Encountering obstructions during piling works and clearing these obstructions can cause significant cost implications and also impact upon the construction programme. However, delays and significant cost-overuns can be avoided by completing a quick and easy pile probing survey.
We recently carried out a pile probing exercise a high profile redevelopment project in central London. The principal contractor identified an old, below-ground fuel tank that needed to be removed. Due to adverse ground conditions and proximity to a basement and the adjacent road, sheet piling around the tank prior to its removal was considered the most effective and safest option.
We were brought in prior to the piling rig to identify an obstruction free boundary around the tank to allow the piling to be undertaken. We completed 400m+ of probing in two days using our Geoprobe drill rig, completing the works on budget and ahead of schedule.
Additionally, despite the working area having been surveyed and declared “service-free” by the principal contractor our drill team, who are all trained in service detection, identified a 4″ water main in our specified working area during our pre-enabling The findings from our probing allowed the pile design to be refined and the service clearance works we carried out avoided everyone from getting very wet.
Contract value: <£10k
See also: Mayfair Hotel