Determination Method for Shear Strength Parameters of Rock-Soil Mixtures Using Close-Range Photogrammetry and 3-D Limit Equilibrium Theory  

作　　者：ZHOU Jia-wen YANG Xing-guo YANG Zhao-hui 

机构地区：[1]State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University [2]College of Water Resource and Hydropower, Sichuan University [3]School of Engineering, University of Alaska Anchorage

出　　处：《Journal of Mountain Science》2015年第5期1068-1083,共16页山地科学学报（英文）

基　　金：the support of the National Natural Science Foundation of China (Grant Nos. 41472272, 41102194);the Key Deployment Project of the Chinese Academy of Sciences (KZZD-EW-05-01);the Science Foundation for Excellent Youth Scholars of Sichuan University (2013SCU04A07)

摘　　要：Using a combination of close-range photogrammetry and three-dimensional(3-D) limit equilibrium theory, a determination method for the shear strength parameters of rock-soil mixture is presented. A close-range photogrammetry method is used for measurement of the 3-D terrain of the experimental target. Auto CAD Lisp and EXCEL VBA are used to perform 3-D limit equilibrium analysis of the stability of sliding mass and perform backanalysis of shear strength parameters. The presented method was used to determine the shear strength parameters of rock-soil mixtures at the Liyuan Hydropower Station. The 3-D terrain of sliding surface could be measured notably well using of closerange photogrammetry. The computed results reveal that the cohesion and friction angle of rock-soil mixtures were 3.15 k Pa and 29.88o for test A, respectively, and 4.43 k Pa and 28.30o for test B, respectively, within the range of shear strength parameters, as determined by field and laboratory tests. The computation of shear strength parameters is influenced by the mesh grid number, especially the cohesion of the rock-soil mixture. The application of close-range photogrammetry can reduce the siteworks and improve the computational efficiency and accuracy.

关 键 词：Rock-soil mixtures In-situ horizontalpush-shear test PHOTOGRAMMETRY Limit equilibrium Shear strength parameters 

分 类 号：P642.2[天文地球—工程地质学]