爆破作用下砖混楼房振动效应试验研究  

Experimental Study on Vibration Effect of Brick-concrete Buildings under Blasting Action

作　　者：雷涛[1,2] 程瑞山 叶海旺 冉成[1,2] 赵亮 强小刚[4] 

机构地区：[1]武汉理工大学资源与环境工程学院,武汉430070 [2]矿物资源加工与环境湖北省重点实验室,武汉430070 [3]中南大学资源与安全工程学院,长沙410038 [4]大庆石油管理局射孔弹厂西北基地,咸阳713206

出　　处：《爆破》2017年第4期163-168,共6页Blasting

基　　金：湖北省自然科学基金青年基金(2016CFB336)

摘　　要：砖混楼房在爆破振动作用下发生破坏是工程中的常见现象。基于武汉阳逻港口某土石方爆破工程,进行了邻近砖混楼房的爆破振动测试,并结合自适应最优核时频和小波包方法,分析了爆破振动信号特性及振动能量分布特征,研究了爆破作用下砖混楼房的振动效应。结果显示:振动信号以80 Hz及以下的低频为主,且每层楼均有两个能量主要分布频带;随着楼层增高,振动总能量逐渐减小,主频持续时间逐渐增加,且x、y、z三个方向的主频向低频方向移动;同时,x、y方向与z方向振动特性变化规律存在差异,x、y方向能量区间缩小并且能量峰值逐渐降低,z方向能量区间则为先扩大后缩小,能量峰值为先增加后降低。The destruction of brick-concrete buildings under blasting vibration is a common phenomenon in engi- neering. Based on the rock blasting of Yangluo port in Wuhan, the blasting vibration test in near brick-concrete build- ings is carried out. By combining the adaptive optimal Kernel Time-Frequency and wavelet packet method, the char- acteristics of blasting vibration signal and the distribution of energy are analyzed. The vibration effect of brick-con- crete buildings under blasting is studied. Results show that the main vibration signal is low frequency less than 80Hz, and two main energy bands exist in each floor. With the rise of the floor,the total vibration energy decreases and the dominant frequency duration increases gradually. Furthermore, the dominant frequencies of x, y and z move towards the low frequency direction. Meanwhile, vibration characteristics of x ,y direction are different from z direction. Energy ranges of x ,y direction narrow and energy peaks reduce gradually. The energy range of z direction is firstly expanded and then reduced, and the peak energy increases firstly and then decreases.

关 键 词：爆破振动 砖混楼房 时频特性 边际谱 能量分布 

分 类 号：TD235[矿业工程—矿井建设]