应用FBGS的海底隧道结构监测系统设计

FBG Sensors to Monitor the Structural Desigh of the Undersea Tunnel

鉴于海底隧道工程环境的不确定性,为确保海底隧道安全运营,必须对海底隧道进行长期的结构监测。由于光纤光栅传感器比传统电测类传感器的测量精度高,传输距离长、长期稳定性好。因此在厦门翔安海底隧道结构监测设计中运用光纤光栅传感器对隧道结构进行实时在线监测。对隧道初期支护工字钢应变、锚杆应变、二次衬砌混凝土应变进行监测。通过组网连接把各个监测截面的信号引入到主控室进行实时在线监测。

According to the uncertainty of the engineering environment in undersea tunneling, it＇s necessary to carry out a long time structure monitor so as to make sure the running safety of the undersea tunnel. Since the fiber-optical grating sensor contains more height measure accuracy, long transfer distance, better long stability than that of the tradition electrical sensor, it is good to apply the fiber-optical grating sensor to monitor the tunnel structure real time in the design of the structure monitor in the undersea tunnel of Xiang＇ an in Xiamen. The strain of the I-steel, rockbolt and the II-concrete lining are monitored. Real time monitor on line in the master-control room is in progress by the fact that the group net links up with the signal from every monitoring cross section.