抄録
This paper presents a study on slope-covering method, which is frequently used in Japan as a reinforcement measure against seepage failure of river embankments. Covering the face of the riverside slope with impervious materials (impervious soil, concrete, impervious sheet, or other artificial materials) prevents the river water from penetrating into the embankment. In this study, a series of model experiments and numerical seepage analyses were performed to clarify the prevention effect of this method. From the results, it is clear that covering the slope is effective not only in delaying the rising speed of local hydraulic gradient at the slope toe, but also in reducing the hydraulic gradient. The numerical analyses showed that this method is more effective when used on steeper slopes. However, the reinforcing effect is drastically reduced when the water level exceeds the area of the slope covered.
