Nondestructive Evaluation of Drilled Shafts

The Deep Foundations Committee of the Geo-Institute commissioned a task force, chaired by Alan Macnab, to evaluate the state of the practice of Nondestructive Evaluation of Drilled Shafts. The task force consisted of: • 2 researchers on the topic—Al Dimillio of the Federal Highway Administration and Dr. Michael O'Neill of the University of Houston • 1 academic—Dr. Richard Finno of Northwestern University • 4 representatives of testing firms—Frank Rausche of Goble Rausche Likins & Assoc., Inc.; Dr. Allen Davis of CTL Construction Technology Laboratories, Inc.; Bernard Hertlein of STS Consultants, Ltd.; and Larry Olson of Olson Engineering, Inc. • 2 owners' representatives—Robert Stott of Caltrans and Barry Berkovitz of the Federal Highway Administration • 3 contractors—Bill Starke of Deep Foundation, Ltd.; Tim Smith of Malcolm Drilling Co., Inc.; and Alan Macnab of Condon Johnson & Assoc., Inc. This report was previously published in the May 1988 issue of Foundation Drilling. It is being republished here to bring this consensus state-of-the-practice information to the attention of the entire geotechnical engineering profession and to invite feedback through the regular discussion section of the Journal.