BGS GeoSure shrink-swell subsurface

BGS GeoSure shrink-swell subsurface sample

BGS GeoSure shrink-swell subsurface coverage.

Scale 1:625 000
Coverage Great Britain
Format GIS polygon data (ESRI, MapInfo; others available by request).
Price Delivered as part of the GeoSure data suite

The shrink-swell subsurface dataset is a single data layer that identifies areas of potential shrink-swell hazard which are underneath another solid formation and therefore hidden from the surface. It provides an indication of the presence of shrink swell prone clays beneath other deposits (superficial or bedrock), down to a depth of c. 10 metres.

Swelling clays can change volume due to variation in moisture, which can cause ground movement that may affect many foundations. Ground moisture variations may be related to a number of factors, including weather variations, vegetation effects (particularly growth or removal of trees) and the activities of people that might cause changes to the ground conditions. Such changes can affect building foundations, pipes or services. During deeper excavation and construction works (e.g. basement excavations, tunnels or utility corridors), these volume changes might also affect clay shrink-swell prone lithologies.

These hazards may also impact on anyone involved in the construction of large structures (deep foundations, basements), infrastructure networks (road or rail) or utility companies.

The data have been produced by geologists, geotechnical specialists and information developers at the BGS, and has been derived from the UK3D 3D geological model for the United Kingdom.

BGS GeoSure shrink–swell subsurface is part of the BGS GeoSure range of natural subsidence products.


Contact Digital Data for more information.

Hutton field: well correlation diagram.