It takes only 2.5 hours from Beijing to Shenyang after the whole Beijing Shenyang high speed railway tunnel is successfully opened to traffic

Xinhua Beijing, Dec. 13 (reporter Han pan) on Dec. 12, the last tunnel of Beijing Shenyang high speed railway, lihuading tunnel, Miyun District, Beijing, was successfully completed. According to

, the tunnel is the longest mileage and the most difficult to construct in Beijing Hebei section of Beijing Shenyang high speed railway. Its connection has laid a solid foundation for the operation of the Beijing Shenyang high speed railway.

Beijing Shenyang high speed railway starts from Beijing Xinghuo station, passes through Shunyi District, Huairou District and Miyun District of Beijing, Chengde city of Hebei Province, Chaoyang City, Fuxin city and Shenyang City of Liaoning Province, and ends at Shenyang station, with a total length of 698.294 kilometers, which is an important part of the "eight vertical and eight horizontal" high speed railway network of China, namely, the Beijing Harbin Hong Kong Macao channel. According to the relevant person in charge of the company, the main line of Beijing Shenyang high speed railway is 290 km long, including 98.4 km in Beijing and 191.6 km in Hebei, with a design speed of 350 km / h, including 54 tunnels, with a total length of 152.8 km, of which the longest lihuading tunnel is 12.243 km long, located in Miyun District of Beijing, across Beijing and Hebei. It is The single tunnel and double track tunnel, running through the mountains and the great wall of Ming Dynasty, is a key and difficult control project of the whole line with complex geological structure. It is constructed by China Railway 19th Bureau and China Railway 22nd Bureau. In order to protect the great wall of Ming Dynasty, the company adopts the method of controlled blasting and single arm roadheader milling. It can effectively overcome the adverse effects of complex geological environment, and successfully solve the problems of long-distance ventilation, return slope drainage, etc. the construction progress is smooth and the safety quality is controllable.

according to the relevant person in charge of Railway Engineering Co., Ltd. of China Railway 22nd bureau group, the use of wet spraying manipulator in tunnel engineering can solve the problems of surrounding rock difference and shallow buried bias pressure, effectively reduce the number of workers and material loss in the working face, reduce the cost and improve the efficiency, greatly reduce the dust concentration in the tunnel, and improve the construction environment, Ensure the health and construction quality of operators. In order to solve the problem of channel installation accuracy, the project innovation team developed the embedded channel automatic jacking system, which reduced the channel scrap rate from 5% to about 1.5%, improving the construction quality and efficiency.

it is understood that the Chengde Shenyang section of Beijing Shenyang high speed railway has been officially opened for operation on December 29, 2018. The Beijing Chengde section is under construction. After the completion and opening of the Beijing Shenyang high speed railway, the operation time from Beijing to Shenyang will be shortened to 2.5 hours.