ASTM D4506-13e1
(Test Method)Standard Test Method for Determining In Situ Modulus of Deformation of Rock Mass Using Radial Jacking Test
Standard Test Method for Determining In Situ Modulus of Deformation of Rock Mass Using Radial Jacking Test
SIGNIFICANCE AND USE
5.1 In this test method a volume of rock large enough to take into account the influence of discontinuities on the properties of the rock mass is loaded. This test method should be used when values are required which represent the true rock mass properties more closely than can be obtained through less expensive uniaxial jacking tests or other procedures.Note 1—The quality of the result produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing/sampling/inspection/etc. Users of this standard are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some of those factors.
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).2 An alternative procedure is also available and is based on a reference bar (2). More information on radial jacking and its analysis is presented in References (3-8).
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 Units—The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. Reporting of test results in units other than inch-pound shall not be regarded as nonconformance with this test method.
1.4.1 The gravitational system of inch-pound units is used when dealing with inch-pound units. In this system, the pound (lbf) represents a unit of force (weight), while the unit for mass is slugs.
1.5 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026.
1.5.1 The procedures used to specify how data are collected/recorded or calculated, in this standard are regarded as the industry standard. In addition, they are representative of the significant digits that generally should be retained. The procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user’s objectives; and it is common practice to increase or reduce significant digits of reported data to be commensurate with these considerations. It is beyond the scope of this standard to consider significant digits used in analytical methods for engineering design.
1.6 This standard does not purport to address all of the safety concerns, if any, 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.
General Information
Standards Content (Sample)
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Designation: D4506 − 13
Standard Test Method for
Determining In Situ Modulus of Deformation of Rock Mass
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Using Radial Jacking Test
This standard is issued under the fixed designation D4506; 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 (´) indicates an editorial change since the last revision or reapproval.
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ε NOTE—Editorial corrections were made throughout in February 2014.
1. Scope* industry standard. In addition, they are representative of the
significant digits that generally should be retained. The proce-
1.1 This test method is used to determine the in situ
dures used do not consider material variation, purpose for
modulus of deformation of rock mass by subjecting a test
obtaining the data, special purpose studies, or any consider-
chamber of circular cross section to uniformly distributed
ations for the user’s objectives; and it is common practice to
radial loading; the consequent rock displacements are
increase or reduce significant digits of reported data to be
measured, from which elastic or deformation moduli may be
commensuratewiththeseconsiderations.Itisbeyondthescope
calculated. The anisotropic deformability of the rock can also
of this standard to consider significant digits used in analytical
be measured and information on time-dependent deformation
methods for engineering design.
may be obtained.
1.6 This standard does not purport to address all of the
1.2 This test method is based upon the procedures devel-
safety concerns, if any, associated with its use. It is the
oped by the U.S. Bureau of Reclamation featuring long
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responsibility of the user of this standard to establish appro-
extensometers (1). An alternative procedure is also available
priate safety and health practices and determine the applica-
and is based on a reference bar (2). More information on radial
bility of regulatory limitations prior to use.
jacking and its analysis is presented in References (3-8).
1.3 Applicationofthetestresultsisbeyondthescopeofthis
2. Referenced Documents
test method, but may be an integral part of some testing
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programs. 2.1 ASTM Standards:
D653 Terminology Relating to Soil, Rock, and Contained
1.4 Units—The values stated in inch-pound units are to be
Fluids
regarded as standard. The values given in parentheses are
D3740 Practice for Minimum Requirements for Agencies
mathematical conversions to SI units that are provided for
Engaged in Testing and/or Inspection of Soil and Rock as
information only and are not considered standard. Reporting of
Used in Engineering Design and Construction
test results in units other than inch-pound shall not be regarded
D4403 Practice for Extensometers Used in Rock
as nonconformance with this test method.
D6026 Practice for Using Significant Digits in Geotechnical
1.4.1 The gravitational system of inch-pound units is used
Data
when dealing with inch-pound units. In this system, the pound
(lbf) represents a unit of force (weight), while the unit for mass
3. Terminology
is slugs.
1.5 All observed and calculated values shall conform to the 3.1 Definitions:
guidelines for significant digits and rounding established in
3.1.1 For definitions of common technical terms in this
Practice D6026.
standard, refer to Terminology D653.
1.5.1 Theproceduresusedtospecifyhowdataarecollected/
3.2 Definitions of Terms Specific to This Standard:
recorded or calculated, in this standard are regarded as the
3.2.1 deformation—the change in the diameter of the exca-
vation in rock (test chamber).
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ThistestmethodisunderthejurisdictionofASTMCommitteeD18onSoiland
Rock and is the direct responsibility of Subcommittee D18.12 on Rock Mechanics.
Current edition approved Nov. 1, 2013. Published December 2013. Originally
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approved in 1985. Last previous edition approved in 2008 as D4506 – 08. DOI: For referenced ASTM standards, visit the ASTM website, www.astm.org, or
10.1520/D4506-13E01. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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The boldface numbers in parentheses refer to the list of references appended to Standards volume information, refer to the standard’s Document Summary page on
this standard. the ASTM website.
*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 − 13
NOTE 1—The quality of the result produced by this standard is
4. Summary of Test Method
dependent on the competence of the personnel performing it, and the
4.1 A circular test chamber is excavated and a uniformly
suitability of the equipment and facilities used
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