Effect Of Geotextiles On Cbr Values Of Soft Soil.
Abstract
Geotextiles have been successfully used for reinforcement of soils to improve the CBR value of soil. In this paper the geotextile layers are used to develop pseudo-confining effect to increase CBR value of soft clay soils. Laboratory California bearing ratio (CBR) tests were performed to investigate the load-penetration behaviour of unreinforced and reinforced soft clay soils with geotextile layers. In this studies placing two layers of geotextile at top 1/5th height within soil sample. As soft clay soil used having only cohesion (Ø=0) the increase pseudo-confining effect is due to binding force by cohesion property of soil that increased the CBR value. To further increase the CBR value of soft clay by increasing pseudo- confining effect, 1/5th layer is provided with non plastic sand layer (Ø soil) with and without geotextile layers. The result of these tests shows that, CBR value of soft soils increases as pseudo-confining effect increases.
