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Volume 35 Issue zk1
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ZHAO Cheng, DU Xing-hua, ZHAO Chun-feng, XIE Xiao-dong, ZHOU Yu-shi. Vertical bearing capacity of inner-digging prestressed piles[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(zk1): 393-398.
Citation: ZHAO Cheng, DU Xing-hua, ZHAO Chun-feng, XIE Xiao-dong, ZHOU Yu-shi. Vertical bearing capacity of inner-digging prestressed piles[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(zk1): 393-398.
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Vertical bearing capacity of inner-digging prestressed piles

  • 1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092,China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 3. Shanghai Municipal Engineering Design General Institute(Group)Co. ,Ltd, Shanghai 200092,China; 4. Shanghai Chengdi Construction & Development Co. ,Ltd, Shanghai 200062,China

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  • Received Date: February 28, 2013
  • Published Date: July 18, 2013
    Graphical Abstract
    • Abstract
  • To solve the disadvantages of the traditional construction methods for prestressed pipe piles like squeezing effect and noise and to expend their application, a new construction method, inner-digging method is studied. The static load test and other series field tests on hammer piles and inner-digging piles and are discussed, the vertical compressive properties and rules of load transfer of different kinds of piles are investigated. The test results show that the rules of load transfer of inner-digging pipe piles is the same as those of other kinds of piles. The inner-digging method will reduce the pile side resistance and make it lower than that of hammer-piles, but the post-grouting technology can effectively develop the ultimate bearing capacity. The ultimate bearing capacity of inner-digging piles is close to that of hammer piles, which can meet the requirements of construction and will have a good population and application value in the future.
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