September twenty sixth，Large-diameter long-distance pipe jacking machine for ultra-complex formation jointly built by Railway Construction Heavy Industry and the Fifth Hydropower Bureau“Jiangyuan Jiaoliu”Complete single jacking of 946m，The Jiaoliu River Diversion Tunnel of the Water Diversion Project from Chuoyang to Liaoning was successfully completed.。

This project has created a super-complex engineering geology of pipe jacking in China.、Record of Longest Distance Jacking in High Water Pressure Formation，It is also the largest diameter pipe jacking machine in China after China Railway Construction Heavy Industry.“Iron bugle”After that, he made another success.，It marks the breakthrough success of the pipe jacking machine in the construction of tunnels under complex working conditions in large-scale water diversion projects in China.。

      The project uses an outer diameter of 4..3 meters of pipe，Single crossing distance 946m，Maximum buried depth: 26m，Formation water content is extremely rich.，Water pressure of the whole construction process is more than 2 bar。The whole interval rock formation、Mud gravel and clay strata frequently alternate, and the strata are soft at the top and hard at the bottom.。Construction under the stratum，The pipe jacking machine is like“In the waters of the reef.”Stealth，How to be safe and efficient、The success of one-time jacking crossing is a difficult problem in front of construction and equipment。

In view of the engineering characteristics and construction difficulties of the project，“Jiangyuan Jiaoliu”The whole machine is designed with high reliability.，Hard rock heavy duty main bearings、High power density main drive、Intelligent monitoring and control system，It is also equipped with an independent cabin.，Capable of coping with various complex working conditions。In the course of construction，Construction personnel use independent cabin for many times，Carry out maintenance in the unstable formation with pressure、Tool change operation。The powerful configuration and high stability of the equipment provide a guarantee for the smooth completion of the project.，And achieved a maximum daily footage of 15 meters.、The maximum monthly footage is 219 meters.。