Abstract (EN):
The influence of the consolidation on a
strutted excavation in soft soil is analysed using
a computer code based on the finite element method.
A base jet-grout slab is considered in order to improve
stability against bottom heave failure and minimize wall
displacements. The numerical model incorporates the
Biot consolidation theory (coupled formulation of the
flow and equilibrium equations) with soil constitutive
relations simulated by the p¿q¿h critical state model.
Special emphasis is given to the analysis, during and
after the construction period, of the pore pressures, shear
stresses, stress levels and displacements in the ground,
as well as strut compression loads, wall displacements
and bending moments, earth pressures on the wall faces
and compression loads and bending moments on the jetgroutslab.
The safety factor against bottom heave is also
evaluated from the finite element analysis considering
formulations of the critical state soil mechanics, and also
compared to values obtained with traditional methods
that use limit equilibrium approach and bearing capacity
fundamentals.
Idioma:
Inglês
Tipo (Avaliação Docente):
Científica
Nº de páginas:
23