共 31 条
Determination method for shear strength parameters of rock-soil mixtures using close-range photogrammetry and 3-D limit equilibrium theory
被引:7
作者:
Zhou Jia-wen
[1
,2
]
Yang Xing-guo
[2
]
Yang Zhao-hui
[3
]
机构:
[1] Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Peoples R China
[2] Sichuan Univ, Coll Water Resource & Hydropower, Chengdu 610065, Peoples R China
[3] Univ Alaska Anchorage, Sch Engn, Anchorage, AK 99508 USA
基金:
中国国家自然科学基金;
关键词:
Rock-soil mixtures;
In-situ horizontal push-shear test;
Photogrammetry;
Limit equilibrium;
Shear strength parameters;
TERRESTRIAL DIGITAL PHOTOGRAMMETRY;
FIELD-MEASUREMENTS;
EVOLUTION;
SLOPE;
DOCUMENTATION;
DEFORMATION;
LANDSLIDE;
D O I:
10.1007/s11629-015-3491-0
中图分类号:
X [环境科学、安全科学];
学科分类号:
08 ;
0830 ;
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. AutoCAD 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 kPa and 29.88A degrees for test A, respectively, and 4.43 kPa and 28.30A degrees 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 site works and improve the computational efficiency and accuracy.
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页码:1068 / 1083
页数:16
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