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Investigation of the instalation process of a diaphragm wall trench


Institute of Geotechnical Engineering, University of Stuttgart

Man-made fills, holocene clay- and peat layers as well as pleistocene sand and pleistocene layers of sand, loam, clay and peat.

Scope of work:

  • Three-dimensional Finite Element analyses on the deformation during instalation of a diaphragm wall trench
  • Investigation on the influence of different approaches for the fresh concrete pressure
  • Comparative analyses on the stability of a diaphragm wall trench (two-dimensional (plane strain), axisymmetric and three-dimensional Finite Element analyses)

Used Finite Element Code:
PLAXIS 3D Foundations V2.1

Used constitutive laws:
Linear elasticity (generalized Hooke)
Hardening-Soil model (elasto-plastic)

Typical domain size:

2D model for Phi-c reduction:
40 m  x  60 m
6,099 triangular elements
with quadratic interpolation
12,376 nodes

3D model for Phi-c reduction:
25 m  x  30 m  x  60 m
62,100 wedge elements
with quadratic interpolation
164,500 nodes





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