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Advanced check for liquefaction: SLIQ2D
Determination of the imaginary surface
In this program, the fictive slope height and the fictive slope inclinaison are determined using the follwing steps:
Step 1:
The height of the part of the slope above water (h1) is increased until h2 with a factor equals to the ratio between the soil unit weight above water table and the soil below water table:
xxx
with:
w, the water grade
Sr, the degree of saturation of the soil 0 < Sr < 1). For sand (general dry) Sr = 0 and for clay (generally completely saturated) Sr = 1.
Step 2
By means of the least squares method, the submerged slope (red line in the figure below) compared to the fictive submerged slope is determineden subsequently the fictive slope inclinaison (Alpha_R).
