New Standard from Last Update.

1. SCOPE

This standard (Part 1) provides guidelines for construction of tunnels using conventional tunnelling methods.

2. REFERENCES

The standards given below contain provisions which through reference in this text, constitute provision of this standard. At the time of publication, the editions indicated were valid. Any 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 the standards indicated below:

269 : 2015 Ordinary Portland cement - Specification (sixth revision)

432 Specification for mild steel and medium tensile steel bars and hard-drawn steel wire for concrete reinforcement:

(Part 1) : 1982 Mild steel and medium tensile steel bars (third revision)

(Part 2) : 1982 Hard-drawn steel wire (third revision)

456 : 2000 Plain and reinforced concrete - Code of practice (fourth revision)

800 : 2007 General construction in steel - Code of practice (third revision)

4880 (Part 6) : 1971 Code of practice for design of tunnels conveying water: Part 6 Tunnel supports

5878 Code of practice for construction of tunnels conveying water:

(Part 4) : 1971 Tunnel supports

(Part 6) : 1975 Steel lining

9012 : 1978 Recommended practice for shotcreting

9103 : 1999 Concrete admixtures - Specification (third revision)

13365 (Part 2) : 2019 Quantitative classification systems of rock mass - Guidelines: Part 2 Rock mass quality for prediction of support pressure, support system and engineering properties in underground openings (first revision)

15388 : 2003 Silica fume - Specification

16481 : 2022 Textiles - Synthetic micro fibres for use in cement based matrix - Specification (second revision)

16993 : 2018 Microfine ordinary portland cement - Specification

17446 : 2020 Observational method for tunnelling in rock masses - Guidelines