›› 2012, Vol. 33 ›› Issue (9): 2697-2703.

• Geotechnical Engineering • Previous Articles     Next Articles

Study of shearing strength parameters of coarse grained materials in slope stability analysis

WEI Kuang-min1, 2, ZHU Sheng1, 2, SHI Dao-bo3   

  1. 1. State Key Laboratory of Hydrology, Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China; 2. Institute of Hydraulic Structures, Hohai University, Nanjing 210098, China; 3. Shenzhen Water Conservancy Planning and Designing Institute, Shenzhen, Guangdong 518008, China
  • Received:2011-05-06 Online:2012-09-11 Published:2012-09-12

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Abstract: This paper uses both linear and nonlinear strength parameters in several typical rockfill dams’ slope stability analysis, clarifies the intrinsic factors that lead to the differences; the position of critical sliding surface is considered to be shallow, thus, shearing strength of coarse grained materials at low confining pressure is vital in slope stability analysis. Based on statistics of rockfills in several typical rockfill dams at home and abroad, power function strength criterion proposed by De Mello is thought to be more reasonable to express coarse grained soils’ strength in its whole confining pressure range. By drafting dam slopes with different heights and gradients, working stress ranges are determined. This study suggested a method to specify the linear strength parameters based on working stress ranges, these linear strength parameters have a good consistent with nonlinear parameters in slope stability analysis.

Key words: slope stability, coarse grained soils, strength parameters, stress range

CLC Number: 

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