基于非线性最小二乘法的土石坝渗漏探测研究  

Study on leakage detection of earth-rock dam based on nonlinear least square method

作　　者：辛焱雯 甘建军[1] 司智航 刘凯军 田涛 刘清 黄红儒 XIN Yanwen;GAN Jianjun;SI Zhihang;LIU Kaijun;TIAN Tao;LIU Qing;HUANG Hongru(School of Hydraulic Engineering,Nanchang Institute of Technology,Nanchang 330099,China;China Railway Water Conservancy&Hydropower Planning and Design Group Co.Ltd.,Nanchang 330029,China)

机构地区：[1]南昌工程学院水利工程学院,江西南昌330099 [2]中铁水利水电规划设计集团有限公司,江西南昌330029

出　　处：《南昌工程学院学报》2025年第1期8-13,共6页Journal of Nanchang Institute of Technology

基　　金：国家自然科学基金项目(42162025);中国中铁股份有限公司课题(2021-重大-08);中铁水利水电规划设计集团有限公司项目(地勘-2020ww-0019);2024年度江西省自然资源厅科技创新项目(ZRKJ20242413)。

摘　　要：针对砂岩区水库大坝渗漏探测的不确定性等问题,提出了一种基于准牛顿最优化非线性最小二乘法的大坝渗漏探测方法。首先运用高密度电法(ERT)对砂岩区水库大坝进行渗漏探测,然后引入准牛顿最优化非线性最小二乘法(QNON)进行ERT成果解译,最后使用钻探方法(BH)和压注水试验(WJT)进行工程地质问题对比分析。结果表明,基于准牛顿最优化非线性最小二乘法的ERT,对土石坝渗漏检测比较敏感,在该土石坝发现了5处低阻异常区域;高密度电法探测数据经过QNON优化后,具有更高的分辨率和更精细的反演结果,可以更加有效地圈定土石坝的渗漏位置。通过BH和WJT进行验证,确定了高密度电法的解释结果,查明了水库大坝的渗漏位置及特征。该方法很好地探测出了渗漏点,指明了水库大坝防渗灌浆的空间分布位置,可以为水库大坝的防渗工程设计提供参考。In response to the uncertainty of reservoir dam leakage detection in sandstone area,a dam leakage detection method based on quasi-Newton optimization nonlinear least square method is proposed.Firstly,the high-density electrical method(ERT)is used to detect the leakage of the reservoir dam in the sandstone area,and the quasi-Newton optimization nonlinear least square method(QNON)is introduced to interpret the ERT results.Then,the drilling method(BH)and water injection test(WJT)are used to compare and analyze the engineering geology.The results show that the ERT based on the quasi-Newton nonlinear optimization least square method is sensitive to the leakage detection of the earth-rock dam,and five low-resistance abnormal areas are found in the earth-rock dam.The high-density electrical detection after QNON optimization has higher resolution and finer inversion results,which can more effectively delineate the leakage location of earth-rock dams.Through the verification of BH and WJT,the interpretation results of high-density electrical method are determined,and the leakage location and characteristics of reservoir dam are accurately determined.This method detects the leakage point well and points out the spatial distribution position of the anti-seepage curtain grouting of the reservoir dam,which can provide reference value for the anti-seepage project of the reservoir dam.

关 键 词：高密度电法 准牛顿最优化 最小二乘法 土石坝 渗漏探测 

分 类 号：P631.3[天文地球—地质矿产勘探]