Conference Papers
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Item A Critical Analysis of Curve Fitting Procedures Used in Evaluating Co-Efficient of Consolidation of Soils(Springer Science and Business Media Deutschland GmbH, 2025) Athira, S.; Sridhar, G.Consolidation settlement is the time-dependent phenomenon. Coefficient of consolidation is essential to estimate the rate of settlement of structures founded on saturated fine-grained soil. One of the common methods used to determine the coefficient of consolidation is through curve-fitting procedure. These procedures involve fitting a theoretical model to experimental data obtained from laboratory tests, such as the oedometer test. The Casagrande log t method and Taylor’s root t method are the standard methods to find the vertical coefficient of consolidation (cv). To design vertical drains, Barron’s theory is commonly used which requires coefficient of radial consolidation (cr). Over the past decade, several curve-fitting procedures namely the inflection method, rectangular hyperbola method, one-point method, early-stage log t method and many more, have been developed to determine either vertical or radial coefficients of consolidation. This paper provides a comprehensive review of procedures used for computing the vertical and radial coefficient of consolidation, offering a comparative analysis with advantages, limitations, and practical use of each method. Also, cv and cr of kaolin clay are determined through various methods. This assessment will be helpful to both academics and working engineers in accurately choosing the appropriate method for estimating the rate of settlement in saturated fine-grained soils. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.Item Comparative Study of Settlement Performance of Stone Column and Vertical Drains: A Review(Springer Science and Business Media Deutschland GmbH, 2025) Kapile, P.; Sridhar, G.The process of building stone columns through weak soils, specifically soft and ultra-soft clays, is known as “vibro replacement.†An integrated foundation support system with reduced compressibility and enhanced load bearing capacity is formed by the stone column and the intervening soil. Stone columns in cohesive soils easily discharge excess pore water pressure, causing settlement to occur more rapidly than in clay without stone columns. Literature has shown that stone column has the tendency to bulge due to less in-situ lateral stress of soil which results in reduced effectiveness and increased settlement of stone column. Surcharging, a prevalent preloading method for strengthening weak ground, involves applying additional load through soil embankments. In the context of ground improvement, surcharge preloading is commonly used. Prefabricated vertical drains play a crucial role in expediting the consolidation process of soft clay deposits when employing preloading as a ground improvement technique. This paper presents a critical review of the settlement performance of stone column and preloading with prefabricated vertical drains as it is of utmost importance in ground improvement works. A case study comparing the settlement performance of stone column and preloading with prefabricated vertical drains revealed that latter technique is more suitable for extremely soft soil. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.