January 4，Super-large diameter slurry balance shield machine jointly built by China Railway Construction Heavy Industry and China Railway 14th Bureau“The trailblazer”Successfully offline in Changsha。“The trailblazer”Excavation diameter 15.07 meters，It will be used in Guangzhou Haizhuwan Tunnel Project.，The project is the largest diameter shield tunnel under construction in Guangzhou.。

Chairman of Guangzhou expressway Co., Ltd.、General Manager He Qinghua announced that the shield machine was offline.

Speech by Wang Haijun, General Manager of Guangzhou Haizhu Bay Construction Co., Ltd.

  

Speech by Shi Qingtao, Secretary of the Party Committee of China Railway Shisiju Shield Company

  

Deputy Secretary of the Party Committee of Railway Construction Heavy Industry、Director、He Yongjun, chairman of the trade union, delivered a speech.

  

Liu Shaobao, Technical Director of Railway Construction Heavy Industry, presided over the offline ceremony.

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.。

  

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.，Equipped with telescopic main drive、Visual system of excavation bin、Automatic measurement monitoring、Many innovative technologies such as online perception of tool status，O as to ensure the safety of the shield machine.、Fast tunneling。

The completion of Haizhuwan Tunnel Project will fill the gap of the lack of fast passage between the central city of Guangzhou and Guangzhou South Railway Station.，Enhance the collection and distribution capacity of Guangzhou South Railway Station，Further release its core portal hub function，It is of great significance to promote the construction of Guangzhou's central city and the interconnection between Guangdong, Hong Kong and Macao.。