In order to minimise the volume of excavation material removed from site and the use of grout material to fill voids discovered by survey on and within the vicinity of the site, laser scanning technology was employed by the company to determine the precise depths.
This involved lowering a 360 degree laser scanner into the void, attached to a tripod at ground level. The scanner then produces a set of 3D images so the site team could physically see the void and whether it was isolated or contained any tunnels or openings.
Without this information, the site would have required a 24 tonne excavator for an unknown period of time as well as an attending banksman to determine the depth of voids through excavation. This would have also necessitated the removal of an additional least 60 tonnes of material off-site.
Entry submitted by Robertson Construction
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