Abstract
The purpose of this study is to investigate the conditions that can be applied the results of the element experiment to the experiment of the practical size. In addition, is to investigate the relation between the water level in the chamber and the density of Toyoura sand irradiated ultrasonic wave. Moreover, Portable Corn Penetration Test was carried out to investigate the relation between the relative density and the strength of Toyoura sand in the chamber. As the result of the experiment, following has been understood. The density of Toyoura sand can be made high density as well as the element experiment. Water level in the chamber does not affect the increase in density of Toyoura sand. There is a good correlation between the relative density and the cone penetration resistance.
