CONTENTS FEATURES Departments PRESIDENT’S MESSAGE Respecting and Learning from History. . 7 EXECUTIVE DIRECTOR UPDATE Preserving DFI’s History. . . . . . . . . . . . . 9 DFI ACTIVITIES Winter Planning Meeting update, Committee Project Fund awards, the latest on SuperPile ’16, Gerwick Award winner announced, IBC news, an update on the st 41 Annual Conference, upcoming seminars, DFI Journal update and more. Photos of DFI Activities by Herb Engler. . . 23 REGIONAL REPORT DFI of India. . . . . . . . . . . . . . . . . . . . . 71 EDUCATIONAL TRUST REPORT . . . . 77 TECHNICAL ACTIVITIES UPDATE Update on the Helical Seismic Research Project and an update from the ACIP Pile Committee . . .. . . . . . . . . . . . . . . . . . 117 BENEATH THE SURFACE Older Employees Bring Special Value . 121 LEGALLY SPEAKING Risks and Perils of Working Without a License . . . . . . . . . . . . . . . . . . . . . . . 123 DFI PEOPLE AND COMPANIES News about people, companies and products . . . . . . . . . . . . . . . . . . . . . . 125 CALENDAR & AD INDEX . . . . . . . . 128 SPECIAL ISSUE : 105 DFI and NDT — Parallel Histories and Mutual Benefits Bernard H. Hertlein, FACI When DFI was founded, quality assurance and quality control (QA/QC) of foundation construction was rudimentary. Nondestructive testing (NDT) was a nascent technology, known to very few people, and very limited in its capabilities and applications. In the four decades since DFI became a reality, NDT researchers and practitioners have taken advantage of technological advances to improve those existing testing and analysis techniques, and to create new ones that have all contributed to the engineering body of knowledge. This has enabled contractors to improve the quality and reliability of their products, and engineers to design more efficient foundations. FINDING COMMON GROUND® DFI is an international association of contractors, engineers, suppl iers, academics and owners in the deep foundations industry. We find common ground through networking, education, communication and collaboration. Our multi-disciplinary membership creates a consensus voice and a common vision for continual improvement in the planning, design and construction of deep founda- tions and excavations. Become a Member of DFI at www.dfi.org 111 Rebuilding a Historic Viaduct Brian M. Fraley A high-profile $89.9-million Southeastern Pennsylvania Transportation Authority (SEPTA) project requires the complete replacement of the historic 925 ft (282 m) long, 100 ft (30.5 m) high Crum Creek Viaduct in Swarthmore, Pa. The structure was built in 1895 and underwent repairs in 1983, but was in need of replacement. The original bridge on this site was a pre-Civil War era, five-span timber arch truss bridge on masonry piers owned by the Philadel- phia, Baltimore & Washington Railroad. SPECIAL ISSUE : SPECIAL ISSUE : 97 The History of Micropile Technology Allen Cadden, P.E., D.GE; Jim Bruce, P.Eng.; Mary Ellen Bruce Large, P.E., D.GE; and Peggy Hagerty Duffy, P.E., D.GE Micropiles are small-diameter foundation elements constructed using specialty drilling and grouting methods. Micropiles have evolved since their introduction into the North American market in the 1970s from being lightly-loaded (less than 30 kips) elements used primarily for remedial applications to today’s high-capacity, often hybridized foundation systems, for both remedial and new-build projects. DEEP FOUNDATIONS • MAY/JUNE 2016 • 5
