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GEO5

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Method of restriction of the magnitude of primary stress

If we assume in the settlement analysis the constrains in terms of the percentage of primary geostatic stress, then:
a) the influence zone is represented by a depth below the footing bottom where the incremental stress σz reaches a certain percentage of the original geostatic stress:

where: x% - considered magnitude of the geostatic stress
σor - geostatic stress

b) the settlement s is derived from stress value denoted in figure by hatching and it receives the form:

where: σz - incremetal stress
σor - geostatic stress

Depth of influence zone given by constraining the magnitude of primary stressDepth of influence zone given by constraining the magnitude of primary stress




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