Study on Temperature Adaptability of Track Structure in Railway Bridge-tunnel Transition Area in Complex and Difficult Mountainous Areas

被引：0
|
作者：
Hou B. [1 ,2 ]
Zhao W. [3 ]
Gao L. [1 ]
Cai X. [1 ]
Qie L. [4 ]
Xu Y. [4 ]
机构：
[1] School of Civil Engineering, Beijing Jiaotong University, Beijing
[2] Beijing Rail Transit Line Engineering Safety and Disaster Prevention Engineering Technology Research Center, Beijing
[3] Intelligent Transportation Research Branch of Zhejiang Communications Investment Group Co., Ltd., Hangzhou
[4] Railway Engineering Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing
来源：
Tiedao Xuebao/Journal of the China Railway Society | 2022年 / 44卷 / 05期
关键词：
Ballast track; Bridge-tunnel transition area; Complex and difficult mountainous areas; CWR track; Slab track;
D O I：
10.3969/j.issn.1001-8360.2022.05.015
中图分类号：
学科分类号：
摘要：
The harsh service environment of railway in complex and difficult mountainous areas poses a new challenge to the design of tracks in bridge-tunnel transition area. Based on the analysis of service requirements of the track in the bridge-tunnel transition area of the complex and difficult mountainous area, a track-foundation spatial refined model for the bridge-tunnel transition area was built in this paper. At the same time, considering the temperature load characteristics inside and outside the tunnel, the temperature adaptability of different track structures in the bridge-tunnel transition area was analyzed, and suggestions on structure selection were put forward. The results show that: due to the longitudinal temperature gradient load at the tunnel port, the peak value of longitudinal displacement of rail appears in the temperature transition zone. After ballastless track being laid on the bridge, the deformation coordination relationship of the multi-layer concrete structure system causes uneven vertical short-medium wavelength deformations of the structures. There may be a contact loss area between the slab and the base. The maximum vertical separation distance of 1.6mm will affect the regularity of the rail line. The ballast track on the bridge effectively reduces the temperature stress of the rail, resulting in more uniform overall deformation of the structures. Considering the special bridge structures such as long-span suspension bridge and long-span steel truss arch bridge in complex and difficult mountainous areas, the ballast track is more recommended on the bridge of bridge-tunnel transition area in complex and difficult mountainous areas. © 2022, Department of Journal of the China Railway Society. All right reserved.
引用
收藏
页码：119 / 126
页数：7
相关论文
共 27 条
  • [1] GUO Changbao, ZHANG Yongshuang, JIANG Liangwen, Et al., Discussion on the Environmental and Engineering Geological Problems along the Sichuan-Tibet Railway and Its Adjacent Area, Geoscience, 31, 5, pp. 877-889, (2017)
  • [2] YUAN Jinke, PEI Xiangjun, CHENG Qiang, Et al., Analysis on Temperature Variation Regularity and Slope Temperature Field-deformation along Sichuan-Tibet Expressway, Journal of Highway and Transportation Research and Development, 36, 10, pp. 33-42, (2019)
  • [3] PAIXAO A, FORTUNATO E, CALCADA R., Transition Zones to Railway Bridges:Track Measurements and Numerical Modelling, Engineering Structures, 80, pp. 435-443, (2014)
  • [4] LIU Y, ZHAO G T., Study on Reasonable Length of Ballasted-CRTSII Ballastless Track Transition Section on High-speed Railway Bridge, Advanced Materials Research, pp. 1301-1305, (2013)
  • [5] PECNIK M, BORZOVIC V, LACO K., Non-linear FEM Analysis of Integral Bridges Transition Area, Solid State Phenomena, 259, pp. 152-157, (2017)
  • [6] ZENG Zhiping, LUO Jun, RAO Huiming, Et al., Mapping Relationship between the Temperature and Longitudinal Displacement of Rails at the Transition between the Bridge and Tunnel, Journal of Railway Engineering Society, 35, 1, pp. 29-35, (2018)
  • [7] ZENG Zhiping, LUO Jun, WEI Wei, Et al., Experiment on the Temperature and Longitudinal Deformation of Rail at the Transition between Bridges and Tunnels for High-speed Railway, Journal of Railway Engineering Society, 34, 1, pp. 30-35, (2017)
  • [8] YU Xiangdong, LI Yukun, YAN Bin, Continuously Welded Rail Track Longitudinal Forces Distribution Characteristics of Solid Web Reinforced Concrete Arch Bridge of Bridge-tunnel Connection Section, Journal of Railway Science and Engineering, 15, 12, pp. 3066-3072, (2018)
  • [9] LI Guolong, LI Guoqing, GAO Mangmang, Et al., Analysis of Train-track Dynamic Behavior in Bridge-tunnel Transition Section Considering Temperature Deformation of CRTS Ⅰ Slab Ballastless Track, Railway Engineering, 58, 1, pp. 133-137, (2018)
  • [10] ZHANG Xiangmin, GAO Liang, ZENG Zhiping, Et al., Experiment of Air and Rail Temperature and Design of CWR Track of Fenghuo Mountain Tunnel on Qinghai-Tibet Railway, Journal of Beijing Jiaotong University, 37, 3, pp. 73-78, (2013)
123