Ground Investigation

A ground investigation usually involves carrying out excavation (trial pits) or boreholes to find out the types and depths of soil and rock which are present below the ground surface. We need to know this so we can work out whether the flood risk reduction proposals for walls or embankments can be safely constructed. We can also use special techniques to find out ground conditions without excavating or sinking boreholes - this is called geophysical surveying and uses radar and ultrasound to work out the different soil and rock types