The effects of partial drainage on the interpretation of pore pressure dissipation test data: a numerical study
The effects of partial drainage on the interpretation of pore pressure dissipation test data: a numerical study
Partial drainage may occur during cone penetration in intermediate soils, which could complicate the subsequent interpretation of pore pressure dissipation test data. This study adopted the Press-Replace Method (PRM), coupled with consolidation analysis, to numerically simulate the entire process of cone penetration under partially drained conditions, followed by the dissipation test after the cone has reached the desired depth. The excess pore pressure responses at different points in the soil during the partially drained penetration process were examined and compared with published solutions. The decay of the excess pore pressures during the post-penetration dissipation phase following different cone penetration rates were also examined, and the results were compared with published results obtained from centrifuge testing. In particular, the effects of partial drainage arising from different cone penetration rates on the time taken for 50% excess pore pressure dissipation (t50) were studied, and a trend was proposed. Finally, a preliminary assessment between t50 with partial consolidation, due to drainage, was illustrated and validated with similar soil types.
Ryan Chia; Ze Zhou Wang; Siang Huat Goh
10th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE2023)
2. Finite element, finite difference, discrete element, material point and other methods
https://doi.org/10.53243/NUMGE2023-237
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