›› 2011, Vol. 32 ›› Issue (7): 2073-2078.

• Geotechnical Engineering • Previous Articles     Next Articles

Density identification method of dam foundation deep overburden

SHI Xiu-song，CHENG Zhan-lin，ZUO Yong-zhen，HU Sheng-gang   

  1. Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Yangtze River Scientific Research Institute, Wuhan 430010, China
  • Received:2009-11-16 Online:2011-07-10 Published:2011-06-30

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Abstract: Density identification method of dam foundation deep overburden is put forward. The Weibull distribution model is established based on 8 holes, 106 points field pressuremeter tests in dam foundation deep overburden of Shuangjiangkou Hydropower Station. Parameters of the distribution are estimated by least-squares method based on the test results above; and the goodness-of-fit of Weibull distributions is tested. The corresponding relations among pressuremeter modulus, density and pressure are investigated by 20 sets of model tests using the given grading curve acquired in field exploration. The exponential relation of pressuremeter modulus and density is determined by model tests. Based on those above, the authors carry out randomly numerical simulation of the density of dam foundation deep overburden. The simulated density of second-overburden is obtained and its practicability is proved through comparing with exploration results

Key words: deep overburden, density identification, Weibull distribution, randomly simulation, pressuremeter test

CLC Number: 

  • TU 41
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