Design and performance of deep foundations : piles and piers in soil and soft rock : proceedings of sessions sponsored by the Committee on Deep Foundations and Rock Mechanics of the Geotechnical Engineering Division of the American Society of Civil Engineers in conjunction with the ASCE Convention in Dallas, Texas, Oct. 24-28 1993 - Nelson, Priscilla P.; Smith, Trevor D.; Clukey, Edward C. (Geotechnical special publication, 1993)