基于被动红外热成像的土石堤坝渗漏探测试验研究  

Experimental study on leakage detection of earth rockfill dams using passive infrared thermography

作　　者：周仁练 苏怀智 刘明凯[1,2] 徐朗 华倩宇 ZHOU Renlian;SU Huaizhi;LIU Mingkai;XU Lang;HUA Qianyu(State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University,Nanjing 210098,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [2]河海大学水利水电学院,江苏南京210098

出　　处：《水利学报》2022年第1期54-67,共14页Journal of Hydraulic Engineering

基　　金：国家重点研发计划课题(2019YFC1510801,2018YFC0407101);国家自然科学基金项目(51979093)。

摘　　要：目前堤坝汛期渗漏险情的发现仍以人工巡视为主要手段,严重制约了应急处置水平。为探究自然环境条件下被动红外热成像探测土石堤坝渗漏的可行性及其热图像特征和规律,搭建了能充分模拟土石堤坝汛期真实服役条件的试验平台。试验表明,午后和夜间是利用红外热成像巡查土石堤坝渗漏的较佳时段,午后渗漏出口通常表现为低温异常,而夜间则表现为高温异常;集中渗漏影响区在热图像上具有拖尾轮廓及大致以渗漏出口为中心的温度梯度变化纹理特征;无论下游坝坡有无草皮覆盖,自然条件下被动红外热成像探测土石堤坝渗漏均是可行的。At present,manual patrol is still the main means to inspect leakage dangers of the embankment in flood season,which seriously restricts the level of emergency disposal. To explore the feasibility of passive infrared thermography sensing earth rock dam leakage under natural environmental conditions,an earth dam leakage model test platform which can fully simulate the real service conditions of earth rock dam and river embankment in flood season is built. The test results show that afternoon and night are the better time to detect the leakage of earth rockfill dams by infrared thermography. The leakage outlet usually shows low temperature anomaly in the afternoon and high temperature anomaly during night. The concentrated leakage affected zone has obvious trailing contour characteristics and temperature gradient variation characteristics centered on the leakage outlet on the thermal image. Whether the downstream dam slope is covered with turf or not,it is feasible to detect the leakage of earth rockfill dams by passive infrared thermography under natural environmental conditions.

关 键 词：土石坝 堤防 渗漏 红外热成像 热图像 

分 类 号：TV641[水利工程—水利水电工程]