Today（10 days）Morning，The longest tunnel in the Fujian section of the Longlong Railway connecting Longyan in Fujian to Longchuan in Guangdong——Successful completion of Shuangjishan Tunnel，Shuangjishan Tunnel is one of the key control projects of Longlong Railway.，As of today, all 23 tunnels along the Fujian section of the Longlong Railway have been successfully completed.。

Shuangjishan Tunnel of Longlong Railway is located in Shanghang County, Longyan City, Fujian Province.，Total length 7668.85 meters，The design speed is 250 kilometers per hour，It is a single-hole double-track tunnel.。

The geological conditions of the tunnel are complex.，Through 9 fault fracture zones，Abundant underground and surface water，Daily water inflow of nearly 50,000 cubic meters，And the tunnel underpasses the West-East Gas Pipeline andGNational Highway 358，High requirements for blasting control，Especially when it goes down through the West-East Gas Pipeline.，Only mechanical excavation can be used.，It brings great difficulties to tunnel construction.。

Facing complicated geological conditions，China Railway Nanchang Bureau Group Co., Ltd. and Fujian Railway Construction Headquarters，Organize the participating units to scientifically adjust the construction plan，Reverse the schedule，Large-scale machinery supporting construction is adopted.，By using a wet spray robot、Self-propelled hydraulic invert trestle、Automatic cloth-hanging trolley、Second lining trolley, intelligent distribution system and other equipment，Mechanization of tunnel construction、Specialization、Intelligent。At the same time, new materials such as waterproof drainage boards are used in the tunnel.，This process is the first application in China.，Ensure the smooth progress of the project。

Longlong Railway is a national railway.《Medium and long term railway network planning》An important part of Hangzhou-Guangzhou high-speed railway，From Xinluo District, Longyan City, Fujian Province in the east，It passes through Shanghang County of the city、Wuping County enters Guangdong Province，Finally to Longchuan County，The main line is 265 kilometers long.，It is a double-track high-speed railway.，It is expected to be ready for operation in December 2023.。After the completion and opening of the Longlong Railway，It will end the history of no railway in Wuping County, Fujian Province.；It will further promote the regional economic development of Fujian and Guangdong provinces.，Improve people's travel along the line。（Station reporter Wu Yanmin）