Get the New FHWA Drilled Shaft Manual
Get the NCHRP Synthesis 418 – Pile Criteria From Test Pile Data
Dan’s Speaking Schedule September 12-13, 2012: Concrete used in Drilled Shaft Construction - ADSC/DFI Drilled Shaft Seminar - Denver, Colorado
October 26, 2012: Factors Affecting the Selection and Use of Drilled Shafts for Transportation Infrastructure Projects - 26th Central Pennsylvania Geotechnical Conference - ASCE/DFI - Hershey, Pennsylvania Other DBA Team Speaking Appearances John Turner (September 12-13, 2012): Analysis & Design of Drilled Shafts - ADSC/DFI Drilled Shaft Seminar - Denver, Colorado
John Turner (September 12-13, 2012): Techniques for Drilled Shaft Construction - ADSC/DFI Drilled Shaft Seminar - Denver, Colorado Conferences, Meetings, Seminars, Workshops
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By David Graham, on April 1st, 2011
Well, I, David, have survived my first (and hopefully last) winter in Minnesota. I spent most of January and February observing the installation of the Pier 5 drilled shafts at the new Hastings bridge project in Hastings, Minnesota. In addition to the drilled shafts, there has been a lot activity at Hastings since Aaron last blogged about this project in January. A link to his post is here. All of the ground improvement piles for the column-supported embankment have been installed and approximately 75% of the caps have been poured. The 42-inch piles and pile caps for Piers 8, 9, and 10 are also complete. Piles for the north embankment retaining wall have been installed and construction of the wall has begun. Excavation for the rock bearing spread footings that will support the south land piers is in progress. Work at Piers 6 and 7 and on the north shore are currently on hold as the Mississippi River is experiencing its annual spring flood. The water level is about 14 feet above normal elevation.
I have taken the pictures Paul and I have collected over the last few months and uploaded some of the more interesting ones to a Picasa web album. The pictures are generally in chronological order and cover most of the construction process from November of 2010 right up to the end of March 2011. A link to our our video of a Statnamic load test at Hastings that Aaron blogged about is here.
By David Graham, on January 17th, 2011
Last spring, DBA designed a composite ground improvement system for a new hospital as part of the Owensboro, Kentucky, Medical Health System. Tim performed most of the ground improvement design for the design-build project with Berkel & Company Contractors, Inc. The design is a composite ground system with a layer of compacted gravel above lightly reinforced cast-in-placed displacement piles (known commercially as CGEs). Spread foundations placed on the compacted gravel distribute the structural load to the soil and CGEs. The construction of the composite ground system began and was completed in the summer of 2010. The project has a designated webcam that allows the public to view the entire construction process. The webcam can be viewed here. We have also uploaded some photos of construction and testing of the CGEs here.
By Robert Thompson, on May 11th, 2010
Papers by Dan, Steve, and Tim that were included in the GeoFlorida 2010 conference have been uploaded to our Publications page. Dan and Steve co-authored a paper on the test program of the base grouted drilled shafts for the Audubon Bridge. Tim co-authored a paper with Willie NeSmith of Berkel and Company Contractors, Inc. on plate load testing of displacement grout columns. Dan was also a co-author with several others on a paper on jet grouting for improved pile lateral capacity.
Dapp, S.D. and Brown, D.A. (2010). “Evaluation of Base Grouted Drilled Shafts at the Audubon Bridge”, GeoFlorida 2010, Advances in Analysis, Modeling and Design, Geotechnical Special Publication No. 199, ASCE, pp1553-1562.
Rollins, K.M., Herbst, M., Adsero, M. and Brown, D.A. (2010) “Jet Grouting and Soil Mixing for Increased Lateral Pile Group Resistance”, GeoFlorida 2010, Advances in Analysis, Modeling and Design, Geotechnical Special Publication No. 199, ASCE, pp1563-1572.
Siegel, T.C. and NeSmith, W.M. (2010). “Large-Scale Plate Load Testing of Ground Improvement Using Displacement Grout Columns”, GeoFlorida 2010, Advances in Analysis, Modeling and Design, Geotechnical Special Publication No. 199, ASCE, pp2398-2405.
By Robert Thompson, on August 17th, 2009
Paul was a co-author of another paper on jet grout columns based on a project at Tuttle Creek Dam near Manhattan, Kansas. This was a project Paul worked on when he was with the Corp of Engineers (Kansas City District). The extensive work performed at the site is yielding a lot of valuable information for the geo-engineering and geo-construction professions.
The paper is in the latest issue of the DFI Journal, published by the Deep Foundations Institute. Click on the image below or go to our Publications page.
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