STP361

    Pore Pressure Control and Evaluation for Triaxial Compression

    Published: Jan 1964


      Format Pages Price  
    PDF (204K) 10 $25   ADD TO CART
    Complete Source PDF (9.4M) 10 $126   ADD TO CART


    Abstract

    The effective stress analysis of soils requires that pore pressure be evaluated throughout a compression test. The initial negative (capillary) pressure is first determined. If this capillary pressure is large, the measuring system always must be controlled so that its suction never exceeds the water separation limit. Then the pore water pressure can be measured accurately when the volume change is sufficient to increase it to values that can be measured directly. By combining the initial pressure with the measurable pressure values and relating them to volume change, a complete pore pressure evaluation is obtained. This paper presents the procedures, even for soils with capillary pressures that have negative values considerably greater than 1 atmosphere.


    Author Information:

    Gibbs, HJ
    Head, Bureau of Reclamation, Denver, Colo.


    Paper ID: STP29996S

    Committee/Subcommittee: D18.05

    DOI: 10.1520/STP29996S


    CrossRef ASTM International is a member of CrossRef.