基质结构对土壤冲击特性的影响

发布时间：2018-02-13 18:40

本文关键词： 土壤基质结构团聚性土粒粒径土壤冲击电阻率临界击穿场强击穿时延　出处：《高电压技术》2017年11期 　论文类型：期刊论文

【摘要】：研究基质结构差异对土壤冲击特性的影响,在细化土壤介质冲击理论、完善防雷接地研究方面有着十分重要的意义。因而分析了不同基质结构土壤的导电机理;搭建了土壤冲击实验平台,通过实验方法研究了受不同基质结构影响的土壤冲击特性。实验结果表明:对于基质为非团聚性结构的土壤,在相同含水量条件下,土壤的冲击电阻率、临界击穿场强和击穿时延均随着土壤粒径的增大而增大,且3者均受到土壤孔隙率和粒径均匀度的影响;对于基质为团聚性结构的土壤,土壤的冲击特性不符合以上规律,且在相同含水量时,红黏土的导电性要弱于均匀粒径的砂质土;用细砂替代土壤开展土壤冲击特性研究是片面的。
[Abstract]:It is very important to study the effect of matrix structure difference on soil impact characteristics, which is of great significance in refining the theory of soil medium impact and perfecting the study of lightning grounding. Therefore, the conductive mechanism of soils with different substrates is analyzed. A soil shock test platform was set up, and the soil shock characteristics affected by different substrate structures were studied by means of experiments. The results showed that: for the soil with non-aggregate structure, the same water content was used. The impact resistivity, critical breakdown field strength and breakdown time delay of soil increased with the increase of soil particle size, and all three were affected by soil porosity and particle size uniformity. At the same water content, the electrical conductivity of red clay is weaker than that of sandy soil with uniform particle size, and it is unilateral to study the impact characteristics of red clay with fine sand instead of soil.
【作者单位】：西南交通大学电气工程学院;国网山东省电力公司潍坊供电公司;广东电网公司惠州供电局;云南电网公司电力科学研究院;
【基金】：国家自然科学基金(51325704)~~
【分类号】：TM86

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