Study On The Deformation Of Subway Station Excavation Of Chaoyang Park

Since reform and opening up, China’s rapid economic development and openpopulation policy lead to increasing urban population. Traffic pressure is bigerbecause of urban development. It is necessary to build subway in the limited groundspace in order to solve the traffic congestion. Digging on the surface of ground is apart of the subway construction, so it plays a vital role in the stability and thesurrounding environment.The study on deformation of pit becomes a hot researchtopic for many scholars.Through analyzing deep pit deformation mechanism subway station, the authorof paper concludes various factors affecting the deformation of deep pit, including thedamage form to pit, construction plan, palisade structure form and soil properties. Andthen the author of paper analyzes carefully engineering monitoring scheme, andsummarizes monitoring data of the engineering practice. Through analyzing thesurface subsidence data of the pit surrounding environment, palisade structure andsteel support axial forces of the tilt data, the paper concludes the general deformationrule of pit.With the development of computer technology in the21st century, numericalsimulation is widely used in engineering field. The author of paper simulatesChaoyang park subway excavation process with FLAC3D finite difference software.FLAC3D finite difference software uses explicit Lagrangian algorithm and mixeddiscrete method, which can solve a wide range of dimension geotechnical soil withsmaller memory. During simulation of deep foundation pit excavation in this project,four step-by-step excavations are adopted to analyze the stress and displacement ofsurrounding soils of foundation pit. Supporting after excavation is the way in eachstep of excavation simulation. The next step is the analysis of horizontal and verticalstress and displacement. The last step is to compare and analyze the simulation resultsand monitoring results to verify the monitoring rule of the pit deformation. The purpose of the paper is to provide rational data basis for the similar projects.