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 Appearances

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

John Turner (March 27, 2012): Foundations for the Bridge at Pitkins Curve - GeoCongress 2012 - ASCE/Geo-Institute - Oakland, California

TBA (April 10-12, 2012): NHI Drilled Shaft Course - South Carolina DOT, Columbia, South Carolina

John Turner (May 7-10, 2012): Highway Geology Symposium, Redding, CA

Conferences, Meetings, Seminars, Workshops

ADSC SE Chapter Research Project – Lawrenceville, GA Site

Report Published (February 2, 2012)

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.

 

Presentation to Atlanta ASCE Geotechnical Group (11/15/11)

Robert presented the results at the ASCE Georgia Section Geotechnical Group meeting November 15, 2011 at 6:30pm at the Georgia Power Company’s Headquarters in Atlanta.

Lawrenceville Site Presentation – Atlanta, GA – Nov 15, 2011

 

Prediction Contest Winners Announced (10/6/11)

Report of Contest Winners

 

Photos and from Field Day (8/18/11)

Photograph slide show or Web Album

 

Photos and Report from Construction (8/5/11)

Observation Report (updated 8/12/11)

Photograph slide show or Web Album

 

Field Day Scheduled (7/31/11)

August 18th 10:00 AM – ADSC/ASCE Load Test Program Field Day

Foundation Technologies, Inc.

1400 Progress Industrial Blvd.

Lawrenceville, GA 30043
View Larger Map

Shaft Installation and Prediction Contest (7/21/11)

The test shafts will be installed July 26 – 29th. Two test shafts will be installed – one to attempt to test the competent rock and one to attempt to test the PWR (partially weathered rock – in the Piedmont area, the highly weathered upper rock zone is often termed PWR). Testing will occur during a field demonstration day in mid-August.

We will hold a prediction contest for the Lawrenceville site. Contestants are encouraged to download the information linked below and then submit their predictions of unit side resistance and base resistance that will be measured by the O-cell tests.  The winner will be announced at the field test and demonstration day on site, as well as published in this blog along with all submitted predictions.

Information to include the test shaft configurations and exploratory boring data can be downloaded here.

The contest entry form along with instructions for submission can be downloaded here.

We will have Aaron on site to observe and take lots of pictures.  We’ll post his photos of the excavations as soon as we can to assist in making predictions.

All predictions must be submitted by the close of business, August 12, 2011.

Schedule Update (6/27/11)

From Bruce Long, Long Foundation Drilling, Inc.:

To Fellow Load Testers,

We want to thank everyone who submitted questions or comments regarding the preliminary load test program submitted to us by Dr. Dan Brown.  Those comments, and more, will be considered while fine-tuning the program.

Because we have several companies donating their time and money, we have to be flexible with respect to the installation and testing dates.  We have tentatively selected some dates, but these are subject to change depending upon the workloads of those volunteering their efforts.  We hope to begin shaft installation during the last two weeks of July (weeks beginning the 18th or 25th).  The actual load testing would probably take place the week of August 8th, with the actual test date being decided upon by sometime in early July (I hope to give everyone at least a 3-4 week notice).

The actual test date would include a field day visit by all interested parties to the test site at Foundation Technologies office in Lawrenceville, GA.  Activities will include a load testing discussion led by Dr. Dan Brown, along with lunch.  We would then move to the test site where Loadtest, Inc. will be conducting the Osterberg Load Test on our first shaft.  A discussion of the testing process and procedures by Loadtest will precede the actual testing (We will be submitting information later regarding a load test contest where each of you will get to predict the outcome of the test with a special prize going to the winner).  We also hope to be drilling on the second shaft that day and will be discussing the drill rigs, tools, and other equipment being used, as well as having the other Osterberg cell available for viewing.  This site visit proved to be very well received when we did it in Nashville at the last load test.  We hope for a big turnout that day.

Load Test Plan (May 2011)

The load test plan memo by Dan and the boring data are linked below. Bruce Long (Long Foundation Drilling Company) is the lead for the ADSC on this project and has requested interested parties to provide comment on the test plan. An abbreviated note from Bruce is below (full message from Bruce is here):

First, I would like for everyone to know that the load test program jointly planned between the Atlanta area ASCE Geotechnical community and the Southeast Chapter of the ADSC is alive and well despite some longer than planned delays. The final boring data has been in hand for some time and Dan Brown and his group have reviewed this information and submitted a preliminary load test program for review and comment.

Please take time to review this information and e-mail or call me with any comments that you might have. As soon as all comments have been reviewed, we will let everyone know our plan to proceed. I would like to have comments submitted to me by May 27, 2011. If there are any questions regarding our plans, schedule, etc., please feel free to contact me at your convenience.

Comments should be sent to Bruce Long at blong@lfdc.com.

Load Test Plan Memo from Dan Brown (20 May 2010)

Summary of Test Borings from GeoHydro Engineers (26 Jan 2010)

Archives

GeotechSearch.com

DBA Photo Albums

ADSC SE Drilled Shaft Research Project, Lawrenceville, GA Test SiteDBA Honors and Awards
JJA Pictures from Chris Ursery (FIGG)Hastings Bridge Construction
Ownesboro Hospital Ground ImprovementArtistic Construction - Vol 1
JJA Construction 2010LPV-145 Test Piles 2009-2010
DFI 2009JJA Construction - Shaft 3W South Load Test - October 2009
Huey P. Long Bridge Drilled Shafts - October 2009JJA Construction - Pier 2W - September 2009 Photos
Univ Kansas Research - Lateral Load Test on Drilled ShaftsHuey P. Long Bridge, New Orleans - Test Shaft Construction - July 16-19, 2009
GIWW West Closure Complex Test Piles June and July 2009Garden State Parkway Mullica River Bridge - Test Shaft Construction - June 2009