Volume 7, Issue 3 (September 1984)

    A Field Study of an Automatic SPT Hammer System

    CODEN: GTJOAD

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    Abstract

    A field comparison is made of standard penetration test (SPT) N values obtained using three automatic free fall hammers of the same design with N values obtained by five cathead and rope operators using four different drill rigs. A comparison of mean N values using the t-statistic at the 5% significance level generally indicates no significant difference in means. The tests were performed in a loessial soil in several parallel borings. The field N values were in the range of 5 to 15.


    Author Information:

    Riggs, CO
    Research engineer and president, Central Mine Equipment Company, St. Louis, MO

    Mathes, GM
    Vice-president, John Mathes and Associates, Columbia, IL

    Rassieur, CL
    Research engineer and president, Central Mine Equipment Company, St. Louis, MO


    Stock #: GTJ10492J

    ISSN: 0149-6115

    DOI: 10.1520/GTJ10492J

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    Author
    Title A Field Study of an Automatic SPT Hammer System
    Symposium , 0000-00-00
    Committee D18