1.中铁第四勘察设计院集团有限公司,武汉 430063
2.水下隧道技术国家地方联合工程研究中心,武汉 430063
3.山东建筑大学土木工程学院,济南 250101
4.哈尔滨工业大学(深圳)土木与环境工程学院,深圳 518067
肖明清(1970—),男,全国工程勘察设计大师,正高级工程师,工学博士,主要从事隧道和地下工程设计研究工作,E-mail:tsyxmq1419@163.com。
王春晖(1991—),男,讲师,工学博士,主要从事轨道交通振动分析与减振研究工作,E-mail:wangchunhui23@sdjzu.edu.cn。
收稿:2025-01-13,
修回:2025-02-09,
网络首发:2025-03-10,
纸质出版:2025-05-20
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XIAO Mingqing, XUE Guangqiao, HE Yingdao, et al. Analysis of Vibration Propagation Mechanisms in High-speed Railway Shield Tunnels with Single-Tube Double-Track Configuration[J]. Railway Standard Design, 2025, 69(5): 1-8.
肖明清, 薛光桥, 何应道, 等. 高速铁路单洞双线盾构隧道的振动和传播规律分析[J]. 铁道标准设计, 2025,69(5):1-8. DOI: 10.13238/j.issn.1004-2954.202501130008.
XIAO Mingqing, XUE Guangqiao, HE Yingdao, et al. Analysis of Vibration Propagation Mechanisms in High-speed Railway Shield Tunnels with Single-Tube Double-Track Configuration[J]. Railway Standard Design, 2025, 69(5): 1-8. DOI: 10.13238/j.issn.1004-2954.202501130008.
针对高速铁路单洞双线盾构隧道的振动传播问题,建立轨道-隧道-场地的2.5维有限元-基本解耦合模型,采用有限元模拟轨道与盾构隧道结构,结合弹性空间格林函数表征围岩介质。通过计算移动轮轨力作用下的动力响应,结合弹性波理论分析振动传播规律。结果表明:隧道上方场地的竖向振动由顶部纵波主导,两侧竖向振动由横波控制;当土层波阻抗从隧道围岩向地表递减时,隧道顶部扩散的柱面纵波经土层界面后趋近平面波特性,侧方横波经界面透射后竖向位移分量显著降低。单洞双线隧道振动分布呈现显著频率相关性:低频振动(0~20 Hz)在隧道正上方地表响应最大,高频振动(40~80 Hz)在偏离隧道中心线一定距离处达到峰值。隧道结构对20 Hz以上振动产生遮挡效应,导致下方围岩振动向上绕射衰减。地表竖向位移分布由频率相关的隧道辐射模式控制,分层土中的波阻抗变化使纵波成为地表振动主导成分。研究揭示了单洞双线盾构隧道振动传播的三维空间特性,明确了低频振动集中传播与高频振动侧向辐射的差异化规律,为城市高铁隧道减振设计提供理论依据。
To address the issue of vibration propagation in single-tube double-track shield tunnels for high-speed railways
a 2.5-dimensional finite element method-method of fundamental solution (2.5D FEM-MFS) model for track-tunnel-site system was developed. This model employed finite elements to simulate the track and shield tunnel structures
while elastic space Green's functions characterized the surrounding rock medium. By calculating the dynamic response under moving wheel-rail forces and analyzing vibration propagation patterns through elastic wave theory
the mechanisms were investigated. The results indicated that the vertical vibration above the tunnel was dominated by P-waves from the tunnel crown
while the vertical vibration from sidewalls was governed by S-waves. When the soil layer's wave impedance decreased from the tunnel periphery to the ground surface
cylindrical P-waves diffusing from the tunnel crown gradually approached plane wave characteristics after passing through soil layers
while transmitted S-waves exhibited a significant reduction in vertical displacement components. The vibration distribution in single-tube double-track tunnels demonstrated notable frequency-dependent characteristics. Low-frequency vibrations (0 to 20 Hz) exhibited maximum surface responses directly above the tunnel
whereas high-frequency vibrations (40 to 80 Hz) reached their peak at a lateral offset from the tunnel centerline. The tunnel structure induced a shielding effect for vibrations above 20 Hz
leading to diffraction-induced attenuation of upward-propagating vibrations in the surrounding rock. Surface vertical displacement patterns were governed by frequency-dependent tunnel radiation modes
with P-waves as the dominant contributor to ground vibrations due to wave impedance variations in layered soils. This study reveals the three-dimensional spatial characteristics of vibration propagation in single-tube double-track shield tunnels
clarifies the differentiated mechanisms of concentrated low-frequency propagation versus lateral high-frequency radiation
providing a theoretical basis for vibration reduction design in urban high-speed railway tunnels.
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