Charts for estimating strength parameters from slips in homogeneous slopes |
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| Institution: | 1. Department of Geological Engineering, Chang''an University, Xi''an 710054, China;2. Department of Civil Engineering, University of Ottawa, Ottawa K1N6N5, Canada;1. School of Civil Engineering, Qingdao Technological University, Qingdao, PR China;2. Department of Civil and Architectural Engineering, Shenzhen Research Institute, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong;3. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, 8 Donghu South Road, Wuhan, PR China |
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| Abstract: | When the slope geometry, unit weight and pore water pressure distribution in a homogeneous soil slope are given, the location of the critical slip surface for a particular method of slices is related only to the ratio of c′ (cohesion) and tan ?′ (internal friction angle). To utilize this relationship in back calculating c′ and ?′ values, two slope models with circular slip mechanism are presented to represent shear failures in simple fill or cut slopes and long natural slopes, and for each of the models, two dimensionless parameters regarding c′/tan ?′ and maximum depth of the critical slip surface are introduced. Based on the new findings from limit equilibrium analysis of slope models, charts are plotted to show the relationships of the two dimensionless parameters and ?′ values for a safety factor of unity. Using the charts can make a rapid estimate of the magnitude of both c′ and ?′ from a known position of the failure surface in a homogeneous slope. |
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