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ASTM D 5882 PDF

Buy ASTM D R TEST METHOD FOR LOW STRAIN IMPACT INTEGRITY TESTING OF DEEP FOUNDATIONS from SAI. ASTM D compliance statement of PET – Pile echo tester. Standard Test Method for Low-Strain Impact Integrity. Testing of Deep Foundations (ASTM D ), and. Standard Test Method for High-Strain Dynamic.

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Such further use and interpretation of the data is a matter of engineering judgment and experience. The hammer must be tuned such that the fourrier transform of the measured force shall have a smooth spectrum, without any local peaks.

ASTM D[1][1] pile integrity testing._百度文库

Piles that are rigidly connected to a footing or superstructure are sometimes tested successfully although the evaluation often may be more difficult and may be inconclusive. The apparatus shall display the digitized data of the impact event or upon recall by the user of the digitally stored event.

Historical Version s – view previous versions of standard. A superscript epsilon e indicates an editorial change since the last revision or reapproval.

The motion sensor is placed generally near the center of the pile. These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

The method is generally not suitable for testing steel sheet, H-section or un? The apparatus shall be able to aztm increasing intensity ampli? The hammer may have a force load cell between the tip and hammer body. The apparatus 582 be capable of averaging data of several blows to reinforce the repetitive information from soil and pile effects while reducing random noise effects. Also, the test may identify minor impedance variations that may not affect the bearing capacity of the pile.

The low strain integrity evaluation should not be used as the sole factor in establishing pile acceptance or rejection. Historical Version s – view previous versions of standard Translated Version s: Alternately, the pile head force can be measured as well.

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ASTM D 5882-16 Compliance Statement

Integrity evaluation of a pile section below a crack that crosses the entire pile cross-sectional area or a manufactured mechanical joint is not normally possible since the impact wave likely will re? The displayed data should include the velocity and force optional records with time, an indication of the pile length and assumed material wave speed and a representation of the shape and magnitude of the ampli? 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.

Ensure that the apparatus is capable of displaying the signal from each selected blow for a minimum period of 30 s. If the pile head is contaminated, remove a sufficient pile section to reach sound concrete. The accelerometer s should be placed at or near the pile head and shall have their sensitive axis parallel with the pile axis.

For piles having minor impedance variations, the engineer should use judgement as to the acceptability of these piles considering other factors such as load redistribution to adjacent piles, load transfer to the soil above the defect, applied safety factors, and structural load requirements.

Link to Active This link will always route to the current Active version of the standard. A number in parentheses indicates the year of last reapproval. Often, this method gives sufficient information for integrity evaluation.

The apparatus shall allow for a permanent graphical output of the records. In the time domain analysis PEMbase the pile integrity evaluation on relative increases and decreases of velocity after the initial impact pulse Fig.

ASTM D – 16 – Standard Test Method for Low Strain Impact Integrity Testing of Deep Foundations

Originally published as D — If records are not repeatable, do not use the data. Attach the appropriate motion sensor see 5. The apparatus shall balance the velocity signal to zero between impact events. If only the individual impacts are recorded, ensure that the apparatus for recording, reducing, and displaying data is capable of averaging up to 10 individual records. The apparatus shall include a graphic display of velocity and force optionaland a data storage capability for retrieving records for further analysis.

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ASTM D5882 – 16

Position the apparatus for applying the impact force so that the impact is applied axially with the pile and at a distance no larger than mm from the accelerometer.

Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters.

This data assists evaluation of pile integrity and pile physical dimensions that is, cross-sectional area, lengthcontinuity, and consistency of the pile material. Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors. Average the suitable records of several impacts and apply necessary ampli?

Use integrity evaluation from low strain tests together with other information, including pile installation procedures and observations, soil information, loading requirements, etc. 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. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may ast.

ASTM D[1][1] pile integrity testing. It asmt 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. The time domain record is then evaluated for pile integrity. If damage is suspected during use, recalibrate or replace the accelerometer.

The results of the analysis may include a quantitative assessment of pile integrity. Active view current version of standard.

This standard does not purport to address all of the safety concerns, if any, associated with its use. When digitizing, the sample frequency, therefore, shall be at least 30 Hz each for the motion sensor and the optional instrumented hammer, if used.