Geotechnical Site Investigations for Underground Projects Volume 1 (1984) / Chapter Skim
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Appendix D: Geotechnical Design Reports, Rock Tunnels and Earth Tunnels
Appendix D: Geotechnical Design Reports, Rock Tunnels and Earth Tunnels
Pages 149-154
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From page 149... ...
It is intended that the reports will be based on and present the most current subsurface information pertaining to the Design section and each particular construction contract. On that account, where applicable, the reports are to be prepared in successive stages as follows: Stage 1, for presentation to the General Engineering Consultant at the preliminary review stage of design.
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From page 150... ...
The report shall conform to the Geotechnical Design Report format furnished to the Designer by the Authority. The completed report is to reflect the comments made at the final review presentation and is to be printed as an appendix to the construction specifications.
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From page 151... ...
Types of initial support considered, such as: Steel ribs Shotcrete Rock bolts. Types of permanent lining considered, such as: Cast-in-place reinforced concrete lining Rock bolts Shotcrete Steel ribs and shotcrete composite.
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From page 152... ...
Potential effects on: Tunnels and pillars Shafts Portals Double crossovers Stations and entrance excavations Solutions: TBM design Excavation sequences Blasting requirements Early initial support Grouting Groundwater control. Instrumentation.
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From page 153... ...
Types of initial support considered, such as: Steel ribs and lagging Metallic plate liner Types of permanent lining considered, such as: Cast-in-place reinforced concrete lining Fabricated gray iron segmented lining Fabricated ductile iron segmented lining 153
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From page 154... ...
G DESIGN OF TUNNEL SUPPORT Initial support: Expansion of steel ribs Grouting tail skin void Grouting voids behind lining Construction and short-term loadings Permanent lining: Loading conditions Basis of stress analysis Design thickness H
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