Location

San Diego, California

Session Start Date

3-26-2001

Session End Date

3-31-2001

Abstract

The present study aims to clarify the deformation-strength properties of natural grounds consisting mainly of volcanic coarse-grained soils. Site investigations using cone penetration test (CPT), standard penetration test (SPT) and seismic cone penetration test (SCT) were performed at three sites in Hokkaido, Japan. In addition to these in-situ tests, a series of cyclic triaxial test on the undisturbed samples taken from their sites were also carried out to obtain the pseudo elastic shear modulus and damping ratio and their dependencies on strain level. From the test data, it was found that; (1) N-values obtained from SPT on crushable volcanic grounds are underestimated with the increase of the number of dynamic penetrations due to the particle breakage, (2) there are the linear relationships among ql from CPT, shear modulus GSC, obtained from SCT and SPT-N value for volcanic soil grounds, and (3) small strain shear modulus obtained from the in-situ and laboratory tests is independent of void ratios of volcanic grounds.

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

Evaluation of Deformation-Strength Properties of Volcanic Soils by Laboratory and In-Situ Testings

San Diego, California

The present study aims to clarify the deformation-strength properties of natural grounds consisting mainly of volcanic coarse-grained soils. Site investigations using cone penetration test (CPT), standard penetration test (SPT) and seismic cone penetration test (SCT) were performed at three sites in Hokkaido, Japan. In addition to these in-situ tests, a series of cyclic triaxial test on the undisturbed samples taken from their sites were also carried out to obtain the pseudo elastic shear modulus and damping ratio and their dependencies on strain level. From the test data, it was found that; (1) N-values obtained from SPT on crushable volcanic grounds are underestimated with the increase of the number of dynamic penetrations due to the particle breakage, (2) there are the linear relationships among ql from CPT, shear modulus GSC, obtained from SCT and SPT-N value for volcanic soil grounds, and (3) small strain shear modulus obtained from the in-situ and laboratory tests is independent of void ratios of volcanic grounds.