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Abstract In the construction of engineering structures, deep foundations, such as piles or wells, are commonly employed in continuous clayey soils at considerable depths. However, their utilization is often hindered by the associated high costs and time requirements. Shallow foundations are generally unsuitable due to substantial consolidation settlements. Ground improvement techniques, crucial in contemporary civil engineering projects, offer viable alternatives. Pre-Fabricated Vertical Drains (PVDs) expedite dewatering, accelerating the consolidation process in clayey soils. Additionally, stone columns enhance soil strength and expedite consolidation. This study explores the feasibility of shallow foundations like Isolated/Raft/box foundations employing ground improvement techniques such as PVDs and stone columns in clayey soils. Various properties of clayey soil, coupled with the impact on soil and Safe Bearing Capacity (SBC) at diverse depths utilizing PVDs and stone columns with distinct lengths and diameters, constitute the analytical focus. Numerical methods, specifically employing PLAXIS Software, facilitate a comprehensive examination. Results indicate that, for the prescribed settlement criteria, the Safe Bearing Capacity experienced a notable increase. This underscores the effectiveness of employing PVDs and stone columns as ground improvement techniques for enhancing the stability and performance of shallow foundations in clayey soils.
Thirmanpalli et al. (Sat,) studied this question.