Theoretical analysis of soil squeezing effect due to jacked piles based on variation principle

The construction of jacked piles is a widely-used technique of pile engineering at present.The job practices have many merits,but many theoretical and practical problems still need to be solved.A model of soil squeezing due to jacked piles is established considering the effect of the final shape and the displacement boundary of pile wall,the stress free ground surface,the finity of pile length and the non-linearity of soil materials.The soil displacement,strain and stress solutions are obtained based on the variation principle.Finally,comparisons are made to prove the reasonability of the solutions using the passive soil pressure theory,the classical CEM results and the ANSYS analysis results.