FIELD: hydraulic engineering. SUBSTANCE: upper plate of the hydraulic structure is connected to flexible shell placed between upper plate and lower plate, and provided with a drive influence by either lateral weight, or buoyancy (depending on locality of the protective hydraulic structure) on upper plate to form rarefaction in flexible shell cavity. EFFECT: increased carrying capacity to dynamic local and total loads, simple making and installation on both land and bottom, may be used with loss-of-power. 3 cl, 5 dwg
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