High-powered, probe-type vibrator. Photograph from FHWA NHI-06-019 (Elias et al., 2006) courtesy of FHWA

Vibrocompaction densifies deep cohesionless soils through penetration and vibration of a probe inserted into the ground. Advantages include lower cost and faster construction and extensive applications. This technique is applicable to new embankments on unstable soils and roadway construction and widening.