A vibrator hung from a crane is lowered into the ground with penetration usually helped by water jetting. The energy from the vibration reduces the inter-granular forces between the soil particles, making them denser as the vibrator is raised in lifts. Sand backfill is then poured in from ground level to compensate for any decrease in soil volumes. More backfill is added and compacted and the vibrator is gradually removed until it has built up to ground level.
Vibro rigs can be fully instrumented with an on-board data acquisition system. Data from the system, such as amperage and lift rate, can then be recorded and displayed in real-time on an in-cab monitor. The production data can also be monitored from any Keller office by installing a mobile sim in the data recorder.
