爆破中实测地运动数据分析及应用  

Analysis and Application of Measured Ground Motion Data from Blasting

作　　者：宋诗谦 崔云霄[1] 周游 郭弦[1] 黄晓飞[1] SONG Shi-qian;CUI Yun-xiao;ZHOU You;GUO Xian;HUANG Xiao-fei(Institute of Northwest Nuclear Technology,Xi'an 710024,China)

机构地区：[1]西北核技术研究所

出　　处：《测控技术》2019年第9期56-61,共6页Measurement & Control Technology

摘　　要：针对爆破中由于控制措施不合理给施工带来的安全隐患及灾害问题,开展了两种爆破方式下地运动测试工作预估。以现场爆破试验实测数据为基础,分析了实测地运动数据的时域特征;利用FFT方法对爆破工作中的速度、加速度两种地运动信号进行了频谱分析,获得了不同爆心距处地运动信号频谱分布的规律;利用萨道夫斯基法对速度峰值进行了拟合。结果表明,两次爆破的速度和加速度数据在时频域上具有较高的一致性;距离爆心越远,其频率分布越集中在低频段;在比例药量为0.07~0.27(kg^-1/3m)内时,可以用得到的经验公式预估对速度峰值。In order to solve the potential risks and disasters caused by the unreasonable controlling measures during blasting,ground motion tests under two on-situ blasting methods were carried out.Based on ground motion data acquired from blasting tests,the time-frequency characteristics were analyzed.The FFT method is used to analyze the frequency spectrum of velocity and acceleration,and the general law of the spectrum distribution of ground motion signals at different blasting distances was obtained.The velocity peaks were fitted using the Sadolski method.The results show that the velocity and acceleration data of the two blastings are highly similar in the time-frequency domain,and frequency distribution concentrated in lower frequency band if the position is farther away from the detonation center.Empirical calculation formula of the peak velocity obtained by the Sadolski method can be used to estimate the peak velocity when the proportion of dosage is between 0.07 to 0.27(kg^-1/3m).

关 键 词：爆破 隧道施工 地运动 频谱分析 萨道夫斯基法 

分 类 号：U455[建筑科学—桥梁与隧道工程] O389[交通运输工程—道路与铁道工程]