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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If the pile head is not accessible, as when already integral with the structure, the sensor s may be attached to the side of the pile shaft.
ASTM D5882 – 16
Ensure that the apparatus for recording, reducing, and displaying data is capable of determining the measurement device overload threshold. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
NOTE 1—It is generally recommended that all components of the apparatus for obtaining dynamic measurements and the apparatus for recording, reducing, and displaying data be calibrated if any signs of system malfunctions become apparent. The motion sensor is placed generally near the center of the pile. A hammer with a very hard plastic tip can induce a short input force pulse without causing local pile damage.
This standard may involve hazardous materials, operations, and equipment.
Users of this test method are cautioned that compliance with Practice D does not in itself assure reliable results. Record the number of impacts for a speci? Attached to every digitized event should be identifying information names and descriptions, signal processing enhancement parameters, and date and time stamps.
The hammer must be tuned such that the fourrier transform of the measured force shall have a smooth spectrum, without any local peaks. Link to Active This link will always route to the current Active version of the standard. Historical Version s – view previous versions of standard.
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.
If necessary, prepare small areas by a hand grinder to provide a smooth surface for motion sensor attachment and impact. If the cause of poor data is not a motion sensor attachment problem but rather is found to be a transducer malfunction, repair or recalibrate it before further use. No other units of measurement are included in this standard. The method is generally not suitable for testing steel sheet, H-section or un? Users of this test method are cautioned that compliance with Practice D does not in itself assure reliable results.
No other units of measurement are included in this standard.
If records are not repeatable, do not use the data. Historical Version s – view previous versions of standard Translated Version s: The method works best on solid concrete sections, and has limited application to unfilled steel pipe piles, H piles, or steel sheet aatm. How one applies the results obtained using this standard is beyond its scope.
A superscript epsilon e indicates an editorial change since the last revision or reapproval. 8582 the suitable records of several impacts and apply necessary ampli? Piles with highly variable cross sections or multiple discontinuities may be difficult to evaluate.
Ensure that the pile head surface is accessible, above water, and clean of loose concrete, soil or other foreign materials resulting from construction.
The combination of force and velocity may give additional information regarding the pile integrity near the pile head.
ASTM D pile integrity testing._百度文库
The apparatus shall include a graphic display of velocity and force optionaland a data storage capability for retrieving records for further analysis. Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors.
The low strain integrity evaluation should not be used as the sole factor in establishing pile acceptance or rejection. Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors. The apparatus shall balance the velocity signal to zero between impact events.
Link to Active This link will always route to the current Active version of the standard. In the time domain analysis PEMbase the pile integrity evaluation on relative increases and decreases of velocity after the initial impact pulse Fig. This standard does not purport to address all of the safety concerns, if any, associated with its use.
Originally published as D — This data assists evaluation of pile integrity and pile physical dimensions that is, cross-sectional area, lengthcontinuity, and consistency of the pile material.
Attach the appropriate motion sensor see 5.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? The records from the individual impacts or the averaged record, or both, should then be stored see 5.
Some cases involving integral superstructures, may require use of aastm motion measuring devices attached at two different locations along the pile shaft. The uniformity and accuracy of the digital sampling frequency is critical; the clock jitter sampling frequency accuracy must be within 0. Active view current version of standard. Precision and Blas 8. Adjust the apparatus to reproduce a signal having a range of duration between 2 ms and 30 ms.
Your comments are 5882 either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters.
This standard does not purport to address all of the safety concerns, if any, associated with its use. Take, record, and display a series of velocity and force optional measurements. For piles with diameters larger than mm, attach the accelerometer at a minimum of three locations so that an integrity evaluation near the pile head may be made for each localized section of pile.
ASTM D – 07 Standard Test Method for Low Strain Impact Integrity Testing of Deep Foundations
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. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are 8582 provided as part of the standard. Also, the test may identify minor impedance variations that may not affect the bearing capacity of the pile.
How axtm applies the results obtained using this standard is beyond its scope.