Numerical modelling of geosynthetic reinforced pile-supported embankments

Abstract

This thesis presents a comprehensive numerical study carried out using the finite element method in order to investigate the behaviour of GRPS embankments and improve the existing knowledge in the area. Coupled hydraulic and mechanical modelling is carried out using both three-dimensional and two-dimensional plane strain conditions using the finite element modelling software ABAQUS/Standard. Numerical model verification was carried out for both two-dimensional and three-dimensional cases using a real case history of a GRPS embankment constructed in Shanghai, China. The role of geosynthetic reinforcement in a GRPS embankment was investigated in detail using a two-dimensional numerical model which uses the equivalent area method for the two-dimensional idealisation of piles. Furthermore, this thesis presents a detailed investigation on the load transfer mechanism of a GRPS embankment using both two-dimensional and three-dimensional numerical model results. A detailed parametric study is presented in both two-dimensional and three-dimensional conditions incorporating the full geometry of a GRPS embankment system. The influence of creep effects of the geosynthetic reinforcement on the behaviour of a GRPS embankment is also investigated in this thesis. The creep model used for the analysis was verified using wide width tensile test results from literature and also verified using a geosynthetic pullout test results. Finally, the conclusions of the research are presented with recommendations for further research on the design of GRPS embankments.

Date of Award	2014
Original language	English