Beijing, December 28 (Reporter Qi Zhongxi) With the rapid rotation of the "Wangjing No. 1" shield machine cutter, the Beijing (Beijing) Shen (Yang) high-speed rail Wangjing tunnel began to dig on the 28th, marking the full entry of the entire line of control construction The stage of attack.
According to Zhang Tingjun, Chairman of China Railway 14th Bureau, Wangjing Tunnel is a key control project of Beijing Shenke Special, with a total length of 8,000 meters and a design speed of 250 kilometers per hour. The shield tunnel section of Wangjing Tunnel is 3168 meters long, and two shield machines are used. Each shield machine tunnels a single hole.
The "Wangjing No. 1" shield machine is the key project of the National 863 Program. It has the first independent high-speed rail large-diameter mud-water balance shield machine with complete independent intellectual property rights. It was jointly developed by China Railway Construction 14th Bureau Group and China Railway Construction Heavy Industry Group. Production and assembly commissioning. The excavation has a diameter of 10.87 meters, a total length of 87 meters, a total weight of 1900 tons, and an installed power of 5,300 kilowatts. It integrates functions such as tunnel excavation, lining, exiting and guiding.
The Beijing-Shenyang High-speed Railway Wangjing Tunnel will cross the Airport South Line Expressway and the Beijing Subway Line 15. Shield construction can minimize damage to existing roads, pipe networks, pedestrian bridges, bus stops and other infrastructure, reduce building demolition and interference to the normal life of citizens and communities, and reduce the impact of high-speed rail operations on the surrounding environment. noise pollution.
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