What is NATM?

Question

What is NATM?

Accepted Answer

NATM stands for New Austrian Tunneling Method, a technique used in underground construction and tunneling.

NATM is a tunneling method that originated in Austria in the 1960s.
It involves excavating the tunnel while providing temporary support using rock bolts, shotcrete, and steel arches.
The method relies on the inherent strength of the surrounding rock mass for long-term stability.
NATM allows for flexibility in tunnel design and construction, adapting to geological conditions encountered during excavation.
It has been successfully used in various tunneling projects worldwide, including the Channel Tunnel between the UK and France.

Accepted Answer

New Austrian Tunneling method, NATM is an observational method, depends on the empirical properties of Rockmass, support decieded after evaluation of rockmass properties, moreover NATM is a design as go.