Tunnel intersected grouting and water plugging drilling structure and construction method thereof

Abstract

The invention provides a tunnel intersected grouting and water plugging drilling structure and a construction method thereof. The drilling structure comprises two drainage holes and two grouting holes; the two drainage holes are arranged on two sides of a crack at the arch part of a tunnel is an intersected mode; and the two grouting holes are arranged on two sides of the crack at the arch part ofthe tunnel in an intersected mode, and are positioned above the two grouting holes. The construction method comprises the following steps: after the position of the crack for water leakage at the arch part of the tunnel is determined, the two drainage holes and the two grouting holes are arranged on the two sides of the crack in an intersected mode; first orifice pipes and first gate valves are mounted in the drainage holes; second orifice pipes and second gate valves are mounted in the grouting holes; at least one first gate valve is opened for water leakage; two second gate valves are opened for grouting the two grouting holes; one of the first gate valves is closed, and the drainage hole with the other first gate valve is grouted; and the closed first gate valve is opened, and the drainage hole thereof is grouted. The drilling structure is excellent in grouting and water plugging effect, and guarantees no water leakage phenomenon in later building.

Description

technical field [0001] The invention relates to the technical field of tunnel crack repair, in particular to a tunnel cross-type grouting water blocking drilling structure and a construction method thereof. Background technique [0002] During tunnel construction, due to passing through the surrounding rocks, soluble rocks, water-rich ends, broken cracks, etc., there will often be water leakage after the initial support construction of the tunnel is completed, and the parts where water leakage occurs are usually It consists of four parts: tunnel arch, spandrel, side wall and tunnel bottom. Among these four parts, the seepage water in the arch and the bottom of the tunnel is the most difficult to deal with. For the treatment of leakage water in the tunnel arch, the traditional treatment method is grouting at the leakage water point, but the effect of on-site implementation is not good. The reason is that the grouting hole layout is unreasonable and the water-filled grouting ...

AI Technical Summary

Problems solved by technology

For the treatment of leakage water in the tunnel arch, the traditional treatment method is grouting at the leakage water point, but the effect of on-site implementation is not good. The reason is that the grouting hole layout is unreasonable and the water-filled grouting is difficult. aspects

The traditional treatment method uses radial drilling and grouting, and the grouting range cannot be targeted to block the leakage point. At the same time, after the water is discharged from the borehole, the construction of water-filled grouting is difficult and the process is relatively complicated, resulting in on-site water blocking treatment. After that, the effect of grouting water blocking is not ideal

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