The Use of Geosynthetic Capillary Barriers to Reduce Moisture Migration in Soils

Abstract

Capillary theory is reviewed and applied to the use of capillary barriers in soils. Specific emphasis is placed on the use of geosynthetics as capillary barriers. Theory and experimental evidence indicates that capillary barriers placed horizontally in soils above the water table significantly reduce the rate of water flow across them in response to hydraulic gradients. As a result, they are very effective in keeping soil from becoming saturated with water due to capillary action.