STUDY ON THE PREDICTION OF PERMEABILITY REDUCTION DUE TO CLOGGING OF GEOTEXTILE MATERIALS IN EARTHFILL EMBANKMENTS

Abstract

Geotextiles are often used to from drainage layers within earthfill embankments and at earthfill/foundation interfaces. When designing the drainage layer, it is necessary to predict the probable reduction in permeability that will result from clogging of the drainage material. However, since the reduction of permeability varies according to the type of drainage material, the reduction of permeability should be predicted for the various types of drainage materials to be used for construction. Prediction of the expected reduction in permeability of the drainage layer can be easily accomplished by studying a prediction test method that reflects actual site conditions.