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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The apparatus shall include a ast, display of velocity and force optionaland a data storage capability for retrieving records for further analysis. 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.
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. Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors. Attached to every digitized event should be identifying information names and descriptions, signal processing enhancement parameters, and date and time stamps.
These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the standard.
Accelerometers shall be linear to at least 50 g. Also, the test may identify minor impedance variations that may not affect the bearing capacity of the pile.
Users of this test method are cautioned that compliance with Practice D does not in itself assure reliable results. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Ensure that the pile head surface is accessible, above water, and clean of loose concrete, soil or other foreign materials resulting from construction.
Other useful information to consider and compare with results of this test includes low strain integrity test results of similar piles at the same site, concrete cylinder or core strength test results, automated monitoring data on equipment placing the concrete when augered piles are used, or information obtained from crosshole sonic logging Test Method D or thermal integrity profiling Test Methods D if available. This test method is applicable to long structural elements that function in a manner similar to foundation piles, regardless of their method of installation provided that they are receptive to low strain impact testing.
These data assist evaluation of the pile cross-sectional area and length, the pile integrity and continuity, as well as consistency of the pile material, although evaluation is approximate.
These limitations must be understood and taken into FIG. The apparatus shall allow for a permanent graphical output of the records. Average the suitable records of several impacts and apply necessary ampli? This standard does not purport to address all of the safety concerns, if any, associated with its use.
Consistent records are the result of uniform impacts on sound concrete, transducer systems that are properly functioning, motion sensors that are?
The records from the individual impacts or the averaged record, or both, should then be stored see 5. Use integrity evaluation from low strain tests together 5828 other information, including pile installation procedures and observations, soil information, loading requirements, etc.
Alternately, the pile head force can be measured as well.
Integrity evaluation of a pile section below a crack that crosses the entire pile cross-sectional area or astmm manufactured mechanical joint is not normally possible since the impact wave likely will re? A contingency plan should be formed that allows the engineer to possibly perform further tests or dictate pile repair or replacement prior to the integrity testing, in case a serious defect is indicated. Comparison of results from several piles from the site with similar construction is recommended to assess the typical response with the same ampli?
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters. ASTM D pile integrity testing. 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.
ASTM D – 07 Standard Test Method for Low Strain Impact Integrity Testing of Deep Foundations
The motion sensor is placed generally near the center of the pile. The apparatus shall balance the velocity signal to zero between impact events. 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.
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 are receptive to low strain impact testing.
For both methods, data may be evaluated in both time domain and frequency domain. Last previous edition D — Such further use and interpretation of the data is a matter of engineering judgment and experience. Adjust the apparatus to reproduce a signal having a range of duration between 2 ms and 30 ms. The method works best on solid concrete sections, and has limited application to unfilled steel pipe piles, H piles, or steel sheet piles.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
ASTM D5882 – 16
Ensure that the apparatus for recording, reducing, and displaying data is capable of determining the measurement device overload threshold. A superscript epsilon e indicates an editorial change since the last revision or reapproval. Link to Active This link xstm always route to the current Active version of the standard. 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.
ASTM D 5882-16 Compliance Statement
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. This data assists evaluation of pile integrity and pile physical dimensions that is, cross-sectional area, lengthcontinuity, and consistency of the pile material. The apparatus shall be capable of transferring all data to a permanent storage medium.
The apparatus must have?
This standard does not purport to address all of the safety concerns, if any, associated with its use. 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?
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. A typical schematic arrangement for this apparatus is illustrated in Fig. When digitizing, the sample frequency, therefore, shall be at least 30 Hz each for 55882 motion sensor and the optional aztm hammer, if used.
Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors. Alternatively, velocity or displacement transducers may be used to obtain velocity data, provided they are equivalent in performance to the speci? Historical Version s – view previous versions of standard Translated Version s: