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Article
Parametric Gmax sounding of granular soils by vibration methods
Géotechnique
  • Ronald Y. S. Pak, University of Colorado at Boulder
  • Jeramy C. Ashlock, Iowa State University
  • S. Kurahashi, OYO Corporation
  • F. Abedzadeh, Iowa State University
Document Type
Article
Publication Date
9-1-2008
DOI
10.1680/geot.2008.58.7.571
Abstract

To solicit a fundamental understanding of past difficulties of vibration sounding methods for granular soils, a collaborative experimental and analytical study was developed to examine the performance of dynamic surface plate load tests by scaled modelling. Focused on the benchmark small-strain regime and G max condition, multiple small-amplitude vibration tests on a rigid square plate resting on a uniform dry sand were conducted on a large geotechnical centrifuge. A set of basic experimental results on the vertical and rocking dynamic characteristics of the soil–plate system were generated by means of a new eccentric test format, as well as by conventional symmetrical vertical vibration. Through a comparison of the measured data with canonical continuum solutions of a half-space with constant as well as common depth-dependent shear modulus profiles, some fundamental issues in regard to the relevance of such commonly accepted idealisations of the intended practical application were revealed. As an experimental way to confirm and circumvent a key aspect of the problem, the novel test strategy of using a lightweight foundation in an embedded configuration was proposed and evaluated.

Comments

This article is from Géotechnique 58 (2008): 571–580, doi:10.1680/geot.2008.58.7.571. Posted with permission.

Rights
Permission is granted by ICE Publishing to print one copy for personal use. Any other use of these PDF files is subject to reprint fees.
Copyright Owner
ICE Publishing
Language
en
Date Available
2014-03-13
File Format
application/pdf
Citation Information
Ronald Y. S. Pak, Jeramy C. Ashlock, S. Kurahashi and F. Abedzadeh. "Parametric Gmax sounding of granular soils by vibration methods" Géotechnique Vol. 58 Iss. 7 (2008) p. 571 - 580
Available at: http://works.bepress.com/jeramy_ashlock/4/