Design top-down soil nail walls and ground anchors. For a nail wall the studio works out the earth pressure and maximum nail force, checks every row for tension and for pullout beyond the active zone, checks the shotcrete facing for punching, and searches for the critical wedge through the toe with the nails in it. For anchors it finds the load, the free length beyond the active wedge, the bond length and the strand tendon. For testing it sets out performance and proof test schedules and checks the apparent free length and creep from your readings — with sections, test charts, a 3D view, calculation sheets and Excel.
Scope & limitations
Preliminary soil nail and anchor design for study and planning. Bond strengths must be confirmed by sacrificial or verification tests; check drainage, corrosion protection and overall stability with a full slope analysis for final design.
What the Soil Nail & Ground Anchor Studio does
Soil nail walls: the Coulomb active coefficient with the face batter and backslope gives the maximum nail force 0.75 Ka (γH + q) Sh Sv (the normalised design value of FHWA GEC 7), reduced towards the toe. Each row is checked for tension (bar yield over its factor of safety) and for pullout over the bond length beyond the active plane, and the facing for punching under the face load T0 = Tmax [0.6 + 0.2 (Smax − 1)].
Global stability: planar wedges through the toe are searched from 30° to 80°; each nail contributes the smaller of its tensile and pullout capacity beyond the plane, resolved along and normal to the plane, and the lowest factor of safety is compared with the temporary or permanent requirement.
Ground anchors: the support load from apparent earth pressure (or the wall analysis), the free length to beyond the active wedge plus the greater of 1.5 m and 0.2 H, the bond length from the ultimate bond stress, and the number of 15.2 mm strands at 0.6 Fpu with the test load within 0.8 Fpu.
Testing: performance and proof test load cycles to 1.33 DL, creep between 1 and 10 minutes (or 6 and 60 minutes), and the apparent free length from the elastic movement against its acceptance band. Output: sections, test charts, a 3D view, PDF calculation sheets, A3 drawings and Excel.