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Effect of spatial variability of shear strength on reliability of infinite slopes using analytical approach
Affiliation:1. Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Chang''an University, Ministry of Education, China;2. School of Environmental Science and Engineering, Chang''an University, China;3. Department of Hydrology and Water Resources, University of Arizona, Tucson, AZ 85721, USA;4. Department of Safety, Health and Environmental Engineering, National Yunlin University of Science and Technology, Touliu, Yunlin, Taiwan;5. Research Center for Soil and Water Resources and Natural Disaster Prevention, National Yunlin University of Science and Technology, Touliu, Yunlin, Taiwan;6. Key Laboratory for Water Environment and Resources, Tianjin Normal University, Tianjin, China;1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Department of Geotechnical Engineering, Tongji University, Siping Road 1239, Shanghai 200092, China;2. Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China;3. School of Earth Sciences and Engineering, Nanjing University, Nanjing, China
Abstract:
This paper develops an analytical approach for reliability analysis of infinite slope stability in presence of spatially variable shear strength parameters. The analytical approach considers spatial autocorrelation of each parameter and cross-correlations between different parameters. It is robust, computational efficient and provides insight to the importance of spatial correlation scale on slope reliability analysis. This paper also explores the difference in continuous and discrete random fields and emphasizes the importance of fine discretization in relation to correlation scale. Finally, it shows that conditioning the stability analysis with information about trends and spatial data leads to reliability assessments with less uncertainty.
Keywords:Infinite slope  Slope stability  Shear strength  Spatial variability  Analytical approach  Reliability
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