Laboratory Evaluation of Piles Installed with Vibratory Drivers

摘要

A large scale laboratory study of the basic behavior of displacement piles installed with vibratory drivers is described in the report, and the influence of various soil and driver parameters on the behavior of the piles is considered. Among the driver parameters investigated are frequency, bias mass, and dynamic force (eccentric moment). Sand parameters that were considered include grain size, relative density, and in situ effective stress. In all, 22 large scale model tests were performed. The report also includes a proposed design method for predicting the bearing capacity of a vibro-driven pile from the rete of penetration, power delivered to the pile head, and soil conditions.