›› 2012, Vol. 33 ›› Issue (9): 2569-2574.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Study of size and wall effects in seepage test of broadly graded coarse materials

ZHU Guo-sheng1, 2, ZHANG Jia-fa1, 2, CHEN Jin-song1, 2, HU Zhi-jing1, 2   

  1. 1. Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Yangtze River Scientific Research Institute, Wuhan 430010, China; 2. National Research Center for Dam Safety Technology, Yangtze River Scientific Research Institute, Wuhan 430010, China
  • Received:2012-05-10 Online:2012-09-11 Published:2012-09-12

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2016

Abstract: Size effect and wall effect are very common problems in seepage test of broadly graded coarse materials. A series of seepage tests are performed. The size effect is analyzed and the principle for apparatus size selection is studied. It is proposed that the apparatus diameter is not less than 6 times of test material’s d85. Effects of different methods for treating grains of size over limit on permeability test results are discussed. It is concluded that carefully taking equivalently alternative method is acceptable; while scale method is not. The wall effect is discussed and the thickness of wall treatment layer is proposed.

Key words: seepage test, size effect, wall effect, oversize treatment

CLC Number: 

  • TU 411
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