地铁列车运行时引起的隧道内振动荷载研究  

Analysis of metro vibration load excited on the tunnel induced by moving trains

作　　者：黄强 刘干斌 万灵[2] 朱瑶宏 黄宏伟[3] HUANG Qiang;LIU Ganbin;WAN Ling;ZHU Yaohong;HUANG Hongwei(Institute of Geotechnical Engineering,Ningbo University,Ningbo 315211,China;School of Engineering,Jiangxi Agricultural University,Nanchang 330045,China;Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]宁波大学岩土工程研究所,浙江宁波315211 [2]江西农业大学工学院,江西南昌330045 [3]同济大学地下建筑与工程系,上海200092

出　　处：《铁道科学与工程学报》2020年第5期1209-1218,共10页Journal of Railway Science and Engineering

基　　金：国家自然科学基金重点资助项目(51538009);宁波市自然科学基金资助项目(2019A610399)。

摘　　要：地铁环境振动研究首先需要确定隧道内的振动荷载。针对以往采用的解析计算模型确定地铁振动荷载时对列车、轨道、地基各子模型的影响研究不够,基于车辆-轨道-隧道-地基模型对此进行详细分析。研究结果表明:不考虑轨道不平顺时,列车可以直接简化为移动点荷载,考虑轨道不平顺时,不同列车模型确定的地铁振动荷载差别不大,但轮轨力存在一定差异,列车最好采用整车模型。整体式轨道的地铁振动荷载最大,有砟轨道次之,浮置板轨道最小。浮置板可以有效减少地铁振动荷载的幅值和频率,但随着浮置板长度增加振动荷载趋于恒定。地基模型对地铁振动荷载影响很小,地基可直接简化为Winkler模型。对计算模型中不同子模型的影响进行分析,可为地铁振动荷载的确定提供一定的参考。Metro vibration load should be determined first before studying train-induced vibration. Previous analytical models rarely consider the effects of submodels of train, track, and subgrade in determining the metro vibration load. In the present study, effects of those submodels were extensively investigated using the train-track-tunnel-subgrade model. It indicates that when track irregularity is not considered, the train can be directly equivalent as point loads. Instead, when the track irregularity is considered, the metro vibration loads from different train models are similar while the wheel-rail force shows discrepancy to some extent. In such case, the metro train should better be simplified as the whole train model. Metro vibration load from fixed-track is maximum, from the ballast-track is second, and from the floating slab track is minimum. The floating slab track can effectively reduce the amplitude and frequency of metro vibration load, but as the slab length increases, the metro vibration load finally becomes constant. The subgrade models play little effect on the metro vibration load and can be simplified as Winkler model directly. By analyzing the effects of submodels in the analytical model, it may provide some guidance on the determination of the metro vibration load.

关 键 词：地铁振动荷载 列车模型 轨道类型 地基模型 轨道不平顺 

分 类 号：U211.4[交通运输工程—道路与铁道工程]