Tunnelling

Combar® is very machinable, so the tunnel boring machine can smoothly pass through the shaft wall. This reduces construction time and costs.

Technical approval

Environmental product declaration

Easy machinability

Downloads

Faster tunnel driving
Tunnel boring machines (TBM) cannot pass directly through shaft walls with steel reinforcement; the TBM must be stopped and the walls cut through using conventional mining methods; Combar® reinforced diaphragm wall and bore pile elements are highly machinable, which means the TBM can seamlessly pass through
Low construction costs
Uninterrupted excavation through the shaft walls with TBM significantly reduces construction time and costs
High standard of safety
Walls do not have to be cut through using conventional mining methods when using Combar®; lower risk of accidents; enhanced employee safety
Versatile
As Combar® is highly machinable, it is perfect for use in the following areas:
- soft-eyes of shaft walls in tunnel construction
- diaphragm walls
- bored piles
- temporary concrete structures