CN102635402A - Siphon drainage method for tunnel wall water seepage disposal by using dipping borehole - Google Patents

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

Siphon Drainage Method of Descent Bore Hole for Water Seepage Treatment in Tunnel Wall

technical field

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

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.

Currently commonly used tunnel water seepage treatment methods: general water seepage points, commonly used quick-setting material grouting to block water, use encrypted horizontal and vertical drainage holes, and add vertical blind ditch for drainage, or use drainage pipe holes to insert pipes for drainage, Large-scale water seepage is generally dealt with by grouting and water blocking in the seepage section. 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.

Contents of the invention

The object of the present invention is to provide a down-dip borehole siphon drainage method for water seepage treatment on the tunnel wall in view of the deficiencies in the prior art. The invention uses down-dip boreholes to naturally collect groundwater in surrounding rocks, and solves the need for drainage after the tunnel lining waterproof layer is damaged through siphon drainage.

The technical solution adopted to solve the problem is: a down-dip borehole siphon drainage method for water seepage treatment on the tunnel wall. The relative height difference at the bottom is less than 8m; one end of the siphon drainage pipe 3 is inserted into the water storage pipe at the bottom of the hole, and the water storage pipe at the bottom of the hole together with the siphon drainage pipe is inserted into the bottom of the borehole; the other end of the siphon drainage pipe is inserted into the water storage tank of the diversion pipe; the surrounding rock The infiltrating groundwater enters the down-dipping borehole, causing the water level in the hole to rise, and a siphon process occurs. The siphon drainage pipe discharges the groundwater in the borehole into the diversion pipe in real time, and the diversion pipe then guides the water into the drainage ditch of the tunnel and flows out of the tunnel. . the

The beneficial effects of the present invention are: the leakage is controlled by means of dredging rather than blocking to avoid the spread of groundwater seepage range, the construction of water seepage treatment on the side wall of the tunnel is fast and convenient, and the lining and anti-seepage layer will not be damaged due to the anti-seepage treatment. as a result of.

Description of drawings

Fig. 1 is a schematic diagram of the implementation of the down-dipping borehole siphon drainage method for water seepage treatment on the tunnel wall of the present invention.

In the figure: borehole 1, water storage pipe at the bottom of the hole 2, siphon drainage pipe 3, water level control 4, diversion pipe 5, tunnel drainage ditch 6.

Detailed ways

The principle of the present invention is to drill the water seepage point on the side wall of the tunnel to form a downwardly inclined borehole, so that the surrounding rock groundwater near the water seepage point can naturally seep into the borehole, and keep the relative height difference between the hole opening and the bottom of the borehole less than 8m. The siphon drainage pipe is drawn from the bottom of the inclined borehole to a certain position on the wall and fixed so that the elevation of the water inlet and outlet of the siphon drainage pipe is basically the same. The siphon process occurs, and the groundwater in the borehole is discharged into the aqueduct in real time, and then enters the drainage ditch in the tunnel to flow out of the tunnel.

The purpose and effects of the present invention will become more apparent by describing the present invention in detail below with reference to the accompanying drawings.

As shown in Figure 1, the down-dip borehole siphon drainage method of the tunnel wall water seepage treatment of the present invention is specifically: drill at the tunnel wall seepage point to form a down-dip borehole 1, and the relative height difference between the bore hole and the bottom of the hole is less than 8m; one end of the siphon drainage pipe 3 is inserted into the water storage pipe 2 at the bottom of the hole, and the water storage pipe 2 at the bottom of the hole is inserted into the bottom of the borehole 1 together with the siphon drainage pipe 3; the other end of the siphon drainage pipe 3 is inserted into the water storage tank of the diversion pipe 5; The groundwater infiltrated by the rock enters the down-dip borehole 1, causing the water level in the hole to rise, and a siphon process occurs. The siphon drainage pipe 3 discharges the groundwater in the borehole 1 into the diversion pipe 5 in real time, and the diversion pipe 5 guides the water into the tunnel. The tunnel flows out of the gutter.

By applying the method of the present invention, the seepage is controlled by dredging instead of blocking to avoid the spread of the groundwater seepage range, and the construction of the tunnel side wall seepage treatment is fast and convenient, and no adverse consequences will be caused by the damage of the lining anti-seepage layer due to the anti-seepage treatment .

Claims (1)

1. A down-dip borehole siphon drainage method for water seepage treatment on the tunnel wall, characterized in that the method specifically comprises: drilling at the seepage point of the tunnel wall to form a down-dip borehole (1), the borehole and the hole The relative height difference at the bottom is less than about 8m; one end of the siphon drainage pipe (3) is inserted into the bottom water storage pipe (2), and the bottom water storage pipe (2) together with the siphon drainage pipe (3) is inserted into the bottom of the borehole (1); siphon drainage The other end of the pipe (3) is inserted into the water storage tank of the diversion pipe (5); the groundwater infiltrated from the surrounding rock enters the down-dipping borehole (1), causing the water level in the hole to rise, and a siphon process occurs, and the siphon drainage pipe (3) will The groundwater in the borehole (1) is discharged into the diversion pipe (5) in real time, and the diversion pipe (5) guides the water into the drainage ditch of the tunnel to flow out of the tunnel.

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