Abstract:
Based on the principle seepage of unsaturated soil, the effects of covering areas and ways on distribution and change laws of soil water content of slope were carried out by FEM. For the silty slope, the rangeability of soil water content was the lowest when the rear edge of slope top was covered totally by geo-membrane. The covering areas at the front edge of slope toe had little effect on soil water content and its rangeability is large. The rangeability of soil water content at slope shoulder was decreased if the edges of geo-membrane were wrapped. The wrapped depth of geo-membrane had little effect on the soil water content. The rangeability of soil water content with stepped side-wrap was less than the rangeability with the way of linear side-wrap. For the clay slope, the different covering areas had little effect on the soil water content at slope shoulder. The different covering areas at slope toe had a certain effect on the soil water content. The soil water content decreased first and the incerased as time goes on. The less the geo-membrane covered, the more the soil water content increased. The covering areas at rear edge of slope top are very important to control the rangeabiliby of soil water content. The effect of covering way with stepped side-wrapped is better than the way with linear side-wrapped. The effect of covering with side-wrap is better than the effect of covering without side-wrap.