Volume 34, Issue 1 (January 2011)

    Static Testing of Pile-Base Post-Grouting Piles of the Suramadu Bridge

    (Received 15 December 2009; accepted 20 September 2010)

    Published Online: 2010

    CODEN: GTJOAD

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    Abstract

    Pile-base post-grouting is a method in which solidifiable cement slurry is injected into the base of the pile through grouting pipes after the strength of the concrete reaches a certain value to strengthen the loose sediment at the hole base and the soil around the pile. The roles of grouting are to eliminate the influence of the technological defects of bored piles, to recover the bearing capacities of strata, and to improve the bearing capacities of piles. Pile-base post-grouting piles technology and Osterberg Cell load testing were applied to some test piles of the Suramadu Bridge. Based on test results of the bearing capacity, side frictional resistance, and base resistance of piles before and after grouting, post-grouting was found to have an obvious role in improving the quality, bearing capacity, and load transfer characteristics of the piles. An equation for calculating post-grouting piles under specific grouting conditions was obtained based on the statistical analysis of more than 50 test piles. The ranges of the improvement coefficients of side frictional and pile-base resistance for different soils are given. Key technologies and parameters of post-grouting are also suggested. The results of this research can be applied to designing bridge pile foundations, which may tap the bearing potential of the piles and result in notable economic benefits.


    Author Information:

    Dai, Guoliang
    Associate Professor, College of Civil Engineering, Southeast Univ., Nanjing City, Jiangsu Province

    Gong, Weiming
    College of Civil Engineering, Southeast Univ., Nanjing City, Jiangsu Province

    Zhao, Xueliang
    College of Civil Engineering, Southeast Univ., Nanjing City, Jiangsu Province

    Zhou, Xiangqin
    College of Civil Engineering, Southeast Univ., Nanjing City, Jiangsu Province


    Stock #: GTJ102926

    ISSN: 0149-6115

    DOI: 10.1520/GTJ102926

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    Author
    Title Static Testing of Pile-Base Post-Grouting Piles of the Suramadu Bridge
    Symposium , 0000-00-00
    Committee A01