Method Applied to Pseudo-Static Analysis on Slope Stability Features of Soft Top and Hard Bottom Stratum under Seismic Dynamic Load
LI Jing
WANG Ming-tao
LIU Cheng-yu
WU Bo
Abstract：In combination with an idea of the strength reduction method,in consideration of the slope features of the soft top and hard bottom stratum,based on the pseudo-static method,an analysis was conducted on the slope stability of the soft top and hard bottom stratum under the role of the seismic. An orthogonal test and extremum difference analysis method were applied to compare the slope height H ,slope angle β,thicknes sh of top stratum and parameters of the soft and hard stratum affected to the slope stability of the soft top and hard bottom stratum under the different intensity seismic.When the H ,β and h were certain,when an value selection was conducted on the internal friction angle?s and co-hesion c s of the top stratum as well as the horizontal seismic role coefficient kH ,the paper studied the three parameter variations affected to the slope stability of the soft top and hard bottom stratum and analyzed the slope stability evolution law and failure process of the soft top and hard bottom stratum. When the H ,βand h as well as the parameters of the soft and hard stratum were certain,the paper an-alyzed the value selection on the kH and proportional coefficientξ affected to the slope stability of the soft top and hard bottom stratum.The study results showed that theβ and h would be major factors affected to the slope stability of the soft top and hard bottom stratum under the seismic role and the H would be the second factor.The sensitivity of the h would be further increased with the seismic inten-sity enhanced.Under the different H ,β and seismic intensity,the slope safety coefficient F s and c s as well as ?s would approximately be in a linear proportional relationship.The horizontal seismic role would have max influences to the safety coefficient and the vertical seismic role would be the second.
Keywords：slope of soft top and hard bottom stratumseismicpseudo-static methodorthogonal testsafety coefficient
Publication Date：2016-05-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 52-58 )