Experimental and numerical approaches for assessing the stability analyses of shallow residual soil slopes
Satyanaga A. Aventian G.D. Rahardjo H. Huang W. Hutama D.A.
2025Taylor and Francis Ltd.
International Journal of Geotechnical Engineering
2025#19Issue 6382 - 399 pp.
Tropical countries are prone to slope instability due to the presence of residual soil, especially under rainfall loading. Past studies only depended solely on laboratory testing or numerical analyses or field instrumentation or two combinations between either of them to assess the stability of residual soil slope. The objective of this study is to develop the integrated framework combining instrumentation reading, laboratory testing, and numerical modelling based on unsaturated soil mechanics principles to assess the residual soil slope stability related to shallow slope failure. The investigation reveals that instrumentation readings align closely with numerical seepage analysis, with the wetting front occurring at a depth of 0.55m after 72 hours. Stability analysis, evaluated using PLAXIS 2D (finite element) and GeoStudio (limit equilibrium), indicates a variance of 6.25% before and 2.97% after rainfall between two methods. Numerical analyses with unsaturated soil mechanics are required to ensure stability and deformation meet the requirement.
Natural disasters , rainfall , residual soil , slope stability , unsaturated soil mechanics
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Department of Civil and Environmental Engineering, Nazarbayev University, Astana, Kazakhstan
Research Center of Environmental Technology and Innovation, Study Program of Environmental Engineering, Department of Biology, Faculty of Science and Technology, Universitas Airlangga, Surabaya, Indonesia
School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, Singapore
School of Computing, Engineering, and Digital Technologies, Teesside University, Teesside, United Kingdom
Study Program of Environmental Engineering, Department of Biology, Faculty of Science and Technology, Universitas Airlangga, Surabaya, Indonesia
Department of Civil and Environmental Engineering
Research Center of Environmental Technology and Innovation
School of Civil and Environmental Engineering
School of Computing
Study Program of Environmental Engineering
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