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2011•Journal of University of South ChinaRequires access

Analysis on the Excavation and Support of High Stress Soft Surrounding Rock Tunnel Considering Time-space Effect

Yong Liu

Open publisher page 1 citations

Abstract

This paper is based on the high stress soft rock tunnel in Hunan.The space-time of the construction process is analyzed with the finite element software ABAQUS,and the scope and size of to the surrounding rock is studied.The results show that:the stability of the soft surrounding rock is greatly affected by the space effect and time effect.During the process of constructing the tunnel in high stress soft rock,the first support structure should be established as soon as possible in order to improve the self-bearing capability of the surrounding rock.And the secondary support structure must be established when the deformation of the surrounding rock keeps stable to suppress the large deformation of surrounding rocks for the rheological properties of soft rock.

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What this paper is about

This paper is based on the high stress soft rock tunnel in Hunan.The space-time of the construction process is analyzed with the finite element software ABAQUS,and the scope and size of to the surrounding rock is studied.The results show that:the stability of the soft surrounding rock is greatly affected by the space effect and time effect.During the process of constructing the tunnel in high stress soft rock,the first support structure should be established as soon as possible in order to improve the self-bearing capability of the surrounding rock.And the secondary support structure must be established when the deformation of the surrounding rock keeps stable to suppress the large deformation of surrounding rocks for the rheological properties of soft rock.

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Available abstract

This paper is based on the high stress soft rock tunnel in Hunan.The space-time of the construction process is analyzed with the finite element software ABAQUS,and the scope and size of to the surrounding rock is studied.The results show that:the stability of the soft surrounding rock is greatly affected by the space effect and time effect.During the process of constructing the tunnel in high stress soft rock,the first support structure should be established as soon as possible in order to improve the self-bearing capability of the surrounding rock.And the secondary support structure must be established when the deformation of the surrounding rock keeps stable to suppress the large deformation of surrounding rocks for the rheological properties of soft rock.

Key concepts: Excavation, Geotechnical engineering, Deformation (meteorology), Geology, Stress (linguistics), Rheology, Materials science, Composite material

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