Geotechnical Tools
A structured collection of calculation tools covering key areas of geotechnical engineering, from site characterisation to analytical methods.
Shear Strength Tools
Standard Penetration Test (SPT) Corrections for N₆₀ and (N₁)₆₀
Energy and equipment corrections yield N60; vertical effective stress follows sample depth, groundwater depth, and bulk unit weight, then Idriss and Boulanger (2008) gives CN and (N1)60.
Soil Profile Plot
Vertical effective stress is computed automatically from sample depth, GWT, and bulk unit weight (BHA). Cr is assigned from sample depth ranges, and overburden correction follows Idriss and Boulanger (2008), with 0.40 ≤ CN ≤ 1.70.
Narrow screen: swipe the table horizontally to see all columns and inputs.
| Borehole ID | Sample Depth(m) | N | σ′v0(kPa) | CE | Cb | Cr | N60 | CN | (N1)60 | Action |
|---|---|---|---|---|---|---|---|---|---|---|
27.75 | 1.167 | 1.000 | 0.750 | 11 | 1.700 | 18 | ||||
40.78 | 1.167 | 1.000 | 0.800 | 17 | 1.531 | 26 | ||||
Depth vs N₆₀
Depth vs (N₁)₆₀
Save Profile Analysis
Save current profile inputs and plot images to the active project folder.
Cloud save is available from Bronze upward. Register for an account to use cloud save. You can still use tools with manual inputs.
Select a project/borehole from the top-right dropdown first.
Important disclaimer
These results are simplified and indicative only. Please review the site-wide Disclaimer before using this tool in any engineering workflow.