Numerical Modeling of Geotextile-Reinforced Embankments over Deep Cement Mixed Columns Incorporating Strain-Softening Behavior of Columns
- 1 April 2015
- journal article
- Published by American Society of Civil Engineers (ASCE) in International Journal of Geomechanics
- Vol. 15 (2)
Abstract
Geotextile-reinforced embankments over deep cement mixed (DCM) columns are widely used for the construction of highway embankments over soft clay with low shear strength and high compressibility. Numerical modeling based on the FEM is widely used to investigate the behavior of these embankments during construction and serviceability, incorporating consolidation of the foundation soil over time. However, not much attention has been paid to the strain-softening behavior of DCM columns beyond yield, which is essential in ultimate limit-state computations to determine the stability of embankments during the failure of columns. This paper presents a constitutive model, which is an extension of the Mohr-Coulomb model, for the simulations of strain-softening behavior of cement admixed clays. The model is validated using triaxial test data found in the literature for cement admixed Singapore and Hong Kong marine clays and Ariake clay. A two-dimensional (2D) coupled mechanical and hydraulic numerical imple...Keywords
This publication has 22 references indexed in Scilit:
- Modified Structured Cam Clay: A generalised critical state model for destructured, naturally structured and artificially structured claysComputers and Geotechnics, 2010
- Two-dimensional parametric study of geosynthetic-reinforced column-supported embankments by coupled hydraulic and mechanical modelingComputers and Geotechnics, 2010
- Behaviour of cemented clay simulated via the theoretical framework of the Structured Cam Clay modelComputers and Geotechnics, 2010
- 3D coupled mechanical and hydraulic modeling of a geosynthetic-reinforced deep mixed column-supported embankmentGeotextiles and Geomembranes, 2009
- Constitutive Model for Cement Treated Clay in a Critical State Frame WorkSoils and Foundations, 2004
- Numerical Analysis of Geosynthetic-Reinforced and Pile-Supported Earth Platforms over Soft SoilJournal of Geotechnical and Geoenvironmental Engineering, 2002
- State of the art in deep mixing technology. Part III:geomaterial characterizationProceedings of the Institution of Civil Engineers - Ground Improvement, 2000
- Soil Fracturing of the Surrounding Clay during Deep Mixing Column InstallationSoils and Foundations, 1999
- Delayed collapse of cut slopes in stiff clayGéotechnique, 1997
- Finite element analysis of progressive failure of Carsington embankmentGéotechnique, 1990