FIELD: hydraulic engineering.
SUBSTANCE: invention can be used to protect sand beaches from washing away by surf. Method to prevent washing away of sand beaches includes placing of obstacles in form of closed cylinder in zone of action of incoming wave which reciprocates by rolling in zone of action of wave, thus compacting the soil. Energy of wave is used for this purpose at uprush and gravity force of obstacle at backrush. Length of closed cylinder corresponds to length of protected section of beach. Method is implanted using device consisting of shell made of cloth in form of cylinder and filled with liquid and air. Shell is made for rolling and is installed in zone of action of incoming wave.
EFFECT: protection of sand beach from washing away using energy of surf.
3 cl, 1 dwg
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