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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Alternatively, velocity or displacement transducers may be used to obtain velocity data, provided they are equivalent in performance to the speci?
The apparatus should be capable of averaging data of several blows to reinforce the repetitive information from soil and pile effects while reducing random noise effects. Such further use and interpretation of the data is a matter of engineering judgment and experience. 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. 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.
Piles with highly variable cross sections or multiple discontinuities may be difficult to evaluate. Sstm of this test method are cautioned that compliance with Practice D does not in itself assure reliable results.
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 foundation piles, regardless of their method of installation provided that they are receptive to low strain impact testing.
Set up the apparatus for recording, reducing, and displaying data so that it is operational and the force and velocity signals are zeroed. The force output shall be balanced to zero between impact ast.
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. In some cases, it may be difficult to distinguish the soil response from the pile response.
The uniformity and accuracy of the digital sampling frequency is critical; the clock jitter sampling frequency accuracy must be within 0. A number in parentheses indicates the year of last reapproval.
Also, the test may identify minor impedance variations that may not affect the bearing capacity of the pile. Last previous edition D — Current edition approved November 10, Accelerometers shall be linear to at least 50 g.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? 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.
A typical schematic arrangement for this apparatus is illustrated in Fig. Attached to every digitized event should be identifying information names and descriptions, signal processing enhancement parameters, and date and time stamps.
Precision and Blas 8. A hammer with a very hard plastic tip can induce a short input force pulse without causing local pile damage. No other units of measurement are included in this standard.
This standard does not purport to address all of the safety concerns, if ashm, associated with its use. Analog data acquisition systems are speci?
ASTM D5882 – 16
If the pile head is contaminated, remove a sufficient pile section to reach sound concrete. The apparatus shall allow for a permanent graphical output of the records.
s This standard may involve hazardous materials, operations, and equipment. Use integrity evaluation from low strain tests together with other information, including pile installation procedures and observations, soil information, loading requirements, etc.
This apparatus may receive the signals after they have been processed by the apparatus for reducing the data.
ASTM D – 16 Standard Test Method for Low Strain Impact Integrity Testing of Deep Foundations
When aztm, the sample frequency, therefore, shall be at least 30 Hz each for the motion sensor and the optional instrumented hammer, if used. The results of the analysis may include a quantitative assessment of pile integrity.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. How one applies the results obtained using this standard is beyond its scope. The low strain integrity evaluation should not be used as the sole factor in establishing pile acceptance or rejection. For both methods, data may be evaluated in both time domain and frequency domain. Historical Version s – view previous versions of standard.
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.