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

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.

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Historical
Publication Date
09-Jan-2002
Technical Committee
Drafting Committee
Current Stage
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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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D4506–02
Standard Test Method for
Determining the In Situ Modulus of Deformation of Rock
1
Mass Using a Radial Jacking Test
This standard is issued under the fixed designation D 4506; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope * 3. Terminology
1.1 This test method is used to determine the in situ 3.1 Definitions: See Terminology D 653 for general defini-
modulus of deformation of rock mass by subjecting a test tions.
chamber of circular cross section to uniformly distributed 3.2 Definitions of Terms Specific to This Standard:
radial loading; the consequent rock displacements are mea- 3.2.1 deformation—the change in the diameter of the exca-
sured, from which elastic or deformation moduli may be vation in rock (test chamber).
calculated. The anisotropic deformability of the rock can also
4. Summary of Test Method
be measured and information on time-dependent deformation
4.1 A circular test chamber is excavated and a uniformly
may be obtained.
1.2 This test method is based upon the procedures devel- distributed pressure is applied to the chamber surfaces by
means of flat jacks positioned on a reaction frame. Rock
oped by the U.S. Bureau of Reclamation featuring long
2
extensometers (1) . An alternative procedure is also available deformation is measured by extensometers placed in boreholes
perpendicular to the chamber surfaces. Pressure is measured
and is based on a reference bar (2).
1.3 Applicationofthetestresultsisbeyondthescopeofthis with a standard hydraulic transducer. During the test, the
pressure is cycled incrementally and deformation is read at
test method, but may be an integral part of some testing
programs. each increment. The modulus is then calculated. To determine
time-dependent behavior, the pressure is held constant and
1.4 The values stated in inch-pound units are to be regarded
as the standard. deformation is observed over time.
1.5 This standard does not purport to address all of the
5. Significance and Use
safety concerns, if any, associated with its use. It is the
5.1 Usingthistestmethod,avolumeofrocklargeenoughto
responsibility of the user of this standard to establish appro-
take into account the influence of discontinuities on the
priate safety and health practices and determine the applica-
properties of the rock mass is loaded. The test should be used
bility of regulatory limitations prior to use.
when values are required which represent the true rock mass
2. Referenced Documents
properties more closely than can be obtained through less
2.1 ASTM Standards: expensive uniaxial jacking tests or other procedures.
D 653 Terminology Relating to Soil, Rock, and Contained
NOTE 1—The quality of the result produced by this standard is
3
Fluids
dependent on the competence of the personnel performing it, and the
D 3740 Practice for Minimum Requirements for Agencies
suitability of the equipment and facilities used. Agencies that meet the
Engaged in the Testing and/or Inspection of soil and Rock criteria of Practice D 3740 are generally considered capable of competent
3
and objective testing/sampling/inspection/etc. Users of this standard are
as Used in Engineering Design and Construction
3
cautioned that compliance with Practice D 3740 does not in itself assure
D 4403 Practice for Extensometers Used in Rock
reliable results. Reliable results depend on many factors; Practice D 3740
provides a means of evaluating some of those factors.
1
ThistestmethodisunderthejurisdictionofASTMCommitteeD18onSoiland
6. Apparatus
Rock and is the direct responsibility of Subcommittee D18.12 on Rock Mechanics.
Current edition approved Jan. 10, 2002. Published April 2002. Originally
6.1 ChamberExcavationEquipment—Thisincludesdrilling
published as D 4506 – 85. Last previous edition D 4506 – 90(1995).
and “smooth wall” blasting equipment or mechanical excava-
2
The boldface numbers in parentheses refer to the list of references appended to
tion equipment capable of producing typically a 9-ft (3-m)
this standard.
3
Annual Book of ASTM Standards, Vol 04.08. diameter tunnel with a length about three times that dimension.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D4506
6.2 Concreting Equipment—Concreting materials and the maximum of the full circumference of the lining with
equipment for lining the tunnel, together with strips of weak sufficient separation to allow displacement measurements, and
...

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