宝兰客专路堤段环境振动响应分析

The Environmental Vibration Response Analysis of Baolan High-speed Railway Embankment Area

为缓解高速列车诱发的环境振动问题,基于宝兰客专路堤段环境振动现场测试试验,通过数值模拟研究高速铁路环境振动的动力响应及传播特性.结果表明:环境振动强度随着距线路中心线距离的增加呈衰减趋势,路堤的高度对环境振动起一定的减缓作用;列车运行速度越大,环境振动的振动强度越大;地基土含水率越大,环境振动的强度越大,当含水率达到15%后,环境振动强度不再增大;同时高速铁路路堤段环境振动强度在随距离衰减的过程中会出现振动反弹现象.

In order to alleviate the environmental vibration induced by high-speed trains,the dynamic response and propagation characteristics of environmental vibration of high-speed railway were studied with numerical simulation based on the field test of environmental vibration in the embankment section of Baolan high-speed railway.The results show that the environmental vibration intensity decreases with the increase of distance from the center line of the line,and the height of the embankment plays a certain role in alleviating the environmental vibration;the faster the train speed,the greater the vibration intensity of the environmental vibration;the greater the moisture content of the foundation soil,the greater the intensity of the environmental vibration.When the moisture content reaches 15%,the environment vibration will not increased any longer.At the same time,the environmental vibration intensity of high-speed railway embankment will rebound in the process of attenuation along the distance.