Seismic stability analysis of landslides stabilized with expanded polystyrene (EPS)-block geofoam

The goal of the proposed research is to develop a comprehensive seismic analysis procedure for the use of expanded polystyrene (EPS) -- block geofoam in landslide stabilization and repair.;Landslides are among the most widespread geologic hazard on earth. Landslides occur in every state and U.S. territory, especially in the Pacific Coast, the Rocky Mountains, the Appalachian Mountains, and Puerto Rico. Active seismic activity contributes to the landslide hazard risk in areas such as Alaska, Hawaii, and the Pacific Coast and estimated damages related to landslides exceed ;A current need in practice is the availability of a comprehensive seismic design procedure that is specific to EPS blocks utilized for the function of lightweight fill in slope stabilization and repair.;To accomplish the overall research goal, the following research objectives were pursued: (1) develop a method to evaluate the seismic stability of EPS embankments based on limit equilibrium methods of analysis, (2) develop a method to evaluate the seismic stability of EPS embankments based on stress-strain (deformation analysis) and (3) develop a seismic stability analysis procedure that incorporates the findings of Objectives 1 and 2.