ASTM D4506-02

    Standard Test Method for Determining the In Situ Modulus of Deformation of Rock Mass Using a Radial Jacking Test


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    1. Scope

    1.1 This test method is used to determine the in situ modulus of deformation of rock mass by subjecting a test chamber of circular cross section to uniformly distributed radial loading; the consequent rock displacements are measured, from which elastic or deformation moduli may be calculated. The anisotropic deformability of the rock can also be measured and information on time-dependent deformation may be obtained.

    1.2 This test method is based upon the procedures developed by the U.S. Bureau of Reclamation featuring long extensometers (1) . An alternative procedure is also available and is based on a reference bar (2).

    1.3 Application of the test results is beyond the scope of this test method, but may be an integral part of some testing programs.

    1.4 The values stated in inch-pound units are to be regarded as the standard.

    1.5 This standard does not purport to address the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D653 Terminology Relating to Soil, Rock, and Contained Fluids

    D3740 Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction

    D4403 Practice for Extensometers Used in Rock

    D6026 Practice for Using Significant Digits in Geotechnical Data


    ICS Code

    ICS Number Code 93.020 (Earth works. Excavations. Foundation construction. Underground works)

    UNSPSC Code

    UNSPSC Code


    Referencing This Standard
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    DOI: 10.1520/D4506-02

    Citation Format

    ASTM D4506-02, Standard Test Method for Determining the In Situ Modulus of Deformation of Rock Mass Using a Radial Jacking Test, ASTM International, West Conshohocken, PA, 2002, www.astm.org

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