Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Stability of Two-Layered Earth Slope Under Varying Rainfall Intensity
Rainfall is one of the major causes of slope failures occurring in residual soils, which are of concern to geotechnical engineers. Naturally, soil is non-homogeneous in nature with different mechanical and hydraulic properties such as shear strength, soil–water characteristic curve, saturated permeability and unsaturated permeability functions. Negative pore-water pressure or matric suction plays an important role in the evaluation of stability of earth slopes. With rainfall infiltration, the pore-water pressure changes and hence affects its stability. A numerical model of a two-layered non-homogeneous slope is prepared with different hydraulic properties. An unsaturated seepage analysis with infiltration is performed in the finite element framework. With the pore pressures obtained from the seepage analysis, a finite slope stability analysis is performed in the limit equilibrium framework. The pore-water pressure profiles of the two-layered slope are studied with different rainfall intensities. The negative pore-water pressures are reduced to zero at a much shallow depth for higher rainfall intensity, thus reducing its safety factor rapidly. It is also observed that at high rainfall intensity, the two-layered slope suffers a shallow slope failure.
Stability of Two-Layered Earth Slope Under Varying Rainfall Intensity
Rainfall is one of the major causes of slope failures occurring in residual soils, which are of concern to geotechnical engineers. Naturally, soil is non-homogeneous in nature with different mechanical and hydraulic properties such as shear strength, soil–water characteristic curve, saturated permeability and unsaturated permeability functions. Negative pore-water pressure or matric suction plays an important role in the evaluation of stability of earth slopes. With rainfall infiltration, the pore-water pressure changes and hence affects its stability. A numerical model of a two-layered non-homogeneous slope is prepared with different hydraulic properties. An unsaturated seepage analysis with infiltration is performed in the finite element framework. With the pore pressures obtained from the seepage analysis, a finite slope stability analysis is performed in the limit equilibrium framework. The pore-water pressure profiles of the two-layered slope are studied with different rainfall intensities. The negative pore-water pressures are reduced to zero at a much shallow depth for higher rainfall intensity, thus reducing its safety factor rapidly. It is also observed that at high rainfall intensity, the two-layered slope suffers a shallow slope failure.
Stability of Two-Layered Earth Slope Under Varying Rainfall Intensity
Lecture Notes in Civil Engineering
Prashant, Amit (Herausgeber:in) / Sachan, Ajanta (Herausgeber:in) / Desai, Chandrakant S. (Herausgeber:in) / Chatterjee, Dooradarshi (Autor:in) / Murali Krishna, A. (Autor:in)
12.03.2020
11 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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