CONTENTS FEATURES I DFI Graphic Design Faye Klein DFI Executive Committee President Dan Brown, Ph.D., P.E., D.GE Vice President Matthew Janes, P.Eng. Secretary Gianfranco Di Cicco Treasurer Michael H. Wysockey, Ph.D., P.E. Past President John R. Wolosick, P.E., D.GE Other Trustees Conrad Felice, Ph.D., P.E. Frank Haehnig Gerry Houlahan, P.E. James O. Johnson Mike Kelley K.S. Rama Krishna, Ph.D. Anne Lemnitzer, Ph.D., P.E. J. Erik Loehr, Ph.D., P.E. Matthew E. Meyer, P.E. David Paul, P.E. Howard Perko, Ph.D., P.E. Thomas D. Richards, P.E., D.GE Alan Roach Lori Simpson, P.E., G.E. Martin G. Taube , P.E., P.G. Stefano Valagussa 63 Member Profile — Dr. K.S. Rama Krishna: Impeccable Integrity, Simplicity and High System of Values 69 Drilled Shaft Construction – Selecting the Appropriate Equipment and Tooling Walter I. Paniagua, Ph.D. The author proposes a practical graph based on borehole diameter and soil/rock characteristics to assist in selecting the appropriate capacity of drilling equipment and tooling. Several examples are included along with qualitative solutions for ensuring stability of the borehole wall and at the bottom of the hole to be used when constructing drilled shafts in different conditions. DEEP FOUNDATIONS • MAR/APR 2018 • 3 COVER STORY 14 High-Capacity Micropiles for Bulfinch Crossing Anthony C. Barila, P.E., John R. McKinnon and Swetha Chennu ® Executive Director Theresa Engler, [email protected] Executive Editor Dr. Antonio Marinucci, M.B.A., P.E. [email protected] Managing Editor Emeritus Manuel A. Fine, P.E., [email protected] Managing Editor and Advertising Manager Karol Paltsios, [email protected] Four high-capacity micropiles were tested early during the design phase to evaluate the in-situ rock and bond strengths for a 46-story residential structure. The authors present the results of the load testing program, which were used to optimize the design of the micro- piles, reducing the length of the rock sockets and, ultimately, saving the owner money. O T N A S D I N N S U T O I T F U E P T E E D
