ZHANG Hong-chun, DAI Jing-liang, LI Xiao-zhong. Compactness automatic detecting method of subgrade for intelligent impact roller[J]. Journal of Traffic and Transportation Engineering, 2007, 7(5): 63-67.
Citation: ZHANG Hong-chun, DAI Jing-liang, LI Xiao-zhong. Compactness automatic detecting method of subgrade for intelligent impact roller[J]. Journal of Traffic and Transportation Engineering, 2007, 7(5): 63-67.

Compactness automatic detecting method of subgrade for intelligent impact roller

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  • Author Bio:

    Zhang Hong-chun(1968-), male, doctoral student of engineering, +86-371-67718613, zhang-hcxx@126.com

    Dai Jing-liang(1940-), male, professor, +86-29-82335137, jldai@126.com

  • Received Date: 2007-03-16
  • Publish Date: 2007-10-25
  • In order to improve the compactness detecting accuracy of subgrade, Rayleigh wave method was put forward to detect the degree of compaction of subgrade.Rayleigh wave was brought by using dropping hammer, its signal was detected by using detector, and recorded by using earthquake instrument.Processed Rayleigh wave was extracted by using τ-p transform, and its dispersion curve was obtained.The shear velocity of subgrade was invertely computed according to Rayleigh wave, the degree of compaction was computed according to the velocity, its profile diagram was analyzed, and it was detected by using Rayleigh wave method and pouring sand method, and the detecting results were compared.Comparison result shows that the compactness curves almost lap, the maximal absolute error is-0.300%, the maximal relative error is 0.308%, which indicates that the detecting result is credible, and the method is feasible to control impact rolling construction.

     

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