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Abstract The strength parameters of sliding zone soil are indispensable factors for stability evaluation and countermeasure design for landslides. Based on the previous study results，the shear tests on sliding zone soil derived from Xuecheng landslide，located along Zagunao river，Sichuan province，are conducted as follows：first the sliding zone soil is consolidated；then large displacement ring sheared，then consolidated again，and last ring sheared again；and the strength characteristics of sliding zone soil of the reactivated landslide are simulated and clarified. The method for determining and selecting the residual strength and recovered strength parameters depending on different effective vertical stresses is proposed and proved to be useful and rational for the reactivated landslide. The method may provide some important references for rationally choosing strength parameters of sliding zone soil of the reactivated landslide.
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Received: 29 December 2010
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2011, Vol. 30 
