Pullout behaviour of model pile and helical pile anchors subjected to lateral cyclic loading

This paper presents the effect of lateral cyclic loading on the pullout capacity of model and helical piles in clayey soil. Reduction in pullout capacity mainly depends upon the lateral deflection of the pile during cyclic loading and the embedment ratio of the pile. This reduction in the pullout capacity of model piles is presented in terms of nondimensional parameters. However, in the case of helical piles under similar conditions, it was found that the lateral cyclic loading has very little influence on the pullout capacity. The reasons for the better performance of helical piles over ordinary piles are explained. -from Authors