The injury of rain melody

From 1954 to 12 to 1955+0 10, a snowstorm occurred in the plain of Dongting Lake area, Hubei Province, with an accumulated ice thickness of 70 ~ 80 mm. In Hunan power grid with an altitude of 150 ~ 600 m, the maximum thickness of conductor icing is 70 ~ 80 mm, which is rare in history. From February 13 to February 16, 2005, three lines of Hunan 500kV power grid were disconnected due to icing.

1969 A severe freezing rain in northern Guangdong interrupted telecommunication traffic in northern Guangdong, and industrial and mining enterprises stopped working for more than a week.

1972 February/kloc-0 ~ 8, large-scale freezing rain occurred in Hunan, Guizhou, Jiangxi and other places, and the wires in the most serious areas were frozen nearly 10 cm thick. Make telegrams and telephones unusable.

From 1973 to 65438+February, in Qitai County, Xinjiang, a rain dome with a maximum diameter of 24 cm, a thickness of 18 cm and a weight of 224 g per meter, Jim's first rain dome lasted for 60 hours, with a maximum diameter of 7 cm, which broke the wires and caused communication interruption. The overhead communication line from Urumqi to Tacheng often needs to organize manpower to break the ice every winter to ensure the normal communication.

1977+001On October 27-28, a rare snowstorm occurred in Saihanba Forest Farm, Chengde City, Hebei Province. The affected area was 400,000 mu, accounting for more than half of the forest area at that time, causing more than 600,000 trees to break, including 200,000 mu in the hardest hit area and more than 5,000 trees to be lost. The loss of wood is about 960,000 cubic meters, which is about 27-28 million yuan.

1979 65438+1From October 28th to February 3rd, the urban area of Qingdao, Shandong Province and some counties and districts suffered from continuous snowstorms, which led to the power supply stop in Pingdu section of Ludong Power Grid. The snowstorm in Jiaonan county reached 20 ~ 70 mm, with a loss of more than 2 million yuan.

A snowstorm in Linyi, Shandong, once froze a layer of ice weighing 3.5kg on a telephone line with a length of 1m, causing huge losses.

1997 65438+From February 26th to 30th, a rare snowstorm occurred in a forest farm in Weichang County, Hebei Province. Eight wires between every two poles are frozen, weighing 1 ton. The wires were broken, the telephone poles were crushed, the trees were frostbitten, and the losses were serious.

1 998 65438+February1,rainy weather occurred in Suqian, Xinyi, Pizhou and Donghai, Jiangsu Province, and the diameter of ice accumulation reached 4 ~ 16 mm, and there was1/kloc-on the high-voltage line in Xuzhou City. On February 25-26, 2005, freezing and obvious snowstorms occurred in counties and districts north of Lingui, which had a great impact on evergreen fruit trees in Guilin. Some areas suffered serious losses, especially citrus, loquat and other fruit trees, and their crowns, branches, leaves, young loquat fruits and summer oranges were frozen.

On February 6, 2005, there were 18 counties and cities in southwest Hubei, Jianghan Plain and northeast Hubei. The diameter of ice accumulated in 6 hours was 2 ~ 8 mm, and the maximum diameter of rime ice accumulated in 6 hours was 20 mm. As a result, more than 40 Wufeng 1 10 kV transmission towers collapsed, and four 1 10 kV transmission lines were damaged, resulting in power supply paralysis and power grid structure destruction, which posed a great threat to the operation of Central China Power Grid. At the same time, rainy weather has increased traffic accidents. There were more traffic accidents in Huanggang in February than in the same period of last year 10 percentage point. The pavement of Wufeng Highway was damaged by snow chains for 600 kilometers. In Changyang County, the section from Hejiaping to Lang Ping of National Highway 3 18 was blocked by snow and ice, and the Tianzhu Mountain section of the southern highway was closed, and the Jin Shanshan section of Wang Yu Line 12 was also closed for one day. Danjiangkou of Shiyan-Han Shi Expressway was closed several times; The road surface in the second mountain area was covered with snow and frozen for a long time, and the traffic in the three southern counties was interrupted for 3 to 5 days.

On February 8, 2005, rain and snow continued in Youyang area in the southeast of Chongqing. Chongqing Power Grid Youyang, Wulong and other areas have suffered from severe weather and low temperature that have not happened for more than 20 years, respectively, resulting in large-scale rainstorms. Many power lines were covered with ice more than 50 mm, which led to the collapse of the multi-base tower of 1 10KV Qianxiulong line, resulting in a large-scale power outage and serious impact.

In late June, 2008, 1, severe line icing occurred in central China, causing power outages in many provinces of1. It is reported that: (2008) Changsha 65438+1October 27th (Reporter Xie Photography Liu) The news came from Hunan Power Transmission and Transformation Company. Yesterday afternoon 14: 40, the transmission company of the third branch of the company was carrying out the artificial deicing task of the 500 kV line in Shaping substation of Huadian Changsha Power Plant, and the tower collapsed due to serious icing on the line.

According to the arrangement of Hunan Power Transmission and Transformation Company, the Third Power Transmission and Transformation Company organized artificial deicing of the line on the 26th. At that time, the ice thickness of insulator string and conductor on the tower greatly exceeded the design standard. Luo, Luo Changming and Zhou Jinghua are in charge of the deicing task of Tower 43.

They knocked off the ice with wooden sticks and wrenches on wires and insulator strings more than 50 meters above the ground. During the operation at 14: 40 in the afternoon, towers 44, 43 and 4 1 collapsed instantly due to the heavy weight of ice and snow. Zhou Jinghua, who was working on Tower 43 at that time, was cut off by a sharp angle iron and fell from a height of more than 50 meters, and died immediately. Luo Changmin and Tam Sea, who knocked on the ice with the same tower, also collapsed with the tower and were seriously injured. Rescuers who heard the news quickly sent him to 163 hospital for rescue, and eventually died of his injuries. (Meteorological Port, 2008.0 1.28) (2008, 1.00) When interviewed in Quanzhou, Guanyang, Ziyuan and other places in northern Guangxi, the reporter saw that the wire with thick fingers was wrapped in a whole circle of thick ice after being attacked by snow and ice, which was thicker than the arm. In many places, telephone poles are bent and unbearable. Every 2-3 kilometers, you can see the fallen telephone poles. Since June 22, 65438, Quanzhou, Guanyang and Ziyuan counties have been unable to continuously supply electricity.

In Hunan, the total length of the power grid backbone lines is nearly 6000 kilometers, and tens of thousands of electric workers are repairing the "frostbitten" power grid in the snow-capped mountains. In Guizhou Province, which suffered the most from freezing rain and snow, the 500 kV power grid in the province was basically paralyzed, and 4 1 city and county was blacked out.