Research on deformation characteristics of piled-raft foundation subjected to vibration load

It is observed in the past case history that railway settlement due to the cyclic train loading in piled-raft may give rise to huge problem to the operation of high-speed train. As the traditional methods, such as empirical methods or numerical simulation based on primitive constitutive models, are unable to interpret properly the settlement mechanism, systematic investigation on this issue is necessary. In this paper. settlement of piled-raft foundation subjected to cyclic loading is investigated by model tests and numerical analyses. Vibration model tests on piled-raft foundation in Ig condition are conducted. Meanwhile, based on a sophisticated constitutive model, three-dimensional dynamic analyses with finite element method are also conducted to investigate the mechanism of the settlement of the piled-raft foundation. Both the model tests and the numerical analyses are conducted in real time sequential condition, without adding any empirical or averaging factor.