上跨既有高铁隧道掘进爆破振动响应分析  

Analysis on Blasting Vibration Response of Tunnel Driving Overcrossing Existing High-speed Railway

作　　者：吴超 张锦才 尹孟林 谢佳新 WU Chao;ZHANG Jincai;YIN Menglin;XIE Jiaxin(Wuhan Metro Group Co.,Ltd.,Wuhan 430033,Hubei,China;Hubei Lianjiaotou Investment and Construction Co.,Ltd.,Wuhan 430000,Hubei,China)

机构地区：[1]武汉地铁集团有限公司,湖北武汉430033 [2]湖北联交投投资建设有限公司,湖北武汉430000

出　　处：《工程技术研究》2024年第24期23-25,共3页Engineering and Technological Research

摘　　要：文章以科学城隧道爆破开挖工程为依托,结合隧道内爆破振动监测与动力有限元数值计算方法,分析在建隧道掘进爆破振动对既有高铁隧道结构的影响。分析结果表明:实测爆破振动速度峰值2.98 cm/s远小于安全控制阈值,在建隧道掘进爆破施工方案合理、安全可靠。数值模拟计算的爆破振动速度波形及波峰分布与实测数据基本一致,数值计算结果可对爆破振动进行合理的模拟及预测。Based on the blasting excavation engineering of the Science City tunnel,combined with the blasting vibration monitoring in the tunnel and the dynamic finite element numerical calculation method,this paper analyzes the influence of the blasting vibration of the tunnel driving under construction on the existing highspeed railway tunnel structure.The analysis results show that the measured blasting vibration velocity peak value of 2.98 cm/s is far less than the safety control threshold,and the blasting construction scheme of tunnel driving under construction is reasonable,safe and reliable.The waveform and wave crest distribution of the blasting vibration velocity calculated by numerical simulation are basically consistent with the measured data,and the numerical calculation results can reasonably simulate and predict the blasting vibration.

关 键 词：科学城隧道 成渝高铁隧道 爆破开挖 振动速度 动力有限元 

分 类 号：U455.6[建筑科学—桥梁与隧道工程]