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Modelling of the Response of Partially Saturated Non-cohesive Soil Subjected to Undrained Loading

Świdziński W., Mierczyński J., Smyczyński M.

Archives of Hydro-Engineering and Environmental Mechanics

2018

Vol. 65, nr 1

11--29

The paper deals with the modelling of the undrained response of non-cohesive partially saturated soils subjected to triaxial compression. The model proposed is based on an incremental equation describing the pre-failure response of non-cohesive soils during shearing. The original model, developed by Sawicki, was modified by taking into account pore fluid compressibility. The governing equation makes it possible to simulate effective stress paths under undrained conditions. Numerical results are compared with experimental data.

Response of Partially Saturated Non-cohesive Soils

Świdziński W., Mierczyński J., Mikos A.

Archives of Hydro-Engineering and Environmental Mechanics

2017

Vol. 64, nr 3-4

187--207

This paper analyses and discusses experimental results of undrained triaxial tests. The tests were performed on non-cohesive partially saturated soil samples subjected to monotonic and cyclic loading. The tests were aimed at determining the influence of saturation degree on soil’s undrained response (shear strength, excess pore pressure generation). The saturation of samples was monitored by checking Skempton’s parameter B. Additionally, seismic P-wave velocity measurements were carried out on samples characterized by various degrees of saturation. The tests clearly showed that liquefaction may also take place in non-cohesive soils that are not fully saturated and that the liquefaction potential of such soils strongly depends on the B parameter.