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Título del libro: Assessment Of Lining Performance Of Tunnels Built In Cemented Fine-Grained Stiff Soils

Autores UNAM:
JUAN MANUEL MAYORAL VILLA;
Autores externos:

Idioma:
Inglés
Año de publicación:
2016
Palabras clave:

Linings; Office buildings; Damage criteria; Finite difference model; Ground settlement; Interaction diagram; Internal forces; Rational design; Secondary lining; Tunnel construction; Tunnel linings


Resumen:

This paper presents a numerical study regarding the loads, and the corresponding damage, taken by the primary and secondary lining of a tunnel built in cemented fine-grained stiff soils. This study aims at establishing more rational design criteria that take into account explicity the lining performance. A 3.5 km long tunnel to be built in a densely populated northwest area of Mexico City, was considered as case study. Series of three-dimensional finite difference models, developed with FLAC3D, were used to simulate the tunnel construction, and to compute the ground settlements, internal forces, bending moments, and displacements acting both on the primary and secondary tunnel linings. Interaction diagrams were used to study the lining performance. Several advancement lengths, and tunnel covers were considered to establish their impact on the loads transferred to the tunnel lining. A practice-oriented damage criterion for tunnels was proposed based on the interaction diagram analysis.


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