Faculty Publications

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Publications by NITK Faculty

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Author: search.filters.author.Babu Narayan, K.S.B.Subject: search.filters.subject.Soil

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    The Need for Unsaturated Soil Mechanics: A Brief Review
    (Springer Science and Business Media Deutschland GmbH, 2021) Ujwala Shenoy, K.; Babu Narayan, K.S.B.; Sunil, B.M.
    Soils exhibit seasonal saturation and desiccation, often resulting in varying degrees of moisture content. In practice, soil is seldom fully saturated. When it is completely dry or wet, it behaves as a two-phase system. Otherwise, the moisture content within the interstices of soil vary, leading to partially saturated conditions. Unsaturated soil condition has significant influence on soil behaviour. This paper presents a brief review of the emergence of unsaturated soil mechanics and its applications. © 2021, Springer Nature Singapore Pte Ltd.
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    Utilization of Discrete Element Method in Multi-phase Soil Modeling for Soil Slope Stability Analysis
    (Institute for Ionics, 2023) Ujwala Shenoy, K.U.; Babu Narayan, K.S.B.; Sunil, B.M.
    Failure of slopes is often hydrodynamic in nature. Most of the failures are due to water infiltration and movement in the matrix of an otherwise dry soil mass. Consideration of multi-phase aspect of soil behavior is appropriate for logical judgments that culminate in appropriate solutions for slope stability problems. The mesh-free Discrete Element Method has been employed for understanding soil behavior. Different particle sizes and packing have been considered for analysis. Force networks, strain deviators, kinetic energy evolution have been extracted and interpreted and their utility in slope failure prediction has been highlighted. Results show that suction has considerable influence on the behavior of soil at the micro-scale. The soil suction manifests in the form of additional cohesion resulting in arresting the deformations due to applied load as evidenced by the obtained strain deviator plots, thereby aiding in the stability of the soil mass. The changes and fluctuations in kinetic energy can be an indicator of system instability. The research helps to adopt a particle-level approach toward real-time monitoring of stability of unsaturated slopes. © 2022, King Fahd University of Petroleum & Minerals.