Abstract
The vacuum preloading method combined PVDs has been widely used to improve the engineering properties of dredged marine clay. Comparing with the surcharge preloading method, the vacuum preloading method has no stability problems. However, it is found in the field test that the improved soil still has further settlement after unloading the vacuum pressure. To investigate the mechanism of the vacuum preloading process, series of triaxial tests were conducted to simulate the vacuum preloading process for dredged clay. The compressibility of the clay under different stress paths was measured. It is found in this paper that the deformation of dredged clay after unloading of the vacuum pressure includes two parts: one is the elastic deformation caused by the unloaded instant soil, and the other is the plastic shear deformation produced by the soil under the partial stress state. When partial stress keeps constant, the larger stress ratio induces larger deformation.
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Sun, L., Zhuang, D., Yan, S. (2018). Simulation of the Vacuum Preloading Process on Dredged Clay by Triaxial Test. In: Zhou, A., Tao, J., Gu, X., Hu, L. (eds) Proceedings of GeoShanghai 2018 International Conference: Fundamentals of Soil Behaviours. GSIC 2018. Springer, Singapore. https://doi.org/10.1007/978-981-13-0125-4_57
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DOI: https://doi.org/10.1007/978-981-13-0125-4_57
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