Dynamic Response of Double-Track Subgrade of High-Speed Railway Crossing Ground Fissure Zone

被引：0
|
作者：
Huang Q. [1 ,2 ]
Xue L. [1 ]
He G. [1 ]
Wang T. [1 ]
机构：
[1] Department of Geological Engineering, Chang'an University, Xi'an
[2] Key Laboratory of Western China's Mineral Resources and Geological Engineering of Ministry of Education, Chang'an University, Xi'an
来源：
| 1600年 / Chinese Academy of Railway Sciences卷 / 41期
关键词：
Double-track subgrade; Dynamic response; Ground fissure zone; High-speed railway; Natural foundation; Train load;
D O I：
10.3969/j.issn.1001-4632.2020.05.02
中图分类号：
学科分类号：
摘要：
Taking the Daxi passenger dedicated line crossing the ground fissure zone of the Dongguan substation in Qixian County, Taiyuan Basin of Shanxi Province as the engineering background, Midas/GTS finite element analysis software was used to establish a three-dimensional dynamic finite element calculation model of the ground fissure zone-subgrade-natural foundation. The vertical dynamic response of natural foundation subgrade was studied under the conditions of double-track train operation in opposite directions and single-track train operation. The laws of the vertical dynamic response of natural foundation subgrade on the hanging and foot walls of ground fissure zone under the conditions of double-track train operation in opposite directions at different train speeds were investigated. Results show that the ground fissure zone has a significant impact on the dynamic response of subgrade, and the hanging wall is greater than the footwall. The dynamic displacement, dynamic acceleration and dynamic stress of the subgrade change greatly in waveform along the longitudinal direction of the subgrade under the condition of double-track train operation in opposite directions. However, the change under single track train operation is more stable, and the dislocation only occurs at ground fissure zone, and the dynamic response of the subgrade under double-track train operation is significantly greater than that under single-track train operation. The dynamic stress of the subgrade increases sharply near the ground fissure zone under double-track train operation in opposite directions. The critical effect depths of the dynamic stress and acceleration in the subgrade are 35 m and 20 m respectively, and the dynamic displacement decreases along the vertical direction in a quadratic function relationship. The dynamic displacement and dynamic stress in subgrade crossing ground fissure zone meet the first-order function relationship with the train speed, while the acceleration and train speed meet the quadratic function relationship. © 2020, Editorial Department of China Railway Science. All right reserved.
引用
收藏
页码：11 / 19
页数：8
相关论文
共 16 条
  • [1] PENG Jianbing, LU Quanzhong, HUANG Qiangbing, Et al., Hazard of Ground Fissure in Fen-Wei Basin, (2017)
  • [2] HUANG Qiangbing, PENG Jianbing, GAO Huyan, Et al., The Longitudinal Fortified Length of Metro Tunnel Obliquely Crossing the Active Ground Fissure Zones, Journal of the China Railway Society, 32, 1, pp. 73-78, (2010)
  • [3] BONI R, HERRERA G, MEISINA C, Et al., Twenty-Year Advanced DInSAR Analysis of Severe Land Subsidence: The Alto Guadalentín Basin (Spain) Case Study, Engineering Geology, 198, pp. 40-52, (2015)
  • [4] YIN Yueping, ZHANG Zuochen, ZHANG Kaijun, Land Subsidence and Countermeasures for Its Prevention in China, The Chinese Journal of Geological Hazard and Control, 16, 2, pp. 1-8, (2005)
  • [5] LI Shucai, LI Shuchen, ZHANG Qingsong, Et al., Forecast of Karst-Fractured Groundwater and Defective Geological Conditions, Chinese Journal of Rock Mechanics and Engineering, 26, 2, pp. 217-225, (2007)
  • [6] CAI Degou, Test on Frost Heaving Spatial-Temporal Distribution of High Speed Railway Subgrade in Seasonal Frozen Soil Region, China Railway Science, 37, 3, pp. 16-21, (2016)
  • [7] HUANG Qiangbing, PENG Jianbing, WANG Feiyong, Et al., Issues and Challenges in the Development of Urban Underground Space in Adverse Geological Environment, Earth Science Frontiers, 26, 3, pp. 85-94, (2019)
  • [8] KRYLOV V V., Generation of Ground Vibrations by Superfast Trains [J], Applied Acoustics, 44, 2, pp. 149-164, (1995)
  • [9] HUNG H H, YANG Y B., Elastic Waves in Visco-Elastic Half-Space Generated by Various Vehicle Loads, Soil Dynamics & Earthquake Engineering, 21, 1, pp. 1-17, (2001)
  • [10] JIANG H G, BIAN X C, CHENG C, Et al., Simulating Train Moving Loads in Physical Model Testing of Railway Infrastructure and Its Numerical Calibration [J], Acta Geotechnica, 11, 2, pp. 231-242, (2016)
12