摘要
随着城市化进程的加速,地铁隧道建设越来越多位于已有建(构)筑物的邻近区域。地铁引起的振动,尤其是高频振动,可能对周围环境和敏感建筑物产生影响,因此,准确预测地铁引起的振动传播成为一个重要课题。提出了一种基于列车-轨道-隧道相互作用模型和地下波传播模型的振动传播预测方法。通过现场测量与数值计算验证,发现高频成分在地下逐渐衰减,而地面上50Hz附近的频率成分明显放大。基于此,提出的列车-轨道-隧道模型能够有效预测隧道内的振动时程加速度水平,而二维有限元分析方法可以精确预测地面和地下的振动衰减及加速度分布。研究结果为地铁振动控制提供了可靠的理论基础,并为相关噪声治理工作提供了有力支持,有助于减少地铁建设和运营对周围环境的影响。
With the acceleration of urbanization,subway tunnels are increasingly constructed in proximity to existing buildings or facilities.Subway-induced vibrations,especially high-frequency ones,can affect the surrounding environment and sensitive buildings,making the accurate prediction of vibration propagation a critical issue.This paper presents a vibration propagation prediction method based on a train-track-tunnel interaction model and a ground wave propagation model.Field measurements and numerical calculations validate the proposed method,revealing that high-frequency components attenuate underground,while frequencies near 50Hz are significantly amplified at the ground surface.The train-track-tunnel interaction model effectively predicts the time-history acceleration levels of vibrations within tunnels,while 2D finite element analysis accurately predicts vibration attenuation and acceleration distribution in both underground and surface areas.The findings provide a reliable theoretical basis for vibration control in subway construction and offer strong support for noise mitigation efforts,helping to reduce the impact of subway construction and operation on the surrounding environment.
作者
闫建宁
YAN Jianning(China Railway 18th Bureau Group Third Engineering Co.,Ltd.,Zhuozhou,Hebei 072750,China)
出处
《施工技术(中英文)》
2025年第7期7-11,共5页
Construction Technology
基金
中铁十八局集团有限公司西安轨道交通8号线一期工程科研创新项目(C2022-049)。
关键词
地铁
隧道
振动
预测
有限元分析
subways
tunnels
vibration
prediction
finite element analysis
