Tunnel seepage protection method for soft soil stratum by existing shield method

A technology of shield tunneling and anti-seepage, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc. It can solve the problems of complex equipment and technology, no leakage location and seepage volume prediction, and difficulty in popularization

Active Publication Date: 2012-07-04
CHINA RAILWAY 16 BUREAU GRP BEIJING METRO ENG CONSTR +1
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  • Abstract
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Problems solved by technology

Due to the complex equipment and technology of this method, it has high requirements on the operation level of construction personnel, and it is difficult to popularize under the current conditions.
And there is no prediction of the location of the leakage and the amount of seepage, and the anti-seepage process is blind

Method used

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  • Tunnel seepage protection method for soft soil stratum by existing shield method
  • Tunnel seepage protection method for soft soil stratum by existing shield method
  • Tunnel seepage protection method for soft soil stratum by existing shield method

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Embodiment Construction

[0081] Embodiments of the present invention are described in detail below, and the present embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are provided, but the protection scope of the present invention is not limited to the following embodiments.

[0082] A cross-river tunnel in a soft soil layer, the tunnel is about 1462 meters long, and the outer diameter of the tunnel segments is 11.22 meters. The reinforced concrete segments are assembled into a ring with staggered joints. The buried depth of the tunnel centerline is 29.8 meters.

[0083] The implementation process of this embodiment is as follows:

[0084] (1) Obtain the soil layer division information of the shallow soil including the tunnel, and determine the permeability coefficient of the soil layer.

[0085] ① Use the pore pressure static penetration method to obtain the soil layer division information of the sha...

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Abstract

The invention discloses a tunnel seepage protection method for a soft soil stratum by an existing shield method, which includes: acquiring stratum division information of shallow soil containing a tunnel; determining permeability coefficient of the stratum; obtaining theoretical maximum seepage through the stratum permeability coefficient and lining permeability coefficient; distributing detection points at the theoretical maximum seepage position of the tunnel, a structural longitudinal inflection point of the tunnel and a seam between the tunnel and the lining; and timely taking plugging measures when seepage occurs at the detection points. Waterproofing and seepage protection effects are evident for the tunnel, and the method is simple and low in operation cost.

Description

technical field [0001] The invention relates to an anti-leakage protection method for tunnels in the technical field of tunnel engineering, in particular to an anti-leakage protection method for existing shield tunnels in soft ground. Background technique [0002] In recent years, with the continuous advancement of China's urbanization process, the problem of urban traffic congestion has become more and more serious. The construction of cross-river tunnels can solve or improve the current situation of urban traffic, so it has been widely used. However, due to the complex hydrogeological conditions of the location of the cross-river tunnel, and when the tunnel is put into use, the materials at the inflection points of the tunnel structure and the joints of the tunnel lining are prone to aging, and leakage problems will occur in the cross-river tunnel. Tunnel leakage will affect the strength of the tunnel structure itself, which not only shortens the service life of the tunne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/38E21F17/18
Inventor 高宪民李辉张伟森许烨霜刘卫铎罗太祥沈水龙马磊李博
Owner CHINA RAILWAY 16 BUREAU GRP BEIJING METRO ENG CONSTR
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