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 1: Driven Piles, Micropiles, Seismic and Lateral Loads, Marine Foundations | President’s Ballroom A Registration | President’s Ballroom A/B Prefunction n Speakers’ Preparation | President’s Ballroom A Networking Breakfast and Exhibition | President’s Ballroom C/D Introduction | President’s Ballroom A | John Roma, P.E., Underpinning and Foundations Skanska and Anna Sellountou, P.E., GRL Engineers Embracing Technology and Innovation Opportunities in Deep Foundation Design and Construction Brad Aldinger and Jean-Louis Locsin, Haley & Aldrich Higher loads, challenging soil and scour conditions, compressed schedules, material availability, reduced costs and an increase in the use of design-build delivery contracts are only a few of several factors influencing the need for speed, innovation, and flexibility in designing and constructing deep foundations for large bridge infrastructure projects. A summary of these innovations and flexible solutions on several projects spanning the past 10 years will be presented. 9:15 - 9:45 am University of Minnesota Northrop Auditorium Renovation Underpinning and Micropile Foundation Case Study Greg Greenlee, P.E., Engineering Partners Northrop Auditorium is a historic building on the University of Minnesota campus built in 1929 which is currently being renovated to create a world class performance facility. As part of this renovation much of the original interior structure was removed and replaced, or augmented, while none of the exterior building walls were removed or modified to maintain the historic look of the building. This presentation will discuss how a multi-phased underpinning and micropile foundations construction sequence was used to accomplish the design objectives within the confines of the building envelope. 9:45 - 10:15 am Design of Piles in Liquefied Soils: Consideration of Down-Drag Forces | Arash Khosravifar, Ph.D., P.E., Fugro Consultants Inc. This presentation illustrates the application of the load-deformation based approach to evaluate a pier structure supported on piles passing through potentially liquefiable soils in an area of high seismic hazard. Volumetric strains were estimated from empirical equations combined with detailed 2D effective-stress site response analyses using the UBCSAND model in FLAC. The free-field soil settlements were then applied using pseudo-static analyses. This approach is compatible with performance-based design principles emphasizing allowable deformations rather than force-based methods. 10:15 - 10:45 am Networking Break and Exhibition | President’s Ballroom C/D 10:45 - 11:15 am Ductile Iron Piles in New England | Rima Veitas, P.E., Veitas and Veitas Engineers Ductile Iron Piles (DIPs) are a proven, viable alternative to conventional piles, and for the past five years have been used successfully throughout New England. The installation process of DIPs lends itself to both large and small projects. Because of their installation efficiency they provide a substantial cost savings over drilled micropiles. Several New England projects (both end bearing and friction) will be evaluated, focusing on the installation and design procedures. 11:15 - 11:45 am Above-Water Pile Driving by the Press-In Piling Method | Takefumi Takuma, Giken America Corporation The Press-in Piling Method offers numerous advantages over conventional pile driving methods. It is also the case with pile driving on water. The author will review three recent above-water tubular pile driving projects that utilized the method where rock layer and existing ripraps had to be driven through. 11:45 am - 12:15 pm Grouted Micropiles for Memorial Bridge Piers Rehabilitation Nabil Hourani, P.E., M.ASCE and Gerti Kola, P.E., M.ASCE, HNTB Corporation The Memorial Bridge connecting New Hampshire and Maine was first opened in 1923. Beginning in 2012, the bridge was replaced and the existing piers were rehabilitated using rock socketed drilled and grouted micropiles. The micropiles were designed to accommodate increased loads due to seismic and barge impacts. Micropile construction and quality procedures will be highlighted in this presentation. 12:15 - 1:15 pm 1:15 - 1:45 pm Networking Lunch | Riverside Pavilion n Exhibition | Presidential Ballroom C/D Key Challenges and Industry Solutions for Offshore Wind Turbine Foundations Paul Doherty, Ph.D., BE, MIEI, University College Dublin This presentation will explore the extents of the monopile design boundary to determine the upper limit for deployment and whether large diameter XL monopiles can be extended into increasing water depths. The relative advantages and disadvantages of a number of different foundation concepts (e.g., suction caissons, and initially buoyant gravity bases) and key risks and challenges associated with their design will be discussed. Particular attention will be given to the potential of each concept to reduce capital expenditures of offshore wind farm development. 1:45 - 2:15 pm A Study Case of High Capacity Micropile in Rock for a Bridge Foundation Summary Carlos Pimentel de Luna, P.E., M.ASCE, Geotechnical Consultants, Inc. This paper shows a high capacity micropile case where an instrumented load test was performed. Data from the verification load test show that a big part of the micropile total capacity was derived from both rock-socket end-bearing and outer-casing tip resistance. These results would indicate that micropiles with short embedment hard-rock sockets are more controlled by the structural capacity of the element itself. 2:15 - 2:45 pm Installation of Large Diameter Piles | KS Govindarajan, L&T GeoStructure Space restrictions on urban projects in India require new structures to be constructed with high concentrated superstructure loads and limited plan areas. Large diameter piles address these foundation requirements. The Chennai metro project involves a high superstructure load of approximately 25000 kN with a limited footprint area, and 2.5-m diameter piles were used as a plunge column foundation to replace the original barrette design. This presentation describes the details of the project and the pile installation methods. 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 6 • DEEP FOUNDATIONS • MAY/JUN 2014 For complete presentation descriptions, visit: www.dfi-superpile.org
