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.

在这项研究中，使用分布式纤维的温度检测来获得堤坝渗流热实验室模型的数据，并使用具有高时空精度的光频域反射（OFDR）技术监控温度。首先，在渗透测试过程中，坝体渗透区域的温度场显示出与OFDR温度感应纤维测得的变化类似的变化。然后利用热流耦合的数值模拟进行了堤坝内渗流过程中的传热特性分析。最后，测量了不同水位下稳态渗流过程中的温度分布特征，得到了温度曲线与潜水线之间的关系。