Introduction of Lancang River Bridge in Xishuangbanna

Lancang River Bridge is the throat project of newly-built Dali-Ruili Railway. It straddles the banks of the Lancang River and is located in the western section of Hengduan Mountain, the most complex terrain in China. The total length is 528.438+0 meters and the main span is 342 meters. It is a through reinforced concrete basket arch bridge with rigid skeleton.

The whole bridge * * * uses 85,000 cubic meters of concrete, the main structure * * uses about 1.4 million tons of steel, and * * * uses 1.52 million sets of high-strength bolts. 2016165438+1October 15, newly-built steel pipe arch of Lancang river bridge on Dali-Ruili railway, realizing high-precision closure.

Extended data:

Lancang River Bridge is located in a V-shaped deep ditch on the western edge of Yunnan-Guizhou Plateau. Not only is the wind field in the middle of the bridge different from that on the slopes on both sides, but the wind field at the bridge site is also obviously different from that around the bridge.

Therefore, the meteorological station data in the area near the bridge site can not truly reflect the wind field characteristics in the bridge site area, and the mountainous terrain with changeable terrain can not be classified as any landform in the specification definition.

Therefore, the existing wind characteristic parameter model is not necessarily suitable for the wind-resistant design of Lancang River Bridge. If you blindly apply it, there will be problems.

Therefore, the construction unit must make a very comprehensive measurement of the local climate, wind speed and wind direction in order to master the first-hand data.

In addition to the strong wind in the canyon, construction workers have to face all kinds of geological disasters. Lancang River Gorge belongs to subtropical valley humid climate, with rainy summer and autumn and dry spring and summer. The rainy season is from June to 10, with abundant precipitation and various geological disasters.

However, in such a complex environment, no weather forecast around the bridge construction site can be referenced, which also leads to a very slow construction progress in the first year of bridge construction.

Baidu Baike-Lancang River Bridge