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A platform for research: civil engineering, architecture and urbanism
Filtration Capability of Geotextile Encasement to Minimize the Clogging of Stone Column During Consolidation
Stone columns are constructed in soft soil to speed up the consolidation process. However, clogging of the column during the consolidation period can adversely degrade the drainage performance of the improved ground. The use of a suitable geotextile encasement may decrease clogging by preventing the movement of fine soil particles during the dissipation of water through the column. In this study, an analytical model is developed to investigate the filtration capability of a geotextile encasement used to prevent clogging. Permeability and retention criteria are suggested for the geotextile encasement to minimize stone column clogging. The spacing between the columns notably influences the selection of geotextile properties for reducing stone column clogging during consolidation. The difference in stiffness between the stone column material and soft soil, the capture coefficient of the column, and the smear effect also influence the selection of geotextiles. Under most critical conditions, the selection of a maximum size of geotextile opening that is less than or equal to rs,10 or D10 (where rs,10 or D10 indicates the soil particle size at which 10% of particles are finer than it) is effective to mitigate the column clogging during soil consolidation.
Filtration Capability of Geotextile Encasement to Minimize the Clogging of Stone Column During Consolidation
Stone columns are constructed in soft soil to speed up the consolidation process. However, clogging of the column during the consolidation period can adversely degrade the drainage performance of the improved ground. The use of a suitable geotextile encasement may decrease clogging by preventing the movement of fine soil particles during the dissipation of water through the column. In this study, an analytical model is developed to investigate the filtration capability of a geotextile encasement used to prevent clogging. Permeability and retention criteria are suggested for the geotextile encasement to minimize stone column clogging. The spacing between the columns notably influences the selection of geotextile properties for reducing stone column clogging during consolidation. The difference in stiffness between the stone column material and soft soil, the capture coefficient of the column, and the smear effect also influence the selection of geotextiles. Under most critical conditions, the selection of a maximum size of geotextile opening that is less than or equal to rs,10 or D10 (where rs,10 or D10 indicates the soil particle size at which 10% of particles are finer than it) is effective to mitigate the column clogging during soil consolidation.
Filtration Capability of Geotextile Encasement to Minimize the Clogging of Stone Column During Consolidation
Int. J. Geomech.
Pal, Suravi (author) / Deb, Kousik (author)
2023-06-01
Article (Journal)
Electronic Resource
English
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