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Title: Study of the unexpected collapse of the Ampurdán tunnel (Spain) using a finite elements model
Authors: Alija, S. 
Torrijo, F. J. 
Quinta-Ferreira, Mário 
Keywords: Tunnel collapse; Softrock; Claystone; Finite element method
Issue Date: 2014
Publisher: Springer
Citation: Alija, S., Torrijo, F.J. & Quinta-Ferreira, M. Study of the unexpected collapse of the Ampurdán tunnel (Spain) using a finite elements model. Bull Eng Geol Environ (2014) 73: 451. doi:10.1007/s10064-013-0534-z
Project: Portuguese Government through FCT—Fundação para a Ciência e a Tecnologia under the project PEst-OE/CTE/UI0073/2011 of the Geosciences Center 
Serial title, monograph or event: Bulletin of Engineering Geology and the Environment
Volume: 73
Issue: 2
Abstract: This paper presents the case study of the Ampurdán tunnel that suffered an unexpected partial collapse during construction due to the weathering of the claystone groundmass after excavation and wetting by infiltration water. To overcome the problems encountered, a finite elements model was used to understand the behaviour of the tunnel and surrounding ground to determine the geotechnical properties that lead to failure, allowing engineers to choose suitable procedures for the construction of the tunnel. The parametric study performed simulated the deformations measured in situ and related to the tunnel collapse. The geotechnical parameters used for the weathered claystone, when compared with the intact portion, correspond to a wide range of reductions between 8 % in the apparent density and in the effective friction angle, up to 40 % in the effective cohesion and 56 % in the Young modulus.
Other Identifiers: 10.1007/s10064-013-0534-z
DOI: 10.1007/s10064-013-0534-z
Rights: openAccess
Appears in Collections:FCTUC Ciências da Terra - Artigos em Revistas Internacionais

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