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- from NAP+3.5 m to NAP+1 m: peat
- from NAP+1 m to NAP-5 m: silty clay
- from NAP-5 m to NAP-18 m: moderately to loosely compacted sand (Calais)
- from NAP-18 m to NAP-30 m: densely compacted sand
For the Detailed check, the following input is used:
- Required probability of failure of the dike: 1:4000 year
- Percentage probability of failure by liquefaction: 1 %
- Maximum allowable retrogression length: Lallowable = 60 m (length of the foreland)
- Considered dike length: 800 m
- Mean value of the area ratio (c = A2/A1): 1.4
Benchmarks results
The details of the calculation can be found in annex A of the report. The main results are given in the table below. The global check fails but the detailed check passes.
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