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Volume 38 Issue 5
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ZHAO Yun, LING Dao-sheng, WANG Yun-long, HUANG Bo. Modified one-step method and its adaptive system of TDR[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(5): 818-827. DOI: 10.11779/CJGE201605007
Citation: ZHAO Yun, LING Dao-sheng, WANG Yun-long, HUANG Bo. Modified one-step method and its adaptive system of TDR[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(5): 818-827. DOI: 10.11779/CJGE201605007
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Modified one-step method and its adaptive system of TDR

  • 1. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China;
    2. Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China

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  • Received Date: April 13, 2015
  • Published Date: May 24, 2016
    Graphical Abstract
    • Abstract
  • The key of using the technology of time domain reflectometry (TDR) is to establish the empirical equation for the relationship among electromagnetic parameters, water content and dry density. Based on the one-step method, two empirical equations are established for the content, dry density, apparent dielectric constant and drop volt parameter, which can calculate the water content and dry density respectively. Then the influence laws of compaction energy, pore fluid conductivity and temperature on the calculated results by the new equations are analyzed. After calibration, the relative error of dry density is within ±5%, and the error of water content is within±0.02 g.g-1. Meanwhile, an adaptive method is proposed to test the water content and dry density by using the TDR method conveniently and efficiently in the field tests in which the calibration tests may not be comducted.
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    • References (30)
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