模型実験に基づいた河川堤防のパイピング発達に係わる土質条件の分析

抄録

In order to understand the soil condition affecting the piping development of a river levee on a permeable foundation ground, model experiments was conducted under the conditions changing the soil layer of levee body and foundation ground. As a result, it was found that piping develops more easily as the foundation ground has a multilayer which has lower permeable soil above the higher permeable soil. However, if the soil particle size of the upper layer of the foundation ground is large, piping is unlikely to occur. Furthermore, it was found that piping is easy to develop if the permeability of levee body is low.