This is a continuation of a series of articles that tackles different engineering achievement, from world’s tallest building, longest bridge, biggest building, and the likes. Now let’s talk about the world’s longest bridge.
With the advancement of technology and machinery, building something big and long now seems to be less difficult. With this, engineers and architects were able to build majestic infrastructures around the globe. And one kind of that majestic infrastructure is the Danyang Kunshan Grand Bridge in China.
According to Wikipedia, a bridge is a structure built to span physical obstacles such as a body of water, valley, or road, for the purpose of providing passage over the obstacle. There are many different designs that all serve unique purposes and apply to different situations. Designs of bridges vary depending on the function of the bridge, the nature of the terrain where the bridge is constructed and anchored, the material used to make it, and the funds available to build it.
There are several type of bridge, this our:
- Beam Bridge
- Truss Bridge
- Cantilever Bridge
- Arch Bridge
- Tied Arch Bridge
- Suspension Bridge
- Cable-stayed Bridge
- Double-Decked Bridge
Danyang Kunshan Grand Bridge falls into viaduct category, which is composed of several small spans for crossing a valley or a gorge. The bridge is 164, 800 meters (164.8 km) long. It has a main span of 80 meters (260 ft) and it runs through land and over water. Actually the world’s longest bridge over water the Qingdao Haiwan Road Bridge is just a part of Danyang Kunshan Grand Bridge. Qiandao Haiwan Bridge (Jiaozhou Bay Bridge) is 26.7 km long.
Danyang Kunshan Grand Bridge is located on the rail line between Shanghai and Nanjing. Its construction started on 2006 and was completed on 2010 and the official opening was on 2011, the construction employed 10, 000 workers and costs around $8.5 billion. The main purpose of the bridge is to solve the railway traffic on the area.
The high volume of workers is partially caused by the 450, 000 tons of steel structure used in the construction. Chinese officials stated that, the Danyang Kunshan Grand Bridge can withstand strong typhoons, magnitude 8 earthquakes and an impact that is equal to a 300, 000 ton vessel.
With its massive length, Danyang Kunshan Grand Bridge is truly an Engineering milestone.