高原多年冻土地区降低接地电阻的试验研究
Experimental Investigation on Reducing Gounding-Resistance in PerennialFrozen SedimentAreas
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摘要: 为解决青藏铁路沿线冻土地区防雷接地工程问题,针对高原冻土地区的土壤特性,选择与青藏铁路沿线 冻土类似的多年冻土地区进行降低接地电阻的模拟试验.探讨了在多年冻土地区影响土壤电阻率的因素和使用 低电阻接地模块降低接地电阻的工程方法.证明了低电阻接地模块在降低高原冻土接地电阻方面具有比较好的 效果,可采用多个接地模块并联达到防雷接地工程的设计要求.Abstract: To solve the problem ofgrounding for lighting along theQinghai-Tibetrailway, experiments were conducted in an perennial frozen sediment area, where there were similar environments as the sections of theQinghai-Tibetrailway. The factors affecting the resistivity of frozen soilswere discussed, and some solutions to grounding for lightning using groundingmoduleswere introduced. It is verified that the groundingmoduleshave good performance for reducing grounding resistance in perennial frozen sediment areas, and the design requirements can be fulfilled by parallelly connecting necessary number ofgroundingmodules.
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Key words:
- grounding for lightning /
- plateau /
- frozen soils /
- resistivity /
- grounding-resistance /
- groundingmodul
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