Abstract
So-called pile driving formula is nothing but a conventional approach for quick estimation of the bearing capacity of a driven pile, therefore, that how closely the bearing value estimated by a formula is correlated to that determined by the loading test must be a criterion for judging the applicability of each pile driving formula. Under this concept, our Sub-Committee has first worked to compile as many data as possible containing both driving and load-test records and, then, dealt with thus compiled data with respect to 250 piles in a statistical manner, leading to a conclusion that, among 28 formulas proposed so far, Engineering News formula R=0.20 W_HH/(S+0.02) holds the highest applicability regardless of properties of the soil into which the pile is driven.
