Get the New FHWA Drilled Shaft Manual
Get the NCHRP Synthesis 418 – Pile Criteria From Test Pile Data
Dan’s Speaking Schedule March 16, 2012 - "Advanced" Design and Construction Issues with Drilled Shaft Foundations; Case Histories - ADSC Equipment EXPO and Technical Conference - San Antonio, Texas
March 26-28, 2012 - State of the Art and Practice for Drilled Foundations - GeoCongress 2012 - ASCE/Geo-Institute - San Francisco, California
Other DBA Team Speaking Appearences Tim Siegel (January 22, 2012): Innovative Techniques for Characterizing Karst Terrain, Workshop on Geo-innovation in Subsurface Exploration, TRB Annual Meeting, Washington, D.C.
John Turner and Robert Thompson (February 21-23, 2012): NHI Drilled Shaft Course - Kansas DOT, Topeka, Kansas
Robert Thompson (February 24, 2012): Conservatism in Drilled Shaft Design When
Utilizing Rock Sockets, Alabama Transportation Conference, Montgomery, Alabama
Tim Siegel (March 15, 2012): Micropile Design Installation and Performance for the Foothills Parkway, ADSC Equipment EXPO and Technical Conference, San Antonio, Texas
Robert Thompson (March 15, 2012): Full-Scale Load Tests on Drilled Shafts in Tennessee and Georgia, ADSC Equipment EXPO and Technical Conference, San Antonio, Texas
Erik Loehr (March 15, 2012): Slope Stabilization Using Micropiles, ADSC Equipment EXPO and Technical Conference, San Antonio, Texas
TBA (April 10-12, 2012): NHI Drilled Shaft Course - South Carolina DOT, Columbia, South Carolina
Conferences, Meetings, Seminars, Workshops
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By David Graham, on March 9th, 2011
A technical note by Tim that appeared in the December 2010 issue of the DFI Journal has been added to our publications page. Tim’s note examines some issues related to axial load testing of augered cast-in-place (ACIP) piles, also know as augercast piles or CFA piles, that are not covered in ASTM D 1143/D 1143M-07 Standard Test Methods for Deep Foundations Under Static Axial Compression. Specifically, load hold time, unload-reload cycles, and fluctuations in incremental load are discussed as they relate to load testing for determining axial capacity or axial load distribution of ACIP piles. Details of instrumented ACIP pile load testing are also covered.
Siegel, T.C. (2010). “Load Testing and Interpretation of Instrumented Augered Cast-in-Place Piles”, DFI Journal Volume 4, No. 2, December 2010, Deep Foundations Institute, pp69-71.
DFI requests that the following be included with all DFI papers we post:
“This paper was originally published in DFI’s bi-annual journal, Volume 4, No. 2 in December 2010. DFI is an international technical association of firms and individuals involved in the deep foundations and related industry. The DFI Journal is a member publication. To join DFI and receive the journal, go to www.dfi.org for further information. ”
By David Graham, on December 10th, 2010
The new I-70 bridge over the Mississippi River near St. Louis, Missouri is quite the project. When completed, it will be the third longest cable-stayed bridge in the United States, with a 1,500-ft main span. Most significantly for the geotechnical community, the bridge made history when one of its 11-ft diameter drilled shafts resisted a world record breaking 36,000 tons (bi-directional) during an O-cell load test. The bridge has already seen press in Civil Engineering Magazine (July 2010, page 30-32), at ENR.com, and in a post by Robert on this blog. Now, an article by DBA’s Paul Axtell is featured in the September/October issue of Foundation Drilling Magazine. The editor summarized the article saying:
The information in the following article is a composite of material that came to Foundation Drilling Magazine from three separate sources. Part I is based on information gleaned from an article that was published on the Associated Press news wire. Part II is excerpted from ENR’s August 18th, E-Newsletter. Part III was provided by Paul Axtell and Dan Brown of ADSC Technical Affiliate company, Dan Brown and Associates. The bridge project is of interest in general. The Osterberg Load Cell test will be of particular interest to professionals in the deep foundation industry, and specifically for those who work in the drilled shaft segment.
Axtell, P.J. (2010). “Mississippi River Bridge Project Includes Record Load Test: A Three Part Story”, Foundation Drilling, Vol. 31, No. 7 September/October 2010.
By Robert Thompson, on December 18th, 2009
By Robert Thompson, on May 5th, 2009
 Main Pylon under construction for Bond Bridge, Kansas City, MO Work by DBA is all but compete on the kcICON project. All drilled shafts have been installed and base grouted. Construction of the shafts went very well, with no significant issues. Hayes Drilling installed all of the land-based shafts. AFT performed all of the base grouting.
The main pylon in the river continues to take shape. It won’t be long before PCC will have it looking like a bridge!
Paul has been “enjoying” observing drilled shafts at night and base grouting during the day. A collection of some of his photos from the last bits of shaft construction are below. He got some great shots of the pylon, including some out in the river.
More pictures here.
Previous post here.
By Robert Thompson, on April 27th, 2009
By Robert Thompson, on March 25th, 2009
Last week’s International Foundation Congress and Equipment Exposition was a huge success! Dan gave a keynote address on Tuesday on managing risk in deep foundations within the design-build delivery model. Paul, Erik, and I also had papers to present. The technical sessions were excellent, the indoor exhibits were excellent, and the outdoor exhibits of foundation equipment were outstanding! The ADSC, Geo-Institute, and PDCA were the co-organizers of the event. A big hats off to all of the staff of all three organizations that made the event a huge success! Thanks and “atta boy” go to Mohamad Hussein, P.E. (Conference Chair) and to Dan (Technical Program Chair) for all of their work, as well as the rest of the organizing committee.
I have also blogged about the conference here at GeoPrac.net.
Here are some pictures of the outdoor exhibits:
  
There were over 300 papers included in the conference. The proceedings were published as three Geotechnical Special Publications:
GSP 185: Contemporary Topics in Deep Foundations
GSP 186: Contemporary Topics in In-Situ Testing, Analysis, and Reliability of Foundations
GSP 187: Contemporary Topics in Ground Modification, Problem Soils, and Geo-Support
The editors, Magued Iskander, Ph.D., P.E. (Polytechnic Institute of New York University), Debra Laefer, Ph.D. (University College Dublin, Ireland), and Mohamad Hussein, P.E. (GRL) all had their work cut out for them.
I have added all seven papers authored by DBA team members to our site. The links are below, or you can go to our Publications page.
Axtell, P.J., Stark, T.D., and Dillon, J.C., 2009. “Strength Difference Between Clam-Shell and Long-Reach Excavator Constructed Cement-Bentonite Self-Hardening Slurry Walls”, 2009 International Foundation Congress and Equipment Expo, Contemporary Topics in Ground Modification, Problem Soils, and Geo-Support, Geotechnical Special Publication No. 187, ASCE, pp. 297-304.
Brown, D.A., 2009. “Management of Risk in Deep Foundations with Design-Build”, 2009 International Foundation Congress and Equipment Expo, Contemporary Topics in Deep Foundations, Geotechnical Special Publication No. 185, ASCE, pp. 1-11. Brown, D.A. and Thompson, W.R., 2009. “Drilled Shaft Performance in Cemented Calcareous Formations in the Southeast United States”, 2009 International Foundation Congress and Equipment Expo, Contemporary Topics in Deep Foundations, Geotechnical Special Publication No. 185, ASCE, pp. 119-126.
Loehr, J.E and Huaco, D.R., 2009. “Probabilistic Calibration of Resistance Factors for Slope Stability”, 2009 International Foundation Congress and Equipment Expo, Contemporary Topics in In-Situ Testing, Analysis, and Reliability of Foundations, Geotechnical Special Publication No. 186, ASCE, pp. 297-304.
Parsons, R.L., Pierson, M., Han, J., Brennan, J.J., and Brown, D.A., 2009. “Lateral Load Capacity of Cast-in-Place Shafts Behind an MSE Wall”, 2009 International Foundation Congress and Equipment Expo, Contemporary Topics in In-Situ Testing, Analysis, and Reliability of Foundations, Geotechnical Special Publication No. 186, ASCE, pp. 560-567.
Rollins, K.M., Adsero, M.E., and Brown, D.A., 2009. “Jet Grouting to Increase Lateral Resistance of Pile Group in Soft Clay”, 2009 International Foundation Congress and Equipment Expo, Contemporary Topics in Ground Modification, Problem Soils, and Geo-Support, Geotechnical Special Publication No. 187, ASCE, pp. 265-272.
Thompson, W.R., Hill, J.R., and Loehr, J. E., 2009. “Case History: Value Engineering of Driven H-Piles for Slope Stability on the Missouri River”, 2009 International Foundation Congress and Equipment Expo, Contemporary Topics in Deep Foundations, Geotechnical Special Publication No. 185, ASCE, pp207-214.
By Robert Thompson, on January 14th, 2009
I have been too busy to post more photos from my trips to New Roads, LA in the fall to help Steve with the work at the Audubon Bridge project. It has been a flurry of activity as they worked to finish installing, tip-routing, and load testing all of the shafts in the river (done in December!). They have also completed and tested the land test shaft on the west side of the river and begun installing the land shafts. Throw in a lot of pile driving, including some 5-foot diameter pipe piles for temporary bents, and it has been a very busy site. All of the various tip-grouting, O-cell load tests on drilled shafts, and PDA testing of the pre-cast piles has been successful. As of today, the Mississippi River has come up and slowed things down a bit, but they should get all of the foundation completed within the next couple of months.
Some pictures I took on some of my trips are setup below. I have also experimented with embedding some video I took with my camera. The camera was not set on a very high video capture resolution, but I think they are good enough for you to get the idea of the shaft excavation and the pile driving activities.
More pictures here.
Previous posts here.
East Pier Construction – September 2008:
East Temporary Bent Pile Driving – September 2008:
West Side Construction and Other Stuff – October 2008:
By Robert Thompson, on November 30th, 2007
11/30-07 Update! – GEC No. 8 is now up on the FHWA web site. You can download it here.
Yes, folks, GEC 8 is finally complete! The publication version of Geotechnical Engineering Circular No.8: Design and Construction of Continuous Flight Auger Piles will soon be available from the FHWA Geotechnical Web Site. If you want an official sneak peek at GEC 8, just click here to get the PDF (approx. 10 MB). This circular is part of FHWA’s efforts to implement the use of CFA piles as a viable foundation alternative for transportation structures. We’ll post a notice when GEC 8 is on the FHWA web site.
By Robert Thompson, on November 27th, 2007
A preliminary call for papers has been released for the International Foundation Congress and Equipment Expo 2009 (IFCEE ’09) to be held in Orlando, Florida March 15-19, 2009. The meeting is a joint venture of The Geo-Institute of ASCE (GI), The International Association of Foundation Drilling (ADSC) and The Pile Driving Contractors Association (PDCA).
Information about the call for papers is here.
I’ll have links to the conference web site once it is up and running, as well as blogging additionla information when available. This promises to be a great conference much like the 2004 Geo-Support Conference.
Technorati : Deep Foundations, Engineering Research, Foundation Construction, Foundations, Geotechnical Engineering
By Robert Thompson, on August 17th, 2007
Dan will be one of eleven speakers at the ADSC’s Northeast Chapter Drilled Shaft Foundation Seminar. From the ADSC’s August 2007 edition of The Hole Story:
” The seminar will be held by the ADSC Northeast Chapter on November 14, in East Elmhurst, NY,at the Wyndham Garden Hotel, located at LaGuardia Airport. Eleven presenters drawn from the ranks of the nation’s top design, construction and testing practitioners will cover drilled shaft design, specifications, construction, concrete design, testing, as well as geotechnical investigation, and remediation techniques. An opportunity to visit with exhibitors will add to the seminar’s value. Among the featured presenters will be Dr. Dan Brown, P.E., Auburn University; Silas Nichols of the FHWA; Dr. Bernie Hertlein, P.E., STS Consultants; and Fred Rhyner, P.E., Mueser Rutledge. Internationally prominent design engineer Clyde Baker, STS Consultants will moderate a Q&A Panel. PDH credits are offered. For information including registration details, contact Ralph Capelli, 712/353-9616 or rcapelli@posillicorp.com.”
Technorati : Case History, Deep Foundations, Drilled Piles, Drilled Shafts, Foundation Construction, Foundations, Geotechnical Engineering
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ADSC Drilled Shaft Foundations Seminar – Mar 19
PDCA 14th Annual International Conference and Expo – May 6-8
TRB 7th International Bridge Conference – Dec 1-2
