Method for treating tunnel passing through underground river karst hall

A treatment method and technology for underground rivers, applied in tunnels, tunnel linings, underground chambers, etc., can solve the problems of destroying the groundwater environment, blind areas of grouting in the reinforcement circle, and difficulties in guaranteeing construction quality, so as to ensure the effect of grouting reinforcement and avoid The effect of water and mud, ensuring safety and reliability

Active Publication Date: 2010-12-22
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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Problems solved by technology

[0004] Affected by the irregular development of karst, the narrow face of the tunnel, the flowing water in the underground river, the selection of materials and the technical level of the existing technology, the reinforcemen

Method used

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  • Method for treating tunnel passing through underground river karst hall
  • Method for treating tunnel passing through underground river karst hall
  • Method for treating tunnel passing through underground river karst hall

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Embodiment

[0023] Example: such as figure 1 , 2 Shown in and 3, the processing method steps of the present embodiment are as follows:

[0024] Step a. Find the specific location of the underground river karst hall 1 through geological survey, and analyze the characteristics of the found underground river karst hall. The geological survey includes geological survey, magnetotelluric geophysical survey and surface deep hole survey. Firstly, according to the geological survey, the position of the tunnel 3 crossing the underground river and the engineering hydrogeological characteristics of the underground river are preliminarily judged, and then the magnetotelluric geophysical survey and the surface deep hole survey are used. The detection method basically finds out the engineering hydrogeological characteristics of the tunnel 3 crossing the dark river section.

[0025] Step b. Excavate the auxiliary tunnel 4 to reveal the karst hall of the underground river. The opening of the auxiliary t...

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Abstract

The invention relates to a method for treating a tunnel passing through underground river karst hall. The method comprises the following steps of: a, searching for the position of the underground river karst hall and analyzing geological features; b, excavating a service gallery to reveal the underground river karst hall; c, mechanically clearing rock mass with potential safety hazard, clearing accumulation bodies in the underground river hall to an appropriate position higher than the top of a tunnel, forming a diversion channel, arranging a retaining dam at an appropriate upstream position of an underground river and transferring open water current of the underground river to the diversion channel for draining; d, arranging a reinforced concrete bottom plate in the underground river hall, drilling holes downwards on the bottom plate and grouting to reinforce a karst cave accumulation body; and e, undermining the tunnel. The underground river karst hall is revealed in a way of arranging the service gallery and drainage, grouting and reinforcement are directly performed on the underground river, so that a passive mode is replaced by an active mode, an existing water path of the underground river is kept and the safety and reliability of tunnel construction and operation are ensured.

Description

technical field [0001] The invention relates to a treatment method for a tunnel passing through an underground river karst hall, belonging to the field of tunnel and underground engineering. Background technique [0002] When constructing tunnels in karst areas, karst geological problems may be encountered. When the tunnel passes through the karst hall section of the underground river, water and mud inrush are prone to occur. [0003] At present, when the tunnel passes through the water-rich karst section, it is generally used to construct a sealing wall on the tunnel face, implement advanced curtain grouting, and use the grouting reinforcement ring to resist the surrounding water and soil pressure, so as to prevent water and mud inrush. [0004] Affected by the irregular development of karst, the narrow face of the tunnel, the flowing water in the underground river, the selection of materials and the technical level of the existing technology, the reinforcement circle is pr...

Claims

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Application Information

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IPC IPC(8): E21D11/38
Inventor 苗德海田四明颜志伟李鸣冲王伟艾华安张国权
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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