基于弱光栅技术的大断面输水隧洞深层围岩变形监测

Deformation Monitoring of Deep Surrounding Rock of Large-section Water Conveyance Tunnel Based on Weak Grating Technology

隧洞深层围岩变形的准确监测能够提高隧洞的施工效率和安全性。利用弱光栅技术对平阳县某输水隧洞深层围岩变形进行监测。监测结果显示:隧洞围岩应变变化较小,围岩稳定性总体上较好,同时弱光纤光栅感测光缆监测结果与传统监测结果基本一致,符合事实情况。监测方案和监测结果可为类似工程提供参考。

Accurate monitoring of the deformation of the deep surrounding rock of the tunnel can improve the efficiency and safety during tunnel construction.Weak grating technology was used to monitor the deformation of the deep surrounding rock of a water conveyance tunnel in Pingyang.The monitoring results show that the strain change of tunnel surrounding rock is small,and the stability of surrounding rock is generally good.The monitoring results of the weak fiber grating sensing cable is basically consistent with the traditional monitoring results,which are in line with the facts.The monitoring plan and monitoring results can provide reference for similar projects.