铁道科学与工程学报2025，Vol.22Issue(2)：496-508,13.DOI:10.19713/j.cnki.43-1423/u.T20241589
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
摘要
Abstract
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 research results can provide control value reference for the high-speed railway subgrade project under shield tunneling.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Key words
shield underpass construction/train-rail-track-bed coupling/running safety/reliability evaluation/tunnel分类
交通工程引用本文复制引用
唐钱龙,邹洋,刘妙,彭立敏..盾构下穿时高铁行车安全随机可靠度评估方法[J].铁道科学与工程学报,2025,22(2):496-508,13.基金项目
国家自然科学基金资助项目(52378420) （52378420）
江西省交通运输厅科技项目(2023H0020) （2023H0020）
