Veja grátis o arquivo ASTM D (Low Strain Impact Integrity Testing) enviado para a disciplina de Fundações Categoria: Outros – ASTM D compliance statement of PET – Pile echo tester. ASTM D – 07(). Standard Test Method for Low Strain Impact Integrity Testing of Deep Foundations. This standard is a part of ASTM Book of Standards .
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D — 07 Standard Test Method for Low Strain Impact Integrity Testing of Deep Foundations1 This standard is issued under the fixed designation D ; 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.
This test method is applicable to long structural elements that function in a manner similar to any deep foundation units such as driven piles, augeured piles, or drilled shaftsregardless of their method of installation provided that they axtm receptive to low strain impact testing. These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the standard.
No other units of measurement are included in this standard. How one applies the results obtained using this standard is beyond its scope.
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 deter- mine the applicability of regulatory limitations prior to use. NOTE 1—he quality of the result produced by this test method is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used.
Users of this test method are cautioned that compliance with Practice D does not in itself assure reliable results. 5d882-07
Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors. Significance and Use 4. Current edition approved May 1, Originally approved in Last previous edition approved in as D — The method works best on solid concrete sections, and d58882-07 limited application to unfilled steel pipe piles, H piles, or steel sheet piles. These data assist evaluation of pile integrity and pile physical dimensions that is, cross-sectional area, lengthcontinuity, and consistency of the pile material, al- though evaluation is approximate and not exact.
This test method will not give information regarding the pile bearing capacity. The time domain record is then evaluated for pile integrity. The data are evaluated usually in ast frequency domain. A hammer with a very hard plastic tip can induce a short input force pulse without causing local pile damage. The impact should be applied axially to the pile normally on the pile head.
The accelerometer s should be placed at or near the pile head and shall have their sensitive axis parallel with the pile axis. Accelerometers shall be linear to at least 50 g.
Alternatively, velocity or displacement transducers may be used to obtain velocity data, provided they are equivalent in performance to the specified accelerometers. If damage is suspected during use, recalibrate or replace the accelerometer.
The hammer may have a force load cell between the tip and hammer body. Alternatively, the hammer may have an.