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 Robert Thompson, on February 2nd, 2012
The report for the ADSC Southeast Chapter Lawrenceville, Georgia Test Site is complete and published (link below).
This is the second report from their research project on rock-socketed drilled shafts in the Southeast U.S. This report is from the Lawrenceville, Georgia test site where shafts constructed in metamorphic rock of the Piedmont geologic province were load tested using the O-Cell load test device. The report link is below. Additional information about the test site can be found at the Lawrenceville Site Page.
The first site of this project was in Nashville, Tennessee where shafts constructed in limestone were tested. Information on the Nashville Site and the test reports can be found at the Nashville Site Page.
Both reports will be the feature of a paper and presentation by Robert at the 2012 ADSC Expo, March 13-17, in San Antonio, TX. More information about the Expo can be found here.
Thompson, W.R., Brown, D.A., and Hudson, A.B. (2012). “Load Testing of Drilled Shaft Foundations in Piedmont Rock, Lawrenceville, GA, Report for ADSC Southeast Chapter, January, 2012.
By Robert Thompson, on January 24th, 2012
The drilled shaft foundations for the new I-70 Mississippi River Bridge in St. Louis, MO are the subject of two recent papers written by Paul and Dan and published by DFI. Dan presented the paper focusing on the Alternate Technical Concept (ATC) process at the DFI 36th Annual Conference in October. (previous post here). A case history paper by Paul and Dan was published last month in Volume 5, Number 2 of the DFI Journal. Links to the papers are below, as well as on our Publications page. Other posts on this bridge are here.
Brown, D.A., Axtell, P.J., and Kelley, J. (2011). “The Alternate Technical Concept Process for the Foundations at the New Mississippi River Bridge, St. Louis”, Proceedings of the 36th Annual Conference on Deep Foundations, 2011, Boston, MA, USA, pp171-177.
This paper was originally published in the Proceedings of the 36th Annual Conference on Deep Foundations, the 2011 annual meeting of DFI. Go to www.dfi.org to purchase the procedings or for further information.
Axtell, P.J. and Brown, D.A. (2011). “Case History – Foundations for the New Mississippi River Bridge – St.Louis”, DFI Journal Volume 5, Number 2, December 2011, Deep Foundations Institute, pp3-15.
This paper was originally published in DFI’s bi-annual journal, Volume 5, No. 2 in December 2011. 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 Robert Thompson, on December 18th, 2011
By Robert Thompson, on November 17th, 2011
DFI held its 36th Annual Meeting October 18-21 in Boston, including the annual awards banquet. Dan was honored with the 2011 Distinguished Service Award at the banquet. The Christopher S. Bond Bridge in Kansas City, MO was honored with a Special Recognition award (one of 5 runners-up for the Outstanding Project Award). Photos of DBA folks at the event are posted below. All of the photos from the meeting can be found at this link.
Dan gave a presentation on the Alternate Technical Concept (ATC) that DBA supported for the I-70 Bridge over the Mississippi River in St. Louis, MO. The link to the presentation is below. (Some previous posts here and here and here; posts with links to other presentations here).
PowerPoint Presentation – Alternate Technical Concept: Foundations for the New Mississippi River Bridge, St. Louis – Dan Brown, Ph.D., P.E – DFI 36th Annual Conference, Boston, MA, October 20, 2011.

Dan receiving the 2011 DFI Distinguished Service Award

Robert receiving the Special Recognition Award for the Christopher S. Bond Bridge Project

Paul and Erik at the reception before the awards banquet
By Robert Thompson, on November 4th, 2011
DBA is pleased to announce that Dr. D. Michael Holloway, P.E. has joined the DBA team. Mike is a recognized expert in driven pile foundation design and dynamic testing, in-situ testing, instrumentation, and earthquake engineering. His over 40 years of foundation and geotechnical engineering experience includes stints at the U.S. Army Corps of Engineers Waterways Experiment Station (WES) in Vicksburg, MS, and Woodward-Clyde Consultants in Oakland, CA. He founded InsituTech, which specialized in engineering deep foundations and applying insitu soil testing services.
When starting InsituTech, Mike broadened the professional practice beyond “conventional” PDA-related testing and analyses services. Rather than just test and report to satisfy QC requirements during construction, he applied dynamic testing and analyses to enhance foundation design and constructability, as well as to improve on-site troubleshooting of construction problems. The efforts paid off as the firm made significant changes in the way PDA services became integrated into the design/build process on several major marine facilities and bridge projects in the west and in the Pacific.
Mike is a Blue Devil, having earned his B.S., M.S., and Ph.D. at Duke University in North Carolina. Raised in New York, he made his way to California seeking engineering gold soon after his time at WES. He has been based there ever since.
Mike’s presence in California makes DBA a practically coast-to-coast firm (well, at least East Tennessee to California). We at DBA are excited at the expertise Mike adds to our portfolio and look forward to his contributions to the team. Welcome, Mike!
Holloway DBA Announcement (Press Release)
By Robert Thompson, on November 2nd, 2011

Dan and Steve co-authored an article in the Fall 2011 issue of Deep Foundations (from DFI) that covered the foundations for the recently completed record-setting Audubon Bridge in Louisiana. Dan and Steve cover not only the shaft testing, design, and construction, but also the unique cofferdam used for the tower foundations. I recently highlighted an article by Sereno Brown, P.E. of Flatiron that covered the design and installation of the cofferdam in detail.
You can receive Deep Foundations every quarter (soon bi-monthly!), as well as the DFI Journal, by joining DFI. Get information on joining at this link – click on “Membership” at the top banner.
By Robert Thompson, on October 11th, 2011
During a recent trip to Taiwan, Steve had the opportunity to participate in a lecture on base grouted drilled shaft foundations. He was invited to speak at a meeting of the Chinese Taipei Geotechnical Society (CTGS), also known as the Taiwan Geotechnical Society (TGS), by Dr. Prof. San-Shyan, Lin, National Taiwan Ocean University (current president of TGS). The meeting was held at the National Taiwan University of Science and Technology.
His visit on 21 June 2011 was noted in the August 2011 issue (Volume 5, No. 4, p82) of the ISSMGE Bulletin. During his lecture, Steve talked about the experiences of DBA with base grouting drilled shafts at the Audubon Bridge and the Huey P. Long Bridge on the Mississippi River in Louisiana. Steve said that base grouting has become a very common technology in Taiwan for high rise structures supported on drilled shafts.
The meeting is noted here on the TGS site.

(Source: ISSMGE Bulletin Volume 5, No. 4, p82)
By Robert Thompson, on October 6th, 2011
That’s right load test fans, The results are in! The ADSC Southeast Chapter is proud to announce the “winners” from the prediction contest for the Lawrenceville, GA test site. In the table below, we have listed the winner and their prediction. The winners are the closest to the average measured values as reported by Loadtest, Inc and may not represent the reported maximum values recommended in the final report by DBA. We won’t release the final report until the ASCE Georgia Section Geotechnical Group meeting November 15, 2011 at 6:30pm at the Georgia Power Company’s Headquarters in Atlanta. Dr. Brown will be presenting the findings then – so come to the meeting and get it first, or look to the DBA or ADSC web sites after November 15th to get the report.
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Shaft
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Name
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Prediction
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1 – Unit Base Resistance
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Gloria Rodgers
(Building and Earth Sciences, Inc.)
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750 ksf
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1 – Unit Side Resistance
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Todd Barber (Geo-Hydro Engineers, Inc.)
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50 ksf
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2 – Unit Base Resistance
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Todd Barber (Geo-Hydro Engineers, Inc.)
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690 ksf
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2 – Unit Side Resistance
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TIE:
Jim Pegues (Southern Company Svcs.)
Tom Scruggs (Georgia DOT)
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3 ksf
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By Robert Thompson, on October 2nd, 2011
Greetings to all Terzaghi fans! Yes, it is that time of year again, where our thoughts turn to the anniversary of the birth of one of the greats in our field.
Last year I had a football themed post (college football, in case you were wondering…and that is American football for our fans outside the U.S.) since Terzaghi’s birthday was on a Saturday. Since I am not a big pro football fan, and since I used football last year, I figured I would do something different for this year’s weekend post.
The August 2011 edition of the International Society for Soil Mechanics and Geotechnical Engineering ISSMGE Bulletin is headlined with an article on the history of ISSMGE: “THE ISSMGE FROM 1936 TO 2011 A RETROSPECTIVE ON THE OCCASION OF THE 75TH PLATINUM JUBILEE ANNIVERSARY” by Kenji Ishihara and Michele Jamiolkowski. The Bulletin is in two parts at this link. The article is an outstanding work providing an excellent account of the start of ISSMGE as an international conference and its evolution into the ISSMGE we know today.
It should be no surprise that Prof. Terzaghi was very active and one of the key figures in the formation and success of ISSMGE, which began as the International Conference on Soil Mechanics and Foundation Engineering (ICSMFE). Many of the giants of soil mechanics and geotechnical engineering on which we base al of our work were instrumental in the start of ICSMFE and its impacts on our profession. As for that time in history (1936) and how it was important to our field:
The time had come to hold a Conference aimed at exchanging and sharing information on Earth and Foundation Engineering.
It was Professor Arthur Casagrande (assistant professor of Harvard University) who sensed the timing, conceived the idea and carried out the herculean task of running the conference all the way through, in his role of Secretary General, with K. Terzaghi (Professor of Technical University of Vienna and visiting Professor of Harvard University) as Chairman. Professor Peck once remarked “Our Society owes an enormous debt to Arthur Casagrande for his conviction that the time was right for the International Conference and to his tremendous efforts to organize it“.
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Since the first ICMSFE was so successful, it became clear that the Conference should not remain a one-off event but should, instead, be continued within a few years, possibly being held in Holland where earthwork engineering is so crucial to the country.
It was also requested to set up a permanent international organization. Thus it was decided to establish International Committees consisting of National Committees with K. Terzaghi as President and A. Casagrande as Secretary. It was also decided that at the next Conference the International Committees would submit the draft of the Constitution and of the By-laws, which are essential for the Society to become a permanent organization.
There was at that time a widespread awareness that it was the moment to set up a common denominator institution that would group engineers with diverse backgrounds but involved in our discipline.
Portion of group photo from 1st ICSMFE, 1936. (From ISSMGE Bulletin Vol 5, No 4, August 2011, p3)
Photo of Terzaghi addressing the opening session of the 4th ICSMFE, 1957. (From ISSMGE Bulletin Vol 5, No 4, August 2011, p7)
And the rest, as the saying goes, is history!
As an editorial note on the first year, Ishihara and Jamiolkowski offer this observation:
It is commonly recognized that K. Terzaghi is the originator of modern soil mechanics and foundation engineering and therefore father of our profession. After tracing the history of development, the writers had a strong belief that this is true. Not only was he always a leading figure in the forefront, but he conveyed strong messages on the role and importance of the soil mechanics and foundation engineering every time he participated in the ICSMFE. We are very much impressed by his enthusiastic and heartfelt message to our community.
No less important was the role played by Arthur Casagrande. He was instrumental in persuading the President of Harvard University to host the conference and carrying out all arrangements for organizing the first International Conference on Soil Mechanics and Foundation Engineering. The great success of this conference contributed greatly for establishing the place of soil mechanics in engineering practice throughout the world. He also dedicated himself to the ISSMFE as the 3rd President between the periods of 1961 in Montreal to 1965 in Paris.
There is a saying that for a great religion to be established, there always are two key-role playing giants. For Christianity Jesus Christ is the originator and his disciple Saint Paul was the great evangelist. For Greek philosophy, Socrates was the great philosopher and it was Plato who was the greatest disciple. Terzaghi and Casagrande are considered as a combination in the same context. Without Terzaghi, Casagrande would not have been so well-known. Had there not been Casagrande, the fame of Terzaghi would have developed in a different format.
Now neither I nor the authors are suggesting that soil mechanics is a religion, but their point on the timing and combination of Terzaghi’s and Casagrande’s work was critical to what we see as the field of soil mechanics/geotechnical engineering today. Without these two and others seeing a need, taking charge, and filling that need, we could very well be viewing things from a completely different framework.
So as we reflect on this celebrated day, let’s remember not only Prof. Terzaghi’s great technical achievements, but also his role as a leader (along with many others) shaping our field of practice and our professional societies.
By Robert Thompson, on September 26th, 2011
It seems that social media and on-line communications have become a major part of our day-to-day communications. If you are like me (Robert), I find it rather annoying at times to filter through what you get to find what you really want or need. Now there is an on-line social networking/community for the geoengineering field – GeoWorld. This new “spot on the web” is a collaboration of Geoengineer.org and ISSMGE (International Society for Soil Mechanics and Geotechnical Engineering).
After more than two years of development, Geoengineer.org, in collaboration with the ISSMGE, is pleased to announce the development of Geoworld!
Geoworld is a new, free, professional networking platform for professionals, companies and professional organizations in the geoengineering profession. It promotes professional networking, collaborations and information dissemination at a global scale.
Geoworld revolutionizes the way information is circulated and even generated in the geoengineering field. It will serve as a platform to promote professional interactions, foster the formation of formal and informal groups, and support innovation in the geoengineering field at a global scale.
Geoworld is very easy to use and powerful, and has features that are specifically suited for geotechnical engineering professionals. Hundreds of geotechnical engineers as well as companies and organizations have already joined since the first announcement of Geoworld last week.
Here is a video link introducing Geoworld.
Look for DBA and ask to become a Contact. Also look for me and other DBA folks. See you there!
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