Ground Improvement - Stone Columns

Vibro displacement stone columns are constructed through weak soils to improve their load bearing and settlement characteristics. This ground improvement technique is an economic and technically sound solution to a wide range of foundation problems.

The construction process involves introducing a vibrator to penetrate to the design depth and the resulting cavity is filled with hard inert stone. The vibrator is then used to force the stone into the surrounding ground, creating confined pressure and columns of support.

Stone columns can also be effectively utilized as a liquefaction mitigation control measure, whereby they not only density the soils to provide improved bearing capacity, but also act as a pathway for the dispersion of pore water pressures developed in an earthquake loading situation.

The stone column layout can be designed to suit combinations of different loads, soil types and required settlement performance.