Concept example
Helix Tower Substructure
A basement for a new tower, dug beside occupied buildings, with ground movement read every day.
What we built
A secant piled wall round the site, then the basement dig inside it, then a raft foundation for the tower.
The hard part
Neighbours stayed in their buildings the whole time. Their walls could not move.
How we did it
Monitoring points on the next-door buildings were read every day. If a reading moved, the dig stopped until the engineer said go.