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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。
In order to solve the difficulty of accurately locating the underground buried storage sites containing PCBs, a modern comprehensive geophysical prospecting method using the proton magnetometer high-precision magnetic method and the high-density electrical method of the Venus magnetometer was set up in combination with an engineering example to set the survey range of 60 m × 50 m, the layout of four electrical cross-section line, quickly and accurately determine the location of the seal point, the boundary and depth. A total of two underground storage points were found, all using cement mortar pouring. Thereinto no capacitor exists in the larger buried pit No.1 because of man-made disturbances, and the cement block is broken. The smaller buried pit2 on the east side is well preserved, and the buried depth of the capacitor is below 1.5 m. At the same time, the stratigraphic structure in the depth range of 10m in the survey area was explored.