base isolation of slab

[struct6]

Hi All,

I am working on a project in which the client wants to put a high sensitive equipment in a ground floor of the building. they have conducted a vibration survey and the current vibration levels are higher then the acceptable levels established by the equip manufacturer. The current foundation system is slab , grade beam and pile system .

we are planning to cut the slab and pour a new foundation supported by helical piers. This will isolate the foundation for the equipment from the main foundation system .

what are your thoughts on this idea ? Please feel free to suggest new idead to reduce the vibration.

 

[steellion]

Sounds reasonable. Make the slab nice and thick, as vibration is inversely proportional to stiffness. Check to see what type of vibration dampers are included/available with the equipment.