Analysis of Common Problems in Lightning Detection of Buildings
2016-07-14ZhengHaixiangZhengJianweiXingSudanGuoLiangliang
Zheng Haixiang / Zheng Jianwei / Xing Sudan / Guo Liangliang
Analysis of Common Problems in Lightning Detection of Buildings
Zheng Haixiang / Zheng Jianwei / Xing Sudan / Guo Liangliang
AbstractIn view of the presence of some controversy in the current lightning detection of buildings, based on the relevant national standards, analyzing the lightning is dark enough or clear enough, ultra high-rise buildings of ball radius of different elevation at the parapet lightning device settings and power frequency grounding resistance and impact grounding resistance conversion and other problems, some effective methods to solve the problem for lightning pntection related professionals referencing are put forward.
Keywordsair-termination system, ball radius, grounding resistance, conversion
0引言
防雷检测是一项复杂、技术性要求较高的系统性工作,检测结论的权威性、公正性使判定结论更为严谨,每个防雷检测子项的合格与否影响整体工程项目的验收结论。由于设计、施工、检测方法等多方面原因,建筑物在防雷竣工检测过程中往往会存在许多问题,例如一些业主为了建筑外立面造型美观将高层屋面接闪带明装改成暗装,超滚球半径接闪器设置不全,防雷检测人员对工频接地电阻与冲击接地电阻概念混淆致使结论判定错误等。以上问题的出现有主观和客观两方面的原因,加大了工程项目整改难度,影响项目建设进度,增加建设成本。为确保建筑物防雷装置竣工检测能顺利通过,体现检测报告的公正性、权威性、科学性,应做到:1)防雷设计人员应严格按规范要求设计,从源头上避免因设计错误造成的不足。2)施工人员应结合现场实际情况仔细对比规范与设计图纸存在的差异,防雷隐蔽工程实施过程中发现问题应及时反馈给设计单位和业主,共同商榷经济、合理的解决方案。3)防雷检测人员应具备较高的业务素质和技能,检测过程中要认真执行规范,真正领悟规范本意,检测数据结果要经过不断推敲和精确计算,检测结论判定应有据可依,保证检测工作的质量。本文就接闪器暗敷与明敷、超滚球半径的高层建筑物不同标高处女儿墙接闪器的设置以及工频接地电阻与冲击接地电阻换算等防雷检测过程中常见的问题进行分析、讨论,并提出有效的解决办法,供防雷相关专业人员参考。……
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