电瓷避雷器Issue(3)：10-17,8.DOI:10.16188/j.isa.1003-8337.2026.03.002
输电线路大开挖板式混凝土桩基外敷接地降阻方法研究
External Grounding Resistance Reduction Method for Large Excavation Slab Concrete Pile Foundation of Transmission Line
摘要
Abstract
Aiming at the problems of poor soil dispersion ability in high soil area,excessive natural grounding resistance of pile foundation and difficulty in laying artificial grounding electrode in large area and long distance under limited area,based on the process and characteristics of large excavation founda-tion construction,the author puts forward two kinds of external application resistance reduction schemes of large excavation foundation along the surface and spiral external application of transmission line,and verifies their resistance reduction effects.Firstly,according to the actual structure size of the large exca-vation plate foundation,the simulation calculation model of natural grounding,surface external applica-tion and spiral external application of the large excavation pile foundation of the transmission line is estab-lished.Then,the grounding current dispersion characteristics of single pile foundation are calculated and analyzed,and the resistance reduction effects of two external grounding resistance reduction schemes are compared.Finally,the resistance reduction efficiency of the whole tower pile foundation with external re-sistance reduction is calculated,and the influence of pile foundation concrete resistivity and soil condi-tions on the external grounding resistance and resistance reduction efficiency of the whole tower pile foun-dation is analyzed.The results show that the surface external application and the spiral external applica-tion change the direction of the pile foundation,and significantly reduce the grounding resistance of the pile foundation.Considering the resistance reduction effect and cost,the double-sided external applica-tion is the most suitable external application resistance reduction scheme.When the soil resistivity is 1 500 Ω·m,the resistance reduction efficiency still reaches 60.94％,which can provide a reference for the actual transmission line tower grounding resistance reduction.关键词
大开挖基础/散流特性/沿面外敷/螺旋外敷/降阻效率Key words
large excavated foundation/dispersing characteristics/external application along the surface/spiral external application/resistance-diminishing efficiency引用本文复制引用
冯守信,孙恒东,胡元潮,季天程,黄涛,范舟..输电线路大开挖板式混凝土桩基外敷接地降阻方法研究[J].电瓷避雷器,2026,(3):10-17,8.基金项目
国家自然科学基金青年基金(编号:52304068),山东省自然科学基金面上项目(编号:ZR2021ME092),国网江苏省电力有限公司科技项目(编号:SGJSJSOOXMJS2310261).Project supported by National Natural Science Foundation Youth Fund(No.52304068),General Project of Shandong Provincial Natu-ral Science Foundation(No.ZR2021ME092),Science and Technology Project of State Grid Jiangsu Electric Power Co.,Ltd.(No.SGJSJSOOXMJS2310261). （编号:52304068）
