Mangjiedu Bridge

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Mangjiedu Bridge
漭街渡大桥
Yongxin Yizu Xiang, Yunnan, China
722 feet high / 220 meters high
722 foot span / 220 meter span
2009


The ninth highest concrete beam bridge in China and one of the highest reservoir bridges in the world, Mangjiedu was constructed to cross the massive man-made lake that formed behind Xiaowan, the 2nd highest concrete dam in the world after the Jinping Dam. The spectacular 958 foot (292 mtr) high double curvature structure created a body of water some 820 feet (250 meters) deep along the Mekong (Lancang Jiang), a river with several of the largest and highest hydroelectric dams in the world including the Manwan, Dachaoshan, Nuozhadu and Jinghong. The Mekong River is the only international river in Asia linking 6 countries. The river has more species of fish than any other waterway on earth except for the Amazon.

Located about 30 miles (48 kms) from the dam, the Mangjiedu bridge opened in early 2009 high above the river with 551 foot (168 meter) tall piers rising high over the Mekong. By late 2009 the partially completed Xiaowan Dam had already submerged half of the bridge under water. Just two lanes wide, the narrow 722 foot (220 meter) main span of the continuous rigid-frame bridge seems even higher than it is, precariously balanced on the fourth highest set of bridge piers in all of China. The country is home to 9 of the world’s 10 highest reservoir bridges.

The Mangjiedu bridge is one of 4 massive continuous rigid-frame bridges that opened in Western China’s Yunnan province between 2003 and 2009. Three of the bridges are similar in height while only the Honghe bridge carries 4 lanes of traffic.

A visit to the Mangjiedu bridge requires no less than 3 days round trip from Yunnan’s capital city of Kunming. First you will need to take a bus, train or plane west from Kunming to the popular tourist city of Xiaguan. The next day you will want to get an early start and hire a driver who will then go south to Nanjian and then west to Dengtu. Expect an adventurous day filled with crazy driving and rough roads.



Mangjiedu Bridge Elevation


中国第二高度混凝土梁桥、世界第一高度库区大桥,漭街渡大桥建设并跨越了一个巨大的人工湖,这个湖在世界最高的混凝土大坝——小湾水电站建成之后形成。这座宏伟的292米高的双曲拱坝结构,在澜沧江上形成了一个250米深的巨大水体,澜沧江——拥有着世界上诸多最大最高的水电站的河流,其上建设了漫湾、大朝山、糯扎渡和景洪水电站。澜沧江是亚洲唯一一条流经6个国家的国际河流。除了亚马逊河之外,这条河流拥有的鱼的种类比地球上任何河流都丰富。

位于大坝30英里(48公里)左右的上游,漭街渡大桥高高跨立在河流之上,168m米高的桥墩的大部分都耸立在水库满水水位之上。仅仅2车道宽、220米主跨的很“窄”的连续刚构桥,看起来就比其实际高度要更高了,貌似艰难的平衡在中国第二高度的一系列桥墩之上。中国是世界前十高的库区大桥中9座的故乡。

漭街渡大桥是2003至2009年之间中国西部省份云南建成通车的4座特大连续刚构桥之一。其他三座相近高度的桥梁中,也仅仅只有红河大桥是四车道桥面。

要是去参观漭街渡大桥的话,从云南省会昆明出发至少需要不少于三天的旅途才能到达。首先你需要做的事情是,乘坐巴士,火车或者飞机从昆明到著名的旅游城市下关(大理)去。然后第二天你得想着赶个早儿,去雇一个司机,驱车向南先到南涧、再往西到永新,你至少得做好准备去面对充满惊险的疯狂驾驶和崎岖道路的一天。


Image by www.nipic.com



A late 2009 view showing the bridge half submerged.


Image by www.yunnan.cn



For those who might be interested, the list below shows the World's 10 Tallest Bridges as measured from the top of the foundation to the top of the tower. All are suspension or cable stayed bridges.


1. Hutong Bridge, China 345 meters

2. Millau Viaduct, France 336 meters

3. Russky Island Bridge, Russia 320 meters

4. Sutong Bridge, China 300 meters

5. Stonecutters Bridge, China 290 meters

6. Akashi-Kaikyo Bridge, Japan 287 meters

7. Chishi Viaduct, China 287 meters

8. Yi Sun-sin Bridge, South Korea 270 meters

9. Jingyue Bridge, China 265.5 meters

10. Guizhou Bridge, China 262 meters














Image by www.glkky.com


Image by Byszq921010.



The drawings above and below show how the Mekong River will rise approximately 150 feet (46 mtrs) from the reservoir created by the monstrous Xiaowan Dam.




Xiaowan became the tallest concrete dam in the world when it was completed in 2010.



Map of Mekong River dams.

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