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GEO5

Tree
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Foundation

The "Foundation" frame allows to select a type of foundation. The selected type with graphic hint ("Geometry scheme") of input values is displayed in the left part of the frame. The values can be edited either in the frame by inserting values into input fields, or on the desktop with the help of active dimensions. The frame also serves to specify the unit weight of overburden.

The following types of foundations can be selected:

  • Centric spread footing
  • Circular spread footing
  • Eccentric spread footing
  • Circular stepped spread
  • Strip footing
  • Centric spread footing with batter
  • Stepped centric spread footing
  • Eccentric spread footing with batter
  • Stepped eccentric spread footing

The soil profile is specified from the original ground. The foundation bearing capacity depends mainly on the depth of foundation measured from the finished grade. When the finished grade is found above the original ground then it is required to assign the same depth to both, the finished grade and original ground, and introduce into subsoil a layer with a new made-up-ground. This frame also allows for inputting the foundation thickness.

When completed the foundation is usually filled up with a soil - its unit weight must be specified (Overburden unit weight γ1). Providing the analysis follows the theory of limit states its weight is multiplied by the coefficient γ input in the "Spread Footing" tab.

For foundations with drained subsoil (type of analysis is selected in the frame "Settings") it is possible to introduce an inclination of the finished grade and footing bottom. In all other cases both the ground and footing bottom are horizontal.

Frame "Foundation"