浮置板轨道结构在城市轨道交通减振降噪上的应用

随着城市轨道交通的快速发展,其引起的振动和噪声问题得到国内外的重视,如何采用有效的减振降噪措施降低振动的环境影响成为热点问题之一。浮置板轨道隔振措施在国外有几十年的历史,得到广泛的应用,并在近几年成功应用于我国的城市轨道交通系统。在目前的减振措施中,浮置板轨道减振效果最好,可达20~40dB。根据不同的分类方法,评述了浮置板轨道的种类及应用情况,运用动力学原理分析了浮置板轨道的隔振原理。详细介绍了浮置板轨道在国内外应用的实例和减振降噪实测结果,认为浮置板轨道结构是一种高效的减振降噪措施,具有广阔的发展前景。

Applications of Floating Slab Track Framework for Vibration and Noise Control in Urban Rail Traffic

With the rapid development of urban rail transit, the vibration and n oise produced attract people's great attention. How to effectively control the n oise and vibration becomes one of hot topics. The floating slab track has been m ade full use in foreign countries for decades and in China for several years. Am ong all the mitigation measures, the float track is the most effective one which could decrease the noise for 20～40 dB. The categories of floating slab track a re introduced according different categorizing methods and the vibration isolati on principle is analyzed referring to the principle of dynamics. Application exa mples of floating slab track and their effectiveness measured are introduced in detail. The conclusion is that the floating slab track framework is a highly eff icient measure with wide perspective of development.