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Ground Loss 

GEO5

Geotechnical software

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Gradient damage

One of the causes leading to the damage of buildings is the slope subsidence trough. The program highlights individual parts of a building with a color pattern that corresponds to a given class of damage. The maximum value of tensile strain is provided in the text output.

The program offers predefined zones of damage for masonry buildings. These values can be modified in the frame "Settings". Considerable experience with a number of tunnels excavated below build-up areas allowed for elaborating the relationship between the shape of subsidence trough and damage of buildings to such precision that based on this it is now possible to estimate an extent of compensations for possible damage caused by excavation with accuracy acceptable for both preparation of contractual documents and for contractors preparing proposals for excavation of tunnels.

Recommended values for masonry buildings from one to six floors are given in the following table.

Gradient

Gradient Damage Description
1:1200  -  800 Microcracks Microcracks
1:800  -  500 Little damage - superficial Cracks in plaster
1:500  -  300 Little damage Small cracks in walls
1:300  - 150 Medium damage, functional Cracks in walls, problems with windows and doors
1:150  - 0 Large damage Wide open cracks in bearing walls and beams



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