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.
|Published (Last):||15 July 2015|
|PDF File Size:||3.42 Mb|
|ePub File Size:||6.51 Mb|
|Price:||Free* [*Free Regsitration Required]|
In some cases, it may be difficult to distinguish the soil response from the pile response.
In the time domain analysis PEMbase the pile integrity evaluation on relative increases and decreases of velocity after the initial impact pulse Fig.
The motion during the impact event is normalized usually and is associated with 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. Historical Version s – view previous versions of standard Translated Version s: Alternatively, the hammer may have an accelerometer attached and the measured acceleration may be converted to force using the hammer mass.
Precision and Blas 8. The uniformity and accuracy of the digital sampling frequency is critical; the clock jitter sampling frequency accuracy must be within 0.
When digitizing, the sample frequency, therefore, shall be at least 30 Hz each for the motion sensor and the optional instrumented hammer, if used. Users of this test method are cautioned that compliance with Practice D does not in itself assure reliable results. 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.
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. 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 asstmregardless of their method of installation provided that they are receptive to low strain impact testing.
These limitations must be understood and taken x FIG. Link to Active This link will always route to the current Active x of the standard. The apparatus shall display the digitized data of the impact event or upon recall by the user of the digitally stored event.
If necessary, prepare small areas by a hand grinder to provide a smooth surface for motion sensor attachment and impact. This test method is applicable to long structural elements awtm function in a manner similar to foundation piles, regardless of their method of installation provided that they are receptive to low strain impact testing.
The hammer may have a force load cell between the tip and hammer zstm. This standard does not purport to address all of the safety concerns, if any, associated with its use. No other units of measurement are included in this standard. For piles with diameters awtm 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 5882-16 Compliance Statement
Average the suitable records of several impacts and apply necessary ampli? It is generally helpful to consider the soil profile, construction method and site records when evaluating data obtained by this method. Adjust the apparatus to reproduce a signal having a range of duration e 2 ms and 30 ms. 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. The low strain integrity evaluation should not be used as the sole factor in establishing pile acceptance or rejection.
ASTM D5882 – 16
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. These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the standard. This test method will not give information regarding the pile bearing capacity.
Users of this standard are expressly advised atm determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. If records are not repeatable, do not use the data. X limitation may apply to long or highly variable piles or piles in soils that exhibit relatively high friction. Attach the appropriate motion sensor see 5.
Other ast 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.
Users of this test method are cautioned that compliance with Practice D does not in itself assure reliable results.
This standard may involve hazardous materials, operations, and equipment. Historical Version s – view previous versions of standard.