Abstract
Since a river dike located at the downstream where urbanization has been in progress is composed of sandy soil consisting mainly of soft and fine particles, the river dike is considered to be easily damaged by pore air that has been enclosed within the dike. Therefore, the establishment of counter-measure method which prevents degradation of the dike by air blow is pressing need. So, this research examines the effect of the breathable–water proof sheet as counter-measure method which controls enclosure of pore air in a dike. According to the previous research to the breathable–water proof sheet, the seepage prevention effect and the mitigating effect of pore air pressure were confirmed from the model tests. We conducted in-site test on a real dike. As a result of artificial rain fall experiment in the dike, the usefulness of the breathable–water proof sheet became clear from the response of a soil water meter and specific resistance monitoring.
