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中文摘要：
选择北京地铁5号线宋家庄-刘家窑区段，在更换减振扣件前后2次测试地铁正常运营引起的地面水平及垂向振动加速度，对其进行频谱分析；建立轨道-隧道-土层的三维有限元模型，利用实测数据，研究垂直于地铁线路方向不同距离的振动加速度响应规律。结果表明：地铁线路位于曲线段时，地面水平与垂向振动加速度峰值和有效值基本相等；在安装DTⅥ2扣件的轨道地段，地铁列车运营引起的地面主要振动频率为40-80Hz，在安装Vanguard扣件的轨道地段为20-40Hz，说明Vanguard扣件有较突出的减振效果；随着距地铁隧道中心线距离的增加，地面振动加速度响应表现出衰减的趋势，在离开隧道轴线一定距离处，存在地面振动加速度放大区，水平和垂向振动加速度放大区的位置有所不同。
英文摘要：
Songjiazhuang-Liujiayao section of Beijing Metro Line 5 was chosen to test the horizontal and vertical vibration acceleration on the ground caused by normal metro train operation. The test was conducted twice before and after changing the damping fasteners, and its spectrum was analyzed. 3D finite element model of track-tunnel-soil was built to study the response regularity of the vibration acceleration at different distance vertical to the metro track with the measured data. The results show that when the metro line is in the curve section, the peak and the RIMS value of the horizontal and vertical vibration will be the same on the ground. In the track section with DTⅥ2 fasteners, the dominant vibration frequency transferred to the ground is 40-80 Hz caused by metro train operation, and that of the track section with Vanguard fasteners is 20-40 Hz. It indicates that the vibration mitigation effect of Vanguard fastener is prominent. The acceleration response on the ground decays with the increasing distance away from the central line of the metro tunnel. At certain distance away from the axis of the tunnel, there is an amplification region of the ground vibration acceleration. The locations of the amplification regions for the horizontal and vertical vibration acceleration are different.
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同项目期刊论文
Solution of Moving-load Induced Soil Vibrations Based on the Betti-Rayleigh Dynamic Reciprocal Theor
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