During construction the pile head (pile cut-off) was not adequately checked from site supervision. Concerns over the following items remain: - Inadequate (locally no) concrete cover to reinforcement (ca.3%) and/or poor quality concrete close to pile head (upper 1-5m) outside the rebar cage. - Construction joints pile head to pile cap are not cleaned/prepared adequately.
A) How could the pile group behave (- considering inadequate construction methods applied-) during large lateral forces/moments e.g induced by earthquakes (Magnitude is up to 7) ?
B) What affect have the defective pile(s) in compression, what in tension ? (Lack of concrete outside the reinforcement cage)
C) What affect has a potential liquefaction in the level of pile head - pile cap ? (I guess rotation - but to what significance?)
D) Long-term durability consoiderations ?
E) What possibilities do I have in order to proof - in case of doubts - that there are no defects around the pile head (after the pile cap is casted) ? Sonic tests just give information within the rebar-cage. Any other methods ? Or is the problem not significant enough (except the durability concern) ?
Thanks for your kind effort and help. I appreciate it.