Research on technology of obtaining undisturbed soil samples from Wuhan first stage terrace of the Yangtze River
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1.Hubei Institute of Urban Geological Engineering, Wuhan Hubei 430050, China;2.Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan Hubei 430061, China;3.Hubei Geological Build Prospecting & Engineering Co., Ltd., Wuhan Hubei 430050, China

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TU412;P634

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    Abstract:

    In this paper, the current technical standards and industry status for obtaining undisturbed soil samples is introduced, moreover, the drilling methods, comprehensive analysis of suitability for sampling tool selection, soil sample packaging and transportation methods are studied. The comparative experimental research indicates that the original obtained samples show excellent performance in on-site quality evaluation, indoor sample preparation, and experimental performance under the following two conditions in Wuhan first stage terrace of the Yangtze River. In clay laye, hammer drilling combined with open thin-walled soil samplers is adopted, while in sandy soil layer, the hammer and rotary drilling combined with built-in ring cutter soil sampler is used supplemented by rubber cover and tape sealing. Based on this method, the original structure of the sample is less disturbed, and the original structural force of the soil is also well maintained.

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History
  • Received:December 05,2023
  • Revised:January 19,2024
  • Adopted:January 31,2024
  • Online: August 02,2024
  • Published: July 10,2024