Category Archives: Bridge Foundations

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. 

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Dr. Steve Dapp…in Taiwan!

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.

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(Source: ISSMGE Bulletin Volume 5, No. 4, p82)

Audubon Bridge–Cofferdam Construction Article

LA-Civil-Eng-JJABridge

As noted earlier on this blog, the Audubon Bridge opened a little bit earlier than planned.  Although over a year old, an article recently came to my attention that puts a spotlight on the unique engineering and construction that went into the cofferdams for the two main bridge piers in the Mississippi River.  The article is “John James Audubon Bridge Project – Cofferdam Construction for the Main Span Pier Foundations”, published in the February 2010 issue of Louisiana Civil Engineer, the Journal of the Louisiana Section of the American Society of Civil Engineers.

The article’s lead author, Sereno Brown, P.E., was the construction team’s Project Engineer for the design-build project.  In the article, Mr. Brown outlines the issues that led to the team selecting a pre-cast concrete cofferdam over other methods, the design methodology, and then the construction of the cofferdam.  The effort posed several significant design and construction challenges, including the sequence of lowering the cofferdam into place through a set of hydraulic jacks. The entire process was truly an amazing engineering and construction feat.

Download the article here.