Effect of Cement Stabilized Slab on the Interaction Behavior between Floating Soil Cement Column and Surrounding Soil
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Abstract
Numerical analysis technique by the finite element method (FEM) using a symmetric unit cell model was conducted to investigate the interaction behaviors between the floating column and the surrounding soft soil and the stress concentration focusing on the effect of strength and stiffness and thickness of slab on the ground surface. The FEM results can be used as the database and guideline for improving the method of consolidation settlement-time curve by Pongsivasathit et al. (2012). As results, the increasing thickness of cement stabilized slab decreases significantly the relative penetration of floating soil-cement column with the surrounding soil. The undrained shear strength of slab slightly effects on the relative penetration. The stress concentration at any depth decreases with increasing of slab thickness and the change of undrained shear strength of the slab slightly effects on the stress concentration. So, it is necessary to improve the method of settlement-time curve calculation by Pongsivasathit et al. (2012) in order to be able to take the effect of slab thickness.
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