摘要
对上海在建地铁隧道盾构掘进及轨道铺设施工中运输车辆运行引起的环境振动进行了现场实测,分析了施工运输车辆运行引起隧道内振动的时频特性,并与地铁列车运行引起的振动进行了对比.实测结果表明：盾构电瓶车产生的隧道内振动卓越频段为10～100 Hz;而轨道车运行引起的隧道内振动卓越频段为40～100 Hz.轨道车在不同运行车速条件下的对比测试结果表明,所引起隧道内的振动随轨道车车速的增大而增大,当车速由5 km/h增至20 km/h时,道床和隧道壁的最大Z振级分别增大15 dB和11 dB.
On-the-spot experimental measurements of vibrations in metro tunnel have been undertaken in Shanghai,which are induced by transport vehicles during shield tunneling and track laying.The frequency domain of tunnel sections recorded in the running of transport vehicles is analyzed and compared with that of the metro trains.Results show that the dominating frequency content caused by shield battery car is situated in the frequency range of 10～ 100 Hz,and that caused by metro trains is about 40～ 100 Hz.In addition,a comparative measurement result about varying train speeds shows that higher speed will cuase higher vibration in the tunnel.When a test train runs at the speed from 5 km/h to 20 km/h,the maximum Z vibration level on the ballast bed and tunnel walls will increase to 15 and 11 dB respectively.
出处
《城市轨道交通研究》
北大核心
2014年第6期37-41,共5页
Urban Mass Transit
关键词
地铁施工
运输车辆
环境振动
频谱分析
metro construction
transport vehicle
environmental vibration
spectrum analysis
