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A platform for research: civil engineering, architecture and urbanism
Comparative Behaviour of Stone Columns and Vertical Drains for Mitigation of Liquefaction
A sudden loss in strength of saturated loose cohesionless soil during an earthquake is called liquefaction. Before 1964, liquefaction was not considered a dangerous hazard, but due to the increase in population and urbanisation, risk of liquefaction has increased. Throughout the years, liquefaction-induced failure has been and continues to be the key cause of earthquake destruction. Therefore, more study is needed to ensure the safety of buildings and structures to reduce the risk of liquefaction-induced hazards. Compaction, grouting, chemical stabilisation stone columns are several ground-improvement measures used to prevent liquefaction. This paper examines the effectiveness of stone columns and vertical drains for liquefaction mitigation. A raft foundation founded on liquefaction susceptible soil was taken for the study. The time history of the Chamoli 1999 earthquake has been considered for dynamic analysis. FEM software Plaxis 3D has been used for both static and dynamic analyses. This paper uses stone columns and vertical drains as liquefaction mitigation techniques, and a comparison has been drawn. Results were studied in the form of settlement and bearing capacity and excess pore pressure. As remedial measures, installing stone columns reduced settlement up to 30% at several locations. Maximum value of excess pore pressure (EPP) was reduced by 40% when stone column was used whereas it was reduced by 70% when vertical drains were used at same location.
Comparative Behaviour of Stone Columns and Vertical Drains for Mitigation of Liquefaction
A sudden loss in strength of saturated loose cohesionless soil during an earthquake is called liquefaction. Before 1964, liquefaction was not considered a dangerous hazard, but due to the increase in population and urbanisation, risk of liquefaction has increased. Throughout the years, liquefaction-induced failure has been and continues to be the key cause of earthquake destruction. Therefore, more study is needed to ensure the safety of buildings and structures to reduce the risk of liquefaction-induced hazards. Compaction, grouting, chemical stabilisation stone columns are several ground-improvement measures used to prevent liquefaction. This paper examines the effectiveness of stone columns and vertical drains for liquefaction mitigation. A raft foundation founded on liquefaction susceptible soil was taken for the study. The time history of the Chamoli 1999 earthquake has been considered for dynamic analysis. FEM software Plaxis 3D has been used for both static and dynamic analyses. This paper uses stone columns and vertical drains as liquefaction mitigation techniques, and a comparison has been drawn. Results were studied in the form of settlement and bearing capacity and excess pore pressure. As remedial measures, installing stone columns reduced settlement up to 30% at several locations. Maximum value of excess pore pressure (EPP) was reduced by 40% when stone column was used whereas it was reduced by 70% when vertical drains were used at same location.
Comparative Behaviour of Stone Columns and Vertical Drains for Mitigation of Liquefaction
Springer Proceed. in Energy
Dwivedi, Gaurav (editor) / Verma, Puneet (editor) / Shende, Vikas (editor) / Kotiyal, Krishna (author) / Singh, Manendra (author)
International Conference on Innovations in Clean Energy Technologies ; 2023 ; Bhopal, India
2024-12-02
12 pages
Article/Chapter (Book)
Electronic Resource
English
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