江蘇高速公路收費站一次雷擊事故分析

doi:10.3969/2012jms.00**

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江蘇高速公路收費站一次雷擊事故分析
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                        10.3969/2012jms.00**
                    
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An analysis on a lightning accident at a Jiangsu highway toll station

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本文對2010年8月3日19時30分沿江高速公路張家港收費站一次嚴重雷擊事故的雷暴過程進行診斷分析,并對其防雷工程存在問題進行綜合探討。分析得出:這次雷暴發(fā)生在副熱帶高壓邊緣環(huán)流形勢下,雖副熱帶高壓強大,但大幅度東退,面積明顯減小,脊線位置和流場也出現調整。江蘇上空由西南氣流轉為西北氣流影響,北方有弱冷空氣沿西北氣流南下,引發(fā)江蘇降溫,為大氣不穩(wěn)定的增強和觸發(fā)不穩(wěn)定能量的釋放提供重要條件;本文還分析了雷暴與對流參數關系及演變特征,并探究不穩(wěn)定參數在雷暴發(fā)生中的作用。根據現場調查,分析出這次收費站雷擊事故在防雷工程方面存在設備接地、等電位、線路屏蔽、電涌保護器設置、安裝和接地電阻等問題,最后針對這些問題提出6點防雷工程整改建議。

Abstract:

This paper performed diagnosis analysis on the strong thunderstorm process of a lightning accident occurred at Zhangjiagang toll station of the highway along the Yangtze River in Jiangsu Province, and discussed comprehensively about the problems of its lightning protection engineering. The result showed that the thunderstorm occurred at the edge of subtropical high circulation, the subtropical high was strong, but it decreased eastward significantly, and the ridge location and the flow field changed accordingly. The northwest airflow of the eastern side of the subtropical high, combined with the weak cold air going southward from the north along the northwest airflow, made the temperature in Jiangsu going down quickly and provided important conditions for the enhancements for atmospheric instability and the triggering for the release of instable energy. This paper also analyzed the relation between strong thunderstorms and convective parameters and their evolution, and explored the role that the superior unstable parameters played in the strong thunderstorms. According to field investigations and analysis at the lightning accident at the toll station, several problems of the lightning protection engineering were found involving equipment grounding, equal potential, line screen, the setup and installation of surge protectors, grounding resistance, and so on. And we suggest 6 items of lightning protection engineering rectification according to the above-mentioned problems.

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程琳,裴曉芳,沈剛,周俊馳,錢美.江蘇高速公路收費站一次雷擊事故分析.氣象科學,2011,(s1):120-125 CHENG Lin, PEI Xiaofang, SHEN Gang, ZHOU Junchi, QIAN Mei. An analysis on a lightning accident at a Jiangsu highway toll station. Journal of the Meteorological Sciences,2011,(s1):120-125

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收稿日期:2011-11-30
最后修改日期:2012-02-16
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在線發(fā)布日期: 2012-09-25
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