上海闵浦二桥段轨道减振降噪的研究与应用

Study on Track Vibration and Noise Reduction of Rail Transit of Shanghai Second Minpu Bridge Section

在轨道交通高架线上,由于早期桥梁设计的恒载有限,所以常用的措施往往是安装阻尼钢轨或者更换减振扣件。针对上海轨道交通5号线南延伸工程闵浦二桥段环境影响矛盾突出、桥梁二次恒荷受限等问题,研究比选了各种类型的减振降噪措施,推荐应用符合环保要求、减振降噪效果良好的轻型钢弹簧浮置板结构。

On the elevated section of rail transit line,the installation of damping rail or replacement of vibration fastener has become common measure due to the limited design load of the early designed bridge.In the Second Minpu Bridge section of the south extension project of Shanghai Rail Transit Line5,the bridge second load is limited.Based on the comparison of various vibration and noise reduction measures,the light steel spring floating slab structure is recommended which not only accords with environmental protection requirements but also has good damping effect.