FBG传感器监测钻爆对邻近隧道衬砌结构的影响  

Effect of drilling and blasting on structure of nearby tunnel lining monitored by FBG sensor

作　　者：王敏吉[1] 赵成均[1] 李川[1] 赵振刚[1] 谢涛[1] 李英娜[1] 

机构地区：[1]昆明理工大学信息工程与自动化学院,云南昆明650500

出　　处：《传感器与微系统》2014年第5期9-11,共3页Transducer and Microsystem Technologies

基　　金：云南省应用基础研究计划资助项目(2013FZ021)

摘　　要：新隧道的施工爆破产生的地震波会影响邻近既有隧道衬砌结构的安全和稳定。结合新建碧鸡关隧道实际工程，应用15只光纤Bragg光栅（FBG）表面应变传感器对既有碧鸡关隧道衬砌表面迎爆侧进行了8次爆破和3次列车通过时的应变监测，研究了爆破对邻近隧道衬砌表面应变变化的影响。2010年6月23日爆破药量为129kg，爆破量为中等，爆破对衬砌表面的应变产生了明显的波动影响，引起传感器在发生爆破前后出现数据突变，应变最大变化量在35×10-6-43×10-6之间。当列车通过碧鸡关隧道时，衬砌表面的应变变化较小，应变最大变化量在9×10-6-12×10-6之间。The seismic wave caused by blasting in new tunnel＇ s construction will influence safety and stability of adjacent existing tunnel lining structures. Combining new construction of Bi Ji Guan tunnel project and use strain sensors on 15 fiber Bragg gratings （FBG）surface to monitor strains, which caused by 8 times of blasts and 3 times of train gets through respectively of Bijiguan tunnel lining surface of the blasting side. Influence of blasts on strain surface of adjacent tunnel lining structures is also studied. On June 23,2010, explosive is 129 kg which is medium, and blasts produced obvious fluctuations about strains on the surface of lining structures and caused data mutation in the sensors after blasting, and the maximum mutation is between 35 × 10 -6- 43 ×10 -6. When the train is passing through the tunnel,the maximum mutation is between 9 × 10-6-12 × 10-6.

关 键 词：光纤BRAGG光栅 应变传感器 邻近隧道 爆破 衬砌 

分 类 号：TD353[矿业工程—矿井建设]