NL2017482B1 - Method for providing a temporary sports field and sports field provided thereby - Google Patents

Abstract

Method for providing a temporary sports field, comprising the steps of providing a base structure over a surface area and providing a cover over said base structure, wherein: - the base structure is formed from base elements which are interconnected for forming the base structure defining a deck; - the base elements comprising a top and a bottom and sides enclosing a void, wherein the sides are at least partly open, - the base elements are interconnected such that voids of at least a number of adjacent base elements are interconnected with each other through said sides; and - wherein the cover comprises at least a layer of natural or artificial grass which layer is formed on said base structure from tiles and/or strips; wherein after a period of time the cover is removed from the base structure and preferably stored and the base structure is removed from the surface area for reuse at the same or a different surface area with the same or a different cover.

Description

Patent center

The Netherlands

(21) Application number: 2017482 © Application submitted: 09/16/2016 © 2017482

PATENT (1) Int. Cl .:

E03F 1/00 (2017.01) E01C 5/22 (2017.01) A63C 19/04 (2017.01) E01C 13/08 (2017.01) E01C 13/02 (2017.01) E01C 3/00 (2017.01) E02D 27/02 (2017.01) E01C 13/00 (2017.01)

(YES Application registered: ^ 3) Patent holder (s): 03/22/2018 Sustainable Water and Drainage Systems Limited in Warrington, United Kingdom, GB. (43) Application published: (72) Inventor (s): (47) Patent granted: Lee Anthony Penrose in Warrington (GB). 03/22/2018 (45) Patent issued: (74) Agent: 23/03/2018 ir. C.M. Jansen et al. In The Hague.

© Method for providing a temporary sports field and sports field provided © Method for providing a temporary sports field, including the steps of providing a base structure over a surface area and providing a cover over said base structure, providing:

- the base structure is formed from base elements which are interconnected for forming the base structure defining a deck;

- the base elements including a top and a bottom and sides avoid enclosing, the sides are at least partly open,

- the base elements are interconnected such that voids or at least a number of adjacent base elements are interconnected with each other through said sides; and

- the cover comprises at least a layer of natural or artificial grass which layer is formed on said base structure from tiles and / or strips;

if after a period of time the cover is removed from the base structure and preferably stored and the base structure is removed from the surface area for reuse at the same or a different surface area with the same or a different cover.

NL BI 2017482

This patent has been granted regardless of the attached result of the research into the state of the art and written opinion. The patent corresponds to the documents originally submitted.

P110559NL00

Title: Method for providing a temporary sports field and sports field provided

The invention relates to a method for providing a sports field. Furthermore, the invention relates to sports field provided.

Sports such as for example but not limited to soccer, rugby, tennis and polo are traditionally played on pitches covered by natural grass. These are costly to maintain since they are maintenance prone. They are moreover very susceptible to climate. For example they may become saturated with water or dry out due to sun shine and heat. Moreover, such pitches will easily be damaged.

In order to avoid these problems and allow more intensive use of sports fields artificial sports fields have been developed, for example made of plastic material. They may be woven and / or non woven and may include artificial grass filaments, representing haulms. A filling material such as sand or rubber filler elements can be provided in between such filaments. Artificial sports fields are generally more durable and require less maintenance than natural grass.

Artificial grass is not always acceptable as a surface for performing sports, especially professional sports, or are not the surface for choice for matches or tournaments. On the other hand natural grass is not always the surface of choice either, for example for sports which require a fast and flat pitch, which can be for example field hockey, tennis, football or the like.

An aim of the present disclosure is to provide for a method for providing a temporary sports field. An aim of the present disclosure is to provide for a method for providing a sports field structure which can temporarily provide for a sports field. An aim of the present disclosure is to provide for a sports field which is relatively easy to form and remove again. An aim of the present disclosure is to provide for a sports field which can provide for a surface of choice at a place where already a sports field is provided. An aim of the present disclosure is to provide for a method for forming a sports field and removing it again for reuse later and / or in a different position.

At least one of these and other aims is available with method or a sports field structure and modules according to this disclosure.

In an aspect this disclosure can be characterized by a method for providing a temporary sports field, including the steps of providing a base structure over a surface area and providing a cover over said base structure, where the cover is removable from the base structure, and the base structure is removable from the surface area about which it is provided. The method can include the steps of:

forming the base structure from base elements which are interconnected for forming the base structure defining a deck, the base elements including a top and a bottom and sides enclosing a void, being the sides are at least partly open, interconnected the base elements such that voids or at least a number of adjacent base elements are interconnected with each other through said sides providing the cover which comprises at least a layer of natural or artificial grass, which layer is formed on said base structure from tiles and / or strips.

After a period or time the cover has been removed again from the base structure and stored and the base structure has been removed from the surface area for reuse at the same or a different surface area with the same or a different cover. Alternatively the cover may be replaced by another cover, for example replacing a layer of natural grass by a layer of artificial grass or vice versa, or by a different layer such as flooring.

In this description the period of time between providing the sports field and removing it again is preferably relatively short, and may be less than a year, preferably less than half a year. Said period can be for example less than 3 months and can be for example between a day and several weeks. Said period can be an example for the duration of a sports match or a tournament.

A method according to the disclosure can be especially suitable for providing the sports field on a surface area formed by a sports field, especially a sports field made of natural grass, artificial grass and / or artificial turf such as tartan, tarmac or soil. The sports field about which the temporary sports field is provided can be a permanent sports field which is for example not properly suitable for a sport to be performed, or played for a match or tournament to be played. For example:

the cover comprises a surface formed by natural grass and the surface area about which said temporary sports field is provided is a sports field having a surface made of natural grass; or the cover comprises a surface formed by natural grass and the surface area about which said temporary sports field is provided is a sports field having a surface made of artificial grass; or the cover comprises a surface formed by artificial grass and the surface area about which said temporary sports field is provided is a sports field having a surface made of natural grass or artificial grass.

In an aspect the disclosure can be characterized in that the base structure comprises a series of base elements, interconnected for forming the base structure defining the deck, the base elements preferably include a deck and an bottom, interconnected by at least an array of pillars , preferably at least the deck is provided with opening for passing said fluids.

A basic element can be a generally box-shaped element, having at least a bottom and said deck, spaced apart and connected to each other by the pillars. The base element may have side walls and preferably encloses an internal volume. The internal volume can be designed for containing a volume of water that can be transported from the internal volume or the base element to the top layer through a wick element or elements, such as for example through the pillars. Base elements can be interconnected forming a base structure. Interconnected base elements preferably have an internal volume, the internal volumes being in fluid connection, effectively forming a joined internal volume. The deck of a base element can be substantially flat, such that interconnected base elements can provide for a substantial flat continuous surface area, which can be partly or completely covered by the top layer. A membrane can be provided between the top layer and the deck.

A membrane can be placed over the deck or joined decks, and can be connected to the or each deck by locking elements locking the membrane into the pillar or opening into the deck opening into the pillar. To this end the membrane, especially an edge portion of a slit or cut-out can be pushed into the pillar or opening into the deck opening into the pillar and be held into a locking element forced into said opening or open top of the pillar. The locking element can for example fit in said opening or pillar end by a form lock, a snap lock, threading or any other suitable means. Alternatively the top layer can be placed directly on the deck and can then, if desired, be locked in placed as described here above. Alternatively it can be placed freely on top of the deck or can otherwise be connected to the deck, for example by glue or adhesive or tape.

A base element of this disclosure can for example be made of plastic and can have a deck which is resiliently flexible for providing added flexibility to an area made using such base elements.

At least one membrane or layer, or, if two or more such membranes are provided, at least one of the membranes or layers provided on top of the modules, supporting the top layer directly or indirectly, for example by means of a sub layer, can be fluid tight, especially substantially water impermeable, such that water cannot pass through said membrane into or out of the module, unless specific provisions are provided in said membrane, such as opening, valves, water permeable elements, such as filters or drainpipes or the like, opening into or out of the said modules. At least one membrane on top of the modules can be fluid permeable, especially water permeable, such that fluid, especially water can pass through the membrane and / or out of the module.

In further elucidation of the present invention of the present disclosure, such as various of a sports field, as well as methods for forming the same shall be described hereafter, with reference to the drawings. In the description a base element for a temporary sports field or this disclosure will also be referred to as a module.

FIG. 1 shows in cross section schematically part of a sports field structure, including a base element with a deck and pillars, membrane and top layer, placed on a substructure;

FIG. 1A a connection between a pillar and a wick element or wick material inside such a pillar and a cover in a structure according to the disclosure;

FIG. 2 shows in cross section schematically a series of sports fields structures, interconnected and forming a sports field area;

FIG. 3 shows in cross section schematically an alternative embodiment of a sports field structure, comprising the base element comprises or is formed as a substantial box shaped module with an internal volume for retaining water and / or allowing water and / or air flow;

FIG. 4 shows schematically in top view a base element, in a first embodiment;

FIG. 5 shows schematically in top view a base element, in a second embodiment;

FIG. 6 shows schematically in top view a series or modules interconnected;

FIG. 6A shows schematically a connecting element with an opening;

FIG. 7 shows schematically a detail of the membrane or top layer locked by a locking element;

FIG. 8 shows in top view part of a sports field;

FIG. 9 shows schematically in perspective view part of a temporary sports field placed on a substructure including or formed by an existing sports field;

FIG. 10 shows a sports field similar to that or Fig. 9, in an alternative embodiment;

FIG. 11 shows in perspective view a module for use in a sports field of disclosure;

FIG. 12 shows in partial cross section schematically part of a sports field according to the disclosure, in a further alternative embodiment;

FIG. 13 - 15 part of an embodiment with a plug; and

FIG. 16A and B of a disaster leading up to the field.

In this description of the invention will be described with reference to the drawings by way of example only. These terms should be understood as limiting the scope of the disclosure. At least all combinations of elements and features of the exponents are also considered to have been disclosed. In this description the same or similar elements and features will be referred to by the same or similar reference signs.

In this description, expressions of orientation such as top, bottom, vertical, etc. are used for convenience only and refer to the orientation of the module as seen in the accompanying drawings. Such expressions are not considered as limiting the orientation of the module in use, and indeed, as will described below, modules according to the description can be used in other orientations, including at least at sloping surfaces.

In this description a temporary sports field should be understood as at least meaning that a sports field has been created which can be used for a period of time, such as a predetermined period of time which may be relatively short, where after the sports field is dismantled again or after which a cover layer of the field is partly or entirely replaced by a different layer, for example for a different sport or other activity. Again such a cover can be replaced after another period or time by another cover, which may be the previously removed cover.

In this description a cover should be understood as meaning at least 10 a layer or a set of layers or one or more materials, providing a surface for forming a sports field. Such a cover may comprise or be formed by a cover layer. Such a cover may include a top layer providing such a surface or may include a top layer and a cover layer on such a top layer. Moreover, such a cover may comprise a layer or membrane on a substructure. A surface of the cover can be a surface for performing sports on. In preferred, the sports layer is formed by or comprises natural grass.

In this description a cover layer or a surface of the cover layer or sports layer has been understood as least meaningful any material or mixture or combination of materials and / or elements or structures, partly or entirely natural, suitable as a surface for sports , such as but not limited to soccer, American football, Australian rules football and rugby league and union. A top layer is in preferred embodiment formed primarily as a natural grass pitch with at least a root growing layer or root zone and a grass zone, whereas a peat layer may be provided, such as a reinforced turf layer. Alternatively the peat layer can be non-reinforced peat, for example a layer cut to an appropriate thickness. Alternative the sports layer can be formed by an artificial layer, for example or artificial grass, or a combination of natural and artificial grass.

In this description base structure should be understood as meaning at least meaning, but not limited to, an array or interconnected base elements or modules as will be described for forming a temporary sports field.

In this description a wick element or wick medium is understood as at least including any material or element suitable for transporting fluid, especially water from a void below the top layer to the top layer, preferably by least capillary action. The transport may preferably be achieved passively, i.e. without the necessity of a pump or such mechanically means for transporting the fluid from said void to the top layer. Suitable wick mediums for example be but are not limited to soil, mixtures of soil and fibers and / or pellets, artificial or natural fiber materials such as but not limited to glass, stone or rock wool, coconut fibers or the like, cotton or other fiber material. In this description a substructure has been understood as any surface on which modules according to the description can be placed and supported temporarily, either directly or indirectly, such as but not limited to sports fields or such sports areas.

In this description membrane has been understood as including but not limited to any child or woven or non woven sheet or foil, made of any plastic or natural material or mix of materials, including but not limited to plastic sheet or foil, natural fibers, geo-textiles, water permeable and / or water impermeable materials and the like. Preferably a membrane will be flexible, such that it can be placed from a roll or as relatively large sheets, compared to the sizes of the modules to be described. However, the membrane can also be provided in different ways, for example as tiles or as in situ coating.

FIG. 1 and 2 show schematically in a cross sectional side view of a temporary sports field structure 1 according to this disclosure, in a first edition, including a base element 10 including a deck 12 forming a top wall, and can be provided with side walls or a peripheral side wall 16 extending down from a peripheral edge 14 or the deck 12. The deck is carried by a series of pillars 18 extending from the deck 12 downward. The base elements or modules 10 are positioned on a substructure 2, formed by or at least including a sports field or such sports area, for example made of natural grass. Lower ends 20 of the pillars 18 and / or the lower ends 19 of the wall or walls 16 rest on the substructure 2 or a layer 3 provided thereon. Preferably both the wall 16 and at least a number of and more preferably all pillars 18 support the module 10 on the substructure, such that a more even distribution of forces between the deck 12 and the substructure 2 has been obtained. A cover 13 is carried on the deck 12, providing a surface 41 A forming a sports field or part thereafter, as will be discussed hereafter. Preferably the bottom side of the module is at least partly open, for example for allowing air, water and / or light to pass and / or from the substructure 2.

FIG. 1A shows at an enlarged scale part or a cross section. As can be seen in this section a cover 13 is provided on the deck 12 which is shown as including a top layer of natural grass 41A, with a root zone in or formed by layer 41. As will be described watering and / or aeration of the root zone can be acquired at least in part through the modules 10. The cover is preferably provided in a manner that it can easily be placed and removed.

To this end for example rolls or tiles or grass can be placed on the modules, rolled out or placed in a desired pattern. Such grass is well known in the art, for example as described US4916855 and for example but not limited to grass or turf offered under the brand Xtragrass® or as Eclipse Peat, Hero Peat, Palau Peat or Mixto Peat. Many other solutions are however suitable for use in the present invention. Combined artificial and natural grass layers are also known, for example from US6173528, which layers can also be used as or in a cover 13 of the present invention. Without being limited to such species, by way of example grass species that can be used in a system of the present disclosure can be any warm and cool season grass species used for typical sports pitch applications such as; but not limited to perennial ryegrass, zoysia, Bermuda grass and the like. The rolls or tiles can be reinforced, for example by netting extending in and / or above and / or below the root zone, which will aid in keeping the grass together, both during placement and / or removal and during use as a sports surface. During use the modules 10 will keep the cover 13 spaced apart from the underlying substructure 2. The intermediate space can be used for example for drainage, watering and / or aeration of the cover 13, especially of the root zone and grass layer 41 if applicable . At the same time the intermediate space can be used for maintaining a healthy substructure, which is especially relevant if the temporary sports field is placed on an existing natural grass pitch. If desired lighting can be provided in said space.

Module 10 shows largely open at a bottom side 22. On the substructure 2 a membrane or layer 3 can be provided, such as for example a sheet of fabric or plastic foil or any other suitable membrane. Such a layer can be a geo-textile for example. In terms of the layer can be a water impermeable layer, preventing water from flowing out of the modules into the substructure or vice versa or at least limiting the amount of water to flow into the substructure 2, for example in order to prevent over-saturation or the substructure. Which is especially important if the substructure is a natural grass pitch.

As can be seen in -the drawings at least some of the pillars 18, which can also be referred to as columns, can have a substantially open top end 24 in the deck 12. Shown in the embodiment it can be seen that the pillars 18 as such can be hollow and can form a substantially open channel 26 between the open top end 24 and the lower end 20. As will be described some or all of the pillars 18 can be filled partly or entirely with a wick material 38B or wick element 39 and / or can have a closed lower end. Alternatively the pillars can be empty.

18 can have any suitable cross section perpendicular to their longitudinal axis Zp, for example but not limited to a circular, square, rectangular or polygonal cross section. The cross section can be substantially the same over the longitudinal length of the pillar, seen along the axis Zp, but the cross section can also vary. The pillar can be partly or entirely conical, for example such that it has a draft suitable for injection molding or a stronger draft. Suitable shapes and dimensions will be immediately apparent to the skilled person. The modules 10 are preferably made integrally, including the pillars 18, deck 12 and walls 16, for example by injection molding. Alternatively they can be assembled from different parts.

The pillars 18 can be provided with one or more opening 28 extending through the wall 30 of the pillar 18, connecting the channel 26 with an internal volume V or the module 10. In this edition the internal volume V is enclosed between the deck 12, the side wall or side walls 16 and the substructure 2, between the pillars 18. In the embodiment shown in fig. 1, 2 and 3 the opening 28 are provided near or at the lower ends 20, close to or directly adjacent the substructure 2 However opening 28 can be provided in any suitable position, for example at different longitudinal positions between the lower and top ends 20, 24. Similar opening 28A can be provided in the side wall or peripheral wall 16. Such additional opening 28A can also be provided at different positions along the wall or walls 16, for example at different heights.

Figures 1 and 2 show schematically a volume or body of water 32 in the internal volume V of the module 10. The substructure 2 and / or the layer 3 can at least partly close off the open bottom side 22 of the module 10 , such that a body of water 32 can be retained inside the internal volume V for at least a short and preferably an extended period of time. In such alternative the internal volumes V or adjacent modules can be in communication with each other, for example through opening 28A in the walls 16, such that these internal volumes V effectively form an integrated internal volume. This can be beneficial for a desired distribution of water through an array or such modules, as will be explained. By specific positioning the opening 28A can act as weirs, defining a water level in a module before water can flow over to an adjacent module 10 through such opening 28A. The bottom of the modules 10 and / or the membrane 3 can be made such that over time part of the water can flow into the substructure, for watering natural grass or said substructure, maintaining it’s health. As will understood from for example fig. 12 in various two or more layers of such modules can be provided, one on top of the other, these layers can be separated from each other by a membrane, especially a substantial water tight membrane 3A , such that for example water can be retained in an upper one or said layers, and air can pass through a lower one or said layers. In variant the modules can be placed directly on the substructure, i.e. without a membrane 3.

As can be seen in for example fig. 1, 2, 3 and 8 a cover 13 can be provided on the modules. To that end a layer 34 can be placed on top of the deck 12, covering the deck 12 at least partly and preferably substantially entirely. Initially the layer 34 may be a closed sheet or foil covering the entire deck 12. The layer can for example be made of or with fabric, and can be resilient. The layer 34 can be an artificial layer made of a flexible plastic or rubber material. The layer 34 can for example be a layer as ordinarily used in known sports fields directly below a cover layer. The layer 34 can be referred to and / or formed as or comprise a membrane. In variant the layer 34 can be or include a shock absorbing layer. In vary the layer 34 can be folded and / or wrapped around at least a series or array of interconnected modules 10, for increasing the structural soundness of the layer or interconnected modules 10.

As can be seen in fig. 7 above the pillar 18 which is shown empty for clarity sake, a slit or cut out 36 has been provided in the layer 34, directly over the open end 24 or said column 18. Similar slits or cut outs 36 have been provided for other pillars 18, forming an open connection between an upper side of the layer 34 and the channel 26 in the respective pillars 18.

The slits or cut-outs 36 can be made in situ, that is when placing the layer 34 over the module or array or modules 10, for example by cutting, tearing, drilling or otherwise providing the opening in the layer 34 into the or each respective pillar 18. The advantage can be that the cut-outs or slits can be provided in positions where they are desired. Alternative the slits or cut-outs 36 can be provided pre-fabricated in the layer 34. The layer can for example be a perforated sheet or foil, with opening 36 arranged in a pattern, at least in part corresponding with the pattern of the open ends 24 or at least a number of the pillars 18 of the modules 10. Alternatively the layer can be a water permeable layer without such cut outs or slits.

As is for example shown in fig. 1, 2 and 3 on the layer 34 at least one top layer 38 is or can be provided, covering the layer 34 and thus the modules 10. In the channels 26 or at least a number of the pillars 18 an amount of a wick medium 38B can be provided, forming a wick element 39, which can be directly or indirectly in communication with the top layer 38 on the layer 34 through the open ends 24. In edition material of the layer 34 and / or the top layer can be the same as wick medium 38B inside the channels 26. In other variables they can be different in for example material, consistency, compactness or other such aspects. Alternatively some or all of the pillars may be empty.

In variant the top layer 38 can be provided on top of the membrane 34 or directly on the deck 12, if no such layer 34 is provided, and can be provided as an integral layer such as a grass mat, can be provided as segments or can be loose material, or combinations thereof. In vary the top layer 38 can be composed or be formed by a layer 38 or a water regulating material, as is known in the art of natural grass sports fields. In preferred variant the layer 38 is provided with a layer 41 of natural grass, which is rooted in the layer 38 such that the grass can be watered by feeding water through the layer 38, for example water fed from the internal volume V of the modules 10.

In vary the layer 38 can contain a natural material such as for example sand or clay, mixed with fibers 38C, such as but not limited to natural or artificial fibers such as for example glasswool or rockwool fibers, cotton or such fabric fibers or the like . The fibers can have different effects in the layer 38, either one of these effects or some or all in combination. The fibers 38C can aid in providing a consistency and stability of the layer 38. The fibers 38C can aid in water retention and / or distribution through the layer 38 for example by capillary action. The fibers 38C can aid in transportation or water through the layer, from the pillars 18 to and / or through the top layer and / or vice versa. The fibers 38C can aid in specific distribution and retention of water over the field. For example by providing more fibers 38C in a specific area than in an other area the area with a higher fiber concentration may receive more water from the structure and / or prevent more water flowing back into the structure, which may lead to a higher evaporation in such area than in other areas with a lower fiber concentration. As discussed, additional to or in stead or such fibers also netting or similar reinforcement can be provided in the cover 13.

As can be seen in the drawings, wick medium 38B and / or wick element 39 if present in the pillars 18 can be in contact with the volume of water 32 inside the modules 10 through the opening or opening 28, as well as with the top layer 38 on top of the layer 34 or deck 12. Thus water will be transported from the volume of water 32 to the medium 38 on top of the layer 34 through the wick medium 38B or element 39 inside the channels 26. This will preferably be a natural transport such that any water is removed from the top layer 38, for example by evaporation, drainage or otherwise, can be replenished from the volume of water 32 in a suitable pace. This pace can for example be influenced by the number of and distribution of the pillars 18 filled with the wick medium or element 39 or more in general the number and distribution of wick elements, the amount and type of wick medium inside the pillars, the longitudinal depth to which extend the channel (s) is or are filled and the size and distribution of the opening 28 and the hygroscopic properties of the materials, especially the top layer 38 and possibly the layer 34, if any. Moreover it can be influenced for example by water temperature, air flow and the like in and / or through the modules 10.

In a sports field or structure according to the invention preferably at least part of the structure and / or top layer and / or membrane is covered by a layer 41 forming a surface 41D for performing sports on, as described. Preferred expat the top layer 38 and / or layer 41 can be formed by or include a natural grass layer 41A, which forms the surface 41D for performing sports on. In cover the top layer 38 can be embedded in part or entirely, the cover layer 41 being placed directly on top of the deck 12 or layer 34.

In Fig. 2 by way of example a system is shown for regulating the water level inside the internal volume V. At the right hand side a storage tank 100 is shown, connected to the volume V by a first line 101, including a pump 102 , and a second line 103, having an inlet 104 in connection with the volume V. The inlet 103 preferably comprises or is formed by a settable end, such that the inlet can form an overflow at a desired level of water inside the volume V, thus acting basically as a weir. Any water entering into the volume V, for example due to rain, will raise the water level inside the volume V. If said level rises above a set, desired level, water will flow through the inlet 103 and second line 102 into the tank 100 If the level of water sinks below the desired level water can be supplied from the tank 100 through the first line 101 and the pump 102. A suitable water level sensing unit can be provided in a known manner, for example a float, syphon or the like. Such systems are well known in the art. At the left hand side a water mains 105 is shown, connected to the volume V. Should at any time the water level inside the volume V get below a desired level, water can be supplied through the water mains, regulated by a valve 106. For example when there is an insufficient amount of water in the tank 100.

By regulating the water level in the volume V, the hydration of the layers 34, 38 and / or 41 can be regulated and thus watering of the grass can be obtained, as well as drainage. Moreover for example evaporation and thus cooling and / or heating of the field can be regulated, if desired. As shown schematically in Figure 1A by arrows W, water can be transported up from the volume V through the material 38B or element 39, preferably at least by capillary action, and / or by evaporation from the volume V and into the cover 13 , especially the top layer 38, to be distributed through the cover 13. Then the water may migrate up further, to the surface 41D and evaporate due to the heat of the surface 41D and / or air above it, wind or the like. Obviously water can also be transported in the opposite direction. If fibers 38C are provided in the cover 13, they may aid in transport and distribution of water.

As can be seen in Fig. 8 during use water transported from the voids in the modules may be transported by the wick elements 39 and / or wick medium 38B to the top layer 38 and will be distributed in and / or over said top layer and / or cover layer 41 over an area 40 surrounding an upper end of said wick element or a pillar or channel in which such wick element is provided or formed by wick medium. For example by evaporation and / or by backflow into the voids the water will then retract heat from the cover layer 41. Alternatively water may be supplied in this manner in order to warm the top layer 38 and / or cover layer 41, for example during cold periods. To this end the water could be heated, either inside the voids in the modules, or externally to the modules, for example in the tank 100. Moreover, since the water level inside the volume V can be regulated, an air space can be provided and / or maintained above the water, which air may be used for further cooling and / or heating of the top layer, and / or for ventilation thereof. Importantly for a temporary sports field according to the invention having a natural grass surface, water distribution can be obtained through the root zone of the grass without having to spray the field, or at least reducing the necessity.

The deck 12 can be provided with additional opening 42 5 extending into the internal volume V. These opening 42 can be covered by the layer 34, such that the top layer 38 cannot pass into and through the opening 42. Alternatively or additionally the top layer 38 can be sufficiently coherent in itself not to pass into or through such an opening. In Figs. 4 - 6 of the modules 10 are shown in top view, showing open ends 24 or pillars 18 and opening 42. The layer 34 can be water permeable, such that water can pass from the top layer 38 through the layer 34 and the opening 42 into the internal volume V or the modules 10, to be retained therein or to flow away. This can for example prevent the top layer or layers from becoming saturated or even over saturated with water.

Moreover, this allows the volume V to be filled with water from above, for example by rain or irrigation. Additionally or alternatively water from the internal volume can evaporate through the opening 42 and be absorbed by the fabric and / or the growing medium 38. Alternatively the structure can be used as a tidal system, by filling the modules by providing a flow of water through the modules, such that the water level rises, for example to a level close to or in the opening 42, and then draining the water again. The layer 34 can be water impermeable, closing off the opening 42, which can for example be advantageous when evaporation of water from the internal volume V should be limited or prevented, for example when the modules 10 are used in relatively hot environments, such as but not limited to tropical or semi-tropical environments. The layer 34 can be air permeable, such that air can enter into the top layer 38 from below, for example through the opening 42, in order to aerate the top layer 38 and especially a root zone of the grass and / or to cool and / or heat the top layer by cool or warm air blown through the modules. A natural or forced air flow could be provided through the modules 10 to promote such aeration or temperature regulation.

In example 2 and 6 a series of modules 10 is shown, interconnected in a suitable way, for forming a larger area or a sports field

1. The interconnection is provided for by interconnecting elements 50 as will be discussed. These elements 50 can also be referred to as locking elements. They are retractable from channels in the modules, such that the modules can be disconnected after a period of time, for later in the same or a different area. Preferably the elements 50 are provided with an engagement element such as an opening 50A, notch or ridge or the like, for engaging with a retraction tool, such as an appropriately shaped hook, plyers or the like, for retracting the elements. An embodiment of such element 50 with an opening 50A is schematically shown in Fig. 6A.

The decks of the modules 10 preferably form a flat and / or continuous surface area, and are covered by the layer 34 extending over the series of modules. The modules can be arranged in a matrix or rows and columns, as is shown for example in the top view in fig. 6 showing four modules 10, covering any size and / or shape area. As discussed the internal volume V can be a continuous volume throughout the area or part thereof.

Alternative modules 10 could be provided with closed peripheral walls, that is free or opening 28A or such opening blocked, such that some or all of the modules have their own closed internal volume V. In general wick elements 39 and / or medium 38B in the channel or channels 26 can lead to wetting of the top layer 38 in a substantial circular area around the relevant opening 24. By strategic filling of some channels 26 and leaving others empty or partly empty a specific desired wetting pattern of the top layer can be obtained , as shown for example in Fig. 8. The modules 10 are preferably interconnected such that they form a relatively stiff, raft-like structure for a desirable distribution of loads over the underlying area. The membrane 34 can be wrapped around some or all of the modules 10, further improving their stability and load bearing capability.

In vary the structure formed by the modules 10 can be divided up into different compartments, each compartment including one or more coupled modules 10 having a combined internal volume V _n , separated from the internal volume V _n + i or the or each other compartment. Each compartment can be provided with a series of wick elements or columns filled with wick material, with the number or distribution of such elements or filled columns can vary between compartments, and / or with the wick material and / or capillary capacity can vary between the different compartments. Additionally or alternatively the different compartments can be arranged to have the water level and / or water temperature in each compartment set independently from the water level and / or temperature in adjacent compartments. In such different different areas of the sports field 1 can be treated differently, for example by having the layers 34, 38 and / or 41 wetter, dryer, warmer or cooler than adjacent areas, providing for more evaporation in areas than in other areas, or providing similar differences. In such different communications between different compartments may be impossible or may be possible for exchange of water and / or air. In case such communications are possible between compartments such communication may be regulated by example valves, preferably such an operator can actively set such communication.

In for example Figs. 3, 11 and 13 schematically illustrated or parts are shown, the modules or base elements are generally box shaped. In general this can be understood as that the module 10 is comparable to that as the example shown in fig. 1, but is provided at the bottom side 22 with a bottom 12B. This could be a bottom element attached to the bottom 22 of the module 10 as disclosed and discussed with reference to fig. 1 and 2. In the illustrated 10 the module 10 can be formed by connecting two module parts 10A, 10B over a connecting area 44 indicated by the line 44A. This connection can be made in any suitable way, either permanently or reversibly. The connection can for example be made by welding, gluing, clicking, screwing or any other suitable way known to the person skilled in the art. Each part 10A, B can comprise a part of a side or peripheral wall 16 and part of the pillars 18. The lower part 10B can contain a bottom 12B, similar to the deck 12, such that the module can be placed on the substructure supported at least largely by the bottom 12B.

In internally the module 10 can contain pillars 18 extending vertically between the deck and bottom 12, 12B which can aid in resisting vertical deformation or crushing of the module 10. In execution the module 10 can be assembled from two substantially identical integral components 10A, 10B molded from a rigid plastic material and which are fitted one inverted on top of the other. Each pillar 18 thus comprises two half-pillars or male and female parts 18A, 18B respectively, one part being integral with one component 10A or 10B and the other part being integral with the other component 10A or 10B. In different male parts 18A can alternate with female parts 18B in each component 10A and 10B such that when the two components are fitted together the male parts 18A or each component enter the respective female parts 18B or the other component to form the complete pillars 18. To avoid over insertion of the male parts into the female parts, and to maintain the top and bottom walls 12 and 14 at their correct separation, each male part can for example include a shoulder 18C which abuts against the open end 18D of the respective female part when the components 10A and 10B are fully engaged, as is for example schematically shown in fig. 7.

As shown in Fig. 4 the deck 12 and, if applicable, the bottom 12A or a module 10 can be formed by a substantially closed plane including the opening 42 and open ends 24 of the pillars 18. In this edition the opening 42 have a substantially square cross section, but they can have any cross section desired, such as but not limited to round, oblong, polygonal or the like.

In Figs. 5 and 13, the alternative is shown, the deck 12 and, if applicable, the bottom 12A can be formed substantially open. The deck 12 and / or bottom 12A can be formed substantially by a structure of intersecting ribs 46A, B extending between at least open ends 24 or pillars 18 and between open ends 24 or pillars and side walls 16 of the base element 10, and / or between other ribs.

In embodiment the bottom 12B can be according to fig. 4 and the deck 12 could be according to fig. 5 or vice versa.

As can be seen in fig. 4, 5, 6 and 13 the modules 10 can be provided with side wall channels 48, extending over part or all of the height of the module 10 or a module part 10A, B, which can have a cross section non-releasing in the direction of the relevant side 16 of the module, ie in directions parallel to the deck 12. In the embodiment shown the side wall channels 48 have a substantially dove tail shape cross section. When two modules are appropriately placed next to each other, side walls 16 facing and abutting, at least two such side wall channels 48 will be adjacent to each other and open to each other, forming a substantial bow tie or butterfly shaped joined channel. A locking element 50 having a shape complementary to the joined channels 48, as shown for example in Fig. 6A, can be press fit into said joined channels 48, locking the modules to each other. As can be seen several such channels 48 can be provided on all sides of the modules 10, assuring a very firm connection between all modules. Obviously other such locking elements 50 and complementary channels 48 could be provided or other means for coupling the modules. As discussed, the elements are preferably at least in part retractable from the channels 48, for disassembling the structure.

The modules 10 can contain a network of bracing members to resist geometric deformation or the module in a horizontal plane and / or in vertical direction. 46A, B as shown in fig. 5 or 13 - 15 and / or extend in a pattern as shown in fig. 5 or 13 - 15, and can be internal within the internal volume of the module, for example below a deck 12 as shown in fig. 4. The ribs 46A can for example extend parallel to a side wall or diagonally between pillars 18 and can include or form vertical webs having apertures to allow fluid flow horizontally through the module 10 in any direction. The webs can be vertically oriented such that they do not obstruct fluid flow in the vertical direction. Each rib and / or web can be formed of upper and lower halves integral with upper and lower components 10A, 1OB respectively, and can have facing non-straight or at least not completely connecting edges, such as for example concave or wavy edges defining apertures between them. In different ways the edges can be parabolic. Between the ribs 46A and / or webs further ribs 46B can be provided, which can also be form or include webs extending into the inner volume V and can serve to break down voids within the volume V. As viewed from above in fig. 5 or 13 - 15, they can extend substantially normally between the bracing ribs 46A and supplement the bracing effect of the latter. 46A, B can for example be a few millimeters thick, for example about 5 mm thick and can extend downward or upward from the deck 12 or bottom 12B in a direction normal to the deck 12 a few millimeters to several centimeters and can bridge about all of the internal height of the module.

Figure 7 shows schematically in enlarged scale part of a module 10 with a deck 12 covered by layer 34, with part of a cross section of a pillar 18 showing the wall 30 and a joining between two pillar halves 18A, B with shoulders 18C, D. In this embodiment the layer 34 is connected to the module 10 by press fitting a locking element 52 into the open end 24 or a pillar 18, through a cut out or slit 36 in said fabric 34, such that part of the layer 34, especially an edge portion 34A or the cut-out opening or slit 36 is forced into the channel 26 or the pillar 18 and is locked between the locking element 52 and the wall 30 of the pillar 18 and / or an edge portion or the deck 12 at the opening 24. In the embodiment shown the locking element is shown, by way of example only, as a ring shaped element 52, including a slightly conical shape, with a peripheral snap ring 54 extending outward, which can snap into a peripheral groove 56 provided in the wall 30 of the pillar 18 just below the de ck 12. Thus pressing the ring with the narrower end of the ring 52 forward into the opening 24, the layer edge 34A is forced over the groove 56 where after the snap ring 54 is pressed into said groove, forcing the layer into the groove 56 too. This will lock the ring 52 by form lock into the opening 24. It will be clear that all kind of alternative locking provisions can be provided for locking the layer and / or a locking element in said opening 24, such as but not limited to press fitting under friction, snap fitting the ring under an undercut edge of the deck, matching, preferably coarse screw threads or bayonet elements on ring 52 and opening 24, or by example adhesion. Into the locking elements 52 can be designed to form the opening referred to as a slit or cut-out 36 in the layer 34 in situ, during insertion into the opening 24. By using such locking elements the layer 34 can be provided secure and preferably relatively taut over the deck 12 without the need to provide additional opening in the layer 34 or for example adhesives. The locking member 52 is preferably provided reieasabiy, such that they can be removed after use, for disassembling the structure. Alternatively the deck 12 can be provided with one or more slits into which an edge of the layer 34 can be inserted and clamped. Such a slit can be substantially triangular, such that the edge can be pulled tight into the tight end of the slit.

In inserted the membrane or layer 34 can be locked in place by wick elements 39 inserted into the columns 18

In varying the locking element can include supporting elements such as for example a cross of beams or the like, in use extending over the opening of the channel 28, supporting the top layer and preventing it from bending into said opening. Thus the flatness or the top layer can be better ensured.

As discussed before, the layer 34 could also be omitted, placing the top layer 38 for example directly on the modules, or the layer 34 can be part of the top layer. Also instead of the layer 34 the top layer 38 could be connected to the modules, for example in the disclosed locking manner or a similar manner. In cover the cover layer 41 can be placed directly on the deck, leaving out or integrating the top layer 38 and / or the membrane 34.

The channel 26 can be provided with one or more restrictions, such as but not limited to flanges or ridges extending into the channel 26 from the wall 30, such that the wick medium is prevented from or at least restricted in falling further down the channel towards the end 20 thereof. In Fig. 7 such a restriction is shown as a flange 60 extending from near the end 20A or shoulder 18C or the pillar half 18A, inward into the channel, leaving only an opening 62 in the channel with a cross section narrower than the cross section or 26. Such restrictions can be provided in different or several positions, and could for example be formed by ribs 64 extending substantially parallel to the longitudinal axis too, as schematically shown by dashed lines in Fig. 7, in a direction of release or the pillar in a manufacturing mold. The restrictions can limit the depth into which the wick medium can be inserted and prevent it from being pushed further due to example gravity, vibrations or impact pulses.

In general modules can be used as disclosed as structural modules in for example W00214608, W02011 / 007128 or W02011 / 007127, or as discussed in the non-prepublished Dutch patent application NL2016344, all of which are considered to have been incorporated in their entirety , as far as the detailed description and the drawings are concerned. FIGs. 13 25 disclose part of a module as discussed and claimed in NL2016344, including a plug 200 inserted into the deck, between ribs.

Fig. 8 a series of modules 10 forming a surface structure is shown, from above, schematically showing a pattern of legaled circles 44 or the top layer 38 surrounding opening or wick elements 39. In Fig. 8, by way of example, schematically a side line 45 is shown, separating a playing area 46 of the field from a side area 48. By way of example the legal circles well in the playing area 46 are slightly larger than near and in the side area 47, for example by providing less wick material in the side area 48. Preferably the wick elements 39 or wick material 38B is provided in a regular pattern, depending on the desired wetting and evaporation, cooling and / or draining or a sports field area.

In the case of the deck of the modules you can be substantially closed, except for the open ends 24 of the pillars or at least some of the pillars. Substantially closed should be understood as including having opening so small that the top layer can be supported on top of the deck without bulging into this small opening. In this this can be achieved by closing off opening in the deck by for example plugs, members or such elements and / or a membrane 34.

According to the disclosure a sports field surface structure or area can be formed by placing a series of modules 10 on an existing sports field, such as a sports field made of natural grass or artificial grass. The modules 10 are coupled in rows and / or columns using the elements 50. Said modules 10 can include a deck 8 and columns 18 opening into said deck 8. A series of said columns 18 can be filled at least partly with a wick medium 38B or wick elements 39, or all columns 18 can be left empty. On top of the modules 10 a cover 13 is provided, for example including a layer 38. This may be in fluid connection with a wick medium 38B or element 39 in the or each column 18 filled at least partly with said wick medium 38B or element 39. Water is provided or retained in said modules 10 for hydration of the top layer 38 on top of the modules, by evaporation and / or through the wick medium 38B or element 39 in said columns 18 and / or for draining water from cover 13 on top of said modules 10. To this end for example water can be flushed into and / or from said coupled modules, for example from a side of a series of modules. In water can be provided from the top, for example by rain and / or sprinklers or such artificial raining devices and / or by a tidal system, part of the water can be retained inside the modules for later use. In water conditions conduits can be provided in the cover 13 for feeding water to the layer or layers on the modules. In water can be provided from a tank 100 and / or a mains 105.

The water can be used for hydration of the natural grass of the layer 41. Preferably the amount of water fed to different parts of the filed can be regulated, for example in compartments of the structure 1, such that the hydration of different parts of the field can be regulated differently during for example a day.

Water contained in layer 34, top layer 38 and / or cover layer 41 can evaporate from the cover layer 41, as symbolically shown in Figs. 1A and 2 by arrows 47, cooling the surface of the cover layer 41. By providing more or less water in the layers 34, 38 and / or 41 the evaporation can be regulated, such that the temperature of the surface of the cover can be regulated at all times, to a high degree relatively independent from for example air temperature above the surface, radiation by the sun, shadow and the like factors external to the field structure. For example for a field in a stage a part of the field directly in the sun can be cooled more intensive than a part of the field in the shadow of the stage, which may change during a day. Thus for example in the morning a first part of the field may be cooled more intensively by providing more water to evaporate than another part of the field, whereas later in the day the same first part of the field may experience the shadow of the stadium and will then be cooled less, whereas the other part may have been cooled more intensive because of it becoming exposed to direct sun light. Thus the temperature of the surface of the cover layer 41 and thus of the field can be kept within limits and temperature differences over the field can also be kept minimal.

Sports field structures according to the disclosure can have the advantage that loads and forces provided on top are distributed over relatively large areas, allowing higher loads and forces without becoming unlevel or uneven. An area of the disclosure can provide for suitable and substantially constant supply of water without risk or over saturation and without necessity or mechanical means for irrigation. A sports field area according to the disclosure can have the advantage that an underlying sports field can be protected from for example damage due to intensive sports performances or from too much rain, without the risk that natural grass or such pitch will be harmed. A sports area according to the disclosure can have the advantage that the base element or module can provide for flexibility and / or damping for example people on the temporary sports fields. Sports fields according to the disclosure can have the advantage that they can be formed quickly and allows for optimization of cooling and / or heating. Sports field structures according to the description can have the advantage that local wetting can be optimized, for example by adaptation of the distribution of channels filled with wick medium and / or adaptation of the wick medium in said channels.

In a sports field or sports field area according to the present disclosure a water balance can be provided between one or more storage tanks 100, the capillary system of wick elements or material 38B in the pillars and the top layer 34, 38 and the sports surface , and / or an air layer within the volume V. A surplus of water, for example due to rain can be transported into the volume V through the layer 38 and wick material or elements 38B, and if necessary into a tank 100 or can be discarded, whereas when the layer 38 is drying, for example due to evaporation of water, water can be replenished again.

In the present invention a water supply 60 can be provided, for example connecting a water storage 100 and / or a water mains 105 to the one, some or all of the voids in the base structure. A pump 102 or such forcing means can be provided in a feed and / or return line 101, 103 such that water can be forced into and / or forced out of said void or voids. Thus the water level in and / or flow or water in and / or through the void or voids can be controlled. Moreover, a cooling and / or heating device 64 could be provided for cooling and / or heating water used in said sports field structure.

FIG. 9 and 10 schematically show part of a sports field 1 according to the disclosure, in perspective, cross sectional view. FIG. 9 shows such a field without a shock pad, fig. 10 with a shock pad. Further they can be substantially identical.

In Fig. 9 and 10 the temporary sports field is shown formed on top of a pitch or sports field formed by a synthetic pitch 2. This can have a standard construction known in the art, for example a mat or artificial grass supported by a sub structure providing drainage and support. This shall not be further discussed. In alternative alternative the temporary sports field can be provided on a natural grass pitch as substructure.

9 and 10, modules and structures can be used as discussed here before for forming a temporary sports field. On the existing pitch 2 a membrane 3 can be placed, such as for example a geo grid or geo textile, which may be impervious to water, especially if it is placed on an artificial pitch, or may be permeable or semi permeable, for controlled transfer of water into the pitch 2. On the membrane 3 a layer of interconnected modules 10 is formed, together forming a continuous deck 12 and communicating voids V. On the deck 12 a cover layer 34 is provided, formed in this edition by a membrane , such as a geo textile, which can be reinforced by a webbing, and which can be permeable to water or can be impermeable. On top of the membrane 34 the further cover 13 is formed, by a peat layer 38 including or topped by a layer of natural grass having a root zone in or formed by said peat layer 38. The peat 38 layer can be a reinforced layer, for example reinforced by webbing or netting embedded in the layer, especially in or close to a root zone. The peat layer 38 can alternatively be a non-reinforced layer. The peat layer can for example have a thickness cut between 20 and 100 mm, for example between 25 and 90 mm, such as for example between 30 and 75 mm. The layer 41 is in communication with the void or voids V in any suitable manner as discussed here before, such that water can flow into the voids passing through the cover 13 and water can hydrate the cover 13 and, especially, the root zone of the layer 41 of natural grass, in order to provide the necessary moisture for growth and health of the grass. The peat layer 38, including the layer 41 of grass, is placed on the deck of the modules or base elements forming a base structure, ie on the membrane placed thereon for example as tiles or side by side longitudinal strips which can be unrolled for example from rolls which can be prepared and / or stored in a different area prior to use for the sports field and / or at or after dismantling the temporary sports field.

In Fig. 9 the layer 38 is placed directly on the membrane 34. In Fig. 10 a shock pad 35 is positioned between the said layer 38 and the membrane 34, in order to equally better absorb shocks from for example players on the field.

By way of example only, without limiting the disclosure, a base structure formed of such modules or base elements 10 can have a height of example between 40 and 120 mm, for example about 80 mm. Obviously the height can be chosen based on for example a desired volume of voids V, a desired level of the playing field or surface 40, a desired space for circulation or air or any other suitable parameter.

FIG. 11 shows an example of a module 10 having a relatively open structure, formed mainly be ribs 46 extending between pillars or columns 18, as described before.

FIG. 12 shows schematically in side view part of a temporary sports field 1 according to the disclosure, in which the base structure comprises two interposed layers 10A, 10B or modules 10 as described. A first, lower layer 10A is placed on the substructure 2, in this embodiment directly, without an intermediate membrane, such that air can easily reach the substructure, without having to pass from the voids or the lower layer 10A though such membrane. On the first layer 10A a membrane 3A is placed, preferably substantially water tight, covering the lower layer 10A.

On said membrane 3A a second, upper layer 10B or modules is formed, such as for example discussed here before, forming a support for a cover including grass, preferably natural grass. In the upper layer again provisions are provided for receiving and preferably retaining a volume of water and for hydrating the cover 13, especially such that water is supplied during use to the surface and a root zone of grass. Such provisions can include example wick elements 39 or wick material 38B, opening in the deck 12 for allowing water and / or water vapor to pass in and / or out of voids from and / or into the cover 13. Again the membrane 3A can be wrapped around part or all of the upper layer.

The membranes 3 and 34 can be formed by a single membrane wrapped around a relevant layer or modules such as the layer 10B. Preferred in side faces or the base structure or layer or modules opening are provided, for allowing circulation or air through the voids, for aeration or the cover 13.

FIG. 13 - 15 schematically show part of a module 10 as described in NL2016344. As can be seen at least the deck 12 or this module or base element 10 is mainly formed by ribs 46 extending between columns 18. In positions between adjacent columns 18 provisions have been created for mounting a plug 200 in said deck 12, between two such ribs 46. The plug 200 can contain a mounting provision, such as screw threads 201 for mounting an artifact to the deck 12, such as or example a goal post, corner flag, fence element, guard or the like. Obviously similarly plugs or other elements could be mounted to other surfaces or the modules or base elements. Alternatively or additionally the mounting provision such as screw threads, bayonet means, friction opening or the like can be provided directly in the modules. The mounting provisions allow direct mounting or artifacts to the base. This may relieve the peat at least partly from the strain of such artifacts.

As can be seen in for example fig. 14 and 15 these modules 10 can have a substantially open bottom side, which leaves a substantial part of the underlying structure or the existing pitch on which they can be placed free to breath and for example receive water , air and / or light if applicable. In modules according to the disclosure, especially in an embodiment according to fig. 12, such as daylight lights can be provided in the base structure, especially in a lower layer 10A as disclosed in fig. 12, for providing light, preferably daylight to the underlying pitch, which may improve the health of the pitch when including natural grass.

FIG. 16 A and B show in top view and in partial cross sectional view respectively a disaster 202 leading up to field 1. This will allow people, animals and / or vehicles such as maintenance vehicles, emergency vehicles and the like to easily access the field 1 which will have a surface 41 which may be several centimeters to several decimeters above the level of the original substructure 2 or field on which the temporary sports field 1 is formed. Moreover or alternatively such a disaster can provide a surface to prevent people, animals and / or vehicles to drop off the edge 204 of the field. The ramp 202 can have an inclined top surface 206. A high side 208 of the ramp 202 can be provided with slots 48, similar or identical to slots 48 in the modules or boxes 10 of the structure, in which connecting elements 50 can be fitted , for connecting the ramp 202 to the modules or boxes 10 or at least to the structure formed therewith, in a manner similar to or identical to that used for interconnecting the modules or boxes. The high side 208 may be provided with a stepped surface 210 at a height Hl above the bottom 212 of the ramp 202. The height Hl may for example be substantially equal to the height H2 of the boxes or modules 10, such that the cover layer or layers, for example including the membrane or membranes, shock pad if applicable and the like can extend beyond an edge 216 of the structure formed by the modules or boxes 10, overlapping and resting on the stepped surface 210, preferably providing for a clean and smooth transition. In such such a disaster 202 can be provided along the entire edge 216 or the structure or field. Alternative such disaster 202 is only provided at one or more specific locations alongside said field or edge. In such otherwise preferably a border or the like is provided along the rest of the edge of the field or structure, in order to prevent people, animals and / or artifacts to drop off the field. Such borders can for example be provided and connected to the structure formed by the boxes or modules 10 in the same or a corresponding way as the disaster 202, using connecting elements 50 as discussed. Obviously such connecting elements 50 can also be provided as elements integral to the ramp 202, borders and / or boxes or modules 10, especially such that half or a connecting element 50 as shown in Fig. 6A is formed as such an integral part, which can then be closed into a corresponding groove 48.

As discussed the temporary sports field according to the disclosure is provided temporarily on a surface area, which may be an existing pitch such as a natural or artificial grass pitch. After a period or time during which the field is used for performing sports, the cover 13, or at least the layer comprising the grass 41 is removed from the base structure and can be stored in a different area, or transported to a different location, for example as rolls or tiles, or may be discarded. The base structure can be disassembled, by disconnecting modules or groups or modules from each other. These modules or groups of modules can then be stored or transported to a different area, for again forming a temporary sports field or for another purpose at the same or a different location. In vary the cover can be removed from the base structure, such that it can be replaced again on the same base structure, form example in between matches, such that the cover or at least the layer of grass can be placed in a growing environment, such as for example a near by field for receiving natural sun light, rain and the like. This can especially be advantageous when the field is positioned indoor or in an environment blocking at least part of natural light, rain, wind and the like, and / or when in between matches the area is used for a different purpose, to which end then temporarily on the deck a different cover can be provided, such as for example but not limited to a hard flooring, for example for a concert, fair or the like. Alternative a different sports cover can be provided on the base structure, such as an artificial grass pitch, as a temporary sports field. As discussed the structure allows easy exchange of covers on the structure formed by the modules 10, while maintaining the advantages of such a structure.

With a sports filed according to the present invention a sports field can be provided, suitable for intense use, temporarily, which is less susceptible to climate influences such as heavy rain or draft, can have a surface suitable for a different sport or for different conditions or intensity than an existing surface and can be easily provided, maintained and removed again, such that afterwards the existing pitch can be used again. Especially if the existing field or pitch is a natural grass pitch damage to the grass may be prevented to a large extend, such that it can be reused again without having to provide for major repairs or even a new pitch surface. Moreover, since the cover can easily be placed and removed, intermediate changes of the cover are possible for other uses, without damage to the original cover, especially a layer of natural grass.

In the otherwise disclosed the wick medium and / or wick element is discussed and disclosed as provided in a column. Alternatively or additionally a wick element and / or wick medium could be provided in a different manner. For example a wick element could be provided as a flexible wick such as a piece of fabric, extending through an opening in the deck and hanging into the void.

The present invention is by no means limited to the specifically disclosed in the drawings and description. Many variations are possible within the scope as defined by the claims. For example all combinations of parts of the figures shown in the drawings are considered to have been disclosed too. Base elements or modules as disclosed can be made by any methods and from different materials. Modules can be coupled in different manners and different ways or can be placed next to each other without coupling. They can be positioned in different orientations relative to each other, for example in a "half-stone", staggered relationship for even more rigid connections. Modules can be stacked for receiving a larger internal volume V in the structure. The modules can have different shapes and dimensions, for example polygonal. Preferably they can be coupled such that they can form a substantial continuous surface area. These and many such variations are considered falling within the scope of the claims.

Claims (3)

Conclusions 1/16 22 39 zpd FIG. 1A A method for providing a temporary sports field, comprising the steps of providing a basic structure over a surface and providing a cover over said basic structure, wherein: The basic structure is formed from basic elements which are interconnected to form the basic structure which defines a deck; - the basic elements comprise an upper side and a lower side and sides which enclose a hollow space, the sides at least 10 are partially open, - the basic elements are mutually connected such that cavities of at least a number of adjacent basic elements are mutually connected by said sides; and wherein the cover comprises at least one layer of natural or Comprises artificial grass which layer is formed on the basic structure from coverings and / or strips; wherein after a period of time the cover of the basic structure is removed and preferably stored and the basic structure is removed from the surface for reuse at the same or a different 20 surface with the same or a different cover. 2/16 A method according to claim 1, wherein said time period is less than one year, preferably less than half a year, more preferably less than four months. 3. Method as claimed in claim 1 or 2, wherein the sports field is provided on a surface formed by a sports field, in particular a sports field made of natural grass, artificial grass and / or artificial peat such as tartan, asphalt or soil. A method according to any one of the preceding claims, wherein a membrane is placed under the basic structure, which covers the surface 5, wherein the membrane is watertight or permeable. A method according to any one of the preceding claims, wherein a membrane is placed on top of the deck, under the cover, wherein the membrane is water-permeable or waterproof. The method of any one of the preceding claims, wherein the hollow 10 spaces of the basic elements are at least partially interconnected for retaining and transporting water through the basic structure, the deck being provided with at least a series of openings through which water passes during use, the water being received in said hollow spaces, said water openings at Are preferably covered with a membrane that is permeable to water but substantially impermeable to soil or peat. A method according to any one of the preceding claims, wherein an air stream is passed through and / or provided for through the cavities of the basic structure. 20 A method according to any one of the preceding claims, wherein a series of wick elements is provided, which extend into the cavities from a position adjacent to or in contact with the cover, such that water in said cavities is transported to said cover by said wick elements. 25 9. Method as claimed in any of the foregoing claims, wherein a shock-absorbing layer is provided on or near a bottom side of the cover, preferably on the deck or on a membrane provided on the deck. Method according to one of the preceding claims, wherein the cover, in particular the coverings and / or strips, are removed from the basic structure and are stored in a storage facility for reuse, while the basic elements are preferably individually or in groups 5 are released from the basic structure for storage and reuse, wherein the covers and / or strips are preferably stored in an air-conditioned environment. A method according to any one of the preceding claims, wherein the cover comprises peat, in particular reinforced or unreinforced peat 10 natural grass that is rolled on and / or placed over said basic structure. A temporary sports field comprising a basic structure over a surface and a cover over said basic structure, wherein: the basic structure comprises basic elements which are interconnected to form the basic structure which defines a deck; - the basic elements comprise an upper side and a lower side and sides which enclose a hollow space, the sides being at least partially open, - the basic elements are mutually connected such that hollow ones Spaces of at least a number of adjacent basic elements are mutually connected by said sides; and - wherein the cover comprises at least a layer of natural or artificial grass which is releasably supported by the basic structure such that after a period of time the cover of the Basic structure can be removed and preferably stored for reuse, and the basic structure can be released from each other for storage and reuse. A temporary sports field according to claim 12, wherein the layer of natural or artificial grass comprises coverings and / or strips of material, preferably reinforced or unreinforced peat with natural grass or a combination of natural and artificial grass. 5 A temporary sports field according to claim 12 or 13, wherein the basic structure comprises cavities for containing fluid, the basic structure forming a substantially continuous deck supporting the cover, wherein at least a number of said hollow spaces are in fluid communication with each other , and where wick are elements 10 which provide a fluid communication between at least a number of said cavities and the cover for supplying fluid from the cavities to the cover. A temporary sports field according to any of claims 12-14, wherein the cover is at least partially permeable to fluid, in particular Special water, for allowing water to pass through the cover into the cavities and / or for allowing water to pass through the cover for supplying water to natural grass and / or for allowing water to pass through the cover to to evaporate from an upper layer of the cover. 20 A temporary sports field according to any one of claims 12-15, wherein the basic elements are placed on top of a substructure, the substructure being a sports field, for example a sports field of natural grass and / or artificial grass and / or artificial material, such as tartan. A temporary sports field according to any one of claims 12-16, wherein the Basic elements are made of plastic material and are detachably connected to each other, thereby forming a substantially rigid structure. 18. A temporary sports field according to any one of claims 12-17, wherein the cover comprises or is supported by at least one shock-absorbing layer which extends over the basic structure, wherein the shock-absorbing layer is preferably water-permeable and / or provided with 5 of openings or channels to allow water to pass through the shock-absorbing layer to and / or from the cavities. 19. A temporary sports field according to any one of the preceding claims, wherein the basic elements are connected to a flushing device for flushing fluid and / or gas to and / or from said basic elements. 20. A temporary sports field according to any one of claims 12-19, wherein the deck is shaped as: - a substantially closed surface comprising a device of openings, with open ends of columns; or a structure of crossing ribs extending between at least open ends of columns and between open ends of columns and side walls of the base element. A sports field according to any one of claims 12-20, wherein: - the cover comprises a surface formed by natural grass and the surface over which the temporary sports field is provided is a sports field with 20 a plane made from natural grass; or - the cover comprises a surface formed by natural grass and the surface over which the temporary sports field is provided is a sports field with a surface made of artificial grass; or the cover comprises a surface formed by artificial grass and the surface over which the temporary sports field is provided is a sports field with a surface made of natural grass or artificial grass. A sports field according to any one of claims 12-21, wherein connecting elements are provided for mutually connecting adjacent basic elements, wherein the connecting elements are preferably provided with engagement features to allow the elements of the basic structure to be recovered, for releasing the basic elements. 3/16