渗漏入口大小及形状对拟流场法渗漏探测的影响研究  

Influence of leakage inlet size and shape on leak detection by the pseudo-flow field method

作　　者：许增光[1] 阳勇波 曹成 付涵 张泽源 XU Zengguang;YANG Yongbo;CAO Cheng;FU Han;ZHANG Zeyuan(State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]西安理工大学西北旱区生态水利国家重点实验室,陕西西安710048

出　　处：《水资源与水工程学报》2024年第3期129-135,共7页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金项目(52179143);陕西省科技创新团队项目(2022TD-01);陕西省重点研发计划项目(2022ZDLNY02-04)。

摘　　要：为深入研究渗漏入口大小及形状对拟流场法渗漏探测的影响规律,通过构建堤坝渗漏数值模型,模拟了拟流场法在实际工程中的探测情况。研究了水库拟流场的基本分布特征,揭示了不同大小及形状的渗漏入口附近的电流密度分布规律,并提出了不同大小及形状的渗漏入口在平行于坝轴线和平行于坝面垂直于坝轴线两个方向上拟流场影响范围及电流密度峰值的经验公式。结果表明:线状渗漏入口的电流密度比相同面积圆形渗漏入口的电流密度小,且线状渗漏入口短边影响范围比相同长度的圆形渗漏入口大,长边影响范围比相同长度的圆形渗漏入口小。研究揭示了渗漏入口大小及形状对测线上电流密度分布的影响规律,可为实际工程探测中利用测线上的电流密度分布情况判断渗漏入口大小与形状提供依据。To delve into the influence patterns of leakage inlet size and shape on the leak detection by the pseudo-flow field method,we employed numerical modeling of dam leakage to simulate real-world detection scenarios.We investigated the fundamental distribution characteristics of the pseudo-flow field in reservoirs and revealed the distribution patterns of current density near leakage inlets of different sizes and shapes.Empirical formulas were proposed to determine the range of influence and corresponding peak current density of leakage inlets of different sizes under two scenarios,namely,inlet parallel to the dam axis,inlet parallel to the dam surface and perpendicular to the dam axis.It is found that the shape of the inlet can be controlled by adjusting the length-to-width ratio,the current density of the linear leakage inlet is lower than that of the circular one of the same area.Additionally,the influence range of the linear leakage inlet along the short edge is larger than that of the circular one of the same length,whereas that along the long edge is smaller.The study revealed the influence of the size and shape of leakage inlets on the distribution of current density along monitoring lines,providing a basis for the determination of the size and shape of leakage inlets according to the distribution of current density along monitoring lines in practical detection.

关 键 词：堤坝渗漏 拟流场法 渗漏入口 电流密度 测线布置 

分 类 号：TV871[水利工程—水利水电工程]