Comparison of analytical method, 3D finite element model with experimental subsidence measurements resulting from the extension of the Milan underground
Articolo
Data di Pubblicazione:
2009
Citazione:
Comparison of analytical method, 3D finite element model with experimental subsidence measurements resulting from the extension of the Milan underground / M. Migliazza, M. Chiorboli, G.P. Giani. - In: COMPUTERS AND GEOTECHNICS. - ISSN 0266-352X. - 36:1/2(2009), pp. 113-124.
Abstract:
The construction of shallow tunnels induces a state of strain in the soil around the excavation that could
cause damaging differential displacements in existing structures near the tunnel. In the last decades several
empirical, analytical and numerical approaches have been presented by different authors in the scientific
literature with a purpose toward estimating maximum surface displacements along the tunnel
axis and the surface-area extension affected by deformation phenomena. This paper reports the results
of a study carried out to estimate the values of the surface settlements induced by the excavation (with
an EPB-S shield machine) of the new extension of line 1 of the Metropolitana Milanese, constructed in an
alluvial sandy area of the Padana Plain. In particular, the purpose of this study has been to compare the
vertical surface displacements monitored during the advancing excavation to the settlements estimated
by using analytical and empirical formulations and by setting up a three-dimensional finite element
model that could simulate, step by step, the different tunnel excavation and supporting phases.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
3D numerical modelling; EPB; FEM; Settlements; Shallow tunnel
Elenco autori:
M. Migliazza, M. Chiorboli, G.P. Giani
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