EP1260640B2 - Leaching unit - Google Patents

Abstract

The unit has a hollow body, having a base wall (120), and several connecting walls (124), away from the base wall. Part of the walls is liquid permeable providing a limit to the amount of liquid permeable. A channel (130) is provided which runs parallel to the base wall (120) and extends over a large height of base wall. The channel is designed as inspection channel (130), such that a reinforcement point of the channel is provided. Small openings are further provided on the channel.

Description

The invention relates to a trench unit according to claim 1, which is formed substantially as a hollow body and a base wall and a plurality of connecting walls which protrude from the base wall, wherein at least a part of these walls is permeable to liquid, and wherein these walls at least one Limit fluid intake volume.

For the purpose of disposing of surface water, such as rainwater, especially in larger towns and cities usually the sewer system is used. However, this type of disposal is relatively expensive, since the cross sections of the sewer lines must be dimensioned such that, for example, the resulting in a downpour rainwater can be removed easily. In addition, this type of disposal of rainwater is unecological because the rainwater can not seep into the soil on which it has fallen. It was therefore already sought in the past ways to be able to initiate rainwater into the ground even if its surface is sealed by buildings, roads, paths and the like.

For example, in the EP-A-0 943 737 a trench assembly proposed, which is composed of a plurality of trench units. This trench arrangement forms an underground water basin, which is connected on the inlet side with at least one gully, so that the rainwater collected on the sealed surface can be fed to it through the at least one gully and an optionally adjoining feed system. The bottom surface of the trench assembly is liquid-permeable, so that the rainwater supplied to it can seep into the underlying soil. On the drain side, the trench assembly can be connected to the sewage system in order to be able to prevent backflow to the surface when the accumulated rainwater quantity exceeds the absorption capacity of the soil and the trench arrangement.

A soil treatment device is in the US-A-3220194 disclosed. The known device is used for aerating, humidifying and fertilizing a soil for the treatment of soil and consists of a substantially solid-walled box, which has in its walls openings through which the surrounding soil air, fertilizers, water or the like are supplied. For the supply and discharge of these substances, the device has a box passing through, substantially full-walled tube, in the wall a number of holes are provided for the passage of the liquids. Except for the interior of the tube, the entire interior of the box is filled with a spongy material.

Further, the EP-A-0787865 a trench unit for a drainage system, which consists essentially of a cuboid cavity, in which a plurality of standing perpendicular to the bottom surface of the trench unit columns are provided. For the exchange of water between adjacent trench units, these have openings in respective opposite side walls, which in each case oppose an opening of an adjacent trench unit.

The DE-A-19705824 also describes a drainage system consisting of coupled trench units filled with a pore-forming material. These trench units also have openings for the inflow and outflow of water to be seeped in their side walls.

From the US-A-4145157 a trench unit according to the preamble of claim 1 is known. The walls of the trench unit enclose two cavities for receiving wastewater and have openings through which the water can reach the surrounding soil. The water supply of the known trench unit via a continuous channel, the lower bottom wall arranged at a greater distance, extending perpendicular to the channel grooves, which introduce the guided in the channel water through openings in the channel wall in the cavities of the trench unit.

A disadvantage of the known trench arrangement, however, is the fact that the rainwater introduced into it carries all kinds of debris, in particular dirt, dust, earth particles and leaves, carelessly discarded waste, for example cigarette butts, and the like. Also, the presence of screen baskets in the gullies as well as the provision of gullies in the feed system can not prevent a significant portion of this garbage from entering the trench assembly and contaminating it, particularly clogging the seepage openings at the bottom of the trench assembly. Since there is no possibility for cleaning in the known trench arrangement, the known trench arrangement is gradually rendered inoperative.

In addition, reference is made to the infiltration system Juncus Duobox REWATEC. This is formed by a package of perforated plastic corrugated sheets, which is penetrated approximately at half the height of a perforated plastic pipe. Due to its design as a corrugated iron core, this infiltration system has a high stability in terms of passing on or driving on. However, this design hampers the even distribution of the supplied water over the entire seepage soil area. At least the supplied rainwater in the Sickerbox can not spread as quickly as is required in a downpour. In addition, the perforations in the drainage pipe and the corrugated sheets increase relatively quickly if no suitable filter is connected upstream of the infiltration system. Although in the drainage tube basically a Cleaning lance are introduced. However, the water ejected from this cleaning lance can at best clean the perforations of the drainage pipe. On a cleaning of the entire Sickerbox, but especially the infiltration effective bottom surface, is due to the corrugated iron execution in any case.

For the sake of completeness, reference is made to the following prior art for the following documents: DE-U-299 23 191 . DE-U-200 02 627 . DE-A-38 42 012 . DE-A-197 05 824 and DE-A-198 24 456 ,

In contrast, it is an object of the present invention, a trench unit of the type mentioned in such a way that it can be easily cleaned in the laid in the ground state.

This object is achieved by a trench unit according to claim 1.

The term "inspection" encompasses both the investigation and the cleaning of the trench unit. Thus, an inspection device, for example a camera dolly, and / or a cleaning device, for example a high-pressure lance discharging water or a rinsing vehicle, can be introduced into the trench unit from time to time by the inspection channel provided according to the invention. The open at both longitudinal ends training the inspection channel ensures that when putting together a plurality of such rigging units to a trench assembly, the cleaning device can move from rigging unit to rigging unit, so as to clean the entire trench assembly. In order to work with larger and therefore more powerful cleaning device, the inspection channel extends over a large part of the height of the trench unit. Preferably, the inspection channel may extend over substantially the entire height of the trench unit.

Of course, in "normal" operation, i. when liquid, for example, as a result of rain, and the inspection channel for receiving liquid.

Since the inspection channel is bounded laterally by at least two connecting walls, it is ensured that the inspection device moves in a targeted manner along a predetermined path in the trench arrangement. The two connecting walls take up relatively little volume, so that the liquid receiving volume of the trench unit according to the invention essentially corresponds to that of a single-chamber trench unit. In particular, the connecting walls delimiting the inspection channel practically do not hinder the uniform distribution of the liquid over the entire base area of the hollow body forming the trench unit, since they are at least partially formed as a lattice structure. In addition, they increase the stability of the trench unit so that it is easily accessible and passable.

In order to be able to reach substantially the entire bottom surface of the trench unit for cleaning purposes from the inspection channel, a base surface of the inspection channel of an envelope is arranged adjacent to the base wall. In order to be able to ensure the stability of the trench unit, the base surface of the inspection channel may have a predetermined distance from the envelope, within which, for example, stabilizing or stiffening ribs may be provided. Furthermore, the base surface may be formed by a portion of the step-shaped base wall.

In order to be able to use wheeled moving inspection equipment, it is provided that the base surface of the inspection channel is formed substantially over the entire surface, i. if necessary, it is perforated by a small proportion of the total area of this base area, preferably slot-shaped openings. In this case, the preferably slot-shaped openings ensure that the water stored in the trench unit can also seep through the base surface of the inspection channel. If the longitudinal direction of these slots is substantially orthogonal to the longitudinal extent of the inspection channel, they may assist the traction of the wheel-based inspection device as it moves along the inspection channel.

To achieve the most uniform possible cleanability of the trench unit, the inspection channel may preferably be arranged approximately in the middle of the transverse extension of the trench unit.

In order to facilitate the accessibility of the inspection channel, at least one of the free ends of the inspection channel may be formed for connection to a pipeline or to a pipeline adapter. In this case, the pipe to be connected to the inspection channel may also be only a short piece of pipe for connecting the trench monolith to a shaft running vertically in the ground. This shaft can be, for example, an inspection shaft through which inspection and cleaning device can be introduced into the inspection channel. If the trench arrangement comprises a plurality of layers of trench units arranged one above the other, then at least the lowermost layer of trench units should be connected to the inspection chute, since the surface of the trench arrangement requiring seepage requires special cleaning. At the bottom of the inspection shaft may also be provided a sinking volume, in which at least part of the rainwater entrained debris can settle before the rainwater is introduced into the trench assembly. In this sinking volume but can also be flushed out by the cleaning device from the bottom of the trench assembly messed up and debris. The sink volume of the inspection well can then be cleaned in a conventional manner. Additionally or alternatively, however, the shaft can also be an overflow shaft in turn, which in turn is connected to the sewer. Therefore, the uppermost layer of trench units is preferably connected to this overflow shaft so that liquid from the trench assembly only flows into the overflow shaft when the storage volume of the trench assembly is exhausted.

At least one of the free ends of the inspection channel may further comprise an insertion slope facilitating the passage of examination and / or cleaning equipment, for example wheel-supported equipment, from trench unit to trench unit. In particular, this instruction slope allows a higher tolerance when laying the trench units.

To ensure good permeability of the walls of the liquid rigging unit, i. is intended to ensure both rainwater and under pressure ejected cleaning water, it is provided that the bottom wall and / or top wall and / or at least one other of the connecting walls is at least partially formed as a grid structure with the structure stabilizing struts and bounded by these struts Openings, these openings allow the escape and / or entry of liquid. The openings may occupy as 50%, preferably more than 75% of the total area of the respective walls or the respective wall sections.

In order to be able to further improve the accessibility or the navigability of the trench unit, it is proposed that at least one support column connecting the bottom wall to the top wall is provided, which preferably extends orthogonally between these walls.

A structurally simple construction of the trench unit results from the fact that it is formed by two trench sub-units, each of which a main wall and a plurality of this main wall, preferably substantially orthogonal, projecting. Sidewalls comprises, wherein the two Rigolenuntereinheiten are composed such that the main wall of one Rigolenuntereinheit the bottom wall of the trench unit, the main wall of the other Rigolenuntereinheit the top wall of the trench unit and mutually Kopprespondierende side walls of the two trench sub-units in pairs each a connecting wall of the Rigoleneirtheit. This assembly of the trench unit of two trench sub-units, in particular when the trench unit is made of plastic by injection molding, has the advantage that with identical design of the trench sub-units only a single tool for injection molding the trench sub-units is required. For the injection molding of advantage is in particular the formation of the trench sub-units as upwardly open basket.

For operationally fixed connection of the two trench sub-units, at least one separate connecting element can be used, for example clamp elements, latching elements, clamping elements or the like. However, it is also possible to arrange an adapter plate or an adapter frame between the two trench sub-units, which in addition to the connection of the two trench sub-units can also serve to give the trench unit a desired height.

When at least one support pillar is formed by two semi-pillars which protrude from the main wall of a respective trench sub-unit, preferably substantially orthogonally, the free ends of at least a part of these pillars may each be interconnected by a separate connector. For example, receptacles may be formed in the free ends of the half-support columns of a half-support column pair, into which a latching or clamping element can be inserted. In principle, however, the use of clamping sleeves is conceivable, which inverts over the free ends of the half-support columns.

In order to be able to ensure a stable connection of the trench units when stacking or / and juxtaposing or / and stacking a plurality of trench units to form a trench arrangement, it is proposed that the trench unit is designed such that it can be connected to an adjacent trench unit by positive locking or by attachment Separate connecting elements in at least one direction orthogonal to the succession direction is substantially immovably connected.

Fig. 1 bis 6

Rigolenanordnungen als Illustrationsbeispiele. Die in Fig. 1 bis 6 dargestellen Ausführungsbeispiele gehören nicht zum beanspruchten Gegenstand der Erfindung.

Fig. 7

eine perspektivische Ansicht einer erfindungsgemäßen Rigoleneinheit;

Fig. 8

eine perspektivische Druntersicht auf einen Teil der Rigoleneinheit gemäß Fig. 7;

Fig. 9

einen schematischen Schnitt zur Erläuterung der Verbindung zweier Rigolenuntereinheiten mittels gesonderter Verbindungselemente zu einer Rigoleneinheit; und

Fig. 10

eine schematische Darstellung einer zusammenklappbaren Rigoleneinheit im Betriebszustand (Fig. 10a) und im Lagerzustand (Fig. 10b).

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

Fig. 1 to 6

Rigole arrangements as illustration examples. In the Fig. 1 to 6 Illustrated embodiments do not belong to the claimed subject matter of the invention.

Fig. 7

a perspective view of a trench unit according to the invention;

Fig. 8

a perspective bottom view of a part of the trench unit according to Fig. 7 ;

Fig. 9

a schematic section for explaining the connection of two trench sub-units by means of separate fasteners to a trench unit; and

Fig. 10

a schematic representation of a collapsible trench unit in the operating state ( Fig. 10a ) and in storage condition ( Fig. 10b ).

In Fig. 7 is a trench unit according to the invention generally designated 100. This trench unit 100 is composed of two trench sub-units 102, of which, for reasons of clarity of illustration, only the lower one is explicitly shown, while the upper one is only indicated by dashes. The two trench sub-units 102 are identical, according to Fig. 7 as an open top "basket". To form the trench unit 100, the upper trench sub-unit 102 is turned upside down, so that the two trench sub-units 102 abut one another with their "basket openings" facing each other and thus together form a closed box structure.

In the Fig. 7 The trench sub-unit 102 shown comprises a main wall 104 and outer side walls 106 and 108. The side walls 108 are formed as a continuous lattice structure, while the side walls 106 each comprise two lattice structure sections 106a, which are separated from one another by an opening section 106b. The bottom wall 104 comprises two coarse-meshed lattice structure sections 104a, which are separated from one another by a surface section 104b. Only a small surface portion of the surface 104b is occupied by slots 104c extending transversely to the longitudinal direction L of this surface 104b. The position of the surface 104b between the two grid structure sections 104a corresponds to the position of the opening sections 106b between the associated grid structure sections 106a of the side walls 106.

In the area of the side edges of the surface 104b, further side walls 110 designed as a grid structure protrude from the main wall 104.

After joining the two trench sub-units 102 to the trench unit 100, the main wall 104 of the lower trench sub-unit 102 forms the bottom wall 120 of the trench unit 100, while the main wall 104 of the upper trench sub-unit 102 forms the top wall 122 of the trench unit 100. Corresponding side walls 106 and 108 or 110 of the trench sub-units 102 form connecting walls 124 of the trench unit 100. Finally, the main wall sections 104b and the adjoining side walls 110 of the upper and lower trench sub-units 102 together define an inspection channel 130 which guides the trench unit 100 in the direction L. completely penetrated and open at its two longitudinal ends 130a. At this time, these open ends 130a are formed by the opening portions 106b of the side walls 106 of the two trench sub-units 102.

In this way, the has in the Fig. 7 and 8th illustrated trench unit 100 via a three-chamber structure, wherein the three chambers corresponding to the two sections 104a and the one portion 104b of the main wall 104. It should be noted that in the normal caching and infiltration operation of the rigging unit 100, the inspection canister 130 also serves to receive rainwater.

In the inspection mode, however, an inspection device, ie a device for examining the state of the trench unit 100 or else a device for cleaning the trench unit 100, can be introduced into the trench unit 100 through this inspection channel 130. In the case of the use of wheel-based inspection equipment, the transverse slots 104c in the bottom surface 104b, in addition to allowing passage of liquid through this bottom surface 104b, have the task of to improve the traction of the wheels of the inspection device on the bottom surface 104b. In the region of the open ends 130a of the inspection channel 130, the bottom surface 104b also has an insertion bevel which is intended to facilitate the transfer of the inspection device from the inspection channel 130 of a considered trench unit 100 into the inspection channel 130 of the next trench unit 100 if these two trench units 100 are not precise are arranged at the same height.

For examining the condition of the trench unit 100, for example, wheel-supported camera carriages can be used. As a cleaning device, for example, lances can be used, the water eject under high pressure obliquely backwards and refer to their recoil from this recoil.

In order that the ejected water can also reach the entire liquid receiving volume of the trench unit 100, the lattice structure walls or wall sections 104a, 106a, 108 and 110 are formed as open lattice structures. That is, the area occupied by the openings 112 is larger, preferably considerably larger, than the area occupied by the webs 114 bounding these openings 112 (see FIG. Fig. 8 ). Not only in the height direction H, depth direction T and transverse direction Q extending webs 114 are provided, but also obliquely to at least two of these three spatial directions extending webs. As a result, the rigging unit 100 is given sufficient stability to be able to commit or even drive on.

In order to increase the stability of the trench unit 100, stabilizing ribs 116 are also provided below the bottom surface 104b of the inspection channel 130 or / and in the interior of the trench unit 100. In order to be able to provide these stabilizing ribs in the area of the bottom surface 104b of the inspection channel 130, this bottom surface 104 has a predetermined distance d from an envelope U of the bottom wall 104 or 120, which in practice may amount to a few centimeters.

Finally, the trench subunit 102 further comprises a plurality of semi-pillar columns 118 which project substantially orthogonally from the bottom wall 104 and form support pillars 119 in cooperation with corresponding pillar columns 118 of the respective trench sub-unit 102, which forces from the top wall 122 of the trench unit 100 to the bottom wall 120 thereof hand off.

Recesses 118b are formed in the end surfaces 118a of the semi-supporting columns 118, into which clamping bolts 140 can be inserted as separate connecting elements of the semi-supporting columns 118. The clamping effect can be achieved in different ways. For example, the clamping bolts 140 may be slightly oversized compared to the recesses 118b.

In Fig. 10 is schematically shown a collapsible trench unit 200, more specifically a trench subunit 202 of this trench unit, wherein Fig. 10a the unfolded state or ready-to-lay state or operating state and Fig. 10b shows the folded state or storage condition.

On the main wall 204, on the one hand, the side walls 206 are articulated about an axis B and, on the other hand, the side walls 208 are pivoted about an axis A. Namely, the linkage takes place with respect to the main wall 204 at different heights, according to the side walls 206 and 208 in the folded state Fig. 10b to be able to stack on top of each other to save space.

Claims (15)

1. A drainage trench unit (100) which is substantially in the form of a hollow body, the drainage trench unit (100) and/or its components being in the form of an injection-moulded part, the drainage trench unit (100) comprising

   - a base wall (120),

   - a plurality of connecting walls (124) which project from the base wall (120),
   at least one part of these walls being designed to be permeable to liquid,
   the base wall (120) being formed at least partly as a lattice structure with struts (114) stabilising the structure and openings (112) bounded by these struts (114), these openings (112) allowing the outlet and/or inlet of liquid, and
   these walls delimiting at least one liquid intake volume, and

   - a channel, which extends substantially parallel to the base wall (120), extends over a major part of the height of the drainage trench unit (100), is open at both of its longitudinal ends (130a),
   the drainage trench unit being formed by two drainage trench subunits (102), each of which comprises a main wall (104) and a plurality of side walls (106, 108) projecting from this main wall (104), the two drainage trench subunits (102) being so assembled that the main wall (104) of one drainage trench subunit (102) forms the bottom wall (120) of the drainage trench unit (100), the main wall (104) of the other drainage trench subunit (102) forms the ceiling wall (122) of the drainage trench unit (100) and mutually corresponding side walls (106, 108) of the two drainage trench subunits (102) form in pairs a respective connecting wall (124) of the drainage trench unit (100),

   characterised in that the channel (130) is in the form of an inspection channel (130) in that it is bounded laterally by at least two connecting walls and comprises a base surface, the lateral connecting walls being at least partly in the form of a lattice structure with struts (114) stabilising the structure and openings (112) which are bounded by these struts (114) and which allow the outlet and/or inlet of liquid, the base surface (104b) of the inspection channel (130) being formed substantially solid, i.e. is at most pierced by openings (104d) occupying a small proportion of the total area of this base surface (104b), and the base surface (104b) of the inspection channel (130) being arranged adjacent an envelope curve (U) of the base wall (120).
2. A drainage trench unit according to Claim 1, characterised in that the base surface (104b) of the inspection channel (130) has a predetermined distance (d) from the base wall (120).
3. A drainage trench unit according to Claim 2, characterised in that it is formed with at least one stiffening rib (116) in a height zone corresponding to the predetermined distance (d).
4. A drainage trench unit according to any one of the preceding claims, characterised in that the openings (104d) in the base surface are slot-like and their longitudinal direction extends substantially orthogonally to the longitudinal extension (L,T) of the inspection channel (130).
5. A drainage trench unit according to any one of the preceding claims, characterised in that the inspection channel (130) is disposed substantially in the centre of the transverse extension (Q) of the drainage trench unit (100).
6. A drainage trench unit according to any one of the preceding claims, characterised in that the inspection channel (130) extends over substantially the entire height of the drainage trench unit (100).
7. A drainage trench unit according to any one of the preceding claims, characterised in that at least one of the open ends (130a) of the inspection channel (130) is designed to be connected to a pipeline or to a pipeline adapter.
8. A drainage trench unit according to any one of the preceding claims, characterised in that at least one of the open ends (130a) of the inspection channel (130) is formed with an orientation slope (104d).
9. A drainage trench unit according to any one of the preceding claims, characterised in that the openings (112) occupy more than 50 %, preferably more than 75 %, of the total area of the respective wall or of the respective wall portion.
10. A drainage trench unit according to any one of the preceding claims, characterised in that at least one support column (119) is provided, which connects the bottom wall (120) to the ceiling wall (122) and which preferably extends substantially orthogonally between these walls.
11. A drainage trench unit according to any one of the preceding claims, characterised in that the two drainage trench subunits (102) are identically formed.
12. A drainage trench unit according to any one of the preceding claims, characterised in that the two drainage trench subunits (102) are connected to one another by at least one separate connecting element (140).
13. A drainage trench unit according to Claim 10 and if desired, Claims 11 or 12, characterised in that at least one support column (119) is formed by two half support columns (118) which project, preferably substantially orthogonally, from the main wall (104) of a respective associated drainage trench subunit (102).
14. A drainage trench unit according to Claim 13, characterised in that the free ends (118a) of at least one part of the pairs of half support columns (118) are in each case connected to one another by a separate connecting element (140).
15. A drainage trench unit according to any one of the preceding claims, characterised in that it is so formed that it can be connected to an adjacent drainage trench unit (100) by form-locking or by the application of separate connecting elements in a substantially non-displaceable manner in at least one direction orthogonal to the alignment direction.

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