首页期刊在线 2020年（第23卷）第1期

列车荷载作用下高铁隧道下有小净距地铁隧道穿越时的结构动力响应特性模拟分析

陈晨1曹瑞琅2赵宇飞2寇卫国3张雪东2

Simulation Analysis on Highspeed Railway Structural Dynamic Response under the Action of Train Load When Metro Tunnel in Minimal Spacing under Highspeed Railway

CHEN ChenCAO Ruilang ZHAO Yufei KOU WeiguoZHANG Xuedong

作者信息:

1.中国地质大学（北京）工程技术学院，100083，北京；
2.中国水利水电科学研究院流域水循环模拟与调控国家重点实验室，100048，北京；
3.中铁上海工程局集团第一工程有限公司，200436，上海
Affiliation:

school of Engineering and Technology, China University of Geosciences, 100083， Beijing， China
关键词:

下穿高铁隧道;隧道振动;结构动力响应;模拟分析
Key words:

metro,tunnel crossing under high-speed railway, tunnel vibration, structural dynamic response, simulation analysis
DOI:

10.16037/j.1007-869x.2020.01.008
中图分类号/CLCN:

U451+.3
栏目/Col:

研究报告

摘要:

基于某地铁线路以极小净距下穿京张高铁盾构隧道工程，采用人工激振函数模拟列车振动荷载，分析不同工况下的隧道动力响应特性，探讨了高铁隧道结构的振动加速度、振动速度及竖向位移规律。模拟研究结果表明：隧道监测点振动幅值变化不仅与振动强度有关，还与激振源荷载作用位置有关，高铁隧道中心截面前后±15 m范围内的位移响应最大；隧道交叉位置呈现显著的振动放大现象，造成列车动荷载影响下衬砌结构薄弱区；振动响应总体趋势为自仰拱向拱顶逐渐衰减，即仰拱为隧道振动响应的最不利位置；考虑不同工况，高铁隧道结构的最大振动加速度、振动速度和竖向位移分别为110.204 mm/s2、3.006 mm/s、0.043 4 mm，低于结构安全振动控制标准的限值，满足安全要求

Abstracts:

Based on a shield tunnel project that crosses under Beijing-Zhangjiakou High-speed Rail in minimal spacing on Beijing metro Line 12, the dynamic response characteristics of the tunnel under different driving conditions are analyzed by simulating the train vibration loads with artificial excitation function, the acceleration, velocity and vertical displacement of tunnel structure are discussed. The results show that the vibration amplitude of tunnel monitoring points is not only related to the vibration intensity, but also to the position of exciting source load. The displacement response of high-speed railway tunnel is the greatest within ±15 m before and after the central section. The cross position of the tunnel presents obvious vibration amplification phenomenon, resulting in the weak area of the lining structure under the influence of train dynamic load. The overall response trend is attenuating from the inverted arch gradually to the vault, that is to say, the inverted arch is the most unfavorable position for the vibration response of the tunnel. In different driving conditions, the maximum acceleration, velocity and vertical displacement of the high-speed rail tunnel structure are 110.204 mm/s2, 3.006 mm/s and 0.043 4 mm respectively, which are lower than the structural safety vibration control standards and could meet safety requirements.

时评 / Commentary

陈晨，曹瑞琅，赵宇飞，等.列车荷载作用下高铁隧道下有小净距地铁隧道穿越时的结构动力响应特性模拟分析[J].城市轨道交通研究，2020，23（1）：31.

CHEN Chen，CAO Ruilang，ZHAO Yufei，et al.Simulation Analysis on Highspeed Railway Structural Dynamic Response under the Action of Train Load When Metro Tunnel in Minimal Spacing under Highspeed Railway[J].Urban mass transit，2020，23（1）：31.