The design of foundations based on soft clay is still a very challenging problem. Three experimental cases were performed to examine the action of soft clay: the first case without drains, the second case with sand drains and the third case with prefabricated vertical drains (PVDs). Two-dimensional finite element analysis was carried out using PLAXIS 2D and its findings were compared to previous experimental results where good consistency was found. Parametric study was conducted with a variation in the size, length and diameter of sand drains. The length and spacing of the PVD, the diameter of the smear zone and the permeability of the smear zone were also studied. Results have shown that PVD is preferable to the improvement of soft clay rather than sand drainage systems. The sand drains decreased the time of 90% consolidation by (90.8%) using 50 cm diameter, 2 m spacing and 25 m length, and the PVDs decreased the time of 90% consolidation by (94.4%) using 4 mm × 10 cm dimensions, 2 m spacing and 25 m length. Both sand drains and PVD are effective in decreasing the consolidation time. The results of this paper concluded analytical formula that indicate the percentage of wick drain consolidation.

基于软粘土的地基设计仍然是一个非常具有挑战性的问题。进行了三个实验案例以检查软土的作用：第一个案例没有排水沟，第二个案例有沙漏，第三个案例有预制垂直排水沟（PVD）。使用PLAXIS 2D进行了二维有限元分析，并将其发现与先前的实验结果进行了比较，在先前的实验结果中发现了良好的一致性。进行了参数研究，并改变了排沙孔的尺寸，长度和直径。还研究了PVD的长度和间距，涂片区的直径和涂片区的渗透性。结果表明，PVD优于软砂而不是排沙系统。沙漏将90％固结的时间减少了（90。8％（直径为50 cm，间距为2 m，长度为25 m的情况下），并且使用4 mm×10 cm尺寸，间距为2 m和长度为25 m时，PVD减少了90％固结的时间（94.4％）。排砂和PVD均可有效减少固结时间。本文的结果得出了表明灯芯排水固结百分比的分析公式。