鄂西北片岩变形参数各向异性及水敏性研究

doi:10.13722/j.cnki.jrme.2014.s2.072

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Abstract In order to study anisotropic and water sensitivity properties of schist in northwest of Hubei province，Uniaxial compressive test on samples of Wudang Group schist，Tongsheng tunnel，Shiyan—Fangxian expressway，that with schistosity inclination of 0°，45° and 90° respectively is carried out. The results show that：Schist shows obvious anisotropic and water sensitivity properties，in the same state of water content，modulus of elasticity is 90°＞0°＞45°，Poisson ratio of natural state is 45°＞0°＞90°，and saturated state is 90°＞0°＞45°. In the same state of schistosity inclination，the modulus of elasticity of natural samples is larger than saturated samples，and Poisson ratio is related to schistosity inclination. Poisson ratio of saturated sample is equal to native state，when schistosity inclination is 0°，saturated sample is larger than to native state when schistosity inclination is 45°，and saturated sample is less than to native state when schistosity inclination is 90°. The main failure mode is press off，shear and split off when schistosity inclination is 0°，45°and 90° respectively. The main reason that schistosity inclination and water content has significant effect on deformation parameters and deformation and failure mode of schist is that，the different relationship between spatial orientation of schistosity and axial force direction，which caused obvious differences of contribution that of schistosity surface to schist deformation. The results can be reference for design，excavation，reinforcement and water-proof treatment of tunnel.

Key words： rock mechanics schist uniaxial compressive test deformation parameters saturation anisotropy

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	Articles by authors
	WANG Zhangqiong
	YAN Echuan
	HUANG Xiangjia
	WANG Qi

Cite this article:

WANG Zhangqiong,YAN Echuan,HUANG Xiangjia, et al. ANISOTROPIC AND WATER SENSITIVITY PROPERTIES STUDY OF SCHIST DEFORMATION PARAMETERS IN NORTHWEST OF HUBEI PROVINCE[J]. , 2014, 33(S2): 3967-3973.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.s2.072 OR https://rockmech.whrsm.ac.cn/EN/Y2014/V33/IS2/3967

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