Best of IBC Webinar Series DFI members are presenting an edition of the Engineering Society of Western Pennsylvania’s (ESWP’s) “Best of IBC Webinar Series” on March 21, 2017. This webinar features encore performances of presentations from the DFI Special Foundations Session at the ESWP’s 2016 International Bridge Conference (IBC) in National Harbor, Md. This webinar is an opportunity to view the high-quality technical content presented at the IBC and to earn 1.0 PDH. Two presentations will comprise the foundations session, being held from noon to 1 p.m. on Tuesday, March 21, 2017. • The Virginia Route 340 Bridges: Challenges for Foundations in Karst Terrain and the Importance of Coordination During Design and Construction — James Sheahan, P.E., and Michael Mo, P.E., HDR Engineering and Chaz Weaver, P.E., Virginia DOT This presentation discusses geotechnical investigations at two of the four bridges along State Route 340 in Northwestern Virginia between the cities of Front Royal and Luray. The presentation covers the development of foundation designs and plans, and the installation of micropiles and driven H-piles designed to address the karst-related variable conditions at the bridges. The presentation also discusses the coordination between the geotechnical and structural engineers and the interaction with the Viriginia DOT staff that was necessary during design and construction. See feature article on p. 85. • Lateral Resistance of Abutment Piles Near MSE Walls — Kyle Rollins, Ph.D., Brigham Young University Pile foundations for bridges must often resist lateral loads produced by earthquakes and thermal expansion or contraction. In addition, space constraints also lead to vertical mechanically stabilized earth (MSE) walls at abutment faces. Available test results indicate that lateral pile resistance can decrease significantly as piles are placed closer to MSE walls. However, no design procedure is available for assessing the decrease in resistance or predicting the force induced in the reinforcement. This presentation describes the study conducted to address this design need. The webinar is FREE, but all attendees must register and space is limited. Registration information for the webinar and the proceed- ings from the 2016 IBC conference are available at www.eswp.com. The ESWP-DFI partnership is aimed at enhancing the exposure and networking of geotechnical and foundation companies with structural and bridge engineers and owners who annually attend the IBC. For the 2017 Conference, being held at the Gaylord National Resort and Convention Center in National Harbor, Md., DFI will again organize a dedicated deep foundations area for companies with products and services related to foundations and will sponsor another technical session on deep foundations. DFI members inter- ested in participating are encouraged to contact Mary Ellen Bruce Large, P.E., D.GE, DFI technical activities manager, at [email protected]. DEEP FOUNDATIONS • JAN/FEB 2017 • 39
