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| NUMERICAL ANALYSIS FOR VISCOELASTO-PLASTIC RHEOLOGICAL PROPERTY OF INTERLAYERED ROCK MASS |
| XIONG Liangxiao1，2，YANG Linde2 |
(1. Faculty of Architectural，Civil Engineering and Environment，Ningbo University，Ningbo，Zhejiang 315211，China；
2. Department of Geotechnical Engineering，Tongji University，Shanghai 200092，China) |
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Abstract The uniaxial creep tests on greenschist from auxiliary tunnel at Jinping II hydropower station are carried out. Taking the interlayered rock mass composed of greenschist and marble as subject，the numerical analysis for uniaxial compression creep test on interlayered rock mass is conducted by using FLAC3D. The experimental and analytical results show that the failure strength of interlayered rock mass decreases with increasing dip angle of marble interlayer when the dip angle is smaller than 60°，while the result will be quite on the contrary when the dip angle is larger than 60°. Reuss model or Voigt model is applicable for forecasting the failure strength of interlayered rock mass when the failure strength ratio between marble and greenschist is small.
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Received: 05 March 2010
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2011, Vol. 30 
