Interpretation of field load tests on piles has many important practical and financial implications in foundation engineering practice. However, identifying the ultimate capacity or resistance on a continuous load settlement curve remains elusive. The geotechnical engineering literature abounds with over 40 criteria to aid in interpreting the ultimate capacity from static load tests on deep foundations. These include settlement, settlement rate, offset, and creep criteria, among others. Since the 1990s criteria proposed by Davisson, AASHTO, and New York City Building Code as well as the 5% and 10% of diameter criteria have evolved to become the most routinely specified for all foundations, without assessing their performance or what they have been intended for. This study provides a side-by-side comparison of the performance of these methods in relation to usability, accuracy, precision, and length and diameter effects. In addition, the performance is also compared with the recently developed NYU criterion where the capacity is taken as the smallest of (i) a settlement corresponding to the elastic compression plus 0.75 in.; (ii) the capacity at plunging or strain-softening; or (iii) settlement corresponding to 5% of the pile diameter, unless the settlement threshold is modified by the structural engineer of record. Assessment is made possible using a database of 350 load tests conducted on square and round concrete piles, open and closed steel pipe piles, as well as H-piles. Comparison suggests that the NYU criterion is the most versatile, precise, and accurate among the examined methods.


    Zugriff

    Download

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Universal Criterion for Interpreting Capacity from Load Tests on Piles


    Weitere Titelangaben:

    Transportation Research Record: Journal of the Transportation Research Board


    Beteiligte:


    Erscheinungsdatum :

    05.05.2022




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Records of load tests on friction piles

    Peck, R.B. | Engineering Index Backfile | 1961


    Calculating the Vertical Bearing Capacity of Piles with Nonlinear Load Transfer Model

    Zhang, Yang / Zhao, Minghua / Zhang, Yongjie | ASCE | 2012


    Comparison of static and dynamic load tests on bored piles in glacial soil

    Niederleithinger, Ernst / Baeßler, Matthias / Georgi, Steven et al. | HENRY – Bundesanstalt für Wasserbau (BAW) | 2014

    Freier Zugriff

    Axial capacity of tapered piles

    El Naggar, M. H. / Wei, J. / Canadian Society for Civil Engineering | British Library Conference Proceedings | 1998


    Repair of Timber Piles Using Ultra-High-Performance Concrete: Investigation of Load Transfer and Load-Carrying Capacity

    Sosa Cardenas, Carlos / Mantawy, Islam M. / Azizinamini, Atorod | Transportation Research Record | 2022