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MODERN TUNNELLING TECHNOLOGY 2019, Vol. 56 Issue (4) :69-73    DOI:
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Analysis on the Causes of the Large Deformation of Surrounding Rocks of Milashan Tunnel in Tibet
(1 CCCC Second Highway Consultants Co. Ltd., Wuhan 430056; 2 School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070)
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Abstract Large deformation of tunnel surrounding rocks is a sophisticated problem during tunnel construction. Taking the large deformation of surrounding rocks of Milashan tunnel in Tibet for example, the causes of large deformation were studied by site investigation and experimental analysis. The results show that properties of tuff such as poor weather resistance and softening upon meeting water are the two radical reasons of large deformation, and improper construction technology is a main inducement. A treatment scheme and control measures were proposed based on an analysis of causes of large deformation of Milashan tunnel
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WU Shuyuan1 CHENG Yong1 XIE Quanmin2 LIU Jiguo1 CHEN Biguang1
Keywords： Milashan tunnel；Tuff   Large deformation of surrounding rock；Formation mechanism；Disaster control     
Abstract： Large deformation of tunnel surrounding rocks is a sophisticated problem during tunnel construction. Taking the large deformation of surrounding rocks of Milashan tunnel in Tibet for example, the causes of large deformation were studied by site investigation and experimental analysis. The results show that properties of tuff such as poor weather resistance and softening upon meeting water are the two radical reasons of large deformation, and improper construction technology is a main inducement. A treatment scheme and control measures were proposed based on an analysis of causes of large deformation of Milashan tunnel
Keywords： Milashan tunnel；Tuff,   Large deformation of surrounding rock；Formation mechanism；Disaster control     
Cite this article:   
WU Shuyuan1 CHENG Yong1 XIE Quanmin2 LIU Jiguo1 CHEN Biguang1 .Analysis on the Causes of the Large Deformation of Surrounding Rocks of Milashan Tunnel in Tibet[J]  MODERN TUNNELLING TECHNOLOGY, 2019,V56(4): 69-73
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