THIS EVENT HAS BEEN CANCELLED
Central Chapter Dinner Meeting:
Joint GeoInstitute & SEAoA Meeting- Developing Foundation Design Guidelines for the Electric Power Industry
There are presently no comprehensive guidelines on foundation design for electrical system and power delivery structures. Various electric power industry codes exist for defining structure loads; however, there is a lack of guidance on load cases for foundation design, extreme loading conditions and overall chain of failure of the system. The state of the practice is to use target reliability indexes that minimize risk; however, there is variability in indexes used for each structure type. Current practice is to use performance parameters at various loading states, but many of these parameters are not consistent with the load-deformation responses observed in the foundations. The lack of a consistent analysis and design methodology has resulted in foundation designs that vary significantly from utility to utility. In recognizing this deficiency, industry professionals formed the Electric Power Systems Foundation Working Group, now a committee, under the auspices of the Deep Foundations Institute in 2012. In 2019, the ASCE authorized establishment of the Design of Overhead Line and Substation Foundation Subcommittee of the Electric Transmission Structures Committee. This presentation will provide a synopsis of the national working groups findings and directions forward.
Presented by Peter M. Kandaris, P.E. and Ashley Shirer, PhD, P.E.
Peter M. Kandaris, P.E. is DiGioia Gray’s Senior Consultant and Western Region manager and has led geotechnical engineering investigation and foundation design efforts for 37 years for major electric system projects from California to Pennsylvania. Work includes the design of thousands of drilled shaft foundations for hundreds of miles of electric transmission lines incorporating state of the practice reliability-based investigation and foundation design methods. He has published numerous papers and reports detailing research findings on the high voltage transmission line foundation tests by EPRI, direct embedment pole backfill studies, transmission line foundation upgrade methodology for EPRI, and various foundation and structure studies for CEATI. He is the current Deep Foundations Institute’s co‐chairman of the Electric Power System Foundation Design Committee, member of the new ASCE Manual of Practice Committee for Transmission Line and Substation Foundations and chair for the Vibratory Caisson working group, and a past chairman of the Arizona Section of the GeoInstitute. Mr. Kandaris obtained his Bachelor’s and Master’s degrees in Civil Engineering from Arizona State University and is a Registered Professional Engineer in the states of New Mexico, Arizona, Illinois, Nevada and Iowa.
Ashley Shirer, PhD, P.E. has worked for DiGioia Gray for 6 years. She has over ten years’ experience designing foundations and evaluating subsurface conditions. Her experience includes soil isotope analysis, micromorphology, geophysical survey and traditional subsurface sampling. Additionally, her research experience includes ancient earthwork construction, forensic geotechnical analysis, and more recently, foundation design for the power delivery market. She is a technical expert and instructor for the Foundation Analysis and Design software, FAD Tools. Dr. Shirer holds a Bachelor’s degree in both Anthropology and Civil Engineering from North Carolina State University, a Master’s degree in Archeology from Arizona State University, and a Doctorate in Civil Engineering from Arizona State University from the School of Sustainable Engineering and the Built Environment. Her dissertation focused on developing a correlation between pressuremeter modulus and geophysical velocity measurements for the design of laterally loaded deep foundations. She is a Registered Professional Engineer in Arizona.
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