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| Title Details: | |
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Intact strong rock surrounding an underground opening |
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| Authors: |
Sofianos, Alexandros |
| Reviewer: |
Nomikos, Pavlos |
| Description: | |
| Abstract: |
In hard rocks, their stress state can be calculated by modeling them as elastic media. The concepts of the primary geostatic stress field and the secondary stress field induced by tunnel excavation are introduced. Closed-form solutions are provided for stresses and displacements around simple cross-sectional shapes, such as circles and ellipses, due to the arising secondary stress field. The zone of influence of one tunnel on another is also given. The concepts of the rock characteristic curve and rock relaxation due to tunnel advancement are presented, along with the relationship between them. The interaction between support systems and the rock mass is discussed. It is demonstrated that tunnel deformation prior to failure is very small and that passive support elements installed do not experience significant loading. The zones of tunnel overstress are delineated, and guidelines for their relief and dimensioning are provided. Worked examples and practice problems involving simple and complex cross-sections follow.
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| Type: |
Chapter |
| Creation Date: | 2015 |
| Item Details: | |
| License: |
http://creativecommons.org/licenses/by-nc-nd/3.0/gr |
| Handle | http://hdl.handle.net/11419/3462 |
| Bibliographic Reference: | Sofianos, A. (2015). Intact strong rock surrounding an underground opening [Chapter]. In Sofianos, A. 2015. Support for Underground Works [Undergraduate textbook]. Kallipos, Open Academic Editions. https://hdl.handle.net/11419/3462 |
| Language: |
Greek |
| Is Part of: |
Support for Underground Works |
| Publication Origin: |
Kallipos, Open Academic Editions |