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MODERN TUNNELLING TECHNOLOGY 2014, Vol. 51 Issue (4) :39-45    DOI:
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Failure Characteristics and the Mechanical Effect of Mica Schist in an Anchored Tunnel
(1 Faculty of Engineering, China University of Geosciences, Wuhan 430074; 2 Engineering Research Center of Rock-Soil Drilling & Excavation and Protection, Ministry of Education, Wuhan 430074)
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Abstract  In a deep mica schist stratum, the anchor bolt support structure of a tunnel will frequently fail, resulting in large surrounding-rock deformation and endangering the safety of tunnel construction and reliability of the structure. Combining field experiments and numerical calculations, the characteristics of stress-strain and forms of loosening circles around a tunnel in a mica schist stratum are analyzed and the stress relationship and failure characteristics of the anchor-rock complex in a mica schist stratum are studied, providing a reference for support design, rock deformation control, and disaster prevention in mica schist and stratified anisotropic rock masses.
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ZUO Chang-Qun-1
2
Ding-Shao-Lin-1
LIU Dai-Guo-1
Sun-Jin-Shan-1
XU
YING 1
Keywords： Highway tunnel   Mica schist   Mortar anchor   Large deformation   Failure mechanism     
Abstract： In a deep mica schist stratum, the anchor bolt support structure of a tunnel will frequently fail, resulting in large surrounding-rock deformation and endangering the safety of tunnel construction and reliability of the structure. Combining field experiments and numerical calculations, the characteristics of stress-strain and forms of loosening circles around a tunnel in a mica schist stratum are analyzed and the stress relationship and failure characteristics of the anchor-rock complex in a mica schist stratum are studied, providing a reference for support design, rock deformation control, and disaster prevention in mica schist and stratified anisotropic rock masses.
Keywords： Highway tunnel,   Mica schist,   Mortar anchor,   Large deformation,   Failure mechanism     
published: 2013-08-08
Cite this article:   
ZUO Chang-Qun-1, 2 , Ding-Shao-Lin-1 etc .Failure Characteristics and the Mechanical Effect of Mica Schist in an Anchored Tunnel [J]  MODERN TUNNELLING TECHNOLOGY, 2014,V51(4): 39-45
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http://www.xdsdjs.com/EN/      或     http://www.xdsdjs.com/EN/Y2014/V51/I4/39
　
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