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

Dr. Mike Holloway, P.E. comes aboard!

11_Mike_sDBA 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)

Audubon Bridge Foundations in Fall 2011 “Deep Foundations”

DFI Fall 2011_Audubon

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.

Happy Karl Terzaghi’s Birthday 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“.

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.

Now Published! NCHRP Synthesis 418–Developing Production Pile Driving Criteria From Test Pile Data

nchrp_syn_418 - pile criteria from test pilesThe Transportation Research Board of the National Academies has published a National Cooperative Highway Research Program synthesis report by Dan and Robert: NCHRP Synthesis 418–Developing Production Pile Driving Criteria From Test Pile Data. This synthesis provides a survey of the current practices used by transportation agencies to develop pile driving criteria, with special attention on the use of test pile data. The report covers issues related to developing driving criteria, the current practices used by the responding agencies, recommended useful practices that were identified, along with descriptions of the practical approach several agencies use to integrate a range of technologies to develop pile driving criteria under typical conditions. The information collected indicates that practices used by transportation agencies to develop pile driving criteria for production pile installation can be described as highly variable in terms of the level and sophistication of the testing performed.

Included in the report are:

  • Responses from a survey sent to all 50 state departments of transportation plus the District of Columbia and Puerto Rico (44 of the 52 agencies provided responses).
  • Interviews performed by telephone or in-person of nine of the responding agencies selected based on the written survey responses.
  • A comprehensive literature review on the range of practices included in test pile programs and their use in developing production pile driving criteria.
  • Discussions of the survey results.
  • Useful practices identified from the surveys.
  • Identification of research needs for this topic.

To purchase the print version of this report or get a PDF, follow this link to TRB.  Click the “View This PDF” to get the PDF.

Please note that if you order the printed version,  Appendices B and C (copies of the completed survey forms and interview notes) are available via download only.

ADSC Load Test Research – Lawrenceville, GA Site – SCHEDULE UPDATE

The planned second load test in the ADSC research project for rock sockets in the Southeastern U.S. is moving closer to execution.  Bruce Long of Long Foundation Drilling Company provides this update:

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. 

I wanted to give everybody a brief update and will be in touch when additional information becomes available in the near future.  Thank you for your interest, and if anyone has any questions regarding this plan, please feel free to call me at your convenience.

Bruce Long

President

Long Foundation Drilling Co.

Previous post is here.

The test site page is here.

The main page for the research project is here.

Audubon Bridge Closure–The Span is Complete!

On December 29, 2010, Audubon Bridge Constructors recently “closed” the main span of the John James Audubon Bridge between New Roads and St. Francisville, Louisiana.   Watch the video featured at the top of the page at the bridge link to hear about the bridge, including the drilled shaft foundations!  For something really fascinating, go to the webcams here and scroll back through the various dates.  They have archived images all the way back to start of construction.

Photo: Chris Usery, Figg Bridge Inspectors

The last cables were installed on January 3, 2011 as noted on the project website:

 

The last two cable stays of the longest cable-stayed bridge in the Western Hemisphere were installed on January 3, 2011, five days after the spans were connected. The John James Audubon Bridge, Louisiana’s newest crossing over the Mississippi River, now has all of its 136 cable stays in place.

This bridge will be the longest cable-stayed bridge in North America when it opens later in 2011.  Again, from the project web site:

The spans of the longest cable-stayed bridge in the Western Hemisphere were connected on December 29, 2010, stretching 1/3 of a mile over the Mississippi River. The John James Audubon Bridge, connecting Pointe Coupee and West Feliciana parishes in Louisiana, is approximately 92% complete. Construction of the spans began from both sides of the 500-foot tall towers earlier this year. Both sides continue to progress at a rapid pace, and now the meeting of the spans has occurred.

Steve Dapp and I had the pleasure of working with many great people during our time on site (much more time for Steve than for me!) during foundation construction.  One of them, Chris Ursery of Figg Bridge Inspectors, has been great about providing us with photos now and then to keep us updated of some of the details of the bridge construction.  Chris has granted us permission to share a few of his recent photos, which are shown below or can be seen in our web albums here.

Previous post on Audubon Bridge.

Ownensboro Hospital Ground Improvement Project Photos and Webcam Online

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.

kcICON Project Opens Ahead of Schedule

demo 1The kcICON project in Kansas City has been completed six months ahead of schedule and within budget with all lanes and ramps being open on December 18th.  Demolition has begun on the existing Paseo bridge.  You can see some photos of the demolition (like the one in this post – thanks kcICON!) at their Facebook page.  It was a great experience for us to have been a part of this project.  If you want to see all of our previous posts on this, click here.  Other points of interest are linked below.

 

The Kansas City District of MoDOT

ENR 

DBA Project Page

kcICON Facebook Page

kcICON web page

kcICON Bridge Nears Completion

Paul received a few photos of the kcICON bridge that are just too cool not to share.  These were sent to him by Massman Construction. These were taken in September of this year.  MoDOT’s Flicker album of the dedication ceremony is here. The new bridge was dedicated and partially opened to traffic (southbound) on September 27th.   The northbound traffic was shifted to the new structure on October 22nd.  All of the bridges and ramps for the project will be opened by the end of the year – 6 months ahead of schedule.  Can’t wait to see it after the exisitng bridge is demoloshed, though it is a pretty cool image with the old and new bridges together.  Updates for the project are on the project Facebook Page.

Click here for previous posts on kcICON.

 

Picture

 

KcICON Bridge 100928 View of Pylon_s

 

 

 

kcICON Bridge 220910 Pylon

A Foundation Engineering Trip Down the Mississippi River

A Foundation Engineering Trip_Brown_STGEC 2010Dan recently played the part of storyteller at the Southeastern Transportation Geotechnical Engineering Conference  (STGEC) 2010 conference in Charleston, West Virginia when he gave the lunch presentation on the conference’s first day.  He took the audience on a trip down the Mississippi River from a foundation engineer’s perspective, talking about several bridges that DBA has had the pleasure to work on, or is still working on, along the river the last few years.  Dan began with the I-35W Bridge replacement in Minneapolis, Minnesota and ended at the Huey P. Long Bridge in New Orleans, Louisiana.  Stops along the way included the Hastings Bridge (Hastings Minnesota), the new I-70 Bridge (St. Louis, Missouri), and the Audubon Bridge (New Roads/St. Francisville, Louisiana).  Dan covered some of the technical issues/problems associated with each project and the solutions applied to complete the foundations (or complete the design).  It was a very informative talk presented in a unique way that everyone at the luncheon seemed to enjoy.  Dan’s presentation is now available on our Presentations Page.

 

Posts on Hastings Bridge here.

Posts on I-70 Bridge here.

Posts on Audubon Bridge here.

Posts on the Huey P. Long Bridge here.

 

 

STGEC 2010 - Pile Load Tests in New Orleans - R Thompson 100915Immediately after lunch, Robert made a presentation that described some of the pile load tests performed on two of the storm protection projects in New Orleans that DBA was privileged to be involved with through Kiewit.  By following Dan, it provided a little continuity to the story as Robert took the group below the Huey P. Long Bridge to the levees and canals downstream of New Orleans.  Robert’s presentation can also be found on our Presentations Page.

 

Post on the pile load tests here.

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