大连地铁明挖车站降阻措施研究

在地铁设计中,接地是非常重要的部分,影响人身安全及运营安全,大连地铁地下为岩石结构,土壤电阻率非常大,经过对垂直接地体法、非金属降阻模块法、双层接地网法等3种接地方法的计算对比,以及经济、安全性等综合方面考虑,选用了双层接地网法对大连地铁明挖车站进行降阻。

Study on Resistance Reduction Measures for Dalian Cut and Cover Metro Station

In metro design, the grounding is a very important part, which may impact personal safety and operational safety. Dalian metro underground rock structures have very big soil resistivity. After calculation and comparison of 3 grounding methods including the vertical grounding, non-metallic resistance reduction modular approach, and double -grounding grid method, as well as the studies of cost effectiveness, safety and other considerations, a double-grounding grid for Dalian cut and cover metro stations is selected to reduce resistance.