堤防の浸透安定性に及ぼす縦断土質構造の影響

抄録

From 1996, the investigation of river levees has been carried out in order to find relatively weak points against the seepage flow on flood. The stability assessment method of river levee is based on the evaluation of the seepage flow of the cross-section of river levee. However, from three-dimensional perspective, this method could be insufficient for assessing because of the seepage flow.

In this paper, it is shown that the result of the stability of river levee using three-dimensional numerical analysis to reveal the influence of longitudinal soil profile. The result shows that the hydraulic gradient seems to increase by the pervious zone in the ground. In some case of the longitudinal soil profile and the flooding pattern, it is necessary to consider the monitoring and three-dimensional numerical analysis for proper assessment of levee’s stability.