列车运行引起周边环境振动的监测与分析

Monitoring and Analysis of the Surrounding Environment Vibration Caused by Running Train

利用振动传感器和测试仪器在某铁路线旁的小区对列车运行经过时引起的三个方向振动速度以及振动频率进行实测。通过对监测数据分析发现,其振动衰减规律的分析结果与通过监测列车运行引起振动加速度的分析结果是一致的。同时参考《爆破安全规程》中的相关安全允许振动速度标准以及运用"振动感觉与振动持续时间关系"的相关理论,确定了评价列车运行引起建筑物振动的安全允许振动速度,为评价轨道交通系统运行对邻近建筑物振动危害提供了一个新思路;最后,指出小幅度长久持续的振动对建筑物的破坏是不能被忽视的,需要进一步研究并采取合理措施来控制和减弱其危害。

Vibration sensors and test equipment are used to measure the vibration velocity and vibration frequency caused by running trains from three directions of a community adjascent to railway line. The monitoring data are analyzed, which show that the vibration attenuation law is consistent with the vibration acceleration caused by the running trains. Then, according to the related standards in the ＂Blasting Safety Regulations＂ and the＂ Relationship between Vibration Sensation and Vibration Duration＇theory, the safe vibration velocity standard for evaluating building vibration caused by the running trains is defined, which provides a new way of evaluating building vibration caused by rail transit system. Finally, the damage to buildings by small amplitude and long-lasting vibration is emphasized, further research is required, and reasonable measures are to be taken to control and weaken the vibration hazards.