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Phase 1 Ground Stability

A collapse of a building, caused by near-surface mining features
A collapse of a building, caused by near-surface mining features.

A Phase 1 Ground Stability study:

This will identify any potential ground stability hazards which may exist on your site. Hazards may include:

  • Subsurface voids from Mining or other man-made features.
  • Subsurface voids from caves, solution features or other natural processes.
  • The potential for unstable slopes.
  • The potential for compressible ground including high plasticity clay.

An AGS Ground Solutions Phase 1 ground stability report will be suitable for submission to the local authority as part of an ‘Unstable Ground’ planning condition, and may also be used to obtain a building warrantee.

Probe drilling within a confined space (basement), to establish a rock profile in Helston, Cornwall.
Probe drilling within a confined space (basement), to establish a rock profile in Helston, Cornwall.
Establishing a factor of safety for a slope in Truro, Cornwall, using computer modelling techniques.
Establishing a factor of safety for a slope in Truro, Cornwall, using computer modelling techniques.
Making access for a slope stability investigation in Looe, Cornwall
Making access for a slope stability investigation in Looe, Cornwall.

Intrusive Site Investigation:

Once identified, the risks posed by each type of potential ground hazard need to be quantified. This is undertaken by means of a Phase 2 Ground Stability Report or Intrusive site investigation.

Our specialist drilling crews and excavator operators will enable us to paint a detailed picture of the ground hazard.

We have access to specialist lightweight or confined space access equipment to ensure that we can access most sites, even those which may seem inaccessible!

Our degree qualified and highly experienced engineers have access to a range of test equipment, and computer analysis techniques, to ensure that the report findings are accurate and relevant.

Investigative drilling at a petrol station site in St Ives, Cornwall.
Investigative drilling at a petrol station site in St Ives, Cornwall.

Phase 2 Ground Contamination Site Investigation:

Once identified, the risks identified in the conceptual site model should be assessed by way of a quantitative risk assessment.

We have access to specialist lightweight or confined space access equipment and our drill rigs can be fitted with intrinsically safe fittings to enable investigation to take place in difficult access or environmentally sensitive sites.