摘要
结合引水隧洞施工和运行长期监测的需要和当前岩土监测所用传统仪器的不足,分析了光纤布拉格光栅(FBG)传感监测原理和实现方法,提出采用FBG锚杆应力计对隧洞围岩进行安全监测。通过某引水隧洞工程对已安装的FBG锚杆应力计进行长期观测,效果良好,总结了隧洞施工期间锚杆应力变化规律,并突出了FBG锚杆应力计稳定性好、耐腐蚀和在隧洞结构工程中能进行长期有效监测等优点。
Combined with the need of long-term monitoring of tunnel construction and operation,and focused on the shortage of traditional sensor used in geotechnical monitoring,based on the analysis of fiber bragg grating（ FBG） sensing monitoring principle and implementation method,the safety monitoring of the wall rock is carried out by using the FBG bolt stress meter. Through a water diversion tunnel project,the long-term observation of the installed FBG bolt stress meter,the effect is well,the law of bolt stress during tunnel construction is summarized,and the advantages of the FBG bolt stress meter is highlighted,such as good stability,corrosion resistance,and can be used in the tunnel structure project for long-term effective monitoring,etc.
出处
《工程勘察》
2016年第12期48-51,共4页
Geotechnical Investigation & Surveying
基金
中央级公益性科研院所基本科研业务费专项资金(Y915010)
关键词
隧洞
光纤光栅
锚杆
应力
监测
tunnel
fiber bragg grating
bolt
stress
monitoring
