The Yangtze River power line crossings are

overhead power lines An overhead power line is a structure used in electric power transmission and distribution to transmit electrical energy across large distances. It consists of one or more uninsulated electrical cables (commonly multiples of three for three-ph ...

that cross the

Yangtze River The Yangtze or Yangzi ( or ; ) is the longest river in Asia, the third-longest in the world, and the longest in the world to flow entirely within one country. It rises at Jari Hill in the Tanggula Mountains (Tibetan Plateau) and flows ...

China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's List of countries and dependencies by population, most populous country, with a Population of China, population exceeding 1.4 billion, slig ...

. There are at least three power line crossings on the Yangtze River at Jiangyin,

Nanjing Nanjing (; , Mandarin pronunciation: ), Postal Map Romanization, alternately romanized as Nanking, is the capital of Jiangsu Provinces of China, province of the China, People's Republic of China. It is a sub-provincial city, a megacity, and t ...

, and

Wuhu Wuhu () is a prefecture-level city in southeastern Anhui province, China. Sitting on the southeast bank of the Yangtze River, Wuhu borders Xuancheng to the southeast, Chizhou and Tongling to the southwest, Hefei city to the northwest, Ma' ...

. The towers of the crossing in Jiangyin are among the highest in the world.

Jiangyin

One exists at Jiangyin,

Jiangsu Province Jiangsu (; ; pinyin: Jiāngsū, alternatively romanized as Kiangsu or Chiangsu) is an eastern coastal province of the People's Republic of China. It is one of the leading provinces in finance, education, technology, and tourism, with its c ...

. Each pylon is situated at and at . It is a section of the 500 kV power line from the

Yancheng Yancheng () is a prefecture-level city in northeastern Jiangsu province, People's Republic of China. As the city with the largest jurisdictional area in Jiangsu, Yancheng borders Lianyungang to the north, Huai'an to the west, Yangzhou and Tai ...

power station A power station, also referred to as a power plant and sometimes generating station or generating plant, is an industrial facility for the generation of electric power. Power stations are generally connected to an electrical grid. Many ...

to the Dou Shan substation in the province of

Jiangsu Jiangsu (; ; pinyin: Jiāngsū, alternatively romanized as Kiangsu or Chiangsu) is an eastern coastal province of the People's Republic of China. It is one of the leading provinces in finance, education, technology, and tourism, with it ...

. The power line section running over the river has a

span width Span is the distance between two intermediate supports for a structure, e.g. a beam or a bridge. A span can be closed by a solid beam or by a rope. The first kind is used for bridges, the second one for power lines, overhead telecommunication lin ...

of . It is carried by two tall suspension towers, each weighing 4,192 tonnes. (for comparison, the towers even surpass the height of the

Eiffel Tower The Eiffel Tower ( ; french: links=yes, tour Eiffel ) is a wrought-iron lattice tower on the Champ de Mars in Paris, France. It is named after the engineer Gustave Eiffel, whose company designed and built the tower. Locally nicknamed ...

, which is , including antenna). They are identical

lattice tower A lattice tower or truss tower is a freestanding vertical framework tower. This construction is widely used in transmission towers carrying high voltage electric power lines, in radio masts and towers (a self-radiating tower or as a support for ...

s 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 An elevator or lift is a cable-assisted, hydraulic cylinder-assisted, or roller-track assisted machine that vertically transports people or freight between floors, levels, or decks of a building, vessel, or other structure. They ...

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

Dashengguan Railway Bridge approach spans

A dual circuit, 500 kV AC overhead powerline crosses the Yangtze River at

, 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 .

Wuhu

The HVDC Three Gorges-Changzhou powerline crosses the Yangtze River near

, Anhui Province,

, at and . The pylons were built in 2003. The crossing consists of two tall pylons built as constructions of tubular steel, which carry two conductors. The span width is . Close to it, there is a 500 kV AC powerline crossing with a span width of on probably taller towers and a 110 kV AC powerline crossing with a span width of . Both AC crossings have 6 conductors.

References

External links

* SkyscraperPage
Yangtze River Crossing - Pylon I
an
Pylon II

Yangtze River Crossing article from Elevator World magazine
*
Alimak lifts at work: Electricity transmission tower
{{supertall Powerline river crossings Yangtze River Electric power infrastructure in China

Jiangyin

Nanjing

Wuhu

See also

References

External links