Zmiana współczynnika filtracji układu piasek średni-geowłóknina K 500

The paper presents the results of laboratory tests carried out in the modified soil-geotextile permeametr (Fig. 1) recommended in ASTM standard D 5101-90. Laboratory tests were performed on nonwoven geotextile K-500 (Tab. 1) and medium sand (Tab. 2). In ftgures 2 and 3 the change in permeability coefficient in soil-geotextile system and soil under different hydraulic gradients are shown. The relationship for the evaluation of the change in coefficient in soil-geotextile system based on the initial values of the permeability coefficient of geotextile and soil as well as hydraulic gradient is proposed.