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Can both Pile Drive Analyser PDA and Pile Integrity Test PIT be used for checking pile capacity?

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Pile Drive Analyser is a high-strain dynamic test to determine the force and velocity response of a pile to an impact force applied axially by a driving hammer at the pile top. It is applicable to driven piles or small diameter bored piles. The operation measures the elastic deformation of a pile after a hammer blow and is mainly used to check the ultimate capacity of piles. However, it may also be adopted to detect damages in pile body and obtain the friction profile along the pile shaft.

Pile Integrity Test is a low-strain dynamic test which involves the use of a small vibrator or a light hammer. It is applicable to small diameter driven concrete piles and large diameter bored piles. It can be used to check the following properties:

(i) Quality of concrete (e.g. honeycombing)
(ii) Location and type of damages
(iii) Estimation of pile length

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However, it is mainly used to check the integrity of piles only and it may be used to deduce the pile capacity.

This question is taken from book named – A Self Learning Manual – Mastering Different Fields of Civil Engineering Works (VC-Q-A-Method) by Vincent T. H. CHU.

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Comments
  • herath June 29, 2013 at 2:34 am

    how long do we need to wait after concreting of a bored pile to start PDA testing?

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