ABSTRACT
The boathouses construction in Prymorske village (Crimea, Ukraine) caused the need to undercut the existing Black Sea coastal slopes. It required some additional measures to stabilize the man-made slopes, which were formed as an undercutting result. There was not enough space to make the slopes not steep, so it was recommended to use geotextiles to reinforce them. The PLAXIS software package and the simplified LANDSLIP software with the Bishop and Spencer model were used. The PLAXIS package allowed to perform the direct dynamic calculations of the initial and undercut slopes. Calculated accelerograms of the 7 and 8 points earthquakes were used for calculations. The required breaking strength was provided by geotextile materials with the 130–170 g/m3 density. The man-made slope reinforcement with synthetic materials should be carried out in layers in every 0.75 m using backfilling with cohesive soil from undercutting the slope with a specific gravity and without compression.
