A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Numerical modeling of the mechanical behavior of geosynthetic liner systems (GLS) installed on slopes
Geosynthetic systems constitute a preferential slip line when they are laid down on the slopes of civil engineering structures. To improve the design of GLS on slopes under low normal stresses, a numerical model based on the finite element method (FEM) is proposed in this paper. This 2-D model makes it possible to take into account the compatibility of the strains and displacements of the various components in the GLS and the effect of flow parallel with the slope in the cover soil. Two full-scale instrumented experiments are simulated to validate the model presented. Many applications of the ABAQUS finite element code have shown its performance in modeling systems comprising geosynthetic layers. The soil cover is represented by porous elements with 4 nodes (CPE4P) which make it possible to take hydraulic conditions into account and in particular the pore pressure. The sub-soil is simulated with the same type of element, but it is considered rigid and fixed in this case. Two-node bar elements are appreciated by many authors to represent the geosynthetic liners. Considering the strain of geosynthetic reinforcement, which is relatively weak in reality, an elastic model was applied to simulate the geosynthetic sheets. The cover soil is generally installed gradually from the bottom to the top of the slope on the construction site. In order to respect this process in our model, the layer of the cover soil is divided into a series of identical blocs, whose weights are activated one after the other in the different stages of analysis. A flow within the cover soil mass consists of flow lines parallel to the slope. The model described was then validated by two full-scale experiments. The course of these two experiments and the comparisons of experimental and numerical results are presented here.
Numerical modeling of the mechanical behavior of geosynthetic liner systems (GLS) installed on slopes
Geosynthetic systems constitute a preferential slip line when they are laid down on the slopes of civil engineering structures. To improve the design of GLS on slopes under low normal stresses, a numerical model based on the finite element method (FEM) is proposed in this paper. This 2-D model makes it possible to take into account the compatibility of the strains and displacements of the various components in the GLS and the effect of flow parallel with the slope in the cover soil. Two full-scale instrumented experiments are simulated to validate the model presented. Many applications of the ABAQUS finite element code have shown its performance in modeling systems comprising geosynthetic layers. The soil cover is represented by porous elements with 4 nodes (CPE4P) which make it possible to take hydraulic conditions into account and in particular the pore pressure. The sub-soil is simulated with the same type of element, but it is considered rigid and fixed in this case. Two-node bar elements are appreciated by many authors to represent the geosynthetic liners. Considering the strain of geosynthetic reinforcement, which is relatively weak in reality, an elastic model was applied to simulate the geosynthetic sheets. The cover soil is generally installed gradually from the bottom to the top of the slope on the construction site. In order to respect this process in our model, the layer of the cover soil is divided into a series of identical blocs, whose weights are activated one after the other in the different stages of analysis. A flow within the cover soil mass consists of flow lines parallel to the slope. The model described was then validated by two full-scale experiments. The course of these two experiments and the comparisons of experimental and numerical results are presented here.
Numerical modeling of the mechanical behavior of geosynthetic liner systems (GLS) installed on slopes
Numerische Deckschichtentwicklung des mechanischen Verhaltens von an Böschungen eingesetzten geosynthetischen Deckschichtsystemen (GLS)
Girard, He P. (author) / Poulain, D. (author) / Lac, P. (author)
2006
4 Seiten, 9 Bilder, 2 Tabellen, 11 Quellen
Conference paper
Storage medium
English
| British Library Conference Proceedings | 2006
Geosynthetic Composite Liner System for Steep Canyon Landfill Side Slopes
| British Library Conference Proceedings | 1994
| NTIS | 1998
Shear strength of geosynthetic composite systems for design of landfill liner and cover slopes
| Online Contents | 2011
| NTIS | 1998