Study On Interaction Mechanism Of Lateral Pile Subjected To Surcharge Load

Geotechnical engineers are often required to either assess the lateral response of existing piles caused by adjacent settling approach embankment, pile driving operations, excavation operations, tunneling operations, moving slopes or landslides, and so on, or to design piles to stabilize unstable slopes or potential landslides. Piles may become of no use, which are referenced to passive piles and frequently subjected to the soil movements due to surcharge loads inducing bending moments and deflections in the piles in many engineering practice cases, such as dock, bridge abutments, industry workshop. And this may lead to their superstructure distress or failure.The problem of piles subjected to lateral soil movements has become a subject of considerable research work. However, great uncertainties still remain in relation to the theoretical solutions for estimation the piles response. So it is significant to study the behavior of passive piles. In this research thesis, firstly research background and a review is presented on the existing available literature including subjects of soil pressure on passive piles, the styles of soil movements, the calculation and analysis methods. Secondly, a geotechnical finite-difference method analysis software package, FLAC5.0 is used to model the pile-soil interaction response around the passive piles. Finite-difference method is also used to simulate the behavior of piles subject to the soil movements due to surcharge loads under the various influencing factors such as pile space, soil properties, and so on. At last, some advice and suggestion are developed for further research and practical project, and the problems requiring further studies are discussed.