Magnetic force adjustable gate type fluid lining surrounding rock pressure relief device and construction method

Abstract

The invention discloses a magnetic force adjustable gate type fluid lining surrounding rock pressure relief device and a construction method. The device comprises a tunnel lining, wherein channel steel is anchored on the inner side wall of the tunnel lining through a primary lining anchor rod; a fluid filler is filled between the channel steel and the tunnel lining; a plurality of fluid discharging holes are formed in different positions of the channel steel; and stress self-feedback type pressure relief valves for automatic starting and discharging the fluid filler are arranged at the positions of the fluid discharging holes. The device can remarkably solves the following problems that the existing surrounding rock tunnel engineering is large in soft rock creep value and is long in deformation time, as a result, the construction period is long, the ground stress nonuniformity is remarkable, a supporting structure is stressed in an extremely non-uniform manner, and the high ground stress soft rock tunnel is high in construction cost, so that the working efficiency is greatly improved, and the discharging degree and range are precisely controlled; and moreover, the structure is simple, the material is available, the operation is simple, construction is fast, and the experimental cost period is greatly shortened.

Description

technical field [0001] The invention relates to the technical field of lining surrounding rock construction, in particular to a door-type fluid lining surrounding rock pressure relief device with adjustable magnetic force and a construction method, which is suitable for research in fields such as engineering tunnels, engineering roadways, and mining cavern support. Background technique [0002] The following problems exist in deep high-in-situ stress schist caverns: (1) The creep of soft rock is large and the deformation time is long, resulting in a long construction period; the displacement convergence time of high-in-situ stress soft rock tunnels can be as long as 3 years, and the displacement is large; ( 2) The inhomogeneity of the ground stress is significant, resulting in extremely uneven stress on the support structure; because the ground stress of the soft rock tunnel varies with the direction, the stress distribution of the surrounding rock after the excavation of the...

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Problems solved by technology

[0003] In view of the defects existing in the prior art, the object of the present invention is to provide a door-type fluid lining surrounding rock pressure relief device with adjustable magnetic force and a construction method, which can significantly solve the problem of large soft rock creep in the existing surrounding rock tunnel engineering. , Long deformation time, resulting in long construction period, significant inhomogeneity of ground stress, resulting in extremely uneven stress on the support structure; high cost of construction in soft rock tunnels with high ground stress, greatly improving work efficiency, and accurately controlling the degree of release and The scope and structure are simple, the materials are easy to obtain, easy to operate, fast construction, and greatly save the test cost cycle

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