为了探讨土壤特性对埋地金属管道沿线电流密度的影响，通过CDEGS软件建立了直流接地极与埋地金属管道的仿真计算模型，对不同土壤特性下金属管道沿线的电流密度进行了对比分析。结果表明：在均匀土壤中，管道电流密度随着土壤电阻率的增大而增大；在水平两层土壤中，随着表层土壤电阻率的增大，管道电流密度减小，随着底层土壤电阻率的增大，管道电流密度增大，底层土壤电阻率的变化对管道两端电流密度影响尤为明显，表层土壤厚度的变化对管道电流密度的影响较小。

In order to investigate the influence of soil properties on the current density along buried metal pipe,the simulation model of DC grounding electrode and buried metal pipe was established by CDEGS software.The current densities of metal pipes under the condition of different soil properties were analyzed comparatively.The results show that in homogeneous soil,the current density of pipe increased with the increase of soil resistivity.In horizontal two-layer soil,the current density of pipe decreased with the increase of the resistivity of top soil,and the current density of pipe increased with the increase of the resistivity of bottom soil.The change of the resistivity of bottom soil had a significant effect on the current density at both ends of the pipe.The change of top soil thickness had less influence on the current density of the pipe.