虽然城市轨道交通的快速扩张为市民提供了便利,地铁振动问题不容忽视。本研究调查了法源寺历史文化保护区振动的空间分布特征。它涉及使用V001磁电加速度传感器,能够监测低振幅,灵敏度为0.298V/(m/s2),测量范围高达20m/s2,频率范围为0.5至100Hz,用于原位测试,分析该区域的振动传播规律,评估对建筑物的影响,并确定减振方案。根据原位测试过程中测量的垂直振动水平,将储备分为三个区域:严重过度,一般过度,和非过度振动。此外,研究建立了车辆-轨道-隧道-地层-结构的动力耦合模型,以验证钢丝弹簧浮板轨道和周期性桩排的阻尼效果。比较了三种减振方案的特点,即,内部减振重建,周期性桩排,以及建筑物的防振加固或重建,提出一个全面的解决方案。考虑到施工条件,困难,成本,和其他因素,建议定期排桩作为主要处理措施。如有必要,建筑物的抗振加固或重建可以作为补充措施。
Although the rapid expansion of urban rail transit offers convenience to citizens, the issue of subway vibration cannot be overlooked. This study investigates the spatial distribution characteristics of vibration in the Fayuan Temple historic and cultural reserve. It involves using a V001 magnetoelectric acceleration sensor capable of monitoring low amplitudes with a sensitivity of 0.298 V/(m/s2), a measuring range of up to 20 m/s2, and a frequency range span from 0.5 to 100 Hz for in situ testing, analyzing the law of vibration propagation in this area, evaluating the impact on buildings, and determining the vibration reduction scheme. The reserve is divided into three zones based on the vertical vibration level measured during the in situ test as follows: severely excessive, generally excessive, and non-excessive vibration. Furthermore, the research develops a dynamic coupling model of vehicle-track-tunnel-stratum-structure to verify the damping effect of the wire spring floating plate track and periodic pile row. It compares the characteristics of three vibration reduction schemes, namely, internal vibration reduction reconstruction, periodic pile row, and anti-vibration reinforcement or reconstruction of buildings, proposing a comprehensive solution. Considering the construction conditions, difficulty, cost, and other factors, a periodic pile row is recommended as the primary treatment measure. If necessary, anti-vibration reinforcement or reconstruction of buildings can serve as supplemental measures.