(ECNS) -- The G4216 Yibin-Panzhihua expressway, located in a mountainous area of southwest China’s Sichuan, is under construction and expected to open in 2025.
The expressway, along the Jinsha River, is an important passage for rural revitalization in Wumeng Mountain and Liangshan Yi Autonomous Prefecture.
Due to the unfavorable terrain, the Jinsha River basin is the last area in China where people were lifted out of poverty. This area has huge mountains and deep valleys, making road construction very difficult, especially expressways.
The expressway is currently the most challenging mountain project in China. Constructors said roads will span the cliffs on both sides of Jinsha River.
To connect Ningnan County in Liangshan Prefecture with the trunk of the expressway, the Heishuihe Bridge will be built with a main span of 550 meters at an altitude of 200 meters
Below the bridge is the largest and most active fault zone in the lower reaches of Jinsha River.
Geological activities often occur along the Jinsha River in Butuo County, deep within the Daliangshan Mountain region. Therefore, experts suggested the tunnels to be built in dangerous areas in Butuo in order to avoid risks, but it means that the entrance and exit of the section here have to be transferred elsewhere, which would be unfavorable for improving local transportation or boosting economic development.
In order to retain the entrance and exit, builders finally found a narrow strip with relatively gentle mountains in Madiwan Village, where a dangerous landslide occurred on the west side.
Builders boldly put forward a project idea of removing the landslide. After two years of work starting November 2020, the 160-meter-high landslide with a volume of about 3 million cubic meters was removed a dozen of miles away.
After the opening of the expressway, the travel time between Yibin to Panzhihua will be shortened from 10 hours to six hours and it will boost economic development of local counties along the route.
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