0026776 - ÚTAM 2010 RIV GB eng C - Conference Paper (international conference)
Mašín, David - Herle, Ivo
Numerical analyses of a tunnel in London clay using different constitutive models.
[Numerické analýzy tunelu v londýnském jílu s využitím různých konstitučních modelů.]
Geotechnical aspects of underground construction in soft ground. London: Taylor & Francis/Balkema, 2005 - (Bakker, K.; Bezuijen, A.; Broere, W.; Kwast, E.), s. 595-600. ISBN 0415391245.
[Conference of TC28 of the ISSMGE /5./. Amsterdam (NL), 15.06.2005-17.06.2005]
Grant - others:Evropská komise(XE) SSPI-CT-2003-501837
Institutional research plan: CEZ:AV0Z20710524
Keywords : numerical modelling * constitutive models * clay
Subject RIV: JM - Building Engineering

The paper presents results of FE simulations of the Heathrow Express trial tunnel in London clay. The influence of constitutive equations on numerical predictions is evaluated and compared with field observations. The equations include two traditional models (Mohr-Coulomb, Modified Cam-Clay) and four models of different complexity (isotropic and anisotropic nonlinear elasticity with perfect plasticity, combined isotropic and kinematic hardening plasticity, and hypoplasticity). Nonlinear elasticity and hypoplasticity with intergranular strains come close to the observed behaviour whereas other models give non–realistic predictions due to an unsatisfactory behaviour in the small strain region.

Porovnání předpovědi konstitučních modelů založených na rozdílných matematických základech pomocí předpovědi skutečné geotechnické konstrukce, a to zkušebního tunelu pro Heathrow expres v Londýně.
Permanent Link: http://hdl.handle.net/11104/0116958