TBM of Railway Construction Heavy Industry Liaison Channel Helps Key Tunnel Projects to Be Accurately Connected

Recently，As the main machine of the Roadheader enters the receiving sleeve accurately,，The first connecting passage of Guangzhou Haizhuwan Tunnel Project invested by Guangzhou Trading and Investment Group has achieved high-precision connection.。This is also China Railway Construction Heavy Industries.、China Railway 14th Bureau、The first domestic super-large diameter shield tunnel connecting channel Roadheader jointly built by Xindi Energy is the first project show.，Assist mechanized construction of large-diameter highway tunnel“The last mile”。

The tunnel runs through

It is understood that，Guangzhou Haizhuwan Tunnel Project is the first extra-large diameter shield tunnel under construction in Guangzhou area.，Be called“The first shield of Guangzhou”，The total length of the route is 4.35 kilometers，The shield section is 2102 meters long.，Shield section crossing through fracture zone、Argillaceous siltstone formation，Underpass the Pearl River Channel，There are 6 communication channels in total.，Channel length 14.8 meters~18.1 meter。Its main tunnel segments areC60 high strength segment，The buried depth of the connecting passage is more than 45 meters.，And has a large oblique angle with that main tunnel.，The TBM of the connecting passage shall be used for synchronous cross construction with the shield of the main tunnel，The working conditions are extremely complex，All of them are the first construction challenges encountered by domestic mechanical liaison channel equipment.。 

Equipment site

In order to cope with the complex working condition，The equipment applies the rapid breaking of oblique segments.、Synchronous construction layout、High pressure seal、Pose quick adjustment、Many key core technologies such as high-precision guidance and deviation correction。Achieve the highest shift footage of 2 ring pipe sections，In less than three hours.，FinishCOblique breaking of 60 high-strength segment，Set a new record for cutting the main line tunnel segment。

The sleeve receives

It is reported that，The TBM has been successfully applied in 6-meter-class small-diameter metro tunnels and 15-meter-class large-diameter highway tunnel。Relying on key projects，The equipment will be demonstrated in the intercity railway tunnel with a medium diameter of 9 meters.，The realization is small、Medium、Full coverage of large and other application scenarios，Continue to contribute to the construction of major national projects。

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