CONTENTS FEATURES I DFI Executive Editor Helen Robinson, P.E. [email protected] Managing Editor Emeritus Manuel A. Fine, P.E., [email protected] Advertising Manager Karol Paltsios, [email protected] Graphic Design Faye Klein DFI Executive Committee President John R. Wolosick, P.E., D.GE Vice President Dan Brown, Ph.D., P.E., D.GE Secretary Matthew Janes, P.Eng. Past President Robert B. Bittner, P.E. Other Trustees David Borger, P.E. Gianfranco Di Cicco Conrad Felice, Ph.D., P.E. Frank Haehnig Bernard H. Hertlein, FACI Gerry Houlahan, P.E. James O. Johnson K.S. Rama Krishna, Ph.D. Marine Lasne Anne Lemnitzer, Ph.D. J. Erik Loehr, Ph.D., P.E. Matthew E. Meyer, P.E. Thomas D. Richards, P.E., D.GE Alan Roach Martin G. Taube , P.E., P.G. Stefano Valagussa Michael H. Wysockey, Ph.D., P.E. Treasurer 77 120 Years of Caisson Foundations in Chicago Robert E. Schock and Eric J. Risberg SPECIAL ISSUE : P R O J E C T S Less than 20,000 years ago, the last of the glaciers retreated from the Chicago region. They left behind sheets of glacial clay till underlain by dense, over-consolidated till (“hardpan”) below which is the limestone bedrock, found about 100 ft (30.4 m) below street level. The most notable feature in this profile is the unusually soft clay till that has historically been called “Chicago Blue Clay.” By the 1890s, several tall office buildings had been built in Chicago. However, engineers were frustrated with the settlements they were experiencing in the new buildings. This frustration led to the development of the “Chicago Caisson” and eventually to modern high-capacity rock caissons. DEEP FOUNDATIONS • NOV/DEC 2016 • 3 71 Member Profile — John Niedzielski, P.E., Gannett Fleming: Passionate about His Projects COVER STORY 14 Army Corps Megaprojects: The Benefits of Innovative Foundations Dale Berner, Ph.D., P.E., and Michael O’Sullivan, P.E., S.E. ® DEEP FOUNDATIONS The Magazine of the Deep Foundations Institute (DFI) is published bimonthly by DFI. 326 Lafayette Avenue Hawthorne, NJ 07506 USA T: (973) 423-4030 | F: (973) 423-4031 Email: [email protected] Executive Director Theresa Engler, [email protected] This article focuses on lessons learned from innovative designs including in-the-wet construction methodology and modified foundation conditions, for two United States Army Corps of Engineers (USACE) megaprojects — the more than $2 billion Olmsted Dam on the Ohio River where an in-the-wet method, using a catamaran to place large precast shell elements onto pile foundations, was selected over the in-the-dry method, and the construction of the floodwall for the Inner Harbor Navigation Canal (IHNC) Lake Borgne Surge Barrier near New Orleans. SPECIAL ISSUE : P R O J E C T S O T N A S D I N N S U T O I T F U E P T E E D
