August 19，Reporters from China Railway High-tech Industry Co., Ltd.（Hereinafter referred to as“China Railway Industry”）Understand that，It is the world's first alpine canyon landscape cable-stayed bridge built by China Railway Ninth Bridge.——Longli River Bridge in Guizhou（The original Duohua Bridge）Official closure。The bridge will become the only fast way to connect the grassland area with the outside world.，As a result, the travel time from Guiyang to Longli Prairie is reduced from the original 1.5 hours reduced to about 30 minutes。

Overall aerial photos of Longli River Bridge。Interviewees provide pictures

Longli River Bridge is located in Longli County, Qiannan Buyi and Miao Autonomous Prefecture, Guizhou Province.，Across the Grand Canyon of Flowers，The total length is 1260 meters。The main bridge is a steel-concrete composite girder cable-stayed bridge with double towers and double cable planes with a main span of 528 meters.，The bridge is 30 meters wide.，The top of the main tower is about 400 meters from the bottom of the canyon.，The bridge deck is about 280 meters from the bottom of the canyon.，It is the world's first alpine canyon landscape cable-stayed bridge currently under construction.，It is also a traffic control project connecting Longxi Inland Open Economic Development Pilot Area and Longli Grassland Area in Central Guizhou.。

“After the completion of the bridge，It will reduce the space-time distance between grassland and the outside world.，Greatly improve the road network structure of Longxi Economic Belt，It has become a new scenic spot in Longli County.，Eventually, a grassland will be formed.、 Great bridge 、 Canyon 、Pastoral、Hot spring hotels and other integrated tourist routes.，Promote the sustainable development of regional economy。”The project responsible person said.。China Railway No.9 Bridge mainly undertakes the whole bridge of Longli River Bridge, totaling about 1.320,000 tons of steel beam fabrication and installation tasks。

Aerial photos taken during the hoisting of steel girders of the bridge。Interviewees provide pictures

Because the Longli River Bridge is located in the karst landform area.，Strong development of karst ditch and groove，Large unpredictability of construction，It is located in high mountains and valleys.，The climate varies greatly，The construction is difficult.。In the process of erecting the steel girder of the Ninth Bridge of China Railway，According to the characteristics of the bridge form of the super-high main tower cable-stayed bridge，Developed“Installation Technology of Super High Main Tower Cable-stayed Bridge in Mountainous Area”，Innovated a set of wall-attached crane、Beam transport trolley、Installation Method of Super High Main Tower Cable-stayed Bridge in Mountainous Area with Girder Erection Crane as the Core。