Shape and reinforcement optimization of underground tunnels

Article

Ghabraie, Kazem, Xie, Yi Min, Huang, Xiaodong and Ren, Gang. 2010. "Shape and reinforcement optimization of underground tunnels." Journal of Computational Science and Technology. 4 (1), pp. 51-63. https://doi.org/10.1299/jcst.4.51
Article Title

Shape and reinforcement optimization of underground tunnels

Article CategoryArticle
AuthorsGhabraie, Kazem (Author), Xie, Yi Min (Author), Huang, Xiaodong (Author) and Ren, Gang (Author)
Journal TitleJournal of Computational Science and Technology
Journal Citation4 (1), pp. 51-63
Number of Pages13
Year2010
Place of PublicationTokyo, Japan
Digital Object Identifier (DOI)https://doi.org/10.1299/jcst.4.51
Web Address (URL)http://www.jstage.jst.go.jp/article/jcst/4/1/51/_pdf
Abstract

Design of support system and selecting an optimum shape for the opening are two important steps in designing excavations in rock masses. Currently selecting the shape and support design are mainly based on designer's judgment and experience. Both of these problems can be viewed as material distribution problems where one needs to find the optimum distribution of a material in a domain. Topology optimization techniques have proved to be useful in solving these kinds of problems in structural design. Recently the application of topology optimization techniques in reinforcement design around underground excavations has been studied by some researchers. In this paper a three-phase material model will be introduced changing between normal rock, reinforced rock, and void. Using such a material model both problems of shape and reinforcement design can be solved together. A well-known topology optimization technique used in structural design is bi-directional evolutionary structural optimization (BESO). In this paper the BESO technique has been extended to simultaneously optimize the shape of the opening and the distribution of reinforcements. Validity and capability of the proposed approach have been investigated through some examples.

Keywordsunderground excavation; tunnel reinforcement; topology optimization; shape optimization; finite element analysis
ANZSRC Field of Research 2020490303. Numerical solution of differential and integral equations
400502. Civil geotechnical engineering
490304. Optimisation
Public Notes

c. Japan Society of Mechanical Engineers.

Byline AffiliationsDepartment of Agricultural, Civil and Environmental Engineering
Royal Melbourne Institute of Technology (RMIT)
Institution of OriginUniversity of Southern Queensland
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