PREDICTION OF SLOPE FAILURE BASED ON AMOUNT OF RAINFALL

The total rainfall till the slope failure was investigated by numerical analysis considering the physical properties of soil. The regions which were made the object of this investigation are Kure in Hiroshima pref., Tochuyo in Ehime pref. and Kagoshima pref.. The soil of Kure and Tochuyo is made of decomposed granite soil and Kagoshima is made of shirasu. The representative physical properties of soils of failed slope was examined. The successive total rainfall causing to slope failure was obtained numerically considering the various characteristics of slope. The critical rainfall causing to slope failure increases in the order of Kure, Tochuyo, Kagoshima. The results of numerical analysis agree quantitatively with the data of slope failure.