Radhe Krishna

Friday, July 1, 2011

Longest Bridges in the World

RADHE KRISHNA 01-07-2011

Longest Bridges in the World

`

The world's longest cross-sea bridge, spanning 36.48 kilometers across the mouth of the Jiaozhou Bay in China's eastern Shandong province, opened to traffic four years after construction started. Here's a peek into some of the world's longest bridges.

Lake Pontchartrain Causeway

Located in Louisiana, United States, the Lake Pontchartrain Causeway, consists of two parallel bridges that run parallel to each other. The bridges are supported by 9,500 concrete pilings and spans over 38.35 kilometres. The southern terminus of the Causeway is in Metairie, Louisiana, a suburb of New Orleans. The northern terminus is at Mandeville, Louisiana.

Donghai Bridge

Completed on December 10, 2005, the Donghai Bridge has a total length of 32.5 kilometres and connects Shanghai to the Yangshan port in China. The 'Donghai Bridge' is popularly known as 'The stone'.

Chesapeake Bay Bridge

The Chesapeake Bay Bridge is a four lane bridge that connects the Delmarva Peninsula's Eastern Shore of Virginia with Virginia Beach and the metropolitan area of Hampton Roads, Virginia. The bridge has a total length of 37 kilometres.

Vasco da Gama Bridge

The Vasco da Gama Bridge is a cable bridge with a total length of 17.2 kilometres. The bridge was opened to traffic on 29 March, 1998. The bridge spans across the Tagus River near Lisbon, Portugal.

Penang Bridge

The Penang Bridge opened to traffic on September 14, 1985 and connects Gelugor in Penang island and Seberang Prai to mainland Malaysia. The total length of the bridge is 13.5 kilometres.

Rio-Niteroi Bridge

The Rio-Niteroi Bridge is a box girder bridge that connects the cities of Rio de Janeiro and Niteroi. The bridge opened on March 4, 1974 and the total length of the bridge is 13 kilometres.

Confederation Bridge

The 12.9 kilometre long bridge opened on 31 May 1997, connecting the Prince Edward Island with New Brunswick, Canada. The Confederation bridge is a two-lane highway toll bridge.

San Mateo-Hayward Bridge

Commonly known as the San Mateo Bridge, the San Mateo-Hayward Bridge connects San Francisco Peninsula with the East Bay. The total length of the bridge is 11.265408 kilometres.

Seven Mile Bridge

The Seven Mile Bridge is is located between the Gulf of Mexico and the Florida Strait. Finished in 1982 at a cost of $45 million, the Seven Mile Bridge connects city of Marathon in the Middle Keys of Florida to Little Duck Key in the Lower Keys of Florida.

Thursday, June 30, 2011

China Opens Longest Sea Bridge on Thursday 30-06-2011

RADHE KRISHNA 01-07-2011

China Opens Longest Sea Bridge on Thursday 30-06-2011

`

A bridge too far? China has opened the world's longest sea crossing. The eight-lane, 35-metre-wide structure cost £1.4bn. Photograph: KeystoneUSA-Zuma/Rex Features
China, which seems to complete mammoth infrastructure projects on a routine basis, has claimed another world-beater with the opening of the longest sea bridge.

The 26-mileJiaozhou Bay crossing connects the bustling port city of Qingdao, south-east of Beijing, to the industrial district of Huangdao.

The eight-lane, 35-metre-wide bridge opened to traffic on Thursday morning, China's Xinhua news agency said. Built over a four-year period the project cost about £1.4bn and uses 5,000 pillars. It shortens the driving route between the two locations by about 20 miles.

Somewhat inevitably, the bridge takes the world record from another Chinese sea crossing, the 22.5-mile Hangzhou Bay bridge, which opened in 2008, connecting the cities of Jiaxing and Ningbo, south of Shanghai. The Lake Pontchartrain Causeway in Louisiana, at almost 24 miles, is slightly longer but crosses an inland waterway rather than open sea.

China is constructing an even more ambitious bridge. Work began in December 2009 on a Y-shaped structure linking Guangdong province in southern China to Hong Kong and Macau. Building is expected to be finished in 2015, and the bridge is expected to cover about 31 miles, although only about 22 miles will span the sea.

China has opened the world’s longest cross-sea bridge - which stretches five miles further than the distance between Dover and Calais.
The Jiaozhou Bay bridge is 26.4 miles long and links China’s eastern port city of Qingdao to the offshore island Huangdao. The road bridge, which is 110ft wide and is the longest of its kind, cost nearly £1billion to build.
Chinese TV reports said the bridge passed construction appraisals on Monday and it, along with an undersea tunnel, would be opened for traffic yesterday. It took four years to build the bridge, which is supported by more than 5,000 pillars across the bay, and it is almost three miles longer than the previous record-holder - the Lake Pontchartrain Causeway in Louisiana. That structure features two bridges running side by side and is 23.87 miles long.
Two separate groups of workers have been building it from different ends of the structure since 2006. After linking the two ends of the bridge on December 22, one engineer said: ‘The computer models and calculations are all very well but you can’t relax until the two sides are bolted together. Even a few centimetres out would have been a disaster.’
The engineering feat will only hold the record as the longest sea bridge for a few years - it will be beaten by another Chinese bridge in the next decade.
Last December officials announced workers had begun constructing a bridge to link southern Guangdong province with Hong Kong and Macau. Set to be completed in 2016, officials said the £6.5billion bridge will span nearly 30 miles.
It will be designed to cope with earthquakes up to magnitude 8.0, strong typhoons and the impact of a 300,000 tonne vessel. But both structures will still be dwarfed by the longest bridge in the world, also in China.

Longest sea Bridge in China

RADHE KRISHNA 01-07-2011

Longest sea Bridge in China

`

This photo taken Tuesday, June 21, 2011 released by China's Xinhua news agency shows
the Jiaozhou Bay Bridge in Qingdao, east China's Shandong Province. China opened Thursday, June 30, 2011, the world's longest cross-sea bridge, which is 42 kilometers (26 miles) long and links China's eastern port city of Qingdao to an offshore island, Huangdao. (AP Photo/Xinhua, Yan Runbo)

Qingdao Jiaozhou Bay Bridge is seen in Qingdao, Shandong province, in this general view taken June 27, 2011. The world's longest sea bridge spanning Jiaozhou Bay of Qingdao City, Shandong Province, opened on Thursday, June 30. The bridge is 36 km (22 miles) long, Xinhua News Agency reported. Picture taken on June 27, 2011. REUTERS/China Daily

This photo taken Tuesday, June 21, 2011 released by China's Xinhua news agency shows the Jiaozhou Bay Bridge in Qingdao, east China's Shandong Province. China opened Thursday, June 30, 2011, the world's longest cross-sea bridge, which is 42 kilometers (26 miles) long and links China's eastern port city of Qingdao to an offshore island, Huangdao. (AP Photo/Xinhua, Yan Runbo)

A band plays during the opening ceremony of the Qingdao Jiaozhou Bay Bridge in Qingdao, Shandong province June 30, 2011. The world's longest sea bridge spanning Jiaozhou Bay of Qingdao City, Shandong Province, opened on Thursday. The bridge is 36 km (22 miles) long, Xinhua News Agency reported. REUTERS/China Daily

A sign that reads: "Shandong Highway Corp. invests to operate Shandong Highway Jiaozhou Bay Bridge" is seen at Qingdao Jiaozhou Bay Bridge in Qingdao, Shandong province June 27, 2011. The world's longest sea bridge spanning Jiaozhou Bay of Qingdao City, Shandong Province, opened on Thursday, June 30, 2011. The bridge is 36 km (22 miles) long, Xinhua News Agency reported. Picture taken June 27, 2011. REUTERS/China Daily

This photo taken on Wednesday, June 29, 2011 released by China's Xinhua news agency shows the Jiaozhou Bay Bridge in Qingdao, east China's Shandong Province. China opened Thursday, June 30, 2011, the world's longest cross-sea bridge, which is 42 kilometers (26 miles) long and links China's eastern port city of Qingdao to an offshore island, Huangdao. (AP Photo/Xinhua, Yan Runbo)