, after the previous treatment measures, due to the large stress on the lining by the surrounding rock, coupled with the vibration of the train, the secondary cracking and block loss of the lining occurred many times; , resulting in a lower efficiency of remediation

Method used

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  • A method for strengthening cracked and damaged lining of existing railway tunnels
  • A method for strengthening cracked and damaged lining of existing railway tunnels

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Embodiment Construction

[0015] A method for reinforcing the cracked lining of an existing line railway tunnel, comprising a first steel arch (4) and a second steel arch (5), steel plates (3), hoop steel bars (2), and longitudinal connecting bars (1) , steel plate reinforcement steel bar (6), anchor rod (7), molded concrete (8), characterized in that: the steel plate (3) is welded on the outer edge of the first steel arch (4) and the second steel arch (5) On the inner side, the steel plate (3) is bent according to the arc of the first steel arch (4) and the second steel arch (5) at the site installation position, the first steel arch (4) and the second steel arch ( 5) Three hoop steel bars (2) are erected between them and longitudinal connecting steel bars (1) are laid to form a hoop steel mesh, and steel plate reinforcement bars (6) are welded to the first steel arch (4) and the second steel arch ( 5) On the outside of the steel plate (3) between the outer edges, weld the anchor rod (7) to the steel ...

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Abstract

The invention relates to a method for reinforcing a fractured lining of an existing railway tunnel. A first steel arch (4), a second steel arch (5), a steel plate (3), three circumferential steel bars (2), longitudinal connecting steel bars (1), steel plate reinforcing steel bars (6), anchor rods (7) and formwork concrete (8) are involved. The method is characterized in that the steel plate (3) is welded to the inner sides of the outer edges of the first steel arch (4) and the second steel arch (5) and bent according to the radians of the site steel arches; the three circumferential steel bars (2) are erected and the longitudinal connecting steel bars (1) are laid between the first steel arch (4) and the second steel arch (5) to form a circumferential steel bar net; the steel plate reinforcing steel bars (6) are welded to the outer side of the steel plate (3) between the outer edges of the first steel arch (4) and the second steel arch (5); the anchor rods (7) are welded to the steel plate (3); and the concrete (8) is poured between the steel plate (3) and a fresh face where broken concrete is chiseled away.

Description

technical field [0001] The invention relates to a method for reinforcing the cracked damaged lining of existing line railway tunnels, and is particularly suitable for the treatment of tunnel cracked damage and broken blocks. Background technique [0002] my country has a vast territory, and various natural conditions vary greatly. The engineering geology and hydrogeological conditions of the mountains through which the tunnel passes are complex and changeable. The increase in the service time of existing railway tunnels and the increase in the service life of concrete are also constantly developing, especially with the continuous increase in the speed of trains on existing lines and the construction of a large number of passenger dedicated lines, a large number of railway tunnels have increased, and medium, long and extra-long tunnels have become more and more With more and more researches on the prevention and treatment of tunnel diseases, it has a strong urgency and necessit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/00E21D11/18
CPCE21D11/00E21D11/183
Inventor 李德武高以健雷林吴玉哲姚永刚何如来
Owner LANZHOU JIAOTONG UNIV
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