A method for dealing with tunnel collapse by using a top-connected shield support

Abstract

The invention discloses a method for treating tunnel collapse by using a roof-connected shield support, and relates to the technical field of tunnel engineering. It is constructed with a top-connected shield bracket, which can adapt to different depths of collapse cavities. The steps of the method include: installing shield plates, upright columns, support columns, etc. to form a combined support and moving it to the construction platform, lifting the combined support through a single hydraulic prop placed under the combined support, and making the height of the beam greater than the initial support arch Rack outline height. The fixed support column actively contacts the surface of the collapse cavity and bears the load, and then the movable support column is raised to the top of the collapse cavity and bears the load. Install the initial support arch, weld the initial support arch and support columns. After cutting off the support column intruding into the primary support arch and completing the force conversion from the shield load to the primary support scaffold, the single hydraulic support is withdrawn. Install the exhaust pipe and filling material pumping pipe to pump the filling material to the collapsed cavity space. This method has the advantages of high degree of mechanization, large support capacity, safe and efficient construction, and the like.

Description

technical field [0001] The invention relates to the technical field of tunnel and underground engineering construction, in particular to a method for dealing with tunnel collapse by using a roof-connected shield support. Background technique [0002] At present, the common methods for dealing with tunnel collapse accidents mainly include pipe shed method, backfill method, arching method, small conduit grouting method, secondary lining reinforcement method, etc. Among them, the pipe shed method is to drill holes parallel to the tunnel axis along the excavation contour line, and then insert steel pipes of different diameters to form a steel pipe scaffold; Or drilling grouting or backfilling filling materials in the tunnel; the small conduit grouting method is to drive a grouting hole along the outer contour of the tunnel at a certain elevation angle to the front of the tunnel face before excavating the collapse. Small conduits are used to fully fill the surrounding rock voids...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the existing problems in the existing landslide treatment, the present invention provides a method for dealing with tunnel landslides using a top-connected shield support, which solves the problem of insufficient lifting height of a single hydraulic prop when the height of the collapse cavity is large. It is impossible to apply active support to the surface of the collapse cavity, and the technical problem that the top load of the collapse cavity is transferred from the single hydraulic prop to the primary support arch; and the problem of cylinder explosion that may be caused by the sudden collapse of the collapse position; the specific technical plan is as follows

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