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《Sichuan Building Science》 2013-01
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Nonuniformity of safety factors in slope stability analysis

CAO Yonghua1,2,3,HUANG Chuanzhi1,2,3(1.CCCC-Tianjin Port Engineering Institute Co.,Ltd.,Tianjin 300222,China; 2.Key Laboratory of Geotechnical Engineering,Ministry of Communication,Tianjin 300222,China; 3.Key Laboratory of Geotechnical Engineering of Tianjin,Tianjin 300222,China)  
Uniform safety factors are normally used in slope stability analysis,which is not reasonable in many cases.To study the influence of nonuniformity on slope stability analysis,the calculation formulas are obtained based on Fellenius,Bishop and multiple-sliding surface method.The calculation results shows that the safety factors of soil mass with relatively low strength will be overestimated and the safety factors of soil mass with relatively high strength will be underestimated if soil mass of slope vary widely in the strength.This will lead the calculation to be on the unsafe side.
【Fund】: 交通运输部应用基础研究项目;; 中交股份科技开发基金资助项目(2007-ZJKJ-13)
【CateGory Index】: TU43
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