TBM Cutterhead Thrust and Torque Calculator

Mechanized Tunnel Excavation: Compute total cutterhead thrust force, cutterhead torque, electric drive power, and penetration using the CSM rock fracture model.

Rock & Machine Parameters

Tunnel Diameter $D$ (m):

Number of Disc Cutters $N$:

Disc Diameter $d_{cut}$ (in):

Penetration Rate $p$ (mm/rev):

Rock UCS $\sigma_c$ (MPa):

Rock Tensile $\sigma_t$ (MPa):

Cutterhead Speed $N_{rpm}$ (rpm):

Average Cutter Spacing $S$ (mm):

Thrust, Torque & Advance Performance

Total Thrust Force

-- kN

Cutterhead Torque

-- kNm

Cutterhead Power

-- kW

Instantaneous Advance

-- m/h

Individual Disc Tool Loading

• Normal Force per Disc ($F_n$): -- kN (Limit: 250 kN for 17", 312 kN for 19")

• Rolling Force per Disc ($F_r$): -- kN

• Rolling Resistance Ratio ($F_r / F_n$): --

• Specific Energy ($SE$): -- $\text{MJ/m}^3$

• Cutter Bearing Load Status: --

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TBM Cutterhead Thrust and Torque Calculator

Rock & Machine Parameters

Thrust, Torque & Advance Performance

Individual Disc Tool Loading

Frequently Asked Questions