Location

San Diego, California

Session Start Date

3-26-2001

Session End Date

3-31-2001

Abstract

Using a newly developed large ring-shear apparatus, a series of tests was conducted on silty soils to study their undrained shear behavior. The samples were made by mixing loess into a fine-grained silica sand with 10, 20, and 30% loess by weight. By performing tests at different initial void ratio, the undrained shear behavior of samples with different loess contents at loose and medium-dense states was presented and discussed. Basing on the tests results, effects of loess contents on the peak and residual shear strengths are examined. It was found that adding loess into the host sand could lower the peak and residual shear strengths; and these two strengths decreases with increasing loess content. Meanwhile, with increasing loess content, the dissipation of generated pore pressure from the shear zone becomes remarked slower when the shear box was turned into drained conditions, and there is little, if any, dissipation for tests on the mixture with 30% loess.

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

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

Fluidization Behavior of Silty Soils in the Shear Zone Base on Ring Shear Tests

San Diego, California

Using a newly developed large ring-shear apparatus, a series of tests was conducted on silty soils to study their undrained shear behavior. The samples were made by mixing loess into a fine-grained silica sand with 10, 20, and 30% loess by weight. By performing tests at different initial void ratio, the undrained shear behavior of samples with different loess contents at loose and medium-dense states was presented and discussed. Basing on the tests results, effects of loess contents on the peak and residual shear strengths are examined. It was found that adding loess into the host sand could lower the peak and residual shear strengths; and these two strengths decreases with increasing loess content. Meanwhile, with increasing loess content, the dissipation of generated pore pressure from the shear zone becomes remarked slower when the shear box was turned into drained conditions, and there is little, if any, dissipation for tests on the mixture with 30% loess.