Passive Pressure
Passive Pressure
(OP)
I am looking for opinions others may have for "clean" stone acting to withstand building lateral loads. The site condition I am analyzing is the passive pressure of a 12" layer of clean stone as a result of lateral forces from grade beams. To describe the constraint conditions, there are multiple grade beams with finished floor 6" above clean stone. The 6" is a gap, no soil.
Can this clean stone be compacted to an affective density to provide passive pressure? Does the gap create an unrestrained condition, i.e. the stone will tend to push upwards during a lateral event?
Thanks in advance.
Can this clean stone be compacted to an affective density to provide passive pressure? Does the gap create an unrestrained condition, i.e. the stone will tend to push upwards during a lateral event?
Thanks in advance.






RE: Passive Pressure
RE: Passive Pressure
RE: Passive Pressure
I thought a little about how I worded the question and the stone pushing up now does not make sense to me. The grade beams are rigidly connected so if one grade beams moves, they all do. Either way, clean stone with a gap under the plank, to me, seems to not provide support. I have been authorized to use 400 lb/ft^2/ft for this passive pressure? Seems high to me.