Jim Bushyeager, Florida Branch Manager for APE, assisted by APE’s California team headed by Steve Cress, have successfully tested questionable drilled shaft foundations in Florida. They used Steve Cress’s Monster pile hammer designed for driving super larger caissons in California for the San Francisco Bay Bridge.
A drilled shaft pier failed causing the bridge to collaspe in April of 2004. It took engineers until December of 2004 to come up with a solution- test them with a big pile hammer. For more details call APE Florida.