›› 2009, Vol. 30 ›› Issue (12): 3705-3709.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Study of critical gradient of piping for various grain sizes in sandy gravels

MAO Chang-xi, DUAN Xiang-bao, WU Liang-ji   

  1. Nanjing Hydraulic Research Institute, Nanjing 210029, China
  • Received:2009-06-08 Online:2009-12-10 Published:2010-01-18

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Abstract:

The practical application of seepage force concept to the piping problem research is described. According to the limit equilibrium between seepage force and buoyant weight of soil grains, the formulas to compute piping critical gradient for various grain sizes in sandy gravels of piping soil are derived. And then they are verified by many data of piping experiments; it is shown that these formulas are reasonable and responsible.

Key words: seepage force, piping, various grain sizes, critical gradient, sandy gravels, piping soil, grain size distribution curve

CLC Number: 

  • TV 139.11
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