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Volume 40 Issue S2
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WAN Zhi-hui, DAI Guo-liang, WANG Lei, GONG Wei-ming, ZHU Ming-xing. Experimental study on bearing behaviors of post-grouting bored piles in cohesive soils[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S2): 194-198. DOI: 10.11779/CJGE2018S2039
Citation: WAN Zhi-hui, DAI Guo-liang, WANG Lei, GONG Wei-ming, ZHU Ming-xing. Experimental study on bearing behaviors of post-grouting bored piles in cohesive soils[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S2): 194-198. DOI: 10.11779/CJGE2018S2039
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Experimental study on bearing behaviors of post-grouting bored piles in cohesive soils

  • 1. Key Laboratory for RC and PRC Structure, Ministry of Education, Nanjing 211189, China;
    2. School of Civil Engineering, Southeast University, Nanjing 211189, China;
    3. China Energy Engineering Group Jiangsu Power Design Institute Co., Ltd., Nanjing 211102, China

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  • Received Date: July 21, 2018
  • Published Date: October 29, 2018
    Graphical Abstract
    • Abstract
  • Based on the load tests on eight field piles at four sites of Jianghai West Road in Wuxi City, the bearing and deformation characteristics of piles, bearing capacities at pile tip and friction behaviors of the grouted piles are studied by comparing the field test results of the ungrouted and grouted piles. The results show that the pile tip grouting technique can significantly improve the bearing capacity of pile foundation and has a good effect on improving the stability of pile quality. The cement-stabilized soil is formed at the pile tip by the pile tip pressurized grout, which the sediment at the pile tip is effectively improved, and the bearing performances of the pile tip and the bearing stiffness are significantly enhanced. Moreover, the side friction ultimate resistance is significantly improved by the pile tip post grouting, and the side friction ultimate resistance of the grouted piles is larger than that of the ungrouted ones. Consequently, the stability of the bearing capacity of the pile foundation is improved by the pile tip post grouting.
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    • References (12)
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