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GGU-RETAIN: "Anchors" menu item

Anchors are defined in the dialog box of this menu item.

It is necessary to enter the following information:

  • Depth [m] = position of anchor head
  • Inclination [°] of anchor
  • Length [m] of anchor = starting point of deep-seated stability
  • EA [kN/m] = axial stiffness of the anchor steel per metre of wall. If the "Use anchor/strut spacing" check box is activated in the "Editor 1/Analysis options" menu item, EA is entered per anchor in [kN].
  • H DM [m] = height of deadman (if present)
    This value is only necessary for analysis of deep-seated stability and for the heave of anchor soil verification.
  • L GR [m] = length of grouted section
    With the partial safety factor concept and the "Use anchor/strut spacing" check box activated, this value reduces the possible anchor force in the deep-seated stability analysis in accordance with EAB EB 44 if the anchor spacing is greater than half the grouted section. Otherwise the value has no influence on the analysis and is used for the graphical visualisation. The length labelling of the anchor includes half the length of the grouted section.

By activating the "Verification with qs,k" check box instead of "H DM" und "L GR" the following data have to be entered:

  • FL [m] = free length (top)
  • TL [m] = total injection length
  • D [m] = diameter

Then, the skin friction values qs,k defined in the menu item "Editor 1/Soils" are used for calculation. For the reduction in accordance with EAB EB 44, TL - FL is then used as the grouted section.