In 2010, the University of Hertfordshire wished to extend and refurbish Hutton Hall, one of its existing campus buildings. Anecdotal evidence indicated that during the construction of the original building a number of voids were encountered, some of which suffered from collapse and had been backfilled with rubble.
A geophysical survey was required to assess the potential for voids from historical chalk mines beneath the surface of the university campus. RSK undertook a high-resolution microgravity and electrical resistivity imaging survey in the area surrounding the building and within the footprint of the building itself.
Read more by downloading the pdf below