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Water-rich tunnel construction pre-drainage structure and construction method

A technology for advanced drainage and water-rich tunnels, applied in drainage, earthwork drilling, safety devices, etc., can solve problems such as difficult to control water flow and affect tunnel construction progress, and achieve simple structure, avoid safety risks and property losses, and facilitate construction Effect

Pending Publication Date: 2019-10-18
POWERCHINA CHENGDU ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it can play a drainage effect, it will affect the construction progress of the tunnel
At the same time, it is difficult to control the water flow. In order to ensure the normal construction and construction safety, it is necessary to add drainage devices

Method used

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  • Water-rich tunnel construction pre-drainage structure and construction method
  • Water-rich tunnel construction pre-drainage structure and construction method

Examples

Experimental program
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Effect test

Embodiment

[0028] An advanced drainage structure for water-rich tunnel construction, including an advanced drainage hole 1, the advanced drainage hole 1 extends into the groundwater of the rock mass 10 along the excavation direction of the tunnel 11, and the advanced drainage hole 1 is located in the rock mass on the side of the tunnel 11 Inside. It also includes a drainage hole 2, the drainage hole 1 is located in the rock mass 10 on the side of the tunnel 11, and the drainage hole 2 communicates with the advanced drainage hole 1. The drainage hole 2 and the leading drainage hole 1 are arranged in sequence along the tunnel excavation direction, that is to say, the leading drainage hole 1 is located in front of the drainage hole 2 (with the tunnel excavation direction as the front). The inner wall of the drainage hole 2 is provided with an anti-seepage layer 3, and the drainage hole 2 is used to discharge the overflowing water from the leading drainage hole 1, so as to prevent groundwate...

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Abstract

The invention relates to the technical field of tunnel construction, in particular to a water-rich tunnel construction pre-drainage structure. According to the technical scheme, the water-rich tunnelconstruction pre-drainage structure comprises pre-drainage holes; the pre-drainage holes extend to the rock groundwater in the tunneling direction; the pre-drainage holes are located in a rock body onthe side of a tunnel; the pre-drainage structure further comprises drainage holes located in the rock body on the side of the tunnel; the drainage holes communicate with the pre-drainage structure; the drainage holes and the pre-drainage holes are sequentially formed in the tunneling direction; the inner side walls of the drainage holes are provided with water-proof layers; and the drainage holesare used for draining water overflowing from the pre-drainage holes. Automatic pre-drainage of groundwater in the water-rich rock body during tunnel construction can be achieved, and construction progress and construction safety are ensured; and the pre-drainage structure has the characteristics of simple structure, convenient construction, safety and reliability.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to an advanced drainage structure and construction method for water-rich tunnel construction. Background technique [0002] In recent years, with the rapid development of tunnel engineering technology, my country has overcome many engineering technical problems in the fields of water conservancy and hydropower, transportation, municipal, underground engineering and other tunnel engineering, and has achieved remarkable achievements. Tunnel construction needs to open a tunnel in the rock mass. In the tunnel construction of rock mass rich in a large amount of groundwater, water inrush often occurs, causing a series of problems such as project stoppage and extension of construction period. At present, it is mainly used to directly drill advanced drainage holes on the face of the tunnel, so that the water in the rock and soil can flow out from the tunnel floor. Although it c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F16/02
CPCE21F16/02
Inventor 杜潇翔胡亚东蔡斌谭超王能峰
Owner POWERCHINA CHENGDU ENG
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