1995 – Stabilising Stone Mines

Combe Down, Bath

Click image to enlarge.

In 1988-89 open-cast quarries and shallow stone mines at The Brow were investigated by trenching and rock probing for several large detached houses.  Successful stabilisation was achieved by jack-hammering out the thin roof cover, crushing the rocky spoil and consolidating with vibro-replacement stone columns.  Raft foundations were subsequently adopted.

Ref: GG Thomas (1987) Cost Benefit Analysis for Stabilising Shallow Bath Stone Mines.