Large-diameter shield near-surface metro tunnel micro-disturbance control method and system
By employing a comprehensive approach that combines zoned grouting reinforcement, experimental section parameter optimization, shield tunneling control, and automated monitoring, the problem of soil disturbance control when a large-diameter shield tunnel passes close to a subway tunnel was solved, achieving millimeter-level micro-disturbance control and ensuring the safe operation of existing subway tunnels.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA RAILWAY 22ND BUREAU GRP RAIL ENG CO LTD
- Filing Date
- 2026-06-16
- Publication Date
- 2026-07-17
AI Technical Summary
When large-diameter shield tunneling passes close to existing subway tunnels, soil disturbance control is difficult. Traditional solutions lack zoned reinforcement, have inaccurate soil removal measurement, inconsistent filling of shield gaps, and are disconnected from monitoring and construction, resulting in high ground loss rates and making it difficult to meet the requirement of controlling the deformation of existing tunnels within ±10mm.
A comprehensive approach was adopted, including surface zonal grouting reinforcement, test section parameter optimization, shield tunneling control, shield shell gap filling, and automated monitoring. This approach included inclined double-liquid grouting, vertical single-liquid grouting, lidar dry slag measurement, plastic filling materials, and automated monitoring feedback, forming a closed-loop control system.
It achieves millimeter-level micro-disturbance control of existing tunnel structures under the condition that the clearance is less than one tunnel diameter, ensuring the all-weather, speed-unrestricted operation of subway lines and solving the systematic deficiencies of soil disturbance control in traditional technologies.
Smart Images
Figure CN122407210A_ABST