平行双隧道在不同列车荷载作用下动力响应分析  

Dynamic Response Analysis of Parallel Double⁃line Tunnels Under Different Train Loads

作　　者：武林 汪佳燕 黄姚威 边晓亚 刘辉 WU Lin;WANG Jiayan;HUANG Yaowei;BIAN Xiaoya;LIU Hui(School of Civil Engineering and Architecture,Wuhan Institute of Technology,Wuhan,Hubei430073,China)

机构地区：[1]武汉工程大学土木工程与建筑学院,湖北武汉430073

出　　处：《施工技术(中英文)》2025年第6期8-14,99,共8页Construction Technology

基　　金：国家自然科学基金(52208403,52078396)。

摘　　要：受地下空间限制,城市地铁双线隧道间距较小,运营期双隧道列车运行时易产生相互影响。为研究近间距平行地铁双隧道中列车不同荷载对相邻隧道的动力影响,基于颗粒流分析程序PFC2D建立双隧道模型。模拟在左隧道中单节列车处于正常荷载(62.4kN)、超载1(92.0kN)和超载2(121.6kN)3种工况下,得到右隧道钢轨和管片各监测点的位移与速度时程曲线图,通过比较各监测点的纵向和横向位移及速度得出不同列车荷载对相邻隧道的动力影响。结果表明:3种工况下,钢轨和管片动力响应的最大点均发生在靠近隧道1振源一侧,且3种工况下各监测点的竖向动力响应约为水平动力响应的3倍;左隧道内列车超载1会显著增大右隧道各监测点的动力响应,但列车荷载的增加对右隧道动力响应的增幅作用逐渐衰减,呈非线性关系;超载2(121.6kN)会引起右隧道管片的不均匀位移,在靠近左隧道一侧位移增量最大。因此,应重视近间距平行双隧道列车超载对相邻隧道的动力响应,尤其是右隧道中靠近左隧道一侧。Due to the limitation of underground space,the distance of double⁃line tunnels for urban subway is small,and it is easy to interact with each other during the operation of double⁃tunnel trains.To study the dynamic response of the trains with different loads on adjacent tunnels in parallel double⁃line tunnels with short distances,the double⁃line tunnel model was established based on the particle flow analysis program PFC2D.Three conditions of normal load(62.4kN),overload 1(92.0kN)and overload 2(121.6kN)of a single train in the left tunnel were simulated.By setting monitoring points on the rail and segment of the right tunnel,the displacement and velocity time⁃history curves of the rail and segment of the right tunnel under three conditions were obtained.By comparing longitudinal and transverse displacement and velocity of each monitoring point,the dynamic influence of different train loads on adjacent tunnels was obtained.The results show that under the three working conditions,the maximum point of the dynamic response of the rail and the segment occurs on the side near the tunnel 1 vibration source,and the vertical dynamic response of all monitoring points is about three times that of the horizontal dynamic response.The overloading of the train in the left tunnel can significantly increase the dynamic response of the monitoring points in the right tunnel,but the increasing effect of the train load on the dynamic response of the right tunnel will gradually decrease,showing a nonlinear relationship.Overload 2(121.6kN)will cause uneven displacement of the right tunnel segment,and the displacement increment near the left tunnel is the largest.As a result,attention should be paid to the dynamic response of overloaded trains to the adjacent tunnels in parallel double⁃line tunnels with close distance,especially near the left tunnel.

关 键 词：隧道 地铁 超载 颗粒流方法 动力响应 

分 类 号：U451[建筑科学—桥梁与隧道工程]