(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；
3. School of Geology Engineering and Geomatics，Chang?an University，Xi?an，Shaanxi 710054，China)
Abstract：In order to study the time-dependent deformation behavior of bedding anisotropy green schist of Jinping II hydropower station，this paper investigates the creep behavior of brittle bedding anisotropy rock by uniaxial compression creep experiments in laboratory. Six specimens were prepared with different inclination angles of bedding planes. Loading stress levels were graded 4 classes，and the maximum value of them were all approximately equal to the existing maximum initial geostress. All the strain-time curves of specimens did not exhibit the accelerated creep stage. The instantaneous elastic modulus and steady-state creep rate of specimens were obtained and analyzed based on the experiments data. The results show that the instantaneous elastic modulus of the specimens increases with the increment of stress level；and they were higher when the bedding planes are oblique to the compression direction；and the steady-state creep rate of the specimens increase with the increment of both stress level and the inclination angle of bedding planes；it reaches the maximum value with the inclination angle of the specimen close to the failure angle of rock.
孙 钧. 岩石流变力学及其工程应用研究的若干进展[J]. 岩石力学与工程学报，2007，26(6)：1 081-1 106.(SUN Jun. Rock rheological mechanics and its advance in engineering applications[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(6)：1 081-1 106. (in Chinese))
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2014, Vol. 33 
