Enerpac JS125 - Calculate the Ground Bearing Pressure with Trolleys and Tracks

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Document number: ED.03783.00.001.ENG rev 4 Page 46 of 153
4.2.3 Calculate the ground bearing pressure with trolleys and tracks
Skid tracks enlarge the ground bearing surface. Use is made of the effect that pressure spreads
down in an angle of 45°, as shown below. Skid tracks can be put
• Directly on the ground, if the bearing capacity of the ground is sufficient.
• on a foundation
o to compensate unevenness in the ground.
o to extend the ground bearing surface and therefore to lower the GBP.

NB
The higher the foundation, the lower the ground bearing pressure.
The following sections describe how the ground bearing pressure can be calculated.

NB
Feel free to apply your own calculation methods for ground bearing pressure.
bearing surface = 2 * h
bearing ground
skid track
h
foundation
extended ground bearing surface