SETTLEMENT OF A GROUP OF STONE COLUMNS IN SOFT SOIL
Résumé
A number of theoretical methods have been developed over the years to calculate the amount settlement of the soil reinforced with group of stone columns. The results deduced from these methods sometimes show large disagreement with the experimental observations. The reason of this divergence might be due to the fact that many of the previous methods assumed the deform shape of the columns which is different with the actual case. A new method to calculate settlement of the ground reinforced with group of stone columns is presented in this paper which overcomes the restrictions made by previous theories. This method is based on results deduced from numerical modeling. Results obtained from the model are validated.
Key Words: Stone columns, group, settlement, soft soil, prediction, geo-materials
Références
[2] Hughes, J.M.O. and Withers, N.J. 1974. Reinforcing of Soft Cohesive Soils with Stone Columns. Ground Engineering. 7(3): 42-49.
[3] Priebe, H. (1976), Abschatzunz des Setzungsverhattens Elnes Durch Stopverdichtung Verbesserten Baugrundes, Die Bautechnik 53, pp. 160-162.
[4] Balaam, N.P. and Booker, J.R. 1981. Analysis of rigid raft supported by granular piles. Int. Jour. Num. Anal. Meth. Geomech., 5: 379-403.
[5] Goughnour, R.R. and Bayuk, A.A. (1979), Analysis of Stone Column-Soil Matrix Interaction Under Vertical Load, Intern. Conf. on Soil Reinforcement, Paris, pp. 271-277.
[6] Barksdale, R.D., and Bachus, R. C. 1983. Design and Construction of Stone Columns. Report No. FHWA/RD-83/026. Federal Highway Administration, U. S. A.
[7] Poorooshasb, H.B., Meyerhof G.G. Analysis of behavior of stone columns and lime columns. Comput.Geotech., 1997, 20(1): 47-70.
[8] Poorooshasb, H.B., Miura, N. and Noorzad, A. 1997. An Upper Bound Analysis of the Behavior of stone columns.”, Special lecture delivered by the first author at the inauguration ceremony of the new facilities of the Institute for Lowland Technology, Saga University, Saga, Japan.
[9] Lee, J. S., Pande, G. N. 1998. Analysis of Stone-Column Reinforced Foundations. International Journal for Numerical and Analytical Methods in Geomechanics. 22(12): 1001-1020.
[10] Hu, W. 1995. Physical Modeling of Group Behavior of Stone Column Foundations. Ph.D. Dissertation, University of Glasgow.
[11] Wehr W. (1999), Schottersaulen – das verhalten von einzelnen saulen und saulengruppen, Geotechnik, Vol. 22, No 1, 40-47.
[12] Wood, M.D., Hu, W., and Nash, D.F.T. 2000. Group effects in stone column foundations: model tests. Geotechnique. 50(6): 689-698.
[14] Etezad, M., Hanna, A.M. and Ayadat, T. 2005. Numerical model for group of stone columns. Proceedings, 73rd Annual Meeting of ICOLD, Tehran, Iran.
[13] SeokBae W. and Shin B.W. (2002), Behaviors of Foundation System Improved With Stone Columns, Proc. International Offshore and Polar Engineering Conference Kitakyushu, Japan, May 26-31.PP: 675-678.
[15] Etezad, M., Hanna, A.M. and Ayadat, T. 2007. Modes of failure of group of stone columns under a raft foundation. Proceedings, 10th Australia New Zealand conference on Geomechanics, Brisbane, Australia.
[16] Chin, F.K. (1972) "The inverse Slope as a Prediction of Ultimate Bearing Capacity of Piles" Proc. 3rd Southeast Asian Conf. on Soil Engng, Hong Kong, pp. 83-91.