摘要
为解决含多氯联苯电容器地下掩埋封存点难以准确定位的困难,结合某工程实例,运用质子磁力仪高精度磁法和温纳装置高密度电法的现代综合物探方法,设定勘测范围60 m×50 m,布设4条电法剖面线,快速准确地确定了封存点的位置、边界和深度。共发现2处地下封存点,均使用了水泥砂浆浇筑。其中较大的1号掩埋坑由于人为扰动,已无电容器存在,且水泥块破碎;东侧较小的2号掩埋坑保存完整,电容器埋藏深度在1.5 m以下。同时,探清了勘测区域10m深度范围内的地层结构。
The present paper is aimed to introduce our experimental application of geophysical exploration method in searching for PCBs-containing capacitor storage sites. As is known, previous survey indicate the information of PCBs-containing storage sites had been vague and therefore inefficient in collecting relevant resources for position finding. In order to locate the deposit sites accurately and promptly, it has to apply to the other modem integrated geophysical methods to locate the sites. To solve the problem, we have introduced an engi- neering sample in this paper, in which the method was used to detect the wasted PCBs-containing capacitors buried 30 years before at a depth of 1.5 m underground with suecessful detection by using high preeision proton magnetometer and high density Wenner electrical method. The scope is in-laid with four electrical section lines for detection（60 m × 50 m）. As a result, two underground storage sites with pouring cement mortar were discovered. Nevertheless, in the larger burial pits, no capacitors were found existing and the concrete blocks were found broken as a result of damage, while the smaller one on the eastem side of the disturbed one was still well-preserved. In addition, regional geological structure can also be identified clearly. In the upper strata, two layers of silty clays were found with a surface layer only 0.5 - 1 m containing ealeareous nodules and 8 - 10 m below the bedrock. Thus, it can be confirmed that geophysical methods can still be satisfactorily used in dedeeting the polluted sites of the location, whieh helps to provide the basis for confirming the scope and restoration of contaminated sites.
出处
《安全与环境学报》
CAS
CSCD
北大核心
2010年第2期69-71,共3页
Journal of Safety and Environment
关键词
工程地质学
多氯联苯
电容器
物探
电法
磁法
engineering geology
PCBs
capacitor
geophysical exploration
electrical method
magnetic method
