Abstract
The long-term settlement behavior of reclaimed land was analyzed based on the observed data in the commerce and industry center and the eastern sewage treatment center located in reclaimed land in Hiroshima Bay. The coefficients of secondary compression of clayey grounds in the 2 sites were back-calculated from the measured settlements which have been observed for about 40 years and 20 years, respectively. It was found that, in the reclaimed grounds improved by sand drain method or in the reclaimed lands with no improvement, the back-calculated values of coefficient of secondary compression were close to those measured by the conventional consolidation tests before the construction. In the grounds improved by sand compaction pile (SCP) method, the back-calculated values of coefficient of secondary compression were close to those obtained in the laboratory test multiplied by the coefficient of settlement reduction which is used for the design of SCP method.
