CONTENTS FEATURES I DFI Executive Director Theresa Engler [email protected] Executive Editor Dr. Antonio Marinucci, M.B.A., P.E. [email protected] Managing Editor and Advertising Manager Karol Paltsios [email protected] Faye Klein President Graphic Design DFI Executive Committee Matthew Janes, P.Eng. Vice President Michael H. Wysockey, Ph.D., P.E. Secretary James O. Johnson Treasurer Gianfranco Di Cicco Past President Dan Brown, Ph.D., P.E., D.GE Other Trustees Peter Faust, Dipl.-Ing. Conrad W. Felice, Ph.D., P.E. Franz-Werner Gerressen, Dipl.-Ing. Mike Kelley K.S. Rama Krishna, Ph.D. Anne Lemnitzer, Ph.D., P.E. Dan MacLean, P.E. J. Erik Loehr, Ph.D., P.E. Matthew E. Meyer, P.E. Morgan NeSmith, P.E. David Paul, P.E. Howard Perko, Ph.D., P.E. Stefano Valagussa Martin G. Taube, P.E., P.G. Lori Simpson, P.E., G.E. Thomas D. Richards, P.E., D.GE 71 Development of a Novel Cushion Block for Hydraulic Piling Hammers Jakub I. Malinowski This article summarizes the joint industrial-academic research and development of the hydraulic piling hammers’ cushion block. The undertaken two-year project focused on the effect various materials and designs have on the pile driver’s efficiency, durability and noise emission. The entire R&D cycle, along with descriptions of tests and their results, are presented. DEEP FOUNDATIONS • JAN/FEB 2020 • 3 Technical and logistic challenges required innovative solutions to successfully create a safe, dry excavation within which three levels of the museum would be located. Excava- tion to depths of 59 ft (18 m) was required but the groundwater table was located at a depth of about 6.6 ft (2 m), resulting in a pressure differential of about 3,275 psi (157 kPa) acting on the bottom slab. Since the self-weight of the museum was insufficient, micropiles were used to anchor the bottom slab and the foundation slab against uplift/buoyancy. 57 Member Profile: Professor Armin Stuedlein — Prolific Teacher and Researcher COVER STORY 14 Museum of the Second World War in Poland — Challenging Anchoring Against Uplift ® Natalia Maca O T N A S D I N N S U T O I T F U E P T E E D
