河川堤防の降雨浸透現象に及ぼす間隙空気挙動の影響
2016 年 22 巻 p. 257-260
詳細
2016 年 22 巻 p. 257-260
It is extremely important to understand the rainfall infiltration phenomenon in the unsaturated soil on the evaluation of the stability of river dike. The objective of this study is to clarify the influence of pore- air behavior on the characteristic of pore-water movement during the rainfall. In this paper, the laboratory rainfall infiltration experiment were carried out using the unsaturated soil columns. As a result, it was found that the pore-air in the soil of the hydraulic conductivity of 3 × 10-5 m/s was trapped and compressed under the rainfall intensity of over 40 mm/hr. The pore-air pressure restricted the downward movement of rainfall infiltration water.
