First Advisor

Diane Moug

Term of Graduation

Fall 2020

Date of Publication


Document Type


Degree Name

Master of Science (M.S.) in Civil & Environmental Engineering


Civil and Environmental Engineering




Soil liquefaction -- Pacific Northwest, Soil mechanics -- Pacific Northwest, Plasticity, Geotechnical engineering



Physical Description

1 online resource (vi, 60 pages)


Strong earthquake shaking is a natural hazard threat in the Pacific Northwest. Soil failure due to strong earthquake shaking -- known as cyclic soil failure or liquefaction -- is expected to cause large ground deformations and damage to roads, bridges, and other civil infrastructure. Cyclic soil strength (CRR) is often characterized with in-situ geotechnical tests including the cone penetration test (CPT). Relationships between CRR and in-situ test data are not well established for soils in the Pacific Northwest. Portland State University, in partnership with New Albion Geotechnical has compiled a database of cyclic lab tests for Pacific Northwest soils to characterize the behavior of these soils during a seismic event. This research presents investigation into relationships between CPT data and laboratory measurements of CRR. Preliminary findings suggest that relationships exist based on soil behavior type and plasticity indices. This research provides a basis to guide geotechnical engineering and geotechnical earthquake hazard characterization.


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Persistent Identifier

project site data source summary.pdf (599 kB)
project site data source summary

summary in-situ parameters.pdf (444 kB)
summary in-situ parameters