Donghai Bridge

This entry is part 6 of 12 in the series Bridges

The Donghai Bridge is the second longest cross-sea bridge and the 6th longest bridge in the world.

Donghai Bridge

The bridge was the longest cross-sea bridge in the world for a few years until  Hangzhou Bay Bridge was opened on May 1st, 2008.

UPDATE:

Donghai Bridge

Has droped in the list to the 16th place on the list of the longest bridges in the world at the time of writing this in nov. 2019 and is the third bridge on the list from china.

Donghai Bridge

The Donghai Bridge (simplified Chinese: 东海大桥; traditional Chinese: 東海大橋; pinyin: Dōnghǎi Dàqiáo; literally "East Sea Grand Bridge") was completed on December 10th, 2005 and has a total length of 20.19 miles it connects Yangshan deep-water port and Shanghai in China.

Donghai Bridge

The majority of the bridge is low-level viaduct but there are also cable-stayed sections to allow large ships passage.

Donghai Bridge

Not sure how much steel was used in the construction of this bridge, but as always if I get these figures I will post them or if you have them feel free to comment so everyone can know.

Donghai Bridge under construction

Unrelated but could be of interest to you is the Donghai Bridge Wind Farm which is in the deep port producing 102 Mega Wats of offshore wind power that powers upto 200,000 homes, on july 6th 2010 it started pumping out power from these wind turbines and sent to the mainland grid to make it chinas first offshore wind farm.

Runyang Bridge

This entry is part 5 of 12 in the series Bridges

The Runyang Bridge or Rùnyáng Chángjiāng Dàqiáo crosses the Yangtze River in Jiangsu Province, China.  and is the 5th bridge in this series of worlds longest bridges

Runyang Bridge

The bridge consist of two major bridges that link Tangzhou on the north of the river and Zhenjiang on the South.  The bridge is part of the Beijing-Shanghai Expressway.

Runyang Bridge side view

The south bridge is a suspension bridge with a span of 4888 ft it is the 3rd longest suspension bridge in the world, and the longest in China up untill 2007 when the Xihoumen Bridge was opened and made it the 2nd longest in china and 4th in the world.


UPDATE:

Runyang Yangtze River Bridge

is now the fifth longest suspension bridge in the world and the 14 th longest overal bridge in the world comming in at a whooping 35.66 km or 22.16 miles of concrete and steel.


Runyang Bridge

The main span of the bridge consists of a streamlined orthotropic steel box girder that is 3 metres (10 ft) in depth. The width of the deck is 39.2 metres (129 ft), accommodating 6 traffic lanes and a narrow walkway at each outside edge for maintenance. The height clearance for river navigation is about 50 metres (164 ft), and the highest point on the suspension bridge is 215 meters (4890 feet) .

Runyang Bridge

The north bridge is a cable-stayed bridge with a span of 1332 ft with towers 492 ft abover water level.  In the middle of the two bridges is the island of Sivezhou.  The length of the bridge is 22.16 miles.  The construction of the bridge started in October 2000 and was opened to the public on April 30th, 2005 , it was opened ahead of schedule

Runyang Bridge south end

Runyang Bridge
润扬长江大桥

Hangzhou Bay Bridge

This entry is part 4 of 12 in the series Bridges

The Hangzhou Bay Bridge is the worlds 4th longest bridge 3rd longest over water bridge and the worlds longest Trans-oceanic bridge at 22.17 miles long . 

 Hangzhou Bay Bridge

Construction on this bridge started on June 8th, 2003 and was completed on June 14th, 2007.  The opening ceremony was on June 26th, 2007 even though the bridge was not officially open to the public until May 1st, 2008. This is as of this posting the longest bridge in China and was built to last at least 100 years. 


UPDATE:  Hangzhou Bay Bridge is no longer the 4th longest bridge in the world, as of today nov. 2019 it is now 13th it has droped 9 spots over the last 10-11 years due mostly to chinas rapid infrastructure growth over the same period.   China holds 6 of the top 10 longest bridges in the world, Hangzhou Bay Bridge has many bridges under construction that will soon be added to our list of worlds longest bridges.

Hangzhou Bay Bridge side view

Hangzhou Bay Bridge is a bridge with cable-stayed bridge portions across the Hangzhou Bay off the east coast of china.  The bridge was built in an s shape so that the annual silver dragon is minimally affected. The bridge has two main spans a 1,470 ft northern span and a 1,043 ft southern span.

Hangzhou Bay Bridge Air View

The bridge has 6 express lanes in two directions. The speed limit is 62 miles per hour.   Orthotropic steel deck is used on its main spans and five ramp bridges, and was paved with 50 millimeters (2.0 in) epoxy asphalt concrete. 

 Hangzhou Bay Bridge before completion

The bridge uses different colors and flashing lights to keep drivers from getting drowsy and pay attention to the road instead.  Previously the trip from Ningbo to Shanghai and southern Jiangsu involved a detour of around 400 km (249 mi), the bridge reduces that distance to 80 km (50 mi), a reduction of 320 km (199 mi).

Hangzhou Bay Bridge under construction

The result is that Ningbo, with its port at Beilun, will be able to compete with Shanghai’s port Pudong for international sea freight.

Hangzhou Bay Bridge under construction

This is just one of the investments China has made in it’s transportation infrastructure in the past few years.  

hangzhou bay bridge overview

The bridge is expected to boost tourism in Ningbo.  Again I do not have the figures on how much steel was used in the construction of this bridge but if you get it I will post it,  and as always if you have this information feel free to comment.

Under the Hangzhou Bay Bridge

Continue reading Hangzhou Bay Bridge

Manchac Swamp bridge

This entry is part 3 of 12 in the series Bridges

The Third bridge in this series, also the Third longest bridge in the world, and the second longest bridge over water.  The briidge is located in Louisiana, USA,  with a length of 23 Miles it comes in right behind  Lake Pontchatrain Causeway at (22.80 mi) and Bang Na Expressway (33.51 mi). we do not have much info about this bridge and I don’t know how much steel was used in it’s construction but if we get this information I will post it here, feel free to comment if you have these numbers.

Manchac Swamp Bridge

UPDATE: MANCHAC SWAMP BRIDGE is the second longest bridge in Louisiana but it is no longer the third longest bridge in the world as of today in Nov. 2019 it is now the 10th longest bridge in the world. the bridge is a little over one third of the highway's over lenght of 66miles.  The piles used in this bridge were driven 250 feet beneath the swamp 76 meters and was opened in 1979.   The bridge type is Trestle bridge and pile bridge.

Manchac Swamp bridge 1

This 120,374.02-foot concrete overpass only receives around 2,250 drivers a day. To this day this bridge is still an engineering feat that was built over alligator-infested waters that are rumored to be haunted, despite the legends it is a very safe bridge to drive over, but that doesn't stop superstitious tourist from visiting the bridge and lake every year.

Lake Pontchartrain Causeway

This entry is part 2 of 12 in the series Bridges

The Lake Pontchatrain Causeway

Lake Pontchartrain Causeway

also known as the Causeway is the worlds second longest bridge at 23.87 miles behind the Bang Na Expressway (33.51 mi) , the Causeway is the longest bridge in the world over water as of this posting. 

Lake Pontchartrain Causeway

The Lake Pontchatrain Causeway crosses over Lake Pontchartrain in southern Louisiana, USA.  The bridge connects Metairie, Louisiana, a suburb of New Orleans and Mandeville, Louisiana. 

Lake Pontchartrain Causeway air view

Although I don’t have the numbers on the amount of steel used in the building of this bridge I do know there are over 9000 concrete pillings supporting the bridge. 

Lake Pontchartrain Causeway overview

The The Lake Pontchatrain Causeway first opened in 1956 and was at that time a a two-lane span of 1/100th of a mile. bridges was expanded on and re opened on May 10th, 1969. This bridge is a toll bridge and always has been.

Lake Pontchartrain Causeway draw bridge section

More details on the Lake Pontchartrain Causeway, daily traffic is around 43,000 cars per day with a $5 USD toll southbound at the time of this update nov. 2019.  The bridge is supported by 9,500 concrete pilings.  In 2011 it was named the longest bridge over water by the Guinness World Records, after words it was divided in to 2 different categories continuous and aggregate.  It is considered the longest continuous bridge over water.  Jiaozhou Bay Bridge in China is the longest bridge over water aggregate.

After Hurricane Katrina Lake Pontchartrain Causeway lost 17 spans but structural foundations remained intact.  Lake Pontchartrain Causeway is 1 of 7 highway spans in Louisiana

 

Lake Pontchartrain Causeway 2
Lake Pontchartrain Causeway - 2 lane