Simultaneous pattern and size optimisation of rock bolts for underground excavations

Nguyen, Tin, Ghabraie, Kazem and Tran-Cong,T 2015, Simultaneous pattern and size optimisation of rock bolts for underground excavations, Computers and geotechnics, vol. 66, pp. 264-277, doi: 10.1016/j.compgeo.2015.02.007.

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Title Simultaneous pattern and size optimisation of rock bolts for underground excavations
Author(s) Nguyen, Tin
Ghabraie, KazemORCID iD for Ghabraie, Kazem
Journal name Computers and geotechnics
Volume number 66
Start page 264
End page 277
Total pages 14
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2015
ISSN 0266-352X
Keyword(s) Topology optimization
Underground excavation
Tunnel reinforcement
Rock bolts
Size optimization
Layout optimization
Summary Designing a rock bolt reinforcement system for underground excavation involves determining bolt pattern, spacing, and size. In this paper, a topology optimisation technique is presented and employed to simultaneously optimise these design variables. To improve rock bolt design, the proposed technique minimises a displacement based function around the opening after bolt installation. This optimisation technique is independent of the material model and can be easily applied to any material model for rock and bolts. It is also extremely flexible in that it can be applied to any mechanical analysis method. To illustrate the capabilities of this method, numerical examples with non-linear material models and discontinuities in the host rock are presented. It is shown that the complexity of systems optimised using this approach is only restricted by limitations of the method used to analyse mechanical system responses.
Language eng
DOI 10.1016/j.compgeo.2015.02.007
Field of Research 090501 Civil Geotechnical Engineering
010303 Optimisation
Socio Economic Objective 880102 Rail Infrastructure and Networks
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Elsevier
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