混凝土重力坝裂缝观测的光纤传感网络

Optical fiber sensor network for crack monitoring in concrete gravity dams

首次提出了混凝土裂缝监测的基于光时域反射技术的全分布式光纤传感网络， 混凝土模型试验表明它以高分辨率（０．０１ｍ ｍ） 感知缝宽， 且能定位， 能实施大范围、连续、立体检测， 对混凝土坝裂缝监测特别有用． 对三峡重力坝建议了典型布置方案．

A full distributed optical fiber sensor network,based on optical time domain reflectometry,for concrete crack monitoring is presented for the first time.Model tests show that it not only can detect crack widths with high resolution but also localize the cracks.Thus,the continuous and special observation for the dam body in a large range can be carried out.This is particularly useful for crack monitoring of concrete dams.The scheme of application to the Three Gorges Project is proposed.