Standard Urban Metro EPB TBM Series
Standardized 6.45m - 6.85m CREG EPB TBM platform widely adopted across 300+ urban subway lines worldwide. Engineered for fast excavation, high reliability, and low operational maintenance costs.
Technical Specifications
| Excavation Diameter | 6.45 m – 6.85 m |
|---|---|
| Total Length | 85 m – 95 m |
| Machine Weight | approx. 550 t – 680 t |
| Cutterhead Power | 1,200 kW – 1,600 kW |
| Cutterhead Torque | 5,500 kNm – 7,200 kNm |
| Max Thrust Force | 42,000 kN |
| Max Water Pressure | 4.5 bar |
| Min Curve Radius | 250 m |
| Suitable Geology | Soft clay, silty soil, sand, and weathered granite |
Technical Specifications
| Specification Parameter | Technical Value |
|---|---|
| Excavation Diameter | 6.45 m – 6.85 m |
| Total Length | 85 m – 95 m |
| Machine Weight | approx. 550 t – 680 t |
| Cutterhead Power | 1,200 kW – 1,600 kW |
| Cutterhead Torque | 5,500 kNm – 7,200 kNm |
| Max Thrust Force | 42,000 kN |
| Max Water Pressure | 4.5 bar |
| Min Curve Radius | 250 m |
| Suitable Geology | Soft clay, silty soil, sand, and weathered granite |
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Frequently Asked Questions
What geological strata are best suited for Earth Pressure Balance (EPB) TBMs?▾
EPB TBMs excel in soft soil, soft clay, silt, sand, and high water content ground conditions typical of urban metro excavations. Soil conditioning agents (foam, polymer, bentonite) are injected into the cutterhead and working chamber to transform excavated soil into a plastic paste for continuous face support.
How does the automated guidance and earth pressure balance system work?▾
The EPB system utilizes high-precision pressure sensors in the cutterhead chamber connected to a central PLC control unit. Real-time earth pressure feedback dynamically adjusts screw conveyor speed and thrust cylinder advance rates, maintaining ground settlement within ±2mm.
What is the typical diameter customization range and shipping breakdown strategy?▾
We manufacture custom EPB TBMs with excavation diameters ranging from 3.5 meters to 16.0 meters. For international shipping, the machine is disassembled into modular heavy transport units (cutterhead spokes, main drive, shield body, gantry trailers) certified for ocean breakbulk and heavy flat-rack containers.