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Ground Loss 

GEO5

Geotechnical software

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Coefficient of calculation of inflection point

When the classical methods are used the inputted coefficient kinf allows the determination of the inflection point location based on Linf=L/kinf. In this case the coefficient kinf represents a very important input parameter strongly influencing the shape and slope of subsidence trough. Its value depends on the average soil or rock, respectively, in overburden – literature offers the values of kinf in the range 2,1 - 4,0.

Based on a series of FEM calculations the following values are recommended:

- gravel soil G1-G3 kinf =3,5
- sand and gravel soil S1-S5,G4,G5, rocks R5-R6 kinf =3,0
- fine-grained soil F1-F4 kinf =2,5
- fine-grained soil F5-F8 kinf =2,1

The coefficient for calculation of inflection point is inputted in the frame "Project".




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