On September 22, on the construction site of Changsha Wanjiali Power Tunnel North Extension Project, accompanied by the roar of the motor, the cutter plate of Shield Machine No. 13 of China Railway Shanhe slowly rotated, which fired the first shot of China Railway Shanhe entering the professional construction plate of Shield Tunnels, which is the first project of China Railway Shanhe entering the construction field.

　　In this construction project, the shield section is 5.1KM long, and the tunnel is circular section with inner diameter of 3.6m and outer diameter of 4.1m, and a total of 3 shields are put into the project, and China Railway Shanhe is responsible for the tunnel boring construction business, including the complete set of equipment such as shield machine, professional construction boring, equipment maintenance and other professional business.

　　Shield machine No. 13 of China Railway Shanhe, which was launched this time, undertook the tunneling work between the No. 1 shield starting shaft and the No. 2 shield receiving shaft, with a total length of 1976.6 meters in the design starting and ending mileage. There are many major risk sources in the interval, such as the pile foundation of the bridge of Xingsha Liaison Line, wind pavilion of Metro Line 5, entrances and exits, and the bed of LiaoDao River, etc. There are many small turning radius of 150 meters, which makes the construction difficult and the performance of the equipment is very demanding.

　　On the site, the shield machine lifting and gantry crane installation and other processes of cross operation, the operating personnel and equipment 24 hours of continuous operation. September Changsha, cloudy and sunny, grab the sunny days, fight the rainy days, by virtue of the professional and reasonable management, fine organization and arrangement, China Railway Shanhe 3 days ahead of the node of the requirements of the Party, ushered in the shield machine in September 22, 9:00 a.m. the smooth start of the shield machine.

　　It is understood that the construction segment is one of the strategic segments of China Railway Shanhe, and the successful start of the Wanjiali North Extension Project marks the official launch of the strategy of the construction segment of China Railway Shanhe. China Railway Shanhe people will continue to maintain high energy and full of enthusiasm, focus on construction intelligence, informationization and intensification, and set up a flag for the company in the professional construction sector.