苏联铁路对于多年冻土地带采取八种接地方式,以作为防护或测量用地线。这八种接地方式为:1.垂直深埋地线:把管形、棒形或钢杆形的金属导电材料作为接地电极埋入不小于10米深度的土壤中。2.水平延伸地线:地线水平延伸,使接地电极与土壤接触更好,以减少接地电阻,在夏季使用较合适。 The Soviet railway uses eight ground connections for the permafrost zone as a ground for protection or measurement. The eight grounding methods are: 1. Vertical buried wire: the tubular, rod or steel-shaped metal conductive material as a grounding electrode embedded in the soil depth of not less than 10 meters. 2. Horizontal extension of the ground: the horizontal extension of the ground so that the ground electrode contact with the soil better to reduce the grounding resistance, the more appropriate use in summer.