New Standard from Last Update.

1. SCOPE

This standard (Part 2) provides guidelines for construction of tunnels using mechanized tunnelling methods through tunnel boring machines (TBM) in soil and rock. The scope of this standard is to lay out the guidelines and provisions related to design and construction of TBM tunnels. This standard also defines guidelines for selection of type of TBM for tunnelling, geotechnical investigation, interpretation, characterization, properties and how they affect TBM tunnelling; manufacturing, durability and curing criteria for segmental lining, grouting in TBM lining; risk and mitigation measures related to TBM tunnels and construction of cross-passages in TBM tunnels.

2. REFERENCES

The standards listed in Annex A contain provisions which through reference in this text, constitute provision of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of these standards.