New Standard from Last Update.

1. SCOPE

This standard gives specific guidelines for geological investigation as required for fixing of tunnel alignments, to evaluate geologic conditions along the tunnel route, requirement of geotechnical analysis and proposals for rock support and treatment of weak zones. It also covers both surface and sub-surface investigations to be carried out in different stages of investigations.

2. REFERENCES

The standards listed contain provisions, which through reference in this text constitute provisions 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 possibilityof applying the most recent editions of the standards indicated in Annex A.