温度场反分析法确定大坝渗漏通道位置

摘要

When an embankment has a concentrated leakage passage,the heat exchange with groundwater and rock media will occur around leakage passage,and this leads temperature altering in the stratum near leakage passage. Temperature tracer method is a universal method using tempera-ture field to research the dam leakage,but it’s almost the qualitative analysis at present. Only by determining the exact location and size of leakage passage,can the leakage problem be effectively controlled. In this paper,the Matlab optimization program was written based on the model for de-tecting multiple concentrated leakage passages. By optimizing and fitting leakage passage lines of the specific engineering,we calculated the leakage position quantitatively. Compared with analysis results of the measured temperature of drill holes,the results were the same. As a result,it is feasi-ble to use the method to detect the exact location of leakage passage.%岩土体发生渗漏时，渗漏通道内的流体与岩土体会发生热量交换，造成渗流通道附近地层温度发生改变。温度示踪方法是运用温度场研究堤坝渗漏的普遍方法，但目前大多进行的是定性分析，只有确定渗漏通道的确切位置及大小，才可有效整治渗漏问题。基于多个集中渗漏通道温度场探漏模型，编写优化程序，针对具体工程进行渗漏通道的测线优化反演，定量地计算出渗漏的位置，并与钻孔实测温度的分析结果进行对比，两者结论一致，证明了该方法的可行性。