This structure was a private pool/ concrete groundworks in the remote grounds of Snitterton Hall, Matlock, Derbyshire.
The excavation relied on the integrity of the ground rock at one end of the dig which was about 8 meters deep and a sheet-piling/ waling system at the other end, where a public road was situated mainly servicing agricultural traffic.
Due to a prediction of uplift from ground water the concrete box was anchored with tension piles which bolted onto the RC thickenings within the base slab. While the structure was quite simple the different layers of waterproofing and insulation were complex in application and needed to be signed off at every stage by representatives from each supplier. This was a strict QA requirement prior to any placement of concrete or back-filing of walls.