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EP0612888A1 - Améliorations concernant des éléments de drainage ou similaire et procédé pour leur fabrication - Google Patents

Améliorations concernant des éléments de drainage ou similaire et procédé pour leur fabrication Download PDF

Info

Publication number
EP0612888A1
EP0612888A1 EP93301286A EP93301286A EP0612888A1 EP 0612888 A1 EP0612888 A1 EP 0612888A1 EP 93301286 A EP93301286 A EP 93301286A EP 93301286 A EP93301286 A EP 93301286A EP 0612888 A1 EP0612888 A1 EP 0612888A1
Authority
EP
European Patent Office
Prior art keywords
core
filter material
projections
drainage element
base plate
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.)
Withdrawn
Application number
EP93301286A
Other languages
German (de)
English (en)
Inventor
Alan Bamforth
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.)
Marshall Richard
Original Assignee
Marshall Richard
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to GB9111957A priority Critical patent/GB2258792B/en
Application filed by Marshall Richard filed Critical Marshall Richard
Priority to EP93301286A priority patent/EP0612888A1/fr
Publication of EP0612888A1 publication Critical patent/EP0612888A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/024—Sectional false floors, e.g. computer floors
    • E04F15/02405—Floor panels
    • E04F15/02417—Floor panels made of box-like elements
    • E04F15/02423—Floor panels made of box-like elements filled with core material
    • E04F15/02429—Floor panels made of box-like elements filled with core material the core material hardening after application
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B11/00—Drainage of soil, e.g. for agricultural purposes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
    • E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water

Definitions

  • This invention relates to cores for drainage elements or the like and more particularly, but not exclusively, to drainage elements for use in forming sub-surface drains.
  • Prefabricated sub-surface drains which are used to remove excess water from the ground in order to, for example, improve crop growth, stabilise the ground and strengthen foundations; normally comprise layers of filter material which are held in spaced-apart relationship by a core so that water entering the element through the filter material is allowed to drain through the cavity formed by the core between the filter material.
  • Known cores usually include projections which extend transversely between the layers of filter material.
  • the ground in which the drain is inserted exerts a compressive pressure on the drain and such known drains often suffer from the disadvantage that part or sections of the core collapse under compression or sustained long term loading causing a blockage in the drainage channel formed between the layers of filter material by the core.
  • the object of this invention is to provide a core for use in a drainage element having an improved strength to weight ratio so as to be capable of withstanding greater compressive loads than known cores of equal weight and for similar spacing of projections and thickness.
  • a core for use in a drainage element comprises a base plate having a plurality of spaced-apart projections formed thereon, wherein the or each projection includes one or more strengthening ribs or grooves extending at least partially of the height of the associated projection.
  • the projections formed on the base plate extend both upwardly and downwardly from opposite sides thereof.
  • the ribs or grooves extend for the full height of the associated projection from the base to the top thereof.
  • Each projection is, preferably, frusto-conical in shape.
  • the ribs or grooves are equi-angularly spaced-apart around the curved surface of the associated projection.
  • the projections are formed in the base plate material by a moulding operation.
  • the core is, preferably, formed of a plastics material, such as high density polyethylene or similar material, by a thermo-forming process.
  • the core is tapered in cross-section so that the height of the projections increases from one side edge of the core to the opposite side edge thereof.
  • the core is impermeable to the transmission of liquids from one side thereof to the other.
  • the core is adapted to be permeable to liquids by providing apertures in the base plate in the areas thereof between the bases of the projections.
  • a drainage element comprises a core according to said one aspect of this invention having a layer of filter material mounted thereon.
  • the layer of filter material is mounted on the tops of the projections.
  • layers of filter material are disposed on both sides of the core.
  • the core is, preferably, disposed within an envelope of filter material so that both of the sides and the edges of the core are enclosed therewithin.
  • the envelope of filter material enclosing the projections of greatest height forms together therewith an integral drainage tube section.
  • the envelope of filter material extends beyond the edge of the core at one side edge thereof to enable a separate conventional drainage pipe to be inserted slidably therein to form a drainage tube section.
  • the filter material is, preferably, secured to at least the tops of the projections on one side of the core.
  • the filter material is secured to both sides of the core.
  • the filter material is secured to the core by means of adhesive, by bonding, or by fusion of the core and filter material.
  • the filter material is a geo-textile fabric.
  • a method of forming a drainage element according to said other aspect of this invention comprises drawing a length of core material according to one aspect of this invention from a supply, drawing a sheet of filter material from a supply so that the core is disposed in the central area of the filter material with the projections extending from one side of the base plate of the core in contact with filter material, and folding both of the edge portions of the filter material projecting beyond the sides of the core onto the top surface of the core to contact the base plate or the tops of the projections extending from the opposite side of the base plate.
  • the edge portions of the filter material are brought into overlapping engagement and are secured together to enclose the core therewithin and form the drainage element with a single joint line.
  • one edge portion of the filter material is folded over an additional plate disposed at one side edge of the core before being brought into overlapping engagement and being secured to the other edge portion of the filter material and/or to the core, thereby forming a sleeve at one side edge of the core into which a drainage tube can be inserted.
  • the base plate of the core is, preferably, secured to the filter material.
  • the tops of the projections of the core are secured to the filter material.
  • the overlapping edge portions of the filter material, the base plate of the core and the filter material, and the tops of the projections and the filter material are secured by means of adhesive, by fusion, or by bonding.
  • a core indicated generally at 10 comprises a base plate 12 having a plurality of projections 14 formed thereon.
  • the projections 14 are of frusto-conical shape and are each provided with ribs or grooves 16 in the curved surface of the associated projection 14.
  • the ribs or grooves 16 are equi-angularly spaced-apart around the curved surface of the frusto-conical projection and extend for the full height of the projection 14 from the base to the top thereof.
  • the ribs or grooves 16 in the curved surface of the projections 14 increase the ability of the core 10 to withstand compressive loading imposed on the tops of the projections 14 without increasing the thickness of the material and thus the weight of material used to form the core 10.
  • the formation of the projections 14 with ribs or grooves extending for the full height of the associated projection 14 from the base to the top thereof provides optimum strength under compressive loading but it is of course possible to provide ribs or grooves which extend for only part of the height of the associated projection if required.
  • the core 10 is formed of a plastics material by a thermo-forming process, the projections 14 being produced as hollow formations from the material of the base plate 12.
  • the formation of the ribs or grooves 16 in the curved surface of the frusto-conical projections 14 is particularly suitable for production by vacuum or pressure forming and suitable plastics materials are high density polyethylene, high impact polystyrene or the like.
  • the base plate 12 is either left as a complete sheet so that the core 10 is impermeable to the transfer of liquid from one side to the other or a plurality of holes or apertures (not shown) are formed in the base plate 12 between the projections 14 to make the core 10 permeable to the transfer of liquid where this is desirable.
  • FIG. 20 An alternative shape of core indicated generally at 20 is shown in Figure 2 of the drawings.
  • the projections 22 are of reduced height and greater area than those of the core 10.
  • Strengthening ribs or grooves 24 are again formed on the curved surface of the frusto-conical projections 22 and although this core 20 is of a different shape to the core 10 it is produced by the same method and from the same material as the core 10.
  • the core is formed with projections extending upwardly from one side of the base plate and downwardly from the opposite side of the base plate.
  • the two sets of projections can be of equal or different heights.
  • a drainage element indicated generally at 30 comprises a core 10 as described above in said one embodiment.
  • the core 10 is enclosed in an envelope of filter material 32 formed of, for example, a geo-textile fabric.
  • the filter material 32 is secured to the tops of the projections 14 by adhesives, by fusion or by bonding.
  • the filter material 32 can also be secured to the base plate 12 by adhesives, by fusion or by bonding.
  • the base plate 12 is provided with holes or apertures so that it is permeable to the transfer of liquid from one side to the other.
  • the filter material 32 is only provided on one side of the core 10 extending across and secured to the tops of the projections 14.
  • the envelope of filter material 32 is extended at the lower edge of the core 10 to form a sleeve into which a drainage tube can be inserted to carry away the liquid which drains into the core 10 through the filter material 32 from the ground into which the drainage element 30 is installed.
  • an alternative drainage element 40 comprises a core 42 having similar projections 44 to the previously described cores 10 and 20 but the height of the projections 44 increases towards the lower side of the element 40 so that it is of tapered cross-section.
  • the core 42 is again enclosed in an envelope of filter material 46 as previously described.
  • the larger cross-sectional area of the element 40 at the lower side thereof increases the volume of liquid which can be drained therethrough so that the provision of a separate drainage tube is obviated.
  • a machine indicated generally at 50 for the continuous production of the above described drainage elements comprises a table 52 having a supply roll of core 54 and a supply roll of filter material 56 at one end and a haul -off unit 58 at the opposite end for drawing the finished drainage element 60 off the table 52 where it is collected on a wind up roller 62.
  • the core 54 is drawn onto the table 52 through a bonding unit 64 which applies adhesive to one or both sides of the core 54.
  • the filter material 56 is drawn onto the table so that it is disposed beneath the lower projections extending from the core 54.
  • the core 54 and filter material 56 pass over a forming roller 66 and beneath a pressure plate 68 to secure the filter material 56 to the lower projections extending from the core 54.
  • the forming roller 66 is not greater in width than the width of the core 54 to enable the side portions of the filter material 56 to be folded upwardly and inwardly onto the top of the base plate or projections of the core 54 as the filter material 56 and core 54 move further along the table 52.
  • One side portion of the filter material 56 passes around a sleeve forming plate 70 before the two edges of the filter material 56 are drawn together on top of the core 54 and secured to the core 54 by adhesive to complete the formation of the drainage element 60.
  • the position of the plate 70 is adjustable to vary the size of sleeve portion 72 which is formed at the side edge of the drainage element 60 thereby enabling different diameters of drainage tubes to be fitted to the element.
  • a draw cord 74 is inserted into the sleeve portion 72 to facilitate subsequent insertion of the drainage tubes when installing the drainage element in the ground.
  • the utilisation of this method of forming the drainage element 60 enables the element to be continuously produced with only a single joint line of the filter material even where a drainage tube sleeve is provided.
  • cores can be used as a void former in access flooring, in other fabrications such as door or wall panels, liners for cooling towers, a crushable cushion layer for energy absorption, for use in gas vents or fixing systems for securing heating pipes to walls or floors.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Paleontology (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Filtering Materials (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
EP93301286A 1991-06-04 1993-02-22 Améliorations concernant des éléments de drainage ou similaire et procédé pour leur fabrication Withdrawn EP0612888A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9111957A GB2258792B (en) 1991-06-04 1991-06-04 Improvements in or relating to drainage elements or the like and meth od of manufacturing same
EP93301286A EP0612888A1 (fr) 1991-06-04 1993-02-22 Améliorations concernant des éléments de drainage ou similaire et procédé pour leur fabrication

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9111957A GB2258792B (en) 1991-06-04 1991-06-04 Improvements in or relating to drainage elements or the like and meth od of manufacturing same
EP93301286A EP0612888A1 (fr) 1991-06-04 1993-02-22 Améliorations concernant des éléments de drainage ou similaire et procédé pour leur fabrication

Publications (1)

Publication Number Publication Date
EP0612888A1 true EP0612888A1 (fr) 1994-08-31

Family

ID=26134188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93301286A Withdrawn EP0612888A1 (fr) 1991-06-04 1993-02-22 Améliorations concernant des éléments de drainage ou similaire et procédé pour leur fabrication

Country Status (2)

Country Link
EP (1) EP0612888A1 (fr)
GB (1) GB2258792B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000042258A1 (fr) * 1999-01-15 2000-07-20 Walter Gutjahr Feuille de drainage
GB2388614A (en) * 2002-05-17 2003-11-19 Charles William Jack Ayers Spacer device for a cavity wall
US6878447B2 (en) 2000-09-20 2005-04-12 Reedhycalog Uk Ltd Polycrystalline diamond partially depleted of catalyzing material
WO2005065941A1 (fr) * 2003-12-18 2005-07-21 Illinois Tool Works, Inc. Film lamine croise, embosse
US7681669B2 (en) 2005-01-17 2010-03-23 Us Synthetic Corporation Polycrystalline diamond insert, drill bit including same, and method of operation
DE102009044412A1 (de) 2009-10-05 2011-04-07 Aco Severin Ahlmann Gmbh & Co. Kg Rigolenkörper
EP3018264A1 (fr) * 2014-11-05 2016-05-11 Wischemann Kunststoff GmbH Plaque d'une structure plane de stockage d'eau

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010016295U1 (de) * 2010-12-07 2012-03-12 Rehau Ag + Co Strukturkörper für ein Rigolensystem und Rigolensystem
DE102012100552B4 (de) * 2012-01-24 2015-12-31 Aco Severin Ahlmann Gmbh & Co. Kg Rigolenkörperflächeneinheit
CN110130404B (zh) * 2019-05-20 2020-12-29 宁波建工建乐工程有限公司 一种地下室底板排水板及其施工工艺

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0075993A1 (fr) * 1981-09-25 1983-04-06 A.A.R.C. (Management) Pty. Limited Tuyau de drainage
WO1983002790A1 (fr) * 1982-02-05 1983-08-18 Gemmell, Daniel, Paterson Dispositif de drainage
WO1988000997A1 (fr) * 1986-07-31 1988-02-11 Schmidt Reuter Ingenieurgesellschaft Mbh & Co Kg Plancher a cavites
FR2608652A1 (fr) * 1986-12-19 1988-06-24 Sugimoto Mikio Feuille de drainage pour travaux de construction
WO1991000395A1 (fr) * 1989-06-26 1991-01-10 Sealed Air Corporation Feuille stratifiee pour la protection des murs verticaux souterrains

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0124500B1 (fr) * 1983-03-31 1989-08-30 Monsanto Company Matte de drainage flexible et étirée

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0075993A1 (fr) * 1981-09-25 1983-04-06 A.A.R.C. (Management) Pty. Limited Tuyau de drainage
WO1983002790A1 (fr) * 1982-02-05 1983-08-18 Gemmell, Daniel, Paterson Dispositif de drainage
WO1988000997A1 (fr) * 1986-07-31 1988-02-11 Schmidt Reuter Ingenieurgesellschaft Mbh & Co Kg Plancher a cavites
FR2608652A1 (fr) * 1986-12-19 1988-06-24 Sugimoto Mikio Feuille de drainage pour travaux de construction
WO1991000395A1 (fr) * 1989-06-26 1991-01-10 Sealed Air Corporation Feuille stratifiee pour la protection des murs verticaux souterrains

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000042258A1 (fr) * 1999-01-15 2000-07-20 Walter Gutjahr Feuille de drainage
US6878447B2 (en) 2000-09-20 2005-04-12 Reedhycalog Uk Ltd Polycrystalline diamond partially depleted of catalyzing material
GB2388614A (en) * 2002-05-17 2003-11-19 Charles William Jack Ayers Spacer device for a cavity wall
GB2388614B (en) * 2002-05-17 2004-11-24 Charles William Jack Ayers Further improvements in or relating to a spacer device for a cavity wall
US7655104B2 (en) 2003-12-18 2010-02-02 Illinois Tool Works, Inc. Method of forming a embossed, cross-laminated film
AU2004311902B2 (en) * 2003-12-18 2009-05-28 Illinois Tool Works Inc. Embossed, cross-laminated film
WO2005065941A1 (fr) * 2003-12-18 2005-07-21 Illinois Tool Works, Inc. Film lamine croise, embosse
US7681669B2 (en) 2005-01-17 2010-03-23 Us Synthetic Corporation Polycrystalline diamond insert, drill bit including same, and method of operation
US7874383B1 (en) 2005-01-17 2011-01-25 Us Synthetic Corporation Polycrystalline diamond insert, drill bit including same, and method of operation
DE102009044412A1 (de) 2009-10-05 2011-04-07 Aco Severin Ahlmann Gmbh & Co. Kg Rigolenkörper
WO2011042415A1 (fr) 2009-10-05 2011-04-14 Aco Severin Ahlmann Gmbh & Co. Kg Corps à rigoles
US20120255624A1 (en) * 2009-10-05 2012-10-11 James Canney Drainage body
DE202010018411U1 (de) 2009-10-05 2016-05-30 ACO Severin Ahlmann GmbH & Co Kommanditgesellschaft Rigolenkörper
EP3018264A1 (fr) * 2014-11-05 2016-05-11 Wischemann Kunststoff GmbH Plaque d'une structure plane de stockage d'eau

Also Published As

Publication number Publication date
GB9111957D0 (en) 1991-07-24
GB2258792A (en) 1993-02-24
GB2258792B (en) 1996-03-13

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