This is an interesting lecture. At 56mins, there appears to be reasonably good correlation between the test piles and the shortest piles. I was wondering whether the shortest piles in a group were the early piles driven in that group and perhaps the longer piles were the latter piles driven within a group. If so, it may be that there is some group effect at play here that is not apparent from an individual test pile.
This is an interesting lecture. At 56mins, there appears to be reasonably good correlation between the test piles and the shortest piles. I was wondering whether the shortest piles in a group were the early piles driven in that group and perhaps the longer piles were the latter piles driven within a group. If so, it may be that there is some group effect at play here that is not apparent from an individual test pile.