软土地基下城市超长地铁隧道的沉降与变形监测及时空数据插补方法  

Settlement and deformation monitoring and spatio-temporal data interpolation method for urban ultra long subway tunnels under soft soil foundation

作　　者：韩晨希 黄宏伟[1] 欧阳凌涵 周鸣亮 HAN Chenxi;HUANG Hongwei;OUYANG Linghan;ZHOU Mingliang(Department of Civil Engineering,Tongji University,Shanghai 200092,China;School of Engineering,Cardiff University,Cardiff CF243AA,UK)

机构地区：[1]同济大学土木工程学院,上海200092 [2]卡迪夫大学工学院,卡迪夫CF243AA

出　　处：《地质科技通报》2024年第6期152-161,共10页Bulletin of Geological Science and Technology

摘　　要：城市地铁隧道的沉降监测与收敛变形的精准监控对于保障运营安全及周边环境稳定性至关重要。传统的监测方式,如人工巡检和固定传感器监测,存在实时性差、数据有限等问题。以上海地铁2号线东延伸段(在软土地基下采用盾构技术建造的大型城市地下隧道工程)为例,介绍了一种创新的无线传感网络(wireless sensor network,简称WSN)监测技术,针对无线传感网络监测数据可能存在缺失的问题,提出了一种适用于无线传感网络特性的缺失值补全算法,以填补长达8年的监测周期中可能出现的数据空白点。通过以上监测网络及算法获取了该隧道的完整监测数据及特征指标,并揭示了软土地基盾构隧道横向收敛变形的部分影响因素。本研究在确保了监测数据的有效性和完整性的基础上,为软土地基盾构隧道的施工安全和地铁运营安全提供了技术支持和数据保障。[Objective]Precise monitoring of settlement and convergence deformation in urban subway tunnels is crucial for ensuring operational safety and the stability of the surrounding environment.Traditional methods,such as manual inspections and fixed sensor monitoring,suffer from poor real-time performance and limited data availa-bility.[Methods]To address the limitations of traditional approaches,an innovative wireless sensor network(WSN)monitoring system is introduced in this study by taking the East Extension Section of Shanghai Metro Line 2,a large-scale urban underground tunnel constructed using shield technology in soft soil as the example.Addition-ally,a missing value imputation algorithm tailored to WSN characteristics is proposed to address the potential data gaps in WSN monitoring which may arise in the following 8-year monitoring period.[Results]The implementation of this monitoring network and algorithm provides full data and characteristic indicators for the tunnel monitoring,which aids in revealing the influencing factors of lateral convergence deformation in shield tunnels constructed in soft soil.[Conclusion]By ensuring the effectiveness and completeness of the monitoring data,this research offers technical support and data assurance for the safety of shield tunnels in soft soil and the operational safety of sub-ways.

关 键 词：软土地基 超长地铁隧道 沉降监测 无线传感网络 缺失值补全算法 

分 类 号：TU447[建筑科学—岩土工程] U234[建筑科学—土工工程] U456[交通运输工程—道路与铁道工程]