Optical Measurement of Sand Deformation around a Laterally Loaded Pile

    Volume 39, Issue 5 (September 2011)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Published Online: 2 May 2011

    Page Count: 6


    Liu, Jinyuan
    Assistant Professor, Department of Civil Engineering, Ryerson University, Toronto, ON

    Yuan, Bingxiang
    Ph.D. Candidate, School of Civil Engineering and Mechanics, Lanzhou University,

    Mai, Van Thien
    Research Assistant, Department of Civil Engineering, Ryerson University, Toronto, ON

    Dimaano, Ralph
    Research Assistant, Department of Civil Engineering, Ryerson University, Toronto, ON

    (Received 12 August 2010; accepted 18 March 2011)

    Abstract

    A sand displacement field around a laterally loaded pile is measured using an image processing technique called digital image correlation. An optical system consisting of a camera, a loading frame, and a computer is developed to capture soil movement during laterally loading the pile. Two images, before and after a deformation, are used to calculate the soil displacement field. Two kinds of piles are used in the tests: one squared-section pile and the other a circular one. Dry loose sand samples are used to simplify the problem. The displacement and strain fields obtained in this study are similar to the ones reported from the field. A trapezoidal strain wedge is measured in sand in front of the laterally loaded pile. The strain wedge develops from the pile edges. The failure planes form an angle with the horizontal, which varies between approximately two-thirds of the frictional angle of soil for the square pile and three-fourths for the circular pile.


    Paper ID: JTE103313

    DOI: 10.1520/JTE103313

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    Author
    Title Optical Measurement of Sand Deformation around a Laterally Loaded Pile
    Symposium , 0000-00-00
    Committee D18