Abstract
In order to establish the limit state design method for pile foundations, it is necessary to develop the adequate analysis method that can fully express the ultimate behavior of pile foundations. Although several analysis methods for pile foundations have been proposed, mainly on the basis of small-scale model tests, the behavior of pile foundations is considered to be significantly influenced by the scale effect, the pile group effect, horizontal spacing of piles and so on. Authors executed the lateral loading test using the full-scaled 3-by-3 pile foundation with 1.2m of diameter, and traced its critical behavior up to the ultimate limit state. Based on the test results, the applicability of the nonlinear analysis model, considering both of soil reaction and M-φ properties of each pile, was precisely examined. And finally the design constants of nonlinear ground reaction characteristics were discussed including the past test results.
