摘要
为了探究病害影响下地铁大直径盾构隧道结构安全状态,基于现场调研结果,建立以管片接缝变形、管片破损、内部结构开裂、渗漏水、纵向不均匀沉降为指标层的安全评价体系,采用基于层次分析法的模糊综合评价理论,对运营期地铁大直径盾构隧道结构安全状态进行研究。研究表明:接缝变形、管片开裂与破损、渗漏水以及内部结构开裂是地铁大直径盾构隧道的典型病害类型;管片接缝错台是接缝变形的主要类型,多数测点错台量在限值以下;管片破损以崩角为主,螺栓孔是隧道渗漏的主要通道;中隔墙裂缝沿隧道纵向呈现两端少、中部多的特点;牛腿裂缝较为普遍,且沿隧道纵向均匀分布。评价结果表明,该隧道处于轻微受损状态的断面有36处,其余断面的状态均判定为“安全”。
In order to explored the structural safety state of metro large-diameter shield tunnel under the influence of diseases,based on the field investigation results,a safety evaluation system with segment joint deformation,segment damage,internal structure cracking,water leakage and longitudinal uneven settlement as the index layer was established.The structural safety state of metro large-diameter shield tunnel during operation was studied by the fuzzy comprehensive evaluation theory based on analytic hierarchy process.The results showed that joint deformation,segment cracking and damage,water leakage and internal structure cracking were typical diseases of metro large-diameter shield tunnel.Segment joint misalignment was the main type of joint deformation,and the misalignment of most measuring points were under the limit value.The segment damage was mainly caused by angle collapse,and the bolt hole was the main channel of tunnel leakage.The cracks in the middle partition wall were less at both ends and more in the middle along the longitudinal direction of the tunnel.The corbel cracks were more common and evenly distributed along the longitudinal direction of the tunnel.There were 36 sections in the state of slight damage,and the state of other sections was determined as safe.
作者
乔小雷
董飞
李奥
高才驰
QIAO Xiaolei;DONG Fei;LI Ao;GAO Caichi(Nanjing Metro Operation Co.,Ltd.,Nanjing 210046,China;JSTI Group,Nanjing 210029,China;Jiangsu Province Engineering Research Center of Underwater Tunnel Green Intelligent Technology,Nanjing 210029,China)
出处
《铁道勘察》
2023年第1期119-125,共7页
Railway Investigation and Surveying
基金
江苏省科技计划项目(BE2020082-2)
江苏省建设系统科技项目课题(2019ZD116)。
关键词
地铁
盾构隧道
典型病害
层次分析
评价指标
安全状态
metro
shield tunnel
typical diseases
analytic hierarchy process
evaluating indicator
safety status
