Spiling bolts and reinforced ribs of sprayed concrete replace concrete lining

This article discusses how and when spiling bolts and reinforced ribs of sprayed concrete should be used to achieve safe progress in poor rock mass conditions. It is discussed when bolting and reinforced ribs of sprayed concrete can replace cast in place concrete as permanent rock support. Examples...

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Bibliographic Details
Published in:Tunnelling and underground space technology 2002-10, Vol.17 (4), p.403-413
Main Authors: Holmøy, Kristin H, Aagaard, Bent
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Concrete lining
Concretes. Mortars. Grouts
Exact sciences and technology
Materials
Other special applications (sand concrete, roller compacted concrete, heavy concrete, architectural concrete, etc.)
Reinforced ribs of sprayed concrete
Rock support
Spiling bolts
Tunnelling
Tunnels, galleries
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Summary:This article discusses how and when spiling bolts and reinforced ribs of sprayed concrete should be used to achieve safe progress in poor rock mass conditions. It is discussed when bolting and reinforced ribs of sprayed concrete can replace cast in place concrete as permanent rock support. Examples from the challenging Frøyatunnel illustrate how this was achieved in poor to extremely poor rock mass conditions. Numerical models comparing sprayed concrete and cast in place concrete are briefly reported.
ISSN:0886-7798
1878-4364
DOI:10.1016/S0886-7798(02)00065-2