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Radial Resistance Controllable Supporting Structure and Supporting Method Adapting to Large Deformation Tunnel

A controllable, large-deformation technology, used in tunnels, tunnel linings, earth-moving drilling, etc., can solve problems such as poor adaptability to non-uniform deformation conditions, inability to effectively control radial support resistance, and uneconomical construction.

Active Publication Date: 2020-10-30
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The resistance limiter (yield unit) releases the circumferential displacement. For super-large deformation tunnels, since the displacement release of a single resistance limiter (yield unit) is limited, more resistance limiters (yield units) are required for displacement release. resulting in uneconomical construction
The use of a buffer material layer to release the displacement of the surrounding rock cannot effectively control the radial support resistance, and its adaptability to the working conditions of non-uniform deformation is not strong

Method used

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  • Radial Resistance Controllable Supporting Structure and Supporting Method Adapting to Large Deformation Tunnel
  • Radial Resistance Controllable Supporting Structure and Supporting Method Adapting to Large Deformation Tunnel

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] The purpose of the present invention is to provide a radial resistance controllable support structure and support method suitable for large deformation tunnels, so as to solve the problems in the prior art, so that the support structure can adapt to super large deformation tunnels and non-uniform deformation The large deformation tunnel can evenly release the surrounding rock pressure, improve the safety of the tunnel, and the cost is low.

[0027] The ...

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Abstract

The invention discloses a radial resistance controllable support structure and a support method suitable for large-deformation tunnels, and belongs to the technical field of tunnel engineering construction. Including the initial sprayed concrete layer, air cushion and steel plate, the initial sprayed concrete layer is set on the surface of the surrounding rock in the tunnel, the air cushion is fixed on one side of the steel plate, and the side of the steel plate provided with the air cushion is close to the initial sprayed concrete layer, The arch foot of the steel plate is fixed to the surrounding rock, and the inflatable cushion is inflated to a safe pressure value. The side of the steel plate that is not in contact with the inflatable cushion is provided with a secondary lining; the inflatable cushion is equipped with an inflation valve and a constant pressure deflation valve. The invention enables the supporting structure to adapt to super-deformed tunnels and non-uniformly deformed large-deformed tunnels, evenly releases surrounding rock pressure, improves tunnel safety, and reduces costs.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering construction, in particular to a radial resistance controllable support structure and a support method suitable for large deformation tunnels. Background technique [0002] At present, for the release of surrounding rock displacement in large-deformation tunnels, resistance limiters (yield units) or buffer material layers are mostly used to release the deformation and pressure of surrounding rock. The resistance limiter (yield unit) releases the circumferential displacement. For super-large deformation tunnels, since the displacement release of a single resistance limiter (yield unit) is limited, more resistance limiters (yield units) are required for displacement release. This leads to uneconomical construction. The use of buffer material layer to release the displacement of surrounding rock cannot effectively control the radial support resistance, and its adaptability to the working ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/10E21D11/18
Inventor 章慧健苗龙刚朱勇郑余朝
Owner SOUTHWEST JIAOTONG UNIV
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