›› 2009, Vol. 30 ›› Issue (1): 99-104.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Shear rheological experiment on rock mass discontinuities and back analysis of model parameters

ZHU Zhen-de1, 2, LI Zhi-jing1, 2, ZHU Ming-li1, 2, WANG Qing 1, 2   

  1. 1. Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China; 2. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China
  • Received:2007-07-10 Online:2009-01-10 Published:2011-01-14

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Abstract:

The subsurface rock masses for Jinping Second Stage Hydropower Station caves features with abundant joints. A shear rheological experiment was carried out on the weak rock interlayer masses i.e. slate and marble, with respect to their shearing behaviors. A weak-surface direct shear rheological apparatus was employed to fulfill the experiment. Time domain related shear stress-shear displacement curves of the rock masses were obtained. Long-term shear strength parameters of weak rock interlayer samples were found that decreased compared to those given from rapid shear tests. Rock cohesion is more effective than its internal friction coefficient in affecting shear rheological behaviors. A standard linear viscoelasto-plastic rheological model is proposed by simulating testing results on six general shear rheological models. The proposed model is suitable to describe the shear rheological behaviors of the weak rock interlayer masses. Model parameters are gained through back analysis.

Key words: Jinping Second Stage Hydropower Station, shear rheological, long-term strength, cohesion

CLC Number: 

  • O 357.3
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