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Volume 41 Issue S2
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WANG Meng, CAI Guo-jun, LIU Wen-liang, WU Jia-ming, LIU Song-yu, LIN Jun, DAI Ji-qun. Evaluation of engineering characteristics of new and old soft soil foundation based on advanced CPTU data[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(S2): 81-84. DOI: 10.11779/CJGE2019S2021
Citation: WANG Meng, CAI Guo-jun, LIU Wen-liang, WU Jia-ming, LIU Song-yu, LIN Jun, DAI Ji-qun. Evaluation of engineering characteristics of new and old soft soil foundation based on advanced CPTU data[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(S2): 81-84. DOI: 10.11779/CJGE2019S2021
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Evaluation of engineering characteristics of new and old soft soil foundation based on advanced CPTU data

  • 1. Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China;
    2. China Design Group Co., Ltd., Nanjing 210096, China;
    3. Nanjing Hydraulic Research Institute, Nanjing 210029, China

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  • Received Date: April 29, 2019
  • Published Date: July 19, 2019
    Graphical Abstract
    • Abstract
  • The widening project of highways on soft soil foundation faces great challenges. It is necessary to evaluate the engineering characteristics of the new and old foundation soils comprehensively. The traditional methods in laboratory cause disturbance to the soils, which is long and costly. As a new in-situ testing technology, CPTU, can be used to obtain parameters precisely and continuously including cone tip resistance, sidewall friction and pore water pressure. The multi-functional CPTU technology is used to test the new and old foundation soils of the Beijing-Shanghai Expressway. Based on the bearing capacity theory and the cavity expansion theory, the parameters of the old and new foundation soils are interpreted, such as the stress history, deformation and consolidation. It’s found that the distribution, thickness and depth of soft soil layer can be more determined accurately. In addition, the above-mentioned important engineering parameters can be provided as the scientific evidences for the prediction of differential settlement of old roadbed and the design and construction of subgrade splicing.
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    • References (10)
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