三维重构反演的土石坝渗漏通道精确识别技术  

Accurate identification technology for leakage channels in earth-rock dams through three-dimensional reconstruction and inversion

作　　者：孙佳易 邓昌[1] 汤雷[1] 王海军[1] 温嘉琦 SUN Jiayi;DENG Chang;TANG Lei;WANG Haijun;WEN Jiaqi(Nanjing Hydraulic Research Institute,Nanjing 210029,China)

机构地区：[1]南京水利科学研究院,江苏南京210029

出　　处：《水利水运工程学报》2024年第4期71-79,共9页Hydro-Science and Engineering

基　　金：国家重点研发计划项目(2021YFC3090103)。

摘　　要：高密度电法是探测土石坝渗漏的主要方法,但对渗漏范围边缘的识别较为模糊,无法分辨低阻识别成因。为了弥补该局限性,提出一种三维重构反演(3D-reconstructioninversion)的渗漏通道精确识别方法:首先布设多条正交于可能存在渗漏通道的2D平行测线并进行高密度电法反演,将反演图简化处理后置于三维模型剖面中,然后利用多条测线探测的低阻区高程推算出浸润线,综合分析确定渗漏位置。结果表明:该方法可以精确检测渗漏位置,确定导致反演中低阻识别的原因,可更加直观地观测渗漏通道走向,有效减少因正常渗流导致的低阻识别误差。High-density electrical method is the main technology for detecting leakage in earth-rock dams,but it often lacks precision in identifying the edges of the leakage area and discerning the causes of low resistivity identification.To address this limitation,a precise identification method for leakage channels through three-dimensional reconstruction and inversion is proposed:Multiple 2D parallel survey lines are laid out orthogonal to potential leakage channels,and high-density electrical method inversions are performed.The simplified inversion results are then placed within a threedimensional model cross-section.Subsequently,the infiltration lines are deduced from the elevation data obtained from multiple survey lines,and a comprehensive analysis is conducted to determine the leakage position.Results demonstrate that this method accurately detects leakage positions,identifies the reasons for low resistivity identification during inversion,provides a more intuitive observation of the direction of leakage channels,and effectively reduces low resistivity identification errors caused by normal seepage.

关 键 词：土石坝 渗漏通道识别 三维重构反演 高密度电法 

分 类 号：TV554[水利工程—水利水电工程]