基于电磁感应法的固废填埋区探测研究

Detection of solid waste deposits based on electromagnetic induction

以疑似存在固废填埋区的农业用地为例,采用电磁感应法快速实现填埋区定位,结合高密度电阻率法对数据进行校准,并利用钻探结果进行验证。本研究以小于3.76Ω·m的电阻率值作为填埋区的判定准则,对于疑似塌陷填埋位置,电磁感应法的探测结果与其实际情况吻合较好,且发现了一处地表尚在种植作物的填埋区,疑似填埋区在整个地块的空间覆盖率为30.55%。根据探测结果选择12处钻孔点位验证了地块填埋有生活垃圾、污泥等。本次探测耗时12 h,获取数据量105 600个,数据有效率99.78%。通过电磁感应方法,实现了对填埋区的污染探测及定位,对于指导后期地块填埋物的污染修复具有现实意义。

In this study,electromagnetic induction was utilized to identify a farmland and localize a probable solid waste deposit.The results were calibrated by electrical resistivity tomography and verified by borehole sampling.In this study,the resistivity value less than 3.76Ω·m was used as the criterion for determining the solid waste deposit.The results show that for the known subsidence area,the results from the electromagnetic induction method are in good agreement with the actual condition,and another waste deposit with crops still growing on the surface is discovered as well.The spatial coverage of the suspected solid waste deposit in the whole site accounts for 30.55%.According to the detection results,12 boreholes were selected to verify the landfill has municipal waste,sludge disposal and so on.In this study,it took only 12 hours with 105600 data points obtained,and 99.78%of them were further analyzed.Through the electromagnetic induction method,the contamination detection and location of the potential solid waste deposit are realized,which is of practical significance for guiding landfill excavation and further remediation.