Numerical Solution of Stone Column–Improved Soft Soil Considering Arching, Clogging, and Smear Effects
- 1 March 2013
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of Geotechnical and Geoenvironmental Engineering
- Vol. 139 (3), 377-394
- https://doi.org/10.1061/(asce)gt.1943-5606.0000789
Abstract
Improvement of soft clay deposits by the installation of stone columns is one of the most popular techniques followed worldwide. The stone columns not only act as reinforcing material increasing the overall strength and stiffness of the compressible soft soil, but they also promote consolidation through effective drainage. The analytical and numerical solutions available for ascertaining the response of column-reinforced soil have been developed on the basis of the equal strain hypothesis. For typical surcharge (embankment) loading, the free strain analysis appears to give more realistic results comparable to field data. The paper presents a novel numerical model (finite-difference method) to analyze the response of stone column–reinforced soft soil under embankment loading, adopting the free strain approach and considering both arching and clogging effects. Apart from predicting the dissipation of excess pore water pressure and the resulting consolidation settlement with time, the load transfer m...Keywords
This publication has 25 references indexed in Scilit:
- A mathematical model to study the soil arching effect in stone column-supported embankment resting on soft foundation soilApplied Mathematical Modelling, 2010
- On settlement of stone column foundation by Priebe's methodProceedings of the Institution of Civil Engineers - Ground Improvement, 2010
- Geosynthetic-encased stone columns in soft clay: A numerical studyGeotextiles and Geomembranes, 2009
- Consolidation around stone columns. Influence of column deformationInternational Journal for Numerical and Analytical Methods in Geomechanics, 2008
- A simplified method for analysis of a piled embankment reinforced with geosyntheticsGeotextiles and Geomembranes, 2008
- Improved soft clay characteristics due to stone column installationComputers and Geotechnics, 2007
- Mitigation of liquefaction and associated ground deformations by stone columnsEngineering Geology, 2004
- New consolidation equation for soil–cement pile improved groundCanadian Geotechnical Journal, 2003
- Deformation analysis of soft ground reinforced by columnar inclusionsComputers and Geotechnics, 1996
- Consolidation by vertical drainsGéotechnique, 1981