Numerical Simulation Application Of Deep Foundation Pit Support Based On FLAC3D

With the acceleration of the pace of urban modernization,the number of urban populations continues to increase,and urban architecture begins to develop at a higher and deeper level.In the city,more and more high-rise buildings,super high-rise buildings,subways,underground parking lots,underground supermarkets,etc.were built,which led to the emergence of deep foundation pit engineering.Research on foundation pits has been around for a long time.The highest standard for testing the technical ability of each engineering technician is to be able to select a suitable and reasonable foundation pit support scheme and construction excavation method according to local conditions.This paper relies on the deep foundation pit project of the Metro Museum Station of Metro Line 1 of Hohhot City.The finite difference software FLAC3 D is used to carry out numerical simulation calculation for each stage of deep foundation pit excavation,combined with actual monitoring data on site.The characteristics of the deep foundation pit supporting structure,supporting axial force and surrounding surface settlement deformation are analyzed.The study found that the deformation curve of the underground continuous wall of the supporting structure caused by the excavation of the deep foundation pit is a "bow-shaped" forming form,and the surrounding ground deformation curve is a "funnel-shaped" forming form.The numerical simulation results are different from the actual monitoring data,but the overall trend is basically the same,indicating that the numerical simulation of deep foundation pit excavation has a certain prediction effect.Combined with the actual monitoring work on site,it can better guide the construction.The deep foundation pit support scheme and the deep foundation pit excavation method are reasonable and feasible,and have certain reference value for similar projects in the region in the future.