Title:
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HMC analysis of a tunnel in swelling rock
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Author:
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Berdugo de Moya, Iván Rafael; Guimarães, Leonardo do N; Gens Solé, Antonio; Alonso Pérez de Agreda, Eduardo
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria del Terreny, Cartogràfica i Geofísica; Universitat Politècnica de Catalunya. MSR - Mecànica del Sòls i de les Roques |
Abstract:
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The phenomenon of swelling in tunnels excavated through sulphate-bearing rock is
quite frequent in some geological formations. The paper describes the case of the Lilla tunnel excavated in anhydritic-gypsiferous of Eocene age. Very large swelling displacements were observed affecting the first few meters below the tunnel inverts. In the paper, a fully coupled hydro-mechanical and chemical analysis is presented that takes into account the dissolution and precipitation of the anhydrite-gypsum chemical system and their associated hydraulic and mechanical effects. The analysis provide a better understanding of the swelling ground phenomena and offer a firmer foundation
for taking engineering decisions concerning mitigating measures. |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Túnels i excavacions -Tunnels--Spain -Tunnelling in sulphate bearing rock -swelling rock -hydro-mechanical and chemical (HMC) formulation -numerical analysis -geochemistry -Túnels -- Espanya |
Rights:
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Document type:
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Article - Published version Conference Object |
Published by:
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AEDIFICATIO PUBLISHERS
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