地铁相邻地下建筑振级评定试验与分析

Test and Analysis on Vibration Level Assessment for Underground Construction Adjacent to Metro

采用嵌入式环境振动智能监测系统,获得了紧邻地铁车站的地下商业建筑楼板铅垂向加速度时程谱与傅里叶谱。对优势频率振动能量衰减规律进行了拟合分析,获得了二次振动影响范围;通过铅垂向Z振级计算,对该地下建筑环境振动状况作出了评价,并给出了振级随距离衰减关系的数学模型。研究成果可为类似工程提供参考依据。

Using embedded environmental vibration smart monitoring system, floor vertical acceleration time history spectrum and Fourier spectrum are acquired for underground commercial building adjacent to metro station. Simulation and matching analysis are carried out on the dominant frequency vibration energy attenuation pattern, resulting in the sphere of influence of the secondary vibration. Through plumb Z vibration level computing, ambient vibration conditions of underground construction are evaluated, and the paper gives a mathematical model illustrating relations between vibration levels of attenuation with distances.