On a new journey, China Railway Construction Heavy Industries independently developed shield machines and exported them to Italy to help Sicily's railway construction.

September 18, 2023

September 15，One with diameter of 9.The 36-meter Shield Machine is offline in the second industrial park of Changsha Railway Construction Heavy Industry.，This is the first time that the high-end underground engineering equipment independently developed by Railway Construction Heavy Industries has been exported to Italy and the European Union market.。

The equipment will participate in the construction of a railway tunnel between the cities of Messina and Catania in Sicily, Italy.，The cutter head of this Shield Machine is coated with“Three-legged Medusa”Pattern，“Three-legged Medusa”It's another name for Sicily.。The three legs point to the three corners of the island.，Represents the patron saint of the island.。

The total tunneling length of the equipment is about 12.54 kilometers，It mainly passes through shale、Phyllite、Conglomerate、 Basalt 、Sandstone and other complex strata，The uniaxial compressive strength of rock is about 4-45 MPa。Requirements for engineering geological and hydrological conditions，The research and development team of China Railway Construction Heavy Industry adopts the design concept of the most advanced green rock tunnel Boring Machine in the world.，Permanent magnet drives are developed and applied、High quality power supply system、Synchronization of pushing and splicing、Automatic device management、Automatic tunneling parameter control、Automatic lifting of segments、Many new technologies such as ultra-high pressure relief and automatic steering of trolley，And further improve that energy conservation and environmental protection of the equipment.、Level of automation，And that operation energy consumption is reduce.，The number of operators is reduced and the construction efficiency is greatly improved。

To meet the needs of the EU market，The development team also configured the equipment to comply with the EU explosion-proof directive.（ATEX）Gas detection system required、Ventilation、Emergency lighting、Communication、Emergency systems such as power supply，Make the whole machine meet the requirements of EUCECertification（Safety compliance standards）Request。