ABSTRACT
A large fill of crushed rocks, measuring 100 m in height, was constructed for a substation of a new electric power supply net at Nose in Osaka. As a proposed quality control management method for filling works, deformations of the fill estimated using the FE-method in advance are compared to those observed during construction. First, “an extrapolation method” was applied for estimating ρdmax and degree of density, Dc, in the field. Then, triaxial compression tests were performed on samples having the same Dc with smaller “over-cut grain”. In order to evaluate deformation behavior of the fill during construction a double hardening model based on the non-associated flow rule was used as a numerical model to describe soil behavior. All parameters for the numerical model were obtained from laboratory tests. Two cases with different field densities were analyzed before construction, and the deformations were compared to those observed in the field. Deformation in Case 1, with a Dc of 97% for the fill, correlates well with results observed in the field, and it was concluded that fill compaction was well controlled.
