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Analysis of tunnel-induced settlement damage to surface structures Analyse des dgts crs par tunnels sur les constructions en surface
 

Summary: Analysis of tunnel-induced settlement damage to surface structures
Analyse des dégâts créés par tunnels sur les constructions en surface
G.T. Houlsby, H.J. Burd & C.E. Augarde
Department of Engineering Science, Oxford University, U.K.
Keywords: analysis, finite elements, masonry structures, settlement, tunnelling
ABSTRACT: Transport developments in cities often involve tunnelling, which inevitably leads to
ground movements. These must be carefully predicted if there is a risk of settlement damage to
nearby structures. Tunnel-induced settlements may be predicted empirically for greenfield sites, but
surface structures modify these movements. Two-dimensional models, often used in practice,
neglect the effect of transients as the tunnel is excavated, and do not allow realistic models of
buildings. Research on a 3-D numerical model of tunnelling is described. This includes a building
and a simulation of tunnel construction processes. Interactions between the building and the ground
are investigated. Settlement, and structural damage, is studied as the tunnel installation proceeds.
An analysis of a building unsymmetrical in plan to the tunnelling direction is presented.
RÉSUMÉ: Le développement des transports implique souvent la construction de tunnels qui
entraine des mouvements du sol. Ceux-ci doivent être prédits en cas de risque de dégâts sur les
contructions avoisinantes. Les effets peuvent être présdits empiriquement pour des terrains vierges
mais la présence de constructions en surface modifie ces mouvements. Les modèles 2D, négligent
les effets transitoires dus à la periode d'excavation du tunnel. Les recherches sur un modèle
numérique 3D sont décrites. Elles comprennent la prise en compte d'un batiment et une simulation

  

Source: Augarde, Charles - School of Engineering, University of Durham

 

Collections: Engineering