ASTM D6760-08
(Test Method)Standard Test Method for Integrity Testing of Concrete Deep Foundations by Ultrasonic Crosshole Testing
Standard Test Method for Integrity Testing of Concrete Deep Foundations by Ultrasonic Crosshole Testing
SIGNIFICANCE AND USE
This method uses data from ultrasonic probes lowered into parallel access ducts, or in a single access duct, in the deep foundation element to assess the homogeneity and integrity of concrete between the probes. The data are used to confirm adequate concrete quality or identify zones of poor quality. If defects are detected, then further investigations should be made by excavation or coring the concrete as appropriate, or by other testing such as Test Method D 1143, D 4945 or D 5882, and measures taken to remediate the structure if a defect is confirmed.
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 D 3740 are generally considered capable of competent and objective testing and inspection. Users of this standard are cautioned that compliance with Practice D 3740 does not in itself assure reliable results. Reliable results depend on many factors; Practice D 3740 provides a means of evaluating some of those factors.
SCOPE
1.1 This test method covers procedures for checking the homogeneity and integrity of concrete in deep foundation such as bored piles, drilled shafts, concrete piles or augercast piles. This method can also be extended to diaphragm walls, barrettes, dams etc. In this test method, all the above will be designated “deep foundation elements.” The test measures the propagation time and relative energy of an ultrasonic pulse between parallel access ducts (crosshole) or in a single tube (single hole) installed in the deep foundation element. This method is most applicable when performed in tubes that are installed during construction.
1.2 Similar techniques with different excitation sources exist, but these techniques are outside the scope of this test method.
1.3 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D 6026.
1.3.1 The method used to specify how data are collected, calculated, or recorded in this standard is not directly related to the accuracy to which data can be applied in design or other uses, or both. How one applies the results obtained using this standard is beyond its scope.
1.4 The method used to specify how data are collected, calculated, or recorded in this test method is not directly related to the accuracy to which data can be applied in design or other uses, or both. How one applies the results obtained using this standard is beyond its scope.
1.5 This standard provides minimum requirements for crosshole (or single hole) testing of concrete deep foundation elements. Plans, specifications, provisions, or combinations thereof prepared by a qualified engineer, and approved by the agency requiring the test(s), may provide additional requirements and procedures as needed to satisfy the objectives of a particular test program.
1.6 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.
1.7 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.8 Limitations—Proper installation of the access ducts is essential for effective testing and interpretation. The method does not give the exact type of defect (for example, inclusion, honeycombing, lack of cement particles, etc.) but rather only that a defect exists. The method is limited primarily to testing the concrete between the access ducts and thus gives little information about the concrete outside the reinforcement cage to which the access ducts are attached when the tubes are attached to the inside of the reinforcement cage.
1.9 This standard does not purport to address all of the safety concerns, if any, associated w...
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Designation: D6760 − 08
StandardTest Method for
Integrity Testing of Concrete Deep Foundations by
1
Ultrasonic Crosshole Testing
This standard is issued under the fixed designation D6760; 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.
1. Scope 1.6 The text of this standard references notes and footnotes
which provide explanatory material.These notes and footnotes
1.1 This test method covers procedures for checking the
(excluding those in tables and figures) shall not be considered
homogeneity and integrity of concrete in deep foundation such
as requirements of the standard.
as bored piles, drilled shafts, concrete piles or augercast piles.
This method can also be extended to diaphragm walls, 1.7 The values stated in SI units are to be regarded as
barrettes, dams etc. In this test method, all the above will be standard. No other units of measurement are included in this
designated “deep foundation elements.” The test measures the standard.
propagation time and relative energy of an ultrasonic pulse
1.8 Limitations—Proper installation of the access ducts is
between parallel access ducts (crosshole) or in a single tube
essential for effective testing and interpretation. The method
(single hole) installed in the deep foundation element. This
does not give the exact type of defect (for example, inclusion,
method is most applicable when performed in tubes that are
honeycombing, lack of cement particles, etc.) but rather only
installed during construction.
that a defect exists. The method is limited primarily to testing
1.2 Similar techniques with different excitation sources the concrete between the access ducts and thus gives little
exist, but these techniques are outside the scope of this test information about the concrete outside the reinforcement cage
method. to which the access ducts are attached when the tubes are
attached to the inside of the reinforcement cage.
1.3 All observed and calculated values shall conform to the
1.9 This standard does not purport to address all of the
guidelines for significant digits and rounding established in
safety concerns, if any, associated with its use. It is the
Practice D6026.
responsibility of the user of this standard to establish appro-
1.3.1 The method used to specify how data are collected,
priate safety and health practices and determine the applica-
calculated, or recorded in this standard is not directly related to
bility of regulatory limitations prior to use.
the accuracy to which data can be applied in design or other
uses, or both. How one applies the results obtained using this
2. Referenced Documents
standard is beyond its scope.
2
2.1 ASTM Standards:
1.4 The method used to specify how data are collected,
D1143 Test Method for Piles Under Static Axial Compres-
calculated,orrecordedinthistestmethodisnotdirectlyrelated
3
sive Load (Withdrawn 2005)
to the accuracy to which data can be applied in design or other
D3740 Practice for Minimum Requirements for Agencies
uses, or both. How one applies the results obtained using this
Engaged in Testing and/or Inspection of Soil and Rock as
standard is beyond its scope.
Used in Engineering Design and Construction
1.5 This standard provides minimum requirements for
D4945 Test Method for High-Strain Dynamic Testing of
crosshole (or single hole) testing of concrete deep foundation
Deep Foundations
elements. Plans, specifications, provisions, or combinations
D5882 Test Method for Low Strain Impact Integrity Testing
thereof prepared by a qualified engineer, and approved by the
of Deep Foundations
agency requiring the test(s), may provide additional require-
D6026 Practice for Using Significant Digits in Geotechnical
ments and procedures as needed to satisfy the objectives of a
Data
particular test program.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1
ThistestmethodisunderthejurisdictionofASTMCommitteeD18onSoiland contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
RockandisthedirectresponsibilityofSubcommitteeD18.11onDeepFoundations. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Jan. 1, 2008. Published February 2008. Originally the ASTM website.
3
approved in 2002. Last previous edition approved in 2002 as D6760 – 02. DOI: The last approved version of this historical standard is referenced on
10.1520/D6760-08. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D6760 − 08
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This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D6760–02 Designation: D 6760 – 08
Standard Test Method for
Integrity Testing of Concrete Deep Foundations by
1
Ultrasonic Crosshole Testing
This standard is issued under the fixed designation D 6760; 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
1.1 This test method covers procedures for checking the homogeneity and integrity of concrete in a deep foundation such as
bored piles, drilled shafts, concrete piles or augercast piles. This method can also be extended to diaphragm walls, barrettes, dams
etc. In this test method, all the above will be designated “deep foundation elements.” The test measures the propagation time and
relative energy of an ultrasonic pulse between parallel access ducts (crosshole) or in a single tube (single hole) installed in the pile
or structure.deep foundation element. This method is most applicable when performed betweenin tubes that are installed during
pile construction.
1.2 Similar techniques with different excitation sources or single access ducts, or both, exist, but these techniques are outside
the scope of this test method.
1.3 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice
D 6026.
1.3.1 The method used to specify how data are collected, calculated, or recorded in this standard is not directly related to the
accuracy to which data can be applied in design or other uses, or both. How one applies the results obtained using this standard
is beyond its scope.
1.4
1.4 The method used to specify how data are collected, calculated, or recorded in this test method is not directly related to the
accuracy to which data can be applied in design or other uses, or both. How one applies the results obtained using this standard
is beyond its scope.
1.5 This standard provides minimum requirements for crosshole (or single hole) testing of concrete deep foundation elements.
Plans, specifications, provisions, or combinations thereof prepared by a qualified engineer, and approved by the agency requiring
the test(s), may provide additional requirements and procedures as needed to satisfy the objectives of a particular test program.
1.6 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of the standard.
1.7 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.8 Limitations—Proper installation of the access ducts is essential for effective testing and interpretation.The method does not
give the exact type of defect (for example, inclusion, honeycombing, lack of cement particles, etc.) but rather only that a defect
exists. The method is limited primarily to testing the concrete between the access ducts and thus gives little information about the
concrete outside the reinforcement cage to which the access ducts are attached when the tubes are attached to the inside of the
reinforcement cage.
1.5
1.9 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D 1143Test Method for Piles Under StaticAxial Compressive Load Practice for Fractography and Characterization of Fracture
Origins in Advanced Ceramics
D 3740Practice for Minimum Requirements for Agencies Engaged in the Testing and/or Inspection of Soil and Rock as Used
1
This test method is under the jurisdiction of ASTM Committee D18 on Soil and Rock and is the direct responsibility of Subcommittee D18.11 on Deep Foundations.
Current edition approved Jan 10, 2002. Published April 2002.
Current edition approved Jan. 1, 2008. Published February 2008. Originally approved in 2002. Last previous edition approved in 2002 as D 6760 – 02.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 04.08.volume information, refer to the standard’s Document Summary page on the ASTM website.
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