A Long Tunnel Drainage System

Abstract

The main measure of tunnel drainage is through the drainage facilities and structural measures of the tunnel. The accumulated water on the back of the lining and under the pavement structure layer is discharged into the side ditch of the tunnel, and then the accumulated water flows out of the tunnel from the side ditch, so as to reduce the surrounding rock area of ​​the tunnel. The purpose of the groundwater table is to reduce the water pressure on the back of the lining. The invention provides a drainage system for a long tunnel. Drilling the surrounding rock of the tunnel forms a down-dipping borehole. A drainpipe is placed in the borehole. The water inlet of the drainpipe is at the bottom of the borehole. Connection, the starting device is placed in the side ditch, the starting device is fixed to the bottom of the side ditch, the ball valve chamber A and the ball valve chamber B are connected to the upper chamber, the drain pipe is connected to the ball valve chamber A, one end of the outlet pipe A is connected to the drain pipe, and the outlet The other end of the water pipe A is put into the side ditch, the rotating shaft is installed in the lower chamber, and the connecting rod is connected between the running wheel and the plug body.

Description

technical field [0001] The invention belongs to the field of tunnel engineering, and in particular relates to a drainage system and method for long tunnels, and is especially suitable for drainage of surrounding rocks in mountain tunnels. Background technique [0002] The construction of railways and highways will pass through tunnels under complex terrain and geological conditions, and the leakage of tunnels is a problem that plagues tunnel operation and maintenance. The long-term leakage of tunnel water will cause erosion and damage to the tunnel lining, and the leakage water will also have a softening effect on the surrounding rock of the tunnel, reducing the strength of the surrounding rock and causing the surrounding rock to become unstable and damaged. Tunnel seepage water dripping onto the road surface will cause water accumulation or ice on the road surface, affecting traffic operation. The current drainage measures have great damage to the integrity of the lining, ...

AI Technical Summary

Problems solved by technology

[0005] The invention aims at the defect that the siphon drainage method in the prior art is used for tunnel drainage, and the siphon effect is suspended due to the decrease of the underground water level of the surrounding rock of the tunnel, and the vacuum degree in the siphon pipe is reduced, so that the siphon effect is difficult to recover by itself.

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