高密度电法和微动探测技术在某垃圾填埋场渗漏探测中的应用  

Application of Multi-electrode Resistivity Method and Microtremor Survey Technology in Leakage Detection of a Certain Landfill Site

作　　者：刘丽丛 赵超 汪精华 陈浩辉 马晗宇[2,4] 肖志伟 王卫星 张俊彬 崔凯鹏[2,4] Liu Licong;Zhao Chao;Wang Jinghua;Chen Haohui;Ma Hanyu;Xiao Zhiwei;Wang Weixing;Zhang Junbin;Cui Kaipeng(Technical Centre of Solid Waste and Soil Ecology of Inner Mongolia,Hohhot Inner Mongolia 010000,China;Tianjin Geological Environment Monitoring Station,Tianjin 300191,China;Hohhot Ecological Environment Monitoring Center,Hohhot Inner Mongolia 010000,China;Tianjin Instituteof Geological Survey,Tianjin 300191,China)

机构地区：[1]内蒙古自治区固体废物与土壤生态环境技术中心,内蒙古呼和浩特010000 [2]天津市地质环境监测总站,天津300191 [3]呼和浩特市生态环境监控中心,内蒙古呼和浩特010000 [4]天津市地质调查研究院,天津300191

出　　处：《工程地球物理学报》2024年第6期983-995,共13页Chinese Journal of Engineering Geophysics

基　　金：天津市国土资源和房屋管理局项目(编号:津国土房任[2015]1号);天津市地质矿产勘查开发局项目(编号:津地任[2018]2号);天津市财政预算项目(编号:津地矿任[2023]1号)。

摘　　要：早期的生活垃圾填埋场由于其处理的不规范性,极易造成防渗膜底部渗漏问题,因此查明渗漏点位置及其污染羽运移范围对后期治理至关重要。本文通过对某垃圾填埋场采用高密度电阻率法和微动探测技术,利用地球物理探测三维可视化技术,结合水文地质、工程地质、钻探等资料对该垃圾填埋场的渗漏问题进行了综合研究。结果显示:工作区地层分为三层,第一层为第四系,底界标高1280 m左右,厚15 m左右;第二层为风化层,底部标高在1245~1260 m之间,变化起伏较大,厚度在20~35 m之间;第三层为基岩。垃圾填埋场最深处埋深约20 m。在垃圾填埋场底部存在两处疑似渗漏点,分别位于垃圾填埋场西北侧和东南侧,在垃圾场内渗漏液影响深度范围在15~30 m之间,渗漏液沿基岩裂隙向东南运移,集中在垃圾填埋场东南侧。在横向上,污染羽水平运移最远处距垃圾填埋场东南大坝约100 m。在纵向上,随着深度的增加,由于基岩渗透系数变小,污染羽很难渗入到地下60 m以深地层,故其影响深度范围约60 m。通过多种方法相互验证、补充,基本查明了该垃圾填埋场及周边的地层结构,圈定了垃圾填埋场的渗漏点,推测了污染羽的运移范围,取得了良好效果。Early landfill sites for household waste are prone to leakage at the bottom of the anti-seepage membrane due to their non-standard treatment.Therefore,identifying the location of the leakage point and the range of pollution plume transport is crucial for later treatment.This article comprehensively studies the leakage problem of a certain landfill site by using high-density resistivity method and micro microtremor survey technology,utilizing geophysical detection 3D visualization technology,and combining hydrogeological,engineering geological,drilling and other data.The results show that the working area contains three layers.The first layer is the Quaternary system,with a bottom boundary elevation of about 1280 m and a thickness of about 15 m;the second layer is the weathered layer,with a bottom elevation between 1245~1260 m and significant fluctuations,with a thickness between 20~35 m;the third layer is bedrock.The deepest burial depth of the landfill is about 20 meters.There are two suspected leakage points at the bottom of the landfill,located on the northwest and southeast sides of the landfill.The depth range of the leakage in the landfill is between 15~30 m,and the leakage moves southeast along the bedrock fissures,concentrated on the southeast side of the landfill.Horizontally,the farthest horizontal movement of the pollution plume is about 100 m away from the southeast dam of the landfill site.Vertically,as the depth increases,the permeability coefficient of the bedrock decreases,making it difficult for the pollution plume to penetrate into the underground strata deeper than 60 meters.Therefore,its impact depth range is about 60 meters.Through various methods of mutual verification and supplementation,the geological structure of the landfill site and its surrounding areas is basically identified,the leakage points of the landfill site are del ineated,and the migration range of the pollution plume is speculated,achieving good results.

关 键 词：高密度电阻率法 微动探测技术 垃圾填埋场 三维可视化 污染羽 渗漏 

分 类 号：P631[天文地球—地质矿产勘探]