Rainfall-Induced Failure of Volcanic Slope with Crushable Particles Subjected to Freeze-Thaw Action

This paper aims at clarifying failure mechanisms of volcanic slope with crushable particles due to rainfall and freeze-thaw action. A series of rainfall tests was performed on model volcanic slopes having several water contents and slope angles. Considering the model test results, it was found that surface slope failure was changed depending strongly on slope angle and the initial water content. Furthermore, it was shown that the effect of freeze-thaw action on mechanical behavior for volcanic slope having high crushable particles was higher than that for volcanic slope having low crushable particles, and could not be ignored for evaluation of slope stability.