抄録
Prefabricated vertical drains (PVDs) have been used in finegrained soils remediation system to provide a higher flow rate.However, the migration and accumulation of the fine particles inthe soil result in the filter cake adjacent to the geotextile and thepore clogging in the geotextile. An analytical solution for soilflushing through a clogged geotextile with a filter cake isdeveloped. The results obtained by the proposed analyticalsolution agree well with those obtained from the finite differencemethod. Results from an illustrative example indicate that theformation of a filter cake at the surface of a geotextile is far moredisadvantageous to soil flushing than pore clogging within ageotextile. The 5-hour base concentration at the depth of z = 50mm for the case just considering the pore clogging in thegeotextile is just 1.06 times more than that assuming no filtercake and no pore clogging in the geotextile. When the poreclogging combined with a filter cake are considered, the 5-hourbase concentration at the depth of z = 50 mm increases by afactor of approximately 4.94.
