Purpose

Seepage of the dam is an important safety problem, which may cause internal erosion of the structure. In the field of seepage monitoring in civil engineering, the distributed optical fiber sensing technology based on the temperature tracing method has been paid more attention due to its unique advantages of high sensitivity, good stability and high resolution. The purpose of this paper is to make a review of the existing related research, so as to facilitate the later scholars to understand and further study more systematically.

Design/methodology/approach

In this paper, three kinds of commonly used distributed fiber temperature measurement technologies are introduced. Based on the working principle, monitoring system, theoretical analysis, experimental research and engineering application of the fiber seepage monitoring technology, the present situation of dam seepage monitoring based on distributed fiber is reviewed in detail and their advantages and disadvantages are compared.

Findings

The thermal monitoring technology of seepage measurement depends on the accuracy of optical fiber temperature measurement (including the accuracy of the system and the rationality of the discrimination method), the correct installation of optical fiber and the quantitative analysis of temperature data. The accuracy of the current monitoring system can basically meet the existing measurement requirements, but the correct installation of optical fiber and the calibration of temperature data need to be further studied for different discrimination methods, and this field has great research value.

Originality/value

At present, there are many applications and research studies of optical fiber sensing in the field of structural health monitoring, and there are also reviews of related aspects. However, there is little or no review only in the field of seepage monitoring. This paper summarizes the research and application of optical fiber sensing in the field of seepage monitoring. The possibility of the gradient method to find its new prospect with the development of monitoring systems and the improvement of temperature resolution is discussed. The idea of extending the seepage monitoring method based on distributed optical fiber thermal monitoring technology to other monitoring fields is also given in the paper.

中文翻译：

---

基于分布式光纤热监测技术的大坝渗漏研究综述

目的

大坝渗水是一个重要的安全问题，可能会引起结构的内部侵蚀。在土木工程渗流监测领域，基于温度追踪法的分布式光纤传感技术以其灵敏度高、稳定性好、分辨率高的独特优势受到越来越多的关注。本文的目的是对现有的相关研究做一个回顾，以利于后人更系统地理解和进一步研究。

设计/方法/方法

本文介绍了三种常用的分布式光纤测温技术。从光纤渗流监测技术的工作原理、监测系统、理论分析、实验研究和工程应用等方面，详细回顾了基于分布式光纤的大坝渗流监测现状，比较了它们的优缺点。

调查结果

渗流测量热监测技术取决于光纤测温的准确性（包括系统的准确性和判别方法的合理性）、光纤的正确安装和温度数据的定量分析。目前监测系统的精度基本可以满足现有的测量要求，但是对于不同的判别方法，光纤的正确安装和温度数据的标定还需要进一步研究，该领域具有很大的研究价值。

原创性/价值

目前，光纤传感在结构健康监测领域有很多应用和研究，也有相关方面的综述。然而，仅在渗流监测领域很少或没有评论。本文综述了光纤传感在渗流监测领域的研究与应用。讨论了随着监测系统的发展和温度分辨率的提高，梯度法有可能找到新的前景。论文还提出了将基于分布式光纤热监测技术的渗流监测方法扩展到其他监测领域的思路。