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Memorias de investigación
Artículos en revistas:
A tunnel face failure mechanism for layered ground, considering the possibility of partial collapse
Año:2015
Áreas de investigación
  • Ingenieria civil
Datos
Descripción
A recent rotational face collapse mechanism is extended to compute critical pressures, in the context of the upper-bound limit analysis, for tunnels in layered (or stratified) ground. The mechanism can consider both (i) cases in which contacts between layers intersect the tunnel face; and (ii) cases in which they are located above the tunnel crown. In addition, the mechanism is extended to address partial collapse in a two-layered ground (with a softer-top and a stronger-bottom), without the need to scale mechanisms that were derived for global collapse. A 3D numerical model is employed to validate the predictions of the limit analysis mechanism, demonstrating that it provides, with a significantly reduced computational effort, good predictions of critical pressure, of the type of collapse (global or partial), and of its geometry. The mechanism is then employed to conduct parametric studies of the influence of several geometrical and mechanical parameters on face instability, considering the possibility of partial collapse, of tunnels in layered soils. Results show that a weak material in the upper section of the tunnel face can lead to a significant increase of the collapse pressure; it also makes a partial collapse possible. They also show that, when partial collapse is not critical and a constant face pressure is considered, the lower layer has a stronger influence on the computed values of collapse pressure. Finally, the results of the proposed mechanism are compared to a recent limit analysis solution for layered soils.
Internacional
Si
JCR del ISI
Si
Título de la revista
Tunnelling And Underground Space Technology
ISSN
0886-7798
Factor de impacto JCR
1,589
Información de impacto
Datos JCR del año 2013
Volumen
47
DOI
10.1016/j.tust.2014.12.014
Número de revista
Desde la página
182
Hasta la página
192
Mes
SIN MES
Ranking
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Salvador Senent Dominguez (UPM)
  • Autor: Rafael Jimenez Rodriguez (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Mecánica de Rocas
  • Departamento: Ingeniería y Morfología del Terreno
  • Departamento: Ingeniería Civil: Hidráulica y Ordenación del Territorio
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