Settlement of reinforced region for composite foundation under loads of embankment in stratified soil

Provided that the neutral point of a pile is insensitive to the variance of elastic modulus for stratified soil, which is verified by finite element stimulation in the following section, analytical formulas of compressive quantity for pile and surrounding soil in reinforced region of composite foundation under embankment loads were derived along with the expressions for vertical stress of pile and surrounding soil, and shear stress of pile surrounding in each soil layer, by applying elasticity, compatibility of pile-soil displacement and boundary conditions. Comparison between results of the calculation approach and those of finite element and in situ measurements indicates that a good agreement for the deformation of pile and surrounding soil within the precision tolerance of engineering computation is obtained. This work will benefit the settlement analysis for cases in similar stratified soil.