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EP2909385B1 - Structure de drainage souterraine et son unité de base - Google Patents

Structure de drainage souterraine et son unité de base Download PDF

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Publication number
EP2909385B1
EP2909385B1 EP13760085.4A EP13760085A EP2909385B1 EP 2909385 B1 EP2909385 B1 EP 2909385B1 EP 13760085 A EP13760085 A EP 13760085A EP 2909385 B1 EP2909385 B1 EP 2909385B1
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EP
European Patent Office
Prior art keywords
chamber
access
cells
platform
base
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13760085.4A
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German (de)
English (en)
Other versions
EP2909385A1 (fr
Inventor
Stuart Edward Alan Ramella
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Polypipe Ltd
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Polypipe Ltd
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Publication date
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Publication of EP2909385A1 publication Critical patent/EP2909385A1/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
    • E03F1/002—Methods, systems, or installations for draining-off sewage or storm water with disposal into the ground, e.g. via dry wells
    • E03F1/005—Methods, systems, or installations for draining-off sewage or storm water with disposal into the ground, e.g. via dry wells via box-shaped elements

Definitions

  • the invention relates to a subterranean drainage structure according to the preamble of claim 1.
  • Drainage structures such as groundwater attenuation structures (or soakaways) are typically used to capture and retain surface water, for instance to prevent surface flooding.
  • Such structures are typically constructed from a lattice or mesh type structure which is structurally robust under a distributed load, but which has a large void fraction to accommodate the water.
  • a system of modules or cells may be used to construct a drainage structure.
  • horizontal inspection channels can be provided. Such horizontal access channels may conveniently be formed as part of the drainage structure.
  • specific cells may be used in which a horizontal through channel is defined, providing access for an inspection car.
  • Such horizontal through channels may extend through a central region of each cell.
  • the present invention seeks to overcome or ameliorate at least one of the disadvantages of the prior art.
  • the fixing means may be provided to fix the base to at least one of the cells at the first and opposite sides of the chamber
  • the platform may be arranged to enable a wheeled access car to move freely across the inspection chamber, between the access channels of cells at the first and opposite sides of the chamber.
  • the platform may be arranged to provide a smooth transition from the platform to an access channel.
  • the platform may comprise comprises a trough shaped profiled portion that communicates with an access channel.
  • the subterranean drainage structure may further comprise a geotextile wrapped around the external surface of the grid.
  • the platform may be arranged to interconnect, across the inspection chamber, an access channel opening in a central region of the first wall with an access channel opening in a central region of a second, opposite wall.
  • the groundwater attenuation structure is wrapped in a geotextile.
  • This can limit the ingress of slit and particles.
  • Such geotextile wrapping may be stably supported against the pressure of the material surrounding it by the groundwater attenuation structure.
  • a system of pipes may be connected to the drainage structure, for instance to direct surface water thereto.
  • a drainage structure 50 which may be used to control groundwater.
  • the drainage structure 50 comprises a plurality of cells 30, 40 and a base 20.
  • the drainage structure is, in use, wrapped in a geotextile (or geomembrane) layer which communicates water while inhibiting the ingress of silt and solid matter.
  • Each of the cells 30, 40 is formed from a lattice or mesh like structure with a high void fraction.
  • the cells 30, 40 thereby can accommodate a large internal volume of water, and are mechanically strong enough to support large compressive loads.
  • the cells 30, 40 in this embodiment are substantially rectangular cuboidal, and comprise a 4x4x8 repeating arrangement of a substantially cube shaped structural sub-cell.
  • Each cell 30, 40 thereby has a long axis that is twice the length of each of the two orthogonal remaining axes, and has four rectangular external faces and two substantially square external end faces.
  • the invention is not limited to such dimensions.
  • each of the cells 30, 40 comprises two identical symmetric sections, coupled together by an intermediate section.
  • the drainage cells 30, 40 comprise a plastics material. In alternative embodiments, other relative dimensions of the cells can be used and they may be formed from materials other than plastics.
  • drainage cells 40 and drainage access cells 30, Two forms of cell are provided. These are drainage cells 40 and drainage access cells 30, the latter of which include a substantially horizontal access channel 32 which extends through each access cell 30 between openings 31 which are disposed in a central region of the opposite end faces of the cell 30.
  • the access channel 32 extends parallel to the long side of the cuboidal access cell 30 and has a sectional perimeter comprising two opposite arcs linked by a straight and vertical central region.
  • the section of the channel 32 thereby has a curved lower profile, the bottom of which is offset from the lower edge of the cell 30.
  • the access channel 32 is not bounded by a continuous sheet of material, but is instead defined by the lattice or mesh like structure of the cell 30. Drainage cells 40 do not have an access channel, although further access cells 30 could be used instead of drainage cells 40 of the present embodiment.
  • the drainage structure 50 has a vertical access chamber which is defined by the omission of a cell 30, 40. It will be appreciated that in other embodiments the drainage structure 50 may comprise a plurality of stacked layers of cells, and that the vertical access chamber may be defined by the omission of a substantially vertical stack of cells. One or more cell may be omitted from each layer of cells. A substantially cuboidal void is thereby defined in the drainage structure 50 which is suitable for obtaining access, for instance for inspections.
  • the inspection chamber is bounded on each of two opposite sides by an access cell 30 with an internal channel 32 with an opening 31 facing into the inspection chamber. In an alternative embodiment, the inspection chamber may be bounded by a different number of access cells 30.
  • the horizontal channel opening 31 is provided in a central region of the access cell end wall, and the edge of the channel 32 is thereby offset from the base of the access cell 30. Omitting a cell 30, 40 to define the vertical access chamber therefore results in a step down transition from the channel 32 to the bottom of the structure where the horizontal channel exits to the chamber wall (which is formed by the end of the cell next to the chamber), and a similar step up in the other direction.
  • the base 20 of Figure 1 comprises two identical sections 10, and extends from the face of the access cell 30 in which the opening 31 is disposed, to the opposite face of the access chamber.
  • Each section 10 extends horizontally halfway across the access chamber.
  • a plurality of bases may extend across the chamber.
  • a base of a larger dimension may be used in such cases to extend across the chamber.
  • Figure 2 shows a base section 10 in more detail.
  • a single such section 10 may be used as a base 20 in its own right, and is accordingly an embodiment of the invention.
  • the access chamber may be dimensioned to be bridged with a single section 10.
  • a single section 10 may, for example, be used to bridge across the short dimension of a chamber formed by the omission of the modules 30, 40 of the example embodiments.
  • the base 20 may comprise a single section 10, that is dimensioned to be the same length as the example cells 30, 40 (in the long direction).
  • Each section 10 comprises a platform 11, a lower portion 2, fixing means 3, 3a, 4, and a shoulder profile 5.
  • the platform 11 has a trough shaped profiled portion 1 that defines a channel across the section 10.
  • the lower portion 2 is joined on two opposite sides to a substantially flat portion 6 of the platform 11 by upwardly extending respective shoulder profiles 5.
  • Each shoulder profile 5 is stepped to improve the strength of the section 10.
  • the flat portion 6 is provided with indents 7 and corresponding protrusions 7a that cooperate when two sections 10 are stacked with their platforms 11 adjacent. This would allow the upper side of the channel formed by the profiled portion to be closed by another corresponding section mounted on top of the section and inverted relative thereto.
  • the lower portion 2 is joined on the two remaining opposite sides to the platform 11 by respective vertical end walls 12 that are substantially flat. Horizontally spaced either side of the centre of the end wall 12 are first and second holes 4, which form part of a fixing means for engaging the base sections 10 with each other and adjacent drainage cells 30.
  • the lower portion 2 is joined on the two remaining opposite sides to the platform 11 by respective vertical end walls 12 that are substantially flat.
  • a first and second circular hole 4 which form part of the fixing means for engaging the base sections 10 with each other and adjacent drainage cells 30.
  • the fixing means of the section 10 comprises recesses 4 or protrusions 3, 3a, 9 arranged to cooperate with corresponding features of an adjacent section 10 or cell 30, so as to fix the section 10 and adjacent section 10 or cell 30 together.
  • each section 10 (or assembled base 20) may be provided with a fixing means comprising both one or more protrusions and one or more recesses.
  • FIGS 3 and 4 show more clearly how the two section base 20 of Figure 1 is assembled, with the corresponding protrusions and recesses of the fixing means of each section 10 cooperating with each other to fix the base 20 together.
  • the platform 11 and lower portion 2 of each section 10 combine to form a single platform 11 and lower portion 2 of the assembled two section base 20.
  • Protrusions 9 for fixing each section 10 (and hence the base 20) to an adjacent cell 30 are placed in the recesses 4 of one end wall of each section 10.
  • the protrusions 9 cooperate in use with corresponding fixing means of the adjacent cell 30 to fix the section 10 (and base 20) to the adjacent cell 30.
  • Cooperation between fixing means may be enhanced by an interference fit between corresponding features.
  • the corresponding fixing means of a cell 30 which comprises two recesses 33, that have a spacing that corresponds with that of the fixing means of the base section 10.
  • the fixing means of the cell 30 and base section 10 are arranged to cooperate to position the platform 11 in communication with the channel opening 31.
  • the protrusions 9 have an interference fit with the recesses 33, thereby securing the section 10 (and base 20) to the cell 30 in use.
  • the recesses 4 in the base section 10 have a larger diameter than the recesses 33 of the cell 30, necessitating the different design of the protrusion 9 for fixing the base 20 to the cell 30. It will be appreciated that in other embodiments matching fixing means may be used, facilitating interchangeable protrusions for either purpose.
  • the base 20 has a number of functions in use, as shown in Figures 1 and 7 .
  • the platform 11 communicates with the opening 31 of the channel 32 in the cell 30, thereby enabling access for inspection to the channel 32 from the chamber.
  • the platform 11 further enables communication of inspection means across the chamber, between access channels 32 of the two opposite access cells 30.
  • it has a lower portion 2 that mechanically supports the adjacent geotextile material by bridging between the opposite walls of the inspection chamber.
  • the lower portion 2 of the base 20 is arranged to be at substantially the same height as the base of the adjacent cells 30, 40 in use.
  • the trough shaped profiled portion of the platform 11 defines a substantially horizontal channel linking the opposite access channel openings 31 of the chamber.
  • the profiled portion 1 is arranged at the same height as the corresponding curved lower profile of the channel opening so as to provide a smooth transition from the platform 11 of the base 20 into the channel 32 of the adjacent cell 30. This smooth transition allows an inspection car to travel between the base 20 and channel 32 without needing to traverse a step, which might otherwise prevent movement of the inspection car.
  • the platform 11 provides a convenient surface from which to inspect the drainage structure 50. Because the access channel opening 31 is relatively close to the lower edge of the cell 30, the height of the platform 11 is correspondingly relatively low in relation to its length and width.
  • the base section 10 has a longitudinal axis parallel to the axis of the channel 32 with which the platform 11 communicates in use.
  • the lower portion 2 is substantially rectangular and flat, but is provided with lateral corrugations 8 that increase the flexural stiffness thereof.
  • the section 10 is dimensioned to extend fully halfway across the length of the access chamber in the longitudinal direction, not to extend fully across the chamber in the lateral direction.
  • the assembled base 20 thereby abuts the opposite walls of the access chamber in the longitudinal direction, but a gap is provided between the edges of the base 20 and the walls of the chamber (again formed by sides of the cells adjacent the chamber) that are parallel to the longitudinal direction, as is shown in Figure 1 .
  • the base may extend such that no such gap is provided.
  • Figure 7 clearly illustrates the substantially smooth and continuous transition provided by the profiled portion 11 of the base 20 between the respective channels 32 of cells 30 that are adjacent to opposite sides of the vertical access chamber.
  • An inspection means for example a wheeled inspection car, is thereby able to pass smoothly across the inspection chamber, without becoming stuck due to a sudden step, which arises at the edge of the chamber in the absence of the base 20.
  • the base 20 is engaged securely by the fixing means with a first and second cell 40 on opposite sides of the chamber.
  • the protrusions 9 and corresponding recesses 33 resist upward loads on the base 20.
  • the relatively long protrusions 3 of the fixing means that couple each section 10 of the base 20 together provides sufficient flexural strength in the central coupling of the base 20 to adequately resist upward pressure on the base 20.
  • the fixing means also serves to counteract any buoyancy that the base 20 may have when submerged.
  • each section 10 is substantially continuous, which may for instance allow each section 10 to be filled with a ballast material such as sand.
  • ballast may be used to enhance the ability of the base 20 to support the adjacent geotextile under pressure and prevent bulging of the base 20.
  • the platform may comprise perforations or openings.
  • other portions of the base 20 may comprise perforations or openings.
  • the base may be formed from an open lattice, for example of substantially vertical baffles, webs or the like.
  • the base 20 may comprise a unitary body. not claimed variants, the base 20 may provide access to only a single wall.
  • each section 10 is an embodiment of the invention.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Sewage (AREA)

Claims (6)

  1. Structure de drainage souterraine (50), comprenant :
    une pluralité de cellules de drainage à dimensions similaires (30, 40) formées en une grille rectangulaire comprenant une ou plusieurs couches sensiblement horizontales ;
    une chambre d'accès sensiblement verticale pour une inspection, formée par l'omission d'au moins une cellule (30, 40) de la ou de chaque couche ;
    une unité de base (20) positionnée au niveau de l'extrémité inférieure de la chambre, dans laquelle l'unité de base (20) s'étend sensiblement d'un premier côté de la chambre vers un côté opposé dans au moins une direction ; et
    des moyens de fixation (3, 3a, 4, 9) pour fixer l'unité de base (20) sur au moins une des cellules (30, 40) adjacentes à la chambre, dans laquelle un fond de l'unité de base (20) se situe dans sensiblement le même plan horizontal que les surfaces inférieures des cellules inférieures extrêmes (30, 40) dans la grille ; et
    dans laquelle des cellules au niveau du premier côté et du côté opposé de la chambre sont des cellules d'accès (30), comprenant chacune un canal d'accès sensiblement horizontal (32) en leur sein, dans laquelle chaque canal d'accès horizontal (32) comporte une ouverture (31) dans une paroi de la cellule d'accès (30) faisant face à la chambre, établissant ainsi un accès pour l'inspection au canal d'accès (32) à partir de la chambre ;
    caractérisée en ce que l'unité de base (20) comprend une plate-forme (11) qui s'étend d'une base des canaux d'accès (32) à travers la chambre, de sorte que la plate-forme (11) communique avec les ouvertures (31) des canaux d'accès (32).
  2. Structure de drainage souterraine selon la revendication 1, dans laquelle les moyens de fixation (3, 3a, 4, 9) sont fournis pour fixer l'unité de base (20) sur au moins une des cellules (30, 40) au niveau du premier côté et du côté opposé de la chambre.
  3. Structure de drainage souterraine selon l'une quelconque des revendications précédentes, dans laquelle les cellules d'accès (30) sont positionnées dans au moins une ligne horizontale pour former le canal d'accès les traversant à travers la grille.
  4. Structure de drainage souterraine selon l'une quelconque des revendications précédentes, dans laquelle la plate-forme (11) est disposée pour établir une transition en douceur de la plate-forme (11) vers le canal d'accès, et/ou dans laquelle la plate-forme (11) comprend une partie profilée en forme d'auge (1) qui communique avec le canal d'accès (32).
  5. Structure de drainage souterraine selon l'une quelconque des revendications précédentes, comprenant en outre un géotextile enroulé autour de la surface externe de la grille.
  6. Structure de drainage souterraine selon l'une quelconque des revendications précédentes, dans laquelle la plate-forme (11) est disposée pour interconnecter, à travers la chambre d'inspection, une ouverture du canal d'accès (31) dans une région centrale de la première paroi avec une ouverture du canal d'accès (31) dans une région centrale d'une deuxième paroi opposée.
EP13760085.4A 2012-09-03 2013-09-03 Structure de drainage souterraine et son unité de base Active EP2909385B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1215681.6A GB2505503B (en) 2012-09-03 2012-09-03 Subterranean drainage structure and base unit therefor
PCT/GB2013/052308 WO2014033485A1 (fr) 2012-09-03 2013-09-03 Structure de drainage souterraine et son unité de base

Publications (2)

Publication Number Publication Date
EP2909385A1 EP2909385A1 (fr) 2015-08-26
EP2909385B1 true EP2909385B1 (fr) 2022-04-13

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EP13760085.4A Active EP2909385B1 (fr) 2012-09-03 2013-09-03 Structure de drainage souterraine et son unité de base

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EP (1) EP2909385B1 (fr)
GB (1) GB2505503B (fr)
WO (1) WO2014033485A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2031593B1 (en) * 2022-04-14 2023-11-06 Pipelife Nederland Bv Panels for Drainage Structures
CN115506330B (zh) * 2022-09-30 2024-03-08 衢州市鑫宏土工格栅有限公司 一种高强度和平整度的排水板

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPM294493A0 (en) * 1993-12-14 1994-01-13 Urriola, Humberto Underground drainage system
DE10123754A1 (de) * 2001-05-16 2002-12-05 Kirchner Fraenk Rohr Rigolenanordnung sowie Rigolenbauteil zu dessen Aufbau
EP1607534A1 (fr) * 2004-06-18 2005-12-21 Wavin B.V. Bloc d'infiltration
MX2007009327A (es) * 2005-02-04 2007-11-14 Cubeco Systems Ltd Sistema subterraneo de aguas pluviales.
DE202005010090U1 (de) * 2005-06-24 2005-09-22 Hauraton Betonwarenfabrik Gmbh & Co Kg Rigolenelement
NL2000638C2 (nl) * 2007-05-09 2008-11-11 Pipelife Nederland Bv Doosvormige inrichting voor het opnemen van water, zoals een regenwaterbox.
GB2453713A (en) * 2007-09-03 2009-04-22 Univ Coventry Structural drainage module
US20090279953A1 (en) * 2008-05-12 2009-11-12 Cudo Stormwater Products, Inc Modular underground water management systems
DE102010045001A1 (de) * 2010-09-10 2012-03-15 Auer Packaging Gmbh Entwässerungssystem, Verfahren zu seiner Herstellung und Bauelemente hierfür

Also Published As

Publication number Publication date
WO2014033485A1 (fr) 2014-03-06
GB2505503B (en) 2017-04-12
GB2505503A (en) 2014-03-05
EP2909385A1 (fr) 2015-08-26
GB201215681D0 (en) 2012-10-17

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