Seminar Program* | Day Two | Friday, June 20 | Parallel Sessions 7:30 - 8:00 am 7:30 - 8:30 am 8:30 - 8:45 am 8:45 - 9:15 am Parallel Session 2: Drilled Shafts, Testing and Evaluation, ACIP Piles, Driven Piles | President’s Ballroom B Registration | President’s Ballroom A/B Prefunction n Speakers’ Preparation | President’s Ballroom B Networking Breakfast and Exhibition | President’s Ballroom C/D Introduction | President’s Ballroom B | Mike Yako, P.E., GEI Consultants and Gerald Verbeek, P.E., Allnamics Reliability of Static Capacity Derived from Statnamic Load Testing of Deep Foundations Mike Muchard, P.E., Applied Foundation Testing The Statnamic load test is routinely used as an alternate to conventional static load testing to determine the actual load carrying capacity of the foundation. Statnamic load testing has become a preferred alternative for load testing because of its large loading capability, faster set up and performance, along with lower cost than static testing. Although Statnamic load testing has been employed in various highway projects in the past decade, limited experience and understanding in its use, surprisingly, still exists among many foundation engineers. To provide a better understanding of the performance of Statnamic load testing, this paper demonstrates its reliability through comparison studies between the estimated axial capacity measured from Statnamic and Static Load testing based on several case histories from highway projects. 9:15 - 9:45 am The Cutting Edge of Augercast Piling | Andres Baquerizo, P.E., HJ Foundation Company This presentation will include examples and case histories of augercast piles up to 36-inches in diameter installed to depths in excess of 150 feet. Advancement in equipment and methods to install and test these mega-piles will be discussed, including statnamic methods up to 4,500 tons and double Osterberg cells up to 5,200 tons. Automated Monitoring Equipment will be presented along with new applications for augercast piling for soil freezing and other excavation support solutions. 9:45 - 10:15 am Concerto of Deep Foundations Features – Deep Failure Plane in Coastal Louisiana | J.P. Quackenbos, Jr., Cajun Maritime, LLC From a contractor’s perspective, this presentation will exhibit the geotechnical challenges presented along a primary commerce corridor of the Mississippi River Delta and the methodologies required to accommodate design and constructability of an unconventional cross section. The portfolio of components erected, primarily in the marine environment, included 75’ sheet piles for shore stabilization, 150’+ long one-piece driven piles for concrete decking support, over 20,000 tons of 450lb stone to create an underwater Global Stability Berm, and specialized aggregate as well as high-density foam backfill. 10:15 - 10:45 am Networking Break and Exhibition | President’s Ballroom C/D 10:45 - 11:15 am The Use of the Expander Body with Full Displacement Piles in Medium Dense Sandy Silts | Mario Terceros, Incotec The Expander Body (EB) technology, with several thousand of pieces installed, has been used successfully to increase the pile toe capacity of bored piles in loose to medium dense soil, mainly with by incorporating the possibility of post-grouting of the soil below the expanded pile toe. The combination of the EB with Full Displacement Piles has increased drastically the shaft capacity. This presentation shows the basics of the system and some examples of its use. 11:15 - 11:45 am Field Investigation of Two Ultra-High Performance Concrete Piles | Kam Ng, P.E., University of Wyoming The presentation will describe the design, production, installation and testing of two Ultra-High Performance Concrete (UHPC) piles in Iowa. Detailed pile responses obtained from dynamic and static tests will be compared. The field test results and observations verify that the performance of UHPC piles and facilitates the application of UHPC on production piles. 11:45 am - 12:15 pm Dynamic Load Testing of Drilled Deep Foundations | Samuel Paikowsky, Sc.D, University of Massachusetts Lowell Drop weight systems are increasingly being used to dynamically test the capacity and integrity of drilled deep foundations. The presentation will review drop weight systems, dynamic measurement principles, and construction and testing quality effects via numerical modeling and case histories. A comparison of dynamic and static tests will be presented via a database and case histories. 12:15 - 1:15 pm 1:15 - 1:45 pm Networking Lunch | Riverside Pavilion n Exhibition | Presidential Ballroom C/D Case History: The Use of a Cluster Drill in Install Drilled Shafts for a Secant Pile Wall Adjacent to a Hospital Steve Hinderneder, Schnabel Foundation Company Recent advances in the design and construction of cluster drills have now made the use of percussion drilling equipment close to adjacent structures possible. At the Brigham and Women’s Hospital in Boston, MA, a combination of traditional drilling methods (including casing, augers, core barrels and buckets) and a cluster drill were used to construct drilled shafts for a permanent secant pile wall with minimal vibration levels and no damage to the existing Hospital and no disruption to their operations. Drilling of the secant shafts required drilling through overburden soils into hard rock (Su>10,000psi). 1:45 - 2:15 pm Re-Evaluation of Pile Design and Testing Results for Potential Damage to Open-Ended Pipe Pile Gerald Verbeek, Verbeek Management Services When High Strain Dynamic Tests are performed on piles the emphasis is generally on determining the pile capacity. However, the measurements taken during such a test should be carefully reviewed to ensure that the pile is not damaged during the restrike. This presentation will center on an open pipe pile with a diameter of 1 m and a wall thickness of 12 mm, that was subjected to both a static load test and a dynamic load test, and the results were used to develop the driving criterion for this project. By analyzing the pile design, hammer selection and the driving stresses it can be concluded that pile damage was to be expected, and review of the pile driving analysis data at both the End of Drive and the Beginning of Redrive show that this damage indeed occurred. 2:15 - 2:45 pm Predicting Settlements Due to Impact or Vibratory Pile Driving through the Providence Silts: A Comparison of Numerical Model Results and Measured Results from Available Case Studies P. Graham Cranston, P.E. and Bryan P. Strohman, P.E., Simpson Gumpertz & Heger Inc. In this presentation, the engineers will describe how they applied the method published by Baxter (2005) to model vibratory pile driving and modified the soil demand calculation from Taylor (2011) to model vibratory pile hammer driving in the Providence Silts. Using this procedure, they calculated the settlement profile in the surrounding soil and compared field measurements for several case studies to the predicted analytical results for both impact and vibratory pile driving. 2:45 - 3:15 pm 3:15 - 4:15 pm Networking Break and Exhibition | President’s Ballroom C/D Plenary Panel Discussion | President’s Ballroom A Lessons Learned in Design/Build and Other Contractual Relationships *Program and Speakers are subject to change. DEEP FOUNDATIONS • MAY/JUN 2014 • 7
