复杂条件超深盾构施工关键技术研究与应用

Research and Application of Key Technologies for Ultra-Deep Shield Construction under Complex Conditions: A Case Study of Tunnel Section of Shanghai Airport Link Line

摘要:

随着城市地下空间开发利用的发展，盾构施工的环境复杂度、技术难度与要求逐渐提高。针对复杂地质条件及城市高密度环境现状，通过文献调研与案例分析总结了复杂地层超深盾构施工时的常见风险，包括盾构姿态控制难、盾构密封性能不良、复杂条件引起的掘进效率下降与施工沉降控制不到位等4方面，并以上海轨道交通市域线机场联络线浦东机场站—规划航站楼站区间隧道为工程案例，对盾构推进、盾构密封、泥水管路磨损处理与沉降控制进行了技术应用的实践分析，以期为后续复杂条件超深盾构工程提供参考与借鉴。

Abstract:

With the development and utilization of urban underground space, the environmental complexity, technical difficulties and requirements of shield construction are gradually increasing. In view of the complex geological conditions and the current urban high-density environment, the common risks in ultra-deep shield tunneling in complex strata are summarized through literature review and case analysis, including difficulties in shield posture control, poor shield sealing performance, reduced tunneling efficiency and inadequate construction settlement control caused by the complex conditions. Taking the tunnel between Pudong Airport Station and the planned terminal building station of the airport link line of Shanghai Metro Intercity Line as an engineering case, a practical analysis of the technical application in terms of shield tunneling, shield sealing, wear treatment of slurry pipelines and settlement control is conducted in order to provide the valuable guidance and reference for subsequent shield tunneling construction under complex and ultra-deep conditions.