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Numerical shear band strengthening with contact modelling for the increase of load capacity of geotechnical structures
Publikationstyp
Conference Paper
Date Issued
2024-07-11
Sprache
English
First published in
Number in series
395
Start Page
2215
End Page
2227
Citation
5th International Conference on Geotechnics for Sustainable Infrastructure Development, GEOTEC 2023
Contribution to Conference
Publisher DOI
Scopus ID
Publisher
Springer
ISBN
9789819997213
Geotechnical constructions often fail due to a localized shear failure. Shear zones are formed in the soil as a result of external loads. To increase the load bearing capacity of geotechnical constructions and to prevent a critical failure mechanism, it is possible to only strengthen the potential shear bands by injecting cement in the beginning of the potential shear bands. This local strengthening makes it possible to increase the load bearing capacity of constructions with a minimum use of material. The soil strengthening is numerically modelled for a strip foundation using FEM and implementing different strengthening criteria within a hypoplastic soil model which considers material transition from sand to strengthened soil. The necessity of realistic contact modelling is shown, and the results both with and without contact modelling are shown. The numerical results show a significant increase in the load bearing capacity compared to the results without shear band strengthening.
Subjects
Ground improvement
Numerical analysis
Shear band strengthening
Strip foundation
DDC Class
624.15: Geotechnical Engineering