摘要
为深入研究拟流场基本特征和流场法探测原理,完善流场法探测堤坝渗漏入口技术,从建立拟流场数学模型入手,通过对有渗漏典型堤坝工程拟流场进行有限元法数值模拟计算,得到了拟流场电位、电场强度及电流密度等主要物理量分布的基本特征。拟流场中电极附近电位、电流密度及电场强度呈尖峰状密集分布,其他区域数据幅值很小,且均匀分布;渗漏通道入口将引起堤坝前局部水域拟流场电流密度和电场强度数值异常突变。模拟结果表明流场法可以探测出渗漏通道入口,探测设备需要具有较小分度值和较强的抗干扰能力。
In order to improve the theory and technology of the flowing field method that is used to detect the entrance of dam leakage,this work started from the numerical modelling of a quasi-flowing field. The physical quantities of the quasi-flowing field for a typical dam are calculated by the finite element method and main distributing features of variables for the quasi-flowing field have been obtained. Result shows that intensities of the electric field,electric potential and current near the source had a peak distribution,and it decreased dramatically to a stable level at the far field. Due to the existence of leakage,an abnormal distribution of the current intensity and electric filed appeared near the entrance of leakage in the water area. This abnormal can help detect the leakage entrance and the detecting device requires a smaller division value and high anti-interference ability.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2018年第1期52-58,共7页
Journal of Hohai University(Natural Sciences)
基金
黑龙江省应用技术研究与开发计划引导项目(GZ16B005)
关键词
拟流场
流场法
电位
电场强度
电流密度
堤坝渗漏
渗漏入口
有限元法
quasi-flowing field
quasi-flowing field method
electric potential
electric field intensity
current
leakage of dams
dam leakage entrance
finite element method
