On the Design of Permanent Rock Support Using Fibre-Reinforced Shotcrete
Fibre-reinforced shotcrete (sprayed concrete) is one of the major components in the support system for tunnels in hard rock. Several empirical design methodologies have been developed over the years due to the complexity and many uncertainties involved in rock support design. Therefore, this paper a...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-02-01
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| Series: | Fibers |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-6439/11/2/20 |
| _version_ | 1797621097993076736 |
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| author | Andreas Sjölander Anders Ansell Erik Nordström |
| author_facet | Andreas Sjölander Anders Ansell Erik Nordström |
| author_sort | Andreas Sjölander |
| collection | DOAJ |
| description | Fibre-reinforced shotcrete (sprayed concrete) is one of the major components in the support system for tunnels in hard rock. Several empirical design methodologies have been developed over the years due to the complexity and many uncertainties involved in rock support design. Therefore, this paper aims to highlight how the choice of design methodology and fibre type impacts the structural capacity of the lining and the emission of greenhouse gases (GHG). The paper starts with a review of different design methods. Then, an experimental campaign is presented in which the structural performance of shotcrete reinforced with various dosages of fibres made of steel, synthetic and basalt was compared. A case study is presented in which the permanent rock support is designed based on the presented design methods. Here, only the structural requirements were considered, and suitable dosages of fibres were selected based on the experimental results. The emission of GHG was calculated for all design options based on environmental product declarations for each fibre type. The result in this paper indicates that synthetic fibres have the greatest potential to lower the emissions of GHG in the design phase. Moreover, the choice of design method has a significant impact on the required dosage of fibres. |
| first_indexed | 2024-03-11T08:50:56Z |
| format | Article |
| id | doaj.art-7cddfdf1abbf47bc9e752910f8bf02dc |
| institution | Directory Open Access Journal |
| issn | 2079-6439 |
| language | English |
| last_indexed | 2024-03-11T08:50:56Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fibers |
| spelling | doaj.art-7cddfdf1abbf47bc9e752910f8bf02dc2023-11-16T20:26:57ZengMDPI AGFibers2079-64392023-02-011122010.3390/fib11020020On the Design of Permanent Rock Support Using Fibre-Reinforced ShotcreteAndreas Sjölander0Anders Ansell1Erik Nordström2Division of Concrete Structures, KTH Royal Institute of Technology, 114 28 Stockholm, SwedenDivision of Concrete Structures, KTH Royal Institute of Technology, 114 28 Stockholm, SwedenDivision of Concrete Structures, KTH Royal Institute of Technology, 114 28 Stockholm, SwedenFibre-reinforced shotcrete (sprayed concrete) is one of the major components in the support system for tunnels in hard rock. Several empirical design methodologies have been developed over the years due to the complexity and many uncertainties involved in rock support design. Therefore, this paper aims to highlight how the choice of design methodology and fibre type impacts the structural capacity of the lining and the emission of greenhouse gases (GHG). The paper starts with a review of different design methods. Then, an experimental campaign is presented in which the structural performance of shotcrete reinforced with various dosages of fibres made of steel, synthetic and basalt was compared. A case study is presented in which the permanent rock support is designed based on the presented design methods. Here, only the structural requirements were considered, and suitable dosages of fibres were selected based on the experimental results. The emission of GHG was calculated for all design options based on environmental product declarations for each fibre type. The result in this paper indicates that synthetic fibres have the greatest potential to lower the emissions of GHG in the design phase. Moreover, the choice of design method has a significant impact on the required dosage of fibres.https://www.mdpi.com/2079-6439/11/2/20fibre-reinforcementshotcreterock supportdesign methodologyexperimental testing |
| spellingShingle | Andreas Sjölander Anders Ansell Erik Nordström On the Design of Permanent Rock Support Using Fibre-Reinforced Shotcrete Fibers fibre-reinforcement shotcrete rock support design methodology experimental testing |
| title | On the Design of Permanent Rock Support Using Fibre-Reinforced Shotcrete |
| title_full | On the Design of Permanent Rock Support Using Fibre-Reinforced Shotcrete |
| title_fullStr | On the Design of Permanent Rock Support Using Fibre-Reinforced Shotcrete |
| title_full_unstemmed | On the Design of Permanent Rock Support Using Fibre-Reinforced Shotcrete |
| title_short | On the Design of Permanent Rock Support Using Fibre-Reinforced Shotcrete |
| title_sort | on the design of permanent rock support using fibre reinforced shotcrete |
| topic | fibre-reinforcement shotcrete rock support design methodology experimental testing |
| url | https://www.mdpi.com/2079-6439/11/2/20 |
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