地下线路橡胶减振垫轨道减振性能研究.pdf

第58卷第8期铁道标准设计0.58 No82014年8月RAILW A Y STTANDARD DESIGNAug,2014文章编号:1004-2954(2014)08-0044-04地下线路橡胶减振垫轨道减振性能硏究赵留辉(中铁第一察院设计集团有限公同,西安710043)摘要:为了得到地下线路采用橡胶减振墊轨道的减振效果,建立车辆一轨道一隧道一土层一建筑物的三维有限元一无限元耦合模型,分别计算采用普通整体道床軌道和橡胺减振墊轨道2种工况下浯线建筑物的三向振动加遠度振级。结果表明;列车运行引起的建筑物振动,以垂直于线路穸向的横向振动为主,其次为垂向振动,平行于线路方向的纵向振动最小;采用榢胶减振垫轨道后,楼柱节点的横向、鈥向加速度振级明配减小,且随着距地面高度的增高,降幅基本一致,约为8.9dB;采用普通整体道床轨道和橡腋减振墊軌道时,楼板垂向振动规律基本一致,即随着楼层的增加,楼板垂向振动星现先减后增的趋势,但是差别甚小。与普通螯体道床轨道相比,橡胶减振兿轨道可以降低機板垂向加遠度振级约9dB。关词:整体道床轨道;橡胶减振垫轨道;振动;减振效果中图分类号:U213.241文献标识码:ADol:10.13238/j.issn.1004-2954.204.08.010Study on Vibration Damping Performance of Underground RailwayTrack with Rubber Vibration-damping PadZHAO Liu-hui(Chin&Design Institute Group CXjan7004Abstract: In order to ascertain the vibration damping effect of underground railway track with rubbervibration-damping pad, a three-dimengional finite element and infinite element coupling model owvehicle-traek-tunnel-soil-building system was established, and the vibration levels of the three-directionvibration accelerations of the building along the underground railway were calculated respectively underthe two working conditions: the track which came with ordinary monolithic track bed and the track whichame with rubber vibration-damping pad. The results show that: (a) Among the building vibrationsaused by train running, the transverse vibration perpendicular to the track direction is the dominant one,followed by the vertical vibration, while the longitudinal vibration pack direction is thsmallest. (b)When using the track with rubber vibration-damping pad, the vibration levels of thetransversbe and longitudinal accelerations of the column nodes of the building will considerably decrease;and the decreasing will he almost the same with the inereasing of the height to the ground surface and willbe aboul 89db. (e)The building floor slubs vertical vibration patterns which are obtained respectivelyby using the track with ordinary monolithic track bed and by using the track with rubber vibrationdamping pad, are basically the same; namely, the building floor slabs vertical vibrations will present atrend of decreasing at first and thenmn.reg1ing as the building storey increases, but the difference will bevery small. (d )Compared with the track which comes with ordinary monolithic track bed, the Lackwhich comes with rubber-damping pad can decrease the vibration level of vertical acceleration of the floorslab by about 9 db收稿日期:2013-12-23;修回臼期:2014-l基金项目:铁道部科技研究开发计刘项月(2011G009作者简介:赵留辉),男,高级工程师,E-nal: zhaolin