A system for driving a large diameter caisson into the ground, comprising a crane
assembly, a plurality of vibratory devices, a clamp assembly, a suspension assembly,
and a timing system. Each vibratory device generates a vibratory force. The clamp
assembly rigidly secures each of the vibratory devices to one of a plurality of
predetermined angularly spaced locations about the caisson. The suspension assembly
connects the vibratory devices to the crane assembly such that transmission of
vibratory forces from the vibratory devices to the crane assembly is inhibited.
The timing system operatively connects the plurality of vibratory devices to synchronize
the vibratory forces generated thereby.
