摘要
渗漏是严重影响堤坝安全的主要形式,确定渗漏通道的位置是进行堤坝渗漏整治的前提和基础。温度场探测堤坝渗漏的研究是其中一种较便捷的方法,但是在理论上还需要进一步完善。在库水和地下水存在着温度差异的基础上,考虑堤坝发生集中渗漏后,渗漏通道中的地下水与周围土体进行热量交换,造成渗流通道附近地层温度发生改变,建立起温度场对渗漏通道的反演模型。在前人研究的基础上,考虑地温梯度的影响,可以建立有集中渗漏通道影响下的二维热传导方程,进而以现场测井的温度数据作为边界条件,对泛定方程进行求解,最终得到渗漏通道的位置。计算结果和实测结果的对比表明,通过温度场反推渗漏通道参数的方法是可行的。
Leakage is the main form which influences dyke safety severely, so to determine the position of the leakage passage is the precondition and base of dyke repair. Study on temperature tracing dam leakage is one of the convenient methods, but it needs further consummate on theory. Based on the temperature differences between reservoir water and underground water, after considering the concentrated leakage of the dam, heat exchanges be- tween the underground water in leakage passage and the soil around, and this leads temperature altering in the stratum near leakage passage, and then model for temperature field inverse analysis of leakage passage can be es- tablished. Based on the previous work, considering the influence of ground temperature grads, planar heat con- duction equation influenced by concentrated leakage passage can be established, boundary condition is based on temperature date of locale logging, solve the differential equation, the position of leakage passage can be derived finally. The contrast between the calculated results and surveyed indicates that determining the parameters of lea- king passage by using inverse analysis through temperature field is viable.
出处
《东华理工学院学报》
2007年第4期354-357,共4页
Journal of East China Institute of Technology
基金
国家自然科学基金"裂隙岩体渗流能量传递热源法及示踪理论研究"(50179009)
关键词
渗漏通道
热源法
地温梯度
测井
leakage passage
temperature method
ground temperature grads
logging
作者简介
陈亮（1976-），讲师，主要从事饱和与非饱和渗流研究。
