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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.
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Received: 19 April 2013
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2014, Vol. 33 
