首页期刊在线 2023年（第26卷）第3期

武汉地铁7号线行车荷载下越江公铁两用隧道结构动力响应分析

崔豪1,2刘晶3张志华1,2黄金权1,2聂文婷1,2

Structural Dynamics Response Analysis of Wuhan Metro Line 7 Rail-cum-Road Cross-river Tunnel under Metro Traffic Load

CUI HaoLIU JingZHANG ZhihuaHUANG JinquanNIE Wenting

作者信息:

1.1. 长江水利委员会长江科学院， 430010，武汉；
2.2. 水利部山洪地质灾害防治工程技术研究中心， 430010，武汉；
3.3. 水利部科技推广中心， 100038，北京
Affiliation:

Changjiang River Scientific Research Institute of Changjiang Water Resources Commission, 430010, Wuhan, China
关键词:

地铁;越江公铁两用隧道;行车荷载;结构动力响应;离散元模型
Key words:

metro;rail-cum-road cross-river tunnel;traffic load;structural dynamics response;discrete element model
DOI:

10.16037/j.1007-869x.2023.03.004
中图分类号/CLCN:

U451+.3； U459-5
栏目/Col:

学术专论

摘要:

以武汉地铁7号线越江公铁两用隧道为研究对象，建立了考虑地铁行车荷载的越江隧道(含钢轨、轨枕、管片及周边岩土体等)离散元模型。在该隧道某截面上选取14个测点，分析了地铁行车荷载下该截面各层混凝土板的局部动力响应及管片动力响应。结果表明：管片结构及各混凝土板对称点处的颗粒振动加速度呈对称分布；随着地铁行车荷载的施加，排烟道两侧与管片连接处、公路路面板中心区域的剪应力逐渐增大，易出现裂隙破坏；地铁行车荷载引起的振动波在管片内的传递以横向振动波和竖向振动波为主；地铁列车开始通过隧道截面时对隧道管片的影响最大。

Abstracts:

Taking Wuhan Metro Line 7 rail-cum-road cross-river tunnel as research object, a discrete element model of cross-river tunnel under metro traffic load (including rail, sleeper, segment and surrounding soil) is established. 14 measuring points are selected on a section of the tunnel, the local dynamics response and segment dynamics response of the concrete slabs in each layer of the section under metro traffic load are analyzed. Results show that the particle vibration accelerations at the symmetrical points of the segment structure and concrete slabs are symmetrically distributed; with the application of metro traffic load, the shear stress at the connection between both sides of smoke exhaust duct and segments and the central area of highway pavement slab increases gradually, which is prone to crack failure; the vibration wave caused by metro traffic load is mainly transmitted by transverse vibration wave and vertical vibration wave in the segment. The influence on the tunnel segment is the largest when the metro train starts to pass through the tunnel section.