软土地区在产企业污染监测及预警方法研究:基于时移高密度电法的应用  

Research on monitoring and early warning methods for industrial pollution in soft soil areas:application of time-lapse high-density electrical resistivity tomography

作　　者：冯世进[1,2] 陈佳卓 高梦雯 张晓磊[1] 吴强 肖钰 FENG Shi-jin;CHEN Jia-zhuo;GAO Meng-wen;ZHANG Xiao-lei;WU Qiang;XIAO Yu(Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China;Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education,Tongji University,Shanghai 200092,China;Baowu Group Environmental Resources Technology Limited Company,Shanghai 201999,China;Shanghai Baofa Environmental Science Technology Limited Company,Shanghai 201999,China)

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]同济大学岩土与地下工程教育部重点实验室,上海200092 [3]宝武集团环境资源科技有限公司,上海201999 [4]宝发环科技术有限公司,上海201999

出　　处：《岩土力学》2025年第4期1323-1334,共12页Rock and Soil Mechanics

基　　金：国家重点研发计划(No.2020YFC1808105);国家自然科学基金(No.42372335);中央高校基础研究基金。

摘　　要：电阻率层析成像法(electrical resistivity tomography,ERT)已逐步应用于环境岩土领域,但针对软土区域有机污染识别的适用性仍缺少系统论证和应用实例。通过对上海某化工企业进行高密度电法测试,并采用钻孔取样验证和污染特征相关性分析等方法,有效地识别了该企业的污染特征。结果显示:场地污染区域均呈现局部高阻(70Ω·m以上)和局部包裹状的显著特征,通过钻孔开挖验证了高密度电法在软土区域判别非水相有机污染的有效性;对纵向数据进行分析计算,发现污染区域点位电阻率随深度呈现先降后增再降的趋势并具有较低的相关性;根据污染划分结果建立长期监测系统,提出了一种基于图像灰度相关性理论的连续ERT监测信息定量评价方法,并通过入渗试验全过程反演计算图像相关系数,可实现非水相有机污染物的快速预警,为企业的污染泄漏快速判定、监测预警提供理论和技术参考。Electrical resistivity tomography(ERT)has been gradually applied in the environmental geotechnical field,but its applicability for identifying organic pollution in soft soil areas lacks systematic validation and application examples.Through high-density electrical resistivity testing conducted at a chemical industry site in Shanghai,coupled with verification through borehole sampling and analysis of pollution characteristics,the pollution features of the site were effectively identified.Results indicate that contaminated areas exhibit localized high resistivity(above 70Ω·m)and significant zones of encapsulation.Validation through borehole excavation confirmed the efficacy of high-density electrical resistivity tomography in discerning non-aqueous phase organic pollutants in soft soil areas.Analysis of longitudinal data revealed that point resistivity in polluted areas exhibits a trend of initial decrease,followed by an increase and subsequent decrease with depth.Based on pollution delineation results,a long-term monitoring system was established,proposing a quantitative evaluation method for continuous ERT monitoring information based on image grayscale correlation theory.By calculating image correlation coefficients throughout infiltration tests,rapid early warning of non-aqueous phase organic pollutants can be achieved,providing theoretical and technical references for rapid determination,monitoring,and early warning of pollution leaks in enterprises.

关 键 词：高密度电阻率 有机污染物 反演图像 相关性分析 监测预警 

分 类 号：TU447[建筑科学—岩土工程]