地铁车辆段咽喉区地面振动传播规律实测与分析  

Field measurement and analysis of ground vibration in the throat area of metro depot

作　　者：邹超[1] 汪益敏[1] 汪朝晖[2] 曾泽民[1] 何涛[2] 

机构地区：[1]华南理工大学土木与交通学院亚热带建筑科学国家重点实验室,广州510640 [2]广州市地下铁道总公司,广州510380

出　　处：《振动与冲击》2015年第16期200-206,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(50808086);广州市地下铁道总公司科研项目(J11ZZ090008)

摘　　要：实测广州地铁3号线厦滘车辆段咽喉区直、曲线段列车运行引起的周围地面振动影响,分析列车引起地面振动加速度在时、频域内的传播规律。结果表明,咽喉区直线段在轨道35 m范围内,地面竖向振动加速度级为72~95d B,略大于水平振动加速度级62~95 d B;咽喉区曲线段在轨道25 m范围内,地面竖向振动加速度级为70~98 d B,略小于水平振动加速度级80~98 d B;对地铁车辆段咽喉区临近的环境振动评价时,应同时考虑水平、竖向振动影响;中高频振动随距离增加衰减速度较低频快,咽喉区列车运行引发的振动传递到临近建筑物时主要频率成分为4~60 Hz。建议在车辆段减振措施设计时应重点考虑中低频振动的减振方案;在路基外侧沿轨道方向结合排水设施设置明沟利于减弱车辆段列车运行引发的振动传播。Field measurements were carried out at Xiajiao Metro Depot of Guangzhou Metro Line 3 moving trains on the straight section and curved section of throat area. The propagation of ground vibration subjected to acceleration induced by metro trains passing the throat area was investigated in the domains of time and frequency. The conclusion is that the ground vertical vibration acceleration level is 72 ~ 95 dB during trains running on straight section in the region of 35 m from the train running track, while the ground horizontal vibration acceleration level is 62 ~ 95 dB. The vertical vibration is stronger than the horizontal vibration slightly. However, during trains running on curved section in the region of 25 m from the train running track the ground horizontal vibration acceleration level is 80 ~ 98 dB and is stronger than the ground vertical vibration acceleration level which is 70- 98 dB. The horizontal vibration and vertical vibration should be simultaneously considered in the evaluation of environmental vibration near the throat area of metro depot. The attenuation rate of the medium-high frequency vibration is larger than that of the low frequency vibration, and the main frequency of vibration transmitting to adjacent buildings is mainly within 4 - 60 Hz. It is suggested that low and medium frequency vibration should be primarily taken into account in the vibration mitigation measure for metro depot. The open trench which is used for drainage along the direction of the track can reduce the vibration.

关 键 词：地面振动 车辆段 咽喉区 现场测试 传播规律 

分 类 号：U231[交通运输工程—道路与铁道工程] X839.1[环境科学与工程—环境工程]