GGU-UNDERPIN: Design

When you begin an analysis, the program requires the stiffnesses of the underpinning wall and any anchors and struts present. The stiffness EI of the wall is acquired from E·d³/12, where d is the thickness of the wall in the section under consideration. The stiffness of each element is assumed as constant, where the thickness is the thickness at the centre of the section. The remaining values of any anchors or struts can be specified before beginning the analysis.

Once the structural analysis is complete the program performs the following verifications for all rods (finite elements):

• calculation of bearing capacity safety to DIN 4017 and additional verification of footing within slopes and for footing with base inclination, where necessary;

• calculation of settlements to DIN 4019;

• calculation of sliding safety;

• calculation of hydraulic heave safety;

• calculation of buoyancy safety;

• verification of the unreinforced concrete to DIN 1045.

By going to the menu item "Editor 1/Verifications/Safety factors", or selecting the partial safety factors in "Editor 1/Verifications/Partial factors" and "Editor 1/Buoyancy + Hydraulic heave", you can select the verification to be performed.

The settlement analysis can be activated or deactivated by going to "Editor 2/Settlements".