%0 Journal Article
%A WAN Li-ming
%A LIN Xiao-yan
%A YU Hong-ming
%A ZENG Hong-biao
%A ZHAO Chao
%T Strength Parameters Inversion of High Loess Slope at Limit State Using FLAC
%D 2017
%R 10.11988/ckyyb.20160380
%J Journal of Yangtze River Scientific Research Institute
%P 65-69
%V 34
%N 7
%X Determining  sliding surface and reliable shear strength parameters are crucial issues in  evaluating slope stability. A new method based on   numerical simulation technology is proposed to obtain  reliable strength parameters without presuming  the sliding surface. The relationship between heights and widths of thirty loess slopes at  limit state in Lanzhou region  were found to be linear,and the fitting degree was high. According to the obtained regression equation,FLAC was applied to establish the slope model, and strength reduction method was used to inverse  the strength parameters of slope at  limit state. Furthermore, the parameter inversion curves of four adjacent high slopes were drawn in the unified coordinate system, and  the comprehensive strength parameters of the segment were acquired. The inversion results show that with the increase of  slope height,the cohesive force of loess increases gradually but  internal friction angle decreases. According to  the calculation results,the comprehensive inversion curves of strength parameters of slope with heights from 60 m to 120 m are drawn. The method could directly evaluate the stability of high loess slope,improve the working efficiency,and  also provides reliable data to support the geometry design of high loess slope.
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20160380