缓倾角层理各向异性岩体隧道稳定性的物理模型试验研究

Abstract

Abstract:

Wide contribution of layered rockmass cannot be avoided in underground construction. Based on the Gonghe tunnel in Yuxiang Highway a physical model for layered rockmass is made adopting elastobrittle simulated material which is developed independently. Loading through the large scale real triaxial geotechnical engineering testing machine, the configuration trait of secondary stress and failure mechanisms of layered rockmass tunnel with low inclination angle are presented. Various failure mechanisms present in various place via the strain in surrounding rock, inner video and failure configuration around the tunnel. The test provides a quantitative evaluating index for safety storage with overload coefficient. The failure in the test is consistent with the practical tunnel which validates the anisotropic model and provides a foundation for the research on reinforcing mechanism and reinforcing design of tunnels in layered anisotropy rockmass.

Key words: physical model test, large scale real triaxial physical model testing machine, model simulation material, elastobrittle, layered rockmass, overload coefficient

CLC Number:

O411

LI Dan, XIA Bin-wei, CHEN Hao, BAI Shi-wei. Research on stability of tunnel in anisotropic layered rockmass with low inclination angle bedding by model test[J]., 2009, 30(7): 1933-1938.

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Research on stability of tunnel in anisotropic layered rockmass with low inclination angle bedding by model test

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