J. Cent. South Univ . (2014) 21: 1158−1164

A new double reduction method for slope stability analysis
     BAI Bing(白冰), YUAN W ei(袁维) , LI Xiao­chun(李小春)

Abstract:  The  core  of  strength  reduction  method  (SRM)  involves  finding   a  critical  strength  curve  that  happens  to  make  the  slope globally   fail  and  a  definition  of  factor  of  safety   (FOS).  A   new  double  reduction  method,  including  a  detailed  calculation  procedure and  a  definition of  FOS  for slope  stability   was  developed  based  on the  understanding of SR M. When  constructing  the new   definition of  FOS,  ef forts  were  made  to  make  sure that it  has  concise  phy sical  meanings  and  fully   reflects  the  shear  strength  of  the  slope.  T wo examples,  slopes  A   and  B  with  the  slope  angles  of  63°  and  34°  respectively ,  were  given  to  verify   the  method  presented.  I t  is  found that,  for  these  two  slopes,  the  FOSs  from  original  strength  reduction  method  are  respectively   1.5%  and  38%  higher  than those  from double  reduction  method.  I t  is  also  found  that  the  double  reduction  method  predicts  a  deeper  potential  slide  line  and  a  larger  slide mass.  These results  show that  on one  hand, the  double reduction method is  comparative to  the traditional methods  and is  reasonable, and  on  the  other  hand,  the  original  strength  reduction  method  may   overestimate  the  safety   of  a  slope.  The  method  presented  is advised  to  be  considered  as  an  additional  option  in  the  practical  slope  stability   evaluations  although  more  useful  experience  is required.

http://link.springer.com/article/10.1007/s11771-014-2049-6?sa_campaign=email/event/articleAuthor/onlineFirst