April 26，China Railway Construction Heavy Industry Co., Ltd. and Guangzhou Metro Group、Super-large diameter slurry balance shield machine built by China Railway 11th Bureau“Yangcheng”Offline in the primary industry park of Railway Construction Heavy Industry。

“Yangcheng”Excavation diameter 13.56 meters，It will be used in Baifang Shield Well of Guanghua Intercity-Construction of Fangshi Station Section Project。The shield tunnel of the project is strong in long-distance crossing、Moderately weathered argillaceous siltstone，Underpass many important buildings and structures along the line，The shallowest overburden is only 8.74 meters。Mud cake is easy to form on the cutter head during shield tunneling、Stagnation and other problems，The project has high requirements for surface settlement control.、The construction is difficult。

Xinhua News Agency reported“Yangcheng”Off the line

In view of the above engineering difficulties，The R & D team of China Railway Construction Heavy Industry Co., Ltd.“Yangcheng”Targeted design is carried out.，It carries a series of key core technologies and intelligence.、Humanized innovative design。“Yangcheng”Heavy-duty composite cutterhead configured，Multi-way instantaneous central scouring function，At the same time, the tool optimization design is adopted.，Tool change frequency can be reduced，And that service life of the cut is prolonged。The operation of the shield machine is flexible、Convenience，And that safety factor of the whole machine is high，Provide strong guarantee for safe and efficient construction of tunnel。

Guanghua Intercity Railway is a provincial railway.、Municipal key livelihood projects，The total length of the line is 39.Six kilometers，The design speed is 160 kilometers per hour。After the completion of the line，It can realize the 30-minute access between the peripheral center of Guangzhou and the city center.，High-speed rail in the Greater Bay Area will be realized、Ordinary speed railway、City area（Suburbs）Integration and connection of railway and other rail networks，Together, they form the north-south rail transit artery of Dawan District.，It is of great significance to promote the economic and social development of the Bay Area.。