Steve will be one of the presenters at the PDCA Professor’s Driven Pile Institute June 18th through 22nd at Utah State University. Steve’s lecture will be comparing the capacity of driven piles to cast-in-situ piles. He will also be assisting with the axial and lateral load test demonstrations. For more information or to contribute to the funding of the Institute, click here.
The PDCA is holding the Professors’ Driven Pile Institute in Logan, Utah on June 18-22, 2007. This institute will provide information on design and construction of driven pile foundations for 25 professors that teach deep foundations courses at universities in the U.S. For more information on supporting this institute, click here to go to the PDCA website.
The week of August 28th saw five load tests performed at the project site. A lateral Statnamic test and an axial Statnamic test were performed on both 24-inch and 30-inch piles. The tests were performed by AFT. A picture of one of the axial test setup is below. A static axial load tests was also performed on a 24-inch pile. Eustis Engineering, the project geotechnical engineering firm, supervised the static test. The results of the tests, along with the PDA data gathered by Eustis during driving of the indicator piles, will be used to set the pile tip elevations along the bridge alignment. Driving of production piles is set to begin the week of September 11th.
I made a visit to the US 90 Biloxi to Ocean Springs bridge site on Thursday and was able to observe the driving of one of the indicator piles. This is a 30-inch precast prestressed concrete pile that will also be used for a Statnamic lateral load test. The axial and lateral load tests will begin later this month, with production piles planned to start in mid-September.
The left photo shows the barge set up for driving. This pile was adjacent to the bascule span of the destroyed bridge. The middle and right photos are during pile driving. A air hammer is being used to drive the pile.
Dan will be presenting â€œPile Set Up in Foundation Designâ€ on Friday the 3rd. Danâ€™s presentation will provide an overview of the fundamental mechanisms affecting the time-dependency of axial resistance in driven piles, and the effect of this phenomenon on design, quality control, and testing of driven pile foundations. Examples from the ongoing Escambia Bay Bridge project will be described, in which setup has been seen to vary considerably based on soil conditions. Dan will also be a panelist in a roundtable discussion â€œComparing Driven Pile Capacities With Drilled Shaft Capacitiesâ€ to be held later that afternoon.
On Saturday the 4th, Steve will present â€œStatic and Axial Capacity Between Drilled and Driven Pilesâ€. Steveâ€™s presentation will provide an overview of the effect of construction on deep foundation behavior and factors that affect performance. Issues of construction quality assurance and control, along with advantages and limitations of each foundation type will also be discussed.
Specialists in Deep Foundation Design, Construction, and Testing and Slope Stability Problems