PIT :- "Piles Integrity Test"
A pile integrity test is done to ensure such defects are not there.
A defective pile would not carry the desired load, and may lead to catastrophic failure of the superstructure. each and every piles tested. But that is costly.
Hence 5–10% of the total number is tested, at critical locations.
If a failure is detected. More tests are done.
If a pile fails in this test, load testing is done to ascertain the load bearing capacity, and the pile layout is amended accordingly.
New piles are made of required.
this is done before casting the pile cap.
Note:-Piles being underground, visual inspection for flaws in concrete like honeycomb, gaps, fissures etc. cannot be done.
