When to conduct pile load test
When to conduct pile load test
(OP)
Hi,
After pile driven into soil, when is the appropriate time to conduct the pile load test (maintained load test & pda test)
1. Is the resting period for skin friction and end bearing pile is different? I read that some suggesting straight away, some said 3 days, 2 weeks and even 1 month.
2. Will different type of soil affect the time for testing?
3. What about the bored pile?
Thank you
After pile driven into soil, when is the appropriate time to conduct the pile load test (maintained load test & pda test)
1. Is the resting period for skin friction and end bearing pile is different? I read that some suggesting straight away, some said 3 days, 2 weeks and even 1 month.
2. Will different type of soil affect the time for testing?
3. What about the bored pile?
Thank you





RE: When to conduct pile load test
Here is one link. Note the text from which it comes.
http://www.pilebuck.com/foundation-manual-caltrans...
http://www.pilebuck.com/foundation-manual-caltrans...
RE: When to conduct pile load test
Practically, the sooner the better, so pile production can start.
For auger cast piles, we never waited more than 1 week.
If the contractor is pushing for a shorter wait time between installation and test, the test results will be conservative (everyone wins unless the test results are lower than expected).
RE: When to conduct pile load test
I have seen piles with fairly substantial relaxation so you should be cautious about assuming that the longer you wait the higher the capacity will be as this is not always true.
RE: When to conduct pile load test
The bored pile will be depending on the concrete strength to hold the maximum load.
RE: When to conduct pile load test
In what soil profiles do you see substantial relaxation beyond 7 days?
Is this demonstrated by full scale pile load tests, or just PDA, or both?
RE: When to conduct pile load test