GRM have recently been responding to a number of clients who have been faced with comments from local authorities and local homeowners to clarify the vibration risks and the chance of damage occurring from proposed piling operations. This is an especially prevalent issue on sites where ground conditions are stiff or particularly desiccated and ground conditions are such that much of the energy delivered by the piling rig goes into the ground, therefore setting up a higher vibration risk.
To provide an adequate response GRM have developed an in-house tool, using recognised methods, to determine the likely scale of vibration at a site. This is reported in a Piling Vibration Assessment (PVA), which will:
• Inform the developer and the local authority on how piling works may affect the local area.
• Determine appropriate vibration thresholds and provide mitigation advice.
• Identify which parts of the local community need to be pre-warned about piling activity though a letter drop.
• Identify those who may benefit from a structural condition survey.
By following the PVA this will:
• Identify baselines and minimise damage to property in the local community.
• Reduce the risk of spurious claims for damage from local property owners..
• Give comfort to the local community to show that the damage potential is being minimised.
We also convert the outputs from the tool into GIS to display the risk in such a way that can be readily understood by technical and non-technical readers.
If you are undertaking piling and want to manage your risk from claims, then contact GRM for a Piling Vibration Assessment.