Recently，Super-large diameter slurry balance shield machine jointly built by China Railway Construction Heavy Industry and China Railway 22 Bureau“The name of a powerful country”Smooth start，It marks the largest diameter shield tunnel constructed by Shenzhen Metro Group.——Guangguan-Shenzhen Intercity Qianhuang Project has formally entered the stage of shield tunneling construction。

“The name of a powerful country”Smooth start

“The name of a powerful country”Excavation diameter 13.27 meters，The total length is 129 meters，Used for Guangguan-Shenzhen Intercity Qianhuangkai Section 1#Open cut——Construction of Huanggang Port Station Project。Length of shield section in this section: 3511.566 meters，The vertical section of the section line is doubleVShaped slope，Maximum longitudinal gradient 27‰，The minimum curve radius is 1300 meters.，The maximum buried depth of the tunnel bottom is 46 meters.，Maximum pressure approx. 4.6Bar。The tunnel passes through the upper soft and lower hard strata and the strong permeable strata for a long distance.，Locally, there are broken and highly weathered granite strata.，The shallowest overburden is 10.7 meters，There are many important buildings and structures along the line，High requirements for surface settlement control，The construction is extremely difficult。

In view of the above key and difficult points of the project，The R & D team of China Railway Construction Heavy Industry is“The name of a powerful country”A series of targeted designs were carried out.，In order to deal with the difficulties encountered in the long-distance crossing of the upper soft and lower hard strata in this project.，At the same time, it carries a number of intelligentization for the equipment.、Humanized innovative design，Provide strong guarantee for safe tunnel construction。

“The name of a powerful country”The cutter head goes down the well

The section from Qianhai to Huanggang Port of Guangguan-Shenzhen Intercity Railway passes through Qianhai Cooperation Zone of Shenzhen、Nanshan district、Futian District，Total length of main line: 21.167 kilometers，After the completion of the line, it will improve the inter-city rail backbone network in Shenzhen Binhai area.，Support the Qianhai Free Trade Zone、The rapid construction of key development areas such as Dongguan Binhai New Town is of great significance.。“The name of a powerful country”Since February 2023, the first piece has been assembled in the well.，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 laid a solid foundation for the smooth start of the shield machine.。