Numerical simulation of vibrocompaction based on CEL approach
European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE 2019)
Contribution to Conference
A numerical model is set up to simulate the densification of dry sand using the vibrocompaction method. This compaction method includes densification of loose sands by means of shear deformation processes imparted by horizontal vibrations of vibrator probe at the required soil depth. A cylindrical stay-tube and vibrator probe assembly are numerically modelled in the centre of cylindrical sand domain of 40 m depth based on the CEL approach. At the beginning of the deep vibration compaction simulation process the vibrator is simulated wished in place at a penetration depth of 20 m. The compaction process between 20 to 10 m depth, is modelled based on the pilgrim step method similar to the compaction procedure followed on field. A hypoplastic constitutive model is used to characterize the stress-strain behaviour of the sand. The effect of saturation of sand layer, shape of the vibrator and spacing of the compaction points on extent and degree of compaction is studied.