Conference Papers

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    Study of Tilt on Adjacent Strip Footings
    (Springer Science and Business Media Deutschland GmbH, 2021) Anaswara, S.; Shivashankar, R.
    The primary function of the foundation of a structure is to safely transfer the loads from the superstructure to the soil beneath without occurrence of shear failure and excessive settlements. Due to rapid urbanisation, very often structures and their foundations are built close to each other. Foundation of the newly built and the already existing structures interferes with each other to some extent depending on their relative positions. Due to large stresses at points between the footings (due to overlapping of stresses), there is a non-uniform pressure distribution beneath the footings and beyond in the gap between the footings. There is an increase in stresses from the outer edge of the footing to the inner edge. This causes tilt in the footings. This numerical study looks into the tilt of two adjacent strip footings on the surface of cohesive and cohesionless soils. Numerical analysis using a finite element-based software is being used. The parameters varied in this study are the clear distance between the two adjacent rigid strip footings and width of the footings. One of the footings representing an already existing foundation is loaded with half of the estimated failure load of isolated footing and adjacent footing loaded up to failure. The effect of interference is observed to be particularly significant in terms of the tilt. © 2021, Springer Nature Singapore Pte Ltd.
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    Seismic Slope Stability Analysis Using Pseudo-static Approach
    (Springer Science and Business Media Deutschland GmbH, 2024) Mishra, P.; Venkataramana, K.
    Ensuring the stability of slopes under the action of an earthquake is always a challenging problem for geotechnical engineers. As earthquake is one of the major factors responsible for the failure of slopes, it becomes necessary to carry out comprehensive research on the stability analysis of slopes subjected to earthquake-induced loads. Many researchers have developed several methods to analyse the stability behaviour of slope, but till now the failure behaviour has not been understood properly because of the complexity of earthquake loading. With the above background, this study presents a numerical analysis, performed in PLAXIS 3D, to investigate the stability of slopes subjected to earthquake-induced loadings using pseudo-static approach. Also, parametric studies have been carried out to better understand the effects of different parameters (soil properties, slope dimensions, earthquake loadings, etc.) on the Factor of Safety (FOS) and displacement of the slope. The stability of a slope is best assessed in terms of its FOS, which is computed by the strength reduction technique. Analyses’ results show that the slope can sustain a maximum displacement of 442.80 mm, while slope height is varied till the failure point keeping all other parameters constant. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.
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    Behaviour of Open Trenches for the Mitigation of Ground-Borne Vibrations
    (Springer Science and Business Media Deutschland GmbH, 2025) Kumar, A.; Sajan, M.K.; Akarsh, P.K.; Sah, B.; Chaudhary, B.
    With the advancement of modern technology, increased rail and road transit systems have been built to relieve traffic congestion in densely populated cities. Railway lines may inevitably pass through residential or vibration-sensitive areas where high-precision labs or factories are located. Ground vibrations associated with these railway and roadway systems have become a significant concern due to rapid urbanization and related activities. Traffic, vibrating equipment, pile driving, machine foundation, and blasting induce ground vibrations might affect the integrity of nearby structures. Therefore, vibration isolation is necessary to mitigate ground-borne vibrations with suitable techniques in the present-day context. Researchers have performed multiple studies to develop efficient mitigation techniques to counter the problem of ground-borne vibrations, such as open trenches, infilled trenches, and pile barriers. Open trench barriers are one of the prominent isolation techniques for ground vibration. In this study, the performance of open trenches is investigated for the isolation of ground-borne vibrations by performing numerical analyses by utilizing the finite element method. A parametric study was carried out to evaluate the influence of trench geometry and the number of trenches in attenuating the ground-borne vibrations. The results indicate that the depth and width of an open trench are two crucial parameters determining its performance in wave attenuation. The ground-borne vibration isolation system of the trench shows improvement in damping ground-borne vibrations. Additionally, the dual trench systems were observed to reduce the wave propagation across all distances from the vibration source. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.