Evolution of Undrained Strength Under a Test Embankment
Paper in proceedings, 2021

Increased traffic and environmental loads necessitate re-evaluation of the stability of existing road and railway embankments built on soft sensitive clays. Thus, the current mobilised undrained shear strength needs to be quantified. A methodology to evaluate changes in undrained shear strength under embankment loading is developed and applied for the case of Haarajoki test embankment. The methodology combines boundary value modelling of embankment loading with integration point level stress path probing using the Creep-SCLAY1S model. The changes in the stress state and the relevant state parameters resulting from the boundary value modelling enable the quantification of the mobilised undrained shear strength. The results indicate an increase in the undrained shear strength up to 17% in the most affected clay layer. The high pre-overburden pressure in the top of clay deposit prevents significant changes in the undrained shear strength in the case of Haarajoki. Thus, when assessing changes in the undrained shear strength, one of main parameters to determine is the initial preconsolidation pressure.

Soft sensitive clay

Undrained shear strength

Creep-SCLAY1S

Author

Hannes Hernvall

Chalmers, Architecture and Civil Engineering, GeoEngineering

Mats Karlsson

Chalmers, Architecture and Civil Engineering, GeoEngineering

Jelke Dijkstra

Chalmers, Architecture and Civil Engineering, GeoEngineering

Minna Karstunen

Chalmers, Architecture and Civil Engineering, GeoEngineering

Lecture Notes in Civil Engineering

23662557 (ISSN) 23662565 (eISSN)

Vol. 125 707-714

16th International Conference of the International Association for Computer Methods and Advances in Geomechanics, IACMAG 2021
Turin, Italy,

Subject Categories

Applied Mechanics

Geotechnical Engineering

Other Materials Engineering

DOI

10.1007/978-3-030-64514-4_74

More information

Latest update

3/25/2021