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Volume 37 Issue 10
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ZHU Jun-gao, GUO Wan-li, WANG Yuan-long, WEN Yan-feng. Equation for soil gradation curve and its applicability[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(10): 1931-1936. DOI: 10.11779/CJGE201510023
Citation: ZHU Jun-gao, GUO Wan-li, WANG Yuan-long, WEN Yan-feng. Equation for soil gradation curve and its applicability[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(10): 1931-1936. DOI: 10.11779/CJGE201510023
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Equation for soil gradation curve and its applicability

  • 1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;
    2. Geotechnical Research Institute, Hohai University, Nanjing 210098, China;
    3. Department of Civil Engineering, North University of China, Taiyuan 030051, China;
    4. Department of Geotechnical Engineering, China Institute of Water Resources and Hydropower Research, Beijing 100038, China

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  • Received Date: December 08, 2014
  • Published Date: October 19, 2015
    Graphical Abstract
    • Abstract
  • A new gradation equation which can be used to describe continuous gradation is put forward. Basic properties and reflection ability for different soils of the equation are studied, and general applicability of the equation is validated. The study shows that the equation can describe three typical soil gradation curves which are hyperbola, reversed S-shaped and approximate straight line shape, and has a wide applicability of clay, silt, sand and coarse-grained soil. The shape of gradation curve is determined by parameter b, namely hyperbola or reversed S-shaped, and when m is small, the curve is similar to a straight line. The slope of the curve is mainly determined by parameter m, and increases with the increase of m. The equation has more obvious advantages and broader applicability than Swamee's. Gradation curves of artificial blasting rockfill material from six earth-rock dams at home and abroad are studied, indicating that the range of parameters is roughly -0.28<b<0.64 and 0.45<m<0.75.
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    • References (18)
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