深圳大运会体育场防雷设计释疑

Doubt Clearing of Lightning Protection Design of the Shenzhen Stadium for University Games

针对深圳大运会体育场防雷设计的主要问题:引下线间距超规、运动场地全面保护、屋面板保护及雷电过电压作了分析。就大运会的防雷设计与规范要求的接触电压、跨步电压、磁场强度作对比,数值均小得多,说明设计是安全的,也指出了需要处理的问题。等电位联结对于降低跨步电压、接触电压和防止雷电反击是十分有效的措施。

Aiming at the main problems of lightning protection design of the Shenzhen Stadium for University Games： the space between the down-conductor systems out of specification, overall protection of the sport grounds, protection of the roof panel and lightning over- voltage are analyzed. By comparing the touch voltage, step voltage and magnetic field strength of the lightning protection design with those of the requirements in the specification, the designed values are much smaller, which demonstrates that the design is safe. The problems to be dealt with are also pointed out. Equipotential bonding is a very effective measure for reducing step voltage and touch voltage and preventing from counter-attack.