Recently，New Slurry Balance Shield Machine Jointly Built by China Railway Construction Heavy Industry and China Railway 12th Bureau“Yuehaihuanbei No.8”Offline in Changsha, Hunan。The equipment is 135 meters long.，Excavation diameter 6.28 meters，It is the first off-line shield machine of Guangdong Water Resources Allocation Project around Beibu Gulf.，To be applied to the projectDTunnel construction of Lot 1。

Speech by Li Daimao, Deputy General Manager of Guangdong Yuehai Yuexi Water Supply Co., Ltd.

Speech by Yao Yongqin, Deputy Chief Engineer of China Railway 12th Bureau

Deputy Secretary of the Party Committee of Railway Construction Heavy Industry、Director、Vice General Manager He Yongjun delivered a speech.

Water Resources Allocation Project of Guangdong in the Beibu Gulf RimDTotal length of tunnel in Bid 1:10.19 kilometers，Among“Yuehaihuanbei No.8”The shield machine needs to complete up to 3908.3 meters of tunneling task。The main crossing geology of this section is complete.、Strong、Moderately weathered metasandstone，The rest passes through the fault breccia，Limestone formation，A total of 25 developed faults are crossed.。Long distance traversing hard rock, uneven soft and hard strata and dense water-rich fault zone，It is easy to cause construction risks such as instability of shield machine and blockage of warehouse.，Therefore, the requirements for the shield machine attitude control ability and slag tapping performance are extremely high.。

In view of the above engineering difficulties，The R & D team of China Railway Construction Heavy Industry is“Yuehaihuanbei No.8”The shield machine is equipped with many advanced innovative technologies and many independent core key technologies.，Especially the application.“Multi-channel+Multi-loop”Design of new slag tapping mode，It can effectively solve the blockage caused by the stagnation of large particles such as fracture zones at the bottom of the excavation bin.、The problem of pipe blockage，Effectively guarantee the rapidity and safety of shield tunneling under complex geological conditions。

It is reported that，The water resources allocation project around the Beibu Gulf is the largest investment in Guangdong so far.、Longest water transmission line、Construction conditions are the most complicated.、The most influential major water conservancy project。After the completion of the project，It will systematically solve the problem of water shortage in western Guangdong.，Greatly improve regional water supply capacity、Significantly improve the regional water ecological environment，To enhance the comprehensive carrying capacity of the west wing of the coastal economic belt、Speed up construction“One core, one belt and one area”The regional development pattern is of great significance.。

The guests took a group photo in front of the offline equipment.

Coming up，“Yuehaihuanbei No.8”Shield machine will be sent to water resources allocation project around Beibu GulfDConstruction site of Lot 1，Start tunneling after assembly and commissioning。Railway Construction Heavy Industry will continue to give full play to its professional and technical advantages.，Sincere service with rich experience，High quality for the project、Provide strong guarantee for safe tunneling。