Method for processing tunnel collapse by using roof-contacted shield bracket

Abstract

The invention discloses a method for processing tunnel collapse by using a roof-contacted shield bracket, and relates to the technical field of tunnel engineering. The roof-contacted shield bracket isused for construction, and can adapt to depths of different collapse cavities. The method comprises the steps that a shield, stand columns and supporting columns are mounted to form a combined bracket which is moved to a construction platform, the combined bracket is jacked through an individual hydraulic supporting column installed and placed below the combined bracket, and the height of a beamis larger than the height of an outer contour of a primary branch arch. Fixed supporting columns are initiatively in touch with the surfaces of the collapse cavities and bear the surfaces of the collapse cavities, and then movable supporting columns are lifted to the tops of the collapse cavities and bear the tops of the collapse cavities. The primary branch arch, a welding primary branch arch andthe supporting columns are mounted. The supporting columns invading into the primary branch arch are cut off, and the individual hydraulic supporting column is withdrawn after shield loads are switched to stress of a primary branch canopy frame. Exhaust pipes and filling material pumping pipes are mounted, and filling materials are pumped to the space of the collapse cavities. The method has theadvantages of high level of mechanization, large bracket bearing 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

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