Laboratory Evaluation of Horizontal Stress in Overconsolidated Sands

    Volume 19, Issue 1 (March 1996)

    ISSN: 0149-6115

    CODEN: GTJOAD

    Page Count: 10


    Abdi, H
    Engineer, GeoResearch International Inc., Gloucester, Ontario

    Garga, VK
    Professor, University of Ottawa, Ottawa, Ontario

    Abstract

    This paper describes a method for the determination of in situ horizontal stresses of heavily overconsolidated sands using a stress-path triaxial apparatus. This method was proposed by Garga and Khan (1991), who applied it to overconsolidated clays. The proposed method is based on the concept that if the radial stress exceeds the in situ horizontal stress while maintaining the axial stress constant and equal to the in situ vertical effective stress, only then will the specimen experience significant axial strain.

    In this investigation, the above method was applied to specimens of known stress histories of overconsolidated sand. Simulation of complex stress histories was carried out by subjecting the soil specimens to one and two cycles of loading in drained conditions (rate of loading or unloading: 0.05 kPa/min). It was found that the proposed method replicated the simulated in situ horizontal stress exactly. The technique is capable of estimating K0 irrespective of the previously imposed stress history.


    Paper ID: GTJ11411J

    DOI: 10.1520/GTJ11411J

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    Author
    Title Laboratory Evaluation of Horizontal Stress in Overconsolidated Sands
    Symposium , 0000-00-00
    Committee D18