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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of Plasticity on Liquefaction of a Selected Fine-Grained Soil
This paper presents the influence of plasticity on liquefaction characteristics of a selected fine-grained soil. The effect of plasticity was evaluated in terms of pore water pressure generation and deformation characteristics of the fine-grained soils with cyclic loading. Stress-controlled cyclic triaxial tests were performed for this purpose. Test samples were prepared at comparable dry densities with varying plasticity index (PI). Sil-Co-Sil #40, a non-plastic commercial silt and EPK Kaolin clay were used as base materials. These materials were mixed in different proportions to obtain desired PI values. The PIs of the tested samples were varied over reasonably wide range [non-plastic (NP), 2.7, 3.5, 5.7, 9.8, and 14.5]. The samples were tested at an initial effective confining pressure of 34.5 kPa (5.0 psi) using a cyclic stress ratio (CSR) of 0.2, 0.3, and 0.4. The results indicate that with an increase in PI of the soil samples tested from NP to 14.5, liquefaction resistance of the soil in terms of deformation decreases initially and then increases with an increase of PI. Similar effect of plasticity on the liquefaction characteristics of soil was observed while evaluating in terms of pore pressure generation. The tests also revealed that, the rate of pore pressure generation first increases with an increase of PI from non-plastic to 3.5 and then decreases with increase of PI beyond 3.5.
Effect of Plasticity on Liquefaction of a Selected Fine-Grained Soil
This paper presents the influence of plasticity on liquefaction characteristics of a selected fine-grained soil. The effect of plasticity was evaluated in terms of pore water pressure generation and deformation characteristics of the fine-grained soils with cyclic loading. Stress-controlled cyclic triaxial tests were performed for this purpose. Test samples were prepared at comparable dry densities with varying plasticity index (PI). Sil-Co-Sil #40, a non-plastic commercial silt and EPK Kaolin clay were used as base materials. These materials were mixed in different proportions to obtain desired PI values. The PIs of the tested samples were varied over reasonably wide range [non-plastic (NP), 2.7, 3.5, 5.7, 9.8, and 14.5]. The samples were tested at an initial effective confining pressure of 34.5 kPa (5.0 psi) using a cyclic stress ratio (CSR) of 0.2, 0.3, and 0.4. The results indicate that with an increase in PI of the soil samples tested from NP to 14.5, liquefaction resistance of the soil in terms of deformation decreases initially and then increases with an increase of PI. Similar effect of plasticity on the liquefaction characteristics of soil was observed while evaluating in terms of pore pressure generation. The tests also revealed that, the rate of pore pressure generation first increases with an increase of PI from non-plastic to 3.5 and then decreases with increase of PI beyond 3.5.
Effect of Plasticity on Liquefaction of a Selected Fine-Grained Soil
Uprety, Sandip (Autor:in) / Puri, Vijay (Autor:in) / Tamang, Rakam Lama (Autor:in) / Kolay, Prabir (Autor:in)
Eighth International Conference on Case Histories in Geotechnical Engineering ; 2019 ; Philadelphia, Pennsylvania
Geo-Congress 2019 ; 374-383
21.03.2019
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Effect of Plasticity on Liquefaction of a Selected Fine-Grained Soil
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