Modelling the influence of rock variability on geotechnical structures

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Title: Modelling the influence of rock variability on geotechnical structures
Authors: Goncalves Pedro, AM
Ferreira, D
Coelho, PALF
Almeida e Sousa, J
Taborda, DMG
Item Type: Conference Paper
Abstract: The importance of variability in soils and rocks has been widely acknowledged and the object of numerous studies. In this paper, the impact of modelling rock variability is assessed by performing numerical analysis of the excavation of a deep circular tunnel in a rock mass characterised by a uniform and isotropic stress state. The variability is introduced in the analyses by considering random fields of variable parameters generated using the Local Average Subdivision (LAS) method. The results of the performed analyses are compared against the results of a traditional deterministic approach where uniform properties are considered, both in terms of displacements around the excavation and forces in the tunnel lining, so that the influence of introducing variability can be assessed. Finally, a parametric study is carried out in order to evaluate the influence of the parameters adopted in the generation of random fields, such as the standard deviation, the spatial correlation distance and the ratio of anisotropy.
Issue Date: 17-Sep-2017
Date of Acceptance: 5-May-2017
Publisher: ICSMGE
Journal / Book Title: Proceedings of the 19th International Conference on Soil Mechanics and Geotechnical Engineering, Seoul 2017
Copyright Statement: © 2017 ICSMGE
Conference Name: 19th International Conference on Soil Mechanics and Geotechnical Engineering
Start Date: 2017-09-17
Finish Date: 2017-09-22
Conference Place: Seoul
Open Access location:
Appears in Collections:Civil and Environmental Engineering

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