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Implementation of reliability-based thresholds to excavation of shotcrete-supported rock tunnels
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Soil and Rock Mechanics.ORCID iD: 0000-0001-5372-7519
COMSOL, Stockholm, Sweden.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Soil and Rock Mechanics.ORCID iD: 0000-0002-8152-6092
2023 (English)In: Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards, ISSN 1749-9518, E-ISSN 1749-9526, Vol. 17, no 2, p. 361-375Article in journal (Refereed) Published
Abstract [en]

Modern tunnelling in rock relies heavily on information from monitoring and observations during construction as a means to reduce the considerable uncertainty that originates from a lack of knowledge about the ground conditions. By formally integrating the monitoring information into the structural safety evaluation, a comprehensive risk-based design framework can be achieved. The establishment of relevant thresholds against unacceptable structural behaviour is a key aspect of this work. This paper presents an extensive application example based on real-case data, showing how a reliability-based threshold can be established to ensure the serviceability of a shotcrete lining in a rock tunnel in a challenging geological setting. The authors address and discuss practical approaches to consider the model uncertainty related to the confinement loss caused by the tunnel front advance, as well as the transformation uncertainty related to the use of indirect monitoring information. The established threshold is discussed in the context of the observational method. 

Place, publisher, year, edition, pages
Informa UK Limited , 2023. Vol. 17, no 2, p. 361-375
Keywords [en]
Bayesian methods, probabilistic methods in rock mechanics, reliability-based design, Tunnelling
National Category
Geotechnical Engineering and Engineering Geology
Identifiers
URN: urn:nbn:se:kth:diva-321876DOI: 10.1080/17499518.2022.2046789ISI: 000766520300001Scopus ID: 2-s2.0-85126234702OAI: oai:DiVA.org:kth-321876DiVA, id: diva2:1713520
Note

QC 20221125

Available from: 2022-11-25 Created: 2022-11-25 Last updated: 2025-02-07Bibliographically approved

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Spross, JohanJohansson, Fredrik

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Soil and Rock Mechanics
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Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards
Geotechnical Engineering and Engineering Geology

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