Collapsible
deposits — Property Hazard Information
Some types of ground, can collapse when a load (such as a building or road traffic)
is placed on them and when they become saturated. Such collapse may
cause damage to overlying property.
Compressible
ground — Property Hazard Information
Some types of ground, can contain layers of very soft materials like clay or peat.
These may compress if loaded by overlying structures, or if the groundwater level
changes, potentially resulting in depression of the ground and disturbance of
foundations.
Landslides
(slope instability) — Property Hazard Information
Some types of ground, may be susceptible to a landslide hazard. Downslope
movement of materials, such as a landslide or rockfall may lead to a loss of support
and damage to buildings.
Running
sand — Property Hazard Information
Some types of ground, can contain loosely packed sandy layers that can become
fluidized by water flowing through them. Such sands can 'run', removing support
from overlying buildings and causing potential damage.
swell — Property Hazard Information
Some types of ground, can change volume due to variation in moisture. The
changing volume can cause ground movement which could potentially affect
building foundations, pipes or services.
Soluble
rocks (dissolution) — Property Hazard Information
Some types of ground, contain layers of material that can be dissolved by water.
This can cause underground cavities to develop. These cavities reduce support to
the ground above and can lead to a collapse of overlying material.