An experimental study on monitoring the phreatic line of an embankment dam based on temperature detection by OFDR

被引：37
|
作者：
Cheng, Lin [1 ]
Zhang, Anan [1 ]
Cao, Buliang [1 ]
Yang, Jie [1 ]
Hu, Liangcai [2 ]
Li, Yanlong [1 ]
机构：
[1] Xian Univ Technol, State Key Lab Base Ecohydraul Engn Arid Area, Xian 710048, Peoples R China
[2] China Natl Nucl Corp, Res & Design Engn Corp 4, Shijiazhuang, Hebei, Peoples R China
来源：
OPTICAL FIBER TECHNOLOGY | 2021年 / 63卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Seepage heat tracing; Optical frequency domain reflection (OFDR); Phreatic line; Experimental study;
D O I：
10.1016/j.yofte.2021.102510
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this study, temperature detection with distributed fibers was used to obtain data for a laboratory model of seepage heat in an embankment dam, and the temperature was monitored using optical frequency domain reflection (OFDR) technology with high temporal and spatial accuracies. First, the temperature field in the infiltrated region of the dam body during the seepage test showed changes similar to that measured by OFDR temperature-sensing fibers. Then the heat transfer characteristics analysis within the embankment dam during seepage was conducted using numerical simulations of heat-flow coupling. Finally, temperature distribution characteristics during steady-state seepage for different water levels were measured, and the relationship between the temperature curve and the phreatic line was obtained. The results demonstrate that accurate temperature detection by OFDR and its high spatial resolution can reflect the characteristics of the temperature field in the seepage model of an embankment dam.
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收藏
页数：11
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