China News Service, Guiyang, September 28 (Yue Wang) On the 28th, with the 107-ton steel main girder steadily falling in the predetermined position, the first long-span steel-concrete composite girder suspension bridge in mountainous areas in China, the Fenglin Bridge, was closed.
The closure of the bridge not only lays a solid foundation for the Xingyi Ring Expressway in the Buyi and Miao Autonomous Prefecture of Guizhou Province to achieve the goal of opening to traffic at the end of 2020, but also adds a rookie to the "World Bridge Museum"-Guizhou.
The construction of the Fenglin Super Bridge started in March 2018 and is a full-line controlled project.
The bridge crosses the Maling River Gorge and is adjacent to Wanfenglin Scenic Area of Xingyi City. The distance from the bridge surface to the valley bottom is 364.2 meters. It is divided into Yilong Bank and Xingyi Bank by the gorge. The left bridge is 1164 meters long and the right bridge is 1130 meters long. .
Construction of the bridge started in March 2018 and is scheduled to be opened to traffic by the end of 2020.
According to Wu Bing, the general construction section of the Xingyi Ring Expressway Fenglin Bridge Project, in order to protect the original landform and vegetation of the Maling River Gorge scenic spot, the construction of the Fenglin Bridge has always been based on "green and beautiful construction, science and technology" as the first requirement. Through the application of technology such as the slag removal technology of the truck crane with the gantry crane, the slag removal technology of the steep slope chute of the canyon, the super fluid self-compacting concrete pouring technology of the large-diameter deep bored pile foundation, etc., the topography of the bridge site is effectively protected.
In the construction of Fenglin Bridge, the use of assembled prefabricated hoisting technology for the middle beam of the main tower of the bridge is the first case in China, which solves the problem of accurate positioning of the lifting system, the impact of the lifting process on the main tower, and the wet joint concrete after lifting. Technical difficulties in preventing micro-cracking and control.
The picture shows the closing scene of the Fenglin Bridge.
Photo by Liu Yelin
The Xingyi Ring Expressway in Qianxinan Prefecture is one of the densely planned projects of the expressway network in Guizhou Province. It is constructed in accordance with the two-way four-lane expressway standard with a design speed of 80 kilometers per hour.
After the completion of the Fenglin Bridge to traffic, it will be of great significance to expand the development space of the city, drive the development of industries along the route, build a more complete road transportation system, and promote the development of intra-city development.
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