Pourya Kargar (Missouri) will co-present a live-streamed discussion titled “Three-Dimensional Stability Analysis of the 2014 Oso, Washington Landslide” at Geo-Institute (G-I) Technical Committees 6th Annual Live Streaming Web Conference at 11:00 a.m. EST. on December 9, 2021.

Pourya Kargar is a Senior Staff Engineer in Geosyntec’s St. Louis, Missouri office and a Ph.D. candidate at Southern Illinois University where he is seeking his second graduate degree in geotechnical engineering. He has significant experience in geotechnical engineering in the industry both as a contractor and consulting engineer. Pourya has developed solutions for the design and construction of tunnels, embankments, excavations, levees, foundations, and other geo-structures in the United States, Iran, Canada, and Mexico. He is also conducting numerical investigations on the cyclic response of soils to develop novel solutions for evaluating triggering and manifestations of liquefaction in sites with susceptible media.

The Geo-Institute Technical Committees’ 6th Annual Live Streaming Web Conference will be held December 6 through 10, 2021 and will include a diverse set of case histories presented by top geotechnical professionals. Each presentation will be two hours long and will include opportunities to interact with presenters. Registrants can earn 1.5 Professional Development Hours (1.5 PDHs) for each event viewed.

The Geo-Institute (G-I) is a membership organization focused on geoprofessionals and the industry. The organization was created by the American Society of Civil Engineers in October 1996 as one of ASCE’s specialty Institutes.

Abstract

This presentation will discuss a three-dimensional analysis of the 2014 Oso Landslide near Seattle, Washington. The topography of the slope prior to this landslide was complex due to the occurrence of several historical landslides on the same slope and three-dimensional (3D) features of the slope. This presentation will describe an inverse 3D limit equilibrium analysis to propose a 3D failure mechanism and sequence for the 2014 Oso Landslide. The 3D mechanism consists of two main phases (Phase I and II) with three retrogressive slides that were identified during field reconnaissance and confirmed via the 3D limit equilibrium slope stability analyses. The 3D analysis includes the complexities of the ancient landslide bench along with surrounding slope geometry and features, which help explain the initiation and direction of slide movement.

More Information

About the Event:6th Annual Web Conference | Geo-Institute (geoinstitute.org)
About Geo-Institute: About Us | Geo-Institute (geoinstitute.org)
For consultation regarding 3D stability analysis, contact Pourya Kargar at PKargar@Geosyntec.com  PKargar@Geosyntec.com
Learn more about Pourya: https://www.linkedin.com/in/pouryakargar