Dan Brown and Associates, LLC

Specialists in Deep Foundation Design, Construction, and Testing and Slope Stability Problems

March 31st, 2008

New Geotechnical Special Publication honoring Dr. John Schmertmann

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The American Society of Civil Engineers has just published Geotechnical Special Publication (GSP) No. 180: From Research to Practice in Geotechnical Engineering. This book includes 16 papers from the career of Dr. Schmertmann and 28 invited papers on various topics.

From Research to Practice in Geotechnical Engineering, GSP 180, honors Dr. John H. Schmertmann, Professor Emeritus and P.E., for his contributions to civil engineering. It begins with his biography, a list of his students and writings, followed by reprints of his selection of 16 representative papers from his career. Twenty-eight new, mostly invited papers follow on a great variety of subjects, including: the installation and testing of piles; pile-structure interaction; liquefaction and its mitigation; case histories of settlement and landslide mitigation and capping a superfund landfill; and computer modeling. The authors include six members of the National Academy of Engineering. This GSP concludes with a paper by one of these, Dr. Schmertmann, which itself concludes with a suggestion for improving your technical writing. Everyone working in the geotechnical profession will find something interesting and useful herein.

The book is available from the ASCE Bookstore (click the image above).


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March 17th, 2008

International Foundation Congress and Equipment Expo ‘09

Mark you calendars now for a really big geotechnical engineering and foundation construction “mega-event” next year - The International Foundation Congress & Equipment Expo ‘09. The Geo-Institute of ASCE, the ADSC, and the PDCA are the lead organizations for the event. Many other organizations are also Cooperating Organizations.

The International Foundations Congress and Equipment Expo ‘09 (IFCEE09) will provide a spectacular and comprehensive Congress. It combines the International Association of Foundation Drilling (ADSC), the Geo-Institute of ASCE, and the Pile Driving Contractors Association (PDCA) 2009 annual meetings, and will bring together varied USA and worldwide industry organizations.

As part of the technical program, engineers, foundation contractors, equipment manufacturers, suppliers of tools and services, and researchers will discuss the latest technological advances in the foundation and earth retention industry. The extensive outdoor large equipment exposition and indoor displays provide attendees an opportunity to examine the tools of foundation construction, and are an additional incentive for constructors and engineers to attend this mega-event. This expanded program builds on the highly successful 2004 Geo-Support conference and equipment exposition held in Orlando, FL.

The conference will be at the Buena Vista Palace Resort and Spa adjacent to Downtown Disney at Walt Disney World, Florida. In addition to a full program of keynote speakers, technical paperas, case histories, and panel discussions, the largest equipment exposition devoted to the foundation industry will also be held.

Information on the Call for Papers is here. Abstracts are due April 30, 2008.

Information on exhibits and sponsorships is here.

We will have a link to the conference website at the top of our right side bar until the conference date.


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March 17th, 2008

Conferences, seminars, and other useful links

Make sure and check the links on our left side bar for information on upcoming conferences, meetings, and seminars. We try to list all of the major events of organizations like the Geo-Institute of ASCE, the ADSC, the PDCA, and the DFI.

Also, check out the changes in geotechnical engineering related to transportation projects coming out in Arizona at Geoprac.net. From Randy’s post:

There are some significant changes being made to the state of the practice in geotechnical engineering in Arizona. NCS Consultants, LLC has prepared three policy memoranda for the Arizona Department of Transportation or ADOT that have been issued to consultants all over the State. These memos are on the topics of bearing capacity and settlement of spread footings and retaining walls, the design of drilled shaft foundations in gravelly soils, and the preparation of drilled shaft axial capacity charts for use by bridge engineers.

Randy does a good job of scouring the web for geotechnical related items. A link to his site is on our left sid bar and we have a feed to his posts on the right side bar.

While I am on the topic of resources, we also have a link to Geoengineer.org, another resource website for the geotechnical engineering community. A link to the site is on the left side bar, and links to their latest newsletters are on the right side bar.


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February 20th, 2008

In Memoriam: Dr. Ralph B. Peck (1912-2008)

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A great man and geotechnical engineer has passed. Dr. Ralph Peck died February 18th. His obituary:

Ralph B. Peck, Professor Emeritus of Foundation Engineering at the University of Illinois at Urbana-Champaign died of congestive heart failure on February 18, 2008, at his home in Albuquerque, New Mexico. He was born in Winnipeg, Canada, to his American parents, Orwin K and Ethel Huyck Peck on June 23, 1912.

Ralph Peck earned a Civil Engineering Degree in 1934 and Doctor of Civil Engineering Degree in 1937, both from Rensselaer Polytechnic Institute in Troy, New York. In 1938-39 he attended the Soil Mechanics course at Harvard University and was a laboratory assistant to Arthur Casagrande. From 1939 to 1942 Peck was an assistant subway engineer for the City of Chicago, representing Karl Terzaghi who was a consultant on the Chicago Subway Project. He joined the University of Illinois in 1942, and was a Professor of Foundation Engineering from 1948 to 1974. Since 1974, Professor Peck was a Professor Emeritus at the University of Illinois, and a consultant in geotechnical engineering.

In 1948, together with Karl Terzaghi, Ralph Peck co-authored the most influential text book in geotechnical engineering, Soil Mechanics in Engineering Practice. In 1953 with Walt Hanson and Tom Thornburn, Ralph Peck co-authored the widely used text book Foundation Engineering.

In 1942, Dr. Peck joined the Civil Engineering Department of the University of Illinois, where he remained as a teacher and mentor until his retirement as Professor Emeritus in 1974. After moving to Albuquerque, Dr. Peck continued his active consulting practice which included jobs in forty-four states in the USA and twenty-eight countries on five continents. His more than one thousand consulting projects include: the rapid transit systems in Chicago, San Francisco, and Washington; the Alaskan Pipeline System; the James Bay Project in Quebec; and the Dead Sea dikes. He authored over 250 technical publications, and served as the President of the International Society of Soil Mechanics and Foundation Engineering from 1969 to 1973. In 1974, he was awarded the National Medal of Science by President Ford. A few of his many honors include the Norman Medal, The Wellington Prize, and the Outstanding Lifetime Achievement Award in Education from the American Society of Engineers. His last project was the Rion-Antirion Bridge in Greece. It received the ASCE’s OPAL Outstanding Civil Engineering Award for 2005, and is the only project outside the United States to be so honored.

Ralph Peck married Marjorie E. Truby on June 14, 1937. He is survived by his daughter and son-in-law, Nancy Peck (Allen) Young, and son and daughter-in-law, James (Laurie) Peck, and grandchildren, Michael Young and Maia Peck.

In lieu of flowers, contributions can be made to: Ralph B. Peck Geotechnical Engineering Fund Univ. of Illinois Foundation 1305 West Green Street, MC-386 Urbana, Illinois, 61801.

A publication on his life and works by the Norwegian Geotechnical Institute is here.

The recently published book on Dr. Peck, Ralph B. Peck - Educator and Engineer - The Essence of the Man, by John Dunnicliff and Nancy Peck young, can be found at the ASCE Bookstore.


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January 22nd, 2008

Welcome to newest DBA team member, Paul Axtell!

DBA is proud to announce the newest addition to the team - Paul J. Axtell, P.E.! Paul comes to us from the U.S. Army Corps of Engineers Kansas City District office. He received his B.S. in Civil Engineering from the University of Missouri-Columbia and his M.S in Civil Engineering from the University of Texas. Paul’s geotechnical engineering experience includes slope analysis, ground improvement, dam engineering ,and deep foundations. One of Paul’s first projects will be the kcICON project in Kansas City. Paul’s resume is now available on the About Us page of our site.

Welcome aboard, Paul!

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January 21st, 2008

Slope Stabilization Method with Micropiles - A report for the ADSC/DFI Joint Micropile Committee

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.


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January 21st, 2008

JJA Bridge in ENR.com article

An article entitled “Historic Cable-Stayed Link Taking Shape in Louisiana” about the construction of the John James Audubon (JJA) Bridge in Louisiana is on ENR.com here. The drilled shafts actually extend much deeper than indicated in the article, for what its worth. I think they were only talking about the permanent casing, not the entire drilled shaft.


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December 6th, 2007

Lateral load tests of drilled shafts behind an MSE wall - research with KDOT and KU

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DBA is part of a research project involving laterally loaded drilled shafts and MSE walls with the Kansas Department of Transportation (KDOT) and the University of Kansas. The ultimate goal of the study is to develop rational design procedures for situations where drilled shafts are constructed near or adjacent to MSE walls. From the study proposal:


Drilled shafts used to support sound walls and other structures are often constructed near the facing of mechanically stabilized earth walls (MSE walls) due to right-of-way constraints or other limitations. Suppliers and designers have expressed concern that lateral loads from the shafts may be transferred to the wall facing, causing excessive deformation. Procedures currently available to design MSE walls to resist internal lateral loads are very conservative isolating the shafts from the backfill or the using extremely large shafts to minimize deflection have been adopted. These designs are very expensive and in some cases lead to other problems. Results from this research project are expected to lead to much more cost effective designs on subsequent KDOT projects. We expect that the results will lead to improved national design standards for this type of construction as well.

Seven test shafts and 6 reaction shafts were constructed at the tests site, with some of the shafts socketed into the underlying limestone and shale bedrock. All of the test shafts were located within the reinforced backfill zone of the wall, varying the distance between the shaft and the wall face. Single shafts and shaft groups were loaded laterally. The wall face, reinforcing geogrid materials, and backfill were instrumented to measure loads, strains, and movements. The shafts were built with inclinometer casings to allow measurement of shaft deflections using an inclinometer during the tests. Many of the materials and construction work for the wall and shafts were made as in-kind donations by various companies, including Tensar who supplied the geogrid. KDOT Maintenance personnel perfomed most of the construction work and provided support for the load tests.

The tests took place between November 5th and 16th. I was on site the 12th through 16th to observe the tests, provide oversight, and assist Chris Kohlhof of AFT with running the tests. You can see a photo album or slideshow of some photos from my time at the site by clicking below.

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Dr. Bob Parsons, P.E. of the University of Kansas Department of Civil, Environmental and Architectual Engineering will concentrate on analyzing the data concenring the wall and the backfill. DBA will analyze the lateral load tests data to derive p-y relationships for shaft design and will prepare a report on the load tests that includes design recommendations.


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November 30th, 2007

Updated - GEC No. 8: Design and Construction of Continuous Flight Auger Piles - It’s Finally Here!

11/30-07 Update! - GEC No. 8 is now up on the FHWA web site. You can download it here.

Yes, folks, GEC 8 is finally complete! The publication version of Geotechnical Engineering Circular No.8: Design and Construction of Continuous Flight Auger Piles will soon be available from the FHWA Geotechnical Web Site. If you want an official sneak peek at GEC 8, just click here to get the PDF (approx. 10 MB). This circular is part of FHWA’s efforts to implement the use of CFA piles as a viable foundation alternative for transportation structures. We’ll post a notice when GEC 8 is on the FHWA web site.

November 27th, 2007

DBA on winning team for landmark bridge in Kansas City, MO!

DBA is part of the winning team for the kcICON project in Kansas City, Missouri. The $245 million project includes a new landmark bridge over the Missouri River. The winning joint venture is Passeo Corridor Constructors consisting of Massman Construction Company, Clarkson Construction Company, and Kiewit Construction. Parsons Transportation Group and Transystems are the major design firms working for the joint venture. DBA will be the geotechncial engineer for the river bridge while Terracon will provide geotechnical services for the remainder of the project.

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The kcICON project area covers about four miles of I-29/35 in Kansas City. The project features a landmark cable-stay Missouri River bridge and will upgrade Interstate 29/35 to six lanes (expandable to eight lanes) from north of the Route 210/Armour Road interchange to Independence Ave. Construction will begin in Spring 2008. Full service to all lanes will be restored by June 1, 2011 and final construction completed by July 31, 2011.

The cable-stayed bridge will be approximately 1700 feet long, with the two cable-stayed spans supported by a single pylon. The main channel span will be 550 feet and the back span will be about 450 feet. Approach spans will vary from 110 to 165 feet. Drilled shafts will be utilized to support the bridge, with 11-foot diameter shafts planned for the main pylon. The shafts will be socketed in to shale bedrock.

The complete news release announcing the project award is here.

An ENR story is here.

The kcICON project website is here.

A link to the project website will be added to our project links area on the left side bar. We’ll be posting updates as things get moving next year.

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