GGU-RETAIN: Variant "Section length fixed and bedded toe"

In this variation you enter a fixed height for the wall.

The elastic calculation results in a soil pressure that occurs in front of the wall and can be determined from the product of the modulus of subgrade reaction and the deformation along the wall. This elastic pressure may not be greater than the passive earth pressure acting in front of the pile. Following analysis, this condition will generally not be met, so that iterative reduction of the modulus of subgrade reaction, along with the resulting soil pressure, will be necessary to meet it. The following dialog box will appear, with which you can control the iteration process.

The default values have proven themselves in practice and will generally not need to be altered.

"Damping" prevents strong fluctuations around the actual solution during the iteration process. A value of 0.0 produces no damping, while a value of 0.99 produces very strong damping and long computation times.

Using "Permissible excess" you specify the percentage by which the elastic stress may exceed the passive earth pressure before the iteration is ended.

The number of iteration steps can also be specified. If, after the set number of steps, soil pressure is still greater than passive earth pressure, iteration is ended without result.

During iteration, the modulus of subgrade reaction is reduced. If the analysis requires a reduction over the entire wall length to a value below "max ks", iteration is aborted. This usually happens when the wall is not long enough to take the load.