Treatment method for non-convergence type collapse of tunnel

Abstract

The invention discloses a treatment method for non-convergence type collapse of a tunnel, which relates to the field of underground engineering and solves the problem that treatment of the non-convergence type collapse in an existing method is unreasonable, non-operable and exists a safety risk. A technical scheme employed by the treatment method is that: the treatment method for the non-convergence type collapse of the tunnel includes the following steps: 1. backfilling a collapse section and a collapse affected section to quickly restrain expansion of tunnel collapse; 2. reinforcing the collapse affected section to prevent collapse from expanding and provide safety guarantee for subsequent collapse treatment; 3. investigating a condition of the tunnel collapse; and 4. performing treatment on a tunnel collapse section. Wherein, the treatment of the tunnel collapse section is that collapse slag in a certain range outside an excavation outline of the tunnel collapse section is consolidated and grouted to form a pre-reinforcement arch, then excavation is performed, a construction steel arch and shotcrete and rock bolt support form a reinforcing arch; and after initial support and excavation of the tunnel in the collapse section are circularly completed, drainage holes are drilled, and then a waterproof board and secondary concrete lining are constructed. The treatment method scientifically and reasonably treats the non-convergence type collapse.

Description

technical field [0001] The invention relates to the field of underground engineering, in particular to a treatment method for tunnel collapse. Background technique [0002] Tunnel landslides can be divided into "convergent landslides" and "non-convergent landslides". Among them, the convergent type of landslide is: after the tunnel collapses to a certain extent, the collapse cavity will be stable and will not continue to collapse; the non-convergent type of landslide is: the tunnel collapse continues continuously, and the collapse cavity is getting bigger and bigger. A landslide is a collapse from the lower part of the mountain to the surface. [0003] During the excavation and initial support construction of a new tunnel project, if the support is not timely or the construction If the method is not proper, the excavated tunnel arch near the face of the tunnel is prone to landslides. If the landslides are not treated properly, there will be continuous landslides with uncon...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a treatment method for non-convergent landslides in tunnels, which solves the problems of unreasonable treatment of non-convergent landslides in existing methods, lack of operability and safety risks

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