敏感城区深基坑爆破振速控制参数优化  

Optimization of Blasting Vibration Velocity Control Parameters of the Deep Foundation Pit in a Complex Urban Area

作　　者：王冠 WANG Guan(Rail Transit Engineering Co.,Ltd.of China Railway 19th Bureau Group Co.,Ltd.,Beijing 101399,China)

机构地区：[1]中铁十九局集团轨道交通工程有限公司,北京101399

出　　处：《路基工程》2024年第6期157-162,共6页Subgrade Engineering

摘　　要：以穗莞深城际轨道交通深圳机场至前海段工程一标土建二工区西乡站为工程依托,采用数值模拟和现场监测相结合的方法,从振动速度方面研究爆破间隔时间、爆破装药量、爆破距离和起爆顺序对邻近建筑物的振动影响。结果表明:随着微差间隔时间的增加,建筑物振速峰值呈现出先增大后递减的规律,各测点曲线的波动表现出明显的周期性;爆破装药量与振速峰值呈正相关关系,对爆破振速的影响较大;爆破距离与振速峰值呈负相关关系;中间起爆和侧向起爆于监测位置产生的速度峰值相差较小,振动频率特征基本一致,对建筑物振速影响的差异较小。Based on the project of Xixiang Station in the second civil construction area of bid 1 of Shenzhen Airport to Qianhai section of Guangzhou—Dongguan—Shenzhen Intercity Rail Transit,the influence of blasting interval time,blasting charge quantity,blasting distance and blasting sequence on the vibration of adjacent buildings was studied from the aspect of vibration velocity by means of numerical simulation and field monitoring.The result shows that,with the extension of the millisecond delay time,the peak value of the vibration velocity of the building shows a law of increasing first and then decreasing,and the fluctuation of the curve of each measuring point is obviously periodical.The blasting charge quantity is positively correlated with the peak value of vibration velocity,having a great influence on the blasting vibration velocity.The blasting distance is negatively correlated with the peak value of vibration velocity.As far as the intermediate initiation and the lateral initiation are concerned,there is a small difference in the peak velocity measured at monitoring position,and their vibration frequency characteristics are basically the same,which has limited difference in the influence on the vibration velocity of the building is small.

关 键 词：地铁车站 深基坑 爆破设计 装药量 参数优化 

分 类 号：U455.6[建筑科学—桥梁与隧道工程]