The Behavior of Dam Foundation Reinforced by Stone Columns: Case Study of Kissir Dam-Jijel
Description
This work presents a 2D numerical simulation of an earth dam to assess the behavior of its foundation after a treatment by stone columns. This treatment aims to improve the bearing capacity, to increase the mechanical properties of the soil, to accelerate the consolidation, to reduce the settlements and to eliminate the liquefaction phenomenon in case of seismic excitation. For the evaluation of the pore pressures, the position of the phreatic line and the flow network was defined, and a seepage analysis was performed with the software MIDAS Soil Works. The consolidation calculation is performed through a simulation of the actual construction stages of the dam. These analyzes were performed using the Mohr-Coulomb soil model and the results are compared with the actual measurements of settlement gauges implanted in the dam. An analysis of the bearing capacity was conducted to show the role of stone columns in improving the bearing capacity of the foundation.
Files
10008631.pdf
Files
(1.1 MB)
| Name | Size | Download all |
|---|---|---|
|
md5:a009c7be4c5fdee3c0505f9d16e30839
|
1.1 MB | Preview Download |
Additional details
References
- T.M. Weber, S.M. Spring man, M. Gäb, V. Racansky, H.F. Schweiger, Numerical modelling of stone columns in soft clay under an embankment, Geotechnics of Soft Soils – Focus on Ground Improvement – Karstunen & Leoni (eds) © 2009 Taylor & Francis Group, London, ISBN 978-0-415-47591-4.
- Nguyen, N.T., Foray, P. & Etienne Flavigny, E., Prise en compte de l'effet de la mise en place dans la modélisation numérique en 3D des colonnes ballastées dans l'argile molle. 18ème Congrès Français de Mécanique Grenoble, 27-31 août 2007.
- Agence Nationale Des Barrages et Transfert, Étude d'exécution et surveillance des travaux de réalisation du barrage de Kissir dans la wilaya de Jijel, Rapport de révision du projet. 2006.
- Agence Nationale Des Barrages et Transfert. Barrage de Kissir wilaya de Jijel, Monographie. 2010.
- Dhouib, A. & Blondeau, F., Colonnes ballastées. Presses de l'ENPC, 2005.
- Document Technique Unifié 13.2, Travaux de fondations profondes pour le bâtiment - Partie 1: Cahier des clauses techniques, Edition S1 44 - juin 2006.
- Rangeard, D., Phan, V.T.P., Lambert,S. & Martinez J., Densification de sols fins compressibles par colonnes ballastées: influence du mode de mise en place. INVACO2: Séminaire International, innovation & valorisation en genie civil & materiaux de construction n° : 5O-352 2011.
- Bouassida, M., Ellouze, S., Ben Salem, Z. & Znaidi, M.N., Parametric study of improved soft clay due to installation of a group of stone column. International Conference on Numerical Computation in Geotechnical Engineering NUCGE'08, 2008.