RU2760431C1 - Surface runoff inlet and method for its installation - Google Patents

Abstract

FIELD: surface runoff inlets.SUBSTANCE: inventions group relates to the field of surface runoff inlets. The inlet is installed in a square on a compacted base, contains a working chamber and a floor slab, on top of which a hatch is installed. A perforated sleeve, consisting of a protective screen and a perforated removable cover, is installed on the hatch of the stormwater inlet at the same level as the square. Perforation is a hole with a diameter smaller than the fraction of the coating material of the square. A water-permeable geotextile is placed around the perforated sleeve for the entire thickness of the covering of the square. The method for installing a stormwater inlet includes making a pit for installing a planned inlet, preparing a compacted base for an inlet, installing an inlet on a prepared base, connecting a stormwater pipe to an inlet, installing a reinforced concrete floor slab, backfilling a pit and installing a hatch. A metal perforated sleeve is installed on top of the hatch, the inner and outer surfaces of the walls of the stormwater inlet and the reinforced concrete floor slab are waterproofed. After that, backfilling of the pit is carried out with layer-by-layer soil compaction. Above the compacted soil around the perforated sleeve, a square is organized, which is a layer of crushed stone with a fraction of 20-40 mm and a thickness of at least 200 mm, placed on a layer of compacted sand with a thickness of at least 100 mm, laid on top of an anti-filtration screen made of bentonite mats. For the entire thickness of the covering of the square around the perforated sleeve with a bend under the anti-filtration screen, a water-permeable geotextile is laid.EFFECT: improvement of the efficiency of the inlet is provided.6 cl, 2 dwg

Description

The invention relates to storm water discharge and other devices designed to receive and remove rain and melt water, and can be used in oil and gas processing, chemical and other industries.

Known storm inlet (see RF patent for invention No. 2703201, E03F 5/04, 5/06, publ. 15.10.2019), including a working chamber with a wall and a side, a bottom, a pipe exit from a storm inlet and a cast iron grate, while the well is equipped with a hydrodynamic device in the form of flow vortexers, consisting of barriers-flaps installed at an acute angle and transversely to the incoming flow and located along the perimeter of the working chamber lattice of the well.

The closest in technical essence and the achieved result is an engineering structure and a method for its installation (see RF patent for invention No. 2632593, E02D 29/12, publ. 06.10.2017), containing a well made of polymer material with a neck, a chute part and a working chamber, and a reinforced concrete unloading plate with a hole for installing a hatch, while the unloading plate is supported on the compacted soil and on the neck of the polymer well through the compacted base to form a structure on an elastic foundation. The method of installation of this engineering structure includes a foundation pit for installing a well, a foundation made of a sand or sand-cement layer and a base plate under the well, then a well is installed on the prepared base and fixed on the base plate, after which a pipeline is connected to the well, a reinforced concrete slab is installed overlappings, backfilling of the pit, installation of the hatch and pavement arrangement.

The disadvantage of the known devices is the lack of means for filtering litter, protection against erosion of sand and getting it into the stormwater well, which causes the need to carry out frequent manual cleaning of stormwater wells. The flow of water only through the hatch of the stormwater well contributes to a decrease in the efficiency of the stormwater well in terms of absorbing the volume of all incoming water. Also, with heavy rainfalls, large volumes of water are formed with a high flow rate, which, due to the lack of additional space for retaining liquid, may not have time to enter the stormwater well and pass over the grating of the stormwater well hatch. In addition, the known devices are not used for temporary networks, since they require only an asphalt or concrete pavement to be adjacent to the hatch and, thus, do not allow solving the problem of drainage of rainwater from crushed stone areas (pavements).

The technical objective of the present invention is to exclude the ingress of sand, crushed stone and other large debris into the stormwater well, to increase the surface area of the penetration of rain and melt water, as well as to solve the problem of wastewater disposal for temporary networks where a capital covering is not required.

The technical result consists in increasing the efficiency of the well by filtering rain and melt water entering the stormwater well and increasing the volume of water entering the stormwater well.

The technical result of the invention is achieved by the fact that in a device installed in a frame on a sealed base of a stormwater well, including a working chamber and a floor slab, on top of which a hatch is installed, according to the invention, a perforated sleeve is installed on the hatch of the stormwater well at the same level with the frame, consisting of a protective screen and a perforated removable cover, moreover, the perforation is a hole with a diameter smaller than the diameter of the material of the bob covering, and a water-permeable geotextile is placed around the perforated sleeve for the entire thickness of the bob coating.

In addition, the square is a crushed stone covering, placed on a layer of compacted sand, laid on top of an impervious screen made of bentonite mats.

In addition, the compacted base is a layer of crushed stone, on top of which concrete preparation is made with waterproofing of two layers with a bitumen primer primer.

The technical result of the present invention is also achieved by the fact that in the method of installing a stormwater well, including the construction of a pit for installing a planned stormwater well, preparing a compacted base for a stormwater well, installing a stormwater well on a prepared base, connecting a stormwater pipeline to a stormwater well, installing a reinforced concrete floor slab, backfilling of the pit and installation of the hatch, according to the invention, a metal perforated sleeve is installed over the hatch, waterproofing of the inner and outer surfaces of the walls of the stormwater well and the reinforced concrete floor slab, after which backfilling of the pit is carried out with layer-by-layer soil compaction, while over the compacted soil around the perforated sleeves organize a square, which is a layer of crushed stone with a fraction of 20-40 mm and a thickness of at least 200 mm, placed on a layer of compacted sand with a thickness along the edge At least 100 mm, laid on top of the anti-filtration screen made of bentonite mats, and for the entire thickness of the covering of the square around the perforated sleeve with a bend under the anti-filtration screen, a water-permeable geotextile is laid.

In addition, the compacted base is a layer of crushed stone with a fraction of 20-40 mm with a thickness of at least 300 mm, on top of which concrete preparation is performed with a thickness of at least 100 mm and dimensions at least 100 mm larger than the dimensions of the bottom of the stormwater intake. well in all directions.

In addition, on top of the concrete preparation, before installing the bottom and walls of the stormwater well, a glued waterproofing is arranged from two layers of waterproofing material with a bitumen primer primer.

Installation of a perforated sleeve on the hatch of the stormwater well at the same level as the frame, consisting of a protective screen and a perforated removable cover, with a hole diameter smaller than the diameter of the frame covering material, allows you to filter and remove crushed stone and other large debris entering the stormwater well, thereby increasing efficiency operation of a stormwater well. In addition, by changing the dimensions of the perforation of the sleeve, it is possible to place and adapt the proposed invention to a different type of caret coverage, since the proposed invention does not require that only an asphalt or concrete coating adjoin the stormwater well hatch. Thus, the installation of a perforated sleeve also allows the proposed invention to be used for temporary networks, where a capital covering is not required, for example, to drain rainwater from crushed stone sites.

Placing a water-permeable geotextile around the perforated sleeve for the entire thickness of the covering of a square with a bend under an anti-filtration screen prevents sand erosion into the stormwater well and increases the purity of rainwater and melt water entering it and, thereby, increases the efficiency of the stormwater well.

The device around the perforated shell of the square, which is a crushed stone coating, placed on a layer of compacted sand, laid on top of an impervious screen made of bentonite mats, allows liquid (rain and melt water) to be absorbed and then penetrate into the stormwater well from all sides of the perforated shell. Thus, the volume of the incoming water increases, since there is additional space for the penetration and distribution of the volumes of the incoming liquid and its subsequent entry into the stormwater well, which also makes it possible to increase the efficiency of the stormwater well.

Thus, the claimed combination of features of the invention allows to increase the efficiency of the stormwater well by filtering rain and melt water entering the stormwater well in relation to a fraction with a diameter larger than the diameter of the road surface materials - stones, crushed stone, construction waste and other rubbish, as well as eliminating erosion of sand into the rainwater well, increasing the volume of rain and melt water entering the stormwater well. In addition, it does not require the adjoining of the road surface to the hatch of the stormwater well, as a result of which it can also be used at the sites of temporary networks for drainage of wastewater, for example, crushed stone sites.

FIG. 1 shows a general view of the device of the stormwater well, FIG. 2 - section A.

The stormwater well contains a working chamber 1, which is a reinforced concrete structure 2, consisting of a bottom 3 and walls 4.

The surfaces of the walls 4 are covered with layers of a bitumen primer and waterproofing material (shown in dotted lines in the figure).

On top of the reinforced concrete structure 2, there is a removable reinforced concrete floor slab 5, which is covered with layers of a profiled membrane (not shown in the figure), which overlaps the joints of the floor slab with the walls of the stormwater well, bitumen primer (not shown in the figure) and waterproofing material (shown in dotted lines in the figure) ...

A hatch 6 is installed on the floor slab 5, on top of which a perforated sleeve 7 is placed, consisting of a protective screen 8 and a perforated removable cover 9 with an anti-corrosion coating. Perforation consists of holes with a pitch of 100 mm and a diameter of 15 mm. If necessary, depending on the design solutions, the perforation diameter can be changed.

The design of the perforated sleeve 7 does not prevent the removal of the hatch cover 6 and the operation of the stormwater well.

The stormwater well is installed in square 10 with a slope towards the stormwater well. Caret 10 represents sequentially placed layers:

- layer 11 of crushed stone,

- layer 12 of compacted sand;

- an anti-seepage screen 13 made of bentonite mats.

The perforated sleeve 7 is installed on the same level with the bob 10. Around the perforated sleeve 7 for the entire thickness of the road surface of the bob 10 with a bend under the anti-filtration screen 13, a water-permeable geotextile 14 is laid (see Fig. 2).

The bottom 3 of the stormwater well is placed on a compacted base 15, which is sequentially placed layers:

- 2 layers of waterproofing material;

- bituminous primer;

- concrete preparation;

- crushed stone preparation from the crushed stone layer.

In the side wall of the bottom 3 of the stormwater well, a storm pipe 16 is installed through the stuffing box 17 with the stuffing box stuffing with a sealing material (shown by shading in the figure).

The floor of the stormwater well is made with a slope towards the storm pipeline 16.

A stepladder 18 is attached to one of the walls 4 of the stormwater well with stainless steel spacer studs.

The method of installing a stormwater well is as follows:

for the installation of the planned stormwater well, a pit is made, along the bottom of which a compacted base 15 is prepared, which is a layer of crushed stone with a fraction of 20-40 mm with a thickness of at least 300 mm, on top of which concrete preparation is performed with a thickness of at least 100 mm and dimensions, at least 100 mm larger than the dimensions of the bottom 3 of the stormwater well in all directions. On top of the concrete preparation, a gluing waterproofing is arranged from two layers of waterproofing material with a primer from a bitumen primer, after which the bottom 3 and walls 4 of the stormwater well are mounted.

Next, a stormwater pipeline 16 is installed, a removable reinforced concrete slab 5 of the stormwater well is mounted over a layer of cement-sand mortar with a thickness of at least 10 mm, and a stepladder 18 is mounted for servicing the stormwater well and a hatch 6, made in accordance with GOST 3634-2019.

A metal perforated sleeve 7 is arranged on top of the hatch 6 and waterproofing of the inner and outer surfaces of walls 4 and floor slab 5 is performed.

After that, backfilling of the excavation with layer-by-layer compaction is performed. On top of the compacted soil around the perforated sleeve 7, a square 10 is placed, which is a layer 11 of crushed stone with a fraction of 20-40 mm and a thickness of 200 mm, placed on a layer 12 of compacted sand with a thickness of 100 mm, laid on top of an anti-filtration screen 13 of bentonite mats.

For the entire thickness of the covering of the square 10 around the perforated sleeve 7 with a bend under the anti-filtration screen 13, a water-permeable geotextile 14 is laid.

The device works as follows.

Melted or surface water, or storm water during rain through the side surface of the protective screen 8 of the perforated sleeve 7, as well as through the holes in the cover 9 of the perforated sleeve 7, enter the stormwater well and then into the stormwater pipeline. Thus, thanks to the perforated sleeve, water does not erode the structure of the square of the square, consisting of crushed stone and sand, and thereby prolongs the service life of the site and does not clog the stormwater well.

Claims (6)

1. A stormwater well, installed in a square on a compacted base, containing a working chamber and a floor slab, on top of which a hatch is installed, characterized in that a perforated sleeve is installed on the stormwater hatch at the same level with the square, consisting of a protective screen and a perforated removable cover, moreover, the perforation represents holes with a diameter smaller than the fraction of the material of the covering of the square, and a water-permeable geotextile is placed around the perforated sleeve for the entire thickness of the covering of the square. 2. Storm well according to claim 1, characterized in that the square is a crushed stone covering placed on a layer of compacted sand, laid on top of an anti-seepage screen made of bentonite mats. 3. Storm well according to claim 1, characterized in that the compacted base is a layer of crushed stone, on top of which concrete preparation is made with waterproofing of two layers with a bitumen primer primer. 4. A method of installing a stormwater well, including a foundation pit for installing a planned stormwater well, preparing a compacted base for a stormwater well, installing a stormwater well on a prepared base, connecting a stormwater pipeline to a stormwater well, installing a reinforced concrete floor slab, backfilling the foundation pit and installing a hatch, which is different the fact that a metal perforated sleeve is installed on top of the hatch, waterproofing of the inner and outer surfaces of the walls of the stormwater well and the reinforced concrete floor slab is performed, after which the excavation is backfilled with layer-by-layer soil compaction, while over the compacted soil around the perforated sleeve, a square is organized, which is a layer of crushed stone fractions of 20-40 mm and a thickness of at least 200 mm, placed on a layer of compacted sand with a thickness of at least 100 mm, laid on top of an impervious screen made of bentonite mats, and and the entire thickness of the covering of the square around the perforated sleeve with a bend under the anti-filtration screen is carried out by laying a water-permeable geotextile. 5. A method of installing a stormwater well according to claim 4, characterized in that the compacted base is a layer of crushed stone with a fraction of 20-40 mm with a thickness of at least 300 mm, on top of which concrete preparation is performed with a thickness of at least 100 mm and dimensions of at least 100 mm larger than the bottom of the stormwater well in all directions. 6. A method of installing a stormwater well according to claim 5, characterized in that a glued waterproofing made of two layers of waterproofing material with a bitumen primer primer is arranged on top of the concrete preparation before installing the bottom and walls of the stormwater well.

Images