穿江地铁隧道施工及运营期河道监测分析  

Monitoring and Analysis of Riverway Conditions during the Construction and Operation of River-Crossing Metro Tunnels

作　　者：胡朝阳 王乐乐[2,3] 黄梅琼[2,3] 梁越 王新强[2,3] 何承农 HU Chaoyang;WANG Lele;HUANG Meiqiong;LIANG Yue;WANG Xinqiang;HE Chengnong(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098;Fujian Provincial Investigation,Design&Research Institute of Water Conservancy&Hydropower,Fuzhou 350001;Fujian Provincial Key Laboratory of Hydrodynamic and Water Engineering,Fuzhou 350001)

机构地区：[1]河海大学水利水电学院,南京210098 [2]福建省水利水电勘测设计研究院,福州350001 [3]福建省水动力与水工程重点实验室,福州350001

出　　处：《现代隧道技术》2021年第3期190-195,222,共7页Modern Tunnelling Technology

基　　金：福建水利科技项目(闽江下游水动力和河道演变与城市水安全研究)。

摘　　要：穿江地铁隧道面临渗漏、河床异常变形等风险,在施工及运营期开展河道监测对保障穿江隧道安全至关重要。文章以福州市地铁1号线穿江隧道为例,介绍了隧道盾构施工期间水下环境感知、河床地形测量、水体流态观测及监测成果与预警分析等河道监测工作,并基于实测资料分析了穿江隧道区域2009—2018年间的河床冲淤变化情况。结果表明:基于河道监测情况,两测次对盾构施工期间的渗漏险情进行了及时预警,取得了较好的监测效果;自2009年以来,穿江隧道断面年际间呈小幅度冲淤交替状态,2018年最深点高程为-16.06 m,相对穿江隧道埋设采用的-18.57 m仅余下2.51 m。建议采取河床防护、汊道分流等工程措施,并建立穿江隧道区域河床安全监测机制,做好应急保护措施以确保地铁运营期安全。River-crossing metro tunnels are faced with risks such as leakage and abnormal deformation of the riverbed.Therefore,riverway monitoring during the construction and operation period is essential to ensure the safety of river-crossing tunnels.Taking the river-crossing tunnel of Fuzhou Metro Line 1 as an example,this paper introduces the riverway monitoring work such as underwater environment perception,riverbed topography survey and water flow pattern observation during the shield construction,including monitoring results and early warning analysis,and analyzes the changes of riverbed erosion and deposition in the river-crossing tunnel section during 2009-2018 based on the actual measurement data.The results show that based on the monitored riverway conditions,two alerts regarding water leakage hazards during the shield construction have been issued timely,achieving good monitoring effects;since 2009,the riverbed within the cross-section of the river-crossing tunnel is in a small alternate state of erosion and deposition between years,with the deepest elevation point at-16.06 m in 2018,a gap of only 2.51 m compared to the-18.57 m used for the river-crossing tunnel design.It is recommended that engineering measures such as riverbed protection and branching diversion etc.should be taken,the riverbed safety monitoring mechanism should be established for the river-crossing tunnel section,and emergency protection measures should be prepared to ensure the metro operation safety.

关 键 词：地铁 穿江隧道 河床监测 盾构隧道 

分 类 号：TV149[水利工程—水力学及河流动力学] U456.3[建筑科学—桥梁与隧道工程]