地铁列车运行引起的振动观测及对高精密仪器的影响

Observation for vibration caused by subway transit and effect on high precision instrument

随着城市轨道交通的快速发展,在方便民众出行的同时,轨道交通也显著改变铁路沿线地区环境振动背景。通过对北京地铁4号线、10号线特定地段列车通过时引起地面振动的对比,表明"浮置板道床"等目前的综合减振措施对地铁列车运行产生的高频振动有较为明显效果,但对低频振动的衰减效果有限。地铁4号线运行后,北京大学物理楼的环境振动显著增大,列车运行对物理楼的环境振动起着主导作用,特别是低频振动对高精密仪器有不同程度的影响。

with the rapid deveopment of urban rail transit ,it significantly changes the background of environmental vibration along the railway district while creating rtaffic convenience.comparing the testing data of ground vibration in specefic location arisen from subway transit between Beijing Metro Line 4 and Line 10,it indicates that current comprehensive measures for vibration attenuation ,such as “floating slab track bed”,etc .have distinct effect on high-frepuency vibration caused by subway train＇s operation,but limited impact on low-frepuency vibration attenuation.The environmental vibration of physics building located in peking University has remarkably increased after the running of Metro Line 4,which means the subway transit should play a leading role in above mentioned environmental vibration ,especially low-frequency vibration affect on high precision instruments of different level