A laboratory study on densification of loose sands by disc shearing

摘要

This paper presents the results of a laboratory study on using disc shearing method to increase the density of loose sands. Three sands were tested to investigate the relationships among degree of soil improvement, confining pressure, and disc rotation conditions. It is found that degree of soil improvement increases with confining pressure. The effectiveness of density improvement is the highest from the first round of rotation and rapidly decreases with the number of rotation. Reverse rotation is more efficient than one-way rotation. The depth of improvement is found to be one half of the diameter of the disc.