Finite element simulation of high voltage direct current electricity technology for double liner landfill leakage detection

According to the structure character of hazardous waste landfill (HWL) a finite element mode (FEM) of HWL detection sealed space was established; the finite element analysis technique of detection layer sealed space electrical potential distribution was determined. In FEM, the leak cave position adding electric current +I was used to simulate the leak cave current; the received electrode position adding electric current –I was used to simulate the received electrode, in detection layer, the electric potential of random point was the repeated addition of two electric current sources. Comparing the results of upper and lower membranes leakage test and finite element computer simulation proved that the model was correct. Through analyzing the distribution factor influencing electrical potential, the more near the detection electrode to the detected membrane and the greater the loop electric current, the more favorable to cave detection; the greater the influence range of the leaked liquor, the more the unfavorable to the detection.