Tunnel siphon water drainage system and construction method thereof

Abstract

The invention relates to a tunnel siphon water drainage system and a construction method thereof. The water drainage system comprises a drilling hole which is formed in a water seepage point in the wall of a tunnel, a water reservoir arranged on the bottom of the drilling hole, a siphon sleeve communicated with the water reservoir, a water storage barrel and a longitudinal water drainage ditch, wherein an included angle between the drilling hole and a vertical direction is 45-75 degrees; one end of the siphon sleeve is inserted into the drilling hole and is communicated with the water reservoir, and the other end of the siphon sleeve is vertically guided out from the drilling hole, and is arranged in the water storage barrel; a water outlet of the siphon sleeve is lower than the water reservoir by 40-60 cm; during construction, drilling is firstly carried out, the water reservoir and the water storage barrel are arranged, and the two ends of the siphon sleeve are separately inserted into the water reservoir and the water storage barrel. Compared with the prior art, the tunnel siphon water drainage system has the advantages that underground water near the water seepage point in the tunnel wall can be discharged timely, power is not needed to be additionally provided in a water drainage process, water drainage flow and a flow process are automatically controlled by water level changes, and smooth water drainage is effectively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of tunnel and underground engineering waterproof and drainage, and relates to a tunnel siphon drainage system and a construction method thereof. Background technique [0002] The tunnel waterproof and drainage design follows the principle of "prevention, drainage, interception, blocking, adapting measures to local conditions, and comprehensive treatment". The existing waterproof and drainage structure is mainly to set geotechnical non-woven fabric and The flexible waterproof layer of the waterproof board, wherein the waterproof board also serves as the isolation layer. In the actual use process, there are certain defects in the waterproof board isolation layer of this structure. For example, in the tunnels of the IV, V, and VI surrounding rocks, as time goes by, the tiny particles in the surrounding rocks accumulate day by day, making the geotextile non-woven The cloth was hardened and could not filter, so ...

AI Technical Summary

Problems solved by technology

In the actual use process, there are certain defects in the waterproof board isolation layer of this structure. For example, in the tunnels of the IV, V, and VI surrounding rocks, as time goes by, the tiny particles in the surrounding rocks accumulate day by day, making the geotextile non-woven The cloth is hardened and cannot filter, so that the water behind the tunnel lining cannot flow smoothly into the drain pipe

The survey found that most of the water seepage in the tunnel lining is due to the fact that the drainage pipes installed in the lining do not produce water, which cannot meet the drainage requirements, and sedimentation occurs in the pipes, the water behind the lining corrodes the lining, or the amount of water accumulated behind the tunnel lining increases, and the water pressure increases. , resulting in water seepage or cracking at weak lining quality

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