地下线路橡胶减振垫轨道减振性能研究  

Study on Vibration Damping Performance of Underground Railway Track with Rubber Vibration-Damping Pad

作　　者：赵留辉 

机构地区：[1]中铁第一勘察院设计集团有限公司,西安710043

出　　处：《铁道标准设计》2014年第8期44-47,共4页Railway Standard Design

基　　金：铁道部科技研究开发计划项目(2011G009)

摘　　要：为了得到地下线路采用橡胶减振垫轨道的减振效果,建立车辆—轨道—隧道—土层—建筑物的三维有限元-无限元耦合模型,分别计算采用普通整体道床轨道和橡胶减振垫轨道2种工况下沿线建筑物的三向振动加速度振级。结果表明:列车运行引起的建筑物振动,以垂直于线路方向的横向振动为主,其次为垂向振动,平行于线路方向的纵向振动最小;采用橡胶减振垫轨道后,楼柱节点的横向、纵向加速度振级明显减小,且随着距地面高度的增高,降幅基本一致,约为8.9 dB;采用普通整体道床轨道和橡胶减振垫轨道时,楼板垂向振动规律基本一致,即随着楼层的增加,楼板垂向振动呈现先减后增的趋势,但是差别甚小。与普通整体道床轨道相比,橡胶减振垫轨道可以降低楼板垂向加速度振级约9 dB。In order to ascertain the vibration damping effect of underground railway track with rubber vibration-damping pad, a three-dimensional finite element and infinite element coupling model of vehicle-track-tunnel-soil-building system was established, and the vibration levels of the three-direction vibration accelerations of the building along the underground railway were calculated respectively under the two working conditions：the track which came with ordinary monolithic track bed and the track which came with rubber vibration-damping pad. The results show that： （ a ） Among the building vibrations caused by train running, the transverse vibration perpendicular to the track direction is the dominant one, followed by the vertical vibration, while the longitudinal vibration parallel to the track direction is the smallest. （ b ） When using the track with rubber vibration-damping pad, the vibration levels of the transverse and longitudinal accelerations of the column nodes of the building will considerably decrease;and the decreasing will be almost the same with the increasing of the height to the ground surface and will be about 8. 9dB. （c）The building floor slabs＇ vertical vibration patterns which are obtained respectively by using the track with ordinary monolithic track bed and by using the track with rubber vibration-damping pad, are basically the same;namely, the building floor slab＇s vertical vibrations will present a trend of decreasing at first and then increasing as the building storey increases, but the difference will be very small. （ d ） Compared with the track which comes with ordinary monolithic track bed, the tack which comes with rubber-damping pad can decrease the vibration level of vertical acceleration of the floor slab by about 9 dB.

关 键 词：整体道床轨道 橡胶减振垫轨道 振动 减振效果 

分 类 号：U213.241[交通运输工程—道路与铁道工程]