Open type TBM supporting shoe assisting jacking flow reduction tunnel water plugging method

Abstract

The invention discloses an open type TBM supporting shoe assisting jacking flow reduction tunnel water plugging method. The method comprises the steps that 1, determining a water outlet point of the inner wall of a tunnel, and pretreating the peripheral wall face of the water outlet point of the inner wall of the tunnel; 2, plugging and drainage of the water outlet point on the inner wall of the tunnel; 3, erecting a concrete retaining wall template; 4, pouring a concrete retaining wall; 5, drilling a pressure relief shunting hole; 6, conducting grouting and water plugging on the pressure relief flow distribution hole; and 7, backward grouting and water plugging of the water outlet point of the inner wall of the tunnel. An open type TBM supporting shoe steel structure is utilized, the concrete retaining wall is jacked for flow reduction in an assisted mode, the efficient construction of a 'cement paste and water glass' method is adopted, the plugging is successful and thorough once without leaving the problem, the problem that the tunnel is difficult to construct due to narrow space and limited geographic position of the TBM tunnel is solved, a large amount of labor and material cost is saved, the construction period is shortened, and the efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of tunnel water plugging, and in particular relates to an open-type TBM strut shoe-assisted top pressure flow reduction tunnel water plugging method. Background technique [0002] At present, in the excavation of underground tunnels, a large amount of water gushing is often encountered. In the tunnel excavation construction of the TBM method, especially in the reverse slope (low to high) drainage tunnel, the drainage capacity of the equipment is often not enough to meet the pumping during excavation. The working condition of discharging a large amount of water. Seriously affect the construction progress, even cause serious personal injury accidents, and bring heavy losses to the project construction. Since the TBM equipment occupies most of the space in the cavern, it has caused great difficulties in the water plugging work of the tunnel. At present, in the tunnels constructed by TBM method in China, the g...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an open-type TBM strut shoe-assisted top pressure flow reduction tunnel water plugging method in view of the deficiencies in the above-mentioned prior art, using the open-type TBM strut shoe steel structure to assist the top-press concrete retaining wall Reduce the flow, solve the difficult construction problem caused by the tunnel water blocking due to the small space of the TBM tunnel and the limited geographical location, save a lot of manpower and material costs, shorten the construction period, high efficiency, and easy to promote and use

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