METHOD FOR CONSTRUCTION OF A GOLF COURSE BUNKER AND GOLF COURSE BUNKER SO OBTAINED

Abstract

 A method for the construction of an underlying layer (1) for bunker (100) of golf course (300) comprises the steps of mixing a predetermined amount of particles (10,20) of a loose material comprising particles of an elastomeric material (10) and particles of a mineral material (20), these latter constituting the most by weight of the particles of loose material (10,20), with a predetermined amount of a binder (30) arranged to amalgamate and keep together the particles obtaining a mixture (5). A step follows for distributing the mixture (5) at a predetermined area (200) of a golf course (300) and, therefore, for drying the binder (30) obtaining an underlying layer (1) having a determined height (H). Then, a covering layer (50) is made above the underlying layer (1)

Description

Field of the invention

[0001] The present invention relates to the golf courses field and in particular it relates to a method for the construction of a golf course "bunker".

[0002] The invention also relates to a golf course bunker obtained by the aforementioned method.

Description of the prior art

[0003] As known, the bunkers are obstacles provided in a golf course which can have a size, a shape and can be present in a number which differs from course to course. Normally, the bunkers can have a surface which goes from about 25 m² to a size of several hundred square metres. A single golf hole can have no bunker, or can have more than 20 bunkers.

[0004] Normally, a bunker forms a depression more or less accentuated with respect to the neighbouring land and is usually provided with a covering layer of sand. However, sometimes, the bunker can have a covering layer of different type, for example a layer of gravel, or another inert material, or can be provided with a covering layer of grass.

[0005] The bunkers are placed along the golf path, on the courses, and near the green, and mainly have the aim of increasing the difficulty of the game for the golfers, because when the ball falls within this obstacle is more difficult to, and is necessary to use special golf clubs and to hit the ball with a technique which is not always easy to perform.

[0006] The golf rules provide that a ball fallen into a bunker must be played within the bunker same, because this is an integral part of the course. For this reason, it is of fundamental importance that they are kept in perfect efficiency. Therefore, it is fundamental that the edges of the bunker are always well defined, that there the drainage is always fully functional and that the sand, or the gravel, is always raked and cleaned, in order to guarantee that the same is free of weeds and waste of different type such as stones, mud and other material which could compromise the stroke of the golfer or the correct functioning of the bunker same, for example due to an obstruction, or compromising the drainage capacity. It is not a coincidence that the correct maintenance of these particular surfaces is among the most difficult to carry out. Precisely in view of the effort required for the correct maintenance of the bunker, the research is oriented to identify systems which allow to rationalise the management of the same. For this purpose, normally, below the covering layer of sand, gravel, or another material, an underlying layer is present in a determined material.

[0007] The underlying layer of a bunker can be simply constituted by a layer of earth, or can provide a layer of stones.

[0008] In other cases, as underlying layer of a bunker can be used a layer of cement, normally a drainage cement. In particular, the cement, in addition to have a high hardness, has also a structural limit which makes it necessary to construct underlying layers with thickness greater than 50 mm or even more.

[0009] A drawback of the prior art bunkers is that many golfers, in the attempt to bring the ball out from the bunker, can hit the underlying layer or a big stone, or the layer of cement, or simply a compact layer of soil, especially in the case of covering layer with a small thickness, and to suffer a backlash which, in addition to damaging the head of the golf club, can also cause trauma to the player's wrist.

[0010] Another drawback of the prior art bunkers is that, in case of heavy rain, or abundant irrigation, the sand tends to move away from the edges and to concentrate towards the lowest areas of the bunker. Therefore, the intervention of at least a worker is necessary, who, usually, by a rake, provides to level the surface of the covering layer, in order to homogeneously distribute the material which form the same, for example the sand, in such a way to restore the starting conditions.

[0011] Furthermore, in case of severe weather phenomena, the bunker can widen and the sand, or another material which forms the covering layer, can be dragged away and is, therefore, necessary to restore the same with new material, with great waste of time, energies and money.

[0012] A further drawback of the golf course bunkers of prior art with an underlying layer of cement is the difficulty of dismantling the same, for example, if the Company managing the plant wishes to change the path by modifying one or more holes.

[0013] Examples of golf course bunkers of prior art having the aforementioned drawbacks are described in WO2012/046014 and FR3049964.

Summary of the invention

[0014] It is, therefore, an object of the present invention to provide a method for the construction of golf course bunkers that is able to overcome the aforementioned drawbacks of the prior art bunkers.

[0015] It is, in particular, object of the present invention to provide a method for the construction of golf course bunkers which is highly draining and, therefore, able to keep over time the properties that it had at the moment of its installation unchanged, thus avoiding frequent extraordinary or ordinary maintenance interventions for restoring the starting conditions.

[0016] It is another object of the present invention to provide a method for the construction of golf course bunkers which is able to adapt itself to the conformation of the ground where is installed.

[0017] It is still another object of the present invention to provide a method for the construction of golf course bunkers which is able to prevent invasion by weed species and roots.

[0018] It is a particular object of the present invention to provide a method for the construction of golf course bunkers which is able to preserve the quality of the sand of the bunker avoiding that these can be mixed with soil or stones.

[0019] It is also a particular object of the present invention to provide a method for the construction of golf course bunkers which is highly draining in such a way to avoid that the sand, or another inert material, is dragged away from the banks.

[0020] It is a further object of the present invention to provide a method for the construction of golf course bunkers which is able to avoid any damage to the club head and trauma to the wrists and to the arms of the player.

[0021] It is still another object of the present invention to provide a method for the construction of golf course bunkers which allows to be quickly and easily removed in case that the shape of the bunker has to be changed, or the same has to be dismantled.

[0022] It is also an object of the present invention to provide a golf course bunker having the same advantages.

[0023] These and other objects are achieved by a method for the construction of golf course bunkers comprising the steps of:

• mixing a predetermined amount of particles of loose material with a predetermined amount of a binder arranged to amalgamate and keep together the aforementioned particles obtaining a mixture;
• distributing the aforementioned mixture at a predetermined area of a golf course;
• drying of said binder in such a way to obtain an underlying layer having a determined height H;
• obtaining a covering layer above the aforementioned underlying layer;

whose main characteristic is that said particles of said loose material comprise a predetermined amount of particles of an elastomeric material and a predetermined amount of particles of a mineral material and that the most by weight of said particles of said loose material is constituted by said particles of said mineral material.

[0024] Other features of the invention and the related embodiments are set out in the dependent claims.

[0025] The particular technical solution adopted by the present invention to provide the aforementioned underlying layer of a golf course bunker allows to obtain a product with a high elasticity and, therefore, able to easily adapt itself to the conformation of the ground which forms the basis of the bunker.

[0026] In particular, the ratio R by weight between said predetermined amount of said particles of mineral material and said predetermined amount of said elastomeric material is comprised between 10:1 and 2:1, advantageously between 8:1 and 4:1.

[0027] In particular, the aforementioned particles of elastomeric material can have a first predetermined size d1. More in particular, the aforementioned first predetermined size d1 can be comprised between 1 mm and 12 mm, advantageously between 2 mm and 12 mm, preferably between 2 mm and 8 mm.

[0028] In a preferred embodiment, the aforementioned particles of loose material can comprise, furthermore, a predetermined amount of particles of inert material.

[0029] In an embodiment of the invention, the aforementioned mineral material can comprise fragments, or particles of rock, or gravel.

[0030] In particular, the aforementioned particles of the aforementioned mineral material can have a second predetermined size d2.

[0031] More in particular, the aforementioned second predetermined size of the particles of mineral material can be comprised between 1 mm and 12 mm, advantageously between 2 mm and 12 mm, preferably between 2 mm and 8 mm, for example comprised between 3 mm and 6 mm.

[0032] In particular, the aforementioned mineral material can be rock, preferably calcareous rock, or a similar material, obtained by crushing, in such a way to increase the draining action exerted by the same towards irrigation and rain water.

[0033] In particular, the aforementioned determined height H of the underlying layer can be comprised between 15 mm and 45 mm, advantageously comprised between 20 mm and 40 mm, preferably comprised between 20 mm and 30 mm, for example comprised between 24 mm and 30 mm.

[0034] In particular, the ratio by weight between the predetermined amount of the particles of inert material and the predetermined amount of the particles of elastomeric material can be 5:1, or 4:1.

[0035] Preferably, the aforementioned elastomeric material can be selected among:

• EPDM rubber, or ethylene propylene diene monomer;
• SBR rubber, or butadiene and styrene copolymer;

or a combination thereof.

[0036] Preferably, the aforementioned binder can be a polyurethane resin, or a vinyl resin, or an acrylic resin, or an epoxy resin, or a combination thereof.

[0037] In particular, the aforementioned resin, for example the aforementioned polyurethane resin, can be a resin with elastic properties.

[0038] In particular, the presence of rubber and resin with elastic properties confer to the underlying layer of the bunker a determined elasticity. In this way, it is possible to overcome some of the drawbacks described above of the prior art solutions in particular caused by the hardness of the layer which forms the underlying layer of the prior art bunkers and which can, as anticipated above, cause trauma and injuries to the wrists and the arms of the golfer who tries to get the ball out from the bunker, or can damage the club head which is used for the stroke .

[0039] In an alternative embodiment, before positioning the underlying layer at a predetermined area of the golf course, a preliminary step can be provided for arranging a tarpaulin or a mat at the aforementioned predetermined area of the golf course delimited by a perimetral edge. In this case, therefore, the underlying layer is positioned above the aforementioned tarpaulin.

[0040] In particular, the aforementioned tarpaulin can be made of an impermeable material, in such a way to help the rain and/or irrigation water to flow towards the drainage channels once that this has gone beyond the underlying layer of the bunker. More in particular, the aforementioned tarpaulin can be made of a plastic material, for example polyethylene, preferably low density polyethylene, or LDPE.

[0041] In particular, a step can be, furthermore, provided for grassing said perimetral edge.

[0042] According to another aspect of the invention, a golf course bunkers comprises:

• a underlying layer having a predetermined height H and comprising a predetermined amount of particles of loose material kept together by a binder;
• a covering layer positioned above the aforementioned underlying layer;

wherein said loose material comprises a mixture of a predetermined amount of particles of an elastomeric material and a predetermined amount of particles of a mineral material, and wherein the most by weight of said particles of loose material is constituted by said particles of said mineral material.

[0043] In particular, the ratio by weight R between the predetermined amount of said particles of mineral material and said predetermined amount of said elastomeric material can be comprised between 10:1 and 2:1, advantageously between 8:1 and 2:1, preferably between 8:1 and 3:1, for example between 8:1 and 4:1.

[0044] In particular, the aforementioned covering layer can be formed by sand, in particular siliceous sand, or da particles of an inert material having a predetermined size, in particular gravel, or a different mineral material.

Brief description of the drawings

[0045] The invention will now be shown with the following description of its exemplary embodiments, exemplifying but not limitative, with reference to the attached drawings in which:

• Fig. 1 diagrammatically shows a side elevational perspective view of an area of a golf course where a golf course bunker can be constructed by using the method, according to the invention;
• Figures 2 and 3 diagrammatically show two steps of the method, according to the invention, for constructing a golf course bunkers;
• Fig. 4 diagrammatically shows the golf course bunkers obtained through the method, according to the invention;
• Fig. 5 diagrammatically shows the bunker of figure 4 in a cross section view according to the arrows V-V to highlight some characteristics;
• Fig. 6 diagrammatically shows the bunker of figure 4 during a stroke of a golfer to try to get the ball out of the same;
• Fig. 7 diagrammatically shows an enlargement of the bunker of figure 6 in a cross section view to highlight some characteristics;
• Fig. 8 diagrammatically shows an alternative embodiment of the bunker of figure 4 during a stroke of a golfer to try to get the ball out of the same;
• Fig. 9 diagrammatically shows an enlargement of the bunker of figure 8 in a cross section view to highlight some characteristics;
• Fig. 10 diagrammatically shows a side elevational perspective view a depression provided at a determined area of a golf course where is positioned a tarpaulin, according to what is provided by a possible embodiment of the invention;
• Fig. 11 diagrammatically shows the bunker obtained by positioning the underlying layer, according to the invention, on the tarpaulin of figure 10 and a layer of sand;
• Fig. 12 diagrammatically shows a cross section view according to the arrows XII-XII of the bunker of figure 11 to highlight some characteristics;
• Fig. 13 diagrammatically shows the bunker of figure 11 during a stroke of a golfer to try to get the ball out of the same;
• Fig. 14 diagrammatically shows an enlargement of the bunker of figure 13 in a cross section view to highlight some characteristics.

Detailed description of some exemplary embodiments of the invention

[0046] With reference to figure 1, a method, according to the invention, for the construction of a golf course bunker 100 provides a mixing step, in particular in situ, for example by a concrete mixer 150, or another device for mixing predetermined amount of particles of at least a loose material with at least a predetermined amount of a binder, in particular arranged to amalgamate and keep together the aforementioned particles. More in particular, the aforementioned particles of loose material comprise a predetermined amount of particles 10 of an elastomeric material and a predetermined amount of particles 20 of an inert material, in particular a mineral material. In particular, the most by weight of the particles of the aforementioned loose material is constituted by particles of inert material 20, preferably mineral material.

[0047] In particular, the ratio by weight between the predetermined amount of the particles of inert material, in particular mineral material 20, and the predetermined amount of the particles of elastomeric material 10 can be comprised between 10 a 1 and 2 a 1, advantageously between 8 a 1 and 3 a 1, preferably between 8 a 1 and 4 a 1. More in particular, the aforementioned ratio by weight R can be 8 a 1, advantageously 7 to 1, preferably 6 to 1. Preferably, the ratio by weight between the predetermined amount of the particles of mineral material 20 and the predetermined amount of the elastomeric material 10 can be 5 to 1.

[0048] Preferably, the elastomeric material 10 can be made of EPDM rubber, or ethylene propylene diene monomer, or made of SBR rubber, or butadiene and styrene copolymer, or can be obtained by mixing together determined amount of these 2 typologies of rubber. A step follows diagrammatically shown in figure 2, follows of distributing the aforementioned mixture 5 on the surface of a predetermined area 200 of the golf course, in particular an area 200 at which a depression is present. For example, the aforementioned step of distributing the mixture 5 can be carried out by hands by one or more workers 105, for example by manual roller compactors 110, or can be carried out by at least a roll mounted on a machine of known type.

[0049] The more or less homogeneous layer of the aforementioned mixture is, then, it is left to dry for a determined period of time in such a way to obtain an underlying layer 1 having a determined height H, diagrammatically shown in figure 3. The height H of the underlying layer 1 can be comprised between 15 mm and 45 mm, advantageously comprised between 20 mm and 40 mm, for example comprised between 25 mm and 30 mm.

[0050] Then, a step follows for obtaining a covering layer 120 above the aforementioned underlying layer 1 obtaining the bunker 100, as diagrammatically shown in figure 4.

[0051] Therefore, as diagrammatically shown in the figures 5 and 7, in a first embodiment of the invention, a bunker 100 comprises an underlying layer 1 comprising particles of elastomeric material 10 and particles of an inert material, preferably a mineral material, such as a rock, in particular at least a calcareous rock, gravel, and similar materials, kept together by binder 30. In particular, the underlying layer 1 can be laid on the ground 80 shaping it appropriately to its shape in a simple and quick way thanks to the elasticity of which the underlying layer 1 same is provided of.

[0052] Above the underlying layer 1, the covering layer 50 is made, for example by distributing sand, preferably siliceous sand, or gravel, or loose inert material of another type. In an alternative embodiment of the invention not shown in figure for simplicity, in the aforementioned covering layer 50 can be caused to root at least a vegetable species obtaining a natural turf, or mixed natural and artificial. The aforementioned particles 20 of inert material can be a natural aggregate deriving from grinding calcareous rocks.

[0053] Therefore, an underlying layer 1 is obtained comprising a predetermined amount of particles of the aforementioned elastomeric material 10, in particular having a first predetermined size d1, and a predetermined amount of particles 20 of the aforementioned inert material, in particular a mineral material, for example rock, or stone, advantageously having a second predetermined size d2. A this purpose, it should be pointed out that the particles of elastomeric material 10 and the particles of inert material 20, can be preliminary mixed to each other in such a way to form a starting mixture. This latter is, then, further mixed, in situ, with the binder 30 to be amalgamate and kept together as described above.

[0054] Both the first predetermined size d1 and the second predetermined size d2 of the particles can be comprised between 1 mm and 14 mm, advantageously between 1 mm and 12 mm, preferably between 2 mm and 12 mm, more preferably between 2 mm and 8 mm, for example between 3 mm and 6 mm. In particular, the particles of mineral material 20 can be washed rounded particles of fragments of rock, or stone. In addition to or alternatively, the aforementioned particles of mineral material 20, in particular rock, can derive from a grinding process in such a way that the aforementioned particles are provided with jagged edges. This latter embodiment allows to obtain an underlying layer 1, according to the invention, with a greater drainage capacity with regard to the irrigation and rain water. According to an embodiment of the invention, the aforementioned mixture consists of the aforementioned particles of elastomeric material 10, the aforementioned particles of mineral material 20 and the aforementioned binder 30.

[0055] In the alternative embodiment diagrammatically shown in the figures 8 and 9, the particles of loose material comprise, furthermore, particles 25 of at least another material, for example an inert material, for example another mineral material. Generally, the particles of loose material used in the mixture have a size comprised between 1 mm and 14 mm, more in particular between 2 mm and 12 mm, advantageously between 2 mm and 10 mm, preferably between 3 mm and 8 mm, for example between 6 mm and 8 mm.

[0056] The binder 30 used to amalgamate and to keep together the particles which are present in the mixture 5 described above with reference both to the figures 4 and 5, and to the figures 6 and 7, and to the figures 8 and 9, can be a polyurethane resin, or an epoxy resin, or alternatively a polyurethane resin, or an acrylic resin, or a combination of at least 2 of these resins.

[0057] In an embodiment according to the invention, the aforementioned polyurethane resin is a resin based on diphenylmethane 4,4'-diisocyanate.

[0058] In all the embodiments of the bunker 1 obtained according to the present invention, the particular technical solution adopted to obtain the underlying layer 1 of the bunker 100 and more precisely the presence of the particles of elastomeric material 10 and the aforementioned resin 30 provides high elasticity to the layer of composite material. This allows to the underlying layer 1 and, therefore, to bunker 100 as a whole, on the one hand, to easily adapt itself to the ground conformation 80 which forms the base of the bunker 100 or the area 200 where it is made, and to any sinking, and, on the other hand, to cushion the stroke landed by the golfer in order to cause the ball to go out of the bunker 100 avoiding to damage the head of the golf club and preventing any trauma for the golfer, in particular to the wrists of the player. In this way, it is possible to overcome the drawbacks of the prior art solutions and legate to the hardness of the underlying layer both in the case of underlying layers in terra, or stone, and in the case of underlying layers made of cement, in particular drainage cement, and analogous materials.

[0059] Another advantage of the present invention is the possibility to make an underlying layer 1 with a height H less than the height of the prior art underlying layers, that means 50 mm or even higher.

[0060] In particular, the presence also of particles of inert material, in particular mineral material 20 mainly has the further advantage to make the underlying layer 1, according to the present invention, greatly drainage avoiding problems of floods in case of severe and sudden weather phenomena, or abundant irrigation such those that are, normally, carried out in the hottest periods of the year and that can cause the material to come out, in particular the material of the covering layer 50, normally sand, or gravel, dal bunker 100 with the need to restore the same and to carry out extraordinary maintenance operations.

[0061] According to what is provided by the present invention and diagrammatically shown in the figures from 10 to 14, an embodiment of a golf course bunker 100 300 comprises a preliminary step of positioning a tarpaulin, or mat, 40 at the aforementioned predetermined area 200 of the golf course 300. In particular, the area 200, in particular a lowered area, is delimited by a perimetral edge 201 and intended to house the aforementioned bunker 100. Then, a step follows of distributing above the tarpaulin 40 of the aforementioned mixture 5 obtained as described above with reference to the figures from 1 to 14, in such a way to obtain the aforementioned underlying layer 1, and of constructing the covering layer 50, in particular by distributing above the underlying layer 1 of sand, or gravel, or another inert material, up to obtain a layer having a determined height.

[0062] In a preferred embodiment, the aforementioned tarpaulin 40 can be made of an impermeable material, in such a way to help the rain and/or irrigation water to flow towards the collecting and drainage channels of the water, not shown in the figure for clarity reasons, that can be, for example, made at a peripheral position, after that the same has gone beyond the underlying layer 1 of bunker 100. More in particular, the aforementioned tarpaulin 40 can be made of a plastic material, for example polyethylene, preferably low density polyethylene, or LDPE.

[0063] In particular, a step can be, furthermore, provided for grassing the perimetral edge 201 and, in case, near the same.

[0064] Furthermore, preliminary steps can be provided of making the water drainage system and, therefore, of positioning ducts and wells, according to procedures adopted also in the state of the art and, therefore, known to a skilled person in the field, and, for this reason, not here described in detail.

[0065] In particular, a preliminary step can be provided of obtaining a drainage layer, for example made of gravel, or other drainage material, before positioning the tarpaulin 40 on the same.

[0066] The foregoing description exemplary embodiments of the invention will so fully reveal the invention according to the conceptual point of view, so that others, by applying current knowledge, will be able to modify and/or adapt for various applications such embodiment without further research and without parting from the invention, and, accordingly, it is therefore to be understood that such adaptations and modifications will have to be considered as equivalent to the specific embodiments. The means and the materials to realize the different functions described herein could have a different nature without, for this reason, departing from the field of the invention. It is to be understood that the phraseology or terminology that is employed herein is for the purpose of description and not of limitation.

Claims

1. Method for the construction of a bunker (100) comprising the steps of:

- mixing a predetermined amount of particles (10,20) of loose material with a predetermined amount of a binder (30) arranged to amalgamate and keep together said particles (10,20) obtaining a mixture (5);

- distributing said mixture (5) at a predetermined area (200) of a golf course (300);

- drying of said binder (30) in such a way to obtain an underlying layer (1) having a determined height (H) ;

- obtaining a covering layer (50) above said underlying layer (1);

said method being characterized in that said particles (10,20) of said loose material comprise a predetermined amount of particles (10) of an elastomeric material and a predetermined amount of particles (20) of a mineral material and in that the most by weight of said particles of said loose material is constituted by said particles (20) made of said mineral material.

2. Method, according to claim 1, wherein the ratio by weight (R) between said predetermined amount of said particles of mineral material (20) and said predetermined amount of said elastomeric material (10) is comprised between 10:1 and 2:1.

3. Method, according to claim 1, wherein the ratio by weight (R) between said predetermined amount of said particles of mineral material (20) and said predetermined amount of said elastomeric material (10) is comprised between 8:1 and 4:1.

4. Method, according to one or more of the previous claims, wherein said particles (10) of said elastomeric material have a first predetermined size (d1) comprised between 1 mm and 12 mm.

5. Method, according to one or more of the previous claims, wherein said particles (20) of said mineral material have a second predetermined size (d2) comprised between 1 mm and 12 mm.

6. Method, according to claims 3 and 4, wherein both said first predetermined size (d1) and said second predetermined size (d2) is comprised between 2 mm and 12 mm.

7. Method, according to one or more of the previous claims, wherein said particles (20) of mineral material are particles of calcareous rock.

8. Method according to the previous claims, wherein said determined height (H) of said underlying layer (1) is comprised between 20 mm and 40 mm.

9. Method according to one or more of the previous claims, wherein said ratio (R) between said predetermined amount of said particles of mineral material (20) and said predetermined amount of said elastomeric material (10) is 5:1, or 4:1.

10. Method according to one or more of the previous claims, wherein said elastomeric material is selected among:

- EPDM rubber, or ethylene propylene diene monomer;

- SBR rubber, or butadiene and styrene copolymer;

or a combination thereof.

11. Method according to one or more of the previous claims, wherein said binder (30) is selected among:

- a polyurethane resin;

- a epoxy resin;

- a vinyl resin;

- a acrylic resin;

or a combination thereof.

12. Method according to one or more of the previous claims, wherein said binder (30) is a resin based on diphenylmethane 4,4'-diisocyanate.

13. Method according to one or more of the previous claims, wherein said particles (20) of mineral material are obtained by grinding mineral material, in such a way that said particles (20) are provided with jagged edges, to increase the drainage capacity of said underlying layer (1).

14. Method according to one or more of the previous claims, wherein before said positioning step of said underlying layer at a predetermined area of a golf course, a step is provided for positioning a tarpaulin made of impermeable material at said predetermined area of said golf course, in such a way to help the rain and/or irrigation water to flow towards at least a drainage channel after that the same has gone beyond said underlying layer.

15. A bunker (100) for a golf course (200) comprising from above to below:

- an underlying layer (1) having a predetermined height (H) and comprising a predetermined amount of particles of at least a loose material kept together by a binder (30);

- a covering layer (50) positioned above said underlying layer (1);

said bunker (100) for a golf course (200) being characterized in that said loose material comprises a mixture of a predetermined amount of particles (10) of an elastomeric material and a predetermined amount of particles (20) in a mineral material and in that the most by weight of said particles of said loose material is constituted by said particles (20) in said mineral material.

Drawing