Method for protection against wave action of single hydraulic structure, and device for its implementation

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

 

The invention relates to methods and devices for the production of hydraulic works for the protection of hydraulic structures from waves, and more specifically to the protection of a single hydraulic structures from wave action.

The known method and device for suppressing waves in the coastal zone, whereby carry out the reduction of the intensity of the waves by means of force effects in the aquatic environment elements, mounted on the bottom of the soil zone, which are in the form of flexible membranes, which have a lower troughs of the waves and fill them in a deformable material, for example a gas, and a volume that allows each of the elements to deform all the time wave crest above it. The elements are arranged randomly and are connected by highways with gas (patent RF №2147060, EV 3/06, dated 27.03.2000).

The method and the device does not have sufficient reliability and efficiency reduce the intensity of the waves, because the device is only applicable to shallow water and has a large inertia deformation of its elements by passing over them in waves, in particular waves with significant speeds, when reducing the height of the waves is low, and hence the efficiency of reducing the energy of waves.

There is also known a method and device for protection of coastal and marine coop is raised from the damaging wave action, according to which to approach the incident to the construction of the wave carry out the reduction of their intensity with the use of gaseous substances, preferably air, through which the front of the building in an aqueous medium to form a water-air bubble veil with a degree surround vozdukhosoderzhaniya curtain not less than 20%. The length of the zone such veils in the course of the waves is not less than 0.3 length of the incident wave. The device consists of a system of perforated pipes arranged in a row along the waves with width equal to the length of the zones mentioned air curtains, which are reported by the highway with a source of high pressure air (patent RF №2366777, EV 3/06 (2006.01) with priority from 14.01.2008,) prototype.

However, the implementation of the known method requires a significant energy cost to create air curtains with energy comparable to the energy incident on the structure of wave intensity which is necessary to reduce or destroy the wave front of the building. In addition, the creation of the device to implement the method also requires significant material costs.

The task of the invention is the reduction of operating costs while protecting single hydraulic structures from wave action rolling of waves and material costs to create is the device for realization of the specified protection.

To do this, in the way of protection from wave action single hydraulic structures according to the invention is incident on the hydraulic structure of the wave bred on both sides around the buildings by creating divergent in both directions across the direction of the waves horizontal near-surface currents, emerging ploscockletocny pop-up gas-liquid flow, which is created in the aquatic environment under the rolling waves and the plane of symmetry is located in the median plane of the structure and perpendicular to the motion of the waves. The consumption of gas, preferably air, pick up, so the horizontal velocity near-surface currents of gas-liquid flow was not less than 0.2 the speed of the oncoming waves, and the area where form a gas-liquid flow, is placed in a specified plane of symmetry at a distance in front hydraulic structure is not closer (0,3 - 0,5) width and no further (1,5 - 2,0) length waterworks, where length is the size of the construction according to the median plane in the direction of the wave, and the width is the dimension of the wave front.

In addition, the gas-liquid stream to create a depth of not less than 0.6 amplitude of the incident wave by filing under pressure into the aquatic environment of air bubbles.

Creating in the aquatic environment under the incident in the us ploscockletocnuu pop-up gas-liquid flow ensures the formation and creation of divergent in both directions across the direction of the waves horizontal near-surface currents, all of which bred on both sides around hydraulic structures incident to him wave.

The choice of gas flow in which the velocity of the surface currents would be not less than 0.2 the speed of the oncoming waves, enables efficient formation of near-surface currents, which are bred around hydraulic structures incident to him wave, preventing their power.

In the device for protection against wave action single hydraulic structures, including vehicle exhaust on both sides around hydraulic structures of the rolling waves based on the use of gaseous substances, preferably air, this tool is made in the form of aerator water environment air bubble inclusions, consisting of located on the median plane of the structure along the direction of motion of the rolling waves of the perforated tube and communicated with her main source of high pressure air. The length of the tube is (1-1,5) the length of the waterworks, and the distance from the middle of the above mentioned construction of the tube end is (0,3-0,5) width of the structure. When this tube is submerged to a depth equal to not less than 0.6 amplitude of the incident wave, measured from the surface of calm in the water.

In addition, the pipe is mounted with the possibility of changing its otstoyniy from construction, set its horizontal orientation and depth under the water.

The device is equipped with a regulator for supplying air into the perforated tube.

Along with this, the source of high pressure air may be located on shore or on hydraulic structure.

The efficiency of removal from waterworks waves and their divorce on both sides around the facilities provided when the length of the perforated tube, component (1-1,5) the length of the waterworks, and the distance from the middle of the construction of the tube end is equal to (0.3 to 0.5) the width of the structure.

Provided a device control otstoyniy perforated tube of a structure, the value of its penetration and horizontal orientation allows you to jog around a single waterworks rolling him waves of different lengths, heights and in different directions.

Dive under the water of the perforated tube to a depth of not less than 0.6 amplitude incident waves, counting from the calm water surface, provides sufficient "acceleration" pop-up bubbles of air and, consequently, the required speed of the surface currents is not less than 20% of the speed of the oncoming waves. It is derived based on the C following estimate of the maximum speed of the surface currents:

u=1.46(Qg)1/3(1+pgHP0)-1/3,

where Q is the volumetric flow rate divided by the length of the tube, g is the acceleration of gravity, H is the depth of the tube, ρ is the density of the liquid - air pressure value.

The essence of the invention is illustrated by drawings, where figure 1 shows a variant of the device for implementing the method, figure 2 - scheme of occurrence of near-surface currents from the pop-up bubbles, figure 3 - physical modeling of divergent surface currents and figure 4 - diagram of the model experiment in the experimental pool.

The device includes a means of drainage on both sides around a single hydraulic structures of the rolling waves, which is made in the form of aerator water environment air bubble inclusions, consisting of the property before construction according to the median plane (PDWith) along the direction of motion of the rolling waves of the perforated tube 1 and connected to highway 2 source of high pressure to the I air 3, which is communicated with the specified tube 1 through the flow regulator 4 supply of air into it (figure 1). This tube 1 is made from construction to meet the oncoming waves on the distance from the middle of the construction of the end of the tube 1, comprising (0,3-0,5) dimensions width constructions (In) wave front and is installed with the possibility of changing its removal from structures, horizontal orientation and burial under the water surface to a depth of not less than 0.6 amplitude waves, counting from the calm water surface, depending on the parameters of the rolling waves. The length of the tube 1 is (1-1,5) the length of the hydraulic structures and it is situated on a height-adjustable stand 5 mounted on the bottom of the reservoir 6 (figure 1).

The proposed method of protection from wave action single hydraulic structures by using the proposed device, as follows.

Depending on the parameters of rolling hydraulic structure of the waves (the speed of crowding and amplitude) perforated tube 1 stand in front of the building towards the incident waves on the distance measured between its neighbors to the construction end and by construction, equal to (0.3 to 0.5) the width of the structures and features on the median plane of the structure under water at a depth of not less than 0.6 amplitude of the incident wave, starting from the poverhnosti calm waters. Through line 2 into the tube 1 serves the air from a source of high pressure 3, surfacing, entrain particles of water, forming ploscockletocny pop-up gas-liquid flow, which forms a horizontal subsurface flow, divergent across the direction of the waves in opposite directions (figure 2, 3). Depending on the speed of the oncoming waves set the flow rate of air into the tube 1 through the flow regulator 4 to achieve the values of the horizontal velocity near-surface currents of gas-liquid flow, equal to not less than 0.2 the speed of the oncoming waves. The resulting transverse surface currents carry out the divorce around a single hydraulic structures incident waves at him, thus ensuring protection of this facility from the force action of the waves. When changing direction or amplitude of the incident waves are adjusting accordingly the position of the perforated tube 1, orienting it along the direction of the waves, and the depth of its immersion in the water.

In the process of conducting model experiments in the experimental pool (figure 4) excitement was generated by the wavemaker and was measured by pornografa, the perforated tube was laid on lifting the bottom and is oriented perpendicular to the front of wave propagation in diameter, the Central plane of the model structures. Before model construction Volgograd recorded the incident on the model of the wave. The force of wave action on the above model were recorded dynamometers. Data torque measurements performed on the model structures show that the force on the model structures is reduced by at least 30%.

The proposed method and device provide lower operating costs while protecting single waterworks power from wave action rolling of waves and material costs for construction of a device for implementing the protection that distinguishes them from the prototype.

1. The method of protection from wave action single hydraulic structures, characterized bythe fact that rolling hydraulic structure wave bred on both sides around the buildings by creating divergent in both directions across the direction of the waves horizontal near-surface currents, emerging ploscockletocny pop-up gas-liquid flow, which is created in the aquatic environment under the rolling waves and the plane of symmetry is located in the median plane of the structure and perpendicular to the motion of the waves, the consumption of gas, preferably air, picked so that the horizontal speed of plovernet the output currents of gas-liquid flow was not less than 0.2 the speed of the oncoming waves, moreover, the zone where the form of gas-liquid flow, is placed in a specified plane of symmetry at a distance in front hydraulic structure is not closer (0,3-0,5) width and no further (1,5-2,0) length waterworks, where length is the size of the construction according to the median plane in the direction of the wave, and the width is the dimension of the wave front.

2. The protection method according to claim 1, characterized in that the gas-liquid stream to create a depth of not less than 0.6 amplitude of the incident wave by filing under pressure into the aquatic environment of air bubbles.

3. Device for protection against wave action single hydraulic structures, characterized by the fact that it has a means of drainage on both sides around hydraulic structures of the rolling waves based on the use of gaseous substances, preferably air, is made in the form of aerator water environment air bubble inclusions, consisting of located on the median plane of the structure along the direction of motion of the rolling waves of the perforated tube and communicated with her main source of high pressure air, and the tube length is (1-1,5) the length of the waterworks, and the distance from the middle of the above mentioned construction of the tube end is (0,3-0,5) width DEWA tering the program, when this tube is submerged to a depth equal to not less than 0.6 amplitude of the incident wave, measured from the calm surface of the water.

4. The device according to claim 3, characterized in that the tube is installed with the possibility of changing its otstoyniy from construction, horizontal orientation and depth under the water.

5. Device according to any one of p or 4, characterized in that it is provided with a regulator for supplying air into the perforated tube.

6. Device according to any one of p or 4, characterized in that the source of air of high pressure is located on the shore or on the hydraulic structure.



 

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