EP3674493A1 - Puisard - Google Patents

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Publication number
EP3674493A1
EP3674493A1 EP19219711.9A EP19219711A EP3674493A1 EP 3674493 A1 EP3674493 A1 EP 3674493A1 EP 19219711 A EP19219711 A EP 19219711A EP 3674493 A1 EP3674493 A1 EP 3674493A1
Authority
EP
European Patent Office
Prior art keywords
gulley
outlet
pot
infiltration
level
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.)
Granted
Application number
EP19219711.9A
Other languages
German (de)
English (en)
Other versions
EP3674493B1 (fr
Inventor
Jacobus Gerhard Nicolaas SCHOTANUS
Franciscus Hendricus VAN NULAND
Johannes Cornelis Willemsen
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.)
Schotanus Jacobus Gerhard Nicolaas
Van Nuland Franciscus Hendricus
Willemsen Infra BV
Original Assignee
Willemsen Infra BV
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
Application filed by Willemsen Infra BV filed Critical Willemsen Infra BV
Publication of EP3674493A1 publication Critical patent/EP3674493A1/fr
Application granted granted Critical
Publication of EP3674493B1 publication Critical patent/EP3674493B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F5/0401—Gullies for use in roads or pavements
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F5/0401—Gullies for use in roads or pavements
    • E03F5/0403—Gullies for use in roads or pavements with a sediment trap
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F5/0401—Gullies for use in roads or pavements
    • E03F5/0404—Gullies for use in roads or pavements with a permanent or temporary filtering device; Filtering devices specially adapted therefor
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F5/0401—Gullies for use in roads or pavements
    • E03F5/0405—Gullies for use in roads or pavements with an odour seal
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F2005/0416—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps with an odour seal

Definitions

  • the subject disclosure relates to gullies for receiving storm water, usually collected from street surfaces, and discharging the storm water through an outlet in a rainwater sewer system.
  • Gulley's as described above are well known for collecting rain water or storm water in streets, sidewalks, gutters etc. and generally comprise a gulley pot, e.g. a plastic, cast-iron or concrete receptacle buried in the ground and comprising a bottom wall and a number of side walls.
  • a gulley pot e.g. a plastic, cast-iron or concrete receptacle buried in the ground and comprising a bottom wall and a number of side walls.
  • a gulley pot In a side wall of the gulley pot an outlet is positioned which is coupled to a sewer system. Water received in the gulley pot exits via the outlet to the sewer system. The drain is generally offset from the bottom wall.
  • water and pollution refuse, debris, leaves, sand, oil, etc.
  • a baffle extending to below the underside of the outlet serves as an odour trap and it may prevent pollution floating on the water from entering the sewer system.
  • NL1005621 discloses a drain sump for road gutters, comprising a concrete body and a cast iron connection into the concrete drain pipe.
  • the cast iron connection is anchored by a flange into the sump body during moulding of the concrete of the sump body.
  • the cast iron connection comprises a front chamber.
  • a cast iron baffle for an odour trap may be installed such that it is rotatable.
  • EP2796628A1 discloses a gulley comprising a gulley pot, an outlet and a baffle.
  • the baffle is attached to the gulley pot such that the baffle is movable between a first stable position with respect to the gulley pot in which position the baffle overlaps and covers the outlet and extends below an underside of the outlet and a second stable position with respect to the gulley pot in which position the outlet is substantially uncovered by the baffle.
  • CN207062678U discloses a road drainage structure.
  • the structure includes a roadbed, a vegetation layer, a soil layer, a water filtering sand layer, a water filtering gravel layer, a water filtering channel, a drainage body, an overflow pipe, an overflow well, and a liquid level sensor.
  • the water flows from the roadbed, through the layers and water filtering channel into the drainage body.
  • the liquid level in the drainage body exceeds a top edge of the overflow pipe in the drainage body, the water flows through the overflow pipe into the overflow well.
  • CN206205290U discloses a roof rainwater collecting and processing system.
  • the system comprises a rainwater seepage well with an inlet pipe, infiltration pipe and an outlet pipe.
  • the infiltration pipe extends radially outward.
  • a gravel layer surrounds the infiltration pipe.
  • the bottom of the seepage well is covered with gravel and another gravel layer below the gravel forming the bottom of the seepage well. After two layer filtering the water enters the ground to replenish groundwater.
  • this object is achieved by a gulley having the features of claim 1.
  • Advantageous embodiments and further ways of carrying out the present technology may be attained by the measures mentioned in the dependent claims.
  • a gulley according to the subject technology comprises a gulley pot, a sewer outlet in a side wall of the gulley pot and a baffle configured to act as odour trap.
  • the sewer outlet is configured to couple the gulley to a sewer system and has an underside defining a normal outflow level L norm .
  • the baffle has an underside defining a minimal liquid level L min to enable the baffle to act as odour trap.
  • the gulley pot further comprises at least one infiltration outlet being configured to transfer liquid in the gulley pot to the ground around the gulley when the liquid level in the gulley pot exceeds a drainage outflow level L drain , wherein L min ⁇ L drain ⁇ L norm .
  • the concept of the present technology is to have a gulley pot which is coupled to an additional reservoir that is filed with an amount of storm water before substantially all further storm water is supplied to the sewer system.
  • the additional reservoir facilitates infiltration of the collected water as a reverse drainage system into the soil around the gulley.
  • the additional reservoir will normally be empty.
  • the first storm water will be collected in the gulley pot. Due to evaporation of water in the gulley pot during the dry period, the water level will be below the level L drain .
  • the liquid level will become higher than L drain liquid will flow through the at least one infiltration outlet into the additional reservoir that is in fluid flow connection with the infiltration outlet.
  • the additional reservoir will almost immediately start infiltration of the liquid in the soil.
  • the liquid level in the gulley pot will start rising as soon as the liquid level in the additional reservoir becomes at the same level in the gulley pot. From that moment, substantially all storm water will flow away via the sewer outlet into the sewer system. When it stops raining, the water in the additional reservoir infiltrates the soil around the gulley pot till the additional reservoir is empty and the procedure above can be started again. In this way, it might be possible that during a small rain shower most storm water is released to the soil around the gulley pot and that only during heavy rain shower a considerable part of storm water is discharged through the sewer outlet into the sewer system. When L drain is smaller than L norm the inflowing storm water has to fill the additional reservoir first before some storm water will flow into the sewer system.
  • the gulley pot retains its function to accumulate dirt at its bottom. As a result, only parts that float in or float on the water can reach the infiltration outlet and probably after accumulation in the infiltration outlet obstruct the flow of water to infiltrate the soil around the gulley pot.
  • the gulley further comprises an insert part configured to be inserted in the sewer outlet and further configured to increase the liquid outflow level L norm for liquid in the gulley pot to the sewer system to a new outflow level L new , wherein L norm ⁇ L new .
  • the sewer outlet has a height H, and H/3 ⁇ (L new - L norm ) ⁇ H/2. It has been found that an insert part which increases the outflow level of the gulley pot in the range H/3 - H/2 still provides the outlet enough outflow capacity to discharge enough storm water to the sewer system during heavy rain showers.
  • the insert part is a removable part. This feature enables one to provide full access to duct coupled to the outlet for inspection and or cleaning.
  • the gulley comprises a filter element positioned in each of the at least one infiltration outlet.
  • the filter element comprises a material that makes the filter element impermeable for oil and permeable for water. The filter element counteracts accumulation of dirt in the reservoir. The impermeability to oil reduces the risk of contamination of the soil around the gulley.
  • the filter element comprises a layer of pervious concrete arranged in an opening through the side wall of the gulley pot for the infiltration outlet. This feature provides a robust filter that could easily be cleaned by for example a high pressure washer.
  • the filter element further comprises a check valve arrangement configured to block liquid to flow through an infiltration outlet into to gulley pot.
  • the gulley further comprises a porous layer attached to at least a portion of the outer surface of the side wall of the gulley pot, wherein the porous layer extends over the openings of the at least one infiltration outlet. The cavities in the porous layer from the reservoir and surfaces of water-filled porous layer that are contact with the soil drain liquid to the soil. In this way, the infiltration surface to the soil is enlarged.
  • the porous layer extends along a bottom wall of the gulley pot. This feature enlarges to surface being in contact with the soil and consequently the flow capacity to drain storm water to the soil.
  • the porous layer is a layer of pervious concrete. This feature provides a gulley with reservoir that can be applied in a similar way as existing gullies with a concrete gulley pot.
  • the filter element comprises pervious concrete, made of finer gravel than gravel of the porous layer attached to the outer surface of the side wall.
  • the porous layer has a thickness of at least 4 cm, more particular 6 cm.
  • sewer outlet has a first radius and each of the at least one infiltration outlet has a second radius, wherein the second radius is smaller than the first radius.
  • the gulley pot comprises four or more plane sidewalls. Side walls other than the side wall comprising the sewer outlet comprise one or more infiltration outlets. This feature enlarges the drainage flow capacity to drain water to the soil.
  • the gulley comprises drainage means coupled to the at least one infiltration outlet, wherein the drainage means are configured to transfer liquid from the gulley pot to the ground around the gulley.
  • the drainage means comprises at least one of: infiltration pipes, perforated ducts and infiltration box.
  • Figs. 1 and 2 show a gulley 100 comprising a lid or cover grate 110 for collecting rain water or street cleaning water in streets, sidewalks, gutters etc. and a gulley pot 102 having an interior volume for receiving the water and associated pollution passing the cover grate 110.
  • the gulley pot 102 comprises a bottom 102A and side walls 102B, a sewer outlet 104, at least one infiltration outlet 108 and a drainage means 112.
  • the drainage means 112 enables the water flowing through an infiltration outlet 108 to be absorbed by the soil around the gulley.
  • the drainage means 112 is a porous layer which is attached to the outside of one or more side walls 102B of the gulley pot 102 and preferably extends along the sidewall from the bottom of the side wall to at least a level above the hole through the sidewall for the infiltration outlet 108.
  • the sewer outlet 104 is configured to be coupled to a drain piping of e.g. a storm water drainage system (not shown) and comprises a baffle assembly 106.
  • the sewer outlet has an opening with a height H.
  • baffle assemblies are known from NL100561C2 and NL2004578C .
  • the baffle assembly 106 is configured to act as odour trap. In principle any arrangement configured to act as odour trap in a gulley could be used.
  • the infiltration outlet 108 of the gulley forms a passage for water in the gulley pot 102 to drainage means.
  • the sewer outlet 104 has a water outflow level L norm that is defined by the underside 104A of opening of the sewer outlet 104.
  • the infiltration outlets 108 are holes through the side wall of the gulley pot 102 and arranged at substantially the same height in the side walls 102B.
  • the undersides 108A of the infiltration outlets 108 define an additional outflow level L drain .
  • the additional outflow level L drain is at a lower level than the normal level L norm .
  • the baffle assembly 106 defines a level Lmin by the lower side 106A of the baffle.
  • the baffle means 106 prevent escaping sewer odour from the storm water drainage system. It should be noted that the height difference between L drain and L min depends on the climate wherein the gulley is used. The height difference should be sufficient such that during dry periods, less water evaporates than is present in the pot between said two levels.
  • the drainage means 112 is a porous layer.
  • the porous layer has a thickness of at least 4 cm, and more particular 6 cm.
  • the porous layer is a layer of pervious concrete.
  • the porous layer may be obtained by a mixture of two or three component epoxy bonding mortar and gravel with a grainsize of 4-16mm. In another embodiment gravel with a grainsize of 4-12mm is used. Other mortars and gravel sizes might be used for obtaining the porous layer as long as the layer comprises sufficient cavities and passages between the gravel to pass the water from the infiltration outlet to the soil and to buffer an amount of water.
  • the gulley according to the present technology functions as follows.
  • the absorbency of the soil, the buffer capacity of the drainage means and buffer capacity of the gulley pot defined by the height difference L norm - L drain will not be sufficient to store and drain the water into the soil. In that case, water will leave the gulley via outlet 104 into the storm water drainage system. When it stops raining, the soil will absorb the water supplied by the drainage means and consequently the water level in the gulley pot will be lowered to the level L drain . So, the volume of water in the gulley pot present between the levels L norm and L drain will be absorbed by the soil and the emptied corresponding volume is available as buffer for the next rain shower.
  • the present technology enables the gulley to drain most of the rain water to the soil around the gullet and significantly reduces the amount of water that is drained via the storm water drainage system.
  • Fig. 2 shows schematically a sectional view of a second embodiment of a gulley according to the present technology.
  • an existing gulley pot 102 used as part of a gulley according the present technology.
  • the one or more infiltration outlets 108 are drilled in the side walls such that the lower side of the one or more infiltration outlets 108 is at substantially the same level as the lower side of the sewer outlet 104. This ensures that there is enough water in the gulley to prevent escaping of sewer odours from the storm water drain system over dry periods.
  • porous material is arranged against sidewalls of the gulley pot 102 from the bottom up to a level above the infiltrations outlets 108 to form the drainage means 112.
  • An insert part 214 is positioned in the opening of the sewer outlet 104 to increase the outflow level from the gulley to the storm water drain system to level L new . In this way, the discharge capacity of the drainage means 112 and soil around the gulley has to be used before rain water leaves the gulley via the sewer outlet 104.
  • L drain L norm .
  • the height of the insert is preferably smaller than H/2, wherein H is the diameter/height of the opening of the sewer outlet 104.
  • the diameter of the sewer outlet 104 is 125 mm and the diameter of the infiltration outlets 108 is 80 mm. It is noted that other diameters might be used, however preferably the diameter is the infiltration outlets is smaller than the diameter of the sewer outlet.
  • Fig. 3 shows schematically a sectional view of a third embodiment of a gulley according to the present technology using an existing gulley pot 102 with another type of baffle assembly 306.
  • the one or more infiltration outlets 108 are drilled in the side walls such that the lower side of the one or more infiltration outlets 108 is at substantially the same level as the lower side of the sewer outlet 104.
  • porous material is affixed against sidewalls of the gulley pot 102 from the bottom up to a level above the infiltration outlets 108 to form the drainage means 112.
  • An insert part 314 is positioned directly in the discharge pipe coupling the gulley to the storm water drain system to increase the outflow level of the existing gulley pot 102 to the new level L new .
  • Fig. 4 shows schematically a perspective view of a gulley pot 102 according to the subject disclosure.
  • the gulley pot is obtained by drilling 6 infiltration outlets 108 in an existing block shaped gulley pot 102 with four flat rectangular sidewalls. Therefore, the underside of the sewer outlet 104 is at the same level as the underside of the infiltration outlets.
  • the outflow level into the storm water system could be increased while the existing baffle (not shown) could be used to provide the same odour trap as in the original gulley pot.
  • Fig. 5 shows schematically a perspective view of the gulley pot in Fig. 4 provided with a porous layer forming the drainage means 112.
  • FIG. 6 shows schematically a sectional view along VI-VI in Fig. 5 and Fig. 7 shows schematically a sectional view along VII-VII in Fig. 6 .
  • the sewer outlet 104 has a first radius and each of the infiltration outlets have a second radius, wherein the second radius is smaller than the first radius.
  • the openings in the gulley pot 102 forming the infiltration outlets 108 might be used to position a filter element.
  • the filter element is configured to prevent that the porous layer attached to the outer surface of the gulley pot gets blocked by dirt that flows into the gulley.
  • the filter element could be a replaceable filter element.
  • the filter element is made from pervious concrete obtained by a mixture of epoxy mortar and sand with a grainsize of 0,6 - 1,2mm. The openings through the gulley pot for the infiltration outlets are filled with said mixture. The filter element is thus made of finer gravel than the gravel of the porous layer.
  • Figs 8A and 8B show schematically a section view of two states of an embodiment of another embodiment of a filter element 800.
  • the filter element is a replaceable filter element.
  • the filter element 800 comprises a material 802 that is impermeable for oil and permeable for water.
  • the filter element 800 comprises a check valve arrangement which opens when water pressure in the gulley pot acting on the shutters is higher than the water pressure acting on the other side of the shutters and which closes when the water pressure acting on the other side of the shutters is higher than the water pressure acting on the side facing the inside of the gulley pot 102.
  • the shutters prevent groundwater to flow into the gulley pot. In this way, ground water is blocked to flow through the gulley into the storm water drainage system or sewer system that when the ground water level is higher than the level L drain .
  • the drainage means 112 are a porous layer 112 attached to at least one side wall of the gulley pot and wherein the porous layer extends fully across the hole in the sidewall of the gulley pot for the at least one infiltration outlet. Furthermore, it is shown that the porous layer might extend along a bottom wall of the gulley pot. In an embodiment the porous layer is a layer of pervious concrete. It might be clear that other materials can be used that have the characteristics of permeable for water and capacity to store temporarily an amount of water to be absorbed by the soil abutting the porous layer. Furthermore, the material of the layer should be strong enough to withstand the pressure of the soil acting on the outer surface of the layer.
  • the drainage means is a plastic tray with reinforcement ribs in which the gulley is placed and where the outer wall is perforated.
  • the reinforcement ribs function as spacers between the outer wall and gulley pot.
  • the space between the outer wall and the gulley pot forms the cavity to buffer rain water before it is absorbed by the soil surrounding the gulley pot.
  • the drainage means configured to transfer water from the gulley pot to the ground around the gulley.
  • infiltration pipes, perforated ducts and infiltration boxes could be coupled to the infiltration outlets.
  • the pipes or tubes might be twisted around the gully pot.
  • the pipes or tubes extend horizontally or slope downward away from the gulley pot to enlarge the ground surface that could absorb directly water coming from the gully pot.
  • the space in the tubes will function as buffer to store temporarily rain water before it infiltrates the soil around the tubes or pipes.
  • the buffer to temporarily store rain water before it infiltrates the soil around the gulley pot can be extended by channels in the ground, which adjoin the porous layer affixed to the outside of the gulley pot.
  • the channels should preferably be filled with broken stone with a grainsize of 7-32mm, wherein the channel of broken stones is encapsulated by PE filter fabric.

Landscapes

  • 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)
EP19219711.9A 2018-12-24 2019-12-24 Puisard Active EP3674493B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2022311A NL2022311B1 (en) 2018-12-24 2018-12-24 Gulley

Publications (2)

Publication Number Publication Date
EP3674493A1 true EP3674493A1 (fr) 2020-07-01
EP3674493B1 EP3674493B1 (fr) 2023-06-07

Family

ID=65031745

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19219711.9A Active EP3674493B1 (fr) 2018-12-24 2019-12-24 Puisard

Country Status (2)

Country Link
EP (1) EP3674493B1 (fr)
NL (1) NL2022311B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10968616B1 (en) * 2019-05-08 2021-04-06 Subsurface Systems, LLC Water drainage system
WO2023099768A1 (fr) 2021-12-03 2023-06-08 Rockwool B.V. Système de filtration d'eaux pluviales d'orage

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL100561C (fr)
DE2618199A1 (de) * 1975-05-23 1976-12-09 Spanberg B Anordnung an senkkaesten
NL1005621A1 (nl) 1997-03-25 1998-09-28 Tbs Soest B V Aansluiting voor een kolk.
DE10348520A1 (de) * 2003-10-18 2005-05-19 Funke Kunststoffe Gmbh Filter für mit Metall-Ionen beladene Wässer
FR2903433A1 (fr) * 2006-07-07 2008-01-11 Jean Paul Rey Dispositif d'humidification des sols de constructions
WO2011049253A1 (fr) * 2009-10-19 2011-04-28 주식회사 케이지씨 Système de pavage à blocs de pavement à vitesse ultra-haute de perméation d'eau, pour la prévention des inondations, des sécheresses, du réchauffement planétaire, de la désertification et de la montée du niveau des mers, et pour restaurer les eaux souterraines des sols, et procédé de construction utilisant ce système
NL2004578C2 (en) 2010-04-20 2011-10-21 Gemeente Amsterdam Improved gulley.
EP2796628A1 (fr) 2013-04-24 2014-10-29 D & B Ingenieurs B.V. Bonde améliorée
KR20140126467A (ko) * 2013-04-23 2014-10-31 주식회사 퍼팩트 시공 및 유지관리가 용이한 오수받이 하부 구조
CN106219758A (zh) * 2016-08-19 2016-12-14 黄河勘测规划设计有限公司 适于河流及湖泊滨水带生态修复与水质净化的护岸结构
CN206205290U (zh) 2016-11-29 2017-05-31 胡世琴 一种屋面雨水收集处理系统
CN207062678U (zh) 2017-05-03 2018-03-02 刘鸿斌 一种市政道路排水结构

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL100561C (fr)
DE2618199A1 (de) * 1975-05-23 1976-12-09 Spanberg B Anordnung an senkkaesten
NL1005621A1 (nl) 1997-03-25 1998-09-28 Tbs Soest B V Aansluiting voor een kolk.
DE10348520A1 (de) * 2003-10-18 2005-05-19 Funke Kunststoffe Gmbh Filter für mit Metall-Ionen beladene Wässer
FR2903433A1 (fr) * 2006-07-07 2008-01-11 Jean Paul Rey Dispositif d'humidification des sols de constructions
WO2011049253A1 (fr) * 2009-10-19 2011-04-28 주식회사 케이지씨 Système de pavage à blocs de pavement à vitesse ultra-haute de perméation d'eau, pour la prévention des inondations, des sécheresses, du réchauffement planétaire, de la désertification et de la montée du niveau des mers, et pour restaurer les eaux souterraines des sols, et procédé de construction utilisant ce système
NL2004578C2 (en) 2010-04-20 2011-10-21 Gemeente Amsterdam Improved gulley.
KR20140126467A (ko) * 2013-04-23 2014-10-31 주식회사 퍼팩트 시공 및 유지관리가 용이한 오수받이 하부 구조
EP2796628A1 (fr) 2013-04-24 2014-10-29 D & B Ingenieurs B.V. Bonde améliorée
CN106219758A (zh) * 2016-08-19 2016-12-14 黄河勘测规划设计有限公司 适于河流及湖泊滨水带生态修复与水质净化的护岸结构
CN206205290U (zh) 2016-11-29 2017-05-31 胡世琴 一种屋面雨水收集处理系统
CN207062678U (zh) 2017-05-03 2018-03-02 刘鸿斌 一种市政道路排水结构

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10968616B1 (en) * 2019-05-08 2021-04-06 Subsurface Systems, LLC Water drainage system
WO2023099768A1 (fr) 2021-12-03 2023-06-08 Rockwool B.V. Système de filtration d'eaux pluviales d'orage

Also Published As

Publication number Publication date
EP3674493B1 (fr) 2023-06-07
NL2022311B1 (en) 2020-07-21

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