Wpływ kolmatacji na współczynnik filtracji układu grunt-geowłóknina

The paper presents the results of laboratory tests carried out in the modified soiI-geotextile penneameter (Fig. 1) recommended in ASTM standard D 5101-90. Laboratory tests were performed on nonwoven geotextile K-500 (Tab. 1) and slightly clayey sand (Tab. 2). In figures 2 and 3 the change in permeability coefficient in soil-geotextile system for individual zones under different hydraulic gradients are shown. The changes in permeability coefficient in soil-geotextile system are caused by phenomena mechanical (Fig. 4), biological (Fig. 5 and 6 ) and chemical clogging.