CiviLab 2027 · Soil tests

Direct shear test

The direct shear test measures the failure characteristics of a saturated fine-grained soil sample subjected to direct shear along an imposed plane, at a constant rate.
At a slow rate and under drained conditions, the effective friction angle ɸ’ and the effective cohesion c’ can be derived. They are used to check safety factors against slope failure, to design foundations and to determine active and passive earth pressures on retaining structures.

Sample test sheet (PDF) CiviLab pricing

With our soil software "CiviLab", you can easily perform the direct shear test calculations and archive the test reports properly. CiviLab also produces high-quality reports and archives them properly

For the direct shear test, CiviLab applies the following standards:

  • ASTM D3080-04;
  • NF P 94-071-1;
  • NA 16218.

CiviLab allows you to:

  • Plot the shear stress versus strain curve using one of the methods:
    • Linear;
    • Cubic spline;
    • Akima cubic spline;
    • Pchip cubic spline;
    • B-spline.
  • Calculate the shear stress τ;
  • Plot the σn-τ;
  • Calculate the friction angle φ' and the effective cohesion c'.

Screenshots

Direct shear test: screenshot No. 02, Soil laboratory software CiviLab 2027 — BAKHTI Software
Direct shear test: screenshot No. 03, Soil laboratory software CiviLab 2027 — BAKHTI Software
Direct shear test: screenshot No. 04, Soil laboratory software CiviLab 2027 — BAKHTI Software
Direct shear test: screenshot No. 05, Soil laboratory software CiviLab 2027 — BAKHTI Software

Choose CiviLab 2027

Get the most attractive subscription price, with free access to all our latest updates.

See pricing Discover CiviLab