橡胶混凝土道床动力特性的足尺实验分析

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (16) : 249-254.

论文

橡胶混凝土道床动力特性的足尺实验分析

金浩1，田清荣2，李政2

作者信息 +

Full-scale experiment on dynamic characteristics of tunnel invert using rubberized concrete

JIN Hao1, TIAN Qingrong2, LI Zheng2

Author information +

文章历史 +

摘要

随着大量地铁线路的开通运营，轨道振动问题日益受到关注。本文针对橡胶混凝土道床，构建足尺实验平台。通过动力实验，对2%橡胶混凝土道床和普通混凝土道床进行频谱、振动加速度级、传递损失、插入损失、分频振级均方根差值等评价指标分析，得出以下结论：（1）橡胶混凝土道床的减振频段主要为1~63Hz低频段。（2）1~200Hz频段，采用橡胶混凝土道床的传递损失普遍大于普通混凝土道床。（3）1~100Hz频段，采用橡胶混凝土道床的隧道壁插入损失普遍为正值。（4）对比橡胶混凝土道床和普通混凝土道床，隧道壁测点的分频振级均方根差值约1.9dB。本文为橡胶混凝土道床在地铁中应用提供了实验数据支撑。
关键词：地铁；轨道振动；橡胶混凝土；道床；足尺实验

Abstract

With the opening and operation of a large number of subway lines, the problem of railway vibration has been paid more and more attention. In this paper, a full-scale platform of tunnel invert is constructed. Through the vibration experiment, vibration acceleration spectrum, vibration acceleration level, transfer loss, insertion loss was analyzed. The results show that: (1) the vibration reduction frequency of rubberized concrete is mainly in 1 to 63Hz. (2) In 1 to 200Hz, the transfer loss of rubberized concrete is generally greater than that of traditional concrete. (3) In 1 to 100Hz, the insertion loss of rubberized concrete is generally positive. (4) Compared rubberized concrete and traditional concrete, the difference of mean square root of vibration level at the tunnel wall is about 1.9dB. This paper provides the experimental data for the application of rubberized concrete in subway.
Key words：Subway; Track vibration; Rubberized concrete; Tunnel invert; Full-scale experiment

导出引用

金浩1，田清荣2，李政2. 橡胶混凝土道床动力特性的足尺实验分析[J]. 振动与冲击, 2022, 41(16): 249-254

JIN Hao1, TIAN Qingrong2, LI Zheng2. Full-scale experiment on dynamic characteristics of tunnel invert using rubberized concrete[J]. Journal of Vibration and Shock, 2022, 41(16): 249-254

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