Investigation of shear band strengthening by using different strengthening criteria

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4. Investigation of shear band strengthening by using different strengthening criteria

To prevent a critical failure mechanism, it is possible to simply strengthen the potential shear bands, which is a patented
idea. The localization of potential shear bands that are most likely to form shear can be calculated. Before these shear
bands can appear, they can be strengthened by injecting a cement suspension or using jet grouting at the locations where
the most likely shear bands would occur. As a result, it is possible to increase the bearing capacity of the geotechnical
system by focusing solely on the shear bands that are moste likely to form, minimizing the use of materials. Numerical
modeling is employed to analyze the increase in bearing capacity. Four criteria for strengthening the shear bands are
applied by incorporating them into a hypoplastic soil model, taking into consideration the material transition from soil to
cement, as well as intermediate materials that can arise from jet grouting, which are mixtures of soil and cement. Two
fundamental geotechnical systems, namely a shallow foundation and a retaining wall, are analyzed using
ABAQUS/Standard for finite element analysis. The results demonstrate the potential of numerical modeling to identify
the most critical localized areas in the soil that require strengthening, as well as the substantial increase in bearing capacity
achieved after reinforcing the identified areas.

8th International Symposium on Deformation Characteristics of Geomaterials (ISDCG2023)

II.6) Soil stabilisation and improvement