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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 a geotechnical survey or from laboratory experiments. If these data are not available, it is possible to exploit the 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.

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 c_ef, φ_ef are used commonly.
• Analysis for undrained conditions: the vertical bearing capacity of foundation depends on the undrained shear strength of soil c_u. Effective angle of internal friction φ_ef is defined only for calculation 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 strengthσ_c, coefficient of damage of rockD, coefficient of structural strengthm_i and Geological Strength Index.

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

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