隧道爆破作用下建筑物振动响应分析--以青岛地铁四线大断面隧道为例  

Analysis of the Vibration Response of Buildings under Tunnel Blasting:A Case Study of the Four-line Large Section Tunnel of Qingdao Metro

作　　者：丁新宇 王海亮[1] 李延民 李维洲 李占海[4] DING Xin-yu;WANG Hai-liang;LI Yan-min;LI Wei-zhou;LI Zhan-hai(College of Safety and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266590,China;CIECC Engineering Company Limited,Beijing 100037,China;China Communications Construction Company,Qingdao 266000,China;College of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学安全与环境工程学院,青岛266590 [2]中咨工程有限公司,北京100037 [3]中国交通建设股份有限公司,青岛266000 [4]山东科技大学能源与矿业工程学院,青岛266590

出　　处：《科学技术与工程》2021年第35期15215-15221,共7页Science Technology and Engineering

基　　金：国家自然科学基金(10672091)。

摘　　要：依托青岛地铁1号线四线大断面隧道工程,使用8台TC-4850测振仪对隧道下穿的一栋7层砖混结构建筑物进行了长期监测。通过分析数据,结合Hilbert-Huang变换(HHT)方法研究了建筑物的振动响应规律。结果表明:振速随楼层升高先减小后略微增大,在顶层表现出放大效应。垂直向峰值振速无法反映建筑物高层的受震情况。随着楼层升高,主频呈现振荡下降趋势,爆心距越大,主频衰减越明显。距掌子面3~10 m范围内空洞效应最显著,已开挖区的地表振速大于未开挖区。垂直向爆破振动信号的Hilbert谱呈现明显的多峰值结构,频率分布在20~250 Hz,已开挖区的频带范围比未开挖区有所降低。研究成果对隧道爆破振动控制及建筑物保护具有参考价值。Relying on the four-line large section tunnel engineering of Qingdao Metro Line 1,8 sets of TC-4850 vibration meters were used to monitor the 7-story brick-concrete construction under the tunnel for long-term monitoring.Through analyzing the data,combined with the Hilbert-Huang transform(HHT)method,the vibration response laws of the building was studied.The results show that the vibration velocity decreases first and then increases slightly with the rise of the floor,showing amplification effect on the top floor.The vertical peak vibration velocity cannot reflect the vibration of the high-rise building.As the floor rises,the main frequency shows a downward trend of oscillation.The larger the burst center distance,the more obvious the main frequency attenuation.The hollow effect is the most significant in the range of 3~10 m from the tunnel face,the vibration velocity in excavated area is greater than that in unexcavated area.The Hilbert spectrum of the vertical blasting vibration signal presents an obvious multi-peak structure,with a frequency ranging from 20 to 250 Hz.The frequency range of the excavated area is lower than that of the unexcavated area.The research results have reference value for tunnel blasting vibration control and building protection.

关 键 词：地铁隧道 爆破振动 空洞效应 砖混结构 Hilbert-Huang变换(HHT)分析 

分 类 号：U455.6[建筑科学—桥梁与隧道工程]