The architectural developments show us that what was once considered impossible may become an unquestionable achievement. When the Golden Gate opened in the thirties, people did not believe that someone could build longest bridges. The truth is that every time longer bridges are built, defying many architectural paradigms. In this post, you will find some of the longest bridges in the world and brief descriptions of their technical characteristics.
Lake Pontchartrain Causeway
The Lake Pontchartrain Causeway (New Orleans, Louisiana), has a length of 38.422 km. The highway bridge crosses Pontchartrain Lake and connects Metairie, a suburb of New Orleans, with Mandeville. It begins at the South Shore at Jefferson Parish and ends at the North Shore at St. Tammany Parish.
The bridge is an erected beam bridge of pre-stressed precast concrete sections with field extensions of 17 meters on a total of 9000 concrete pillars. It consists of two separate parallel structures, 24 meters apart, one of which was completed in 1956, the other in 1969. Since then, both directions have been separated in one-way traffic. On the older bridge the traffic goes south. Each direction has two lanes.
Jiaozhou Bay Bridge
The Jiaozhou Bay Bridge (or Qingdao Haiwan Bridge) links the city of Qingdao in Shandong Province with the Huangdao district through the waters of the northern sector of the Bay of Qingdao. Its length is 42.5 km and reduces the distance between the cities of Qingdao and Huangdao in 31 km, reducing travel time by half (approx. 40-20 minutes.)
The construction of the bridge lasted four years and employed more than 10,000 people. For its construction 450 000 tons of steel and 2.3 million cubic meters of concrete were needed. The design was provided by Shandong Gaosu Group. The bridge is designed to withstand earthquakes of high intensity, typhoons and ship collisions. The bridge is supported by over 5,000 pillars, and has a width of 35 meters, with 6 lanes and two hard shoulders. The cost of the bridge is about 14,800 billion yuan (USD 2.3 billion.) The bridge reduces the distance between the two points by half (30 km.)
Great bridge of Beijing
The Great Bridge of Beijing is a 48,153 km long viaduct of the Beijing-Shanghai rapid transit route. The bridge was made of prefabricated elements and is one of the fifth longest bridge in the world. The journey across the bridge takes about 20 minutes at a normal operating speed. The building begins about seven kilometers after the South Railway Station in Beijing, in the Fengtai district, south of the 4th Ring Road, crosses the Daxing district and ends in the Hebei province, just before the railway station. The beam bridge consists of prefabricated concrete parts, except for the Jingkai Expressway (G45 / G106), which is constructed with a curved bridge of hollow steel hollow beams. The supporting width of the arch bridge created in Free Vorbau is 108 m. It crosses the six motorway lanes and the two two-lane side streets.
Bang Na Expressway
This is a viaduct road 54 km long six-lane located in the city of Bangkok, Thailand (Bang Na-Bang Road Pakong.) The main axis is 55 km long and occupies a board to a height of 18.60 m. It is a bridge girder, 27 m wide, with an average length of 41.85 m in all sections.
Weinan Weihe Grand Bridge
This Chinese architectural marvel is the third longest bridge in the world. It was built for connecting two major cities: Zhengzhou and Xi’an. Its area of almost eighty kilometers crosses the Weihe River twice. It is made of concrete and serves as an important railway viaduct line.
Tianjin Grand Bridge
The second longest bridge in the world was built as a part of the Beijing-Shanghai High-Speed Railway and the Beijing-Tianjin intercity line. Its construction began in 2008 and finished in 2010. It has a remarkable length of 113.7 km. The bridge opened in June 2011 and it, starts a little southeast of Beijing, south of the train station. It crosses two districts to the center of the northern part of the city of Tianjin.
Danyang-Kunshan Grand Bridge
This is the current longest bridge in the world. Erected as part of the Beijing-Shanghai High-Speed Railway, its construction began in 2008 and was successfully completed in 2010. Its outstanding length is 164.8 m. The opening of the bridge took place on June the 30th 2011. It is located in East China’s Jiangsu Province, between the cities of Shanghai and Nanjing. Approximately 9 km of the bridge lies over the water surface, the largest body of water that crosses the Danyang-Kunshan Grand Bridge – Yangcheng Lake.