Shear-Wave Velocity to Evaluate In-Situ State of Ottawa Sand

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  • Abstract: The initial state of a sand, defined by the void ratio and effective mean normal stress, can be used to predict its large-strain response. Laboratory studies have shown that the shear-wave velocity of a sand is controlled primarily by the effective confining stresses and void ratio. Since shear-wave velocity can be measured both in the field and in the laboratory, there is an increasing interest in using shear-wave velocity to define the state of a sand. This paper presents an experimental study of shear-wave velocity interpretation for clean Ottawa sand based on steady/critical state concepts. The results show that the large-strain behavior of Ottawa sand can be estimated using shear-wave velocity measurements combined with a knowledge of the in-situ effective stress. Knowledge of the state of a sand makes it possible to estimate the boundary between either a contractant or dilatant sand at large strains. Based on these findings, a preliminary method to evaluate the potential for flow liquefaction using shear-wave velocity measurements is presented.

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    Article (Published)
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    © 1995 American Society of Civil Engineers. This version of this article is open access and can be downloaded and shared. The original author(s) and source must be cited.
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    • Robertson, P.K., Sasitharan, S., Cunning, J.C. and Sego, D.C. (1995). Shear-Wave Velocity to Evaluate In-Situ State of Ottawa Sand. Journal of Geotechnical Engineering, 121, 262. DOI: 10.1061/(ASCE)0733-9410(1995)121:3(262).