EP1528168A2 - Gutter for intermediate storage of fluid, in particular rain water - Google Patents

Abstract

A rainwater guiding layer (26) is provided on the outer side of a filter layer (24) and extends between a lateral side (10d) of the gutter (10) and the gutter base (10c). The filter layer comprises a nonwoven material. The rainwater guiding layer is a flexible one or a rigid plate. The gutter is at least partially lined with a filter layer.

Description

The invention relates to a rig for caching liquid, especially rainwater, the surface of the trench volume at least partially covered by a filter layer and at least one primary infiltration area and at least one secondary infiltration area includes.

Such rigs are mainly used as infiltration systems for Rainwater used and gain in municipal drainage planning increasingly important. The trenches must be permanently the Ensure drainage. Especially if the trench is under one sealed area, such as a street or a parking lot, arranged, a decades-long functioning must be guaranteed be, because renovations in these areas are particularly costly and are costly.

A generic trench is for example from DE 101 23 754 A1 known.

Under a primary infiltration surface is associated with the present invention, a surface area of the surface of the trench volume understood by the newly installed rig of the Most of the rainwater seeped by gravity. At a cuboidal trench this is the substantially horizontally extending, plane floor surface of the trench. In addition, a part of the rainwater occurs but also on the side surfaces of the trench. These side surfaces form therefore secondary infiltration areas in the sense of the present application. Usually, as the total infiltration active area cuboidal rigole the area of the floor area plus a quarter of the surface area of the lateral surfaces of the trench.

The invention also relates to trenches with non-cuboid shape. These can also be primary and secondary infiltration surfaces differ. Under a primary infiltration surface is general understood a leaching area through which the rain water following gravity downwards while passing through a secondary infiltration surface is pushed laterally.

The filter layer mainly has the function of penetrating from the soil that has been flushed out into the trench prevent. However, these debris are not a problem as they at the next rain from that collected in the trench and from this emerging rainwater are again detached from the filter layer.

On the other hand, problems with the rainwater are problematic be initiated into the trench. Rainwater from fortified Runs off surfaces and is collected in the trench for infiltration leads namely pollution with you. These pollution loads not only pollute the groundwater but also affect the groundwater Operability of the trench. And these pollution loads sediment, i.e. they settle at the bottom of the trench and clog and after the primary infiltration areas, more specifically those Primary infiltration surfaces associated surface portions of the filter layer. Upstream cleaning equipment, such as mud buckets or settling tanks, certain fractions of the pollutant load withhold or separate. The rainwater can so up to a be cleaned to a certain degree. Very often, however, these pre-treatment plants not effective enough or they will not be needed Dimensions are maintained. Therefore, in particular fine dirt load shares easily get into the trench. Just these fine dirt freight shares are but especially critical because they can clog the pores of the filter layer. The process of sedimentation, especially of sedimentation fine pollution load shares, can by today's knowledge by Pre-treatment plants only moderated, but never completely switched off become. Therefore, above all, the reliability and longevity endangered by conventional trenching as they gradually increase their infiltration performance, for which they have been designed, lose and Renovation must be expanded, which entails high costs.

In contrast, it is an object of the invention to provide a trench of the generic Specify type, in which even with decreasing infiltration contribution the primary infiltration areas due to sedimentation or the like still a high degree of functionality can be ensured.

This object is achieved by a trench of the beginning mentioned type in which at least a part of the Rigolenvolumen facing away from the filter layer a liquid-conducting Layer is provided, which is at least one Section of a secondary infiltration surface up to at least one Section of a primary infiltration surface extends. It was already on this point emphasizes that under a liquid - conducting layer in the In connection with the present invention in general a layer is understood, whose liquid conductivity is greater than the liquid conductivity of the soil surrounding the trench. The liquid-conducting Layer thus forms a kind of "bypass", which by the secondary seepage fluid leaking in the series the effect of gravity particularly seeping active area of the primary infiltration surfaces conducts, outside of Sedimentation clogged filter layer. By the associated rapid discharge of the liquid from the area on the outside of the secondary infiltration surfaces can through these secondary infiltration surfaces significantly more liquid escape from the trench than at conventional triggers. If the trench is substantially complete, i. at least in the area of their primary and secondary infiltration areas on its outside with such a liquid-conducting layer provided, so is even if the filter layer in the primary infiltration surfaces as a result of sedimentation practical is completely clogged and can no longer afford any infiltration this primary infiltration surface due to the bypass effect of liquid-conducting layer, however, substantially completely as infiltration area available.

In practice, it will not be entirely possible to prevent part of the fine dirt particles with the through the secondary infiltration surfaces passing liquid to the sections arranged there the filter layer passes and settles on this. With every movement of the but in the trench volume recorded liquid is at least the possibility that these fine dirt cargo shares again of the secondary drainage areas are washed off and to which the Primary infiltration surface covered by sediment sink: At inspectable trenches, such as those of the generic type DE 101 23 754 A1 are known, there is also the possibility that secondary infiltration surfaces with conventional sewer flushing technology, For example, a high pressure washer, clean to its permeability if necessary, to restore. The rinsed off Dirt fractions can in turn sink to the sediment layer. The Add secondary seepage areas with fine contaminated cargo fractions Therefore, in practice, it does not pose a problem that requires a refurbishment and a related expansion of the entire rigging required would.

To be able to prevent that the liquid-conducting layer their Liquid conductivity gradually as a result of from the soil loses washed out substances, is in development of the invention suggested that at least part of the volume of the trench opposite side of the liquid-conducting layer another filter layer is provided. In this case, the filter layer and / or these further filter layer may be formed by a nonwoven layer.

To the inventive rig without increased installation costs in Comparison with conventional rigs, it is proposed that the filter layer, the liquid-conducting layer and possibly the further filter layer joined together to form a prefabricated drainage unit are.

When the liquid-conducting layer is formed flexible, for example from a tangle of plastic threads or a plurality of superimposed layers of different Main directions oriented plastic threads or the like is formed, Thus, this drainage unit takes the overall shape of a flexible Mat on, in a simple way around the corners and edges of the trench can be put around. Especially when using cuboid Rigulas is the flexibility of the fluid-conducting layer and that with it formed drainage unit of great importance to the liquid from the Range of secondary seepage areas, i. the side surfaces, in Essentially trouble-free in the field of primary Infiltration areas, i. the ground surface to be able to conduct.

Alternatively, however, it is also possible to use the drainage unit as a total in the To form essentially rigid plate. For this purpose, the liquid-conducting Layer, for example, of one, preferably made of plastic, Be formed grid structure. Further, it is possible to use plates which from loose poured and glued together at the contact points Balls, for example made of polystyrene, are made. With these plates The fluid can exist through between the balls Between spaces flow. Furthermore, plates, for example Polystyrene, used in the liquid-conducting channels at the Manufacture molded or introduced later.

In principle, however, it is also possible to use mineral drainage layers use, for example, embedded between two filter layers Gravel layer.

It has already been pointed out above that the invention not provided on the outside of the trench liquid-conducting layer can only be used with advantage in cuboid shaped trenches, but that the the same benefits readily achieved even with differently shaped rigs can be. The same applies to the internal structure of the trench, i. the way the trench volume is stabilized. For example are known trenches in which the trench volume of a simple Gravel pile is formed. With particular advantage, the invention However, be used in trenches, consisting of a plurality of Rigolenelementen is composed, for example, Rigolenelementen, as disclosed in the application DE 101 23 754 A1.

In a further development of the invention it is proposed that the trench volume a plurality of Rigolenteilvolumina comprises, whose surface at least partially adjacent to each other. This can reduce the size of the Area of secondary infiltration areas with the same volume of trench be enlarged. This has a positive effect in particular the infiltration performance of the trench when the primary infiltration surfaces this rigging in consequence of sedimentation in essence are completely blocked.

When in the area of adjacent surfaces of two Rigolenteilvolumina the liquid-conducting part associated with the one part of the rectilinear volume Layer and the other Rigolenteilvolumen associated liquid-conducting Layer formed from one and the same liquid-conducting layer so may the above-mentioned increase in percolation performance without a concomitant proportional increase in material and Assembly costs are achieved, since in this case at least a part of liquid-conducting layer simultaneously of several Rigolenteilvolumina is being used. Since the infiltration performance essentially by the Absorbance of the arranged under the primary infiltration surface Soil is limited, and the flow resistance of the liquid-conducting Layer is lower in any case than that of the soil, represents the sharing one and the same liquid-conducting layer two rig part volumes in practice no the percolation performance of the Rigole limiting factor.

In a further development of the above-explained idea of the common Use of one and the same liquid-conducting layer by means of two partial volumes of the rectilinear part it is suggested that in the area adjacent to each other Surfaces of two Rigolenteilvolumina the filter layer of a prefabricated Dräneinheit as the filter layer of a Rigolenteilvolumens and the another filter layer of the prefabricated drainage unit as the filter layer of serves other rig part volume. In this case it is of special Advantage, if the filter layer and the further filter layer of the prefabricated Dräneinheit are identical.

Not only for the above-explained case of the arrangement of a prefabricated drainage unit between two Rigolenteilvolumina, but also in the event that a first prefabricated drainage unit on a side surface the trench and a second prefabricated drainage unit on a floor surface the trench is arranged and these two drainage units to form the Bypasses must be connected to each other, it is proposed that a first prefabricated drainage unit with its front side on a Surface area of a second prefabricated drainage unit is placed, of which the filter layer and / or the further filter layer at least partially removed. In this way, the fluid-conducting go Layers of the two prefabricated drainage units directly into each other over, no additional flow resistance through the transition is produced.

Since the liquid conducted in the liquid-conducting layer due to the previous passage through the filter layer virtually no dirt more with it, it is also conceivable in principle, the first prefabricated Dräneinheit with its front side directly on the filter layer of the second prefabricated drainage unit without putting in this Aufsetzbereich clogging of the filter layer of the second prefabricated drainage unit would be afraid. However, the flow resistance increases in this case in the transition or Aufsetzbereich.

Is the trench composed of a plurality of trench elements, as they are known from DE 101 23 754 A1, so each of these Trench elements form a separate Rigolenteilvolumen and at least in the area of its bottom surface as well as its side surfaces with a Be provided filter layer and a liquid-conducting layer. It is Finally, it is also possible with the filter layer and the liquid-conducting Layer provided trench element as a prefabricated unit provide.

Nachzutragen is still that as a prefabricated drainage unit, for example a so-called Geomatte can be used.

Fig. 1

eine schematische Schnittansicht einer ersten Ausführungsform einer erfindungsgemäßen Rigole;

Fig. 2

eine vergrößerte Teilansicht der Rigole gemäß Fig. 1;

Fig. 3

eine Ansicht ähnlich Fig. 1 einer zweiten Ausführungsform einer erfindungsgemäßen Rigole; und

Fig. 4

eine vergrößerte Teilansicht der Rigole gemäß Fig. 3.

The invention will be explained in more detail below with reference to the accompanying drawings. It shows:

Fig. 1

a schematic sectional view of a first embodiment of a trench according to the invention;

Fig. 2

an enlarged partial view of the trench of FIG. 1;

Fig. 3

a view similar to Figure 1 of a second embodiment of a trench according to the invention. and

Fig. 4

an enlarged partial view of the trench according to FIG. 3rd

In Fig. 1, a trench according to the invention is generally designated 10. she is composed of a plurality of Rigolenfüllkörpern 12, in the Soil 14 below a sealed surface 16, for example a Street, a parking lot or the like, are arranged. That on the Surface 16 descending rainwater 32 is collected at Gullies 18, in Vorreinigungseinrichtungen 20, for example, a sludge bucket, prepurified and then via a feed line 22 into the trench 10th initiated.

As can be seen in particular in Fig. 2, the trench is at its outer Surface 10a covered with a filter layer 24, for example, from Fleece can be formed. Further, at the volume 10 b of the trench 10th opposite side of the filter layer 24, a liquid-conducting layer 26th provided, the surface facing away from the filter layer 24 advantageously is covered by another filter layer 28. The filter layer 24, the liquid-conducting layer 26 and the further filter layer 28 may be assembled into a prefabricated drainage unit 30.

The trench 10 is in the embodiment shown in the figures a rectangular rig, whose surface 10a has a bottom surface 10c and Side surfaces 10d includes. The bottom surface 10c forms a case in this case Primary infiltration surface of the trench 10, as that through from the trench Emerging rainwater 32 following gravity immediately in the soil 14th can infiltrate. The side surfaces 10d, however, form secondary infiltration surfaces, since the water 32 passing through them still remains along the side surface 10d of the trench 10 must run down before it can seep into the soil 14.

Since in practice can not be prevented that the rainwater 32 certain dirt cargo shares with it, resulting in the trench 10 then settle at the bottom and there form a sediment layer 34, the primary infiltration surface 10c of the trench 10, more specifically this one primary infiltration surface associated part of the filter layer, through This dirt cargo shares clogged and gradually loses their Infiltration capacity. This is in Fig. 2 for the extreme case of the complete Loss of infiltration capability of primary infiltration surface 10c represented by that through this primary infiltration surface 10c passing flow arrow 35 is crossed.

Unlike the primary infiltration surfaces 10c retain the secondary infiltration surfaces 10d their permeability, as attached to them due to their essentially vertical orientation #lower sediment can attach. Therefore, the rainwater 32 through the secondary Leakage surfaces 10 c and the filter layer 24 pass through and enters the liquid-conducting layer 26. This is shown in Fig. 2 by the Flow arrows indicated 36a. The liquid-conducting layer 26 acts as a bypass for the primary infiltration area blocked by the sediment 34 10c and directs the rainwater 32 on the outside of the filter layer 24 in the area of the primary infiltration surface 10c. This is in Fig. 2 indicated by the flow arrow 36b. in this context it is important that the liquid-conducting layer in the illustrated Example uninterrupted from the secondary seepage surface 10d passes to the primary infiltration surface 10c. To this Way, the rainwater 32 despite the sediment layer 34 in the Area of the infiltration surface 10 c arrive and there by the other Filter layer 28 seep into the soil 14. This is in Fig. 2 by the Flow arrows 36c indicated.

According to the above, the trench 10 according to the invention also retains 10 when the primary infiltration surface 10c has its liquid permeability or infiltration capability due to the sediment layer 34 completely has lost at least a large part of its initial infiltration in that the rainwater 32 over the secondary infiltration surfaces 10 d and the liquid-conducting layer 26, which bypasses as the sediment layer 34 acts in the region of the primary infiltration surface 10c passes, due to the influence of gravity especially seepage is effective.

In Figs. 3 and 4 is another embodiment of an inventive Rigole represented essentially the embodiment corresponds to FIG. 1 and 2. Therefore, in Figs. 3 and 4 are analogous part provided with the same reference numerals as in Figs. 1 and 2, however increased by the number 100. Furthermore, the embodiment of FIG. 3 and 4 are described below insofar as they differ from the Embodiment according to FIGS. 1 and 2 differs to the description thereof otherwise expressly referred to.

The trench 110 according to FIGS. 3 and 4 differs from the trench 10 1 and 2 only in that the trench volume 110b in a plurality of stock part volumes 110b1, 110b2, 110b3 is divided. The trench sub-volumes 110b1, 110b2, 110b3 adjoin one another however, at least partially at the adjoining surfaces separated by a prefabricated drainage unit 130 '. Thus form not only the side surfaces 110d of the outer surface 110a of FIG Rigole 110, but also the adjacent parts of the Surfaces 110d 'of the trench subvolumes 110b1, 110b2, 110b3 secondary Infiltration surfaces of the trench 110.

As shown in FIG. 4, the liquid-conducting layer 126 'is each two of the Rigolenteilvolumina 110b1, 110b2 assigned. Further forms the filter layer 124 'of the prefabricated drainage unit 130' the filter layer one part of the tube part 110b1, while the other filter layer 128 ' the prefabricated drainage unit 130 'the filter layer of the other Trigol part volume 110b2 forms.

As further shown in Fig. 4, the transition of the prefabricated Drainage unit 130 ', between two adjacent Rigolenteilvolumina 110b1, 110b2, to the prefabricated drainage unit 130, which is the bottom surface of the trench 110, i. the primary infiltration area 110c of this rig 110 is arranged adjacent realized thereby be that a strip of the filter layer 124 of the drainage unit 130th whose width is substantially equal to the thickness d of the drainage unit 130 ' corresponds, and this drainage unit 130 'on impact on the drainage unit 130th get up. If desired, the connection of the two drainage units 130, 130 'by fastening means, for example brackets, Bonding and the like, to be secured. In this way creates a substantially flow resistance free transition from the liquid-conducting layer 126 'of the drainage unit 130' to the liquid-conducting Layer 126 of the drainage unit 130.

The infiltration path of the rainwater 132 from the Rigolenteilvolumina 110b1 and 110b2 out through the filter layers 124 'and 128' into the liquid-conducting layer 126 'of the drainage unit 130' into, further along this via the liquid-conducting layer 126 of the drainage unit 130 in the Area of primary seepage area blocked by sediment layer 134 110c and finally through the further filter layer 128 of Drainage unit 130 into the soil 114 is shown in Fig. 4 by the arrows 136a, 136b and 136c.

Claims (11)

Rigole (10; 110) for temporarily storing liquid (32), in particular rainwater, wherein the surface (10a; 110a) of the trench volume (10b; 110b) is at least partially covered by a filter layer (24; 124) and at least one primary infiltration surface (10). 10c, 110c) and at least one secondary infiltration surface (10d, 110d),
characterized in that at least part of the side of the filter layer (24; 124) remote from the trench volume (10b; 110b) is provided with a liquid-conducting layer (26; 126) extending from at least a portion of a secondary infiltration surface (10d; 110d). extends to at least a portion of a primary infiltration surface (10c; 110c). Rigole according to claim 1,
characterized in that a further filter layer (28; 128) is provided at least on a part of the side of the liquid-conducting layer (26; 126) remote from the trench volume (10b; 110b). Rigole according to claim 1 or 2,
characterized in that the filter layer (26; 126) or / and the further filter layer (28; 128) is formed by a nonwoven layer. Rigole according to one of claims 1 to 3,
characterized in that the filter layer (24; 124), the liquid-conducting layer (26; 126) and optionally the further filter layer (28; 128) are joined together to form a prefabricated drainage unit (30; 130). Rigole according to one of claims 1 to 4,
characterized in that the liquid-conducting layer (26; 126) is flexible. Rigole according to one of claims 1 to 4,
characterized in that the liquid-conducting layer (26; 126) is formed as a rigid plate. Rigole according to one of claims 1 to 6,
characterized in that the trench (10) is composed of a plurality of trench elements (10a). Rigole according to one of claims 1 to 7,
characterized in that the trench volume (110b) comprises a plurality of Rigolenteilvolumina (110b1, 110b2, 110b3) whose surfaces are at least partially adjacent to each other. Rigole according to claim 8,
characterized in that in the region of adjoining surfaces of two rigid part volumes (110b1, 110b2) the one liquid part volume (110b1) associated liquid-conducting layer and the other Rigolenteilvolumen (110b2) associated liquid-conducting layer of one and the same liquid-conducting layer (126 ') are formed. Rigole according to claim 9,
characterized in that, in the region of adjoining surfaces of two partial volumes of trench part (110b1, 110b2), the filter layer (124 ') of a prefabricated drainage unit (130') acts as the filter layer of one trench part volume (110b1) and the further filter layer (128 ') of the prefabricated drainage unit (110b1) 130 ') serves as the filter layer of the other bulk part volume (110b2). Rigole according to one of claims 4 to 10,
characterized in that a first prefabricated drainage unit (130 ') is placed with its end face on a surface region of a second prefabricated drainage unit (130), from which the filter layer (124) and / or the further filter layer has been at least partially removed.

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