Tunnel drainage disease prevention processing method and system

Abstract

The invention discloses a tunnel drainage disease prevention processing method, which comprises the steps of obtaining the water pressure at each point on the outer surface of a secondary lining in ablocking section in consideration of the actual longitudinal flow of underground water along the space between an initial support and the secondary lining, determining the drainage amount of a circumferential blind pipe, further determining the diameter and spacing of a newly laid longitudinal blind pipe (5) and a newly laid circumferential blind pipe (6), and finally laying the newly laid longitudinal blind pipe (5) and the newly laid circumferential blind pipe (6) in surrounding rocks at the outer side of the initial support of the tunnel, and leading the underground water outside the tunnellining to a ditch at the inner side of the tunnel by using the blind pipes, thereby fundamentally reducing the external water pressure of the lining. The invention further discloses an existing tunnel drainage disease prevention processing system, which comprises an existing tunnel main body and a novel drainage system, wherein the novel drainage system includes a newly laid longitudinal blind pipe (5) and a newly laid circumferential blind pipe (6), thereby solving a problem that the lining bears high water pressure after the blockage caused by small diameter of the original drainage blind pipe and the aging of materials, and ensuring the structural safety of the tunnel.

Description

Technical field [0001] The invention belongs to the technical field of traffic engineering waterproofing and drainage, and more specifically, relates to a tunnel waterproofing and drainage disease treatment method and system. Background technique [0002] In our country’s large-scale operation of mines and mountain tunnels, due to various reasons, drainage facilities such as blind drainage pipes and drainage ditches are often blocked. In mountain tunnels with developed groundwater, the initial support shotcrete will be corroded during the process of groundwater seepage, and soft water erosion or dissolution erosion of the cement stone will occur, causing holes in the cement stone, reducing the compactness and other properties of the cement stone. The calcium hydroxide in it Carried away by the water flow, it crystallizes and settles again in the drainage system. For tunnel projects in karst areas, the karst groundwater seepage and crystallization effect the precipitation and cry...

AI Technical Summary

Problems solved by technology

When the drainage system is clogged, it is usually necessary to clean the longitudinal blind pipes, side ditches and central gutters to reduce the water pressure on the lining. Connected into a whole, the strength is high, and it is difficult to clean, resulting in smaller and smaller drainage sections, serious aging of materials, and difficulty in dredging blind pipes. At present, for example, drainage measures such as cutting grooves and buried pipes to control the leakage of arches have been solved. The problem of local water damage in the tunnel has been solved, but it has not fundamentally reduced the external water pressure of the lining, that is, it cannot play the role of "pressure relief"

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