河川堤防樋門周辺地盤内のゆるみ領域や空洞の生成・発達に関する模型実験

抄録

Most of the existing sluiceways are supported by piles, and cavities are occurred under the sluiceway because of the settlement of foundation ground (lower cavity below). On the other hand, cavities and loosened zone around sluiceway are frequently happens in the field. Cavities under the sluice way are thought as the inception of this phenomenon, and in the present paper, two-dimensional cyclic seepage experiment are carried out to make clear the mechanism of this phenomenon. The experimental results suggest that, due to the downward seepage force during repeated water level fluctuation, the soils around the sluice way are sink down in to the lower cavities, that occurred by the settlement of the foundation.