Abstract
Due to their low consistency and colloidal aspect, there have been many methods to determine the undrained shear strength \( \varvec{c}_{\varvec{u}} \) of soft clays. Aiming at meaningful method for \( \varvec{c}_{\varvec{u}} \) determination, a new method is suggested. In this work, focus is given on the vane shear test; one of the in situ test especially developed for preserving the soil structure and avoiding its disturbance to proceed for the determination of \( \varvec{ c}_{\varvec{u}} \). Precisely, the purpose was to discuss the credibility of the usually used method to calculate the undrained shear strength from in situ vane shear test and to confirm Bouassida proposed method (Proceedings of the 12th African Regional Conference on Soil Mechanics and Geotechnical Engineering. Durban, South Africa, pp. 285–291, 1999). Data of in situ vane shear tests conducted on Gothenburg, Tunis and Le Havre soft clays were compiled to compare between cu estimations by different methods of determination. Furthermore, the determination of \( \varvec{c}_{\varvec{u}} \) from existing correlations was considered, to discuss the suitable value of undrained shear strength of soft clays.
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Acknowledgements
The authors address sincere thanks to Goran Sallfors for his help and kind cooperation. His help was very crucial and gave much value to this study.
The help provided by the “Hydrogeotechnique” and Cerema Company (France) is also appreciated by the authors.
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Bouassida, M., Azaiez, D. (2019). On the Determination of Undrained Shear Strength from Vane Test. In: Chen, D., Kim, S., Tapase, A. (eds) Advancements on Sustainable Civil Infrastructures. GeoChina 2018. Sustainable Civil Infrastructures. Springer, Cham. https://doi.org/10.1007/978-3-319-96241-2_5
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