Location

San Diego, California

Session Start Date

3-26-2001

Session End Date

3-31-2001

Abstract

Pore pressure generation, and post-liquefaction dissipation and densification characteristics are data essential for detailed analysis of performance of sites containing liquefiable sands during and after earthquakes. These characteristics are also necessary for the design, analysis and choice of appropriate ground modification systems to mitigate liquefaction-induced hazards. Past research has addressed such material characteristics for clean sands. However, there are many sites that comprise non-plastic silts or silty sands have experienced liquefaction-induced damage. This paper presents results from an experimental study on silts and silty sands. Pore pressure generation characteristics are evaluated and compared with that of sands. Pre- and post-liquefaction compressibility and coefficient of consolidation, and densification characteristics are determined from undrained cyclic tests data followed by dissipation. Implications of these findings on the earthquake performance of sites containing non-plastic silts and silty sands are discussed. Their impacts on the choice of ground improvement techniques are also discussed.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Meeting Name

Fourth Conference

Publisher

University of Missouri--Rolla

Publication Date

3-26-2001

Document Version

Final Version

Rights

© 2001 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

Share

COinS
 
Mar 26th, 12:00 AM Mar 31st, 12:00 AM

Post-Liquefaction Pore Pressure Dissipation and Densification in Silty Soils

San Diego, California

Pore pressure generation, and post-liquefaction dissipation and densification characteristics are data essential for detailed analysis of performance of sites containing liquefiable sands during and after earthquakes. These characteristics are also necessary for the design, analysis and choice of appropriate ground modification systems to mitigate liquefaction-induced hazards. Past research has addressed such material characteristics for clean sands. However, there are many sites that comprise non-plastic silts or silty sands have experienced liquefaction-induced damage. This paper presents results from an experimental study on silts and silty sands. Pore pressure generation characteristics are evaluated and compared with that of sands. Pre- and post-liquefaction compressibility and coefficient of consolidation, and densification characteristics are determined from undrained cyclic tests data followed by dissipation. Implications of these findings on the earthquake performance of sites containing non-plastic silts and silty sands are discussed. Their impacts on the choice of ground improvement techniques are also discussed.