基于温度场反分析的堤坝多个集中渗漏通道探测方法

在作者已提出的初始温度均匀堤坝中形成单个渗漏通道的温度场解析解的基础上，运用叠加原理建立了多个渗漏通道的温度场解析式，随后通过六参数Bursa-Wolf模型进行坐标变换，运用反分析建立出基于温度场探测多个集中渗漏通道的模型。将该模型用于分析陡河水库的渗漏问题。分析中将模型简化，建立圆柱状多个渗漏通道温度探测平面模型，先进行单个集中渗漏通道数据拟合，再计算各测点相对于该拟合曲线的残差，对残差作三次样条插值曲线，从而直观地判断集中渗漏通道的数量。计算结果表明，该工程存在3个明显的温度波谷。最后用优化方法计算出左坝肩的3个渗漏通道的确切位置，与实地调查结果一致，较同位素等综合方法定性分析更为精确。

Model for detecting multiple concentrated seepage passages in earth dams based on reverse analysis of temperature field

On the basis of the analytic solution of temperature field analysis for detecting a single seepage passage suggested by the authors, a new analytic solution for multiple seepage passages is established by means of superposition principle. The Bursa Wolf model is used to implement the coordination transformation and the model applying the reverse analysis for detecting multiple concentrated seepage pessages is established. The model is applied to analyze the seepage problem occurred to the earth dam of Douhe Reservoir. The model is simplified as a plane model for temperature detection of multiple cylindrical seepage passages. First, the fitting of the measurement data of single concentrated seepage is carried out, and then the residual errors of every measurement data point relative to the fitting curve can be calculated and used to establish the cubic spline interpolation curve of the errors. The amount of concentrated seepage passages can be directly determined consequently. The analysis result shows that three obvious temperature wave troughs happen to the dam. The three seepage passages located at the left abutment of the dam are accurately determined by optimized calculation method accordingly. This result is in good agreement with the situation of in situ investigation.