What does the Support Force Graph show?

It is a common misconception that the pile/support force diagrams are soil/pile interaction forces.  Slide does not give soil/pile interaction forces, and RS2 is required in order to do that.  The hatched figure is simply the pile force diagram drawn on the side of the pile. 

nail_force_diagram2.gif

 nail_force_diagram.gif

Soil Nail Force Diagrams

For an overview of how the pile/support force diagrams are determined, see the Overview of Support Implementation help topic.