ABSTRACT It is very important to control any risk of instability of embankment during vacuum construction, the simulation vacuum preloading method using tri-axial apparatus is proposed to predict the behavior of soft soil improvement in the laboratory, as well as to make this method become familiar and easier in the future. The tri-axial apparatus is used instead of the large-scale one, which has been performed by Bergado (1998) and Indaratna (2008). The tri-axial test on small size specimen can be carried out in one week compared to the large-scale apparatus takes one month for big specimen. In addition, the lateral deformation as well as the shear strength increase with time can determine accurately.
Cite this paper
N. Duong, W. Teparaksa and H. Tanaka, "Simulation Vacuum Preloading Method by Tri-Axial Apparatus," International Journal of Geosciences, Vol. 3 No. 1, 2012, pp. 211-221. doi: 10.4236/ijg.2012.31024.
 W. Kjellman, “Consolidation of Clayey Soils by Atmospheric Pressure,” Proceedings of a Conference on Soil Stabilization, Massachusetts Institute of Technology, Boston, 1952, pp. 258-263.
 B. Indraratna and I. W. Redana, “Laboratory Determination of Smear Zone Due to Vertical Drain Installation,” Journal of Geotechnical and Geoenvironmental Engineering, Vol. 124, No. 2, 1998, pp. 180-184.
 S. Hansbo, “Consolidation of Fine-Grained Soils by Prefabricated Drains,” Proceedings of 10th International Conference on Soil Mechanics and Foundation Engineering, Stockholm, Vol. 3, 1981, pp. 677-682.
 R. A. Barron, “Consolidation of Fine-Grained Soils by Drain Wells,” Transactions of ASCE, Vol. 113, 1948, pp. 718-742.
 B. Indraratna, C. Rujikiatkamjorn and I. Sathananthan, “Radial Consolidation of Clay Using Compressibility Indices and Varying Horizontal Permeability,” Canadian Geotechnical Journal, Vol. 42, No. 5, 2005, pp. 1330- 1341. doi:10.1139/t05-052
 J. C. Chai, J. P. Carter and S. Hayashi, “Vacuum Consolidation and Its Combination with Embankment Loading,” Canadian Geotechnical Journal, Vol. 43, No. 10, 2006, pp. 985-996. doi:10.1139/t06-056
 T. A. Tran and T. Mitachi, “Equivalent Plane Strain Modeling of Vertical Drains in Soft Ground under Embankment Combined with Vacuum Preloading,” Computers and Geotechnics, Vol. 35, No. 5, 2008, pp. 655- 672. doi:10.1016/j.compgeo.2007.11.006