EP3460133A1 - Seepage system - Google Patents

Abstract

The invention relates to an infiltration system (1), preferably for a trench to be laid underground, with one or more hollow bodies (5) which are intended to keep a volume (2) free in the earth into which a fluid to be seeped, preferably rainwater, for caching and infiltration can be introduced, with a channel (7) or one or more Spülhohlkörpern (6), which form a channel (7), and with a settling device (3) for settling suspended solids contained in the fluid. To improve the cleaning performance, a fluid-permeable settling device (3) and flushable settling chambers (8) are provided. In this way, an integrated infiltration or storage device is improved in that the dirt load is kept safer from the actual cavity and is easier to remove.

Description

The invention relates to an infiltration system, preferably for a trench to be laid underground, with one or more hollow bodies which are intended to keep a volume in the ground into which a fluid to be seeped, preferably rainwater, for intermediate storage and infiltration can be introduced Channel or one or more Spülgohlkörpern forming a channel, and with a settling device for settling suspended solids contained in the fluid. The invention can also be applied in a storage system, then the volume is not lined with permeable material, but with dense film.

For caching and infiltration of rainwater in practice often used triggers that contain distribution pipes and either with gravel or with infiltration devices (contact erosion-protected hollow bodies) are filled. Modern storage and infiltration systems today often contain modular plastic hollow bodies, which together form the static support of the container (corset) and, depending on the application with nonwovens (percolation) or films (storage system) are sheathed. Due to the design of these hollow bodies contain a variety of different struts that serve to absorb power or force. They are often designed as stackable or stackable boxes which together form the supply channels and the required cavity for the water. They are usually so stable that the surface above can be used as a lane or parking lot.

Rainwater drains, depending on the type of surface connected, are heavily contaminated with the most diverse pollution loads (suspended matter). These particulates settle within the container due to the lower flow rate and can clog and / or fill up the container thereby rendering the container unusable. There are a variety of different rainwater purification or rainwater treatment systems on the market. These are almost always used in advance of the storage or infiltration system.

The partially filtered or unfiltered rainwater drains pass through a connecting line (pipe socket or internal shaft) into the actual container. There, the incoming rainwater can distribute one, two or three dimensions almost freely in the container. However, this also applies to the registered pollution load.

In rainwater storage and infiltration systems, it is therefore essential to be able to free the system of the introduced pollution loads from time to time. Especially infiltration plants tend to smolder by the areal application of the pollutants. Cleaning the Kolmatierten surfaces is almost impossible. As a result, the function of letting water seep through the contact surfaces of the soil is no longer possible. The sometimes proposed driving through with high pressure washers often causes only a shift of pollution loads, but does not allow the targeted removal of dirt loads.

From the DE 10 2005 006 202 A1 An integrated infiltration device is known, in which a sedimentation device for settling the suspended matter is provided in a channel. The settling device consists of a fluid-impermeable trough or gutter on the bottom of the channel and openings (holes, slots) on the sides. This causes suspended matter to settle to the bottom and later be removed by rinsing. The disadvantage here is that existing pollution load is kept constantly by inflowing rainwater in motion, crushed due to constant friction processes and then finally - but for example in heavy rain - is introduced through the openings in the actual trench. This leads to colmation of the nonwovens at the transition of the storage elements to the upcoming soil, whereby the function of infiltration of rainwater is limited. This device forms the preamble of claim 1.

The object of the invention is to improve such an integrated infiltration or storage device to the effect that the contaminant load is kept safer from the actual cavity and is easier to remove.

The object is achieved by the subject matter of claim 1. Preferred embodiments of the invention are subject matters of the subclaims.

According to the invention, therefore, a percolation system is provided, preferably for a trench to be laid underground, with one or more hollow bodies which are intended to keep a volume in the ground free, into which a fluid to be infiltrated, preferably rainwater, for intermediate storage and infiltration can be introduced a channel or one or more rinsing hollow bodies, which form a channel, and with a settling device for depositing suspended matter contained in the fluid, characterized in that the settling device is at least partially fluid-permeable and that flushable settling spaces are provided.

Essential to the invention is therefore that no channel must be provided in which the deposits are constantly washed around, but that Absetzräume are provided which allow stabilization of the contaminant load or sediment. The riverbed and the upstanding walls of the sewer are equipped with a variety of mud or sedimentation chambers that sustainably stabilize the deposited contaminant loads before they can be selectively removed during a maintenance operation. A further shift of the sediments towards actual cavity - or outer fleece - does not take place. Thus, the stored particles are not exposed to any further friction or crushing processes. Under certain circumstances, these could mean that the shredded particles could eventually overcome the inner membrane (the fleece). This in turn could then cause colmation processes on the fleece outer shell of the system.

According to the invention, therefore, a fluid-permeable film, a cloth, a woven fabric, a membrane or a fleece is used, which extends over long distances within the volume and which preferably runs below and next to a channel. The fluid permeability does not have to be everywhere; it can be enough if it exists at least in sections. The channel may be integrally formed as a kind of tube or of several parts. Preferably, the channel is composed of a plurality of Spülhohlkörpern, which are aligned uniformly so that they together form the channel which extends over a longer distance in the volume. This channel can then be used to inspect or rinse and remove the deposits. The film may be composed of individual pieces or of larger areas.

Especially when using hollow bodies, it is sufficient if the flushing hollow body are covered at the bottom and on two vertical sides with foil / membrane. This may preferably be prefabricated or already carried out during installation, so that the rinsing hollow bodies forming the settling device are simply encased with foil / membrane. The individual film sections do not necessarily have to be sealingly connected to one another, since the film pieces are held in place by the adjacent hollow bodies. The pieces of film thus form a channel which is permeable to the fluid, that is, as a rule, rainwater. However, for the entrained solids, sediments, debris or dirt, the films are impermeable and act like a filter that retains the solids.

The solids can therefore not penetrate into the actual volume, but remain held in the channel. This shows the great advantage of the invention: Since in addition to the film / membrane also settling spaces are provided - in the flow direction within the channel - the solids are deposited and sediment. These spaces arise, for example, when using per se known trench fillers systems such as the ENREGIS / X-Box and the ENREGIS / Controlbox inspection channel offered by the Applicant. Are the channel elements simply at the two vertical Walls and bottom covered with foil / fleece (U-shape), remain between the channel opening and the bottom of the elements and on the sides of the elements thanks to the many struts settling spaces, where due to lower flow velocity, the particles settle and sediment.

Ideally, the flushing hollow bodies, which form the channel and which are sheathed, are connected directly or indirectly to the connection of the supply line. This can also be done via an internal shaft or a pipe section in the interior of the container. It can be provided one channel or more channels, which then run perpendicular to each other or parallel to each other. However, it should always be ensured that all channels are easily accessible from above for rinsing. The length of the channels is freely selectable. If they do not end at the end of the volume at the soil fleece, it must be ensured that also at the end of the channel a (solid or liquid-permeable) barrier is provided for the still polluted rain water.

In a preferred embodiment of the invention, not only a single strand hollow body with foil / membrane is encased, but also over the strand vertically above the hollow body arranged. Then also their sides form a sort of higher filter space, so that with stronger rain inflow significantly more water can be filtered than in the "flatter" variant.

Also, the film / membrane can be arranged only over partial areas (horizontal / vertical). This can differ project-specifically and usually has the task to summarize hydraulic Spitzenabflußsituationen.

The inlet channels can also be equipped in conjunction with other flow and sedimentation-optimized installation elements. They can, for example, flow separators, Baffles, immersion or mud walls. These internals serve for hydraulic and qualitative optimization in the channels.

In a further embodiment of the invention, instead of a nonwoven covering the channel, a grid-like element is used which is located within a channel. This grid runs along the channel and divides it into an upper flow space and a lower settling space. Entrained suspended particles fall through the grid and collect below. This collecting effect is improved by arranging structures on the sole of the channel that create obstacles and inhibit the flow velocity. These can be grooves, elevations, depressions or similar roughness between which the solids can settle. These special features of the outsole can form a kind of mud chambers, which are rinsed later.

Further advantages, features or applications will become apparent from the following description of the figures, wherein all features shown and mentioned are considered to be essential to the invention or in any combination as essential to the invention.

Fig. 1

ein Versickerungssystem aus dem Stand der Technik

Fig. 2

ein Versickerungssystem gemäß einem bevorzugten Ausführungsbeispiel der Erfindung,

Fig. 3

eine Detailansicht des Systems der Fig.2,

Fig. 4

eine weiteres Versickerungssystems gemäß einem bevorzugten Ausführungsbeispiel der Erfindung und

Fig. 5

eine alternative Ausführung eines Kanals eines Versickerungssystems gemäß einem bevorzugten Ausführungsbeispiel der Erfindung.

Show it:

Fig. 1

a percolation system of the prior art

Fig. 2

a percolation system according to a preferred embodiment of the invention,

Fig. 3

a detailed view of the system of Fig.2 .

Fig. 4

another infiltration system according to a preferred embodiment of the invention and

Fig. 5

an alternative embodiment of a channel of a seepage system according to a preferred embodiment of the invention.

Fig. 1 schematically shows a percolation system 1 according to the prior art ( Fig. 2 the DE10 2005 006 202 A1 ), in which rainwater is introduced from a house roof after a cleaning stage for seeping into the cavity 2. In the volume / cavity 2 is a settling device 3, which here consists of an upwardly open, but in the flow direction rear closed, groove of fluidundurchlässigem material having an opening row 4a and above a second row of openings 4b at a certain height. Rainwater remains in the gutter and flows off only through the rows of openings 4a and 4b. This ensures that dirt settles on the sole of the channel and does not flow into the actual volume 2.

Fig. 2 shows below in outline an inventive infiltration system 1 Fig. 2 above the section AA is shown. It can be seen that the volume 2 was created underground and is now filled with hollow bodies 5. These can be, for example, ENREGIS / X boxes, which are so stable that they keep the volume 2 clear and allow rainwater to flow through. The boxes are to the bottom, on the outsides and top - so where the volume comes into contact with the soil - coated with water-permeable fleece, which slowly lets the water seep away. In the middle of the infiltration system 1 is a series of Spülhohlkörpern 6, which have the same dimensions as the hollow body 5, but a through opening, which together with the other Spülgohlkörpern 6 of the same series the channel 7, which here by the whole Cavity 2 extends and which can be used for inspection and rinsing.

The access to the channel 7 via the telescopic cover 10. Exemplary dimensions are the FIGS. 2 to 4 refer to. According to the invention is now as Absetzzeinrichtung 3 a fluid-permeable fleece provided, which is below the Spülhohlkörper 6 and the side of the Spülhohlkörper 6. It surrounds, so to speak, the channel 7 formed by the series of flushing hollow bodies 6 in a U-shape. Introduced rainwater passes through the channel 7 and can - as the nonwoven is fluid-permeable - flow into all below and adjacent hollow body 5 and fill them. However, since the fleece retains solids, suspended solids, dirt and abrasion reliably remain within the fleece 3, settling there on the sole and in the lower region. Since the fleece is arranged outside the structural elements of the flushing hollow body 6, the solids accumulate in the undercuts, in holes and in struts of the flushing hollow bodies 6, that is to say in the settling spaces, which in FIG Fig. 3 can be seen better, and can sediment there. These solids can be removed by regular flushing of the channel 7 again.

Fig. 3 shows above the section BB of the infiltration system 1 of Fig. 2 and below an enlarged detail. There, the separation device 3, so the fleece, as "U" exaggerated thick. It comprises the channel 7, which is formed by the series of Spülhohlkörper 6. Within the fleece 3 are the settling spaces 8. Within the channel 7 are possible inlets 9 of sizes DN 110, DN 160, DN 200 and DN 315 to see.

Fig. 4 shows a further embodiment of an infiltration system 1 according to the invention, in which not only the Spülhohlkörper 6, which form a channel, but also the hollow body 5, which are located in a row above the channel, and the hollow body 5, which is still a row above are surrounded by the acting as a filter fleece. The nonwoven fabric has as Absetzzeinrichtung 3 again U-shape, but has significantly longer legs. In the case shown, the fleece extends over two, even here three layers of hollow bodies 5 and 6 to the upper edge of the volume 2 and abuts directly on the telescopic cover 10. To recognize are again the channels 7 and in the detail magnification acting as Absetzzeinrichtung 3 Fleece - strongly drawn in U-shape - and the settling 8.

Fig. 5 finally shows a detail of yet another variant of a percolation system in which no fluid-permeable fleece, but a fluid-permeable grid 11 is provided in an inlet channel 7. Here, the separation of suspended particles and liquid takes place in that the liquid flows through the channel 7 (essentially a tube) and thereby suspended particles or dirt particles fall down through the grid 11 and on the sole of the channel 7 at or between extra applied structures settle down and get stuck. The grille 11 is preferably arranged in the lower region of the channel 7 and extends substantially over the entire length of the channel 7. The channel 7 may, as previously described, be assembled from a plurality of rinsing hollow bodies. But it can also be incorporated in one piece or in prefabricated lengths in the volume. It can be arranged before the actual Rigole, but also in it.

LIST OF REFERENCE NUMBERS

1

Drainage system

2

Volume / cavity

3

settler

4a

opening series

4b

opening series

5

hollow body

6

Spülhohlkörper

7

channel

8th

settling

9

Intake

10

telescopic cover

11

grid

12

structures

Claims (9)

Infiltration system (1), preferably for a trench to be laid underground, with one or more hollow bodies (5) designed to keep a volume (2) free in the earth, into which a fluid to be seeped, preferably rainwater, for intermediate storage and infiltration is introduced, with a channel (7) or one or more Spülhohlkörpern (6), which form a channel (7), and with a settling device (3) for settling suspended solids contained in the fluid, characterized in that the settling device (3) at least partially fluid-permeable and that flushable Absetzräume (8) are provided. Infiltration system (1) according to claim 1, characterized in that the settling device (3) is a membrane, a cloth, a fabric, a fabric or a non-woven, preferably of geotextile or of metal. Infiltration system (1) according to one of the preceding claims, characterized in that the settling device (3) is arranged below and / or laterally of the flushing hollow body (6). Leaching system (1) according to any one of the preceding claims, characterized in that the settling device (3) also sheathed higher-lying hollow body (5). Insurance system according to one of the preceding claims, characterized in that the Spülhohlkörper (6) have structural elements which act as Absetzräume (8). Infiltration system according to claim 5, characterized in that the settling spaces (8) of undercuts, holes and / or struts of the flushing hollow body (6) are formed. Insurance system according to one of the preceding claims, characterized in that the settling device (3) is applied to the rinsing hollow body (6) from the outside. Infiltration system (1) according to claim 1, characterized in that the settling device (3) is a grid (11) which is located within a channel (7) and separates the channel (7) into an upper flow space and a lower settling space. Infiltration system (1) according to claim 8, characterized in that flow-inhibiting structures (12) are provided in the lower settling space or in the sole.

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