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    Volume 41, Issue 1 (January 2018)

    A Photographic Method for Measuring Soil Deformations during Internal Erosion under Triaxial Stress Conditions

    (Received 22 January 2017; accepted 11 July 2017)

    Published Online: 2018

    CODEN: GTJODJ

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    Abstract

    Internal erosion involves the migration of soil particles under seepage flow and is a primary cause of dam failure and distress. With the loss of soil particles, the remaining soil grains will rearrange, resulting in soil deformations and significant settlement. In this research, a photographic method was developed to measure the soil deformations caused by internal erosion on a modified triaxial apparatus. Photos were taken by a high-resolution camera at a certain time interval. By comparing image data between any two snapshots, the process of soil deformation can be obtained. In the experiments, the soil specimen experienced marked deformations during internal erosion. Heterogeneous soil deformations also developed across the specimen because of the nonuniformity of the soil pores and the nonuniform migration of fine particles. Both the global and local soil deformations during the whole internal erosion process were obtained using the photographic method. The maximum lateral deformation occurred at the middle part of the soil specimen, whereas the soil deformations along the vertical direction were relatively uniform.

    Author Information:

    Chen, C.
    Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology,

    Zhang, L. M.
    Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology,

    Zhu, Hong
    Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology,


    Stock #: GTJ20170031

    ISSN:0149-6115

    DOI: 10.1520/GTJ20170031

    Author
    Title A Photographic Method for Measuring Soil Deformations during Internal Erosion under Triaxial Stress Conditions
    Symposium ,
    Committee D18