METHOD FOR PROTECTION AGAINST WAVE ACTION OF SINGLE HYDRAULIC STRUCTURE, AND DEVICE FOR ITS IMPLEMENTATION

摘要

FIELD: construction.;SUBSTANCE: method for protection against wave action of a single hydraulic structure consists in the fact that arriving waves of the hydraulic structure are separated on both sides around the structure by creating horizontal near-surface streams diverging to both sides across the direction of waves, which are formed by a flat symmetrical floating-up gas-liquid flow that is created in water environment under arriving waves. Symmetry plane is located in a diametrical plane of the structure and perpendicular to wave movement. Flow rate of gas, mainly air is chosen so that horizontal velocity of near-surface streams of a gas-liquid flow is at least 0.2 of velocity of arriving waves. A zone where a gas-liquid flow is formed is located in the above symmetry plane at the distance before the hydraulic structure of not closer than (0.3-0.5) of the width and not farther than (1.5-2.0) of the length of the hydraulic structure. Length means the structure size along diametrical plane in the wave direction, and width means the size along the wave front. Gas-liquid flow is created at the depth of not less than 0.6 of amplitude of an arriving wave by supplying the air under pressure to water environment so that bubbles are formed. A device for the method's implementation includes a discharge device on both sides around the hydraulic structure of arriving waves based on the use of a gaseous substance, mainly air. The above device is made in the form of a deaerator of water environment with bubble air inclusions, which consists of perforated tube 1 located along the diametrical plane of the structure along the movement direction of arriving waves and increased air pressure source 3 connected to it via main line 2. Length of tube 1 is (1-1.5) of length of the hydraulic structure, and location of the tube end that is the closest to the above structure is (0.3-0.5) of width of the structure. The tube is located so that it is submerged under water to the depth equal to at least 0.6 of an amplitude of an arriving wave starting from still water surface.;EFFECT: providing effective protection of a single hydraulic structure against power action of waves arriving at it.;6 cl, 4 dwg