High voltage DC leakage detection for double-lined hazardous waste landfill based on finite element method
According to the structural characteristics of hazardous waste landfill, a new model based on the finite element method (FEM) is developed. The detection layer is considered as a sealed space and it is assumed that total current flows through the leak for the high resistivity of geomembrane liner. The leak current is regarded as a positive point current +Iand the other current source is -I. Electrical potential of an arbitrary point in detection layer satisfies Poisson equation.Experiments for detecting leaks in liner were carried out. Excellent agreement between experimental data and simulated model data validates the new model. Parametric curves for a single leak show that with optimum selection of field survey parameters leaks can be detected effectively. For multiple leaks, the simulated results indicate that they are detectable when leak separation is larger than measurement spacing.
double-liner landfill, leakage detection, finite element method (FEM), parameter curve.
赵晓慈、张以都、杨萍、能昌信
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School of Mechanical Engineering and Automation, Beihang University, Beijing 100083, P. R. China
School of Mechatronic Engineering, China University Mining and Technology(Beijing), Beijing 100083, P. R.China
Computer Department, Industrial and Commercial Institute of Shandong, Yantai 264005, P. R. China
double-liner landfill, leakage detection, finite element method (FEM), parameter curve.
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