地铁列车下穿运行振动对既有管线影响研究  

Research on the Impact of Subway Train Underpass Vibration on Existing Pipelines

作　　者：申富林[1] 钟子林 张雪松[2] SHEN Fu-lin;ZHONG Zi-lin;ZHANG Xue-song(Guangzhou Railway Polytechnic,Guangzhou 511300,China;Guangzhou Panyu Polytechnic,Guangzhou 511400,China)

机构地区：[1]广州铁路职业技术学院,广东广州511300 [2]广州番禺职业技术学院,广东广州511400

出　　处：《南方职业教育学刊》2024年第6期104-109,共6页Journal of Southern Vocational Education

基　　金：申富林名师工作室(2022MSGZS009)

摘　　要：为研究地铁列车运行产生的振动荷载对既有管线动力特性和安全性的影响,以广州市轨道交通18号线地铁列车下穿既有供水管线工程为研究背景,采用MidasGTS有限元软件建立了“隧道-土体-管线-列车荷载”数值模型进行动力特性分析。分析结果表明:地铁列车在一般整体道床运行时产生Ⅲ级振动烈度时,既有供水管线存在破裂风险。但是,地铁列车在减震垫整体道床下穿运行产生的振动荷载处于安全烈度,相较于一般整体道床,既有管线的振动位移下降约3%~5%,振动速度下降约15%~20%,振动加速度下降约3 0%~5 0%,优化整体道床类型减震效果显著。To investigate the impact of vibration loads from subway train operations on the dynamic characteristics and safety of existing pipelines,this study uses the Guangzhou Metro Line 18 subway crossing under existing water supply pipelines as a research context.Using Midas GTS finite element software,a“tunnel-soil-pipeline-train load”numerical model was established for dynamic characteristic analysis.Results show that when subway trains operating on conventional track beds generate Level III vibration intensity,existing water supply pipelines face potential rupture risks.However,when trains operate on track beds with vibration damping pads,the vibration loads remain within safe intensity levels.Compared to conventional track beds,the existing pipelines show approximately 3%~5%reduction in vibration displacement,15%~20%reduction in vibration velocity,and 30%~50%reduction in vibration acceleration,demonstrating significant vibration damping effects through optimized track bed design.

关 键 词：地铁下穿 供水管线 动力特性 数值模拟 

分 类 号：U25[交通运输工程—道路与铁道工程]