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
|
By Robert Thompson, on June 13th, 2011
Dr. Erik Loehr, P.E. was honored by the ADSC with the ADSC Outstanding Service Award, presented at the President’s Luncheon at their 2011 annual meeting in New Orleans, Louisiana (Feb 1 –5, 2011). The award recognized Erik’s research in the use of micropiles for slope stabilization and as foundations. From the March/April 2011 edition of Foundation Drilling:
ADSC’s Outstanding Service Award was garnered by Dr. J. Erik Loehr, University of Missouri, in acknowledgment of his research and educational efforts that advance the technical aspects of the drilled foundation and anchored earth retention industries.
Dr. Loehr is currently on the faculty of the University of Missouri and is a consultant with DBA.
By David Graham, on December 8th, 2010
An article by Eric and Dan on the use of micropiles for slope stabilization has been added to our Publications Page. Published in the August 2010 issue of Foundation Drilling Magazine, the article summarizes key findings and recommendations from a study that reviewed and evaluated existing micropile design methods. A new design method is proposed to better predict the mobilized resistance of micropiles used for slope stabilization. The full report prepared by Eric and Dan for the joint ADSC/DFI Micropile Committee, “A Method for Predicting Mobilization Resistance for Micropiles Used in Slope Stabilization Applications”, presents the details of this study. Robert previously posted about this report here.
 Loehr, J.E. and Brown, D.A. (2010). “Design of Micropiles for Slope Stabilization”, Foundation Drilling, Vol. 31, No. 6 August 2010.
By Robert Thompson, on December 18th, 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 21st, 2008
Erik and Dan have published a final report entitled “A Method for Predicting Mobilization Resistance for Micropiles Used in Slope Stabilization Applications”. The report was prepared for the Joint ADSC/DFI Micropile Committee. This version has been submitted to the committee for review and comment. From the report:
The primary objective of the work described in this report has been to identify a method for predicting the resistance provided by micropiles used for slope stabilization that: (1) is consistent with the available field performance data, and (2) takes advantage of the improved knowledge gained from the performance observed in previous implementations. This objective has been met through review and analysis of case histories with well documented performance measurements, analysis of stability and load transfer for these case histories, development of an improved technique for predicting the resistance provided by micropiles, evaluation of the proposed technique as compared to available field performance measurements, and, finally, use of the technique to demonstrate its application for a hypothetical case and to demonstrate the implications of the technique for design of slope stabilization schemes with micropiles.
This report should be a great resource to practicing geotechnical engineers considering micropiles for slope stabilization.
Financial support for this work was provided by a grant from the H.B. Williams Industry Advancement Fund of ADSC: The International Association of Foundation Drilling.
A copy of the report can be downloaded here.
Technorati : Engineering Research, Geotechnical Engineering, Micropiles
|
|
|
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
