地铁行车荷载作用下地层和重叠隧道变形数值模拟研究  

Numerical simulation of deformation of strata and stacked tunnels under traffic loads of subway

作　　者：胡垚 李明帅 郭飞 许英刚 雷华阳[4] 吴筱 陈学俭 HU Yao;LI Mingshuai;GUO Fei;XU Yinggang;LEI Huayang;WU Xiao;CHEN Xuejian(State Key Laboratory of Geological Disaster Prevention and Geological Environment Protection,Chengdu University of Technology,Chengdu 610059,China;College of Environment and Civil Engineering,Chengdu University of Technology,Chengdu 610059,China;CCCC(Tianjin)Eco-Environmental Protection Design&Research Institute Co.,Ltd.,Tianjin 300220,China;School of Civil Engineering,Tianjin University,Tianjin 300350,China;College of Water Resources and Hydropower,Wuhan University,Wuhan 430072,China)

机构地区：[1]地质灾害防治与地质环境保护国家重点实验室(成都理工大学),四川成都610059 [2]成都理工大学环境与土木工程学院,四川成都610059 [3]中交(天津)生态环保设计研究院有限公司,天津300220 [4]天津大学建筑工程学院,天津300350 [5]武汉大学水利水电学院,湖北武汉430072

出　　处：《岩土工程学报》2023年第S02期258-263,共6页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目(42307260,52378363);四川省自然科学基金项目(2023NSFSC0882);地质灾害防治与地质环境保护国家重点实验室开发基金项目(SKLGP2023K024);北京交通大学隧道及地下工程教育部工程研究中心开放课题(TUC2022-03)。

摘　　要：地铁列车运行时产生的行车荷载对地层和重叠隧道有显著影响。然而,现有研究很少聚焦重叠隧道变形响应,且缺乏行车荷载施加位置的影响。选取天津某重叠隧道工程,采用激振力函数确定行车荷载,开展地铁行车荷载作用下地层及重叠隧道变形数值模拟。结果表明:地铁行车荷载的施加位置会对地层位移和隧道变形产生明显影响。Smax值和i值均与数据提取位置相关。距隧道中心1.5D为地铁行车荷载引起地层水平位移的临界影响范围。三种工况作用下,隧道纵向变形均表现为整体下沉。行车荷载仅施加于上或下隧道时,施加荷载的隧道横向变形较大;同时施加于两隧道时,两隧道均在底部产生变形。The traffic loads of subway have a significant impact on the strata and stacked tunnels.However,the existing studies have rarely focused on the deformation response of stacked tunnels and consider the influences of the location of the traffic loads.By selecting a stacked tunnel project in Tianjin,the excitation force function is used to determine the traffic loads,and numerical simulations are conducted to analyze the deformation of stacked tunnels under the traffic loads of subway.The results demonstrate that the position where the traffic loads of subway are applied significantly affects the displacement of strata and deformation of tunnels.Both Smax and i values are related to the location of data extraction.The critical influence range of lateral displacement caused by the traffic loads of subway is 1.5D from the center of the tunnel.Under the three conditions,the longitudinal deformations of the tunnels are overall downward.When the traffic loads of subway are applied only to the upper or the lower tunnel,the transverse deformation of the tunnel under the loads is large.When the loads are applied to two tunnels synchronously,both the two tunnels deform at the bottom.

关 键 词：重叠隧道 行车荷载 激振力函数 数值模拟 变形特性 

分 类 号：TU753[建筑科学—建筑技术科学] U231[交通运输工程—道路与铁道工程]