Location

St. Louis, Missouri

Session Start Date

6-1-1993

Abstract

Ground shaking during the Lorna Prieta earthquake of 17 October 1989 caused permanent lateral and vertical displacements of a steep hillside in San Francisco, California. These displacements damaged 36 residences along the top of the hillside. Subsequent exploration and analyses indicated the hillside is composed of loose to medium-dense Dune sand that is marginally stable under static conditions, but highly susceptible to ·movements during ground shaking caused by earthquakes. A retaining system consisting of a combination of drilled soldier piles and permanent tiebacks was designed and constructed to mitigate the potential for future seismically induced slope movement. This paper describes the evaluation of the seismic stability of the slope and the design of the retaining system.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Third Conference

Publisher

University of Missouri--Rolla

Publication Date

6-1-1993

Document Version

Final Version

Rights

© 1993 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Mitigation of Seismically Induced Slope Movement

St. Louis, Missouri

Ground shaking during the Lorna Prieta earthquake of 17 October 1989 caused permanent lateral and vertical displacements of a steep hillside in San Francisco, California. These displacements damaged 36 residences along the top of the hillside. Subsequent exploration and analyses indicated the hillside is composed of loose to medium-dense Dune sand that is marginally stable under static conditions, but highly susceptible to ·movements during ground shaking caused by earthquakes. A retaining system consisting of a combination of drilled soldier piles and permanent tiebacks was designed and constructed to mitigate the potential for future seismically induced slope movement. This paper describes the evaluation of the seismic stability of the slope and the design of the retaining system.