Shieldclosecrossing Under The Existing Subway Shield Sector Project Case Research

In recent years, with the rapid development of rail transportation, large-scale, mo re and more subway construction will face many times through the existing metro line problem.According to the study, in the 2050 Beijing urban rail transit line plan, the number of nodes in the station and subway crossing section of up to 118. Because wear inevitablyprocess on the existing subway tunnel shield effect ca used by subsidence or uplift of the existing metro rail deformation and control standar ds are very strict, such as the Beijingsubway shield tunnel under the subway tunnel as "high grade project risk, so the real time monitoring the deformation trends and timely adjustment of the corresponding control measures, so as to guide the construction, to ensure the normal operation and safety operation of the tunnel is very necessary.Crossing the existed Metro Tunnel of Beijing metro shield tunnel, safety risk control inhigh grade. In the process of shield tunnel under the inevitable wear of the operating metro tunnel caused by impact, subsidence or uplift, there are potential risks. The super close distance Undercrossing subway shield tunnel project as the background, the research significance analysis of automatic monitoring data to reflect the real-timespecification of dynamic construction, research and explore the existing metro, new andtraditional monitoring means monitoring method, and com bining with the measured dataof Shield Crossing disturbance for quantitative analysis, discussion study on constructionparameters and related control measures, thr ough the measured data of deformation and the existing structure of shield tunnel under passing the existing railway constructiontechnology analysis and research, to provide data for the crossing engineering more and more, to provide a reference for the similar projects abroad.