Study On Compacting Effects Of Jacked Pile And Its Prevention

The obvious compacting effects caused by the penetration of jacked pilemay have severe influence on the implementation of the project andsurrounding engineering environment, so it’s significant for studying oncompacting effects of jacked pile and its prevention. In this paper, the currentresearch and the key problem about compacting effects caused by jacked pilewill be described firstly, based on the analyses theory of compacting effects,the main work in the dissertation is arranged as follows:Firstly, in order to emulate the single pile process more veritably, a2dsymmetric model, which consider the finite deformation, the nonlinear contact,the elasto plastic constitutive relationship and the consuming computer time,is established by applying cavity expansion theory and finite differencemethod.Secondly, based on FLAC3D Lagrange differential program, thedisplacement and stress field of soils with the different depth of jacked pile,the displacement field under the different soil parameters (cohesion, internalfriction Angle, the elastic modulus and Poisson ratio) can be analyzed byusing this model.Thirdly, the impact of the surrounding environment caused bycompacting effect of jacked pile is analyzed, the normal measures to reducethe compacting effect in design and construction stage are provided, and theprinciples, characteristics, guiding significance in engineering case areproposed.