CONTENTS FEATURES I DFI 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 Rappaport [email protected] Executive Editor Virginia Fairweather [email protected] Managing Editor Emeritus Manuel A. Fine [email protected] Advertising Manager Karol Paltsios [email protected] DFI Executive Committee President, Robert B. Bittner Vice President, Patrick Bermingham Secretary, Matthew Janes Treasurer, John R. Wolosick Past President, James A. Morrison Other Trustees David Borger Dan Brown Gianfranco Di Cicco Khaldoun Fahoum Rudolph P. Frizzi Frank Haehnig Bernard H. Hertlein James Johnson Douglas Keller K.S. Rama Krishna Samuel J. Kosa Marine Lasne Raymond J. Poletto Michael Wysockey 53 Pile Driving Between the Amazon and Xingu Rivers: Solution Found Jorge Beim, Marcelo Groszownik and José Carlos do Amaral Part of a $1.2 billion high-voltage project in Brazil called for pile driving in extreme soil conditions, such as year-round water, dense jungle vegetation and low surface soil resistance in rare dry periods. The area was also part of an environmental reserve, called “Forever Green.” A clever construction solution overcame problems by distributing the driving equipment to 15 small driving rigs, each of which bore less of the load. The engineers, from JWB Consulting and two Brazilian geotechnical firms, conducted many loads tests to confirm the effectiveness of the approach. 60 Ground Freeze Method for Groundwater Cut-off Daniel W. Mageau, P.E., Aaron K. McCain, P.E., and Larry W. Applegate A new approach to ground freezing was successfully tested in Miami, Fla.’s challenging ground conditions. Typically, these include near surface groundwater, weak limestone and sand. In the test, the new Zone Freeze Pipes method created a thick, temporary, frozen barrier under the planned excavation depth and cut off vertical groundwater flow before excavation. The method was compared to using conventional full freeze pipes. Miami ordinances have changed to allow underground parking and the new method can facilitate construction. DEEP FOUNDATIONS • JAN/FEB 2014 • 3 12 Sao Paulo’s Brooklin Station: An OPA Contender Dario Libano The extension of Sao Paulo, Brazil’s metro is currently the most important investment in public transport by Sao Paulo state’s government. The final design at the line’s Brooklin Station was revised by the parties to the contract, including Brasfond, the foundation contractor. The new design featured a concrete structural diaphragm wall and reduced construction time and also avoided dewatering effects in a geological region that included Quaternary sediments and contaminated plumes. The project marks the first time that a hydromill was used for such work in Brazil. O T N A S D I N N U S T O I F T U E P T E E D
