Recently，China Railway Construction Heavy Industry Co., Ltd. and China Railway 18th Bureau Co., Ltd. jointly built the first new open tunnel boring machine in China.（TBM）“The North River”，Help Guangzhou Beijiang Water Diversion Key and Difficult Project No.4 Tunnel to Achieve Full Completion。

“The North River”During the construction, the highest single-day footage of 47..07 meters，Maximum monthly footage 701.68 meters，The average monthly footage is 460 meters.，It has laid a solid foundation for the whole line.。

Site of No.4 Tunnel of Guangzhou Beijiang Water Diversion Project

It is understood that，Treatment of Soft Foundation in Construction of Guangzhou Beijiang Water Diversion Project、Karst cave、Super hard mountain tunneling、Mountain fracture zone、Railway、River、Highway and other complex and changeable construction environment。The No.4 tunnel spans Guangzhou and Qingyuan.，It is the key difficulty and key node project of the whole line of the project.，Total length 11.Four kilometers，The construction length accounts for 72% of the total project length.6%，Have“Hard rock formation、Large burial depth、Long distance、High pressure”And so on。

  

No.4 Tunnel Outlet of Guangzhou Beijiang Water Diversion Project

In order to cope with complex geological conditions，China Railway Construction Heavy Industry and China Railway 18th Bureau“The North River”It carries a number of industry-leading core technologies.。Ensure that the excavation diameter is 4.53 meters，With a total length of about 295 meters“The North River”，It has not only become the first new open type in ChinaTBM，It is also the smallest tunneling section in South China.、Maximum system integration、The most customizedTBM。

  

“The North River”TBMFactory acceptance

It is reported that，After the completion of the Beijiang Water Diversion Project，It will meet the medium and long-term water supply needs of more than two million residents in northern Guangzhou.，Optimize the allocation of regional water resources。At the same time，“The North River”Successful Application in Beijiang Water Diversion Project，It further verifies the reliability of the products of the Railway Construction Heavy Industry.，It promotes the rapid development of mechanized construction of water diversion projects.。