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https://www.rocscience.com/documents/pdfs/rocnews/winter2012/Rock-Support-Interaction-Analysis-for-Tunnels-Hoek.pdf
Rock-Support Interaction analysis for tunnels in weak rock masses Introduction Tunnelling in weak rock presents some special challenges to the geotechnical engineer since misjudgements in the design of support systems can lead to very costly failures.
https://www.sciencedirect.com/science/article/pii/S1674775514000390
In some critical cases, like the simulation of the effectiveness of forepoling, tunnel advance and sequential support installation, three-dimensional numerical models should be used. However, in weak rock masses, the uses of sound engineering judgement and experiences from similar cases are valuable for the design and the construction of tunnel.Cited by: 22
https://rocscience.com/assets/resources/learning/papers/A-Two-Dimensional-Approach-for-Designing-Tunnel-Support-in-Weak-Rock.pdf
A TWO-DIMENSIONAL APPROACH FOR DESIGNING TUNNEL SUPPORT IN WEAK ROCK John H. Curran, University of Toronto Reginald E. Hammah, Rocscience Inc. Thamer E. Yacoub, Rocscience Inc. ABSTRACT The design of support for tunnels in weak rock is an iterative process. A good starting point is essential to the process and facilitates safe and economic design.
https://www.researchgate.net/publication/262305598_Tunnel_behaviour_and_support_associated_with_the_weak_rock_masses_of_flysch
Tunnel behaviour and support associated with the weak rock masses of flysch Article (PDF Available) in Journal of Rock Mechanics and Geotechnical Engineering 6(3) · June 2014 with 2,630 Reads
http://nff.no/wp-content/uploads/2014/01/Publication_19.pdf
special rock support solutions for TBM-tunnels. Decisions on rock support are based on competence, available site investigations, common practise and most important, actual observations of the rock mass during excavation. The basic approach to rock support in Norwegian tunnelling is to utilise the inher-
https://www.researchgate.net/publication/262600175_Tunnel_and_Portal_Stability_Assessment_in_Weak_Rock
An analysis of some 200 case records has revealed a useful correlation between the amount and type of permanent support and the rock mass quality Q, with respect to excavation stability.
https://www.sciencedirect.com/science/article/abs/pii/S1674775514000390
The magnitude of squeezing and tunnel support requirements are also discussed for various flysch rock mass types under different overburdens. Detailed principles and guidelines for selecting immediate support measures are proposed based on the principal tunnel behaviour mode and the experiences obtained from these 12 tunnels.Cited by: 22
https://www.coursehero.com/file/16177223/H1998b/
Evert Hoek – Tunnel support in weak rock Page 2 of 13 Keynote address, Symposium of Sedimentary Rock Engineering, Taipei, Taiwan, November 20-22, 1998 Tunnel support in weak rock Evert Hoek Consulting Engineer, 3034 Edgemont Boulevard, North Vancouver, British Columbia, Canada, V7R 4X1 SYNOPSIS: The stability of tunnels in weak rock is controlled by the ratio of the uniaxial compressive ...
http://www.umich.edu/%7Egs265/tunnel.htm
The steep angle of the bedding planes with respect to the tunnel will result in the wedge-shaped rock body (aed) sliding into the tunnel and putting stress on the support (ac). The lateral force, P, can be estimated from the mass of the sliding rock body and the angle which it makes with the tunnel support.
http://www.tunnelcanada.ca/members/documents/2016/TAC2016/pdfs/tac2016Paper141.pdf
Using Innovative Techniques in order to Optimize Tunnel Support Schemes within Weak Rock Masses. Vlachopoulos, N. 1 and Forbes B. 2 1Royal Military College of Canada, Kingston, Ontario, Canada 2Queen’s University, Kingston, Ontario, Canada ABSTRACT This paper addresses topics associated with the design of near face tunnel support systems used in civil infrastructure
https://www.rocscience.com/documents/pdfs/rocnews/winter2012/Rock-Support-Interaction-Analysis-for-Tunnels-Hoek.pdf
Rock-Support Interaction analysis for tunnels in weak rock masses Introduction Tunnelling in weak rock presents some special challenges to the geotechnical engineer since misjudgements in the design of support systems can lead to very costly failures.
https://www.sciencedirect.com/science/article/pii/S1674775514000390
In some critical cases, like the simulation of the effectiveness of forepoling, tunnel advance and sequential support installation, three-dimensional numerical models should be used. However, in weak rock masses, the uses of sound engineering judgement and experiences from similar cases are valuable for the design and the construction of tunnel.Cited by: 22
https://rocscience.com/assets/resources/learning/papers/A-Two-Dimensional-Approach-for-Designing-Tunnel-Support-in-Weak-Rock.pdf
A TWO-DIMENSIONAL APPROACH FOR DESIGNING TUNNEL SUPPORT IN WEAK ROCK John H. Curran, University of Toronto Reginald E. Hammah, Rocscience Inc. Thamer E. Yacoub, Rocscience Inc. ABSTRACT The design of support for tunnels in weak rock is an iterative process. A good starting point is essential to the process and facilitates safe and economic design.
https://www.researchgate.net/publication/262305598_Tunnel_behaviour_and_support_associated_with_the_weak_rock_masses_of_flysch
Tunnel behaviour and support associated with the weak rock masses of flysch Article (PDF Available) in Journal of Rock Mechanics and Geotechnical Engineering 6(3) · June 2014 with 2,630 Reads
http://nff.no/wp-content/uploads/2014/01/Publication_19.pdf
special rock support solutions for TBM-tunnels. Decisions on rock support are based on competence, available site investigations, common practise and most important, actual observations of the rock mass during excavation. The basic approach to rock support in Norwegian tunnelling is to utilise the inher-
https://www.researchgate.net/publication/262600175_Tunnel_and_Portal_Stability_Assessment_in_Weak_Rock
An analysis of some 200 case records has revealed a useful correlation between the amount and type of permanent support and the rock mass quality Q, with respect to excavation stability.
https://www.sciencedirect.com/science/article/abs/pii/S1674775514000390
The magnitude of squeezing and tunnel support requirements are also discussed for various flysch rock mass types under different overburdens. Detailed principles and guidelines for selecting immediate support measures are proposed based on the principal tunnel behaviour mode and the experiences obtained from these 12 tunnels.Cited by: 22
https://www.coursehero.com/file/16177223/H1998b/
Evert Hoek – Tunnel support in weak rock Page 2 of 13 Keynote address, Symposium of Sedimentary Rock Engineering, Taipei, Taiwan, November 20-22, 1998 Tunnel support in weak rock Evert Hoek Consulting Engineer, 3034 Edgemont Boulevard, North Vancouver, British Columbia, Canada, V7R 4X1 SYNOPSIS: The stability of tunnels in weak rock is controlled by the ratio of the uniaxial compressive ...
https://www.rocscience.com/assets/resources/learning/hoek/Practical-Rock-Engineering-Chapter-12-Tunnels-in-Weak-Rock.pdf
Tunnels in weak rock 4 Figure 3: Plastic zone surrounding a circular tunnel. If the internal support pressure pi is greater than the critical support pressure pcr, no failure occurs, the behaviour of the rock mass surrounding the tunnel is elastic and the
https://www.rocscience.com/documents/pdfs/rocnews/winter2012/Rock-Support-Interaction-Analysis-for-Tunnels-Hoek.pdf
Rock-Support Interaction analysis for tunnels in weak rock masses Introduction Tunnelling in weak rock presents some special challenges to the geotechnical engineer since misjudgements in the design of support systems can lead to very costly failures.
https://www.sciencedirect.com/science/article/pii/S1674775514000390
Therefore, the design of tunnels in weak flysch rock masses must involve the use of numerical methods. In some critical cases, like the simulation of the effectiveness of forepoling, tunnel advance and sequential support installation, three-dimensional numerical models should be used.Cited by: 22
https://rocscience.com/assets/resources/learning/papers/A-Two-Dimensional-Approach-for-Designing-Tunnel-Support-in-Weak-Rock.pdf
A TWO-DIMENSIONAL APPROACH FOR DESIGNING TUNNEL SUPPORT IN WEAK ROCK John H. Curran, University of Toronto Reginald E. Hammah, Rocscience Inc. Thamer E. Yacoub, Rocscience Inc. ABSTRACT The design of support for tunnels in weak rock is an iterative process. A good starting point is essential to the process and facilitates safe and economic design.
https://rocscience.com/assets/resources/learning/hoek/1998-Tunnel-Support-in-Weak-Rock.pdf
Evert Hoek – Tunnel support in weak rock Page 3 of 13 Figure 2: Pattern of deformation in the rock mass surrounding an advancing tunnel. The value of GSI can be estimated in the field from the rock mass descriptions illustrated in Figure 3.
https://www.sciencedirect.com/science/article/abs/pii/S1674775514000390
The magnitude of squeezing and tunnel support requirements are also discussed for various flysch rock mass types under different overburdens. Detailed principles and guidelines for selecting immediate support measures are proposed based on the principal tunnel behaviour mode and the experiences obtained from these 12 tunnels.Cited by: 22
https://www.rocscience.com/software/rocsupport
Feb 19, 2018 · RocSupport is an easy-to-use software tool for estimating deformation in circular or near circular excavations in weak rock and visualization of the tunnel interaction with various support systems. Given the tunnel radius, in-situ stress conditions, rock parameters and support parameters, a ground reaction curve and a support reaction curve are calculated.Location: 54 Saint Patrick St, Toronto, M5T 1V1
https://www.eoas.ubc.ca/courses/eosc547/lecture-material/Topic6-WeakRockTunnelling.pdf
Tunnelling in Weak Rock – Sequential Excavation 2 of 38 Tunnelling Grad Class (2014) Dr. Erik Eberhardt Ground Reaction - Convergence A key principle in underground construction involving weak rock is the recognition that the main component of tunnel support is the strength of the rock mass and that it can be mobilized by minimizing
http://nff.no/wp-content/uploads/2014/01/Publication_19.pdf
special rock support solutions for TBM-tunnels. Decisions on rock support are based on competence, available site investigations, common practise and most important, actual observations of the rock mass during excavation. The basic approach to rock support in Norwegian tunnelling is to utilise the inher-
https://science.howstuffworks.com/engineering/structural/tunnel3.htm
The stand-up time for solid, very hard rock may measure in centuries. In this environment, extra support for the tunnel roof and walls may not be required. However, most tunnels pass through rock that contains breaks or pockets of fractured rock, so engineers must add additional support in the form of bolts, sprayed concrete or rings of steel ...
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