Rotary structure for open channels

FIELD: construction.

SUBSTANCE: structure comprises a chamber placed between a supply channel 1 and a drain channel, and the bottom of the chamber is arranged below the bottom of the supply channel at the elevation of the drain channel bottom. The chamber is divided into galleries with a wall 3, parallel to the axis of the drain channel, with a horizontal shelf with a visor in the upper part, directed towards the supply channel. The bottom of the supply channel is made with a slant at the sharp angle to the horizon. In the end of the supply channel 1 there is a vertical wall 9 installed, as well as a jet-directing system. The jet-directing system is made in the form of vertical longitudinal walls 10, ends of which are aligned along the bottom of the inclined section parallel to each other and at the angle 10-15° to the axis of the closed gallery. The walls of the bottom of the inclined section under a separating shelf are arranged with reducing height. In the end of the separating shelf there is a vertical plate installed with a gap to the bottom of the drain channel with a hinged joint 13 and with a spring, which is connected to the separating shelf. A protective visor 15 is fixed to the side wall of the gallery above the horizontal separating shelf.

EFFECT: higher efficiency in operation due to reduced water head upstream a unit with wave structure of a flow.

5 cl, 4 dwg

 

The invention relates to hydraulic engineering and can be used to control turbulent flow at the turn of open channels.

Known rotary construction for open channels, comprising placed between the inlet and outlet channels of the camera divided by the gallery wall parallel to the axis of the discharge channel with a visor at the top, pointing towards the inlet channel, the bottom of the inlet channel is made with a bevel at an acute angle to the horizon, while it is provided with a horizontal canopies, fixed to the middle part of the front walls of the gallery, and the angle of the bevel is 10-13°, and the width of the visor second gallery more visor first width of the visor gallery 1.5-2.0 times, and the length of the visor first gallery in 1.5-2.0 times the length of the visor the second gallery (USSR Author's certificate No. 1167269, CL EV 13/00, 1981).

The disadvantage of this construction is that the transient channels with steep slopes, and has significant reserves of water energy, the mode water flow in such channels violent or Overbury (high wave), increase the pressure on the separating wall gallery, limited area equal to the width of the galleries cause a certain part of the damping of the rotary flow and the flow velocity at the outlet in the outlet channel forms article shall icost, i.e. the impact on the wall of the mass flow of water, spread a wave for a long distance. Thus, it causes an increase in building height of the tailrace and the costs of construction. In addition, there is no uniform distribution of velocities, oriented along the tailrace. Afflux vertical walls increases the building height and creates a reverse wave above the galleries with visors, which dramatically reduces the bandwidth of the structure. The axis of the screw thread extends down through the open discharge channel (no hydraulic resistance), there is no regulation of the hydraulic structure of the turbulent flow as at the entrance to the gallery and on the way out of them. All this negatively affects the collision of flows in a discharge channel, spreading the excitement over the channel. In addition to bandwidth galleries change in relative consumption of each gallery is not interconnected with the distribution depending on the relative flow of the tailrace (Qresp.and flow in the channel - flow (Qmax)that violates parallelisation forward movement of the input flow in the discharge channel and contributes to sbeinati in the open discharge channel. This is not a high throughput famous structure p and the cost of construction increases. In addition, there is provided a symmetric splitting of the stream, there is provided the maximum possible damping of the energy at the turn of the channel.

It is also known rotary construction for open channels containing placed between the inlet and outlet channels of the camera, the bottom of which is located below the bottom of the inlet channel at the level of the bottom of the tailrace, and the chamber is divided into the gallery wall, parallel to the axis of the discharge channel with a horizontal shelf with a visor at the top, pointing towards the inlet channel, and the bottom of the inlet channel is made with a bevel at an acute angle to the horizon (USSR Author's certificate No. 918391, CL EV 13/00, 1980).

The disadvantage of this construction lies in the uneven distribution of water flow across the width of the discharge channel, and can result in spillage of construction. Additionally, there is no necessary division of the flow and deformation of turbulent flow at the site of rotation in a closed chamber with insufficient length of rotation, there is provided the maximum possible damping of the energy - low bandwidth. When hitting a vertical wall having perturbations in wave form, i.e. oblique hydraulic jump. When limited to the width of the channel and turn the front of the jump reaches the opposite wall and wasnike the reflected oblique hydraulic jump and a discharge channel formed by the wave motion.

The aim of the invention is to increase efficiency by reducing backwater before the node when the wave structure of the stream.

This objective is achieved in that the structure containing placed between the inlet and outlet channels of the camera, the bottom of which is located below the bottom of the inlet channel at the level of the bottom of the tailrace, and the chamber is divided into the gallery wall, parallel to the axis of the discharge channel with a horizontal shelf with a visor at the top, pointing towards the inlet channel, and the bottom of the inlet channel is made with a bevel at an acute angle to the horizon, the final section, which is equipped with the system in the form of a vertical longitudinal walls, the ends of which are oriented along the tailrace in parallel to each other and at an angle of 10-15° to the axis of the discharge channel, and the walls of the slope of the bottom of the inlet channel in the direction of the camera axis, which is coupled with the discharge channel, performed with decreasing height. In addition, the walls from the top and bottom are made with decreasing length and height (immersing them in the thread), and are located below the horizontal shelf, and the chamber is divided into galleries into two unequal parts, one of which is connected to its input section with a bottom slot in the form of rounded in terms of a knee with a narrowed transition portion and an end section of the vertical plate, installed with a gap relative to the bottom of the gallery, and pivotally attached to the upper edge of the horizontal shelf and attached to it a spring, attached to the shelf in its end portion, and a vertical side wall of the chamber provided with a protective visor broken and concave shape, placed on a horizontal shelf, and has a length greater than the length of the shelf. At the output below the protective visor and width of his set, which the folding plate in the form of a shutter pivotally connected to the corner element.

On the basis of the interrelation and interdependence of the main elements of the structure, the rapid flow of water from the inlet channel is divided into many equal parts consumption, and through the sleeve ends of the vertical walls is directed below the divider shelf in the form of a widening of the swirl flow. Therefore, under distribution shelf are provided with centrifugal force and twisting in opposite directions, which provides a good extension of the stream below the divider shelf. When tightening the thread appears centrifugal force, under the action of which the total flow is connected and enters the discharge channel, and merges smoothly with the flow coming over the dividing shelf. To prevent possible splashing of water installations is on a vertical plate with hinge and attached to the spring, attached to the shelf in its end portion. When this protective shield overlaps a portion of the dividing shelf has broken and a concave shape and has a length greater than the length of the shelf.

Such design structures to rotate channels ensures uniform distribution of the linear expenditure in the cell, the symmetry of the pressure distribution on the walls of the chamber, smoothes the output wave and extinguished, and speed around the living section in a discharge channel have the length to the same value.

In addition, with the increase of pressure inside the closed gallery increases the pressure on the spring-loaded with the hinge plate in the end portion of the dividing shelf, which compresses the spring, thereby compensating wave, possibly resulting from the mixing of flow separation under shelf (reduction of pulse pressure).

In order to eliminate sbinet and reduce the magnitude of the current velocities (longitudinal component of the instantaneous velocity near the bottom of the bottom)must flow in the inlet channel is evenly spread out, giving it a surface structure. This task can be performed at the device additional splitting device, the construction of which would allow to distribute the flow across the cross-section, to reduce the magnitude of the velocities due to the dissipation of energy and the midrange is t create surface flow and bottom.

The proposed design of structures with a degree of expansion of the flow system under which a dividing shelf and communication with other nodes constructions reduced sbinet flow at the beginning of the tailrace on cropped land. The minimum angle of the arc of the tribe closed the gallery fits on the rotation of the discharge channel, and a protective visor with its elements covers the part above the dividing shelf and directs the flow to the second open gallery, and part of the flow of water together in a common flow smoothly. The proposed facility shall provide the necessary deformation of the turbulent flow at the site of rotation of least length.

Thus, the structure allows for a short stretch of the stream of water to extinguish the primary energy, while the recovery of the steady-state mode in a discharge channel, i.e. using the section, which system below the divider shelf, gradually submerged in the stream length and height, and when opening holes by raising the spring-loaded plate (vibration plate that smoothes the crest of a wave of water flow).

Such execution of construction at the turn of the channel, according to the authors, was not known and meets the criterion of "Significant differences".

1 shows a rotary structure, a top view; figure 2 is a section a - a in Phi is .1; figure 3 - cross-section B-B in figure 1; figure 4 is the same, with which the bumper wall with the water outlet holes.

The structure contains the inlet 1 and outlet 2 channels located in a plane at an angle of 90° to each other, a chamber separated by a dividing wall 3 into two unequal parts 4 and 5. The bottom chamber is located below the bottom of the inlet channel 11 at the level of the bottom of the discharge channel 2, and the bottom of the inlet channel 1 in front of the camera made the advanced sloped section 6. Luggage made in the plan as knee by means of a closed top horizontal separation shelf 7 with a dividing wall 3 that is parallel to the axis of the discharge channel 2, and the horizontal separation shelf 7 is located in the same plane with the bottom of the inlet channel 1 with a bottom slot 8 with the location of the long parts of it extended across the inclined section 6. At the end of the inlet channel 1 is set to a vertical wall 9 and which device made in the form of vertical walls 10, mounted in a row parallel to the axis of the inlet channel 1, and oriented with the extension on the bottom of the inclined section 6 and at an angle of 15-25° to the axis of the inlet channel. The ends 11 which are oriented to the axis of the closed gallery 4 at an angle of 10-15°. The height of end wall 11 below the divider shelf 7 decreases from conductive decl the frame section 6 to the axis of the discharge channel 2, and their length from horse wall 11 to the grassroots.

Tapered transition portion 9 of the inlet channel 1 has a height h and width B, and the main part of the gallery 4 has a height of hxand the width bxand the height of the narrowed portion 9 of the inlet channel 1 is assigned to the inequality hx≥2hxthe width of the gallery is appointed from the inequality bx>b1and the wall 11, which element in the initial part equal to the height of the top edge of the dividing shelf 7 that is parallel to the plane of the bottom of the inlet channel 1.

At the end of the dividing shelf 7 is installed to the bottom of the discharge channel 2 with a gap vertical plate 12 with hinge 13 and spring 14, which is connected to the dividing shelf 7 and angled towards the flow. Protective visor 15 attached to a side gallery 5 above the horizontal separation shelf 7, made with broken bent down visor and has a length greater than the length of the dividing shelf 7, located at the beginning of the discharge channel 2.

Protective visor 15 at the output and the width of its articulated which the folding plate in the form of a shutter - camera 16 connected by means of cable 17 with the mechanism 18 lift installed on the service bridge 19.

The construction works as follows.

Water coming in under odashima channel 1, divided into parts equal to the flow-through sleeves with dividing walls 10 extending along the bottom of the inclined section 6 goes on the end wall 11, being submerged in the stream, and, whirling on expanding the area under a dividing shelf 7, provides good damping of the energy flow. When turning a part of the kinetic energy of the translational motion of water flow goes into the kinetic energy of rotational motion and loses some energy, where the individual parts under the shelf are connected to a common flow through a narrowed transition portion 8 of the inlet channel 1 in gallery 4, and the other part of the flow is diverted above the dividing shelf 7 under the protective visor 15, there is a collision, and also the stream loses some kinetic energy due to rotation in the vertical and horizontal planes, then goes to the gallery 5, there is a damping of the energy flow. The output flow from under the protective canopy over 15 gallery 5 change by creating the necessary connection of the discharge in the discharge channel 2 due to the lowering or raising of the shutter chamber 16 by means of the mechanism 18. By adjusting this angle, you can reduce or increase the length of the departure of the jet along the length of the channel 2 to achieve an optimum combination of flow depending on the speed of the water under the visor 15.

the thus, the Bouncing off the walls of the gallery 4, the flow expands and rises across the section of the gallery 4. There is intense stirring, turbulization, aeration, collision of the flows and the interaction with the walls 11 and the elastic plate 12. As a result, and the collision of the streams and over the dividing shelf 7 under the protective canopy 15 with a valve chamber 16, the water calm is connected in a common thread in the beginning of the discharge channel 2, coming with two tiers.

On the plate 12 with the hinge 13 and hydrostatic pressure of the flow, move it, compressing the spring 14 increases the flow area between the bottom of the channel 2 and the rack 7, which prevents the spread of possible (residual) waves arising under the separation shelf 7. When reducing the hydrostatic pressure of the water in front of the plate 12, the stream velocity decreases, the plate 12 is pressed by spring 14 down and cavity gallery 4 is filled with water, i.e. automatically regulates the amount of opening of the outlet gallery 4. Thus it enables the recovery of a specified mode, which allows efficient use of the section which system gallery 4. According to the variant of figure 4, the flow of water over the dividing wall 7 in the collision with the vertical wall of the chamber 5 under the protective canopy 15 with a corner element, vypolnen is in the form of a shutter-the camera 16, losing is also part of the kinematic energy due to rotation, then comes the second part of the gallery 5. While draining it is the direction of water flow, which fender wall of this corner element 16 with a hinge 17 at the expense of dynamic pressure directed stream.

Thus, on the basis of the interrelation and interdependence of the rotary structure, due to the sequential steps is protected from the spread of channel 2 of excitement, the flow is almost evenly distributed over the cross section of the discharge channel 2.

1. Rotary construction for open channels containing placed between the inlet and outlet channels of the camera, the bottom of which is located below the bottom of the inlet channel at the level of the bottom of the tailrace, and the chamber is divided into the gallery wall, parallel to the axis of the discharge channel with a horizontal shelf with a visor at the top, pointing towards the inlet channel, and the bottom of the inlet channel is made with a bevel at an acute angle to the horizon, characterized in that, to improve performance by reducing backwater before the node when the wave structure of the flow, the final section of the inlet channel, which is equipped with the system in the form of vertical longitudinal walls, the ends of which are focused on the bottom decl the frame section in parallel to each other and at an angle of 10-15° to the axis of the closed gallery, the walls of the bottom of the slope below the divider shelf made with decreasing height.

2. The construction according to claim 1, characterized in that the walls from the horse to the grass-roots performed with decreasing length and are located below the horizontal shelf.

3. The construction according to claim 1, characterized in that the chamber is divided into galleries, into two unequal parts, one of which is connected to its input section with a bottom slot in the form of rounded in terms of a knee with a narrowed transition portion and an end section with a vertical plate that is installed with a gap relative to the bottom of the gallery, and pivotally attached to the upper edge of the horizontal shelf attached to a spring that is attached to the shelf in its end part.

4. The construction according to claim 1, characterized in that the vertical side wall of the gallery is equipped with protective visor broken and concave shape, is placed above the horizontal separation shelf and has a length greater than the length of the shelves.

5. The construction according to claim 1, characterized in that at the outlet from under the protective canopy and width it installed hinged pivotally connected, which plate is in the form of a shutter-camera.



 

Same patents:

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.

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2 cl, 4 dwg

FIELD: construction.

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2 cl, 4 dwg

FIELD: agriculture.

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2 dwg

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5 cl, 14 dwg

FIELD: construction.

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2 cl, 3 dwg

FIELD: construction.

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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.

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2 dwg

FIELD: irrigation, particularly artificial water canals.

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4 cl, 3 dwg

FIELD: agriculture, in particular, desalinization of saline soil of agricultural lands.

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4 dwg

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SUBSTANCE: method involves feeding water to land to be desalinated; cutting slits therein; irrigating strips between slits; removing salt from slit wall surfaces and spilling soil thereon, with slits being provided at distance from one another which does not exceed doubled value of capillary transfer of soil moisture at land under desalination process and slit cutting depth being set so that it exceeds value of capillary lifting of moisture by soil at land under desalination process; forming ridges with two sloping surfaces on strips between slits; placing pipelines with droppers thereon, said pipelines being connected to water supply main; covering strip surfaces with water-impermeable shields made from hydrophilic material; fastening shield edges in upper part of slits; supplying water from droppers up to termination of desalination procedure, with following interrupting of water supplying process; moving soil layer with salt from slit walls onto slit bottom and forming water-impermeable layer of hydrophilic material above said soil layer; leveling slits.

EFFECT: reduced consumption of washing water, increased efficiency in soil desalination, decreased consumption of labor and costs for extraction, conveyance and disposition of salts settled on slit walls.

3 dwg

Automatic spillaway // 2283920

FIELD: hydraulic equipment, particularly to drain water from tailing pits, for closed drainage systems formed in zones characterized by severe climatic conditions.

SUBSTANCE: spillaway comprises service water vessel, shutoff member made as lower water level regulator arranged in discharge pipeline, upper water level sensor and magnet, which cooperates with magnetic mass when shutoff member is in its closed position. Float-type lower water level control member is installed from discharge pipeline interior side and is used as heat insulation means. Upper water level sensor is made as float and connected to shutoff member by means of vertically-aligned adjusting rod, which regulates upper water level. Magnetic mass is located on lateral pipeline. Magnet is installed on shutoff member.

EFFECT: increased leakage prevention, elimination of service vessel cooling and, as a result, extended field of application.

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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