|
The Yangtze River power line crossings are overhead power lines that cross the Yangtze River in China. There are at least three power line crossings on the Yangtze River at Jiangyin, Nanjing, and Wuhu. The towers of the crossing in Jiangyin are among the highest in the world.〔(【引用サイトリンク】title=Chinese power grid workers brave heights of 885ft - the equivalent of a 90-storey building - to install world's tallest pylons )〕 ==Jiangyin== One exists at Jiangyin, Jiangsu Province, China. Each pylon is situated at and at . It is a section of the 500 kV power line from the Yancheng power station to the Dou Shan substation in the province of Jiangsu. The power line section running over the river has a span width of . It is carried by two tall suspension towers, each weighing 4,192 tonnes, and both are among the tallest electricity pylons in the world (for comparison, the towers even surpass the height of the Eiffel Tower, which is , including antenna). They are identical lattice towers of square cross section with an area of × 68 m at the base and × 8 m at the top. The pylons carry four conductors on the lower crossarm, above ground, with a length of and two conductors on the upper crossarm. The insulator strings are long. These pylons are both equipped with an elevator which runs in a cylindrical tube in its center. A spiral staircase circles the elevator shaft outside. On each side of the river are each main span pylon, followed by two anchor towers; one for each circuit. The anchor pylons are each tall, weigh 110 tonnes and stand on an area of . Construction of the pylons started on November 8, 2002. They were completed on April 13, 2004. On November 18, 2004, the power line went into service. ==Nanjing== A dual circuit, 500 kV AC overhead powerline crosses the Yangtze River at Nanjing, Jiangsu Province, China, built in 1992. It uses two tall pylons built of reinforced concrete, which may be the tallest pylons built out of concrete in the world. They are situated at and at and carry 6 conductors in two levels. The span width is . 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Yangtze River power line crossings」の詳細全文を読む スポンサード リンク
|