Underground excavation construction process and equipment for rail transit air duct

A technology of rail transit and construction technology, which is applied to mining equipment, tunnels, tunnel linings, etc., can solve problems such as surface subsidence, and achieve the effects of reducing risks and strengthening strength

Pending Publication Date: 2021-08-10
CHINA RAILWAY 16TH BUREAU GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The embodiment of the present application provides a construction technology and equipment for underground excavation of rail transit air ducts, which solves the above-mentioned problem of surface subsidence caused by improper construction

Method used

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  • Underground excavation construction process and equipment for rail transit air duct
  • Underground excavation construction process and equipment for rail transit air duct
  • Underground excavation construction process and equipment for rail transit air duct

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Embodiment Construction

[0024] Next, an exemplary embodiment according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of the present application, rather than all embodiments of the present application, to be understood, the present application is not limited by the example embodiments described herein.

[0025] Exemplary method

[0026] figure 1 It is a flow chart of the mark-impected construction process of the rail transformer in the present application. The rail transit air includes a multi-layer calendering from the upper part; figure 1 As shown, the mirroring construction process of the rail transit hall is included in the following steps:

[0027] Step 110: Set the support door frame on the side wall of the multilayer cavity.

[0028] The airwave includes a multi-layer cale in the upper to the bottom, and each guide hole can be excavated by a full-sectional method or a st...

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Abstract

The invention provides an underground excavation construction process and equipment for a rail transit air duct. The strength of the air duct is enhanced by erecting a supporting door frame on the side wall of a multi-layer pilot tunnel, an upper-layer grouting pipe is arranged at the top of the construction surface of an upper-layer pilot tunnel in the multi-layer pilot tunnel, and grout is injected into the upper-layer grouting pipe; and then excavating operation is executed on the construction surface of the upper-layer pilot tunnel, and when the construction length of the upper-layer pilot tunnel is larger than the preset length, a lower-layer pilot tunnel is excavated below the upper-layer pilot tunnel. The excavation operation of the lower-layer pilot tunnel is started after the construction length of the upper-layer pilot tunnel is larger than the preset length, so that staggered construction of the upper-layer pilot tunnel and the lower-layer pilot tunnel is guaranteed, and the risk of surface subsidence is further reduced.

Description

Technical field [0001] The present application relates to the field of tunnel construction, and in particular, there is a dark excavation construction process and apparatus for rail transit wind turbines. Background technique [0002] The shallow embedding method is a method of mushing construction in various types of underground cave chamber in a closer surface. In the soft surrounding rock formations of the urban, under shallow cooking conditions, the underground project was built to transform geological conditions as a focus on controlling surface settlement, with a grille (or other steel structure) and anchor as an initial support means. [0003] The dark excavation process of the air in the track has a good construction effect for underground projects of weak formation (such as the formation of urban in Beijing, Shenzhen, Xi'an and other cities, such as subway, underground roads, etc.). However, since the excavation has changed the stress state of the original structure, suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10E21D11/15
CPCE21D11/10E21D11/107E21D11/152
Inventor 戴兴民喻洋贠宁邵哲苗爱东崔鸿鹏于化风
Owner CHINA RAILWAY 16TH BUREAU GRP CO LTD
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