Quick start (5 minutes)¶

Let's verify a slope from scratch to reading the factor of safety. All you need is the browser and the slope profile.

1. Open the app¶

Go to nx.geostru.ai/slope. You can work right away as a guest; to save to the cloud, sign in with your GeoStru account.

On the left you'll find three tabs — Input, Analysis, Output — and on the right the 2D section, 3D model, Stresses and Report views.

2. Draw the topographic profile¶

In the Input → Topographic profile panel, enter the ground vertices (X, Z) in the table, or press Draw and click the points on the section. Alternatively, import a DXF or an image to trace over.

Start from an example

No profile at hand? Open the ? dialog at the top and, in the Resources tab, load an example scenario (embankment, reservoir, wall): it is ready to calculate.

3. Assign the materials¶

In Geotechnical materials press + Add material and set the parameters: unit weight γ, saturated γ_sat, effective cohesion c′, friction angle φ′ and, for the undrained analysis, the undrained cohesion c_u.

A slope with no contacts is a single layer (the bedrock). For several layers, draw the stratigraphic contacts and assign each region its material with a double-click on the polygon.

4. Water table, loads and seismic (if needed)¶

Water table: draw the piezometric line in Water table line.
Loads: add a distributed load and drag it into position on the section.
Seismic: in the Analysis panel, enable the seismic analysis and compute k_h/k_v to NTC.

5. Choose method and design code¶

In the Analysis panel:

Analysis condition: Drained (effective stress) or Undrained (total stress). New projects start in Drained.
Calculation method: Bishop, Fellenius, Janbu, Spencer or Morgenstern-Price.
Design code: NTC 2018, EC7-EC8 or User, with the partial factors of the combination.

6. Define the surface and calculate¶

Choose the surface shape:

Circular → press Automatic search: the grid of centres places itself above the slope.
General → assign the points or start the automatic search.

Press Calculate. In a few moments you see the critical surface in red and the minimum FoS; the Output tab lists the first surfaces by FoS.

Explore the grid

Hover over the grid nodes to see each centre's FoS. Click pins the surface, double-click or Esc stops the exploration.

7. Read and document¶

Open Output for the verdict (FoS ≥ threshold = verified) and, with one click, ask the AI to explain the result or to find the measure (e.g. drainage) to reach the design FoS.
Open Report for the document preview and download it in Word.

Done: you have verified your first slope. For the complete picture, continue with the Full workflow.

Found an error on this page? Let us know or open a Pull Request.