Niulanjiang Bridge Duxiang

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Niulanjiang Bridge Duxiang
都香高速牛栏江特大桥
Jinyang, Sichuan, China
(361) feet high / (110) meters meters high
584 foot span / 178 meter span
2022

Niulanjiang Bridge Duxiang.jpg


Located in a remote border region of Sichuan and Yunnan Provinces, the Niulanjiang Bridge Duxiang is a large beam crossing partially submerged within a tributary of the deep reservoir flooding the great Jinsha River just 1 kilometer to the west. The 178 meter main span is supported on piers as tall as 63 meters.

Also one kilometer to the west of the Duxiang Bridge is the single tower Jinyang Jinshajiang cable stayed bridge. Both spans will be the highlight of a new G7611 expressway between Xichang, Sichuan and Zhaotong, Yunnan. The 205 kilometer route will have 86.6 kilometers of bridges and 55.8 kilometers of tunnels making up 72.4% of the entire route.


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Niulanjiang Bridge Duxiang satellite image.


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Niulanjiang Bridge Duxiang location map.


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The planning of the G7611 Zhaotong Expressway gives a great insight into the design process the Chinese engineers must undertake while planning an extremely mountainous expressway route with more then 72% of the length in tunnels or on bridges.

The difficulty in finding the best route for the G7611 was magnified by the terrain's continuous descent from an elevation of 2,000 meters in Zhaotong to 500 meters at the Jinsha River. Six routes were studied before they chose the red route. Several of the routes include extensive spiral switchbacks to ease the steepness of the grade.


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Regional map showing planned expressways including the Xichang to Zhaotong expressway in red.