Abstract
The Eco-tube is a geosynthetic container developed for reusing low quality surplus soil such as dredged soil and improving its quality. The calculation assumed to be a saturated condition is done in a present design method, and the design method has not established it enough though the soil packed into the tube is expected to decrease water content ratio by drain and by evaporation from the surface of the bag and to enter the state of unsaturated. This paper describes the change in the saturation level of the soil by dehydration in the experiment and examines the piling design method of Eco-tube.