Abstract Flaws could occur in drilled shafts due to improper quality control, poor workmanship, and unexpected construction mistakes, and thus seriously decrease the loading capacity. This paper proposes a flaw size estimation formula for use in the impulse response test of drilled shafts. Numerical models were built to develop the estimation formula. The experimental cases also validate the estimation. The flaw depth ratio and stiffness ratio are two key parameters to accomplish the estimation. With the evaluation results of the formula, one can know the possible minimum flaw size in the drilled shaft and further remedial measures can be taken immediately. Furthermore, the detectable shaft slenderness ratio is shown to vary from 10 to 30, depending on the stiffness ratio.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Estimating the flaw size in drilled shafts using an impulse response method


    Contributors:

    Published in:

    Publication date :

    2011-09-01


    Size :

    11 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Drilled shafts : student workbook

    National Highway Institute, Federal Highway Administration, US Department of Transportation / International Association of Foundation Drilling | TIBKAT | 1988




    Evaluation of Drilled Shafts with Self-Consolidating Concrete

    Ozyildirim, Celik / Sharp, Stephen R. | Transportation Research Record | 2013


    Laterally Loaded Drilled Shafts Embedded in Soft Rock

    Hwan Cho, Kook / Clark, Shane C. / Keaney, Brian D. et al. | Transportation Research Record | 2001