Enerpac JS125 - Calculate the Ground Bearing Pressure with Foundation

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Document number: ED.03783.00.001.ENG rev 4 Page 44 of 153
4.2.2 Calculate the ground bearing pressure with foundation
This section describes how to calculate the ground bearing pressure, depending on
• the load
• the maximum swivel height
• the side load
When a foundation is used then the force spreads down in an angle of 45
0
. As an effect both the
length and the width of the effective bearingsurface are extended with 2h:
The effective bearing surface of one plate will be (L
jack-up
+ 2h) * (B
jack-up
+ 2h).

NB
The ground bearing pressure can be reduced by applying a foundation.
Attention
Construct the foundation in such a way that the force can spread down over 45
0
in all directions as within the illustrations.
Attention
Fully support the bearing area with timbers. Do not allow gaps between the
timbers below each bearing area!