How to check actual height of pile as constructed
How to check actual height of pile as constructed
(OP)
Hi Geotechnical experts,
We have a situation on our site that we suspected the actual height of pile is not as per the design. The integrity test report was submitted but doesn't specify that the height was actually checked other than the integrity of the piles. I have searched that there is a certain calculation to determine the actual height of pile based on the velocity and time as per the actual test carried out. Can anyone clarifies my doubts and unselfishly share his knowledge. Thank you in advance.
We have a situation on our site that we suspected the actual height of pile is not as per the design. The integrity test report was submitted but doesn't specify that the height was actually checked other than the integrity of the piles. I have searched that there is a certain calculation to determine the actual height of pile based on the velocity and time as per the actual test carried out. Can anyone clarifies my doubts and unselfishly share his knowledge. Thank you in advance.






RE: How to check actual height of pile as constructed
RE: How to check actual height of pile as constructed
Its a bore pile. Sorry to say that i was not really properly checked during construction. Actually, we are investigating it since it appears that the dowel bars are longer than height should be. The testing laboratory submitted the integrity test report but there is no calculation showing that the pile height is correct as required. instead only certifies he integrity of the file is okey.
Is there any formulation to counter check the actual height using the velocity and time obtained on the integrity test report?
RE: How to check actual height of pile as constructed
RE: How to check actual height of pile as constructed
RE: How to check actual height of pile as constructed
Jeff
Pipe Stress Analysis Engineer
www.xceed-eng.com
RE: How to check actual height of pile as constructed
Be advised that sometimes those tests can be somewhat inaccurate. (Because the reflection time is affected by the soil-pile interaction.) There has been a lot of talk (lately) about that new "EDAR" method. (I.e. that it is highly accurate.)
RE: How to check actual height of pile as constructed
RE: How to check actual height of pile as constructed
But for the meantime, may I ask anyone for an applicable calculation that I can use with the data given on the result such as the velocity, the time and the hertz of the integrity test.
RE: How to check actual height of pile as constructed
http://www.ndt.net/article/defektoskopie2009/papers/Rybak_Schabowicz-8.pdf
RE: How to check actual height of pile as constructed
Thank you very much. This paper you shared can be really a helpful to my investigation.
RE: How to check actual height of pile as constructed
I did some research over 20 years ago, along with one of my geotechnical colleagues, into a method of pile length determination using an electromagnetic field response. We wrote a paper on the technique that was published in the Deep Foundations Institute Conference Proceedings in 1996. Here is the citation on the paper:
Woods, W. Ronald and McIntosh, Kirk A.,"Electromagnetic Pile Length Determination", Proceedings of the Deep Foundations Institute, National Conference, October 1996.
The proceedings are available through the Deep Foundations Institute if you want to get it.
DFI would be another good source of info for your issue. Check their other publications.
RE: How to check actual height of pile as constructed