Why we use Bulkheads
Bulkheads are used at the tunnel mouth to prevent air escaping from the tunnel and allows you to put more air into the tunnel, to compress it, pressurizing the tunnel. The bulkhead effectively acts as a seal, preventing any air from escaping the tunnel. It is used ordinarily in interventions (when a Tunnel boring Machine needs its face inspecting to check the quality of the tooling), to support ground pressure.
To allow the workers to inspect the tooling, they must stand in-front of the TBM exposing themselves to unsupported ground, which could potentially collapse. Compressed Air is used to support the face by using a ‘pressure’ of air to prevent the ground closing in.
Additional Hire Equipment
Over the period of the project, we also supplied; Air Manlock, Medical Decompression Chamber, Air Process Container, Medical Office and Compressed Air System components.