Water drain structure of deep-buried water-rich fractured zone long-distance tunnel

Abstract

The invention discloses a water drain structure of a deep-buried water-rich fractured zone long-distance tunnel. A water-retaining wall is arranged in the position close to a parallel adit outlet segment tunnel face, the lower portion of the first water-retaining wall is not sealed so that a water outlet can be formed, surrounding rock between the parallel adit outlet segment tunnel face and the first water-retaining wall is reinforced through anchor rods, a second water-retaining wall is arranged on the side, close to an outlet, of a transverse hole in a parallel adit, and a third water-retaining wall is arranged on the side, close to the outlet, of the transverse hole in a main hole; and drainage ditches are formed in the left and right sides of a tunnel segment between the first water-retaining wall and the second water-retaining wall and in the left and right sides of the transverse hole correspondingly, a drainage channel connected with a natural river is built in the outlet of the transverse hole, and water drain holes connecting an outlet segment with an excavated segment are drilled in a to-be-excavated segment of the parallel adit. The water drain structure is specially used for fast water draining of special tunnels with the length of non-through to-be-excavated segments reaching over 800 meters, wherein the daily water inflow is large, and resident areas or factorieswhere water drain is unfit are located below outlets.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a drainage structure for a long tunnel in a deep buried water-rich broken zone. Background technique [0002] Horizontal directional drilling rigs started in the late 1970s. With the continuous improvement and perfection of technology and equipment, they are moving toward large-scale, miniaturized, hard rock operations, mechanical automation (including self-contained anchoring systems, automatic stacking of drill pipes) and extraction, drill pipe connection automatic lubrication, anti-shock system and other automatic operation functions), ultra-depth guidance monitoring and other trend development. At present, directional drilling is mainly used in the laying of pipeline projects. Directional drilling is used to cross obstacles including highways, high-speed railways, large rivers, reservoirs, ponds, swamps, etc. It has the advantages of short construction...

AI Technical Summary

Problems solved by technology

However, the excavation of the tunnel has not been completed, and the remaining 952m between the inclined shaft and the horizontal guide of the exit section has not yet been penetrated

The section to be excavated runs through the fault fracture zone 4, the main tunnel 1 is higher than the horizontal guide 2, and the main tunnel 1 and the horizontal guide 2 have a descending slope along the A direction, and the water in the excavated section of the tunnel has flooded to the inclined shaft 5 At the wellhead, the fixed pump station at 5 inclined shafts cannot be used for pumping and drainage

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