Tunnel Boring Machine (TBM) Technology

Specialty chemicals for TBM tunnelling


TBM tunnelling without chemicals is unthinkable. Normet provides efficient tunnel boring machine (TBM) additives combined with expert advice to fully support our customers. One of the most important considerations in the use of our TBM materials is the environmental impact. Normet TBM additivies have been carefully developed with regards to their eco-compatibility and we continue to be fully committed in the development and manufacturing of “green” chemicals helping you to operate in an environmentally responsible manner.

Our new range of next generation, high specification plant oil based tail sealants compliments our product portfolio.  TamSeal TG91 (Driving Grade Tail Seal Grease) and TamSeal TG92 (First Fill Tail Seal Grease) offer significant improvements compared to our existing grades, including reduced consumption, pumpability, washout, fire resistant and biodegradability.  The performance of our soil conditioning foams, anti-clay agents and polymers have also been enhanced through product development to provide maximum operational efficiency in TBM advancement rates in soft ground or hard rock.

Normet provide a full range of materials for EPB Tunnel Boring Machine (TBM), Slurry TBM, Single TBM and Gripper TBM systems.

Download TBM Brochure

Tunnel Boring Machine (TBM) Core Products

  • Soil Conditioning Foams and Polymers –TamSoil range
    • Allow to reduce TBM cutter head torque values
    • Secure the complete filling of the working chamber
    • Allow higher TBM speed
    • Decrease wear
    • Reduce necessary cleaning
  • Anti-Dust and Anti-Wear Additives –TamSoil 800AD / TamSoil 860AW
    • Cutter tool abrasion can be reduced by using foams combined with anti-wear polymers
  • Tail Sealants –TamSeal TG range
    • Keep the TBM tail shield watertight regardless of the outside pressure
  • Main Bearing Greases –TamGrease BL11, EP2 Grease, HBW Grease
    • Protect and lubricate the main bearing seal
  • Annulus Grouts–TamCem 8BFG / TamCem 9BFG / TamCem R / TamCem 23SSR / TamCem HCA / TamShot 10SS
    • Used for filling the gap (annulus grouting) between the geology and the segments
Additives for EPB Tunnel Boring Machine (TBM)

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