Manual utilizator Slope - GeoStru Software

NORMATIVE 22
strips and rafts.
2. Some of the provisions may be applied to deep foundations such as caissons.
6.2 Limit states
1. The following limit states shall be considered and an appropriate list shall be
compiled:
- loss of overall stability;
- bearing resistance failure, punching failure, squeezing;
- failure by sliding;
- combined failure in the ground and in the structure;
- structural failure due to foundation movement;
- excessive settlements;
- excessive heave due to swelling, frost and other causes;
- unacceptable vibrations.
6.3 Actions and design situations
1. Design situations shall be selected in accordance with 2.2.
2.The actions listed in 2.4.2(4) should be considered when selecting the limit
states for calculation.
3.If structural stiffness is significant, an analysis of the interaction between the
structure and the ground should be performed in order to determine the
distribution of actions.
6.4 Design and construction considerations
1. When choosing the depth of a spread foundation the following shall be
considered:
- reaching an adequate bearing stratum;
- the depth above which shrinkage and swelling of clay soils, due to
seasonal weather
changes, or to trees and shrubs, may cause appreciable movements;
- the depth above which frost damage may occur;
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