透水性基礎地盤に起因する河川堤防の被災過程と浸透流解析結果の分析

抄録

Model experiments were carried out to observe the progressive failure of river levee caused by permeable foundation ground. This paper aims to represent the process of the experiments by seepage analysis. The result indicates that local hydraulic gradient or the weight blance of covered soil layer against pore-water pressure shows good performance as an indicater for river levee failure. In additon to that, it suggests that the evaluation of pore-pressure after the failure or deformation by weakning of levee toe is important to represent the whole process of progressive failure until breach.