Planned and emergency cutterhead disc cutter, scraper, and copy cutter replacement under hyperbaric conditions, with full wear assessment and structural inspection of the cutterhead.
Timely and accurate cutterhead tool changes are critical to maintaining TBM advance rates and preventing catastrophic tool failure. KCC's hyperbaric teams work efficiently in confined, pressurised conditions to minimise TBM downtime and protect the project programme.
Compressed Air Interventions (≤3.0 bar)
Standard compressed air (CA) entry into TBM excavation chambers for cutterhead inspection, cutter tool change, and face maintenance. Conducted under IMCA D 045, HSE L96, and ADCI Consensus Standards at pressures up to 3.0 bar.
High-Pressure Compressed Air — Heliox / Trimix
High-pressure interventions above 3.0 bar using heliox or trimix breathing mixtures to eliminate nitrogen narcosis and reduce DCI risk. Conducted under IMCA D 045 (High Pressure Compressed Air Supplement) and EDTC HPCA decompression tables.
Saturation Hyperbaric Interventions
Saturation-based hyperbaric interventions for extended TBM maintenance campaigns, eliminating repeated decompressions and DCI risk. Workers live at intervention pressure via a pressurised transfer shuttle (PTS) for multi-day campaigns.
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Hyperbaric Tunnelling
Specialist hyperbaric intervention services for TBM and bored tunnel projects operating under compre
View all Hyperbaric Tunnelling servicesIMCA · ADCI · HSE · HKCP Compliant
All diving operations conducted to IMCA, ADCI, HSE & HKCP standards
Our team is ready to discuss your project requirements and provide a detailed proposal.