Treatment method for non-convergence type collapse of tunnel

A treatment method and technology for tunnels, applied in tunnels, tunnel linings, earth-moving drilling, etc., can solve the problems of safety risks, unreasonable treatment of non-convergent landslides, and inoperability, so as to save the amount of slurry and be practical. Strong performance, ensure the effect of grouting effect

Active Publication Date: 2019-06-07
POWERCHINA CHENGDU ENG
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Problems solved by technology

[0005] The invention provides a treatment method for non-convergent landslides in tunnels, which solves the pro...

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  • Treatment method for non-convergence type collapse of tunnel
  • Treatment method for non-convergence type collapse of tunnel

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with accompanying drawing.

[0036] The processing method of tunnel non-convergence type landslide of the present invention comprises the following steps:

[0037] Step 1: backfill the collapsed section I and the section affected by the collapsed section II with hole slag. After a tunnel collapse occurs, the tunnel can be divided into the collapsed section I, the collapsed affected section II and the non-collapsed section III. If reasonable measures are not taken in time to restrain the tunnel collapse, the tunnel collapse will expand. The first step is to quickly restrain the large deformation of the tunnel and prevent the expansion of the landslide. Step 1: Under the premise of ensuring safety, first, in the shortest time, use the excavated slag from the tunnel to quickly backfill the collapsed tunnel section with construction machinery to form the backfilled slag 12. The filling height of the back...

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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...

Claims

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Application Information

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IPC IPC(8): E21D9/01E21D11/00E21D11/10E21F16/02
Inventor 吴学智
Owner POWERCHINA CHENGDU ENG
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