兴延高速浇花峪隧道爆破振动测试分析研究

民爆库

摘要：  
为研究施工过程中隧道初期支护衬砌在爆破作用下的振动规律,基于兴延高速公路浇花峪隧道上台阶爆破工程,在距离掌子面38 m处开始设置传感器,并在拱顶、拱腰和边墙处分别安装1个传感器,监测掌子面推进过程中隧道衬砌的爆破振动速度.利用萨道夫斯基公式的非线性回归分析方法对振速的3个分量进行分析,得出:1)拱顶振速大于拱腰振速,且均大于边墙振速;2)拱顶振速的垂直方向、水平径向和水平切向分量拟合出的爆破衰减系数K、α均大于其他测试位置相应方向分量拟合出的K、α,且垂直方向的振速最大.对拱顶、拱腰和边墙3个位置处的主频进行回归分析,由回归得到的K值发现,隧道不同位置处的振动主频存在的关系为:f拱顶 >f边墙 >f拱腰.通过小波能量分析可知,拱腰处的频率成分相对较丰富且频带宽度较大,拱腰和边墙处的低频成分能量占比远高于拱顶,且拱腰处的低频能量最高.
Abstract：  
In order to study the blasting vibration rules of lining structure of Jiaohuayu Tunnel on Xingyan Expressway in Beijing during blasting construction of top heading,the blasting vibration velocity of the tunnel lining during advancing of tunneling face is monitored by setting a sensor on crown top,hance and sidewall respectively 38 m behind tunneling face. Three components of blasting vibration velocity are analyzed by Sodev's nonlinear regression analysis method. Some conclusions are drawn as follows:1)The vibration velocity of crown top is the largest,followed by that of hance,and that of sidewall is the smallest. 2)The fitting parameters K and α of blasting vibratian velocity of crown top along vertical direction,horizontal radial direction and horizontal shear direction are larger than those of hance and sidewall; and the vibration velocity along vertical direction is the largest. The regression analysis is carried out on the basic vibration frequency in crown top, hance and sidewall; and the regression parameter K shows that the basic vibration frequencies in different positions show a relationship of fcrown top>fsidewall>fhance. The wavelet energy analysis shows that the frequency components in hance are relatively abundant and the bandwidth is wide; the low frequency component energy in hance and sidewall position is much higher than that in crowan top;and the low frequency energy in hance is the highest.
doi：  10.3973/j.issn.2096-4498.2018.02.010  
作者：  江雅勤  [1]刘殿书  [1]武宇  [1]谢烽  [2]袁达  [1]张会歌  [1]  
Author：  JIANG Yaqin  [1]  LIU Dianshu  [1]  WU Yu  [1]  XIE Feng  [2]  YUAN Da  [1]  ZHANG Huige  [1]  
作者单位：  中国矿业大学(北京)力学与建筑工程学院,北京,100083  北方爆破科技有限公司,北京,100089  
刊  名：  隧道建设（中英文）ISTICPKU  
Journal：  Tunnel Construction  
年，卷(期)：  2018, 38(2)  
分类号：  U45  
关键词：  隧道爆破  振动规律  振动主频  小波分析  
Keywords：  tunnel blastingvibration rulesbasic vibration frequencywavelet analysis  
在线出版日期：  2018年4月23日  
基金项目：  国家自然科学基金项目，中央高校基本科研业务费专项资金项目，教育部博士点基金资助项目  

原文网址：

1. http://d.old.wanfangdata.com.cn/Periodical/sdjs201802010

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