利用孔中温度场分布确定堤坝渗透流速的热源法模型研究

Model research of heat source method by using water temperature distribution in borehole to determine seepage velocity of dyke

地下水温度场是研究地下水运动的一种良好的天然示踪剂。库水或河水发生集中的强渗漏时,由于库水、河水与地下水之间的温度差异,渗漏水必将对周围地层温度产生影响。本文对这种由于热源运动而产生的影响进行研究,将渗漏通道看作是一个线热源,利用虚拟热源法推导出了地层中过余温度公式,提出了一个利用孔中温度分布研究堤坝渗漏的简化模型。利用该模型可以计算出堤坝渗透流速,为工程加固提供科学依据。

The water temperature is a well natural tracer for studying the behavior of groundwater. When the water of a reservoir or river leaks through concentrate leakage passage, the temperature of stratum will be influenced because of the difference of temperature. This article studies this influence that results from heat source movement. Regarding the leakage passage as a line heat source, the formula of excessive temperature is deduced with virtual heat source method, and a simple model of using water temperature distribution in borehole to study leakage of dyke is proposed. With this model the leakage velocity can be determined, and the scientific basis for next strengthening measures can be provided.