盾构下穿时高铁行车安全随机可靠度评估方法  

The stochastic reliability evaluation method for driving safety of high-speed railway during shield tunneling

作　　者：唐钱龙[1,2] 邹洋 刘妙 彭立敏 TANG Qianlong;ZOU Yang;LIU Miao;PENG Limin(Jiangxi Vocational and Technical College of Communication,Nanchang 330013,China;School of Civil Engineering,Central South University,Changsha 410075,China;Hunan Vocational College of Engineering,Changsha 410151,China)

机构地区：[1]江西交通职业技术学院,江西南昌330013 [2]中南大学土木工程学院,湖南长沙410075 [3]湖南工程职业技术学院,湖南长沙410151

出　　处：《铁道科学与工程学报》2025年第2期496-508,共13页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(52378420);江西省交通运输厅科技项目(2023H0020)。

摘　　要：为解决高铁行车在盾构下穿时安全性评估难以完全考虑土层不均匀性和不确定性等因素的问题,基于多体系统动力学和有限元方法,分别建立列车子系统和轨道-盾构隧道-地基土子系统模型,并利用轮轨接触关系组成整体耦合时变系统。运用随机可靠度理论,对盾构下穿高速铁路路基段时隧道埋深、盾构间距、掘进状态、注浆范围和地层损失率等因素下高速列车的运行安全进行了可靠性评估。在确定可接受的列车运行失效概率条件下,计算、分析和总结盾构掘进过程中高速列车的安全运行可靠度指标,并给出盾构掘进时不同车速等级下各因素的安全限值。结果表明:车速越大,列车运行安全可靠度指标越小;隧道埋深、盾构间距、预注浆加固范围越大,列车运行安全可靠度指标越大;不同掘进状态亦影响列车运行安全可靠度指标;地层损失率越大,列车运行安全可靠度指标越小;列车交会时的可靠度指标比单车行驶时更小;车速为200、250、300和350 km/h时,单车与双车交会失效概率大致满足一定的比例关系,其比值的变化范围为1.10~1.28。当车速等级分别为1级(>300 km/h)、2级(250~300 km/h)、3级(200~250 km/h)和四级(<200 km/h)时,对应的隧道埋深、盾构间距、注浆范围和地层损失率等指标参数有一定的控制限值。研究结果可为盾构下穿高铁路基项目提供控制值参考。To address the limitations in safety assessment of high-speed rail operations during shield tunneling beneath existing tracks,particularly regarding insufficient consideration of soil heterogeneity and geotechnical uncertainties,a multi-body system dynamics model for the train subsystem and a finite element model for the track-shield tunnel-foundation soil subsystem were developed independently,subsequently integrated through wheel-rail interaction mechanisms to establish a time-varying coupled system.The reliability of high-speed train operation under various factors such as tunnel depth,shield spacing,tunneling state,grouting range,and formation loss rate was assessed using stochastic reliability theory.By determining the acceptable probability of train operation failure,the safety operation reliability indicators of high-speed trains during shield tunneling were calculated,analyzed,and summarized,and the safety limits for various factors at different speed levels during shield tunneling were determined.The results indicate that the reliability indicator of train operation safety decreases with increasing speed.The greater the depth of the tunnel,the spacing between shield tunnels,and the range of pre grouting reinforcement,the greater the reliability indicators of the train,different excavation states also affect the reliability indicators of trains.The higher the formation loss rate,the smaller the train reliability indicators.The reliability indicators during train crossing is smaller than that during single vehicle operation.At speeds of 200,250,300,and 350 km/h,the probability of single vehicle and double vehicle intersection failure roughly follows a certain proportional relationship,with the ratio ranging from 1.10 to 1.28.When the vehicle speed levels are first level(>300 km/h),second level(250~300 km/h),third level(200~250 km/h),and fourth level(<200 km/h),there are certain control limits for the corresponding parameters such as tunnel depth,shield spacing,grouting range,and formation loss rate.The res

关 键 词：盾构下穿施工 列车-轨道-道床耦合 行车安全 可靠度评估 隧道 

分 类 号：U25[交通运输工程—道路与铁道工程]