新しいしらす斜面の安定解析手法

抄録

The inter-particle force due to meniscus at a contact point of soil particles is derived and then the relationship between suction and apparent cohesion is numerically obtained based on some probabilistic consideration on the soil particle size. A new slope stability analysis is proposed to analyze the stability of Shirasu slopes, in which Janbu method is applied to the slope failure caused by heavy rainfall. In the proposed stability analysis the change in apparent cohesion with the change in water content due to rainfall can be taken into account. The current safety factor can be calculated by a personal computer when the data on total amount and intensity of rainfalls are obtained in the real time.