Siphon drainage method for tunnel wall water seepage disposal by using dipping borehole

Abstract

The invention discloses a siphon drainage method for tunnel wall water seepage disposal by using a dipping borehole. A dipping borehole is drilled in a water seepage point of a tunnel wall, and the relative altitude difference between the orifice and the hole bottom of the borehole is less than 8m; one end of a siphon drain pipe 3 is inserted in a hole-bottom standpipe, and the hole-bottom standpipe is inserted in the bottom of the borehole together with the siphon drain pipe; the other end of the siphon drain pipe is inserted in a water storage tank of a diversion pipe; underground water seeped from surrounding rock enters the dipping borehole to cause the water level to rise in the borehole and also cause a siphon process, the underground water in the borehole is drained to the diversion pipe in real time through the siphon drain pipe, and the water is guided to a drainage ditch of a tunnel through the diversion pipe and flows out of the tunnel. The method disclosed by the invention disposes the water seepage by dredging instead of blocking, thus avoiding the diffusion of an underground water seepage range. The construction of the tunnel side wall water seepage disposal is rapid and convenient, and a bad effect caused by a damaged lining impermeable layer due to the seepage-proofing disposal can be avoided.

Description

technical field [0001] The invention relates to a drainage treatment technology for water seepage in a tunnel wall, in particular to a down-dip borehole siphon drainage method for water seepage treatment in a tunnel wall. Background technique [0002] After the concrete lining of the tunnel is completed, the surrounding fissure water is sealed outside the concrete lining. When there is a defect in the waterproof layer or the lining concrete, local groundwater seepage will occur. Water seepage in the tunnel will cause water accumulation and icing on the road, causing vehicles to slip while driving; water seepage erodes the inner surface of the lining, reducing the brightness and visibility of lighting in the tunnel; water seepage damages the inner structure of the tunnel lining concrete and surrounding rock, shortening the service life of the tunnel. [0003] Currently commonly used tunnel water seepage treatment methods: general water seepage points, commonly used quick-sett...

AI Technical Summary

Problems solved by technology

The main problems: grouting and water blocking will cause the groundwater in the surrounding rock to leak from the weak places near the periphery of the grouting area; the water collection capacity of the drainage pipes and drainage holes is poor, and they are prone to blockage failure; the horizontal and vertical drainage holes will be damaged The integrity of the waterproof layer laid between the primary support and the secondary lining allows groundwater to flow along the waterproof layer; the process of water seepage disposal technology is complicated and the construction period is long, which affects the normal use of the tunnel

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