American Pride - the longest bridge in the world
• Pride of America - the longest bridge in the world
If you look at the list of the longest bridges in the world, Asian countries occupy a leading position, especially China, indicating that the rapid economic development of the country. In addition, China produces and consumes about 60% of global cement - between 2011 and 2013, China has used so much cement as the United States used for the whole XX century.
In recent years, China has managed to raise the bar in building bridges to new heights by constructing bridges, which beat the world record. Of the top ten longest only two bridges are not built in Asia and in the US - a country known for its engineering and technical wonders. One of the bridges connecting the shores of Lake Ponchartrain in Louisiana.
Lake Pontchartrain Causeway consists of two bridges, each 38 kilometers in length. One was built in 1956, another, slightly longer than its predecessor, it was completed in 1969. And since then, the bridge-dam held the title of the longest bridge across the expanse of water in the world. Built Jiaozhou Bay Bridge in 2011 in China has become a threat to the American brother, but representatives of the Guinness Book of Records quickly come up with a new category to save the United States from an international embarrassment.
Lake Pontchartrain Causeway is a monumental achievement for civil engineers, not only because of its infinite length, but also because of improved technological methods.
Standard practice was to use the whole square or cylindrical concrete piles with a diameter of 24 inches, with the construction of bridges. It was during the construction of the bridge across Lake Ponchartrain 54-inch in diameter, hollow cylindrical piles of prestressed concrete was first used, which were larger and stronger than normal. Yes, we wanted these piles considerably smaller, which reduces the cost of construction.
And when such historic in every sense of the bridge challenge another country, it is no surprise that the official representatives of the Lake Pontchartrain Causeway is not only offended, but also decided to act, to find than parry. Chinese steel bridge experience and research and, in the end, we found the omission.
Jiaozhou Bay Bridge, whose construction cost 2, $ 3 billion, has a length of 41, 5 km, that is, he is more than 3 kilometers of superior American Bridge. But representatives of the bridge-dam through Ponchartrain argue that such a length achieved by the curve of the bridge. In fact, the actual distance, cross the bridge - about 25 kilometers.
The representatives of the Guinness Book of Records had already demoted American bridge to second place, and decided that the best way out situation would be to create a new category. And Lake Pontchartrain Causeway was the longest bridge over a body of water (continuously over the entire length), and the Chinese - the longest on the total duration. And all were satisfied.
However, soon the Chinese record holder will have to make room - in 2017. The need to build a bridge of Macau-Zhuhai-Hong Kong, whose length will be 50 kilometers, and it will connect Hong Kong, Macau and Zhuhai.
Photo Lake Ponchartrain satellite. Bridge almost bisects the water space.
Lake Pontchartrain Causeway.
Comparison of two bridges - the US and China.
Jiaozhou Bay Bridge. A satellite image.
Jiaozhou Bay Bridge.