Recently, Guizhou Longli River Bridge (original Duohua Bridge), the world's No. 1 cable-stayed bridge with alpine canyon landscape, jointly built by China Railway Nine Bridges, a subsidiary of China Railway Industry Co., Ltd., was successfully closed.

The bridge is located in Longli County, Qiannan Buyi and Miao Autonomous Prefecture, Guizhou Province. It spans the Duohua Grand Canyon with a total length of 1260 meters. 30 meters wide.

The main bridge and pylons are equipped with sightseeing tour glass trails, sightseeing elevators and aerial viewing platforms and other facilities. It integrates transportation, tourism, leisure and entertainment, and provides a 360° panoramic view of the scenery of Duohua Grand Canyon and Longli Prairie. China Railway No. 9 Bridge mainly undertakes the construction and safety tasks of the whole bridge with a total of about 13,200 tons of steel beams.

Because the bridge is located in the karst landform area, the karst troughs and troughs are strongly developed, the construction is unpredictable, and the bridge is located in the mountains and valleys, and the climate difference is large, and the construction is difficult. In the process of erecting the steel girder, aiming at the bridge form characteristics of the ultra-high main tower cable-stayed bridge, China Railway Nine Bridges developed the "mountainous area ultra-high main tower cable-stayed bridge installation technology", and innovated a set of wall-mounted cranes, transportation Installation method of cable-stayed bridge with super high main tower in mountainous area with beam trolley and beam crane as the core.

The Longli River Bridge is the world's first alpine canyon landscape bridge with a roadway and a glass walkway sharing the same deck. After the bridge is completed, it will become the only fast passage connecting the grassland area with the outside world, and the driving time from Guiyang to Longli Prairie will be shortened from 1.5 hours to about 30 minutes.Editor/Ma Xue