Parametric Study of Large Settlement Due to Prefabricated Vertical Drain with Surcharge Preloading

Prefabricated vertical drain (PVD) combined with preloading is one way to deal soft soil conditions. The predicted settlement becomes the first information in designing surcharge, PVD configuration and depth, time required complete consolidation. Prediction of consolidation that using one-dimensional theory considerably underestimated field along construction surcharge placement stage. This paper intends evaluate completed project. Inclinometer monitoring data was evaluated confirm whether existed on preferred clay layers. parametric study root cause gap between prediction data. analysis continued a back calculations. involved various Cc, Cs, pc' play significant role settlement. results show conservative value those parameters simulated separately could not raise ultimate into inner upper lower bond results. However, combining would lead more accurate predictions agree result also confirms overconfidence picking underestimating Furthermore, selecting should avoid big ones put safe. It decisive work be done for further anticipation during post-construction.