Abstract: The treatment method prefabricated vertical drains(PVDs) has been used in the project for the stability of soft clay foundation during filling.A subsidence took place during filling constructed but the monitring value had not exceeded the precaution value,which caused attention to the monitoring systom.This paper analyzed the monitoring date about settlement,lateral displacement,layered settlement and excess pore water pressure,and discussed the related control standard.Based on the research res...