NFM TECHNOLOGIES 5, place Jules Ferry
69456 LYON Cedex 06 France
Tel. +33 (0)426 848 700;
Fax +33 (0)426 848 710
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Underground work

Ranked amongst the most important tunnel-boring machine manufacturers on the world market, NFM Technologies provides its customers with tunneling machines of 4 to more than 15 metres in diameter, suited to all types of geology, acknowledged for their reliability and robustness.

Our teams’ expertise has enabled us to define our own processes for developing tailored technical solutions for tunnel excavation.

Beyond tunnel-boring machine design and manufacture, we provide all services required for correct work site operation: technical assistance, maintenance, regular cutting tool inspections and replacements.

Hard rock machines

Our product offer is built around three types of tunneling machines for all types of geology, whatever the hardness of the rocks and the diameter to dig: single shield machines, telescopic shield machines and gripper machines.

Each of these technologies integrates the constraints (abrasion, vibrations, etc.) facing the tunnel-boring machines digging for long distances.

Soft ground machines

We design tunnel-boring machines intended for digging in soft ground, whether soft solid ground ("earth pressure" technic) or unstable soft ground ("mud pressure" technic).

Dual-mode machines

We have also developed a range of "dual-mode" tunnel-boring machines whose adaptation abilities to varied ground guarantee improved performance throughout the tunnel boring process.

For example, we create pressurised hard rock tunnel-boring machines that use mud pressure / earth pressure according to the type of terrain crossed, along with machines for alternating between hard rock and soft ground.

We search for the best compromise according to geology changes along a given route, in view of designing the best suited tunneling machine.

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