基于动态和整体强度折减法的边坡稳定性_陈国庆要点解析.pdf

DOI:10.13722/ki.jrme.2014.02.002 33 2 Vol.33 No.2 2014 2 Chinese Journal of Rock Mechanics and Engineering Feb.2014 ( 610059) ( ) P 642 A 2014 STABILITY ANALYSIS OF SLOPE BASED ON DYNAMIC AND WHOLE STRENGTH REDUCTION METHODS CHEN GuoqingHUANG RunqiuSHI YuchuanXU Qiang (State Key Laboratory of Geohazard Prevention and Geoenvironment ProtectionChengdu University of Technology ChengduSichuan 610059China) Abstract Slope stability evaluation based on strength reduction can only obtain static single safety factor. The dynamic evaluation method of slope stability is proposed based on dynamic and whole strength reduction methods in order to obtain the slope stability in the progressive failure process. At firsta series of expanded sliding surfaces are searched by using the dynamic strength reduction method(DSRM) and then the strength parameters of the sliding surface are reduced in each reduction step. The corresponding safety factor of the slope is calculated by using whole strength reduction calculation. At lastthe relationship of sliding surface propagation and the related safety factor is analyzed. Thereforeslope stability evaluation and support suggestion can be given according to the change rule of dynamic safety factors of slope. Two case studies show that sliding surface obtained by DSRM is consistent with in-situ monitoring datareasonably reflecting the failure characteristics of slope or landslide. A series of dynamic safety factors are presented in the progressive f