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Gypsum-containing stratum railway tunnel anti-release combined supporting structure and construction method thereof

A technology of supporting structure and construction method, applied in tunnels, tunnel linings, underground chambers, etc., can solve the problem of high engineering cost, reduce engineering cost, reduce the impact of external loads, and save engineering investment.

Pending Publication Date: 2021-02-23
CHINA RAILWAY TUNNEL SURVEY & DESIGN INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, none of these methods can well solve the problems existing in tunnels in gypsum-bearing strata, and the project cost is relatively high

Method used

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  • Gypsum-containing stratum railway tunnel anti-release combined supporting structure and construction method thereof
  • Gypsum-containing stratum railway tunnel anti-release combined supporting structure and construction method thereof
  • Gypsum-containing stratum railway tunnel anti-release combined supporting structure and construction method thereof

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Embodiment Construction

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] Embodiments of the present invention provide a kind of gypsum stratum railway tunnel anti-discharge combined support structure, such as figure 1 As shown, it includes surrounding surrounding rock reinforcement layer 1, primary support structure 2 and secondary lining structure 5 arranged sequentially from outside to inside, prestressed anchor rod 6 is inserted into said surrounding surrounding rock reinforcement layer 1, and said primary support A buffer layer 3 and a waterproof layer 4 are arranged between the structure 2 and the second lining structure 5, and the waterproof layer 4 is located inside the buffer layer 3. The cross section of the primary support structure 2 and the second lining structure 5 is an elliptical r...

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Abstract

The invention provides a gypsum-containing stratum railway tunnel anti-release combined supporting structure. The structure comprises a peripheral surrounding rock reinforcing layer, a primary supporting structure and a secondary lining structure which are sequentially arranged from outside to inside; prestressed anchor rods are inserted into the peripheral surrounding rock reinforcing layer; a buffer layer and a waterproof layer are arranged between the primary supporting structure and the secondary lining structure; the waterproof layer is located at the inner side of the buffer layer; and the sections of the primary supporting structure and the secondary lining structure are oval rings, and the ratio of the radius of the short side to the radius of the long side of each oval ring is 0.75-1. A construction method includes the steps of tunnel surrounding rock depth combined treatment, primary support construction, deformation space reserving construction, and secondary lining construction. According to the gypsum-containing stratum railway tunnel anti-release combined supporting structure, the overall strength is enhanced, the curvature of a side wall is optimized, and the bufferlayer is arranged, so that the external release pressure of a paste-containing stratum is better absorbed and released, the pressure borne by the secondary lining structure is reduced, the tunnel structure is stabilized, the construction cost is reduced, and good economical efficiency is achieved.

Description

technical field [0001] The invention belongs to the technical field of tunnel and underground engineering design and construction, and in particular relates to an anti-discharge composite support structure and a construction method for railway tunnels in gypsum strata. Background technique [0002] In recent years, the rapid development of the railway and road tunnel business has increased the number of tunnels with gypsum-bearing strata in tunnel construction, and the problems of surrounding rock deformation, primary support deformation, and lining cracking in tunnel construction caused by gypsum-bearing strata have become more prominent. Establish a new energy design theory for tunnel support in soft rock formations, clarify the large deformation mechanism and control methods of tunnels with soft surrounding rocks, and provide new theoretical and method support for tunnel large deformation control. The anti-discharge combined support section of railway tunnels in gypsum st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10E21D11/38E21D20/00
CPCE21D11/105E21D11/38E21D20/00
Inventor 宋超业贺维国程帅涛王汉晨张杉费曼利张建国韩贺
Owner CHINA RAILWAY TUNNEL SURVEY & DESIGN INST
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