The construction of the most convenient passage between the southwest region and ASEAN, in the Han Central Enterprises to undertake the construction of the first tunnel through the Guangxi Daying Expressway

Jimu news reporter Li Xiancai

Correspondent Dong Hanbin Xiang Shan

The iron army in Han Construction, which sprinted to the construction goal of the whole year, came good news from the front line. On November 23, the Guangxi Bama-Pingxiang Expressway (Daxin via Longzhou to Pingxiang Section) undertaken by China Yiye, a Han central enterprise, completed an important node--- the right hole of the Guangtun Tunnel was the first to be penetrated, becoming the first tunnel to be penetrated in the bidding section of the project.

It is understood that the total length of the second bid project of the general contracting of China's Yiye Daxin to Pingxiang Expressway Project is 26.96 kilometers, of which the total length of the bridge is 3301 meters / 6, the total length of the tunnel is 3661 meters / 4, and the bridge-tunnel ratio accounts for 25.8% of the total length of the route; 71 channels, 1 service area, covering a total area of 2496.85 acres. Among them, the right line of the Guangtun Tunnel has a total length of 531 meters, the upward slope of the cave entrance is steep, the ditch is developed, the bias pressure is serious, the loess is broken, and the vertical joint is developed, which is a high-risk level tunnel.

During the construction, China Yiye Project Department adopted the two-step division arc excavation method, strictly implemented the principle of "first detection, pipe advance, short advance ruler, weak disturbance, strong support, fast closure, and diligent measurement", rational arrangement, meticulous management, optimization of excavation methods for many times, improvement of the hole out plan, with the mode of "short, tight, fast, diligent", took various effective measures, overcame the construction problems of serious partial pressure, large settlement, large deformation of the initial branch, and hole out of the slope, and successfully completed the breakthrough task after 238 working days of tenacious struggle. At present, other work surfaces of the project are also advancing in an orderly manner.

It is understood that the Bama-Pingxiang Expressway (Daxin via Longzhou to Pingxiang Section) is an important part of the "Vertical 11" in the "Guangxi Expressway Planning Network (2018-2030)" "1 Ring 12 Horizontal 13 Vertical 25 Links", with a total length of 146.129 kilometers, the design speed of the whole line is 100 kilometers per hour, passing through Tiannan, Daxin, Jiangzhou, Longzhou, Pingxiang and other counties, cities (districts), and intersecting with the Nanyou Expressway. After the completion of the project, it will further enhance the level of interconnection between Guangxi and ASEAN countries, and accelerate the construction of an all-round opening pattern of "southbound, northern, eastern and western integration" in Guangxi.

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