Unit for a modular system of an underground rain storage power, part for a modular system, underground rain storage power, method for constructing an underground rain storage power and use of a plurality of

Abstract

The present invention relates to parts of a modular system for use as an underground rainwater storage tank, where these parts of the modular system are composed of a plurality of water-impermeable three-dimensional units, such as cuboids. Each of the water-impermeable three-dimensional cells has one or more through-holes selected from the group consisting of a concave through-hole and a convex through-hole. The concave through hole is used for being inserted into the flange of the convex through hole. The convex through-hole has a flange for insertion into the concave through-hole. The invention also relates to various additional parts of the modular system for the underground rainwater storage tank, to a method for constructing an underground rainwater storage tank, and to the use of an underground rainwater storage tank.

Description

Technical Field

[0001] The present invention relates to a modular system for use as an underground rainwater retention tank. The present invention also relates to various additional parts for the system. The present invention also relates to such an underground rainwater retention tank, to a method for assembling three-dimensional units of an underground rainwater retention tank and to the use of an underground rainwater retention tank.

[0002] The present invention has nothing to do with the so-called rainwater storage. In the technical field of the present invention, there is a difference between rainwater retention and rainwater storage. Systems for rainwater retention are able to retain rainwater for a relatively long time. Systems for rainwater storage are only able to store water for a shorter time. If a rainwater storage system is not only to store rainwater for a shorter time, but also to store rainwater for a longer time, an impermeable membrane is wrapped around the modules that are only able to retain water. The technical field of the present invention challenges the use of a permeable membrane wrapped around the modules so that these modules retain water instead of just storing water.

[0003] The underground rainwater storage systems of the prior art are usually provided with perforations and can therefore only store rainwater for a certain shortened time or also store rainwater for a certain long time. Such systems require the rainwater system to be encapsulated in an elastomeric foil commonly known as a geomembrane (made of, for example, EPDM, PP, PEHD) or a textile sheet commonly known as a geotextile. Such a membrane does not form an integral part of each of the rainwater storage modules, but is wrapped around all the modules as a giant foil during placement in the ground to make the rainwater storage system watertight. Wrapping the membrane around these modules is very cumbersome.

[0004] The present invention relates to a rainwater regulation and storage system which has no perforations in the three-dimensional units constituting the modules for constructing the underground rainwater retention system and does not need to be encapsulated in geomembranes for making the modules watertight and capable of retaining water.

[0005] WO 2009 / 140295 A1 discloses modular units, associated component parts, and assemblies of modular units and component parts useful for making and using groundwater management systems, including filtration systems. These component parts are not capable of storing rainwater for long periods of time. Furthermore, even solid embodiments are not watertight when assembled.

[0006] US2016 / 0312427 A discloses a dam support having an upper side for receiving flowing water and directing the water along the operative upper side of the dam support to distribute the water in a desired direction. The side of the dam support may have a plurality of perforations to allow water to pass through the dam support. The dam support is not watertight.

[0007] US10,597,861B discloses modular pallets having a top surface and sides, preferably four sides, and terminating in peripheral edges of the sides. Each side further defines a respective corner leg positioned away from the center leg. The top surface of each modular pallet has a plurality of through holes communicating with the internal cavity. The holes allow water or other fluids to pass through the top surface from above the pallet and into the internal cavity. These modular pallets are not watertight.

[0008] It may be an object of the present invention to provide a modular system that is capable of not only regulating but also detaining water for a longer period of time than prior art systems and without the need for any membranes to be wrapped around the modules.

[0009] It may also be an object of the present invention to provide a modular system that can be buried underground at a level closer to the ground than prior art systems.

[0010] It may also be an object of the invention to provide a modular system which can be transported and stored in a reduced space and / or at reduced costs.

[0011] It is also an object of the present invention to provide a modular system that can be buried in the ground at locations where there are obstructions below the ground.

[0012] It may also be an object of the invention to provide a modular system which can be provided with additional parts adapted to various needs of the system.

[0013] It may also be an object of the invention to provide a modular system that enables only some modules, but not all modules, to be dug out of the ground to allow access underneath the modules, and then to dig the modules (and possibly or alternatively new modules) into the ground to completely rebuild the modular system. Summary of the invention

[0014] The objects of the present invention can be achieved by a unit for a modular system for use as an underground rainwater retention pond,

[0015] - the cell is a three-dimensional cell comprising at least one main surface and at least three side surfaces, each of the side surfaces extending from a common boundary between the at least one main surface and the respective side surface, and wherein adjacent side surfaces are angled relative to each other,

[0016] - each of the side surfaces has a side edge extending from a corner of the at least one main surface, and each of the side edges of one side surface is interconnected with a side edge of another adjacent side surface,

[0017] - wherein the three-dimensional cell has an internal volume and at least one through hole in one of the side edges, the three-dimensional cell, when connected to at least one other three-dimensional cell, forms a watertight module that allows water to be contained within the three-dimensional cell or, provided that the three-dimensional cell has at least two through holes, allows water to flow through the three-dimensional cell from one through hole in one side surface to another through hole in another side surface, and

[0018] -Wherein, the at least one through hole is a concave through hole or a convex through hole, and when the through hole is a concave through hole, the through hole is used to insert into an insertion flange of a convex through hole of another three-dimensional unit, and when the through hole is a convex through hole, the through hole has an insertion flange for inserting into a concave through hole of another three-dimensional unit.

[0019] Assembling three-dimensional units of a module system for use as an underground stormwater detention tank by using male and female through-holes provides for an easy, fast and reliable assembly of the units constituting the module system.

[0020] According to a preferred embodiment of the present invention, the three-dimensional unit is made of at least two separate parts that are interconnected to thereby form the inner volume of the three-dimensional unit, each separate part having one of the following:

[0021] - at least a portion of the main surface, at least a portion of the side surfaces, at least a portion of both the main surface and the side surfaces, and at least one of the at least two separate portions has one of the following: a portion of a concave through hole, a portion of a convex through hole, the entire concave through hole, the entire convex through hole, and

[0022] -Wherein, at least a portion of each of these side surfaces has a free edge oriented opposite to the common boundary between the at least one main surface and each of these side surfaces, each of said free edges having means for connecting in a watertight manner with a free edge of a side surface of another separate part of the three-dimensional unit to form a watertight three-dimensional unit made of the at least two separate parts.

[0023] Connecting at least two separate parts of the three-dimensional unit to each other along the free edge in a watertight manner provides a three-dimensional unit capable of retaining a certain amount of rainwater, while obtaining the advantage of dividing the three-dimensional unit into smaller sized parts during manufacturing, thereby eliminating the disadvantage of having to produce the three-dimensional unit as a whole structure.

[0024] According to a preferred embodiment of the present invention,

[0025] the concave through hole has a supporting flange extending along the circumference of the concave through hole, the supporting flange being intended to limit the axial extension of the annular seal and intended to abut an annular surface of the annular seal, and

[0026] The male through-hole has an insertion flange intended for insertion into the female through-hole of the adjacent three-dimensional unit, and the outer circumference of the insertion flange is intended for retaining the annular seal and is intended for abutting against another annular surface of the annular seal.

[0027] When the flange of the convex through hole of one three-dimensional unit extends into the concave through hole of another adjacent three-dimensional unit, the concave through hole and the convex through hole, respectively having support flanges and outer circumferences for abutting various outer surfaces of the same annular seal, provide a watertight connection between adjacent three-dimensional units.

[0028] According to a possible embodiment of the invention, at least three side surfaces have free side edges extending opposite to a common border between the at least one main surface and the borders of the side surfaces,

[0029] - wherein the free side edges extend between the joined edges such that the free edges constitute the circumference of an opening of a half-sized portion of the three-dimensional cell, which opening is not a through hole,

[0030] - the opening intended to be closed by the free edge of one half-sized portion of the three-dimensional unit is assembled in a watertight manner with the equivalent free edge of another half-sized portion of the three-dimensional unit, and

[0031] - At least one side surface of the half-sized portion of the three-dimensional unit has a portion of a through hole, which portion of the through hole is preferably a portion of one of a concave through hole or a convex through hole.

[0032] Manufacturing the three-dimensional cell from half-size parts of the three-dimensional cell offers the possibility to manufacture the three-dimensional cell faster, cheaper and with more features, such as external or internal ribs, in order to obtain greater stiffness of the cell.

[0033] The three-dimensional unit or a portion of a three-dimensional unit can be selected from the following unit shapes: a rectangular parallelepiped, such as a cube, and having right angles between all surfaces; a rectangular parallelepiped, such as a cube, and having non-right angles between at least some of these surfaces; a prism whose at least one main surface has a polygonal cross-section, wherein the polygonal cross-section of the prism is preferably an equilateral triangle shape or an equilateral hexagon shape; a cylinder whose at least one main surface has a polygonal cross-section, wherein the polygonal cross-section of the cylinder is preferably an equilateral triangle shape or an equilateral hexagon shape; a cylinder whose at least one main surface has a circular cross-section or an elliptical cross-section.

[0034] The three-dimensional unit may be manufactured by one of the following processes: casting or molding as a full-scale modular system unit having the geometry and dimensions of the full-scale three-dimensional unit, casting or molding as a half-scale modular system unit having a geometry and dimensions that are a fraction of the full-scale three-dimensional unit.

[0035] Preferably, also under the condition that the three-dimensional unit is made of at least two parts and exhibits at least two main surfaces, the three-dimensional unit has at least one main surface capable of withstanding at least 60 kN / m in a direction perpendicular to the at least one main surface. 2 load, preferably at least 150 kN / m 2 Load, possibly at least 300kN / m 2 of load.

[0036] The cuboid according to the invention is capable of withstanding high loads. Load tests have been carried out. A test was carried out with a beam of 600 mm in length and 200 mm in width, which was placed in the middle of the top main surface of the cuboid and supplied with 117 kN / m 2 Another test was conducted with a square plate 600 mm wide along each edge, placed in the middle of the top major surface of the cuboid and supplied with 150 kN / m 2 of load.

[0037] During load tests with beams and with square plates, the downward deflection of the top major surface and / or the side surfaces was as small as 1 mm to 10 mm, possibly only 1 mm to 5 mm. Thus, the cuboid according to the invention can be installed underground with a small thickness of gravel layer between the top major surface of the cuboid and the top surface of the road, pavement or other upper surface of the ground, wherein the cuboid can still withstand the required maximum load and the cuboid can still exhibit the required minimum downward deflection of the top major surface and / or the side edges.

[0038]

[0039] The three-dimensional unit according to the present invention is preferably a full-size cuboid made of an even number of half-size parts of a cube, the full-size cuboid consisting of two substantially rectangular main surfaces parallel to each other and four side surfaces each perpendicular to the main surfaces, and the number of half-size parts of the cuboid is preferably two parts, alternatively four parts.

[0040] One or more objects of the present invention can be achieved by a three-dimensional unit, which is a full-sized cube made of at least two half-sized parts of a full-sized cube, the full-sized cube consisting of two substantially rectangular main surfaces parallel to each other and four side surfaces,

[0041] - each of the side surfaces has a common boundary between the one main surface and the respective side surface and between the respective side surface and the other adjacent side surface,

[0042] - the side surfaces extend perpendicularly from the two main surfaces and the edges between the side surfaces, and the opposite side surfaces are parallel to each other,

[0043] - at least two of the four side surfaces each have a side edge provided by connecting a free side edge of one half-sized portion of the three-dimensional cell with a free edge of another half-sized portion of the three-dimensional cell, and at least one other side surface has a portion of a through hole, the portion of the through hole preferably being a portion of a substantially full circular through hole,

[0044] - wherein the full-size three-dimensional cell provides an internal volume that allows water to be contained within the three-dimensional cell or allows water to flow through the three-dimensional cell from one through-hole in one surface to another through-hole in another surface, provided that the three-dimensional cell has at least two through-holes,

[0045] - wherein each through hole is one of a concave through hole or a convex through hole, and under the condition that the through hole is a concave through hole, the hole is used to insert a flange of the convex through hole, and under the condition that the part is one of the convex through holes, the hole has a flange for inserting into the concave through hole.

[0046] According to a particularly preferred embodiment of the three-dimensional unit, the three-dimensional unit is a half-size portion of the three-dimensional unit consisting of one substantially rectangular main surface and four side surfaces, the side surfaces extending perpendicularly from the one main surface and the edges between the side surfaces, and the opposite side surfaces being parallel to each other,

[0047] - each of the side surfaces has a common boundary between the one main surface and the respective side surface and between the respective side surface and the other adjacent side surface,

[0048] at least two of the four side surfaces each have free side edges extending opposite and parallel to a common boundary between the one main surface and each of the at least two side surfaces, and at least one other side surface has a portion of a through hole, the portion of the through hole being preferably a portion of a substantially semicircular through hole,

[0049] - wherein at least a portion of the free side edge oriented opposite to the common border between the main surface and the side surfaces is provided with means for connecting the free side edge of the half-size portion of the cuboid with the free side edge of another half-size portion of the cuboid to form a full-size cuboid, and

[0050] - wherein the portion of the through hole is one of a concave through hole or a convex through hole, and under the condition that the portion is one of the concave through holes, the portion is a hole for inserting a flange of the convex through hole, and under the condition that the portion is one of the convex through holes, the portion is a flange for inserting into the concave through hole.

[0051] Half-sized cuboids have the advantage of reducing production costs. More importantly, however, specific and selected features (such as the geometry of through holes) can be manufactured with tighter tolerances and with features that would not be possible if the cuboids were manufactured starting with full-size forming. In addition, during transportation and storage, half-sized cuboids can be stacked in a manner that reduces the volume required to transport and store a certain number of cuboids.

[0052] According to a preferred embodiment of the half-size cuboid of the present invention,

[0053] - wherein the length L1 of two opposite first parallel side surfaces in a direction parallel to the main surface and the length L2 of two further second parallel side surfaces in a direction parallel to the main surface are the same, the half-size portion of the cuboid thus having a substantially square main surface, and

[0054] - wherein the extension L3 of the side surfaces in a direction perpendicular to the main surface is substantially half of the extension of the side surfaces in a direction parallel to the main surface, the half-sized portion of the cuboid thereby substantially forming a half-sized portion of a cube shape.

[0055] When two half-sized cuboids are assembled to form a full-sized cuboid, the half-sized cuboid as a half-cube provides a full-sized cuboid as a cube. The cubic full-sized cuboids can be assembled more easily with each other because of the possible orientation of the two main surfaces and the four side surfaces in any of six directions, depending on the layout of the through holes in the cube. Stacking multiple cuboids can also be easier.

[0056] The object of the present invention can also be achieved by a full-size cuboid, wherein the length L1 of two opposite first parallel side surfaces in a direction parallel to the main surface and the length L2 of two other second parallel side surfaces in a direction parallel to the main surface are the same, and the half-size portion of the cuboid thus has a substantially square main surface, and

[0057] - wherein the extension L3 of the side surfaces in a direction perpendicular to the main surface is substantially identical to the extension of the side surfaces parallel to the main surfaces, the half-sized portion of the cuboid component thereby forming a full-sized cuboid having a substantially cubic shape.

[0058] Cubes Full-size cuboids can be assembled more easily with each other because of the possible orientation of the two main surfaces and the four side surfaces in any of six directions, depending on the type of cuboid and the layout of the through holes in the cube. Stacking multiple cuboids can also be easier when all the cuboids are cubes.

[0059] According to a preferred embodiment of the three-dimensional unit according to the invention, also under the condition that the three-dimensional unit is made of at least two parts and exhibits at least two main surfaces, at least one main surface is capable of withstanding at least 60 kN / m in a direction perpendicular to the at least one main surface. 2 load, preferably at least 150 kN / m 2 Load, possibly at least 300kN / m 2 of load.

[0060] Able to withstand at least 60kN / m 2 Or even 150kN / m 2 Or even 300kN / m 2 The loaded cube provides the possibility of positioning the cube underground, wherein the distance between the uppermost main surface of the uppermost cuboid of the stack of cuboids constituting the underground rainwater detention tank and the ground level at the site where the underground rainwater detention tank is located is reduced. The reduced distance is less than 80 cm, which is the distance often used for prior art cubes.

[0061] The reduced distance may even be less than 60 cm, or even less than 40 cm.

[0062] The distance between the uppermost major surface of the uppermost cuboid and ground level depends on the traffic load or other load above the underground stormwater detention pond. The greater the load, the greater the distance between the uppermost major surface of the uppermost cuboid and ground level will generally need to be.

[0063] According to a preferred embodiment of the three-dimensional unit according to the present invention, the three-dimensional unit is capable of withstanding at least 120,000 N / m within the volume of the unit when all through holes and any other openings are closed so that any fluid within the internal volume of the three-dimensional unit cannot escape from the unit. 2 , possibly at least 130000N / m 2 , maybe even at least 140000N / m 2 , and may even be greater than 140000N / m 2 pressure.

[0064] Rectangular blocks capable of withstanding an internal pressure of at least 1.2 bar, or even at least 1.3 bar, or even at least 1.4 bar, or even greater than 1.4 bar, ensure that when positioned underground, the blocks are able to retain any rainwater within them, and that this rainwater will be retained within them for an extended period of time. Ensuring that rainwater is retained within the blocks for an extended period of time reduces or even eliminates the risk of rainwater seeping out of the blocks.

[0065] The utility of an underground stormwater detention pond and the management of stormwater collected, detained and potentially stored in the underground stormwater detention pond may be enhanced by providing additional sections to be used with the cuboid.

[0066] A possible additional part is a sealing insert for insertion into the full-size cuboid.

[0067] the sealing insert has a rib extending outwardly relative to a central axis of the sealing insert and defining a closed annular outer circumference of the sealing insert, and

[0068] the sealing insert has at least one flange extending in the direction of the central axis and defining a closed annular inner circumference of the sealing insert, and

[0069] the flange is intended to be inserted into a through hole of the cuboid of the modular system and the inner circumference of the sealing insert is smaller than the inner circumference of the through hole into which the sealing insert is intended to be inserted,

[0070] - and the flange has a recess intended to occupy the inner circumference of an annular seal intended to seal between the flange of the sealing insert and the through-hole into which the sealing insert is intended to be inserted.

[0071] The sealing insert has the advantage that positioning, installing and retaining the seal in place between adjacent cuboids provides a secure way of providing a watertight connection between adjacent cuboids and ensuring that connection over time.

[0072] The dimensions of the seal to be used with the sealing insert according to the invention (e.g. the diameter of a circular seal) can vary depending on the dimensions of the three-dimensional cell and / or on the amount of water and / or on the required water flow velocity in the underground stormwater detention tank when conveying rainwater.

[0073] Preferably, standard size seals are used which correspond to standard size pipes already used to carry water underground, not only storm water, but also water supply and sewage. Standard size pipes may be pipes with a sealed connection for use with seals of standard size diameters, which may be 110 mm, 160 mm, 200 mm, 250 mm, 315 mm or 425 mm. In the alternative, special size seals corresponding to special size pipes may be used.

[0074] Even in the alternative, a seal with a diameter of 500 mm and capable of withstanding a pressure of at least 2.5 bar may be used to allow as much water as possible to flow through the three-dimensional unit according to the invention and to be transported along the underwater module system according to the invention.

[0075] Another possible additional part is a cover for insertion into the full-size cuboid.

[0076] the cover has a rib extending outwardly relative to a central axis of the cover and defining a closed annular outer circumference of the cover, and

[0077] the cover has at least one first flange extending in the direction of the central axis and defining a closed annular inner circumference of the cover, and

[0078] the flange is intended to be inserted into a through hole of the cuboid of the modular system and the inner circumference of the cover is smaller than the inner circumference of the through hole that the cover insert is intended to cover,

[0079] - and the flange has a recess intended to occupy the inner circumference of an annular seal intended to seal between the flange of the cover and the through-hole that the cover is intended to cover.

[0080] The cover has the advantage that a cuboid located in a stack of a plurality of cuboids and positioned at the top, side or bottom of the cuboid stack can be closed from the outside of the cuboid even if the cuboid is a cuboid of the second type.

[0081] Another possible addition is a grille for insertion into the full-size cuboid.

[0082] - the grille has ribs extending outwardly relative to a central axis of the grille and defining a closed annular outer circumference of the grille, and

[0083] the grille has at least one flange extending in the direction of the central axis and defining a closed annular inner circumference of the grille, and

[0084] the flange is intended to be inserted into a through hole of the cuboid of the modular system and the inner circumference of the grille is smaller than the inner circumference of the through hole into which it is intended to be inserted,

[0085] - and the flange has a recess intended to occupy the inner circumference of an annular seal intended to seal between the flange of the grille and the through-hole into which the grille is intended to be inserted.

[0086] The grid has the following advantage: even if the cuboids are the second type cuboids, the cuboids located in a stack of multiple cuboids and positioned at the top, side or bottom of the cuboid stack can prevent debris from outside from flowing to the cuboids from the outside or passing between adjacent cuboids.

[0087] Another possible addition is a shroud to be inserted into the full-size cuboid.

[0088] the shroud has a rib extending outwardly relative to a central axis of the shroud and defining a closed annular outer circumference of the shroud, and

[0089] the shield has at least one flange extending in the direction of the central axis and defining a closed annular inner circumference of the shield, and

[0090] the flange is intended to be inserted into a through hole of the cuboid of the modular system and the inner circumference of the shield is smaller than the inner circumference of the through hole into which it is intended to be inserted,

[0091] - and the flange has a recess intended to occupy the inner circumference of an annular seal intended to seal between the flange of the shield and the through-hole into which the shield is intended to be inserted,

[0092] - the shroud has side rails for guiding and holding one of the grilles or screens, the side rails extending perpendicularly to the central axis of the shroud, and

[0093] The shield comprises an insert chosen from a grille or a screen, each insert having side edges for insertion in the side rails and intended to partially or completely close the opening through the shield.

[0094] The shield has the following advantages: it can prevent, allow, or partially allow and / or prevent debris and / or water from passing between adjacent cuboids.

[0095] Another possible addition is a barrel insert to be inserted into the full-size cuboid,

[0096] - the barrel insert has a support surface extending outwardly relative to and perpendicular to a central axis of the barrel insert and defining an outer circumference of the barrel insert, and

[0097] - the barrel insert has a flange extending in the direction of the central axis and defining a closed annular circumference of the barrel insert and intended for supporting a pipe above the barrel insert, and

[0098] the barrel insert has a further flange extending in the direction of the central axis and defining a closed annular circumference of the barrel insert and intended for insertion into the through hole of the cuboid of the modular system, and

[0099] - The outer circumference of the further flange of the tub insert is smaller than the inner circumference of the through hole into which the further flange of the tub insert is intended to be inserted.

[0100] The barrel insert has the following advantages: by collecting debris from the ground in the rectangular barrel close to the ground, debris flowing from the ground to the module system via rainwater can be prevented from flowing to the entire module system.

[0101] Another possible addition is a wicking insert to be inserted into the full-size cuboid.

[0102] - the wicking insert has a support surface extending outwardly relative to and perpendicular to a central axis of the wicking insert and defining an outer circumference of the wicking insert, and

[0103] - the wicking insert has a flange extending in the direction of the central axis and defining a closed annular circumference of the wicking insert and intended for supporting an outer circumference of wicking material, and

[0104] the wicking insert has a further flange extending in the direction of the central axis and defining a closed annular circumference of the wicking insert and intended for insertion into the through hole of the cuboid of the modular system, and

[0105] - The outer circumference of the further flange of the wicking insert is smaller than the inner circumference of the through-hole into which the further flange of the wicking insert is intended to be inserted.

[0106] The wicking insert has the advantage that water from the cuboid close to the ground can be transferred to possible plants located above the cuboid in which the wicking insert is inserted.

[0107] Another possible part is a bottom plate which is intended to be inserted into the three-dimensional unit so as to cover the bottom of the three-dimensional unit, the bottom plate having

[0108] - a central section and side sections extending from the central section and whose outer edges constitute part of the outer boundary of the base plate,

[0109] - the side segments have grooves extending from the central segment to the outer edges of the side segments, the grooves being arranged at selected distances along the side segments,

[0110] The chosen distance of the chosen grooves corresponds to the ribs along the inner surface of the three-dimensional cell into which the base plate is intended to be inserted.

[0111] The bottom plate can cover any spaces formed between the supporting ribs of the three-dimensional cell. These spaces may unintentionally retain debris that enters the three-dimensional cell through rainwater entering or passing through the cell. The bottom plate having a center section and having grooves for interacting with the ribs covers the space and eliminates debris that is retained in the spaces formed between the ribs of the three-dimensional cell.

[0112] The objects of the present invention can also be achieved by an underground rainwater retention tank comprising a modular system part according to the present invention and an underground rainwater retention tank composed of a plurality of full-size cuboids according to the present invention, wherein the plurality of full-size cuboids are buried in the ground below the ground level of the site where the retention tank is located, a certain number of the plurality of cuboids constitute the uppermost cuboids facing the ground level, and the distance between the upper main surface of at least one of these uppermost cuboids and the ground level is less than 80 cm, preferably less than 60 cm, and more preferably less than 40 cm.

[0113] The object of the present invention can also be achieved by a method for constructing an underground rainwater detention tank, the underground rainwater detention tank comprising the module system part according to the present invention, and the underground rainwater detention tank is composed of a plurality of full-size cuboids according to the present invention, the method comprising the following steps:

[0114] - providing a plurality of full-size cuboids of the first type made from two half-size cuboids of the first type, and assembling the plurality of full-size cuboids at the site of the underground rainwater detention tank by the following assembly method:

[0115] - inserting a flange of a convex through hole at a side surface of one cuboid into a concave through hole at an opposite side surface of another adjacent cuboid so as to assemble a plurality of cuboids of the first type, and

[0116] An annular seal is provided between the outer circumference of the flange of the male through hole of the one cuboid and the inner circumference of the female through hole of another adjacent cuboid.

[0117] The object of the present invention can also be achieved by a method for constructing an underground rainwater detention tank, the underground rainwater detention tank comprising the module system part according to the present invention, and the underground rainwater detention tank is composed of a plurality of full-size cuboids according to the present invention, the method comprising the following steps:

[0118] - providing a plurality of full-size cuboids of the second type made from two half-size cuboids of the second type, and assembling the plurality of full-size cuboids at the site of the underground rainwater detention tank by the following assembly method:

[0119] - inserting one flange of the sealing insert into the concave through hole of one cuboid, and inserting the other flange of the sealing insert into the concave through hole of another adjacent cuboid, and

[0120] An annular seal is provided between the outer circumference of each of the flanges of the sealing insert and the inner circumference of the concave through-holes of the one adjacent cuboid and the other adjacent cuboid.

[0121] Furthermore, the object of the present invention can be achieved by a use of a plurality of modular system parts according to the present invention for constructing an underground rainwater retention pond consisting of a plurality of full-size cuboids according to the present invention.

[0122] The inner dimension of the through hole is at least 50%, preferably at least about 80%, relative to the outer dimension of the side surface where the through hole is provided.

[0123] The interior void volume is at least about 80%, at least about 85%, at least about 90%, preferably at least 95% relative to the exterior volume of the full-size cuboid.

[0124] The volume of the interior of the three-dimensional unit for the modular part according to the invention is preferably at least 100 liters, possibly at least 200 liters, possibly between 200 liters and 400 liters. For example, the three-dimensional unit for the modular part may be a cube with a side edge length of about 60 cm, resulting in an interior volume of about 200 liters. If the interior volume of the modular part is much larger than 400 liters, the modular part may become too large and may be heavy, making the modular part difficult to handle, at least difficult to handle manually. BRIEF DESCRIPTION OF THE DRAWINGS

[0125] Figure 1 is a diagram of a modular system of underground rainwater detention tanks.

[0126] Figure 2 is an illustration of a half-size cuboid for a full-size cuboid of the first type,

[0127] Figure 3A and Figure 3B is an illustration of a full-size cuboid of the first type,

[0128] Figure 4 is a diagram of adjacent cuboids of the first type attached to each other,

[0129] Figure 5 is an illustration of a half-size cuboid for a full-size cuboid of the second type,

[0130] Figure 6 is an illustration of a full-size cuboid of the second type,

[0131] Fig. 7A and Figure 7B is a diagram of a preferred half-sized first type cuboid

[0132] Fig. 8A and Figure 8B is a diagram of the main surface separated from the side surface

[0133] Fig. 9A and Fig. 9B This is a possible half-sized second type cuboid illustration.

[0134] Fig.10 is a diagram of an embodiment of a preferred half-size type cuboid

[0135] Fig.11 is a diagram of another embodiment of a preferred half-size type cuboid

[0136] Fig. 12A and Fig. 12B is a diagram of a longitudinal seal for a rectangular parallelepiped,

[0137] Fig.13 is an illustration of one embodiment of a sealing insert for two adjacent cuboids,

[0138] Fig.14 is an illustration of another embodiment of a sealing insert for a single cube,

[0139] Fig.15 is an illustration of yet another embodiment of a sealing insert for adjacent cuboids,

[0140] Fig.16 is an illustration of an embodiment of a sealing insert and a grille inserted therein,

[0141] Fig.17 is a diagram of another embodiment of a sealing insert and a grille inserted therein,

[0142] Fig.18 is a diagram of a cover for a concave through hole in a rectangular parallelepiped.

[0143] Fig.19is an illustration of another cover for a concave through hole in a rectangular parallelepiped,

[0144] Fig. 20A and Fig. 20B is a diagram of another cover for a concave through hole of a rectangular parallelepiped. Fig.21A and Fig.21B is a diagram of yet another cover for a concave through hole of a rectangular parallelepiped,

[0145] Fig. 22 is a diagram of yet another embodiment of a sealing insert for a rectangular parallelepiped,

[0146] Fig.23 is an illustration of a grille insert for yet another embodiment of a sealing insert,

[0147] Fig.24 is an illustration of a screen insert for yet another embodiment of a sealing insert,

[0148] Fig.25 is an illustration of a barrel insert and a wicking insert for a modular system,

[0149] Fig.26A and Fig.26B is a diagram of an embodiment of a cover having a support ring,

[0150] Fig.27A and Fig.27B is a diagram of another embodiment of a cover having a support ring,

[0151] Fig.28 and Fig.29 is a diagram of one embodiment of a support ring and a barrel,

[0152] Fig.30 and Fig.31 is a diagram of another embodiment of a support ring and a barrel,

[0153] Fig.32A and Fig.32B is an illustration of a corner lock for the corners of adjacent cuboids.

[0154] Fig.33 is a diagram of a device for preventing the module system from shifting,

[0155] Fig.34 is an illustration of a side lock for locking the corners of adjacent cuboids, and

[0156] Fig.35 is an illustration of a base plate for insertion into a full-size or half-size cuboid.

[0157] FIG. 36A to FIG. 36C is an illustration of a locking member for locking together half-size sections of a cuboid,

[0158] Fig.37 is an illustration of another modular system for underground stormwater detention tanks. DETAILED DESCRIPTION

[0159] Figure 1 An example of a modular system of an underground rainwater detention tank is shown. The layout includes six full-size cuboids, however, the one in the center of the rainwater detention tank is barely visible. The outermost cuboid on the left and the one between the center cuboid and the outermost cuboid on the right are composed of half-size cuboids 1 of the first type (see Figure 3A and Figure 3B The remaining four cuboids located at the center, top, bottom and right outermost are made of the second type of half-size cuboids 21 (see Figure 5 and Figure 6 ) is made.

[0160] In the cuboid embodiment shown, all cuboids are substantially shaped as cubes, i.e., all six surfaces of the cuboid have substantially the same size. In alternative embodiments of the cuboids, the cuboids can be shaped as non-cubic cuboids, i.e., the two end surfaces have the same size and the four side surfaces have the same size, however, the four side surfaces are not the same size as the two end surfaces.

[0161] The central cuboid is provided with a sealing insert (see FIG8 ) which establishes a connection between the through hole in the top side surface of the central cuboid and the through hole in the bottom side surface of the uppermost cuboid. The cuboid located at the bottom is provided with a cover in the through hole in the bottom side surface of the cuboid (see FIG12 ). The outermost cuboid located on the right is provided with a sealing insert and a grille in the through hole in the lateral side surface of the cuboid (see FIG13 ). Fig.11 ).

[0162] Figure 2 A half-size cuboid of the first type 1 is shown (see Figure 1 , Figure 3A , Figure 3B and Figure 4 ). In the embodiment shown, the half-size cuboid has a main surface 2 and four side surfaces 3, 4, 5, 6 extending from a common boundary 7 between the main surface 2 and the side surfaces 3, 4, 5, 6. In the embodiment shown, two opposing side surfaces 3, 4 have half-size through holes 8, 9 in the shape of a semicircle. The other two opposing side surfaces 5, 6 are closed. The main surface 2 is closed.

[0163] One side surface 3 has a half-sized through hole 8 which is intended to form a corresponding convex through hole (see Figure 3A) engages a full-size recessed through hole (see Figure 3B ) part.

[0164] The half-sized female through hole 8 has a support flange 10 extending along the circumference of the half-sized through hole 8. The support flange 10 is intended to limit the axial extension of an annular seal (not shown) intended to seal against the inner circumference of the female through hole 8 and against the outer circumference of the male through hole of the other cuboid when the female through hole of one cuboid engages with the male through hole of the adjacent cuboid.

[0165] The other side surface 4 has a half-size through hole 9, which constitutes a corresponding concave through hole (see Figure 3A ) engages a full-size male through hole (see Figure 3A ) part.

[0166] The half-sized male through-hole 9 has a flange 11 which is intended to be inserted into the half-sized female through-hole 8 of an adjacent rectangular parallelepiped (not shown). The flange 11 has a recess 12. The recess 12 is intended to hold an annular seal (not shown) which is intended to seal against the outer circumference of the recess 12 and against the inner circumference of the female through-hole of the adjacent rectangular parallelepiped when the male through-hole of one rectangular parallelepiped is engaged with the female through-hole of another rectangular parallelepiped.

[0167] Protrusions 13 are provided at selected two corner positions of the side surfaces 3, 4, 5. The protrusions 13 are intended to engage with corresponding recesses at selected other corner positions of the side surface of an opposing half-size cuboid (not shown) attached to one of the half-size cuboids shown to form a full-size cuboid.

[0168] Recesses 14 are provided at selected corners of the side surfaces 3, 4, 6. The recesses 14 are intended to engage with corresponding protrusions at selected corners of the side surface of an opposing half-size cuboid (not shown) attached to one of the half-size cuboids shown to form a full-size cuboid.

[0169] The engagement between the protrusion 13 and the recess 14 holds the two half-size cuboids in position relative to each other to form a full-size cuboid (see Figure 3A , Figure 3B ).

[0170] A longitudinal bead 15 is provided along the free side edge of one closed side surface 5. A longitudinal groove 16 is provided along the free side edge of the other closed side surface 6, opposite to the one closed side surface 5 having the bead 15. The longitudinal bead 15 and the longitudinal groove 16 are intended to engage with corresponding grooves and bead, respectively, along the free side edge of the side surface of another half-size cuboid (not shown) that together with the shown half-size cuboid forms a full-size cuboid.

[0171] An elastic lining (not shown) such as rubber or other water-impermeable elastomer may be provided in the groove 16. If the mutual engagement between the convex circle 15 and the groove 16 along the free edges of the illustrated half-sized cuboid and the other half-sized cuboid (not shown) that together form the full-sized cuboid is not water-tight, the mutual engagement between the illustrated free side edges of the half-sized cuboid and the other cuboid may be made water-tight if an elastic lining is provided in the groove 16 of the cuboid.

[0172] The first type of half-size cuboid may be made of plastic (such as polypropylene (PP)), preferably with fibers, such as glass fibers, preferably embedded in the plastic, with a length preferably between 0.1 mm and 10 mm. The thickness of the main surface and the side surface is preferably between 2 mm and 10 mm, preferably between 2 mm and 5 mm. The length L1 of a pair of opposite side edges of the main surface may be between 400 mm and 1000 mm. The length L2 of a pair of opposite side edges of the main surface may be between 400 mm and 1000 mm. The length L3 of the side surface in a direction perpendicular to the main surface is preferably between 200 mm and 500 mm. The half-size cuboid may have a volume within the main surface, the inner side of the side surface including possible through-hole expansion at 0.6m 3 With 2m 3 Between, preferably 0.5m 3 With 1m 3 The plane area between.

[0173] Figure 3A and Figure 3B Shown by Figure 2 The full-size cuboid of the first type of cuboid is made of two half-size cuboids shown. The full-size cuboid has two main surfaces 2, two opposite side surfaces 3, 4 each having a substantially circular through hole 8, 9, and two opposite side surfaces 5, 6 each being closed. One side surface 3 has a concave through hole 8, and the other side surface 4 has a convex through hole 9.

[0174] The full-size first type cube is intended as a water pipe module and / or water detention module and / or water regulation module of a modular system of rainwater retention tanks. In the embodiment shown, at least the side surfaces 3, 4, 5, 6 are made into a sandwich structure. Each side surface is composed of relative panels 17, 18 connected to each other by supporting ribs 19. Thus, when a cuboid together with other cuboids constitutes a modular system of rainwater retention tanks, the stiffness of the main surface and the side surface is increased, and it is better able to withstand the load from the ground and from possible other cuboids located above one cuboid.

[0175] A locking recess 20 is provided at each corner of the cuboid. The locking recess 20 is intended to engage with a locking pin of a corner locking portion (see Fig.25 ).

[0176] Figure 4 The adjacent first type cuboids are shown attached to each other. The convex through hole 9 of the left cuboid (see Figure 3A ) and the concave through hole 8 of the rectangular parallelepiped on the right (see Figure 3B ) is joined. On the outer circumference of the recessed portion 12 of the flange 11 (see Figure 3A ) and the inner circumference of the concave through hole 8 (see Figure 3A ) is positioned between the annular seal (not shown).

[0177] The inner circumference of the annular seal is sealed against the outer circumference of the recess, and the outer circumference of the annular seal is sealed against the inner circumference of the concave through hole. Thus, the mutual engagement between the flange of the convex through hole and the concave through hole is made watertight.

[0178] Figure 5 A half-size cuboid for a second type 21 is shown (see Figure 1 and Figure 6 ). In the embodiment shown, the half-size cuboid has a main surface 22 and four side surfaces 23, 24, 25, 26 extending from an edge 27 of the main surface 22. In the embodiment shown, all side surfaces 23, 24, 25, 26 have a half-size through hole 28 in the shape of a semicircle. The main surface 22 has a full-size through hole 29.

[0179] The half-sized through-holes 28 in the side surfaces 23, 24, 25, 26 are intended to form corresponding convex through-holes for connecting with adjacent rectangular parallelepiped bodies (not shown) (see Figure 3A ) engages a full-size recessed through hole (see Figure 3B ). The full-size through hole 29 in the major surface 22 is used to mate with a corresponding convex through hole (see Figure 3A ) join.

[0180] The half-size female through-hole 28 and the full-size female through-hole 29 have a support flange 30 extending along the circumference of the through-hole 28, 29. The support flange 30 is intended to limit the axial extension of an annular seal (not shown) for sealing against the inner circumference of the female through-hole 28, 29 and against the outer circumference of the male through-hole of the other cuboid when the female through-hole of one cuboid engages with the male through-hole of the adjacent cuboid.

[0181] Protrusions 33 are provided at selected corner locations of side surfaces 23, 24, 25. Protrusions 33 are intended to engage with corresponding recesses at selected other corner locations of the side surface of an opposing half-size cuboid (not shown) attached to one half-size cuboid shown to form a full-size cuboid.

[0182] Recesses 14 are provided at selected corners of side surfaces 23, 24, 26. Recesses 14 are intended to engage corresponding protrusions 13 at selected corners of side surfaces of an opposing half-size cuboid (not shown) that will mate with one half-size cuboid shown to form a full-size cuboid.

[0183] The engagement between the protrusion 13 and the recess 14 holds the two half-size cuboids in position relative to each other to form a full-size cuboid (see Figure 6 ).

[0184] The first type of half-size cuboid may be made of plastic, such as PP, preferably with fibers embedded in the PP, such as glass fibers. The thickness of the main surface and the side surface is preferably between 2mm and 10mm, preferably between 2mm and 5mm. The length L1 of a pair of opposite side edges of the main surface may be between 400mm and 1000mm. The length L2 of a pair of opposite side edges of the main surface may be between 400mm and 1000mm. The length L3 of the side surface in a direction perpendicular to the main surface is preferably between 200mm and 500mm. The half-size cuboid may have a volume within the main surface, the inner side of the side surface including possible through-hole expansion at 0.6m 3 With 2m 3 Between, preferably 0.5m 3 With 1m 3 The plane area between.

[0185] Figure 6 Shown by Figure 4 The full-size cuboid of the second type is made of two half-size cuboids shown. The full-size cuboid has two opposite main surfaces 22 each having a substantially circular through hole 29, and four side surfaces 23, 24, 25, 26 each having a substantially circular through hole 28. In this figure, one through hole of one side surface 25 is closed by a cover (see FIG. Fig.15), and another through hole of the other side surface 24 is partially closed by a sealing ring with a shield (see Fig.16 ).

[0186] This full-size second type cube is intended as a water pipe and / or water detention module for a modular stormwater management system. In the embodiment shown, at least the side surfaces 23, 24, 25, 26 are made as a sandwich structure. Each surface is composed of opposing panels 32, 338 interconnected by supporting ribs 34.

[0187] Therefore, when a cuboid forms a modular stormwater management system together with other cuboids, the stiffness of at least the side surfaces 23, 24, 25, 26 and possibly the main surface 22 will be increased, and can better withstand the loads from the ground and from possible other cuboids located above the cuboid.

[0188] A locking recess 35 is provided at each corner of the cuboid. The locking recess 35 is intended to engage with at least one locking pin of a corner locking portion (see Fig.24 ).

[0189] Fig. 7A and Figure 7B A preferred embodiment of a half-sized cuboid for a cuboid of the first type 1 is shown. In the embodiment shown, the half-sized cuboid has a main surface 2 and four side surfaces 3, 4, 5, 6 extending from a common boundary 7 between the main surface 2 and the side surfaces 3, 4, 5, 6. In the embodiment shown, two opposing side surfaces 3, 4 have half-sized through holes 8, 9 in the shape of a semicircle. The other two opposing side surfaces 5, 6 are closed. The main surface 2 is closed.

[0190] One side surface 3 has a half-sized through hole 8, which is intended to constitute a part of a full-sized male through hole capable of engaging with a corresponding male through hole of an adjacent rectangular parallelepiped (not shown). The other side surface 4 has a half-sized through hole 9, which constitutes a part of a full-sized female through hole capable of engaging with a corresponding female through hole of an adjacent rectangular parallelepiped (not shown).

[0191] Fig. 8A and Figure 8B The preferred embodiment shown has a number of specially manufactured integrated profiles, such as internal and external ribs, to increase the rigidity of the cuboid. The possibility of manufacturing ribs, especially internal ribs and in the case of injection molded plastic and depending on the need for the load bearing capacity of the cuboid, is enhanced by manufacturing two half-size cuboids in the form of a cuboid.

[0192] Fig. 8A and Figure 8BA preferred embodiment of a half-size cuboid for a cuboid of the second type 21 is shown. In the embodiment shown, the half-size cuboid has a main surface 22 and four side surfaces 23, 24, 25, 26 extending from an edge 27 of the main surface 22. In the embodiment shown, all side surfaces 23, 24, 25, 26 have a half-size through hole 28 in the shape of a semicircle. The main surface 22 has a full-size through hole 29.

[0193] The half-sized through holes 28 in the side surfaces 23, 24, 25, 26 are intended to form part of a full-sized female through hole for engaging with a corresponding male through hole in an adjacent cuboid (not shown). The full-sized through hole 29 in the main surface 22 is intended to engage with a corresponding male through hole in an adjacent cuboid (not shown).

[0194] Fig. 9A and Fig. 9B A possible embodiment of a cuboid is shown. Figure 6 The main surface 2 of the cuboid shown is provided with a main surface constituting a portion 2A separated from the side surface. The main surface 2A is provided with tenons 35A, which are intended to be positioned in a position such as Figure 6 In the corresponding recess 35 of the cuboid shown. In addition, Fig. 8A and Figure 8B The main surface 2A shown is provided with ribs for increasing the rigidity and thereby the strength of the main surface 2A.

[0195] In addition, when the main surface is a separate part from the side surface, the possibility of manufacturing the main surface with the required rigidity and strength is enhanced. Especially for a cuboid intended to be the uppermost cuboid in a module system from an underground rainwater retention tank, it is susceptible to the largest load from traffic on the ground. The cuboid as the uppermost cuboid may preferably be manufactured to have the main surface 2A separated from the side surface, so as to provide the main surface 2A with the maximum rigidity and strength against the load on the ground.

[0196] Fig. 8A and Figure 8B The main surface portion 2a shown can also be provided for example Figure 6 The cuboids shown in other figures can also be modified so that the main surface is a part separated from the main surface. In addition, the separate part of the main surface 2A can be provided with a through hole so that the other parts (see Figures 19 to 23 ) can be inserted into a separate partial main surface 2A.

[0197] Fig. 9A and Fig. 9BThe preferred embodiment shown has a number of specially manufactured integrated profiles, such as internal and external ribs, to increase the rigidity of the cuboid. The possibility of manufacturing ribs, especially internal ribs and in the case of injection molded plastic and depending on the need for the load bearing capacity of the cuboid, is enhanced by manufacturing two half-size cuboids in the form of a cuboid.

[0198] Fig.10 A preferred embodiment of a rectangular parallelepiped is shown. Figure 6 The main surface 2 of the cuboid shown is provided with a main surface constituting a portion 2A separated from the side surfaces. The main surface 2A is provided with tenons 35A intended to be positioned in corresponding recesses 35 of the cuboid as shown in the figure.

[0199] also, Fig. 8A and Figure 8B The main surface 2A shown is provided with ribs for increasing the rigidity and thereby the strength of the main surface 2A.

[0200] In addition, when the main surface is a separate part from the side surface, the possibility of manufacturing the main surface with the required rigidity and strength is enhanced. Especially for a cuboid intended to be the uppermost cuboid in a module system from an underground rainwater retention tank, it is susceptible to the largest load from traffic on the ground. The cuboid as the uppermost cuboid may preferably be manufactured to have the main surface 2A separated from the side surface, so as to provide the main surface 2A with the maximum rigidity and strength against the load on the ground.

[0201] Fig.10 The preferred embodiment shown has a number of specially manufactured integrated profiles, such as internal and external ribs, to increase the rigidity of the cuboid. The possibility of manufacturing ribs, especially internal ribs and in the case of injection molded plastic and depending on the need for the load bearing capacity of the cuboid, is enhanced by manufacturing two half-size cuboids in the form of a cuboid.

[0202] Fig.11 A preferred embodiment of a half-sized cuboid for a cuboid of the first type 1 is shown. In the embodiment shown, the half-sized cuboid has a main surface 2 and four side surfaces 3, 4, 5, 6 extending from a common boundary 7 between the main surface 2 and the side surfaces 3, 4, 5, 6. In the embodiment shown, two opposing side surfaces 3, 4 have half-sized through holes 8, 9 in the shape of a semicircle. The other two opposing side surfaces 5, 6 are closed. The main surface 2 is closed.

[0203] One side surface 3 has a half-sized through hole 8, which is intended to constitute a part of a full-sized male through hole capable of engaging with a corresponding male through hole of an adjacent rectangular parallelepiped (not shown). The other side surface 4 has a half-sized through hole 9, which constitutes a part of a full-sized female through hole capable of engaging with a corresponding female through hole of an adjacent rectangular parallelepiped (not shown).

[0204] Fig. 8A and Figure 8B The preferred embodiment shown has a number of specially manufactured integrated profiles, such as internal and external ribs, to increase the rigidity of the cuboid. The possibility of manufacturing ribs, especially internal ribs and in the case of injection molded plastic and depending on the need for the load bearing capacity of the cuboid, is enhanced by manufacturing two half-size cuboids in the form of a cuboid.

[0205] Fig.11 A possible embodiment of a cuboid is shown. Figure 6 The main surface 2 of the cuboid shown is provided with a main surface constituting a portion 2A separated from the side surface. The main surface 2A is provided with tenons 35A, which are intended to be positioned in a position such as Figure 6 In the corresponding recess 35 of the cuboid shown.

[0206] also, Fig. 8A and Figure 8B The main surface 2A shown is provided with ribs for increasing the rigidity and thereby the strength of the main surface 2A.

[0207] In addition, when the main surface is a separate part from the side surface, the possibility of manufacturing the main surface with the required rigidity and strength is enhanced. Especially for a cuboid intended to be the uppermost cuboid in a module system from an underground rainwater retention tank, it is susceptible to the largest load from traffic on the ground. The cuboid as the uppermost cuboid may preferably be manufactured to have the main surface 2A separated from the side surface, so as to provide the main surface 2A with the maximum rigidity and strength against the load on the ground.

[0208] Fig. 8A and Figure 8B The main surface portion 2a shown can also be provided for example Figure 6 The cuboids shown in other figures can also be modified so that the main surface is a part separated from the main surface. In addition, the separate part of the main surface 2A can be provided with a through hole so that the other parts (see Figures 19 to 23 ) can be inserted into a separate partial main surface 2A.

[0209] Fig. 9A and Fig. 9BThe preferred embodiment shown has a number of specially manufactured integrated profiles, such as internal and external ribs, to increase the rigidity of the cuboid. The possibility of manufacturing ribs, especially internal ribs and in the case of injection molded plastic and depending on the need for the load bearing capacity of the cuboid, is enhanced by manufacturing two half-size cuboids in the form of a cuboid.

[0210] In all the embodiments of the cuboid shown, any ribs providing increased stiffness of the cuboid have the same thickness along the entire extension of the rib. However, in alternative embodiments of the ribs, some of the ribs may be thicker than other of the ribs, depending on the position within the cuboid and on any requirements for increased stiffness of the cuboid at some locations relative to others.

[0211] Each of the ribs or some of the ribs may have an increased thickness at the base of the rib near the position where the rib extends from the main surface or the side surface compared to the tip of the rib far from the position where the rib extends from the main surface or the side surface, the rigidity provided by such ribs may also be higher than that of ribs having the same thickness at the base and at the tip, and possibly, when a rectangular parallelepiped is manufactured by injection molding, if the rib has a shape in which the base of the rib has a greater thickness than the tip of the rib, it may be easier to remove the rectangular parallelepiped from the mold.

[0212] Fig. 12A and Fig. 12B A possible embodiment of a longitudinal seal 36 for a first type of cube is shown, which is used to seal the convex part 15 and the concave part 16 of the two half-sized first type cubes when they are joined to each other along the free edge to form a full-sized first type cube (see Figure 2 ) to provide a watertight seal between.

[0213] The seal has a middle linear section 37 for insertion into the middle portion of the recess 16 of a half-sized first type cube (see Figure 2 ). One end of the seal ( Fig.10 A. Fig.10 B) has an end section 38 whose geometry corresponds to a portion of the recess 16 extending along the concave through hole 8 of the half-sized first type cube (see Figure 2 ). The other end of the seal ( Fig.10 A, 10B) has another end section 39, the geometry of which corresponds to a portion of the recess 16 extending along the convex through hole 9 of the first type of half-size cuboid (see Figure 2 ).

[0214] By providing end sections 38, 39 of the seal corresponding to the shape of the portion of the recess along the concave and convex through holes of the first type of cube, a seal made of two half-sized cubes connected to each other and having a shape such as Fig.10 B. Fig.10 The full-size cube of the seal shown in B is watertight along the entire extension of the convex circle 15 and the concave part 16 of the first type of cube.

[0215] An annular seal (not shown) disposed between the outer circumference of the male flange and the inner circumference of the female flange of two adjacent cuboids connected to each other makes the connection of the flanges watertight. Fig.25 A and Fig.25 Together with the seal shown in B, the half-sized first type cuboids are connected to each other and the connection between the full-sized first type cuboids is made watertight. Thus, the modular system can regulate and store water for a longer period of time.

[0216] Fig.13 An embodiment of a sealing insert 40 is shown for providing a connection between concave through-holes of adjacent cuboids of a second type. Ribs 41 extend circumferentially along the sealing insert 40 and radially outward relative to a central axis A of the sealing insert 40. The ribs 41 provide a stopper that limits the insertion of the sealing insert 40 into the concave through-holes of adjacent second type cuboids.

[0217] The male flange 42 extends circumferentially along the sealing insert 40 on each side of the rib 41 and in the longitudinal direction of the central axis A of the sealing insert 40. The flange 42 is dimensioned so that when the sealing insert 40 is engaged with the female through-hole of an adjacent second type cube, the flange 42 extends into the female through-hole by a distance, preferably between 10 mm and 50 mm.

[0218] The outer diameter of the male flange 42 is preferably 500 mm, which is the same diameter as the outer diameter of one of a plurality of standard size drain pipes. Another diameter of the male flange 42 may be selected, which may be the same diameter as the outer diameter of another of a plurality of standard size drain pipes.

[0219] Each of the flanges 42 has a recess 43. Each of the recesses 43 is intended to hold an annular seal (not shown) for sealing against the outer circumference of one of the recesses 43 and against the inner circumference of the rectangular concave through hole when the flange 42 is engaged with the rectangular concave through hole.

[0220] Fig. 12 shows another embodiment of a sealing insert 44 for insertion into a concave through hole of either the first type cuboid or the second type cuboid. End ribs 45 extend circumferentially along the sealing insert 44 and radially outward relative to the center axis A of the sealing insert 44. The end ribs 45 provide a stopper that limits the insertion of the sealing insert 44 into the concave through hole of the cuboid.

[0221] The male flange 46 extends circumferentially along the sealing insert 44 on one side of the end rib 45 and in the longitudinal direction of the central axis A of the sealing insert 50. The flange 46 is sized so that when the flange 46 engages with the rectangular female through hole, the flange of the sealing insert 44 extends into the female through hole by a certain distance, preferably between 10 mm and 50 mm.

[0222] The flange has a recess 47. The recess 47 is intended to hold an annular seal (not shown) for sealing against the outer circumference of the recess 47 and against the inner circumference of the rectangular female through hole when the flange 46 engages with the rectangular female through hole.

[0223] Fig.15 One embodiment of a sealing insert 40 is shown for providing a connection between concave through-holes of adjacent cuboids of a second type. Ribs 41 extend circumferentially along the sealing insert 40 and radially outward relative to a central axis A of the sealing insert 40. The ribs 41 provide a stopper that limits the insertion of the sealing insert 40 into the concave through-holes of adjacent second type cuboids.

[0224] The male flange 42 extends circumferentially along the sealing insert 40 on each side of the rib 41 and in the longitudinal direction of the central axis A of the sealing insert 40. The flange 42 is dimensioned so that when the sealing insert 40 is engaged with the female through-hole of an adjacent second type cube, the flange 42 extends into the female through-hole by a distance, preferably between 10 mm and 50 mm.

[0225] Each of the flanges 42 has a recess 43. Each of the recesses 43 is intended to hold an annular seal (not shown) for sealing against the outer circumference of one of the recesses 43 and against the inner circumference of the rectangular concave through hole when the flange 42 is engaged with the rectangular concave through hole.

[0226] The outer diameter of the male flange 42 is preferably 500 mm, which is the same diameter as the outer diameter of one of a plurality of standard size drain pipes. Another diameter of the male flange 42 may be selected, which may be the same diameter as the outer diameter of another of a plurality of standard size drain pipes.

[0227] Fig.15 The illustrated insert 44 is closed so that water and all other materials in one cuboid into which the sealing insert 44 is inserted are prevented from passing to an adjacent cuboid into which the sealing insert 44 is also inserted, and vice versa.

[0228] Fig.15 The insert 44 shown can be used during construction of the modular system to cut off one part of the modular system from another part of the modular system, either to cut off one part on one level of the system from another part on the same level of the system, or to cut off one part on one level of the system from another part on a lower or higher level of the system.

[0229] Fig.16 Shown as Fig.11 The sealing insert 40 is shown, and wherein a grid 48 is inserted into the sealing insert 40. Water flowing from one cuboid to another adjacent cuboid interconnected by the sealing insert 40 must pass through the grid 48. The grid 48 can be a mechanical grid, a grid with a biological filter, or a grid with a chemical filter, depending on the need to filter the water flowing from one cuboid to the adjacent cuboid.

[0230] Fig.17 The sealing insert 44 as shown in FIG12 is shown, and wherein a grid 48 is inserted into the sealing insert 44. Water flowing from the cuboid to the outside of the cuboid must pass through the grid 48. The grid 48 may be a mechanical grid, a grid with a biological filter, or a grid with a chemical filter, depending on the need to filter the water flowing from the cuboid to the outside.

[0231] like Fig.16 The sealing insert 44 shown with the grille 48 may be intended to allow water inside the cuboid to flow to the outside of the cube, possibly into the soil in which the modular system is buried, or to allow water outside the cuboid to enter the interior of the cuboid, perhaps from the road or pedestrian pavement above the cuboid.

[0232] like Fig.16 The sealing insert 44 shown with the grid 48 may also be intended to allow water to flow both from the inside of the cuboid to the outside of the cuboid and from the outside of the cuboid to the inside of the cuboid.

[0233] like Fig.14 The sealing insert 44 with the grid 48 shown is preferably used in the through holes of the cuboids which are positioned at the bottom surface and / or side surface of the lowest cuboid in the modular system for storm water management, where water can flow to the external environment. The external environment may be large rocks or stones, wherein the spaces between the rocks or stones are intended to retain water from one or more of the lowest cuboids of the modular structure.

[0234] Fig.18 Another embodiment of a sealing insert 40 is shown for providing a connection between concave through-holes of adjacent cuboids of a second type. Ribs 41 extend circumferentially along the sealing insert 40 and radially outward relative to the central axis A of the sealing insert 40. The ribs 41 provide a stopper that limits the insertion of the sealing insert 40 into the concave through-holes of adjacent second type cuboids.

[0235] The male flange 42 extends circumferentially along the sealing insert 40 on each side of the rib 41 and in the longitudinal direction of the central axis A of the sealing insert 40. The flange 42 is dimensioned so that when the sealing insert 40 is engaged with the female through-hole of an adjacent second type cube, the flange 42 extends into the female through-hole by a distance, preferably between 10 mm and 50 mm.

[0236] Each of the flanges 42 has a recess 43. Each of the recesses 43 is intended to hold an annular seal (not shown) for sealing against the outer circumference of one of the recesses 43 and against the inner circumference of the recessed through hole of the cuboid when the flange 42 is engaged with the cuboid recessed through hole.

[0237] The sealing insert 40 has a grid 48 which forms an integral part of the sealing insert 40. The grid consists of perforations 48 in a surface extending within the extension of the ribs 41. Water flowing from one cuboid to another adjacent cuboid interconnected by the sealing insert 40 must pass through the grid 48. The grid 48 is a mechanical grid but can be supplemented by a biological filter or a chemical filter, depending on any need to filter the water flowing from one cuboid to an adjacent cuboid or from a cuboid to the surrounding environment outside the cuboid.

[0238] The outer diameter of the male flange 42 is preferably 500 mm, which is the same diameter as the outer diameter of one of a plurality of standard size drain pipes. Another diameter of the male flange 42 may be selected, which may be the same diameter as the outer diameter of another of a plurality of standard size drain pipes.

[0239] like Fig.18 The portion 44 shown may be intended to allow water inside the cuboid to flow to the outside of the cube, possibly into the soil in which the modular system is buried, or to allow water outside the cuboid to enter the inside of the cuboid, perhaps from the road or pedestrian pavement above the cuboid. The portion 44 may also be intended to allow water to flow both from the inside of the cuboid to the outside of the cuboid and from the outside of the cuboid to the inside of the cuboid.

[0240] Fig.19A cover 50 for a concave through hole of a cuboid is shown. The cover 50 is intended to cover the concave through hole towards the outside of the cuboid (which may be the soil in which the cuboid is buried or may be a road or pedestrian pavement above the cuboid).

[0241] The end rib 51 extends circumferentially along the cover 50 and extends outwardly relative to the longitudinal axis A of the cover 50. The end rib 51 is intended to provide a stopper that limits the insertion of the cover 50 into the concave through-hole of the rectangular parallelepiped.

[0242] The male flange 52 extends circumferentially along the cover 50 on one side of the end rib 41 and in the longitudinal direction of the cover's central axis A. The flange 52 is sized so that when the flange 52 engages with the rectangular female through hole, the flange 62 extends into the female through hole a distance, preferably between 10 mm and 50 mm.

[0243] The flange has a recess 53. The recess 53 is intended to hold an annular seal (not shown) for sealing against the outer circumference of the recess 53 and against the inner circumference of the rectangular female through hole when the flange 52 is engaged with the rectangular female through hole.

[0244] The inner surface of the cover 50, intended to face the inside of the cuboid, is provided with radially and circumferentially extending ribs 54. The ribs 54 contribute to the ability of the cover to withstand forces acting on it from the outside.

[0245] Fig. 20A and Fig. 20B A cover 50 for a concave through hole of a cuboid is shown. The cover 50 is intended to cover the concave through hole towards the outside of the cuboid (which may be the soil in which the cuboid is buried or may be a road or pedestrian pavement above the cuboid).

[0246] The end rib 51 extends circumferentially along the cover 50 and extends outwardly relative to the longitudinal axis A of the cover 50. The end rib 51 is intended to provide a stopper that limits the insertion of the cover 50 into the concave through-hole of the rectangular parallelepiped.

[0247] The male flange 52 extends circumferentially along the cover 50 on one side of the end rib 41 and in the longitudinal direction of the cover's central axis A. The flange 52 is sized so that when the flange 52 engages with the rectangular female through hole, the flange 62 extends into the female through hole a distance, preferably between 10 mm and 50 mm.

[0248] The flange has a recess 53. The recess 53 is intended to hold an annular seal (not shown) for sealing against the outer circumference of the recess 53 and against the inner circumference of the rectangular female through hole when the flange 52 is engaged with the rectangular female through hole.

[0249] The inner surface of the cover 50, intended to face the inside of the cuboid, is provided with radially and circumferentially extending ribs 54. The ribs 54 contribute to the ability of the cover to withstand forces acting on it from the outside.

[0250] In the embodiment shown, some of the ribs 54 have a circular shape, each having a variety of diameters. The various diameters of these circular ribs correspond to the diameters of standard-sized drain pipes. The standard sizes commonly used for drain pipes have an outer diameter slightly larger than 110 mm, 160 mm, or 250 mm. Therefore, the inner diameters of the three circular ribs shown are suitable for attaching a standard-sized pipe with an outer diameter of 110 mm, 160 mm, or 250 mm to the cover. If desired, a drain pipe of standard diameter can be fitted into the cover by possibly cutting off a portion of the cover within the boundaries of the circular ribs 54 of a size corresponding to the diameter of the drain pipe to be fitted with a wire saw.

[0251] exist Fig. 20A and Fig. 20B In the embodiment shown, the cover is provided with perforations. These perforations are intended to allow water to escape from the cuboid.

[0252] The outer diameter of the male flange 52 is preferably 500 mm, which is the same diameter as the outer diameter of one of a plurality of standard size drain pipes. Another diameter of the male flange 52 may be selected, which may be the same diameter as the outer diameter of another of a plurality of standard size drain pipes.

[0253] Fig.21A and Fig.21B A cover 50 for a concave through hole of a cuboid is shown. The cover 50 is intended to cover the concave through hole towards the outside of the cuboid (which may be the soil in which the cuboid is buried or may be a road or pedestrian pavement above the cuboid).

[0254] The end rib 51 extends circumferentially along the cover 50 and extends outwardly relative to the longitudinal axis A of the cover 50. The end rib 51 is intended to provide a stopper that limits the insertion of the cover 50 into the concave through-hole of the rectangular parallelepiped.

[0255] The male flange 52 extends circumferentially along the cover 50 on one side of the end rib 41 and in the longitudinal direction of the cover's central axis A. The flange 52 is sized so that when the flange 52 engages with the rectangular female through hole, the flange 62 extends into the female through hole a distance, preferably between 10 mm and 50 mm.

[0256] The flange has a recess 53. The recess 53 is intended to hold an annular seal (not shown) for sealing against the outer circumference of the recess 53 and against the inner circumference of the rectangular female through hole when the flange 52 is engaged with the rectangular female through hole.

[0257] The inner surface of the cover 50, intended to face the inside of the cuboid, is provided with radially and circumferentially extending ribs 54. The ribs 54 contribute to the ability of the cover to withstand forces acting on it from the outside.

[0258] exist Fig.21A and Fig.21B In the embodiment shown, the cover is not provided with perforations, whereby the cover prevents water from escaping from the cuboid.

[0259] The outer diameter of the male flange 52 is preferably 500 mm, which is the same diameter as the outer diameter of one of a plurality of standard size drain pipes. Another diameter of the male flange 52 may be selected, which may be the same diameter as the outer diameter of another of a plurality of standard size drain pipes.

[0260] Fig. 22 A further embodiment of a sealing insert 55 is shown. A further embodiment of a sealing insert 55 has a plurality of holes for use with a grid or a screen (see Fig.18 and Fig.19 ) shield 56.

[0261] The sealing insert 55 with the shroud 56 has a circular central rib 57. The central rib 56 extends circumferentially along the sealing insert 55. The central rib 57 provides a stop that limits the insertion of the sealing insert 55 into the concave through-hole of an adjacent cuboid.

[0262] The male flange 58 of the sealing insert 55 extends circumferentially along the sealing insert 55 on each side of the central rib 57. The flange 58 is sized so that when the sealing insert 55 is engaged with the female through-hole of the adjacent cuboid, the flange of the sealing insert 55 extends into the female through-hole a certain distance, preferably between 10 mm and 50 mm.

[0263] The shroud 56 of the sealing insert 55 extends in the extension of a flange 58. The shroud 58 extends from a flange 58 to an opening 59 of the shroud.

[0264] In the embodiment shown, the opening 59 of the shield 56 is rectangular except that the bottom edge 60 is shaped as a portion of a circle and has a circumference corresponding to a portion of the circumference of the entire circular hole through the sealing insert 55. The opening 59 of the shield 56 has side rails 61 and a top rail 62 for inserting a grill or screen (see Fig.18 and Fig.19 ) is guided and retained in the opening 59 of the shield 36.

[0265] The outer diameter of the male flange 52 is preferably 500 mm, which is the same diameter as the outer diameter of one of a plurality of standard size drain pipes. Another diameter of the male flange 52 may be selected, which may be the same diameter as the outer diameter of another of a plurality of standard size drain pipes.

[0266] Fig.23 Shown with Fig.16 The grille insert 63 has an outer shape corresponding to the opening of the shield 54 shown. The grille insert 63 has a Fig.16 The bottom edge 64 of the shield 56 shown is engaged with the bottom edge 60, and is used to Fig.16 The side edges 65 of the side rails 61 of the shield 56 are shown to engage with the side rails 61 of the shield 56 and are used to Fig.16 The top rail 62 of the shroud 56 is shown engaging the top edge 66 .

[0267] To allow water to flow from one cuboid interconnected by a sealing insert with a shield to another adjacent cuboid, the water must pass through a grate. The grate can be a mechanical grate, a grate with a biological filter, or a grate with a chemical filter, depending on the need to filter the water flowing from one cuboid to the adjacent cuboid.

[0268] Fig.24 Shown with Fig.16 The screen insert 67 has an outer shape corresponding to the opening of the shield 56 shown. The screen insert 63 has a Fig.16 The bottom edge 68 of the shield 56 shown is engaged with the bottom edge 60, and is used to Fig.16 The side edges 69 of the side rails 61 of the shield 56 are shown to engage with the side rails 61 of the shield 56 and are used to Fig.16 The top rail 62 of the shroud 56 is shown engaging the top edge 70 .

[0269] Water is prevented from flowing from one cuboid interconnected by a sealing insert with a shield to another adjacent cuboid.In this embodiment, the screen is completely closed over the entire circumference of the screen, thereby providing complete prevention of water from passing through.

[0270] In an alternative embodiment, the screen is only partially closed within the circumference of the screen, partially allowing water to flow from one cuboid to another adjacent cuboid interconnected by a sealing insert with a shield).

[0271] An example is that the upper part of the screen is not closed. Water in the cuboids at a level above the unclosed upper part of the screen is allowed to flow from one cuboid to another adjacent cuboid interconnected by a sealing insert with a shield. Water at a level below the unclosed upper part of the screen is prevented from flowing from one cuboid to another adjacent cuboid.

[0272] Thereby, possible debris having a density higher than that of water in the water can be prevented by the screen from flowing from one cuboid interconnected by the sealing insert with the shield to another adjacent cuboid, while still allowing water to flow from one cuboid to another adjacent cuboid.

[0273] Another example is that the lower part of the screen is not closed. Water in the cuboids at a level below the unclosed lower part of the screen is allowed to flow from one cuboid to another adjacent cuboid interconnected by a sealing insert with a shield. Water at a level above the unclosed lower part of the screen is prevented from flowing from one cuboid to another adjacent cuboid.

[0274] Thereby, possible debris having a density higher than that of water in the water can be prevented by the screen from flowing from one cuboid interconnected by the sealing insert with the shield to another adjacent cuboid, while still allowing water to flow from one cuboid to another adjacent cuboid.

[0275] Yet another example is that the center portion of the screen is not closed. Water in the cuboids at the center level between the upper portion of the screen and the lower portion of the screen is allowed to flow from one cuboid interconnected by a sealing insert with a shield to another adjacent cuboid.

[0276] Water at a level below the unenclosed center portion of the screen and which may retain debris having a density higher than water, and water at a level above the unenclosed center portion of the screen and which may retain debris having a density lower than water, are both prevented from flowing from one cuboid to another adjacent cuboid, while still allowing water to flow from one cuboid to another adjacent cuboid.

[0277] Fig.25 Two possible inserts for the modular system are shown. One insert shown on the left is a barrel insert 71. The other insert shown on the right is a wicking insert 72.

[0278] The barrel insert 71 is intended for collecting debris that may flow from ground level to the cuboid of the modular system in which the barrel insert is inserted. The pipe 73 has a top grille 74 that is intended to be placed at ground level, thereby preventing larger debris from flowing to the cuboid of the modular system. The pipe 73 leads from the grille 74 to the barrel 75. The barrel 75 is closed at the bottom of the barrel 75 by a cover 50 (see FIG. 5 ) in the bottom through hole of the cuboid in which the barrel 75 is inserted. Fig.16 )support.

[0279] Perforations 76 are provided along the side surface of the bucket 75. The perforations 76 allow water to flow from the inside of the bucket to the outside of the bucket and into the cuboid in which the bucket 75 is inserted. The bottom of the bucket is not provided with perforations and is intended to collect any debris that may have passed through the grille 74. The bucket 75 can be lifted out of the cuboid by removing the grille 74, attaching a gripping tool (not shown) to the bucket 75 and lifting the bucket 75 out of the cuboid along the pipe 73. The pipe 73 is supported by a support ring 77 (see Figures 20 and 21) placed on the upper surface of the cuboid.

[0280] The wicking insert 72 is intended to deliver water that may pass through or be trapped or contained in the rectangular parallelepiped in which the wicking material 78 is inserted to the top surface of the wicking material. Perforations 79 are provided along the side surface of the wicking insert 72. The perforations 79 allow water to flow from the interior of the rectangular parallelepiped in which the wicking insert 72 is inserted to the wicking material 78. For example, the wicking material may be .

[0281] Plants, such as grass, shrubs or trees, can be planted in the soil above the wicking material. Soil is provided between the ground and the top of the cuboid in which the wicking material is inserted. Due to the perforations of the wicking insert, and due to the wicking material, any water in the cuboid can flow from the cuboid, through the perforations, along the wicking material 78 to the soil above the cuboid and from the soil to the plants planted in the soil. The wicking insert 72 is supported by a support ring 79, which is similar to the support ring 77 for the barrel insert 71.

[0282] Fig.26A and Fig.26B An embodiment of a support ring 77 is shown, which constitutes a combination of a cover 80 having a circular shape for a cuboid concave through hole (not shown) and a circular flange 81 for a drain pipe (not shown), respectively.

[0283] The cover 80 of the support ring 77 has a flange 82 having an outer diameter D2 corresponding to the inner diameter of the concave through hole of the rectangular parallelepiped to which the support ring 77 is intended to be attached. The circular flange 81 of the support ring 77 has an outer diameter D2 corresponding to the inner diameter of a standard drain pipe. Thus, a standard drain pipe can be fitted to the rectangular parallelepiped by attaching the support ring to the rectangular parallelepiped and fitting the standard drain pipe to the circular flange 81.

[0284] In the embodiment shown, the outer diameter D2 of the circular flange is 250 mm, corresponding to one size of a standard drain pipe for sewage or drainage.

[0285] The outer diameter of the male flange 82 is preferably 500 mm, which is the same diameter as the outer diameter of one of a plurality of standard size drain pipes. Another diameter of the male flange 82 may be selected, which may be the same diameter as the outer diameter of another of a plurality of standard size drain pipes.

[0286] Fig.27A and Fig.27B Another embodiment of a support ring 77 is shown, which constitutes a combination of a cover 80 having a circular shape for a cuboid concave through hole (not shown) and a circular flange 81 for a drain pipe (not shown), respectively.

[0287] The cover 80 of the support ring 77 has a flange 82 having an outer diameter D3 corresponding to the inner diameter of the concave through hole of the rectangular parallelepiped to which the support ring 77 is intended to be attached. The circular flange 81 of the support ring 77 has an outer diameter D2 corresponding to the inner diameter of a standard drain pipe. Thus, a standard drain pipe can be fitted to the rectangular parallelepiped by attaching the support ring to the rectangular parallelepiped and fitting the standard drain pipe to the circular flange 81.

[0288] In the embodiment shown, the outer diameter D3 of the circular flange is 450 mm, corresponding to another dimension of a standard drain pipe for sewage or drainage.

[0289] The outer diameter of the male flange 82 is preferably 500 mm, which is the same diameter as the outer diameter of one of a plurality of standard size drain pipes. Another diameter of the male flange 82 may be selected, which may be the same diameter as the outer diameter of another of a plurality of standard size drain pipes.

[0290] Fig.28 and Fig.29 One embodiment of a support ring and a bucket are shown respectively.

[0291] Support ring 77 support Fig.19 The pipe 73 shown. The support ring 77 can also support e.g. Fig.19 Wicking insert 72 is shown. Portions other than tubing 73 and barrel 75 or wicking insert 72 may be supported by support ring 77 as shown.

[0292] The support ring 77 has a support surface 80 of circular shape. Alternatively, the center plate has a rectangular shape. The support surface 80 is intended to be supported on the upper outer surface of the cuboid (see FIG. 20 ). The support ring 77 has a circular flange 81 of relatively small diameter extending upward from the center plate 80, and another flange 82 of relatively large diameter extending downward from the support surface 80.

[0293] Another flange 82 is intended to be inserted into a concave through hole in the upper surface of the cuboid. One flange 81 is intended to support the inner circumference of, for example, a pipe 73 (such as Fig.19 ) or for supporting, for example, the outer surface of a wicking insert 72 (as Fig.19 shown).

[0294] Fig.30 and Fig.31 Other embodiments showing the support ring and the bucket respectively

[0295] The support ring 83 has a support surface 84 of rectangular shape. Alternatively, the support surface has a circular shape. The support surface 84 is intended to be placed on the upper outer surface of a rectangular parallelepiped. The support ring 83 has a circular flange 85 having a relatively large diameter and extending upward from the support surface 84, and another flange 86 having a relatively small diameter and extending downward from the support surface 84.

[0296] Another flange 86 is intended for insertion into a concave through hole in the upper surface of the cuboid.One flange 85 is intended for supporting the outer circumference of, for example, a tube 73, or for supporting other elements extending between the support ring and the ground level below which the cuboid is buried.

[0297] Fig.32A and Fig.32B A possible embodiment of a locking portion 88 for mutually locking the corners of two adjacent cuboids is shown. The locking portion 88 is provided with a locking pin 89 extending from the mutual base plate 88. The locking pin 88 is intended to interact with a corresponding locking recess at the corner of the adjacent cuboid (see Fig. 7A , Figure 7B and Fig. 8A , Figure 8B ). When the locking pins 89 are inserted into corresponding locking recesses at the corners of adjacent cuboids, the adjacent cuboids are prevented from being displaced laterally relative to each other.

[0298] Fig.33 Another example of a modular system for forming an underground rainwater retention pond is shown. In the example shown, forty-five cuboids of the first type of cuboid are combined. The example shown does not limit any other cuboid configurations and any other uses of the first type of cuboid and / or the second type of cuboid.

[0299] Brace 90 is provided at the top side of the uppermost cuboids on the left and right sides of the figure. Brace 90 is composed of an S-shaped profile, wherein an upper section 91 of the S-shaped profile extends along the edge of the upper surface of the uppermost cuboids on the left and right sides of the figure, and wherein a middle section 92 of the S-shaped profile extends along the side surfaces of these uppermost cuboids. A lower section 93 of the S-shaped brace extends outward from the middle section 92.

[0300] The groove 94 is provided along the side surface of the lowermost cuboid on the left and right sides of the figure. The groove 91 is formed by an L-shaped profile, wherein an upward section 95 of the L-shaped profile extends along the side surface of the lowermost cuboid on the left and right sides, and wherein a transverse section 96 of the L-shaped profile is perpendicular to the upward section 95 and extends outward in the extension of the lowermost surface of the lowermost cuboid on the left and right sides.

[0301] Rod 97 is attached to lower section 93 of S-shaped spacer 90 and to upwardly extending section 95 of L-shaped slot 94. Rod 97 connects spacer 90 with slot 94 so that the uppermost cuboid cannot be displaced from slot 94. When the cuboid is buried in the ground, slot 94 is filled with soil, and the soil extends upward along the side surface of the cuboid.

[0302] If possible underground forces beneath the cuboids (such as forces from groundwater located below the cuboid stack and trough) attempt to force the cuboid stack and trough upward, the soil in and above the trough will prevent the trough from being displaced upward by the possible underground forces.

[0303] Because the spacers 90 along the upper edges of the uppermost cuboids on the left and right sides of the figure are connected to the slots 94 via the rods 07, the spacers 90 on the left and right sides and the uppermost cuboids are prevented from shifting upward. Because all the cuboids in the cuboid stack are connected to each other, when a possible underground force attempts to force the cuboid stack upward, the remaining cuboids in the cuboid stack are prevented from shifting upward.

[0304] Fig.34 A possible embodiment of a side locking portion 97 for locking the side edges of two adjacent cuboids to each other is shown. The side locking portion 97 is provided with a locking wedge 98. The locking wedge 98 is intended to interact with a corresponding locking recess at the side edge of the adjacent cuboid. When the locking wedge 98 is inserted into the corresponding locking recess at the side edge of the adjacent cuboid, the adjacent cuboids are prevented from shifting up and down relative to each other.

[0305] Fig.35 A bottom plate 100 is shown which is intended for insertion into the bottom of a cuboid. The bottom plate 100 has a central section 101 and has side sections 102 extending along the central section. The side sections 102 are provided with grooves 103 extending from the central section 101 to the outer edges of the side sections 102. The grooves 103 are intended for interaction with the ribs of the cuboid, see e.g. Fig.10 .

[0306] In the embodiment of the bottom plate 100 shown, the recesses 103 of the side sections 102 are dimensioned and spaced apart from one another by a distance d so as to interact with the cuboid support ribs 19, such as Fig.10 Other sizes and other distances between the grooves 103 may be provided to facilitate interfacing with other support ribs along the inner surface (e.g., as shown in FIGS. 7a and Figure 7B Other embodiments of the rectangular body (support ribs shown in the embodiment) interact with each other.

[0307] The base plate 100 is intended to provide a planar surface in the bottom of a rectangular parallelepiped. Fig.10The cuboid shown has support ribs 19 disposed along the inner surface of the cuboid. As described above, the support ribs 19 are intended to impart rigidity to the cuboid. However, the support ribs 19 in the bottom of the cuboid, and thus the gaps between the support ribs 19, may collect debris that flows along with rainwater flowing into or through the cuboid. Such debris may have to be or must be removed at regular intervals to ensure adequate flow of rainwater.

[0308] Providing a bottom plate 100 in the bottom of the cuboid avoids or at least minimizes the collection of debris in the bottom of the cuboid. Thus, the bottom of the cuboid will not collect and store debris, or at least the amount of debris will be minimal. This is an advantage of avoiding any debris collection in the bottom of the cuboid and potentially limiting the flow of rainwater into or through the cuboid.

[0309] FIG. 36A to FIG. 36C A possible embodiment of a locking member 104 is shown for locking the upper and lower parts of the cuboid together, the locking member being for example FIG. 9A to FIG. 9B In addition or alternative to the locking recess 35 and tenon 35A shown, the locking member 104 is elongated and has an enlargement 105, 106 in each end of the intermediate extension 107. The enlarged ends 105, 106 of the locking member 105 interact with corresponding cavities 108, 109 in the upper and lower parts of the cuboid, respectively.

[0310] The intermediate extension 107 of the locking member 105 interacts with corresponding cavities 110, 111 in the upper and lower parts of the cuboid, respectively. In an alternative embodiment, only cavities 108, 109 are provided in the upper and lower parts of the cuboid, respectively, with which the enlarged ends 105, 106 of the locking member 104 interact. The enlarged ends 105, 106 of the locking member 104 may have other shapes than the trapezoidal shape shown in the embodiment, such as the shape of a triangle, parallelogram or other polygon, or may have a more or less circular shape.

[0311] In the embodiment shown, the width w of the middle section 107 is 10 mm and the length is 116 mm. The width of the enlarged end sections 105, 106 is at least 1.5 times greater, preferably at least 2 times greater, than the width w of the middle section.

[0312] The locking members shown in the figure are intended to be inserted into the cavities of the upper and lower parts of the cuboid when they have been assembled edge to edge. A plurality of locking members are provided along the edges of the upper and lower parts of the assembled cuboid. The plurality of locking members lock the upper and lower parts together, thereby preventing the upper and lower parts from releasing from each other when in the ground.

[0313] Fig.37 A possible layout of a module system for use as an underground rainwater detention tank is shown. In the layout shown, only cuboids of the first type are shown. However, depending on the needs and choices to be met by the module system, also or only cuboids of the second type may be incorporated into the layout.

[0314] This layout shows that the layout of the module system can be designed according to any external obstacles that may exist in the underground in-situ where the module system is to be provided. The module system can avoid sewage pipes, central heat pipes, ventilation pipes, gas pipes and water pipes, electrical and telecommunications wiring and other underground obstacles. Obstacles may also be tree roots, building foundations, road guardrail poles, garbage cans or other above-ground equipment.

[0315] Another advantage of the cuboids shown is that if one or more cuboids need to be excavated to access possible installations in the ground and below the module system, then another new cuboid can be excavated to provide access to the module system. Figure 6 The type shown has only a concave through hole, so that the cuboid can be dug out and replaced with the new another cuboid.

[0316] Once one or more already buried cuboids have been dug out of the ground, and after possible installations under the module system have been serviced, one or more new cuboids must be installed to replace the cuboids that have been dug out to access these installations. This is also possible with cuboids having only concave through-holes, since no flanges extend outside the side surfaces of the cuboids. Such flanges, if provided, would otherwise hinder the lateral access of a cuboid to a new cuboid between two, three or four adjacent cuboids and already placed in the ground.

Claims

1. A unit for a modular system for use as an underground stormwater detention tank, The unit is a three-dimensional unit (1, 21) comprising at least one main surface (2, 22) and at least three side surfaces (3-6, 23-26), each of the side surfaces (3-6, 23-26) extending from a common boundary (7) between the at least one main surface (2, 22) and the respective side surface (3-6, 23-26), and wherein, Adjacent side surfaces (3-6, 23-26) are angled relative to each other, - each of the side surfaces (3-6) has a side edge extending from a corner of the at least one main surface (2, 22), and each of the side edges of a side surface is interconnected with a side edge of another adjacent side surface, - wherein the three-dimensional cell has an internal volume and at least one through hole in one of the side edges (3-6, 23-26), the three-dimensional cell forming a watertight module when connected to at least one other three-dimensional cell, the watertight module allowing water to be contained within the three-dimensional cell or, provided that the three-dimensional cell has at least two through holes, allowing water to flow through the three-dimensional cell from one through hole in one side surface to another through hole in another side surface, and -Wherein, the at least one through hole is a concave through hole (8, 28) or a convex through hole (9, 29), and when the through hole is a concave through hole (8, 28), the through hole is used to insert into an insertion flange (11) of a convex through hole (9, 29) of another three-dimensional unit, and when the through hole is a convex through hole (9, 29), the through hole has an insertion flange for inserting into a concave through hole (9, 29) of another three-dimensional unit.

2. The unit according to claim 1, the three-dimensional unit is made of at least two separate parts connected to each other thereby forming the internal volume of the three-dimensional unit, each separate part having one of the following: at least a part of the main surface, at least a part of the side surfaces, at least parts of both the main surface and the side surfaces, and - at least one of the at least two separate parts has at least one of the following: a part of the concave through hole (8, 28), a part of the convex through hole (9, 29), the entire concave through hole (8, 28), the entire convex through hole (9, 29), and -in, At least a portion of each of these side surfaces (3-6, 23-26) has a free edge (3A-6A, 23A-26A) oriented opposite to the common boundary between the at least one main surface (2, 22) and each of these side surfaces (3-6, 23-26), each of the free edges having a device for connecting in a watertight manner with a free edge of a side surface of another separate part of the three-dimensional unit to form a watertight three-dimensional unit made of the at least two separate parts.

3. A unit according to claim 1 or 2, -in, The concave through hole (8, 28) has a support flange (10, 30) extending along the circumference of the concave through hole (8, 28), the support flange (10, 30) being intended to limit the axial extension of the annular seal, and - wherein the male through hole (9, 29) has an insertion flange (11) intended for insertion into the female through hole (8, 28) of an adjacent unit, and the outer circumference of the insertion flange (11) is intended for retaining the annular seal.

4. A unit according to any one of claims 1 to 3, wherein: - at least three side surfaces (3-6, 23-26) have free side edges (3A-6A, 23A-26A) extending opposite a common border (7) between the at least one main surface (2, 22) and the side surfaces (3-6, 23-26), - wherein the free side edges (3A-6A, 23A-26A) extend between the joined edges so that the free edges constitute the circumference of the opening of the half-sized portion of the three-dimensional cell, which opening is not a through hole, - the opening intended to be closed by the free edge of one half-sized portion of the three-dimensional unit is assembled in a watertight manner with the equivalent free edge of another half-sized portion of the three-dimensional unit, and - At least one side surface (3-6, 23-26) of the half-size portion of the three-dimensional unit has a portion of a through hole (8, 9, 28, 29), which portion of the through hole (8, 9, 28, 29) is preferably a portion of one of a concave through hole (8, 28) or a convex through hole (9, 29).

5. A unit according to any one of claims 1 to 4, wherein: - the three-dimensional unit is selected from the following unit shapes: a cuboid, such as a cube, with right angles between all faces; a cuboid, such as a cube, with non-right angles between at least some of the faces; a prism whose at least one main face has a polygonal cross section, - wherein the polygonal cross-section of the prism is preferably an equilateral triangle shape or an equilateral hexagon shape, the at least one main surface has a cylindrical polygonal cross-section, and - A cylinder in which the polygonal cross-section of the cylinder is preferably an equilateral triangle shape or an equilateral hexagon shape, and the at least one main surface has a circular cross-section or an elliptical cross-section.

6. A unit according to any one of claims 1 or 3 to 5, wherein: The three-dimensional unit is manufactured by one of the following processes: the modular system is cast or molded into a full-sized three-dimensional unit having the geometry and dimensions of the full-sized three-dimensional unit for the modular system.

7. A unit according to any one of claims 1 or 2 to 5, wherein: The three-dimensional unit is manufactured by one of the following processes: casting or molding a part having half the size of the three-dimensional unit and a geometry and size that is a portion of the full-size unit.

8. A unit according to any one of claims 1 to 7, wherein: Also under the condition that the three-dimensional unit is made of at least two parts and exhibits at least two main surfaces, the three-dimensional unit has at least one main surface, the at least one main surface is capable of withstanding at least 60 kN / m in a direction perpendicular to the at least one main surface 2 load, preferably at least 150 kN / m 2 Load, possibly at least 300kN / m 2 of load.

9. A unit according to any one of claims 1 to 8, wherein: The three-dimensional unit can withstand at least 120,000 N / m when all through holes and any other openings are closed so that any fluid within the internal volume of the three-dimensional unit cannot escape from the unit. 2 , possibly at least 130000N / m 2 , maybe even at least 140000N / m 2 , and may even be greater than 140000N / m 2 internal pressure.

10. The unit according to claim 10, wherein: The three-dimensional unit is a full-size cuboid made of an even number of half-size parts of a cuboid, wherein the full-size cuboid is composed of two substantially rectangular main surfaces (2, 22) parallel to each other and four side surfaces (3-6, 23-26) each perpendicular to these main surfaces (2, 22), and the number of half-size parts of the cuboid is preferably two parts, alternatively four parts.

11. A unit according to any one of claims 1 to 9, the three-dimensional unit is a full-sized cuboid made of at least two half-sized parts of the full-sized cuboid, the full-sized cuboid being constituted by two substantially rectangular main surfaces parallel to each other and four side surfaces (3-6, 23-26), - each of these side surfaces (3-6) has a common border (7) between the one main surface (2, 22) and the respective side surface (3-6, 23-26) and between the respective side surface and the other adjacent side surfaces, - the side surfaces (3-6, 23-26) extend perpendicularly from the edges between the two main surfaces (2, 22) and the side surfaces (3-6, 23-26), and the opposite side surfaces (3-6, 23-26) are parallel to each other, - at least two of the four side surfaces (3-6, 23-26) each have a side edge provided by connecting a free side edge of one half-size portion of the cuboid (1, 21) with a free edge of another half-size portion of the cuboid, and at least one other side surface (3-6, 23-26) has a portion of a through hole, which portion of the through hole is preferably a portion of a substantially full-circular through hole, - wherein the full-size cuboid provides an internal volume that allows water to be contained within the cuboid or to flow through the cuboid from a through hole in one surface to another through hole in another surface, provided that the cuboid has at least two through holes, -in, Each through hole is one of a concave through hole (8, 28) or a convex through hole (9, 29), and under the condition that the through hole is a concave through hole, the hole is used to insert the flange of the convex through hole (9, 29), and under the condition that the part is one of the convex through holes (9, 29), the hole has a flange for inserting into the concave through hole (8, 28).

12. The unit according to claim 11, - wherein the length (L1) of two opposing first parallel side surfaces (3, 4, 23, 24) in a direction parallel to the main surface and the length (L2) of two further second parallel side surfaces (5, 6, 25, 26) in a direction parallel to the main surface (2, 22) are the same, the half-sized portion of the cuboid (1, 21) thus having a substantially square main surface (2, 22), and -in, The extension (L3) of these side surfaces (3-6, 23-26) in a direction perpendicular to the main surface is substantially the same as the extension of these side surfaces (3-6, 23-26) parallel to these main surfaces (2, 22), and the half-size part of the rectangular parallelepiped (1, 21) component thus forms a full-size rectangular parallelepiped with a substantially cubic shape.

13. A unit according to claim 11 or 12, wherein: Each of these main surfaces is capable of withstanding at least 60 kN / m in a direction perpendicular to these main surfaces 2 load, preferably at least 150 kN / m 2 Load, possibly at least 300kN / m 2 of load.

14. A unit according to any one of claims 1 to 11, -The three-dimensional unit is a full-size cuboid made of a monolithic cuboid, - each of these side surfaces (3-6) has a common border (7) between the one main surface (2, 22) and the respective side surface (3-6, 23-26) and between the respective side surface and the other adjacent side surfaces, - the full-size cuboid is composed of two substantially rectangular main surfaces parallel to each other and four side surfaces (3-6, 23-26), the side surfaces (3-6, 23-26) extending perpendicularly from the edges between the two main surfaces (2, 22) and the side surfaces (3-6, 23-26), and the opposite side surfaces (3-6, 23-26) are parallel to each other, -in, The full-size cuboid provides an internal volume that allows water to be contained within the cuboid or to flow through the cuboid from a through hole in one surface to another through hole in another surface of the cuboid, provided that the cuboid has at least two through holes, -in, Each through hole is one of a concave through hole (8, 28) or a convex through hole (9, 29), and under the condition that the through hole is a concave through hole (8, 28), the hole is used to insert the flange of the convex through hole (9, 29), and under the condition that the part is one of the convex through holes (9, 29), the hole has a flange for inserting into the concave through hole (8, 28).

15. The unit of claim 12, wherein: Each of these main surfaces is capable of withstanding at least 60 kN / m in a direction perpendicular to these main surfaces 2 Load, possibly at least 150kN / m 2 Load, possibly at least 300kN / m 2 of load.

16. A unit according to any one of claims 1 to 11, - the three-dimensional unit is a half-size portion of a cuboid (1, 21) consisting of a substantially rectangular main surface (2, 22) and four side surfaces (3-6, 23-26), the side surfaces (3-6, 23-26) extending perpendicularly from the edge between the one main surface (2, 22) and the side surfaces (3-26), and the opposite side surfaces (3-6, 23-26) are parallel to each other, - each of these side surfaces (3-6) has a common border (7) between the one main surface (2, 22) and the respective side surface (3-6, 23-26) and between the respective side surface and the other adjacent side surfaces, - at least two of the four side surfaces (3-6, 23-26) each have a free side edge (3A-6A, 23A-26A) extending opposite and parallel to a common border (7) between the one main surface (2, 22) and each of the at least two side surfaces (3-6, 23-26), and at least one other side surface (3-6, 23-26) has a portion of a through hole (8, 9), the portion of the through hole (8, 9) preferably being a portion of a substantially semicircular through hole, - wherein at least a portion of the free side edges (3A-6A, 23A, 26A) oriented opposite to the common border (7) between the main surface (2, 22) and the side surfaces (3-6, 23-26) is provided with means for connecting the free side edges (3A-6A, 23A-26A) of the half-sized portion of the cuboid (1, 21) with the free side edges of another half-sized portion of the cuboid (1, 21) to form a full-sized cuboid, and -in, The portion of the through hole is one of a concave through hole (8, 28) or a convex through hole (9, 29), and under the condition that the portion is one of the concave through holes (8, 28), the portion is a hole for inserting a flange of the convex through hole (9, 29), and under the condition that the portion is one of the convex through holes (9, 29), the portion is a flange for inserting into the concave through hole (8, 28).

17. The unit according to claim 16, - wherein the length (L1) of two opposite first parallel side surfaces (3, 4, 23, 24) in a direction parallel to the main surface (2, 22) and the length (L2) of two further second parallel side surfaces (5, 6, 23, 26) in a direction parallel to the main surface (2, 22) are the same, the half-sized portion of the cuboid (1, 21) thus having a substantially square main surface (2, 22), and -in, The extension (L3) of these side surfaces (3-6, 23-26) in a direction perpendicular to the main surface (2, 22) is substantially half of the extension of these side surfaces (3-6, 23-26) in a direction parallel to the main surface (2, 22), and the half-size portion (1, 21) of the rectangular parallelepiped thus substantially forms a half-size portion of a cube shape.

18. Part of a modular system for use in an underground stormwater detention tank comprising a plurality of three-dimensional units according to any one of claims 1 to 17, - the portion constitutes a main surface (2A) separate from the side surfaces (3-6, 23-26) of the three-dimensional unit and is intended to constitute part of a half-sized portion of a cuboid or part of a full-sized cuboid, The single main surface (2a) is provided with corresponding engagement means (35) for engaging the side surfaces (3-6, 23-26) of the cuboid so as to make the single main surface part of the cuboid (35A).

19. Part of a modular system for use in an underground stormwater detention tank comprising a plurality of three-dimensional cells according to any one of claims 1 to 17, the part constituting a sealing insert (40, 44) for insertion into the three-dimensional cells, the sealing insert (40, 44) has a rib (41, 45) extending outwardly relative to a central axis (A) of the sealing insert (40, 44) and defining a closed annular outer circumference of the sealing insert (40, 44), and the sealing insert (40, 44) has at least one flange (42, 46) extending in the direction of the central axis (A) and defining a closed annular inner circumference of the sealing insert (40, 44), and the at least one flange (42, 46) is intended to be inserted into a through hole of the three-dimensional unit, and the inner circumference of the sealing insert (40, 44) is smaller than the inner circumference of the through hole into which the sealing insert (40, 44) is intended to be inserted, - and the at least one flange (42, 46) has a recess (43, 47) intended to occupy the inner circumference of an annular seal intended to seal between the flange of the sealing insert (40, 44) and the through hole into which the sealing insert (40, 44) is intended to be inserted.

20. Part of a modular system for use in an underground rainwater retention tank comprising a plurality of three-dimensional cells according to any one of claims 1 to 17, the part constituting a cover (50) for insertion into the three-dimensional cells, - the cover (50) has a rib extending outwardly relative to the central axis (A) of the cover (50) and defining a closed annular outer circumference of the cover, and - the cover (50) has at least one first flange, which extends in the direction of the central axis (A) and defines a closed annular inner circumference of the cover, and - the flange is intended to be inserted into a through hole of the three-dimensional unit, and the inner circumference of the cover (50) is smaller than the inner circumference of the through hole that the cover (50) is intended to cover - and the flange has a recess intended to occupy the inner circumference of an annular seal intended to seal between the flange of the cover (50) and the through-hole that the cover (50) is intended to cover.

21. Part of a modular system for use in an underground stormwater detention tank comprising a plurality of three-dimensional cells according to any one of claims 1 to 17, the part constituting a grid (48) for insertion into the three-dimensional cells, - the grille (48) has ribs (41, 45) extending outwardly relative to a central axis (A) of the grille (48) and defining a closed annular outer circumference of the grille (48), and - the grille (48) has at least one flange (42, 46) extending in the direction of the central axis (A) and defining a closed annular inner circumference of the grille (48), and The at least one flange (42, 46) is intended to be inserted into a through hole of the three-dimensional unit, and the inner circumference of the grille (48) is smaller than the inner circumference of the through hole into which the grille (48) is intended to be inserted.

22. A portion of a grille (48) according to claim 21 and constituting a portion for insertion into a three-dimensional unit, the grille having at least one flange (42, 46) having a recess (43, 47) intended to occupy the inner circumference of an annular seal, the annular seal being intended to seal between the flange of the grille (48) and a through hole into which the grille (48) is intended to be inserted.

23. A grid (48) according to claim 21 or 22 and forming part of a grid for insertion into a three-dimensional unit, the grid having a number and size of perforations, the perforations preferably having a diameter of 10 mm. 2 With 50mm 2 The minimum cross-sectional area between the grille and allow water to flow through the through holes into which the grille is intended to be inserted, while the perforations simultaneously prevent sediment and other materials from flowing through the through holes into which the grille is intended to be inserted.

24. A method according to claim 23 and forming part of a grid (48) for insertion into a three-dimensional cell, wherein: These perforations are frustoconical with the smallest cross-sectional area facing outwards relative to the internal volume of the three-dimensional cells into whose through-holes the grid is intended to be inserted and the largest cross-sectional area facing the internal volume of the three-dimensional cells into whose through-holes the grid is intended to be inserted.

25. Part of a modular system for use in an underground stormwater detention tank comprising a plurality of three-dimensional cells according to any one of claims 1 to 17, the part constituting a shield (56) intended to be inserted into the three-dimensional cells, - the shield (56) has a rib (57) extending outwardly relative to the central axis (A) of the shield (56) and defining a closed annular outer circumference of the shield (56), and - the shield (56) has at least one flange (58) extending in the direction of the central axis (A) and defining a closed annular inner circumference of the shield (56), and - the at least one flange (58) is intended to be inserted into a through hole of the three-dimensional unit, and the inner circumference of the shield (56) is smaller than the inner circumference of the through hole into which the shield (56) is intended to be inserted, - and the at least one flange (58) has a recess (59) intended to occupy the inner circumference of an annular seal intended to seal between the flange of the shield (56) and the through hole into which the shield (56) is intended to be inserted, - the shield (56) has side rails (61) for guiding and holding one of the grilles (63) or screens (67), the side rails (61) extending perpendicularly to the central axis (A) of the shield (56), and The shield (56) comprises an insert chosen from a grille (63) or a screen (67), each insert having side edges (65, 69) for insertion into the side rails (61) and intended to partially or completely close the opening through the shield (56).

26. Part of a modular system for use in an underground stormwater detention tank comprising a plurality of three-dimensional cells according to any one of claims 1 to 17, the part constituting a barrel insert (71) intended to be inserted into the three-dimensional cells, - the barrel insert (71) has a support surface (77) extending outwardly relative to and perpendicular to a central axis of the barrel insert (71) and defining an outer circumference of the barrel insert, and the support surface (77) has a flange (81, 85) extending in the direction of the central axis and defining a closed annular circumference of the barrel insert (71) and intended for supporting the pipe (73), and the barrel insert (71) has a further flange (82, 86) extending in the direction of the central axis and defining a closed annular circumference of the barrel insert (71) and intended for insertion into a concave through hole (8, 28) of the three-dimensional unit, - the outer circumference of the other flange (82, 86) is smaller than the inner circumference of the concave through hole (8, 28) of the three-dimensional unit, And the further flange (82, 86) is intended for insertion into the concave through hole (8, 28) of the three-dimensional unit.

27. Part of a modular system for use in an underground stormwater detention tank, the underground stormwater detention tank comprising a plurality of three-dimensional units according to any one of claims 1 to 17, the part for the modular system constituting a barrel insert (78) intended to be inserted into the three-dimensional units, - the wicking insert (78) has a support surface extending outwardly relative to and perpendicular to the central axis of the wicking insert and defining an outer circumference of the wicking insert, and - the wicking insert has a flange extending in the direction of the central axis and defining a closed annular circumference of the wicking insert and intended for supporting an outer circumference of wicking material, and the wicking insert has a further flange extending in the direction of the central axis and defining a closed annular circumference of the wicking insert and intended for insertion into a through hole of the three-dimensional cell, and - The outer circumference of the further flange of the wicking insert is smaller than the inner circumference of the through-hole into which the further flange of the wicking insert is intended to be inserted.

28. Part of a modular system for use in an underground stormwater detention tank comprising a plurality of three-dimensional cells according to any one of claims 1 to 17, the part constituting a seal according to claim 11 or 12 for sealing between the free edges of two half-size portions of a cuboid, wherein The half-size parts of the cuboid are intended to be attached to each other, the seal having - a linear intermediate section (37) intended to be inserted between the free edges of a first type of cuboid, said free edges respectively having a convex circle and a concave circle, - an end section (38) having an extension corresponding to the extension of the concave through-hole (8, 28) of the first type of cuboid, and - another end section (38) having an extension corresponding to the extension of the convex through-hole (9, 29) of the first type of cuboid.

29. A part of a modular system for use in an underground rainwater detention tank, the underground rainwater detention tank comprising a plurality of three-dimensional units according to any one of claims 1 to 17, the part for the modular system constituting a bottom plate (100) intended to be inserted into the three-dimensional unit to cover the bottom of the three-dimensional unit, the bottom plate (100) having - a central section (101) and side sections (102), the side sections (102) extending from the central section (101) and the outer edges of the side sections (102) forming part of the outer boundary of the base plate (101), - the side segments (102) have grooves (103) extending from the central segment (1019) to the outer edges of the side segments (102), the grooves (103) being arranged at selected distances (d) along the side segments (102), - The chosen distance (d) between the chosen grooves (103) corresponds to the distance between the ribs along the inner surface of the three-dimensional unit into which the base plate (100) is intended to be inserted.

30. A part of a modular system for use in an underground rainwater detention tank, the underground rainwater detention tank comprising a plurality of three-dimensional units according to any one of claims 1 to 17, the part for the modular system constituting a locking member (104) intended to hold together one part and another part of the cuboid, respectively, the locking member (104) having - a middle section (107) and end sections (105, 106), the end sections (105, 106) extending from opposite ends of the middle section (107) and the end sections (105, 106) having a shape enlarged relative to the shape of the middle section (107), - each of the enlarged end sections (105, 106) has a width greater than the width of the middle section (107), the width of the enlarged end section and the width of the middle section being considered to extend transversely from the longitudinal direction of the locking member, - When the cuboid is made of one half-sized portion of a full-sized cuboid and another half-sized portion of a full-sized cuboid, at least the enlarged end sections (105, 106) are intended to interact with corresponding cavities (108, 109) of one portion and another portion of the cuboid, respectively.

31. An underground rainwater detention pond constituting a modular system, comprising a plurality of three-dimensional units according to any one of claims 1 to 17 and buried in the ground below the ground level of a site, wherein: The rainwater detention pond is positioned so that a certain number of the plurality of three-dimensional units constitute the uppermost three-dimensional units towards the ground level, and the distance between the upper main surface of at least one of the uppermost three-dimensional units and the ground level is less than 80 cm, preferably less than 60 cm, possibly less than 40 cm.

32. A method of constructing an underground rainwater detention pond constituting a modular system, the underground water detention pond comprising a plurality of three-dimensional units according to any one of claims 1 to 17, the method comprising the following steps: - providing a plurality of three-dimensional units of the first type made of two half-size portions of the three-dimensional unit of the first type, and assembling the plurality of full-size cuboids at the site of the underground stormwater detention tank by the following assembly method: - inserting the flange of the convex through hole (9, 29) at the side surface of one cuboid into the concave through hole (8, 28) at the opposite side surface of another adjacent cuboid to assemble a plurality of cuboids of the first type, and - an annular seal is provided between the outer circumference of the flange of the male through hole (9, 29) of the one cuboid and the inner circumference of the female through hole (8, 28) of the other adjacent cuboid.

33. Use of a plurality of three-dimensional units according to any one of claims 1 to 17 for constructing an underground rainwater retention pond according to claim 31.

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