城市轨道交通引起的地面振动传播研究  

The Study of the Spread of Ground Vibration Caused by Urban Rail Transit

作　　者：张逸静[1] 陈甦[1] 王占生[2] 

机构地区：[1]苏州大学城市轨道交通学院,江苏苏州215137 [2]苏州市轨道交通集团有限公司,江苏苏州215003

出　　处：《防灾减灾工程学报》2017年第3期388-395,共8页Journal of Disaster Prevention and Mitigation Engineering

基　　金：苏州市轨道交通集团有限公司项目(SZZG06YJ1030009);苏州市科技局项目(SS201519)资助

摘　　要：对苏州轨道交通2号线引起的地面振动采用加速度传感器进行实测,研究其传播规律,并通过有限元软件建立了隧道-土层三维模型,模拟了轨道交通所引起的不同距离地面振动响应,并与实测数据进行了对比验证。结果表明:轨道交通在圆曲线段引起的地面水平振动加速度有效值在距离隧道中心线12m以内的范围内是竖向振动加速度有效值的2倍左右,在12m范围以外地面水平和竖向振动加速度有效值大小相当;轨道交通对距离隧道中心线25m以外的地面水平振动加速度已无明显影响,而竖向振动的影响更远;轨道交通在圆曲线段引起地面水平振动的主要频率为30~125Hz。轨道交通引起地面竖向振动的主要频率为40~100Hz。竖直方向在6~12m范围内存在振动放大区,10Hz以下的低频水平方向上的振动在距离隧道中心线12~17m范围内放大,提示地铁周围这一范围内的建筑需要特别关注。Measuring the ground vibration caused by Suzhou Rail Transit Line 2 with acceleration sensor we study its propagation law.The 3 Dmodel of tunnel soil layer is established by finite element software.The ground vibration responses caused by rail traffic are simulated and compared with the measured data.The results show that：the horizontal vibration acceleration caused by rail transit in circular curve segment is 2 times than the vertical vibration acceleration within the range of 12 mfrom the center line of the tunnel.Outside the range,the two is same.Rail traffic has no significant effect on the horizontal vibration acceleration,but the impact of vertical vibration is farther.30-125Hz is the major frequency of horizontal vibration in circular curve.40-100Hz is the major frequency of vertical vibration.There is an enlarged area of vertical vibration in the range of 6-12m.Low frequency vibrations below 10 Hz in horizontal direction is enlarged within a distance range of 12-17m.Building around subway in this range requires special attention.

关 键 词：轨道交通 地面振动 实测验证 有限元分析 

分 类 号：U231.1[交通运输工程—道路与铁道工程]