摘要
利用电流场的电势微分控制方程与渗流场的流速势微分控制方程的相似性原理,流场法通过检测电流场的分布来确定渗流场,并能快速查明堤坝的管涌渗漏入口。为了更精确地描述土坝管涌的渗流分布及渗流方向,可以测试迎水面和背水面的水平方向与垂直方向的电位差,模拟渗流的矢量分布。从电流密度、电位微分及电位微分绝对值等方面,阐述了矢量流场法模拟渗流矢量分布的基本原理,并以某土石坝渗漏探测为例开展了验证工作。结果显示,矢量流场法可以有效揭示土石坝的渗流等级及渗流方向,结合流场法和矢量流场法探测成果,可为查明土石坝渗漏入口、渗流等级及渗流方向提供新的思路。
Based on the similarity between the electric potential differential control equations of the current field and velocity potential differential control equations of the seepage field,the flow field method(FFM)can not only determine the seepage by measuring the distribution of current field,but also can efficiently figure out the leakage location of the dam.For further discovering the vector distribution and direction of seepage more accurately,the horizontal and vertical potential difference between the upstream and the downstream can be measured to simulate the vector distribution of seepage.In this paper,we illustrate the principle of vector flow field method(VFFM)to simulate the vector distribution of seepage from the aspects of current density,potential differential and absolute value of potential differential.The verification experiment is carried out in a case study of earth-rock dam seepage detection.The results demonstrate that the VFFM can effectively discover the seepage grade and leakage direction.Combined with the results of FFM and VFFM,the proposed method can provide a new solution for detecting the leakage location,seepage grade and leakage direction of earth-rock dam.
作者
戴前伟
崔永生
韩行进
雷轶
李杰鹏
朱泽龙
DAI Qianwei;CUI Yongsheng;HAN Xingjin;LEI Yi;LI Jiepeng;ZHU Zelong(School of Geosciences and Info-Physics,Central South University,Changsha 410083,China;Key Laboratory of Metallogenic Prediction of Nonferrous Metal and Geological Environment Monitoring,Ministry of Education,Changsha 410083,China;Wuling Power Co.Ltd.,Changsha 410004,China)
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2021年第1期270-276,共7页
Coal Geology & Exploration
基金
国家自然科学基金项目(41874148)
国家重点研发计划课题(2018YFC0603903)。
关键词
流场法
矢量流场法
土石坝
矢量分布
渗流方向
flow field method
vector flow field method
earth-rock dam
vector distribution
leakage direction
