EXPERIMENTAL STUDY OF SHEAR DEFORMATION CHARACTERISTICS OF ROCK MASS DISCONTINUITIES
SHEN Mingrong1,2,ZHANG Qingzhao2
(1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University,Shanghai 200092,China;2. Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China)
Abstract:A series of shear tests under different normal stresses are carried out on regular dentate rock mass discontinuities. The mechanical properties of regular dentate rock mass discontinuity under shearing and the main law of its strength and deformation are discussed. Through analyzing the test data,it carries on further investigation on shear deformation curves of the discontinuities under shear stress and shear deformation characteristics of the discontinuities with different roughnesses. Then the constitutive relation of shear deformation characteristics is put forward. Meanwhile,the changes of integrated shear strength parameters of the discontinuities under the shearing condition are researched;and an empirical formula for evaluating the shear strength is set up. The dilatancy characteristics of the discontinuities under shearing are analyzed;and an interpretation of the phenomenon is provided.
沈明荣,张清照. 规则齿型结构面剪切特性的模型试验研究[J]. 岩石力学与工程学报, 2010, 29(04): 713-719.
SHEN Mingrong1,2,ZHANG Qingzhao2. EXPERIMENTAL STUDY OF SHEAR DEFORMATION CHARACTERISTICS OF ROCK MASS DISCONTINUITIES. , 2010, 29(04): 713-719.