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Home > Forums > Geotechnical Engineers > Activities > Soil mechanics engineering Forum

Restrained force-Pole embedment

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dgkhan (Structural)

7 Dec 07 7:40

Using Enercalc for Pole embedded in soil, gives restraining force if pole is restained with cocnrete floor etc. How to manually cross check this force?

jdonville (Geotechnical)

7 Dec 07 10:43

dgkhan,

Would diameter of pole x Area of contact w/ concrete x design compressive strength of concrete do it?

d x A x f'c

You may need to use a reduction factor for f'c (typically 0.85) and/or an arching effect multipiler for d (typically 2-3).

Hope this helps.

Jeff

msquared48 (Structural)

7 Dec 07 13:54

Force at the concrete level should be the sum of your lateral P force at the top of the pole plus your passive pressure against the pole and footing under the slab level.

Remember, for a pole barn, 2X the IBC table values of passive pressure are allowed since more deflection is permissable.

Mike McCann
McCann Engineering

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