August 2019 ASCE Virginia Geo-Institute Meeting

Join the ASCE Geo-Institute Virginia Chapter for an evening of networking, professional education, fine dining, election of officers and updates on the upcoming Geo-Virginia Conference.

ONLY 24 spots available.

REGISTER HERE

ASCE Geo-Institute Meeting 2019 08 15 - 75 dpi Resampled

TECHNICAL PRESENTATION TOPIC – LRFD FOR MICROPILES (1 PDH)
Speaker: Jonathan Bennett, PE, D.GE

Load and Resistance Factor Design (LRFD) is the predominant design method utilized today for reinforced concrete and structural steel, and is the primary focus of the AASHTO LRFD Bridge Design Specifications. Historically, micropile design has been performed mainly with Allowable Stress Design (ASD) methodologies, and most of the micropile design manuals and specifications in existence prior to 2008 were based on ASD.

In light of this history of ASD design methodologies, and in spite of the widespread use of LRFD in general structural design disciplines, there have been a number of questions and a great deal of confusion regarding the proper use and implementation of LRFD design methodologies for micropiles. The author, as part of a DFI / ADSC Joint Micropile Committee initiative, developed a presentation in response to these questions and issues which covers the fundamentals of LRFD as it applies to micropiles, and provides an illuminating comparison with ASD methodology.

This paper is a formalized and updated snapshot of the current State of Practice of LRFD for Micropile Design based on the most current information and design codes relevant to micropiles. It will describe the fundamentals of Load and Resistance Factor Design (LRFD), demonstrate micropile design and testing utilizing LRFD, compare the results with historical ASD design, point out the limitations of current LRFD practice relative to micropiles, and finally map out the path forward with regard to proper implementation of LRFD as a true reliability based design methodology for the design of micropiles.

2018 Engineering and Construction Exchange

Join me next Thursday in Charleston, WV for the 2018 Terracon Engineering and Construction Exchange. I will be presenting on Micropiles at the event so make sure you register below and get the latest and greatest on Micropiles! Presentation attendees will receive a PDH certificate for continuing education credit. There is no cost for registration so all the better! See you then. #micropiles #geotechnicalengineering #construction
2018 Engineering and Construction Exchange Booklet FINAL_Page_3

Are Ductile Iron Pipe Piles Micropiles?

I saw a post recently where a company was advertising Ductile Iron Pipe Piles as “Micropiles”. I don’t consider ductile iron piles to be micropiles for the simple reason that they don’t fit the definition of a micropile. If you look back to our post on micropile definitions, you will see that micropiles are drilled and grouted “replacement piles”. Ductile iron piles are not replacement piles. They are driven, grouted “displacement” piles.

A friend of mine from north of the border told me once that “the Americans get all bent out of shape when somebody calls a helical pile (or ductile iron pile) a micropile.” Does it matter? I think it does. You would probably look at me funny if I called a car a truck. But thats just me.

Anyway, don’t get me wrong, I love ductile iron piles. I just don’t consider them micropiles. If you need to get into rock, you wont be able to do it with a ductile iron pile but you can with a good old Micropile. They are great in soil though…

DFI Committee Project Fund

The Deep Foundations Institute (DFI) will be soliciting Committee Projects Fund proposals again this year with a slightly modified requirement set. The Committee Project Fund will provide financial support for DFI Technical Committee projects that advance the state of practice and understanding of deep foundations and produce a usable deliverable. All proposals MUST be submitted through a DFI Technical Committee.

If you have any ideas for Micropile Committee related projects that you would like to prepapre a proposal for, please contact me to discuss.

Information on this year’s Project Fund will be forthcoming soon but proposals will be due in December 2012 so it is very beneficial to get started early if interested.

Small Diameter Geo-Support Design and Construction Seminar

Registration is now open for the ADSC / DFI Small Diameter Geo-Support Design and Construction Seminar!

The Small Diameter Geo-Support Design and Construction Seminar is a two-day event that will cover aspects of both anchored earth retention and micropile foundation support from a perspective of design, construction, and case history coverage. The seminar will feature presentations from leading North American and worldwide experts on the design and construction of small diameter geo-support systems. This practice-oriented seminar will be valuable to owners, engineers, architects, general contractors, and others in terms of understanding the fundamentals, applications, design, and construction of small diameter ground anchors and micropiles for earth retention and foundation support applications. There will be opportunities for networking and individual discussion with the panelists and presenters throughout this two-day event.

Sign up today at the link below!

https://www.eiseverywhere.com/ehome/index.php?eventid=48477&

More information will be posted as it becomes available.

DFI / ADSC Joint Micropile Committee Meeting – October 16, 2012

The next DFI / ADSC Joint Micropile Committee meeting will take place at the DFI 37th Annual Conference on Deep Foundations in Houston, TX on Tuesday, October 16th from 8PM to 10PM. All committee members are encouraged to attend. The venue location is below:

The George R. Brown Convention Center
1001 Avenida de las Americas Houston
Houston, TX 77010
1-713-853-8000

To see a copy of the latest Chairman’s report for the Joint Committee, click HERE.

More information on the 37th Annual Conference on Deep Foundations can be found HERE. See you in Houston!

DFI / ADSC Joint Micropile Committee Meeting – August 2, 2012

The next DFI / ADSC Joint Micropile Committee meeting will take place at the ADSC Summer Meeting in San Francisco, CA on Thursday, August 2nd from 8AM to 10AM. All committee members are encouraged to attend. The venue location is below:

The Fairmont San Francisco
950 Mason Street
San Francisco, CA
(415) 772-5000

To see a copy of the latest Chairman’s report for the Joint Committee, click HERE.

More information on the ADSC Summer Meeting can be found HERE. See you in San Francisco!