Numerical modelling of drained and undrained cone penetration tests
Numerical modelling of drained and undrained cone penetration tests
The Cone Penetration Test (CPT) is a widely used in-situ test in geotechnical engineering because of its efficient application, continuous collection of multiple measurements, and repeatability. CPT results are affected by the soil drainage conditions around the cone. For intermediate particle size soils such as silts and tailings, interpretation of CPT results is challenging as partial drainage results in tip resistance and pore pressures in between fully drained and fully undrained conditions. Modelling the two extremes of drained and undrained cone penetration is the first key step of analysing whole drainage range of CPT. In this paper, drained and undrained CPT were simulated in Abaqus. The critical state based model, NorSand, was implemented as user subroutine VUMAT into Abaqus/Explicit. The Arbitrary Lagrangian Eulerian (ALE) scheme available in Abaqus/Explicit was utilized to prevent mesh distortions around the cone. The drained simulation results were validated against existing calibration chamber data on tailings. The pore water pressures in undrained conditions were computed and the effect of the drainage conditions on tip resistance and sleeve friction were discussed.
Xingyi Wu; Mason Ghafghazi; Zhenyu Liu; Yinghui Tian; Shiao Huey Chow
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/NUMGE2023-143
Contact Information
- Secretary General - Dr A M McNamara
- Email: [email protected]
- Phone: +44 20 7040 8154
- City, University of London
- Northampton Square
- London EC1V 0HB. United Kingdom