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    Volume 38, Issue 6 (November 2015)

    Quick Triaxial Consolidated Drained Test on Gravelly Soil

    (Received 17 September 2014; accepted 20 May 2015)

    Published Online: 26 November 2015

    CODEN: GTJODJ

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    Abstract

    Gravelly soil, a mixture of clay and gravel, has been widely used as a core material of high earth core rock fill dams. The triaxial consolidated drained (CD) test for gravelly soil is time-consuming, especially for larger scale test samples because of its low permeability caused by the high content of clay. This study presents a quick triaxial consolidated drained (QCD) test, which can greatly accelerate the CD test on gravelly soil. In the QCD test, the traditional cylindrical specimen was modified to a sand-core cylindrical specimen containing a hollow cylindrical specimen, and the sand column filled in the central hollow. As a result, the sand column in the center of the specimen greatly accelerates the water drainage of the specimen, and both the consolidation stage and the shear stage of the test can be finished quickly. Based on gravelly soil, the comparative tests, including CD tests and QCD tests, are performed. It is concluded that the QCD tests can be conducted more rapidly than CD tests, and the test results of QCD tests, for both stress–strain curves and the parameters of the Duncan–Chang model, are basically identical with that of the CD tests. The QCD test can greatly shorten the studying time on gravelly soil, i.e., the core material of earth core rock fill dams, thus speeding up the future design of dams.


    Author Information:

    Chen, Zhi-Bo
    Ph.D., Associate Professor, Dept. of Resources and Urban–Rural Construction, College of Environment and Resources, Fuzhou Univ., Fuzhou,

    Institute of Geotechnical and Geological Engineering, Fuzhou Univ., Fuzhou,

    Fujian Provincial Key Laboratory of Remote Sensing of Soil Erosion and Disaster Protection, Fuzhou Univ., Fuzhou,

    Zhu, Jun-Gao
    Ph.D., Professor, Research Institute of Geotechnical Engineering, Hohai Univ., Nanjing,

    Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai Univ., Nanjing,

    Jian, Wen-Bin
    Ph.D., Professor, Dept. of Resources and Urban–Rural Construction, College of Environment and Resources, Fuzhou Univ., Fuzhou,

    Institute of Geotechnical and Geological Engineering, Fuzhou Univ., Fuzhou,

    Fujian Provincial Key Laboratory of Remote Sensing of Soil Erosion and Disaster Protection, Fuzhou Univ., Fuzhou,


    Stock #: GTJ20140213

    ISSN:0149-6115

    DOI: 10.1520/GTJ20140213

    Author
    Title Quick Triaxial Consolidated Drained Test on Gravelly Soil
    Symposium ,
    Committee D18