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Large deformation control method for large-span tunnel of chlorite schist

A control method and deformation control technology, applied in tunnels, tunnel linings, underground chambers, etc.

Active Publication Date: 2017-12-15
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is currently no large deformation classification scheme and corresponding control measures for large-span tunnels in chlorite schist strata. Based on the physical and mechanical properties of schist, determine the large deformation classification scheme and corresponding control measures for long-span tunnels in chlorite schist formation

Method used

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  • Large deformation control method for large-span tunnel of chlorite schist
  • Large deformation control method for large-span tunnel of chlorite schist
  • Large deformation control method for large-span tunnel of chlorite schist

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Embodiment 1

[0062] This embodiment provides a large deformation control method for large-span tunnels in chlorite schist strata. structural plane occurrence and groundwater conditions, etc.), combined with the large deformation magnitude and large deformation control effect under different surrounding rock conditions at the tunnel site, the large deformation grades of long-span tunnels in chlorite schist strata are divided into five grades, And the five large deformation levels from high to low are: extremely severe large deformation, severe large deformation, moderate large deformation, slight large deformation and no large deformation; for each deformation level, determine the corresponding deformation control measures for long-span tunnels , to ensure the safety and stability of the tunnel support structure and avoid tunnel deformation and encroachment.

[0063] Among them, the surrounding rock condition of the tunnel corresponding to the extremely serious deformation is: the surroundi...

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Abstract

The invention belongs to the technical field of tunnel engineering, and particularly relates to a large deformation control method for a large-span tunnel of chlorite schist. According to the method, the large deformation of large-span tunnel of chlorite schist is divided into five deformation levels according to the surrounding rock conditions of the tunnel; and for each deformation level, corresponding large-span tunnel deformation control measures are determined to ensure the safety and stability of the tunnel supporting structure and avoid the deformation of the tunnel.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering, and in particular relates to a large deformation control method for a long-span tunnel in a chlorite schist formation. Background technique [0002] Chlorite schist is a kind of regional metamorphic rock with chlorite as the main mineral component. It has a flaky structure, disintegrates when exposed to water and is easy to soften. It is a typical soft rock with low bearing capacity and strong deformation capacity. The relatively complete surrounding rock exposed at the initial stage will also undergo large deformation in a short period of time, making it difficult to stabilize itself. If the integrity of the exposed surrounding rock is poor, direct excavation will not be able to maintain the initial stability of the surrounding rock, and even large-scale landslides will occur during the excavation process, which will bring great difficulties to the tunnel construction. Especially for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/04E21D11/14E21D11/18E21D11/10
CPCE21D9/001E21D9/04E21D11/10E21D11/107E21D11/14E21D11/18E21D11/105E21D9/14
Inventor 陈建勋陈丽俊罗彦斌黄沛张朝轩秦蒙恩
Owner CHANGAN UNIV
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