Study On Deep Foundation Deformation Features Of Baoer Station In Qingdao Metro

With the rapid development of urban subway project, the subway deep excavation dig deeper, at present, the depth of subway foundation is basically more than 20m. Pit depth deepened virtually increased the difficulty of construction, and integrated deep excavation of nearly related to the geotechnical engineering disciplines. Metro station general is located in the downtown area excavation, surrounding buildings dense, distortion control and ensure the stability of this excavation around the building made high demands. If improper construction methods, support is not timely or unreasonable, therefore appreciate the surrounding soil instability, tilt, cracking, the situation is serious, it will collapse occurs, resulting in serious economic losses. Therefore, the study of deformation characteristics of subway foundation is of great significance.Based on actual project Qingdao Metro Baoer station, first through theoretical analysis, various forms of research excavation instability and numerical simulation of the foundation pit construction process enclosure wall and surface deformation law, obtain pit deformation the calculated values, and through on-site monitoring method, the deformation of the pit and the numerical results are compared and analyzed to verify. Specific research carried out several of the following areas:(1) analyzed the basic theory of deep deformation and deformation mechanism to provide the theoretical basis for the study of deformation characteristics of excavation, it provides a theoretical basis for the subsequent numerical simulation.(2) by means of ABAQUS finite element modeling software, numerical calculation using Flac3d Software Foundation Deformation. By numerical calculation, to obtain the amount of deformation and deformation pit.(3) Monitoring data through the research field, summarizes deep excavation site monitoring methods and data analysis. Comparison of simulated deformation and field monitoring data, analysis subway foundation deformation characteristics, summarized subway foundation deformation law.