Metro Shield Construction Surface Subsidence Monitoring And Control

With the continuous improvement of the shield machine, Shield tunnel construction technology is also developing rapidly.Shield tunnel construction compared with other tunnel construction method faster construction schedule, construction safety, as well as construction intelligence advantages, And has a very broad prospects for the geotechnical field, It's currently the main construction method for urban subway systems in China. Cause surface subsidence is inevitable, if the settlement had serious consequences for the General Assembly to the tunnel construction, threatening the construction of surrounding buildings, the safety of the underground pipeline, resulting in huge economic losses and social impacts due to shield tunnel construction.Subject to the Beijing Subway Line10, two05tenders dahongmen Station-corner gate, Eastern and shield construction engineering background scene, a large number of settlement monitoring data through research and analysis, depth of Tunnel Excavation by surface longitudinal, transverse settlementlaw, and with FALC3D procedures for data simulation of the construction process, the simulation analysis of shield construction on the surrounding strata, as well as the stress changes. The field monitoring data and simulation data are basically consistent with the model of the engineering-compliance with conditions, a reasonable construction parameter optimization.The subject from the advance of the shield machine, digging the soil surface pressure, segment assembly, Grout and secondary grouting to the study, summed up the shield construction, surface subsidence caused by major construction control measures, optimization of the relevant construction parameters, and obtained the best advance of the shield machine state and provide a reference for the future in similar strata shield tunnel construction.