Downloads
New Austrian Tunnelling Method (NATM)
The Austrian Standards Institute published ÖNORM B 2203-1 “Underground Works – Works contract, Part 1: Cyclic driving (conventional tunnelling)” in 2001.
This Austrian Standard includes particular directives for tendering procedures, preparation of the bid and terms of contract for the execution of conventional tunnelling called “New Austrian Tunnelling Method (NATM)”.
In addition to the Standard the Austrian Society for Geomechanics in 2011 published the document “The Austrian Practice of NATM Tunnelling Contracts” which describes the application of the Standard in detail with respect to the NATM.
The main chapters of the document are Tendering and Costing as well as Construction and Payment with information in detail about
- Time-dependent costs
- Tunnelling interruptions
- Tunnel classes
- Difficulties due to water ingress
- Over-excavation, excess concrete
- Selection of supporting measures and classifying tunnelling
- Examples describing the method are presented in an annex
The Austrian Society for Geomechanics recommends the download of this document in addition to the Austrian Standard ÖNORM B 2203-1:2001.
The document “The Austrian Practice of NATM Tunnelling Contracts” (PDF, 637 kB) with its annex (PDF, 900 kB) is free of charge.
