###

←前一篇   |   后一篇→

(1.河海大学 岩土力学与堤坝工程教育部重点实验室, 江苏 南京 210098;2.河海大学 岩土工程科学研究所, 江苏 南京 210098;3.河海大学 隧道与地下工程研究所, 江苏 南京 210098)
Non-slice Calculation of Safety Factor and the Determination of Critical Sliding Surface of Homogeneous Ground Embankment
(1.Key Lab. of Ministry of Education for Geomechanics and Embankment Eng., Hohai Univ., Nanjing 210098, China;2.Geotechnical Research Inst., Hohai Univ., Nanjing 210098, China;3.Inst. of Tunnel and Underground Eng., Hohai Univ., Nanjing 210098, China)

Abstract:Around the stability problem of homogeneous ground embankment, a new method for non-slice calculation of safety factor and the determination of the critical sliding surface of embankment slope is proposed. The range of three dimensional independent variables which determine the position of circular sliding surface is given. By taking the landslide body as the research object and using it as the integral domain, the non-slice integral limit equilibrium analysis is carried out, and the function expression of the safety factor is deduced. Based on the extreme condition of binary function, the critical sliding surface position can be directly determined without searching by combining finding the minimum value by lowering the dimension with the iterative calculation. The calculation program is compiled and the proposed method and the slice method are compared by two examples of homogeneous soil slope and embankment slope, and the results show that the safety factor of the same sliding surface is 0.68% smaller than that of M-P method; the deviation of the critical sliding surface position obtained by this method and slice method which strictly satisfying the limit equilibrium condition + traditional search method is small; the minimum safety factor of the embankment slope corresponding to the critical sliding surface is 0.87% higher than that of the M-P method + traditional search method; when the limit equilibrium condition is strictly met, the safety factor is not sensitive to the distribution of normal stress at the bottom of slip surface.

ZHAO Sihan,LIU Xin,SHAN Hao,HONG Baoning.Non-slice Calculation of Safety Factor and the Determination of Critical Sliding Surface of Homogeneous Ground Embankment[J].Advanced Engineering Sciences,2018,50(5):122-129.