The Study Of Working Mechanism And Application Of Isolation Pile

City buildings in soft soil area-intensive areas,deep excavation pit,easily lead to uneven settlement around deep excavation,while neighboring buildings also occurs uneven settlement and tilt produce severe wall larger cracks affect the use and safety of the building.Deep excavation process underway isolated pile set to control the influence of the surrounding environment and to protect adjacent buildings,has become a new protective measures.This paper analyzed research work focused on the mechanism of isolated pile and its practical effect applications.Thesis theoretical research and numerical simulation FLAC3 D,combined with practical engineering cases,analysis and research,its main work are:(1)theoretical analysis of the mechanism isolated pile first start working for;according to the surrounding soil during excavation of deep excavation unloading deformation caused by the settlement as well as some isolated pile of relevant literature analyzes the working mechanism of isolation pile.(2)consider application isolation pile preconditions and certain basic assumptions,based on design concepts and design principles,engineering practices and norms pile,isolated pile made more practical and reliable method of internal force calculation structure.(3)Considering the Poisson's ratio u to characterize soil lateral deformation and vertical deformation of the relationship,while supporting structure lateral displacement reaction is a lateral strain of soil,based on the Poisson's ratio u and the ground loss method proposes a concept more safe and reliable surface settlement estimation method.(4)using numerical software FLAC3 D effect isolated pile protect the adjacent buildings were simulated and analyzed.Research on the isolated pile of pile length,arrangement position,structure,pile spacing four factors to control the deformation of the impact and effect analysis of cohesion,internal friction angle,pile length,pile diameter,pile position and other factors on the reasonable pile the sensitivity of the pitch,put forward the principle of setting the isolation pile and method of determining the reasonable pile space.(5)Finally Projects numerical analysis and theoretical calculations and the building adjacent to the Settlement Monitoring Data were compared to verify the pile in isolation to protect the safety of surrounding buildings engineering results.