摘要
以树木及其邻近民居防雷措施的相互影响为研究对象,详细分析安装接闪装置的树木与邻近民居防雷电反击相关要求,得出:防雷电反击相关要求可以看作是树木接地体的冲击接地电阻R_i与安全距离S_(a1)二者的约束条件,R_i和S_(a1)的设计要求值除了依照规范设计外,还应结合该约束条件综合考虑;各自独立设计防雷装置的树木与民居建筑尚应考虑地下接地体间及与金属管道的安全距离;当实际工程中R_i和S_(a1)无法满足防反击要求时,应采取其他防护措施。
Based on the research on the mutual effect of protection against lightning measures adopted for trees and nearby civilian houses, the article analyzes the requirements on protection against lightning back flashover for trees and nearby civilian houses where air-termination system are provided, and comes to the following conclusions： requirements on protection against lightning back flashover can be understood as the constraints on the impulse earthing resistance （Ri） and safe distance （Sal） of tree＇s earthing electrode; the design value of Ri and Sai shall be set according to specification and such constraints; safe distance among underground earthing electrodes and metal pipelines shall be considered for trees and civilian houses adopting separate protection against lightning device; in case Ri and Sal in actual works cannot meet protection requirements, other protection measures shall be taken.
出处
《建筑电气》
2016年第2期54-57,共4页
Building Electricity
关键词
树木
民居
防雷
接闪装置
安全距
离
防反击
冲击接地电阻
trees
civilian house
protection against lightning
air-termination system
safe distance
protection against back flashover
impulse earthing resistance
