Railway Construction Heavy Industry "Aoqin No.1" Shield Machine Helps the First Large-diameter Submarine Shield Tunnel for Cross-border Traffic in Qinao

Recently，Jointly built by China Railway Construction Heavy Industry and China Railway 16th Bureau“Aoqin No.1”Earth Pressure Balance Shield Machine Helps Macao Light Rail Extend Hengqin Line Project to Smooth Completion of Subsea Tunnel，It marks a breakthrough in Macao's first undersea tunnel project constructed by shield method.。

“Aoqin No.1”The earth pressure balance Shield Machine came out of the tunnel smoothly

It is reported that，The Macau Light Rail Extension Hengqin Line Project is a key livelihood project of the Macau government and a tribute project for the 25th anniversary of the handover.。As an important link between Macao and Hengqin, Guangdong, Macao and Shenzhen.，This project is the first time to use shield method in rail transit construction.，“Aoqin No.1”It is also the largest diameter Shield Machine currently used by the Macao SAR Government.。

Shield interval tunnel interval crossing construction（Structure）Building risk is high，For example, the small curve passes through the pile foundation group of Hengqin Port.、Old pipe pile foundation group，Long distance traversing shallow overburden sea area、Macao high-pressure natural gas pipeline, etc.，The facing radius is small、Chuanjian（Structure）There are many buildings、Construction technical problems such as shallow covering soil。

Through the ceremony site

In order to cope with the above engineering difficulties,，Railway Construction Heavy Industry targeted R & D and design“Double Hinged”Control System、High precision vapor-liquid equilibrium technique、Automatic measurement of shield tail gap、Automatic tunneling and other core technologies，Make sure“Aoqin No.1”Capable of overcoming small turning crossing building（Structure）Buildings and shallow soil-covered sea areas and many other difficult problems.，It provides guarantee for efficient and safe construction.。

This time“Aoqin No.1”Nearly two months ahead of the milestone node ushered in an important moment from the start of the shield to the breakthrough.，It not only fills in the blank of shield construction in Macao's rail transit construction,，It also accumulates experience for the same type of shield construction in the future.，It highlights the professionalism and reliability of railway construction heavy industry products in the field of tunnel construction.，To realize Macao's integration into the Guangdong-Hong Kong-Macao Greater Bay Area“One hour life circle”The goal has contributed its strength.。

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