For the past decade, the Osterberg testing method (O-cell test) has been proved advantageous over the conventional pile load testing method in many aspects. However, because the O-cell test uses a loading mechanism entirely different from that of the conventional pile loading testing method, many investigators and practicing engineers have been concerned that the O-cell test would give inaccurate results, especially about the pile head settlement behavior. Therefore, a bidirectional load test using the Osterberg method and the conventional top-down load test were executed on 1.5-m diameter cast-in-place concrete piles at the same time and site. Strain gauges were placed on the piles. The two tests gave similar load transfer curves at various depth of piles. However, the top-down equivalent curve constructed from the bidirectional load test results predicted the pile head settlement under the pile design load to be approximately one half of that predicted by the conventional top-down load test. To improve the prediction accuracy of the top-down equivalent curve, a simple method that accounts for the pile compression was proposed. It was also shown that the strain gauge measurement data from the bidirectional load test could reproduce almost the same top-down curve.


    Zugriff

    Download

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Comparison of the Bidirectional Load Test with the Top-Down Load Test


    Weitere Titelangaben:

    Transportation Research Record: Journal of the Transportation Research Board


    Beteiligte:
    Kwon, Oh Sung (Autor:in) / Choi, Yongkyu (Autor:in) / Kwon, Ohkyun (Autor:in) / Kim, Myoung Mo (Autor:in)


    Erscheinungsdatum :

    01.01.2005




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Comparison of the Bidirectional Load Test with the Top-Down Load Test

    Kwon, Oh / Choi, Yongkyu / Kwon, Ohkyun et al. | Transportation Research Record | 2005



    High-speed movement wear test device under bidirectional load pushing

    SU SHAOPU / ZHUO YI / WANG HU et al. | Europäisches Patentamt | 2025

    Freier Zugriff


    LOAD TEST APPARATUS

    Europäisches Patentamt | 2017

    Freier Zugriff