Patent ID: 7661907

Claim:
A method of modifying geotechnically unsuitable soils at a site so as to render the site capable of load bearing, said method comprising the following steps: (a) excavating a volume of soil from the site, to a pre-determined depth, thereby exposing a base of the excavated site; (b) applying an in situ soil stabilisation treatment to the base of the excavated site exposed in step (a); (c) applying a soil stabilisation treatment to the volume of soil excavated from the site in step (a); (d) applying rolling dynamic compaction to the base of the excavated site exposed in step (a); (e) re-introducing into the excavated site a portion of the treated soil from step (c) so as to form a layer of pre-determined thickness; (f) applying compaction to the layer formed in step (e); (g) iterating steps (e) and (f) to form a compound layer of pre-determined thickness; (h) applying rolling dynamic compaction to the compound layer formed in step (g); and (j) iterating steps (e) to (h) so as substantially to backfill the site to a pre-determined level; and wherein in the soil stabilisation treatment in step (b), the base is over-dried such that the base layer then acts as a capillary to absorb any moisture generated during step (d).