Water discharge - stabiliser of water flow from channels with rapid flow mode

FIELD: construction.

SUBSTANCE: water discharge - a water flow stabiliser comprises a supply (3) and a transit (4) channels, a control gate and a bottom water-receiving gallery (1), having a water-receiving hole (7) in the upper part, and this hole is covered with a vibration grid (8), and in the bottom part there is a separating wall (9), coupled with the bottom of the transit channel. The bottom water-receiving gallery is connected with a discharge pipe (5) by means of a water discharge hole. The water discharge - the water flow stabiliser is also equipped with a jet-directing system in the form of separating plates (13) curvilinear in cross section, which are installed oppositely to the supply channel into galleries into a row, aligned in series along the length of the gallery hole. The upper edges of the plates are attached at the bottom to the grid, the ends of the rods (10) of which are bent down and rest against the separating wall, coupled with the bottom of the transit channel with the possibility to create self-excited oscillations of the grid. The gallery is arranged with permanent height along its entire length and a bottom (2) arranged as inclined. The gallery is divided along the length into sections with a transverse ledge (14) and a flat plate (15), attached by the base of the ledge and the edge of the plate at the bottom to the separating wall with partial coverage along the height of the throughput section of the gallery with gaps to the bottom of the gallery. The gallery of the bottom is equipped with a concave transverse plate (16) between the ledge and the flat plate in the form of a zigzag-shaped water conduit that narrows along the length of the gallery towards its end part.

EFFECT: increased efficiency of operation by stabilisation of water discharge water flow due to change of hydraulic resistances with wave structure of a flow and efficient cleaning of water from drifts and debris.

2 cl, 4 dwg

 

The invention relates to hydraulic engineering and can be used to stabilize the water supply channel with rapid and Swinburne (wave) mode currents.

Known outlet of the channel with turbulent flow, including made in the bottom of the channel is well connected to the outlet conduit, a rotary shield mounted on a horizontal axis in the upper part of the walls of the well and facing in the direction of flow, horizontal visor, rigidly fixed to the upper part of the wall opposite walls of the well (USSR Author's certificate No. 1028769, CL EV 13/00, 1981).

The disadvantage is its low reliability, because the lattice is stationary element contributing to the rapid clogging of the grid, any change in the flow rate of the discharge, and thus the absence of stabilization of the exhaust flow. This stems from the fact that with increasing wave turbulent flow regime increases the pressure on the top of the well. There is a partial capture of sediment in the well. The flow entering the well of this size with a shield, extinguished, missing elements, hydraulic resistance, which causes a change in the exhaust flow of water in the well when the change speed of the flow (pressure) in the inlet channel, i.e. no compression stream in the end portion of the well that leads to changes in the supplies is Yes water in the outlet. As a result of such changes in the flow rate of water removal required manual adjustment processes in the water supply. The design discharge is not possible, conducts in one technological cycle tasks for stable intake of water consumption and efficient purification of water from sediment.

Also known outlet of the water flow with a turbulent regime of flow, including the supply and transit channels, regulating the speed and bottom of the water intake gallery, having in the upper part of the water intake hole, covered by a grate, and in lower part of the separating wall coupled to a bottom of the transit channel, and bottom water intake gallery connected with a discharge pipe through the water outlet hole (Waterworks. Edited Neprochnov, M.: stroiizdat, 1978, C-340, is"b").

The disadvantage of this discharge is difficult to translate turbulent wave flow in a more relaxed state without special dampers and features reliable operation. The outlet has a low throughput due to the differential pressure in the cavity gallery of the screw thread and over the entrance hole, covered by a grate. So, in the absence of air under a stream falling into the gallery, in a confined space at the wall fall creates a vacuum that adversely affects the operation of the outlet. So reliable is lnost flow is insufficient for the increasing consumption in excess of the settlement and, on the contrary, when the flow decreases, less than estimated due to the lack of additional hydraulic resistance in the gallery. Moving along the bottom of the inlet channel sediment on top of the cloth grilles (especially large ones) in the direction of transit of the canal in small influence on the intensification of rapid drainage grates large bottom sediment. Is the clogging of openings of the grid.

Channels-chutes with gradients more critical (i≥0,02) can be a wave, bezosnovnymi (Privolnoye transverse profiles) and works in two modes (wave - pass some of the costs and Bessonova - when ignoring other costs). Therefore, to have created new structures, taking into account characteristics of the channel flow, acting in this case as a source of water supply to consumers (for example, irrigation canals fed from the channel-flow).

The known device, in this case, the front bottom intake side (angle) outlet with shutoff rolling waves from the water intake and discharge their transit on the use of transverse circulation to combat the sediment and, finally, to stabilize the water supply to the consumer is not possible to translate the stormy wave flow in a calm state without special dampers. Profile rolling waves drawn is the EZLN is a sectional view of an elongated drops, rolling over the surface of the stream. Into force of this form of profile mass waves and, consequently, the flow length varies - maximum in the frontal part and descending to the tail. Thus, there is a lack of flow, resulting from the uneven distribution of speeds and costs over the skylight gallery. So over the gallery in a turbulent flow state occurs in the form of the jump, and inside the gallery there is a change in exhaust flow of water. In addition, insufficient protection of the gallery from load.

The aim of the invention is to increase efficiency by stabilizing the flow rate of water discharge due to changes in the hydraulic resistance of flow in the wave structure of the stream.

This goal is achieved due to the fact that the culvert-flow sensor water contains made between the supply and transit channels closed top vibromechanical water intake gallery, which provided, which in the form of a separation curvilinear in cross section plates attached to the bottom vibroresearch and the ends bent down and supported on the bottom of the separation wall, which is coupled with the bottom of the transit channel, with the possibility of self-oscillations of the lattice, i.e. providing the amplitude of the lattice vibrations. The water going through the channel above the gallery clipped curved plates, prevent from spreading by channel unrest arising from the collision of flows under the grassroots part of the vibrating lattice. Consequently, there arises the transverse circulation, due to it is squeezing up sediment, which then pass through the rods of the lattice. Stabilization of the water drainage is provided by narrowing the first stage in the gallery formed by the ledge across the gallery, located in the upper part of the separating wall of the gallery. As a consequence, the screw thread of the upper gallery enters this narrowing (slit) with increasing pressure the expiration in the direction towards the end portion of the gallery. For protection against reactive effects of flowing water in the end part of the gallery, before removal of the water in the discharge pipe, in addition the upper part of the gallery is equipped with attached flat plate with a slope directed towards the initial part of the gallery, where the shape and size of the bottom of the gallery have the opportunity to cut off the flow to create a tightening - screw motion of the fluid (due to the influence of the walls of the gallery). Between the lip and the flat plate attached curvilinear in cross section of the plate to the bottom of the gallery, curved in the direction of the end portion of the gallery. As in the motion of a fluid particle cutoff p is current when multiple moving along their orbits lose energy, in order to maintain practically constant energy flow capacity within the orbit along the entire length of the gallery, the cross-sectional shape of the gallery allows you to ensure stabilization of water supply water drainage. The flow rate of discharge depends only on the opening of the shutter, i.e. Q=f(a). Hence, the discharge-flow sensor is a hydrometer, without moving in parts.

Protective vibroresearch pinned at the end of the ledge-threshold flush in the inlet channel and bent down the ends of a flexible elastic material, rests on the bottom of the dividing wall of the gallery, creating a self-oscillating process vaporised along the length of the overlap of the lumen of the gallery. Which system curved plates attached to the bottom vibroresearch, also made of a material with a volume weight volume weight of water, are installed in consecutive cross-sections along the length of the galley and is confined mainly to the increase in bandwidth in the initial part of the gallery and further stabilizing effect. This approach to design can increase the flow rate to approximately 30%. The combination of pressure and gravity modes of movement and gave rise to the creation of new technical solutions. Therefore, it can be noted that the stabilization of the flow rate of the discharge is achieved of blavod the number of simultaneous step changes in flow direction due to sharp turns in the splitting of the jet in the initial part of the gallery. Create a rotation in front of the wall and plate, compression, and further loss of energy to create rotational flow, which is formed at the beginning of the discharge pipe that is the reason in the end for steady and uniform flow of water in the pipe end.

The originality and simplicity of solving the above construction provides protection from sediment in the channels of the chutes with sufficient accuracy the quality of stabilization of the flow, as when a wave, and Bessonova modes. The presence of ledge-threshold before vibromechanical also creates a lifting of the flow and the movement of transported sediment in suspension and floating debris through vaporised in transit the channel, and thereby the hinge and the lattice rods are prevented from destruction.

Profile and resilient material curved plates attached to a bottom end to vibroresearch, allows you to move (bend) in the direction of openings in the lattice. When this debris is constantly breaks away from the grid, because the grid set on the curved ends thereof in the direction of flow of water, sediment and debris continuously moving stream of water along the length of the lattice and outside of it in transit the canal. This protects galleries are also drawn from the sediment at the idle discharge in automatic mode. This period on the structures and drainage systems accounted for the ing half and more than just the time of year.

While the outlet flow of water through the openings of the lattice plate thibaudia only by the amount necessary to pass the required flow of water in the initial part of the gallery, thereby increasing the structural space between the rods vaporised, which increases the throughput of the device.

The total number of which sections of the plates from the bottom of vaporised take depending on their destination and sizes. The path length of the gallery is divided into a maze of ledges and a stepped arrangement of the plates. So, making two zigzag turn, the stream is sent to a discharge pipe, forming a front opening area of the helical motion of the fluid constant mass of water. Resistance along the length of the galleries are large, which has a positive impact on the change in the wave structure of the flow at the entrance to the gallery. The resistance increases by about 3-5 times or more. Screw the rotation of the nucleus of the liquid in the final part of the gallery before the inlet of the discharge pipe looks the most dense cross-section in comparison with the known device. It should also be noted that the length of the gallery is divided into working and non-public parts. Workplace gallery overlap the proposed elements so that its entire length was provided and the removal of small fractions of sediment ol the water water in the tap. The estimated value of consumption of the initial part of the gallery is assigned depending on the design of the order of 7-10% of the total consumption of the gallery. Hence, the working part of the length of the gallery based on the hydraulics of flow with variable mass taking into account the helical flow in the gallery still not fully resolved. The thread itself forms a section of the helical motion at the opening of the outlet hole shutter. In turn, the installation length of the closed gallery of hydraulic resistances in these conditions leads to the complete elimination of the failed course at the end of the discharge pipe in the downstream, thus providing a uniform flow stream for mount.

Based on the foregoing, the authors claim that the proposed solution meets the criterion of "Significant differences".

Figure 1 shows the discharge-flow sensor in the plan; figure 2 - section a-a in figure 1; figure 3 - node 1 in figure 2; figure 4 is the same as node 1, the rod lattice diamond-shaped cross-section.

The discharge contains water intake gallery 1, made with a sloping bottom 2 between the inlet 3 and rapid transit channels with the wave structure of the flow. The output along the length of the gallery is connected with the outlet pipe 5 (channel)in the input section of which is mounted a shutter 6 with lifting mechanism.

The water intake hole 7 gallery 1 protected VI is foreshadow 8 from receipt debris and large stones. Gallery 1 is bounded from above by a dividing wall 9, the upper end connected with the free ends bent downward 10 vaporised 8, and the lower end of the separating wall 9 is connected with the wall of the pipe 5. Vibroresearch 8 are connected by a hinge 11 with a transverse ledge-threshold 12 flush into the supply channel 3. Gallery 1 height cross-section throughout its length constant. Vibroresearch 8, which is equipped with a device made in the form of separation curvilinear in cross section of the plates 13, are installed in front of the inlet channel 3 in the cavity gallery 1 (initial part) in a row, consistently oriented along the length of the inlet 7 of the gallery 1. The upper edges of the plates 13 attached to the bottom terminals vaporised 8. The length of the gallery installed hydraulic resistance, made in the form of transverse protrusion 14 and the flat plate 15 attached to the base of the ledge and the edge of the bottom plate to the ceiling separating wall 9. The bottom 2 gallery 1 is equipped with a concave transverse plate 16 is curved in the direction of the end portion galleries 1 and is placed between the lip 14 and the plate 15 with a gap to the bottom 2 and to the wall 9. The length of the gallery 1 made in the form of zigzag conduit in the direction of its end portion. Which device in the form of curved plates 13 are attached to the terminals of libraries the TCI 8 can be rotated and made of flexible material with a volumetric weight a large amount of water weight. Plate 13 due to the fact that is made of elastic material with a specific weight, high specific weight of water, and can move in the direction of the initial section of the dividing wall 9 due to the high-pressure flow, open the gaps between the rods vaporised 8. At the same time open up the gaps between adjacent plates 13, consistently oriented along the length of the hole 7. In the absence of water in the channel 3 and the idle discharge plate 13 on the contrary automatically moved to the terminals of vaporised 8 and cover the gaps between them. This provides additional protection of the bottom of the gallery into gallery random sediment from the sides of the channel (with slopes etc).

On the water outlet structures, drainage systems, this period is one-half or more of all the time of year.

Trash vibroresearch 8 may have a longitudinal rods diamond-shaped cross-section (figure 4), and their ends are also provided with elastic elements 10. By wrapping diamond shape studs trash vaporised 8, you can increase its throughput (wave motion) up to 10% on channels with Swinburne and turbulent flow.

The operation of the device is as follows.

High-speed flow from the inlet channel 3 through the slots of vibrare etki 8 presses on the plate 13 and opens only on the value (counter-clockwise), necessary to pass the required flow of water, thereby increasing the structural space between the plates 13. Moving along the bottom of the channel 13 carrying sediment and coming to cross the threshold of 12 are in suspension, i.e. resuspension of them in the upper layers of the flow over the bottom-hole 7 and the rise of solid particles with a bulk density greater than one, while debris also rises. The movement of sediment in suspension occurs due to the vertical component of velocity. Next, the translation part of the transported sediment coarse fractions, the characteristic size which exceeds the size of vaporised 8, goes downstream transit channel 4, due to the oscillatory movements of the rods vaporised 8 on the elastic elements 10, the bent ends of the rods vaporised 8, located on the dividing wall 9, the hinge 11 is connected to the ledge-threshold 12, i.e. provided the amplitude of the lattice vibrations and the speed turbulent flow in the direction of transit of the canal.

The flow of water coming into a curved plate 13, is given to consumers through the outlet pipe 5 and sets the opening of the shutter 6. At the same time the flow of water has longitudinal and transverse non-stationarity of the velocity, flowing plate 13, also creates a mode of self-oscillations of vaporised 8 thanks and elastic ele is entam 10 at the ends of the rods vaporised 8, and thereby prevents clogging of vaporised 8. When this occurs the pressure on a curved plate 13 from the entrance to the gallery 1. Simultaneously with the receipt of the required water flow in gallery 1, the water comes into rotational motion. When tightening the part of the kinetic energy of the translational motion of water flow goes into the kinetic energy of rotational motion. Upon receipt flow and increase pressure in the supply channel 3 in gallery 1 increases the pressure inside it, the flow through the gaps between the lip 14, the curved plate 16 and plate 15 enters the lower part of the gallery 1. Therefore, at this stage also occurs rotational movement of the flow approaching the water outlet hole with the pipe 5.

The flow, getting in this step of the conduit has a helical movement and interacts with the plates 15 and 16, in the reduced space screw air cord at the end of gallery 1, causing additional properties stabilize the flow of water in the discharge pipe 5. Increases compression helical flow flowing out of the gaps between the constricted part of the protrusion 14, the curved plate 16 and plate 15 by the dependence ofε=C& Radic; Ho ,

which leads to reduction of the flow of discharge µ is inversely proportional to √Ho. The degree of resistance can be increased by narrowing of the internal cavity gallery 1 in the presence of zigzag conduit. Constant circulation flow of fluid in the labyrinth of galleries created changes in the hydraulic resistance provided zigzagoon the conduit inside the gallery 1.

The device allows you to take stable purified water flow in the irrigation period of operation and does not require manual control of process water to clean sediment. The hinge 11 vaporised 8, you can pick it up for inspection and repair of the culvert.

The increase in total square holes vaporised 8, rotation, and dispersal shut-elastic systems curved plate 13 in the direction of travel of the wave flow allows to achieve uniform distribution of sampled flow across the width of the gallery 1 and increased throughput in the initial part of the discharge, and also exclude pulses and bursts on the surface of the water.

Hence, it is clear that pressure is distributed in such a flow by hydrostatic law, where a spiral motion and N=const, the velocity of all particles is equal to:=C (where C is a constant of integration). According to theory of wave energy, monodentate the following conclusions. The total energy of a wave is the sum of the potential and kinetic energy. The amount of potential energy of a wave depends on the height of fluid particles relative to their static position. The middle line dividing the height of the wave into two equal parts, is raised above the static liquid level on the value of ho.

According to wave theory, the amount of potential energy of one wavelength within a band of width b=1 in the direction of propagation of the entire depth can be determined by the formula

En=γh2λ16.

The kinetic energy of wave motion within the length of one wavelength and band width=1 throughout the depth quantitatively equal to the potential energy

Ek=γh2λ16.

Wave flow from the inlet channel does not exert its influence and direction of a given water flow in gallery 1, thereby compensating surplus consumption resulting from uneven distribution of speeds and costs in the frontal and caudal part of the wave that provides a high stabilization of RA is running, supplied through the outlet in the outlet pipe 5. The design of the outlet-stabilizer allows you to translate the stormy wave flow in the quiescent state at the end of the discharge pipe 5, is characterized by high reliability. The gallery isn't filled up with sediment and debris as they pass over the water intake hole as due to the protrusion-threshold 12, and due to the presence of vaporised 8 and hinge 11, which improves the cleaning efficiency of the grating. Which system consisting of a curved plate 13, in the process increases the degree of vibration of the lattice 8 (provided the amplitude of the lattice vibrations) with hinge 11 on gallery 1. In addition, the plate 15 in the process of discharge increases the degree of rotation of the spiral flow of water at the end of gallery 1.

The economic efficiency of the proposed culvert-flow sensor is to combine in one technological cycle of optimal intake stable water flow and efficient purification of water from sediment and debris.

1. Culvert-flow sensor water channel with turbulent regime of flow, including the supply and transit channels, regulating the speed and bottom of the water intake gallery with horse part of the receiving hole, covered by a grate, and in lower part of the separator, the second wall, coupled with the bottom of the transit channel, and bottom water intake gallery connected with a discharge pipe through the water outlet hole, wherein, with the aim of increasing efficiency by stabilizing the flow rate of water discharge due to a change in the flow resistance when the wave structure of the flow, which it has in the form of a separation curvilinear in cross section plates arranged opposite the inlet channel in the gallery in a row, consistently oriented along the length of the hole gallery, with the upper edges of the plates attached to the bottom bars, the ends of the rods bent down and supported on the separating wall coupled to a bottom of the transit channel with the possibility of creating self-oscillations of the lattice, while the gallery is made constant along its entire length by the height and bottom, made sloping, and divided lengthwise into sections by transverse protrusion and a flat plate attached to the base of the ledge and the edge of the bottom plate to a dividing wall with a partial overlap in height bore galleries with clearances to the bottom of the gallery, and the bottom it is equipped with a concave transverse plate between the plate and the flat plate in the form of a tapering along the length of the gallery zigzag conduit in the direction of the tip part.

2. Water is the issue-flow sensor according to claim 1, characterized in that the curved plate attached to the grid, and the bent ends of the rods are made of flexible elastic material.



 

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1 dwg

FIELD: agriculture, particularly irrigation ditches, namely gravity flow, open channel water distribution systems to control water flow in irrigation canal with water consumers, which take water along the canal.

SUBSTANCE: water-distribution system comprises irrigation canal with head gate, sealed chamber with sliding float communicating with upper pool and discharge means through three-way gate installed in supply pipeline, three-way gate control sensor, movable water consumer with water-intake means, blocking structure made as elastic shell and water level sensor. Water-intake means of water consumer is provided with sheet fixedly secured to upper end part thereof and adapted to block upper part of water flow. The sheet is associated with spherical elastic shell, which blocks remainder water flow part and provided with balancing means. The balancing means is located around spherical elastic shell perimeter. The sheet is linked to head part of water-intake means by flexible tie. Hollow body is connected to outer side of water-intake means. The hollow body is adapted to receive water level sensor made as float with vertical post. The post has two parallel contact rods connected to one post end and associated with power source. The contact rods cooperate with trolley cables in horizontal plane. The trolley cables are carried by masts installed on irrigation canal berm and distributed along the full canal length. The trolley cables are connected to power source through spring-loaded contact rods arranged in water-intake means and receiver/transmitter unit. Time delay unit is connected with gate control sensor. Sliding float is connected with head gate through kinematical connection means. Movable water consumer is provided with programmable control device, which controls water-intake means location height.

EFFECT: reduced operational costs, decreased water consumption for agricultural crop watering, decreased water reserve volume, simplified structure and reduced costs of irrigation system object construction.

1 dwg

FIELD: hydraulic engineering, particularly devices to maintain predetermined water level in contour-ditches of rice irrigation system.

SUBSTANCE: water spillway device adapted to discharge water from upper pool of contour-ditch comprises partition with delivery outlet to be closed with inclined gate arranged from lower pool side and supported by horizontal pivot pin, control chamber and elastic sealed vessel located in control chamber. Control chamber includes delivery pipe having inlet orifice provided with valve, which is connected with upper pool float through rod. Elastic sealed vessel comprises discharge orifice having diameter smaller than that of delivery pipe and acts on piston cooperating with gate through rod and hinge. The gate has side partitions and sealing means.

EFFECT: possibility to use natural atmospheric precipitations for irrigation purposes, prevention of crop losses due to increased accuracy of necessary water level maintenance in rice contour-ditches and provision of optimal rice irrigation regime along with decreased labor inputs.

1 dwg

FIELD: irrigation, particularly artificial water canals.

SUBSTANCE: method involves punching perforation orifices in film web; cutting furrows; breaking down and spreading soil lumps; laying perforated film webs along furrow perimeter and securing film web edges to berm. Number of perforation orifices made in film web increases from front furrow end to rear end thereof. Method is realized with the use of device including frame carrying working tool used for furrow cutting. Spreader, perforated film web accumulation means and pressing rollers are serially installed behind the working tool. The spreader comprises two rows of paired rollers freely rotating about their axes fixedly secured to shaft by means of bearings and loaded with spring. Roller is installed behind perforated film web accumulation means. The roller may perform limited vertical movement and is pressed with spring to furrow bottom and sides. Pressing rollers and scrapers are arranged behind the roller.

EFFECT: prevention of irrigation water losses during furrow filling with water; elimination of plant rootage damping-off.

4 cl, 3 dwg

Water lift unit // 2318956

FIELD: irrigation systems, particularly ones to be used with opened water streams using energy source, for instance hydraulic level drop at retaining structures.

SUBSTANCE: water lift unit comprises chamber with controllable water inlet, water outlet pipe and water lifting means made as pump. The chamber has orifice receiving water inlet flow regulation valve. The valve has float, rod and guiding means. The chamber is connected with water outlet pipe provided with water turbine having shaft extending into chamber interior and communicated with shaft of water lifting means pump.

EFFECT: possibility to create pressure difference enough for water lifting along with possibility to retain desirable structure throughput.

2 dwg

FIELD: construction.

SUBSTANCE: invention is related to nondestructive methods for control and diagnostics of operational condition of tray channels. Device for diagnostics and forecasting of technical condition of tray channels in irrigation systems includes frame, antenna blocks and motion sensor. Device is equipped with processing module. Frame copies channel shape and is equipped with support rollers. Antenna blocks are arranged along frame perimetre.

EFFECT: makes it possible to improve quality of tray channel operational monitoring, to speed up their inspection with nondestructive test methods and to carry out forecasting of remaining service life of tray channels.

3 dwg

FIELD: construction.

SUBSTANCE: invention is related to operational monitoring of irrigation system tray channels technical condition in hydrotechnical construction. In method for performance of operational monitoring with the help of nondestructive check instruments and with application of ultrasonic method and method of impact pulse, reinforced concrete tray is separated into three survey zones by detection of specific defects and damages for each zone. Zone 1 is investigated to detect defects and damages that lead to destruction of tray bottom part. Zone 2 is investigated to detect skew cracks in tray board. Zone 3 - to detect long cracks, which lead to collapse of tray board. Using obtained data, technical condition of irrigation system tray channels is predicted.

EFFECT: more accurate assessment of stressed-deformed condition of reinforced concrete trays of irrigation channels and to predict their remaining service life.

2 cl, 3 dwg

FIELD: construction.

SUBSTANCE: device comprises a trench antifiltration curtain embedded into a confining layer with a vertical water-impermeable flexible screen and a trench filler from filtering material, closed along the perimetre of the dried area, inside which there is a secured site, a device for deep directed distributed supply of fresh water into the soil massif of the dried area and the secured site and a drainage device. The drainage device is made in the form of a drainage vertical well (wells) with depth below the level of ground waters. The device for fresh water supply is made in the form of water-absorbing pits (pit) with depth to the level of ground waters. In the first version the drainage well is installed in the centre of the secured site and is connected with the drainage horizontal wells arranged ray-like in the soil layer with ground waters under the secured site. Pits are arranged along the secured site perimetre in the medium of filtering material of the antifiltration curtain trench filler. In the second version two and more drainage wells are installed at one side of the secured site and are connected to each other by a drainage header. The device for water supply is made in the form of at least one pit arranged along the curtain perimetre in the medium of the filtering material of the curtain trench filler. In the third version two drainage wells are installed at one side of the secured site and are connected to each other by a drainage header and a slot drain installed at the depth below the ground waters level. The well is made at the opposite side of the secured site and is located in plan in the middle part of the trench filler from the curtain filtering material. In the fourth version two drainage well are installed one at two sides of the secured site, every of which is connected to drainage horizontal wells arranged ray-like in the soil layer with ground waters under the secured site. The device for water supply is made in the form of at least two pits, every of which is installed in the medium of the filtering material of the curtain trench filler. In the fifth version four drainage well are installed one at four sides of the secured site, every of which is connected to a drainage horizontal well arranged ray-like in the soil layer with ground waters under the secured site. The device for water supply is made in the form of at four pits, every of which is installed at the border of the dried area in the medium of the filtering material of the curtain trench filler.

EFFECT: increased efficiency of meliorative system operation and lower salt content in water-absorbing soil massif and drain flow down to rated parameters of mineralisation.

5 cl, 14 dwg

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