Design of borehole deployments for slope stability analysis based on a probabilistic approach

被引:7
|
作者
Cai, Jing-Sen [1 ]
Yeh, Tian-Chyi Jim [2 ,3 ]
Yan, E-Chuan [1 ]
Tang, Rui-Xuan [4 ]
Hao, Yong-Hong [2 ]
机构
[1] China Univ Geosci, Fac Engn, Wuhan 430074, Peoples R China
[2] Tianjin Normal Univ, Key Lab Water Environm & Resources, Tianjin, Peoples R China
[3] Univ Arizona, Dept Hydrol & Atmospher Sci, 1133 E James E Rogers Way,122 Harshbarger Bldg 11, Tucson, AZ 85721 USA
[4] Yangtze Univ, Sch Geosci, Wuhan 430100, Peoples R China
基金
中国国家自然科学基金;
关键词
Conditional analysis; Cross-correlation maps; Borehole deployment approach; Slope stability analysis; Undrained shear strength; Spatial variability; RAINFALL-INDUCED LANDSLIDES; SPATIAL VARIABILITY; RELIABILITY-ANALYSIS; SOIL PROPERTIES; UNCERTAINTY; STRENGTH;
D O I
10.1016/j.compgeo.2020.103909
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
This study proposes a cross-correlation map-based borehole deployment approach for two-dimensional probabilistic slope stability analysis. This approach designs the layout of the proper number of boreholes based on the cross-correlation between the factor of safety and spatially variable soil strength every part of a slope. Numerically synthesized, undrained slopes are investigated as examples to illustrate the effectiveness of the proposed approach. Results demonstrate that the proposed approach is viable, and the cross-correlation maps are the appropriate metric for design slope borehole deployment. Using the cross-correlation maps, a small number of boreholes can sufficiently capture the large-scale heterogeneities that are critical to the slope stability. This information can help to identify the slip surface and improve the slope stability analysis. The small-scale heterogeneity, due to its short correlation structure or the residual covariance of the soil property field after conditioning using the borehole data, leads to a small amount of uncertainty in slope stability analysis. This small uncertainty could be vital to the slope stability analysis when the slope stability is close to the limit equilibrium state.
引用
收藏
页数:12
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