Detail :: Data Jembatan

Jembatan Nanlidu

Panjang220,00 m
Bentang Terpanjang220,00 m
Kondisi UmumAktif
Jenis JembatanPelengkung Baja
Tanggal Selesai2002
Tanggal Peresmian2002
Latitude (GPS)30.4524300000000000
Longitude (GPS)109.7229449999999800

Twisting through the rugged limestone mountains of China’s Hubei province, route 318 was once part of the only east-west road south of the 3 Gorges region of the Yangtze River. Connecting Enshi with the Yangtze River city of Wanxian, part of the 318 was bypassed in 2009 when the last segment of the G50 West Hurong expressway opened between Enshi and Zhongxian. A significant improvement to the original 2-lane road came in 2002 in the form of the beautiful Nanlidu bridge. Leaping across the river in a single bound of 722 feet (220 meters), the brilliant red span frames a spectacular mountain backdrop.

Another one of China’s unique concrete filled steel tube bridges, the Nanlidu bridge was built like several other high and long span steel arch bridges 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. Once the main arch is closed at the crown, concrete is pumped into the hollow tubes of the two steel arch ribs, filling them upward from the foundations to the crown. First used by the Chinese in 1990, engineers have refined and improved the technique and now use it on the majority of their steel arch bridges. Depending on the length of the span and the width of the bridge, different styles of tubing are used. For Nanlidu, they adopted an array of single tubes spaced apart from each other. Other configurations include dumbbells with two tubes closely connected, a mix of dumbbells and single tubes such as was done on the Beipanjiang River Railway bridge or a tight cluster of tubes known as “multiple contiguous”. Once hardened, the concrete solidifies and stiffens the arch, improving the compressive strength of the entire structure.

In 2009 the Nanlidu bridge lost 140 feet (43 meters) of its height from a reservoir that began to form under it from the construction of a downstream dam.

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