Cavity probing is a process to determine the presence or absence of cavities in rock formations under proposed structures. The nature and extent of the cavities when present are also determined and measures are adopted to ensure that structures built on top of the sub-surface formations will be safe and free from any structural damage due to settlement or collapse of the sub-surface formations.
This technique involves the injection of a fluid grout into granular, fissured or fractured ground to produce a solidified mass to carry increased load and/or fill voids and fissures to improve load-bearing capacity of the soils.
