正上方轻量加卸载时双圆盾构隧道变形监测与整治分析  

Deformation Monitoring and Treatment Analysis of Double-circle Shield Tunnel during Upper Light Loading and Unloading

作　　者：袁钊 YUAN Zhao

机构地区：[1]上海勘察设计研究院(集团)股份有限公司,上海市200438

出　　处：《城市道桥与防洪》2024年第8期190-194,199,共6页Urban Roads Bridges & Flood Control

摘　　要：软土地区运营轨道交通因上方轻量加卸载作用而产生的变形问题,在工程领域受到广泛关注。上海某道路工程跨越地铁双圆盾构区间,且该项目涉及河道改道施工,故隧道上部存在复杂的轻量加卸载作用。通过对该下卧软土双圆盾构隧道的变形监测,分析了轻量加卸载作用对运营盾构隧道的影响,并针对河道改道区段进行重点分析,总结出了产生沉降漏斗的主要原因;随后,结合现场监测数据和沉降原因,对重点区域的路面结构进行了整治。监测结果表明:基于监测数据采取的重点整治技术措施治理效果明显,对于轻量加卸载作用下双圆盾构隧道运营安全保护具有重要的工程实践价值。The deformation problem caused by the upper light loading and unloading action of the rail transit operated in soft soil area has received wide attention in the engineering field.A road project in Shanghai spans the section of the double-circle shield of the subway,and the project involves the construction of river diversion.Therefore,there is a complex light loading and unloading action in the upper part of the tunnel.Through the deformation monitoring of the double-circle shield tunnel in the underlying soft soil,the influence of light loading and unloading on the operation of the shield tunnel is analyzed.And the focus is on the analysis of river diversion section.The main reasons for the settling funnel are summarized.Combined with the field monitoring data and settling reasons,the pavement structure of the key area is treated.The monitoring result shows that the key treatment technical measures based on the monitoring data are effective.It has important engineering practice value for operating safety protection of double-circle shield tunnel under the light loading and unloading action.

关 键 词：轻量加卸载 双圆盾构隧道 沉降漏斗 变形监测 

分 类 号：U456[建筑科学—桥梁与隧道工程]