GGU-SETTLE: System data (Ex. 1)¶
For example, you know the constrained modulus profile of 5 boreholes (BP 1 to BP 5) from field investigations. The boreholes have the following coordinates:
| Borehole | x [m] | y [m] |
|---|---|---|
| BP 1 | 0.0 | 21.0 |
| BP 2 | 1.0 | 6.0 |
| BP 3 | 12.5 | 15.0 |
| BP 4 | 25.0 | 22.0 |
| BP 5 | 24.0 | 4.0 |
Table 1 Borehole coordinates
We have a 3-layer system. The individual layers have the following soil properties:
| Layer no. | Soil type | Constrained mod. initial loading [MN/m²] | Constrained mod. reloading [MN/m²] | Poisson's-ratio [-] | Unit weight of soil [kN/m³] |
|---|---|---|---|---|---|
| 1 | Silt | 12 | 30 | 0.0 | 18 |
| 2 | Sand | 45 | 110 | 0.0 | 10 |
| 3 | Clay, silty | 6 | 15 | 0.0 | 11 |
Table 2 Soil types and soil properties
Unit weight input is only decisive if the limiting depth is to be calculated with a percentage value of the overburden stress. Constrained modulus input for reloading is only decisive when foundations with excavation unloading are being processed.
The layers at the individual boreholes, measured from ground level (GL), reach the following depths:
| Borehole | Layer base 1 [m b. GL] | Layer base 2 [m b. GL] | Layer base 3 [m b. GL] |
|---|---|---|---|
| BP 1 | 2.00 | 3.50 | 15.00 |
| BP 2 | 2.00 | 4.00 | 15.00 |
| BP 3 | 2.00 | 5.00 | 15.00 |
| BP 4 | 2.00 | 5.00 | 15.00 |
| BP 5 | 2.00 | 4.00 | 15.00 |
Table 3 Layer depths
In the example, two foundations with the designations 'F1' and 'F2' are present.
| Foundation | x (left [m] | y (bottom) [m] | Foundation pressure [kN/m²] | Length [m] | Width [m] |
|---|---|---|---|---|---|
| F1 | 4.0 | 14.0 | 200.0 | 7.0 | 4.0 |
| F2 | 14.0 | 8.0 | 200.0 | 3.0 | 3.0 |
Table 4 Foundation dimensions and pressure
Both foundations have their base at 0.8 m below ground level.