Daninghe River Bridge

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Daninghe River Bridge
大宁河桥
Wushan, Chongqing, China
719 feet high / 219 meters high
1,312 foot span / 400 meter span
2010


The largest and most spectacular bridge on the new highway that skirts along the north side of the Yangtze River’s famous 3 gorges region, the muscular Daninghe arch bridge carries 4 lanes across the famous Daning River in a single bound of 1,312 feet (400 mtrs). Completed in 2010, it ranks among the 12 longest arch spans on earth. The new 4-lane expressway is one of two major arteries that will connect Yichang and points east to the once isolated super cities of Western China including Chongqing and Chengdu. The other new Yangtze River bypass is the West Hurong expressway in the mountains along the south side of the river with an unprecedented 10 bridges over 500 feet (152 mtrs) in height including Siduhe, the World’s Highest Bridge.

As with most of China’s largest steel arch bridges, the Daninghe was constructed using the stayed cantilever method whereby a tower is erected on either side of the gorge and cables temporarily radiate out from it to support individual sections of the arch until the two halves can be joined in the middle.

The bridge is both a physical and spiritual replacement for the Dragon’s Gate bridge that once spanned the mouth of the Daning River before the rising waters of the 3 Gorges reservoir forced its removal. The concrete arch gateway marked the starting point for millions of tourists on their boating adventure up the most spectacular tributary of the entire Yangtze River 3 Gorges region - the Daninghe. Known as the Lesser Three Gorges to differentiate it from the Yangtze River, a trek up the Daninghe reveals more than just one of China’s largest arch bridges. The initial Dragon Gate gorge has many wonders beginning with the longest plank walkway in China. Further along is Misty Gorge with beautifully sculptured stalactites tagged with colorful names like Monkey Fishing in the Air and Fairy Peach Peak. Continuing into the final Emerald Gorge, boats pass such landmarks as the Sky-Scraping Red Wall and Flying Clouds Cave.



Daninghe River Bridge Elevation


作为长江三峡库区北岸的新建公路干线的最大和最雄伟的一座大桥,4车道宽的大宁河拱桥跨越了400米的著名的大宁河。在2009年建成之后,它成功跻身于世界前12高的拱桥之列。这条新建的四车道高速路,是将宜昌和中国西部内陆地区被隔离的超大城市重庆、成都成功相连的两条干线之一。另外一条沿着长江南岸而建的高速公路是在崇山峻岭中穿行的沪蓉西高速公路,其上有着前所未有的高度在152米之上的十座桥梁,包括世界之最——四渡河大桥。

与中国众多大跨度钢拱桥相同,大宁河大桥也是采用的固定悬臂施工方法——在峡谷两侧建造龙门塔架,然后在其上架设临时性的钢索,用以将独立的拱圈构件节段拼装起来,直到在拱桥中部结合为一体。

该桥的建设,从物态和意识上都是对原先位于大宁河口位置的龙门大桥的一个替代,三峡库区水位上升导致了龙门桥的交通地位的让出。当亿万游客乘船沿着长江三峡流域最大的直流溯流而上、穿过龙门大桥时,混凝土拱门就矗立在探险之旅的起点之处。素以“小三峡”而闻名于世,沿着大宁河涉水而上,将会显现出的美景绝不仅仅是中国最大的拱桥之一。甫离巫县,首先进入的是龙门峡,从中国最长的古栈道开始前行,逐渐的将揭开更多的美景胜境。然后,巴雾峡其间怪石林立,奇峰峥嵘,“猴子捞月”、“仙桃峰”等等。继而则是进入最后的滴翠峡,小船就会经过一些著名景点诸如“赤壁摩天”、“飞云洞”等等。












Image by Xinhuanet.



Image by cq.people.com.cn







Cross section of one of the steel arch box ribs.


Image by www.gog.com.cn


Image by www.gog.com.cn






Cross section of the steel and concrete composite beam deck.


Image by www.sfwhw.com

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