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Basic Data

This part of the window serves to introduce basic parameters of soils - unit weight, angle of internal friction and cohesion. The particular values are obtained from geotechnical survey or from laboratory experiments. If these data are not available, it is possible to exploit built-in database of soils, which contains values of selected characteristics of soils. The characteristics of rocks are not listed in the database built, these parameters must be defined manually. Approximate parameters of rocks are presented in the theoretical part of the Help herein.

Soil parameters differ according to the analysis type and analysis method ("Settings" frame, "Spread Footing" and "Settlement" tabs).

The analysis type differs according:

  • analysis for drained conditions: effective parameters of shear strength of soil cef, φef are used commonly.
  • analysis for undrained conditions: vertical bearing capacity of foundation depends on undrained shear strength of soil cu. Effective angle of internal friction φef is defined only for calculaction of earth pressure to solve horizontal bearing capacity of foundation.
  • analysis of foundation on rock subgrade: for this analysis method program defines angle of internal friction of rock φ, compressive strength σc, coeficient of damage of rock D, coefficient of structural strength mi and Geological Strength Index.

The associated theory is described in detail in chapter "Analysis of bearing capacity of foundation".

Dialog window "Add new soils" - "Basic data"