Unsteady slipstream of a train passing through a high-speed railway tunnel with a cave  

作　　者：Xiaohui Xiong Rilong Cong Xiaobai Li Yutang Geng Mingzan Tang Shujun Zhou Yanling Na Chongxu Jiang 

机构地区：[1]Key Laboratory of Traffic Safety on Track of Ministry of Education,Central South University,Changsha 410075,Hunan,China [2]Joint International Research Laboratory of Key Technology for Rail Traffic Safety,Central South University,Changsha 410075,Hunan,China [3]National&Local Joint Engineering Research Centre of Safety Technology for Rail Vehicle,Central South University,Changsha 410075,Hunan,China [4]Northeast Normal University Dongan Experimental School,Changchun 130000,Jilin,China [5]Urban rail transit branch,China Railway Design Corporation,Tianjin 300000,China [6]National Engineering Laboratory for Digital Construction and Evaluation Technology of Urban Rail Transit,China Railway Design Corporation,Tianjin 300000,China.

出　　处：《Transportation Safety and Environment》2022年第4期107-120,共14页交通安全与环境（英文）

基　　金：the High-Speed Train Research Center of Central South University,China.Thiswork was supported by the National Key Research and Development Program of China(Grant No.2020YFA0710903-01);the Graduate Student Independent Innovation Project of Hunan Province(Grant No.CX20200196).

摘　　要：The cave is of great importance for the storage of equipment and to avoid having workers in the tunnel,but it changes the tunnel section,leads to a change of slipstream and affects the safety of trains and workers.The Re-normalization group(RNG)k-εturbulence method is used to investigate the slipstream induced by a single train passing through a double-track tunnel at 350 km/h.The slipstream in a tunnel with and without a cave is compared.The slipstream components in three directions are reported comprehensively.The results show that the existence of a cave changes the slipstream at the tail of the train.At measurement points before and after the train passes the cave,the intensity of the slipstream at the tail ismitigated;as the train passes the cave,the tail slipstream is enhanced to a certain extent.With increasing lateral distance,the peak value of the slipstream with a cave decreases faster than that without a cave.These findings suggest that the presence of a cave mitigates the slipstream intensity,but special attention should be paid to the design of ancillary facilities,especially their relative location.

关 键 词：High-speed train railway tunnel CAVE SLIPSTREAM 

分 类 号：U458[建筑科学—桥梁与隧道工程] U298[交通运输工程—道路与铁道工程]