DE202011102700U1 - Decentralized plant for the quantitative and material management of rainwater runoff in the area of tree stands - Google Patents

Abstract

Decentralized water management system for the quantitative and material management of rain runoff, in particular traffic areas, in the area of existing trees, in particular avenues, characterized in that tree locations (11) in the edge region of the tree root spaces (18) of trees are assigned decentralized storage and infiltration elements (19), and the storage and infiltration elements (19) are connected by means of a connecting pipe (21) to an inlet shaft (16) of a street inlet (15) for rain or surface water.

Description

The invention relates to a decentralized water management system for the quantitative and material management of rain drains, in particular of traffic areas, in the area of existing tree stands, in particular avenues.

Such water management systems such as those from the DE 10 2007 030 305 B4 are known to serve the use of rainwater, which are usually derived usually via a sewer in the mixing or separation process.

Precipitation waters are usually routed along curbs to so-called street entrances, collected in inlet ducts and discharged into a local sewer. To protect the soil and groundwater from contamination it is from the EP 1 710 361 B1 known to install filters in such street enemas, and from the DE 101 14 053 A1 It is known to pre-clean rainwater over Tiefbeete before they seep into the ground or the local sewer system are supplied.

Object of the present invention is to provide a water management system, can be prepurified with the rainwater and used specifically for irrigation of urban and other plantings.

This object is achieved by the features of claim 1, in particular by the fact that tree locations in the edge region of the tree roots of trees decentralized storage and infiltration elements are assigned, and the storage and infiltration elements are connected by means of connecting pipe with an inlet shaft of a street inlet for rain or surface waters ,

These measures will create a decentralized water management system which, in comparison to conventional drainage systems, will be used in particular for tree site applications where above-ground seepage over deep beds is not possible. This is the case in particular in the crown or root area of existing trees, whose root spaces would be damaged unfavorably by the large area requirement of a deep bed plant. In contrast, an underground infiltration system according to the type of the present invention can be designed with a low base area requirement such that the penetration of the existing root spaces is possible without substantial impairment of the trees. This system is also used where, due to the slope conditions, an above-ground feed of above-ground drainage systems from the road drains is not possible.

In both cases mentioned above, a decentralized water management has hitherto not been considered applicable and resorted to the sewerage solution with the known disadvantages.

For such an underground infiltration of the surface waters may be used in a preferred embodiment of the invention for cleaning the surface of managed street drains surface water a multi-stage filter arrangement, in which the individual filters are alternately flowed through by the water in succession in opposite directions radially. For this purpose, known filter cartridges can be provided, in which, with the formation of an inner, closed-bottom annulus, a grout-retaining filter provided with a closed bottom and below it a fine-particle retention filter provided with a perforated bottom are arranged. By this combination according to the invention a good, uniform cleaning is ensured and the water to be discharged can be safely introduced via the decentralized storage and infiltration elements in the ground or in the groundwater.

The root areas of existing tree stands are thereby significantly less or not at all affected, as is required by the excavation and shoring of otherwise usual pipeline trenches, in which large root spaces are cut.

The plurality of decentralized storage and infiltration elements results in the sum compared to central storage and infiltration of known drainage systems with the same storage volume a much larger contact area compared to the upcoming natural soil and thus at the same volume greater infiltration. This allows for a given rainfall drain a significant reduction of the storage volume in the case of decentralized solution to drainage systems with switched after basin.

Each type of material purification leads to an inevitable residual contamination, which inevitably has to be left to the respective recipient (soil, groundwater or body of water) for reception. The surface-specific residual contamination and its effect on the surrounding soil is lower in the decentralized plants according to the invention compared to a central plant due to the larger contact surface with the naturally pending soil.

The large number of decentralized plants with their respective infiltration capacities in the vicinity of the trees or their root spaces ensures irrigation of the subsoil and the root space of the trees, which comes close to a undeveloped state. In comparison, in a drainage system, the trees are deprived of water.

The construction costs and the corresponding costs are lower for the installation of a large number of decentralized management systems than for a discharge system with a switched-off basin.

The relatively small volume of the decentralized storage and infiltration allows in the vicinity of the trees or in their root room areas a böschungsfrei structural design and thus a very small footprint.

The large number of each required decentralized systems also allows a standardized and partially prefabricated execution of the elements.

By arranging a variety of these self-sufficient decentralized plants, the construction of an otherwise usual rainwater drainage system consisting of a variety of normal street drains, a sewer system and a central "end-of-pipe" system for storage, cleaning and possibly partial infiltration and its Disadvantages avoided.

In a preferred embodiment of the invention, it is provided that each one storage and infiltration element is arranged in each case between two adjacent trees. According to the invention, the storage and infiltration elements are arranged outside the root spaces of the plantings, in particular of trees. As a result, a good irrigation is achieved and avoided a growth disturbing damage to the roots.

In an advantageous embodiment of the invention, it may also be provided that an inlet shaft of a road inlet communicates via connecting pipes with a plurality of decentralized storage and infiltration elements.

It is particularly advantageous in the invention to provide the storage and infiltration elements with a storage cylinder, in which a sheathed with a geotextile hollow body element for receiving introduced through the connecting pipe surface waters is inserted. The coated with a geotextile hollow body element of a storage and infiltration element can be introduced at different depths into the soil.

Further advantageous measures are described in the subclaims. The invention is illustrated in the accompanying drawings and will be described in more detail below; it shows:

1 the top view of a tree site with two adjacent trees, between which outside of their tree root cavities a storage and infiltration element is embedded in the ground, and the storage and infiltration element is connected via a pipe connection with a street inlet for rainwater;

2 the side view of a tree location according to the section line AA 'in the 1 ,

As the 1 in a schematic plan view, is the water management system according to the invention 10 between two adjacent tree locations 11 built-in. Precipitation waters, such as rain or meltwater, those on the road 12 Seating down sealed ground is usually done by an appropriate slope along a curb 13 up to a water supply 14 a street inlet 15 directed.

As the 2 shows, points the street entrance 15 an inlet shaft 16 in which a filter cartridge 17 can be used. Such inlet shafts 16 Depending on the geological conditions are different deep and usually provided with a pre-filter.

Such a pre-filter, for example a filter cartridge 17 as he from the DE 50 2005 001 098 is known, should initially withhold washed-in coarse fractions, such as leaves, tree branches, debris, etc. Furthermore, smaller flushings, such as grit, cigarette butts, paper, etc. are to be retained.

Between two tree locations 11 is outside of their tree root spaces 18 an inventive storage and infiltration element 19 in the soil 20 buried. The storage and infiltration element 19 stands over a connecting pipe 21 with the inlet shaft 16 in connection and has a storage tube 22 on top of that by a geotextile 23 opposite the surrounding soil 20 is delimited. The connecting pipe 21 can be a commercially available hollow body special module.

To dig in the geotextile 23 First, a not shown support corset to the intended depth in the soil 20 drilled. In the support corset is a Hollow body member 24 lowered, previously with the geotextile 23 has been sheathed.

After lowering the with the geotextile 23 coated hollow body element 24 the support corset is removed from the storage cube 22 pulled out and the cavity between the geotextile 23 and the soil 20 washed in with sand.

LIST OF REFERENCE NUMBERS

10

Water management system

11

tree location

12

street country

13

curbstone

14

Rain water supply

15

street running

16

inlet shaft

17

filter cartridge

18

Tree root space

19

Storage and infiltration element

20

soil

21

connecting pipe

22

storage cube

23

geotextile

24

Hollow body member

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 2007030305 B4 [0002]
• EP 1710361 B1 [0003]
• DE 10114053 A1 [0003]
• DE 502005001098 [0025]

Claims (10)

Decentralized water management system for the quantitative and material management of rainwater runoff, in particular of traffic areas, in the area of existing trees, in particular avenues, characterized in that tree locations ( 11 ) in the edge area of the tree root spaces ( 18 ) decentralized storage and infiltration elements ( 19 ) and the storage and infiltration elements ( 19 ) by means of connecting pipe ( 21 ) with an inlet shaft ( 16 ) of a road entry ( 15 ) are connected for rain or surface waters. Water management installation according to claim 1, characterized in that the respective storage and infiltration element ( 19 ) between two adjacent tree locations ( 11 ) is arranged. Water management installation according to claims 1 and 2, characterized in that the storage and infiltration elements ( 19 ) outside the tree root spaces ( 18 ) of tree locations ( 11 ) are arranged. Water management installation according to claims 1 and 2, characterized in that the storage and infiltration elements ( 19 ) in the edge area of the tree root spaces ( 18 ) of tree locations ( 11 ) are arranged. Water management installation according to claims 1 to 4, characterized in that an inlet shaft ( 16 ) of a road entry ( 15 ) via connecting pipes ( 21 ) with several storage and infiltration elements ( 19 ). Water management installation according to one or more of the preceding claims, characterized in that the storage and infiltration elements ( 19 ) a storage cube ( 22 ), which is coated with a geotextile ( 23 ) sheathed hollow body element ( 24 ) for receiving through the connecting pipe ( 21 ) introduced precipitation waters is provided. Water management installation according to one or more of the preceding claims, characterized in that the geotextile ( 23 ) sheathed hollow body element ( 24 ) of a storage and infiltration element ( 19 ) at different depths into the soil ( 20 ) is introduced. Water management installation according to one or more of the preceding claims, characterized in that the storage and infiltration elements ( 19 ) consist of standardized, prefabricated components. Water management installation according to one or more of the preceding claims, characterized in that the cavity between the geotextile ( 23 ) and the soil ( 20 ) is washed in with sand. Water management installation according to one or more of the preceding claims, characterized in that the individual decentralized intake shafts ( 16 ) of the roadways to be managed ( 15 ) with multi-stage filter cartridges ( 17 ) are provided, in which in a closed-bottom annulus a Grobstofrhaltehaltefilter and a fines retention filter are arranged, which are alternately flowed through by the water in succession in opposite directions radially.

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