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Volume 35 Issue zk2
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LIU Kai-fu, FANG Peng-fei, LIU Xue-mei, HU Yi, XIE Xin-yu. Experimental study on vertical bearing performance of base post-grouted cast-in-place plies in soft soils[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(zk2): 1054-1057.
Citation: LIU Kai-fu, FANG Peng-fei, LIU Xue-mei, HU Yi, XIE Xin-yu. Experimental study on vertical bearing performance of base post-grouted cast-in-place plies in soft soils[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(zk2): 1054-1057.
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Experimental study on vertical bearing performance of base post-grouted cast-in-place plies in soft soils

  • 1. School of Civil Engineering and Architecture, Zhejiang Sci-Tech University, Hangzhou 310018, China; 2. School of Civil Engineering & Architecture , Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China; 3. Hangzhou Investigation and Design Institute, Hangzhou 310012, China; 4. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China

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  • Received Date: June 14, 2013
  • Published Date: November 24, 2013
    Graphical Abstract
    • Abstract
  • Bottom sediment of piles is often thick and impossible to clear completely because of the limitation in construction techniques of bored cast-in-place piles. It will reduce the bearing capacity of piles. The base post-grouting techniques inject cement slurry into pile bottom with its embedded pipe in order to reduce the detritus of pile bottom sediment and improve the bearing capacity of foundation piles. Combined with the static load test results of two piles with or without base post-grouting, the bearing performances of piles are analyzed comparatively. The load transfer mechanism and the behavior of base resistance and skin friction resistance of the piles before and after post-grouting are studied by the comparisons of the test results with the stress gages embedded in the pile shaft. The results show that the base post-grouting technique can improve the base resistance and the skin frictional resistance, and reduce effectively the settlement of foundation piles. The ultimate vertical bearing capacity of piles with base post-grouting is much larger than that without base post-grouting.
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    • References (12)
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