Railway Construction Heavy Industry Shield Machine Helps the Largest Diameter Sewage River-crossing Shield Tunnel Under Construction in China

Recently，Jointly built by China Railway Construction Heavy Industry and China Railway 14th Bureau“The Shin-Yue”The Shield Machine slowly arrived at the Jiangnan receiving well.，Help Nanjing Jiangxinzhou Sewage Collection System Second Channel Construction Project（Cross the Jiajiang section）Smooth penetration。

Through the ceremony

It is understood that，“The Shin-Yue”Excavation diameter of Shield Machine 9.15 meters，The total length is 117 meters，The total weight is about 1400 tons。Nanjing Jiangxinzhou Sewage Collection System Secondary Channel Project with Equipment Application，The shield tunnel is 693 meters long.，Outer diameter of segment 8.8 meters，Maximum burial depth 23.4 meters，Maximum water pressure 0.34 MPa，Location“Jiajiang Drinking Water Source Protection Zone”，It is necessary to cross the Jiajiang River and the levee.、Abutment、Municipal pipe network, etc，The minimum overburden thickness of the river bottom is only 10.23 meters，And is limit by that size of the originating well configuration，The Shield Machine must be launched separately.，There are many construction processes、Difficult。

The tunnel runs through the site

It is reported that，At present, shield tunnel in China，It is basically composed of reinforced concrete segments and bolts.，The segments are assembled and connected by different types of bolts.。For the first time, the shield tunnel of this project has adopted“The invention relates to a novel spigot and socket segment”，That is to say, the longitudinal joint of the segment adopts the bolt type connector.，Hoop joints with plug-in connectors，The assembly precision of that segment assembly machine is extremely high。

For shallow overburden and soft stratum、Construction of new socket and spigot segments, etc.，The R & D team of China Railway Construction Heavy Industry is“The Shin-Yue”Carry out a series of targeted design，To cope with the high settlement requirements of the project.，Precise requirements for segment assembly and construction difficulties，Ensure the smooth connection of the project。

“The Shin-Yue”Factory acceptance site of shield machine

From March 1, 2023，“The Shin-Yue”Since the shield machine was launched as a whole，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 penetration of the tunnel project.。

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