铁道标准设计2025，Vol.69Issue(5)：1-8,42,9.DOI:10.13238/j.issn.1004-2954.202501130008
高速铁路单洞双线盾构隧道的振动和传播规律分析
Analysis of Vibration Propagation Mechanisms in High-speed Railway Shield Tunnels with Single-Tube Double-Track Configuration
摘要
Abstract
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.关键词
盾构隧道/环境振动/2.5维有限元-基本解/弹性波/单洞双线隧道/高速铁路Key words
shield tunnel/environmental vibration/2.5D finite element method-method of fundamental solution(2.5D FEM-MFS)/elastic waves/single-tube double-track tunnel/high-speed railway分类
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肖明清,薛光桥,何应道,徐晨,徐巍,王春晖..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):1-8,42,9.基金项目
山东省自然科学基金项目(ZR2024QE148) （ZR2024QE148）
广东省基础与应用基础研究基金项目(2023A1515111138) （2023A1515111138）
中铁第四勘察设计院集团有限公司科技研究开发计划课题(KY2023035S) （KY2023035S）
