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Geotechnical Lecture Series

Geotechnical Aspects of the Burnside Bridge Retrofit Study

Wednesday, May 17, 2017 4:30 PM - 5:30 PM

Presented by James Walters, P.E. and Stephen McLandrich, P.E., of Shannon & Wilson, Inc., Portland, Ore.

ABSTRACT: The Burnside Bridge connects downtown Portland with the central eastside business district of the city. It was opened in 1926 and was recently added to the National Register of Historic Places. Multnomah County recently conducted a review of the condition of their critical transportation infrastructure and concluded that the Burnside Bridge was a top priority due to its designation as the only Priority 1 lifeline route across the Willamette River. Our team has performed a detailed review of the original foundations and subsurface conditions to support a feasibility study to identify potential bridge seismic retrofit, rehabilitation, and replacement alternatives. One particular geo-challenge is the presence of liquefiable soils and the potential for lateral spreading along the eastern bank of the Willamette River. We have performed finite difference modeling using Flac and explored conceptual mitigation techniques that can be used for the seismic upgrade of this bridge.

BIOGRAPHY: James Walters is a Senior Engineer at Shannon & Wilson in Portland, Ore. He completed his bachelor’s and master’s degree at the Oregon State University where he researched very tall MSE walls. James has been involved in the design and construction of a variety of infrastructure across the northwest region including highway and pedestrian bridges, railroad structures, urban mass transit facilities, water and wastewater treatment plants, electrical transmission structures, and flood protection systems. Specifically, James specializes in drilled shaft construction, dynamic pile load testing, retaining wall design, levee design and construction, and design of pavement structures. Stephen McLandrich is an Associate Geotechnical Engineer who has recently joined Shannon & Wilson’s Portland, Ore. office. Prior to Shannon & Wilson, he worked 10 years for Arup, a multi-disciplinary engineering firm, in their San Francisco office. With Arup, Stephen led the geotechnical engineering for the Transbay Transit Center, the nation’s largest urban excavation during its construction. Stephen also led geotechnical engineering for three of San Francisco’s newest high-rise towers the Salesforce Tower, 181 Fremont, and Park Tower. Rising 1,070 feet, the Salesforce Tower measures just 30 feet shy of being the tallest building west of the Mississippi. Stephen holds masters degrees from the University of California, Berkeley and the University of Cambridge and a bachelors degree from the University of Michigan, Ann Arbor. 

 


Kearney Hall (campus map)
212
Sch of Civil/Constr Engr
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