Numerical analyses of an experimental excavation supported by panels of lime-cement columns
Journal article, 2020

The influence of ground improvement with panels of overlapping lime-cement columns on the behavior of a braced excavation loaded to failure has been investigated using 3D numerical analyses and the results are compared with an experimental full-scale failure test. The analyses reveal that stress-induced strength anisotropy of lime-cement improved clay needs to be considered when the stress path for the actual field conditions differs from that in conventional laboratory testing. In addition to strength parameters, the modulus of deformation that is consistent with the actual encountered stress path is also needed for reasonable predictions.

Deep mixing columns

Strength anisotropy

Finite element analyses

Deep excavation

Author

Razvan Ignat

Royal Institute of Technology (KTH)

Sadek Baker

Skanska

Minna Karstunen

Chalmers, Architecture and Civil Engineering, GeoEngineering

Sven Liedberg

Skanska

Stefan Larsson

Royal Institute of Technology (KTH)

Computers and Geotechnics

0266-352X (ISSN)

Vol. 118 103296

Subject Categories

Mineral and Mine Engineering

Applied Mechanics

Geotechnical Engineering

DOI

10.1016/j.compgeo.2019.103296

More information

Latest update

12/16/2019