Cristin-resultat-ID: 967062
Sist endret: 15. februar 2013, 12:48
NVI-rapporteringsår: 2013
Resultat
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2013

Numerical analysis of effects of weakness zones on tunnel stability - 2D versus 3D

Bidragsytere:
  • Dawei Mao og
  • Bjørn Nilsen

Bok

Advances in Underground Space Developmnet
ISBN:
  • 978-981-07-3756-6

Utgiver

Research Publishing Services
NVI-nivå 1

Om resultatet

Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Publiseringsår: 2013
Sider: 388 - 398
ISBN:
  • 978-981-07-3756-6

Klassifisering

Fagfelt (NPI)

Fagfelt: Geovitenskap
- Fagområde: Realfag og teknologi

Beskrivelse Beskrivelse

Tittel

Numerical analysis of effects of weakness zones on tunnel stability - 2D versus 3D

Sammendrag

Numerical simulation is a powerful tool in rock engineering planning and design, particularly when difficulties and uncertainties are expected in underground excavation. For tunneling through major weakness zones or faults where the geometry is complex, three-dimensional programs have been widely applied. Two-dimensional programs are fast and very convenient to use, but simulation results may considerably deviate from reality if a two-dimensional program is improperly used. This is discussed in the paper based on two popular used numerical programs in rock engineering, Phase2 and FLAC3D. Scenarios with varied widths of weakness zone, different sets of ratios of horizontal stresses to vertical stress and different strengths of weakness zones have been assumed in the analysis. Areas of yielded zones and vertical displacements at the crown and invert are compared, and deviation in simulation results illustrated. It is concluded that for analyzing the effects of a weakness zone perpendicular to the tunnel alignment, the thickness of the zone has to be much wider than the tunnel span for Phase2 to be realistically used. This is, however, quite unusual for “normal” tunnel excavation spans. In addition, it is difficult to define the deformation before the installation of rock support when using Phase2 for tunneling through weakness zones.

Bidragsytere

Dawei Mao

  • Tilknyttet:
    Forfatter
    ved Infrastruktur ved SINTEF AS
  • Tilknyttet:
    Forfatter
    ved Institutt for geovitenskap og petroleum ved Norges teknisk-naturvitenskapelige universitet

Bjørn Nilsen

  • Tilknyttet:
    Forfatter
    ved Institutt for geovitenskap og petroleum ved Norges teknisk-naturvitenskapelige universitet
1 - 2 av 2

Resultatet er en del av Resultatet er en del av

Advances in Underground Space Developmnet.

Zhou, Yingxin; Cai, Jungang; Sterling, Raymond. 2013, Research Publishing Services. SINGAPORE, LTUVitenskapelig antologi/Konferanseserie
1 - 1 av 1