November twenty second，Manufactured by China Railway Equipment，It is applied to the construction of Guifengshan No.1 Shield Tunnel in Jiangji Section of Zhuhai-Zhaoqing High-speed Railway.，Extra large diameterTBM/Mud-water dual-mode tunnel boring machine“China Tunnel Endeavour”Excavation breaks through 2000 meters，It has become the first shield tunnel to break through the node.，It marks the phased progress in the construction of Zhuzhao high-speed rail project.。

It is reported that，Zhuzhao high-speed rail is the first high-speed rail with a speed of 350 kilometers per hour independently invested and managed by Guangdong Province.，Jiangji sectionJJZQ-The main body of Bid 3 is Guifengshan Tunnel.，Shield Tunneling Length 4.78 kilometers，The construction conditions are very harsh.，It is the key and difficult project and control project of Zhuzhao high-speed rail.。

The stratum of shield tunneling section is complex.，There are structural fault zones、Adverse geological impacts such as joint intensive zone，Fracture development、Groundwater is abundant、Large fluctuation of rock surface，The equipment also needs to underpass the railway.、Civilian houses、Important buildings such as factory buildings（Structure）Building，The construction is extremely difficult。In order to effectively cope with the complex geological changes in the interval，And the tunneling efficiency is improved，“China Tunnel Endeavour”It's fused“Single shieldTBM+Mud-water balance”Two modes，ApplicationTBM/Slurry balance mode fast switching method，Flexible response to high groundwater levels、Argillaceous siltstone is present、Construction under unfavorable geological conditions such as structural fracture zone and joint intensive zone，The construction safety of the project is effectively guaranteed.、Quality and schedule objectives。So far，“China Tunnel Endeavour”The excavation mileage has exceeded 2000 meters.，During this period, the highest monthly footage reached 306 meters.，Maximum footage of 20 meters per day。Zai Su“Geological Museum”In the composite strata of South China.，The super-large diameter shield achieves the tunneling efficiency，It fully demonstrates the excellent technical strength of the equipment and the ability to cope with complex geological conditions.，It has accumulated valuable experience for the smooth progress of similar projects in the future.。

After the completion of Zhuzhao high-speed rail,，It will connect Jiangmen Station and the Pearl River Delta Hub Airport in series.，Seamless connection between orbit and aviation，The fastest time from Zhuhai to Pearl River Delta Hub Airport is 35 minutes.，The fastest time from Zhuhai to Zhaoqing is 36 minutes，The major cities in the Pearl River Delta along the line will be accessible in one hour.，To implement the requirements for the construction of a strong transportation province in Guangdong Province，Speed up construction“12312”Travel traffic circle is of great significance。