Technological innovation promotes the development of highway construction in mountain areas

“Guizhou’s special landforms determine the status and role of bridges in Guizhou’s economic and social development.” A few days ago, Deng Wenzhong, an academician of the American Academy of Engineering and a foreign academician of the Chinese Academy of Engineering, said that when he inspected the Baling River Bridge, he said that Guizhou has adopted local conditions and built Balings in the mountains. The river bridge, using technological innovation to promote the development of mountain highway bridges across the development.

The Balinghe Bridge is a single-span steel-truss reinforced beam suspension bridge with a span of 1088 meters. The bridge is 2,237 meters in length and 370 meters from the bridge surface to the river surface. It is the highest-technical bridge ever built in Guizhou, and a number of construction techniques in the construction of the bridge. And technology has reached the leading level both at home and abroad. It is a microcosm of Guizhou's reliance on technological innovation in the past decade to provide technical support and guarantee for the sound and rapid development of transportation construction.

Located in the eastern part of the Yunnan-Guizhou Plateau, Guizhou has high mountains and valleys, ravines, and 97% of mountains and hills. It is the only province in the country with no plains. The conditions for highway construction are especially difficult. For a long time, the weak transportation infrastructure has constrained the economic and social development in Guizhou.

Under the conditions that the roads are getting harder and harder and the bridges being built and more complicated, the demand for road building in Guizhou Province for the innovation of mountain bridge construction technology is particularly urgent. In 2004, Guizhou Province built the first cable-stayed bridge, the Hongfeng Lake Bridge, and opened a new starting point for the special structural bridge in the province. Since then, Guizhou has built Balinghe Bridge, Malinghe Bridge and other special structural bridges. Nowadays, a new technology bridge has been built and a large span bridge has been erected proudly. There are thousands of “plateau rainbows” shaped by traffic builders.

Guizhou's bridge construction continues to break through and innovate in its span and structural form. In the cable-stayed bridge, the Bipan-Dujiang Expressway Beipan River Bridge under construction uses the main span 720m steel truss girder cable-stayed bridge, which is the largest span of the world's existing bridges. In terms of suspension bridges, the proposed Qingshuihe Bridge on the Guiyang-Pan'an Expressway will have a main span of 1,130 meters and will break through the main span of the existing suspension bridge in Guizhou. Continuous rigid arch bridges and arch bridges are more large-span bridge-type structures used in Guizhou. The Beipanjiang Bridge, which is under construction from Liupanshui to Panxian Expressway, is a 270-meter fast-span continuous rigid-framed bridge. The Bijie-Weining Highway Hezhang Bridge under construction is a continuous rigid-framed bridge with a pier height of 195 meters.

Luo Qiang, deputy director of the Guizhou Provincial Department of Transportation, said that Guizhou has made great progress in bridge construction technology, such as the use of deck cranes in the erection of steel truss girders; the use of rotary construction technology in the construction of arch bridges, development of climbing steel Hanging basket construction technology; in the construction of high piers, step-by-step sliding mode technology and comprehensive monitoring technology are adopted. In the use of materials, machine-made sand high-strength concrete has been widely used, large volume pouring of machine-made sand concrete, high-lift pumping technology has made breakthroughs, and development of special mechanisms such as self-compacting, anti-disturbing and anti-dispersion sand concrete has expanded the use of machine-made sand. The range of applications for local materials represented.

At present, Guizhou is trying to open up a large-scale highway to the outside, and the traffic infrastructure that is dominated by highways is changing with each passing day. The province is currently constructing 3,142 kilometers of expressways, and nearly 1,000 kilometers are currently carrying out preliminary work. It is expected that by 2015, the mileage of highways throughout the province will reach more than 5,100 kilometers and the county-to-county highway will be realized.