Application of Automatic Deformation Monitoring System in Subway Tunnel Protection
Nearby construction may affect the stability and safety of the subway tunnel.Automatic monitoring,compared to manual monitoring,offers higher real-time precision and efficiency,conserves manpower,provides long-term stable monitoring,and includes warning functions,helping to promptly detect issues and take corresponding measures to ensure the safe operation of the tunnel structure.This paper,based on actual engineering cases,utilizes an automatic deformation monitoring system to study the impact of nearby construction on subway tunnel deformation through monitoring track bed settlement,horizontal displacement,tunnel segment convergence,and vertical offset between tracks.The results indicate:the cumulative range of track bed settlement varies from-18.9 mm to-0.1 mm;cumulative horizontal displacement ranges from-1.2 mm to 11.8 mm;cumulative tunnel segment convergence ranges from-2.3 mm to 6.1 mm;and cumulative vertical offset between tracks ranges from-1.7 mm to 1.6 mm.The construction period of the foundation pit has a significant impact on the settlement of the roadbed,horizontal displacement,and convergence of the pipe segments;The accumulated value of roadbed settlement continues to increase after construction,and the accumulated value of horizontal displacement and segment convergence tends to stabilize;Overall,the cumulative height difference between the two tracks is less affected by construction.
automatic monitoringsubway tunnel protectiontrack bed settlementhorizontal displacementtunnel segment convergencevertical offset between tracks
万方数据
维普
