地铁暗挖隧道穿越强风化闪长岩入岩深度可靠性研究  

Study on Reliability of Rock Penetration Depth of Subway Underground Tunnel Through Strongly Weathered Diorite

作　　者：毕研超 王建涛 宋佳 赵广资[3] BI Yanchao;WANG Jiantao;SONG Jia;ZHAO Guangzi(Ji’nan Traffic Engineering Quality and Safety Center,Ji’nan 250014,China;Ji’nan Rail Transit Group Co.,Ltd.,Ji’nan 250014,China;China Railway 18th Bureau Group Third Engineering Co.,Ltd.,Zhuozhou 072750,China;Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]济南市交通工程质量与安全中心,山东济南250014 [2]济南轨道交通集团有限公司,山东济南250014 [3]中铁十八局集团第三工程有限公司,河北涿州072750 [4]西安交通大学,陕西西安710049

出　　处：《粉煤灰综合利用》2024年第6期63-67,共5页Fly Ash Comprehensive Utilization

摘　　要：为探讨地铁暗挖隧道穿越强风化闪长岩入岩深度的可靠性,基于济南隧道实例,调研了隧道沉降规律,并利用Ansys数值模型与可靠度分析模块,结合蒙特卡洛抽样方法,将岩土参数设为随机变量,分析隧道嵌入强风化闪长岩最小深度时的地表沉降特征。结果表明:地表沉降最大垂直位移不超过25 mm的概率高达0.942,满足安全标准。该研究为地铁暗挖隧道穿越复杂地层提供了科学的可靠性评估方法,有助于优化设计与施工策略,确保隧道结构稳定,降低施工风险,对地铁工程建设具有重要实践意义。The study aims to assess the reliability of the excavation depth for subway tunnels constructed by the cut-and-cover method during their crossing of highly weathered diorite formations.A tunnel in Jinan,China,was used as a case study to investigate tunnel settlement behavior.Ansys numerical modeling and reliability analysis modules,in combination with Monte Carlo sampling techniques,were utilized.Geotechnical parameters were treated as random variables to analyze surface settlement characteristics when the tunnel was embedded to a minimum depth within the highly weathered diorite.The results show that the maximum vertical displacement of surface settlement not exceeding 25mm had a high probability of 0.942,meeting safety standards.A scientific reliability assessment method is provided for subway tunnels constructed by the cut-and-cover method when crossing complex geological formations.It aids in the optimization of design and construction strategies,ensuring tunnel structural stability and reducing construction risks.The study holds significant practical implications for subway engineering projects.

关 键 词：暗挖隧道 强风化闪长岩 入岩深度 可靠度 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]