Tunnel Boring Machine
Versatility: The tunnel boring machine integrates optics, machinery, electricity, hydraulics, sensing
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Key words: casting and forging
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The shield tunneling machine is a device specifically used for tunnel excavation, with the following main characteristics:
Versatility: The shield tunneling machine integrates light, machinery, electricity, hydraulics, sensing, and information technology, capable of functions such as excavating and cutting soil, transporting spoil, assembling tunnel linings, and measuring and guiding corrections.
High degree of automation: The shield tunneling machine has a high level of automation, which can save labor, speed up construction, and is not affected by weather.
Strong adaptability: The shield tunneling machine is suitable for various geological conditions, including soft soil and soft rock strata (such as silt, new soil, gravel, etc.).
Complex technology: The design and manufacturing of the shield tunneling machine involve multiple disciplines such as geology, civil engineering, mechanics, hydraulics, electrical engineering, control, and measurement, with extremely high reliability requirements.
Long history: The history of the shield tunneling machine can be traced back over 180 years, first proposed and applied in practical engineering by the Frenchman Brunel.
Application Fields
The shield tunneling machine is widely used in the following fields:
Railways: Used for the construction of railway tunnels.
Highways: Used for the excavation of highway tunnels.
Subways: Used for the construction of subway tunnels.
Water conservancy: Used for tunnel construction in water conservancy projects.
Municipal engineering: Used for the construction of urban underground pipelines and infrastructure.
| Soil type of stratum | Soft rock and clay |
| Minimum turning curve radius | 250m |
| Maximum slope | 3.50% |
| Total length | 9m (approximately) |
| Total weight | 370 tons (approximately) |
| Excavation diameter | 6,400mm |
| Outer diameter of front shield | 6,390mm |
| Outer diameter of the shield | 6,380mm |
| Outer diameter of tail shield | 6,370mm |
| Shield tail gap | 45mm |
| Total equipment power | 1650kW (approximately) |
| Maximum excavation speed | 80mm/min |
| Maximum thrust | 42575kN |
| Shield tail seal | 3 rows of sealing brushes |
| Soil pressure sensor | Three, on the earth pressure wall |
| Hydraulic sensor | 4, 1 for each propulsion cylinder group |
| Main bearing life | 10000 hours, according to DIN ISO 281, L10 |
| Maximum work pressure | 3bar |
| Maximum design pressure | 4.5bar |
| Including the total length of supporting facilities | 72m |
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