May 14，Super-large diameter slurry balance shield machine jointly built by China Railway Construction Heavy Industry and China Railway 14th Bureau“The trailblazer”Smooth start，It marks the first super-large diameter municipal shield tunnel in the Pearl River Basin.——Guangzhou Haizhuwan Tunnel Project Enters Comprehensive Construction Stage。

“The trailblazer”Departure site

 The total length of Guangzhou Haizhuwan Tunnel Project is 4.35 kilometers，The shield section is 2077 meters long.，Crossing through the fracture zone twice、Pearl River Channel，Long distance traversing mudstone、Argillaceous siltstone formation，And underpasses dense buildings.、Pile group，Complicated construction environment、There are many control factors in tunneling.、Difficult construction and so on.，The requirements for shield machine are extremely high.。

“The trailblazer”The cutter head goes down the well

In view of the above key and difficult points of the project，The R & D team of China Railway Construction Heavy Industry is“The trailblazer”A series of targeted designs were carried out.，O as to ensure the safety of the shield machine.、Fast tunneling。

“The trailblazer”Excavation diameter of shield machine 15.07 meters，The total length is 130 meters，The total weight is about 4300 tons，Since February 20, 2023, the first piece has been assembled in the well.，Complete all processes from shield machine assembly to launching in less than 3 months。Period，Research and development of China Railway Construction Heavy Industry、The service team always sticks to their posts.、Overcome difficulties，Timely response to customer needs，It provides a solid guarantee for the smooth start of the shield machine.。

After the completion of the project，The downtown area of Guangzhou can be directly connected to Guangzhou South Railway Station.，It will effectively alleviate the long-term detour.、Congestion problem，It is of great significance to promote the construction of Guangzhou's national central city and the interconnection between Guangdong, Hong Kong and Macao.。