摘要
随着城市建设发展,城市轨道交通引发的场地振动已经严重影响到人们的日常活动和实验室精密仪器的使用,因此,有必要开展交通荷载引起振动的减振措施研究。已有研究表明,WIB(即Wave Impeding Block-波阻块)对于地表荷载引起的振动有较好的隔振效果。本文探讨WIB对地铁荷载引起振动的减振效果,建立了列车-隧道-地基的计算模型,其中,将地铁移动荷载简化为沿隧道向前移动的移动荷载列,计算了埋设WIB前后场地土的振动,对比分析了WIB的埋深对减振效果的影响。结果表明,WIB对于地铁运行产生的低频振动,具有良好的减振效果。
With the development of city constructions, ground vibrations induced by city track traffic have brought more and more bad influence on the normal daily life of people and some precise instruments in labora- tories. So it is necessary to study the mitigation measurement of the ground vibration induced by traffic loads. It has been identified that WIB is an effective method for mitigating the vibration induced by the surface load. The mitigation effect of WIB for the vibration induced by the subway is studied in this paper. The calculation model of train, tunnel and ground is established, the train load is simplified as moving dynamic load series a- long the tunnel, the ground vibration with WIB and without WIB are calculated, and the mitigation effects of WIB with different depth are studied. The conclusions are drawn that the ground vibration, especially low- frequency vibration induced by subway can be reduced greatly after WIB is setup.
出处
《华中科技大学学报（城市科学版）》
CAS
2009年第2期1-4,共4页
Journal of Huazhong University of Science and Technology
基金
武汉市建设科研项目(200719)
关键词
地铁
低频振动
减振
WIB
subway
low-frequency vibration
vibration mitigation
WIB
