Clogging test on filter fabric of plastic drainage board used in clay

Abstract

Vacuum preloading technology combined with plastic drainage board has been applied more and more widely. Because the plastic drainage board is used soft-clay in most cases, it is not recommend to study the clogging of filter fabric by gradient ratio method. Therefore, we have proposed a new experimental method, i.e. axial compression clogging. This method can be used to study the clogging of geotextile in clay. Several groups of filters fabric were carried out by this method, and their performances were compared with those obtained from on-side used plastic drainage board. The results show that soil content per unit area and vertical permeability coefficient are very close to those obtained from on-side used plastic drainage board, and the values of the former are slightly smaller than those of the latter.