NUMERICAL MODELING OF FLOATING PREFABRI-CATED VERTICAL DRAINS IN LAYERED SOIL

作者：Ikhyr Ikhyr^*; Schweiger Helmut F

来源：Acta Geotechnica Slovenica, 2012, 9(2): 24-35.

• two soil layers
• floating prefabricated vertical drain
• double and single drainage
• numerical model
• soft clay
• consolidation

This paper presents a comparison of field measurements and a numerical model of settlements based on the construction of an embankment on soft soil for the Cirebon Power Plant Project in Indonesia, where prefabricated vertical drains (PVDs) were installed. In the numerical model, floating PVDs in two soil layers for two- and oneway drainage conditions are examined in order to determine the optimum penetration depth. In this study, good agreement between the field measurements of the settlements and the numerical prediction could be achieved. An interesting result of this study is that the differences in the stiffness and/or the permeability in the unimproved area below the PVD tip have a significant influence on the optimum penetration depth (L/H) in the two-soil-layer condition. The numerical study showed that it is possible to use floating PVDs in single drainage conditions if the second layer is stiffer and/or more permeable than the first layer.

• 出版日期2012