STP835

    Design of Laterally Loaded Displacement Piles Using a Driven Pressuremeter

    Published: Jan 1984


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    Abstract

    The nonlinear subgrade reaction method is widely used for the design of laterally loaded piles. This method replaces the soil reaction with a series of independent springs. The nonlinear behavior of the soil springs is represented by P-y curves, which relate soil reaction and pile deflection at points along the pile length. Most of the existing methods for obtaining P-y curves are highly empirical. Often little account is taken of the method of pile installation. The pressuremeter offers an almost ideal in-situ modelling tool for determining directly the P-y curves for a pile. As the pressuremeter can either be driven or self-bored into the soil, the results can be used to model either a displacement or a non-displacement pile.

    The driven pressuremeter used in the study described in this paper was essentially a standard pressuremeter with a solid 60° cone shoe at the tip. The instrument was pushed into the soil. This paper provides a detailed description of the equipment, testing procedures, and the theory that enables the family of P-y curves for laterally loaded displacement piles to be obtained. A case study, using the driven pressuremeter results to predict and compare the performance of two full-scale field lateral pile load tests, is presented.

    Keywords:

    design, piles, in situ, pressuremeter, lateral loading


    Author Information:

    Robertson, PK
    NSERC University research fellow, and professor and head of Civil Engineering Department, University of British Columbia, Vancouver, B.C.

    Hughes, JMO
    Consulting engineer, Vancouver, B.C.

    Campanella, RG
    NSERC University research fellow, and professor and head of Civil Engineering Department, University of British Columbia, Vancouver, B.C.

    Sy, A
    Engineer, Klohn Leonoff Ltd., Richmond, B.C.


    Paper ID: STP36824S

    Committee/Subcommittee: D18.11

    DOI: 10.1520/STP36824S


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