Analysis of geosynthetic reinforcement in pile-supported embankments. Part I: 3D plate model
- 1 April 2010
- journal article
- research article
- Published by Thomas Telford Ltd. in Geosynthetics International
- Vol. 17 (2), 59-67
- https://doi.org/10.1680/gein.2010.17.2.59
Abstract
Geosynthetic reinforcement over a grid of piles in soft soil can help transfer loads to the piles, and reduce settlements. This first part of a three-part study utilises a three-dimensional thin-plate model of the geosynthetic. The von Kármán theory, which includes the effects of bending and stretching, is used. The geosynthetic layer is represented using a linear stress–strain relationship. Owing to symmetry, a one-eighth triangular section of a square unit cell is considered, and the pile caps have either a square, diamond or circular shape. The soil between the pile caps and the geosynthetic, and the soft soil between the piles, are modelled as linear foundations with specified stiffnesses. The embankment stresses over the piles and over the soft soil are also specified. The numerical procedure involves finite differences and minimisation of the total energy. For two sets of parameter values, the effects of the shape of the pile caps on the displacements, strains and net stress reduction ratio are investigated. Sharp spikes in strain and stress occur at the edges of the pile caps. The second paper in this study adopts a three-dimensional cable-net model of the geosynthetic, and an axisymmetric model is analysed in the final paper.Keywords
This publication has 23 references indexed in Scilit:
- Analysis of geosynthetic reinforcement in pile-supported embankments. Part III: Axisymmetric modelGeosynthetics International, 2010
- Analysis of geosynthetic reinforcement in pile-supported embankments. Part II: 3D cable-net modelGeosynthetics International, 2010
- 3D coupled mechanical and hydraulic modeling of a geosynthetic-reinforced deep mixed column-supported embankmentGeotextiles and Geomembranes, 2009
- The performance of an embankment on soft ground reinforced with geosynthetics and pile wallsGeosynthetics International, 2009
- A simplified method for analysis of a piled embankment reinforced with geosyntheticsGeotextiles and Geomembranes, 2008
- Embankment supported on piles with biaxial geogridsProceedings of the Institution of Civil Engineers - Geotechnical Engineering, 2007
- An experimental investigation of soil arching within basal reinforced and unreinforced piled embankmentsGeotextiles and Geomembranes, 2007
- Behaviour of geogrid-reinforced load transfer platforms for embankment on rammed aggregate piersGeosynthetics International, 2007
- Axisymmetric numerical modeling of a unit cell in geosynthetic-reinforced, column-supported embankmentsGeosynthetics International, 2007
- Soft Ground Improvement by Vertical Rigid Piles Two-Dimensional Physical Modelling and Comparison with Current Design MethodsSoils and Foundations, 2005