Enclosure Monitoring And Numerical Simulation Of Deformation Of Deep Underground Excavation

Deep Pit Retaining Structure Design and Deformation Law is one of the subway station construction in hot and difficult problems, conducted Deformation of Deep Foundation Pit important engineering application value. The subway station is usually built in areas with heavy traffic, dense buildings, underground pipelines complex urban downtown area and traffic area. How to effectively control the deformation so that excavation pit both safe and economical, is that people have been exploring the subject. On the basis analysis of the excavation pit stability analysis theory, Shenyang subway deep excavation of a background against deformation during excavation retaining structure were analyzed. And in conjunction with FLAC 3D finite difference software actually works on the horizontal displacement step in the process of excavation retaining structure, steel support shaft force and pile top horizontal displacement is analyzed, while Lizheng Deep Foundation F-SPW FLAC 3D software and software to calculate the results were compared, and binding assays deep Station Foundation actual monitoring data, focused on the stage of excavation pit in the enclosed structure, steel support axial force change, pile horizontal displacement analysis of changesDeep Pit Retaining Structure Design and Deformation Law is one of the subway station construction in hot and difficult problems, conduct Deformation of Deep Foundation Pit important engineering application value. The subway station is usually built in areas with heavy traffic, dense buildings, underground pipelines complex urban downtown area and traffic area. How to effectively control the deformation so that excavation pit both safe and economical, is that people have been exploring the subject. On the basis analysis of the excavation pit stability analysis theory, Shenyang subway deep excavation of a background against deformation during excavation retaining structure were analyzed.Firstly, each monitoring project to collate and summarize the data variation envelope and horizontal displacement axial force change characteristic steel support Deep Foundation Pit Construction. Then analyzes the excavation phase, the monitoring indicators appear maximum position, stability analysis and research stage of excavation. After analysis, the envelope pile horizontal displacement, steel support axial force and horizontal displacement of the pile bearing capacity can meet regulatory requirements, excavation in a safe state.By FLAC 3D numerical simulation analysis shows that the greatest deformation envelope pile located in the lower part of the excavation section, when the excavation depth smaller prestressing steel support has not been set, envelope pile with boom horizontal deformation similar pile envelope deformation when the maximum horizontal displacement occurs in top of the pile. By using Lizheng F-SPW deep excavation retaining structure calculation software for deep foundation pit stop of stability analysis and calculation, the results are in line with regulatory requirements, the results of numerical simulation results obtained with the comparative analysis of the two calculation results agree good, and the actual project monitoring results comparison, displacement pile analog value is greater than its envelope found, other simulated data with real data basically. And displacement pile retaining structure in good condition, structural design reasonable and row piles retaining structure can better meet the subway deep excavation safety, reasonable request.Deep Pit Retaining Structure Design and Deformation Law is one of the subway station construction in hot and difficult problems, conduct Deformation of Deep Foundation Pit important engineering application value. The subway station is usually built in areas with heavy traffic, dense buildings, underground pipelines complex urban downtown area and traffic area. How to effectively control the deformation so that excavation pit both safe and economical, is that people have been exploring the subject. On the basis analysis of the excavation pit stability analysis theory, Shenyang subway deep excavation of a background against deformation during excavation retaining structure were analyzed.