Drainage method of tunnel bedrock groundwater

A groundwater and tunnel technology, used in drainage, earthwork drilling, safety devices, etc., can solve the problems of inability to drain the bedrock of the tunnel and poor drainage of groundwater.

Inactive Publication Date: 2016-11-30
CHINA SHENHUA ENERGY CO LTD +1
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Problems solved by technology

The drainage measures in the prior art do not have a good drainage effect on groundwater, and cannot effectively drain the tunnel bedrock

Method used

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  • Drainage method of tunnel bedrock groundwater

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Embodiment Construction

[0019] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0020] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0021] It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish simila...

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Abstract

The invention provides a drainage method of tunnel bedrock groundwater. The method includes: adopting a first drilling tool to drill at the position close to a tunnel entrance for opening a drainage channel along the extension direction of the tunnel; when the length of the drainage channel reaches the first preset position, adopting disposal measures, and then adopting a second drilling tool to continue drilling along the drilling direction of the drainage channel till the length of the drainage channel reaches the second preset position; extracting air in the drainage channel to enable negative pressure to be formed in the drainage channel, and enabling water in the drainage channel to be drained. Drainage range of the drainage channel is enlarged to the largest degree, workload of drilling is reduced, influence caused on travelling cranes is avoided, groundwater can be drained effectively or water pressure can be reduced effectively, and water disasters are reduced.

Description

technical field [0001] The application belongs to the field of waterproofing and drainage of tunnel engineering, and in particular relates to a method for drainage of underground water in a tunnel bedrock. Background technique [0002] Groundwater leakage is inseparable from most tunnel diseases. Groundwater will have an adverse effect on the surrounding rock structure, thereby causing tunnel diseases. For example, lining cracks will aggravate water leakage. With the increase of leakage water, the internal reinforcement of the tunnel structure will It is easier to rust, and long-term water seepage will seriously damage the strength of the tunnel structure. Therefore, as time goes by, the degree of cracking of the tunnel structure will increase, and the greater the degree of cracking, the greater the amount of water seepage. In this way, a vicious circle is formed. Once a certain limit is reached, the tunnel structure may become unstable, the lining may fall off in pieces, an...

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Application Information

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IPC IPC(8): E21F16/02
CPCE21F16/02
Inventor 臧建军吴德山张顺峰李富荣董国伟朱亚南
Owner CHINA SHENHUA ENERGY CO LTD
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