摘要
南水北调工程输水隧洞盾构下穿既有地铁隧道,将两组光纤布拉格光栅传感器分别沿纵向布置在既有隧道结构的顶部和底部,采集穿越过程中的相应数据。对此进行定量分析评估后,发现既有隧道纵向应变变化值分布不均匀,呈波浪形变化,且"端部效应"明显,隧道结构的安全性在相应的可控范围之内。
The engineering case study is the water conveyance ttmnel shield of South-to-north Water Diversion Project under the existing subway tunnel. The two sets of optical fiber Bragg grating sensor are arranged respectively along the longitudinal in both the top and bottom of the tunnel structure. By quantitative analysis of evaluation of the corresponding data in the process of acquisition, we found that both the uneven distribution of tunnel longitudinal strain change value, undulate change, and ＂end effect＂ is apparent and the safety of the tunnel structure is under control.
出处
《建筑技术》
北大核心
2016年第5期453-456,共4页
Architecture Technology
基金
国家科技支撑计划(2012BAK24B03)
国家自然科学基金(51208105)
关键词
光纤布拉格光栅传感器
沉降变形
监测评估
地铁隧道
fiber bragg grating sensor
deformation and sedimentation
inspect and assess
subway tunnel
