光纤光栅渗漏监测技术在猴子岩混凝土面板堆石坝的应用

Application of Fiber Bragg Grating Seepage Monitoring Technology in Houziyan CFRD

为解决面板堆石坝传统渗漏监测技术的不足,猴子岩水电站混凝土面板堆石坝在国内首次采用2套光纤光栅测温监测系统(光纤光栅测温系统、分布式光纤测温系统)分别监测大坝面板周边缝和板间缝渗漏情况。系统介绍了猴子岩混凝土面板堆石坝光纤光栅渗流监测系统结构和布置,并对监测成果进行了分析。监测数据分析表明,面板周边缝和板间缝测点温升未发现异常点,据此可以判定面板周边缝和板间缝不存在疑似渗漏点。

In order to make up the deficiency of traditional seepage monitoring technology of concrete faced rockfill dam （CFRD）, two sets of fiber grating temperature measurement monitoring systems （fiber bragg grating temperature measurement system and distributed optical fiber temperature measurement system） are firstly used to monitor the seepage of face slab peripheral joints and inter-plate joints of Houziyan CFRD separately in China. The structures and arrangements of two sets of fiber grating temperature measurement monitoring systems in Houziyan CFRD are introduced,and the monitoring data are analyzed. The monitoring data analysis shows that no abnormal temperature rise point is found in peripheral joints and inter-plate joints. So it can be determined that there is no suspected seepage point in peripheral joints and inter-plate joints.