FR2903710A1 - Unit for forming a swimming zone in natural medium e.g. river or sea, comprises separating and isolating units of the swimming zone, unit for supplying clean, treated and/or purified water, water sampling unit, and water treatment unit - Google Patents

Abstract

The unit for forming a swimming zone in a natural medium such as river or sea, comprises separating and isolating units of the swimming zone, a unit (17) for supplying clean, treated and/or purified water, a water sampling unit, a water treatment unit (21), a processing unit (22), an overflow unit, a unit (25) for evacuating the used or waste water, and a pump. The water treatment unit comprises a sand filter. The separation and isolation units comprise a floating dam formed of succession elements, floaters in upper part, and mooring structure in base part. The unit for forming a swimming zone in a natural medium such as river or sea, comprises separating and isolating units of the swimming zone, a unit (17) for supplying clean, treated and/or purified water, a water sampling unit, a water treatment unit (21), a processing unit (22), an overflow unit, a unit (25) for evacuating the used or waste water, and a pump. The water treatment unit comprises a sand filter. The separation and isolation units comprise a floating dam formed of succession elements, floaters in upper part and mooring structure in base part. An anti-return valve is regularly disposed on the floating dam. A geo-textile material film or cloth covers a bottom of the swimming zone. The film or cloth has a dimension ensuring the isolation to the base of the floating dam. A unit is arranged for retaining or maintaining the floating dam such as immersed heavy object.

Description

SWIMMING AREA IN A NATURAL ENVIRONMENT PROVIDED WITH WATER SUPPLY MEANS

  The present invention relates to the realization of a bathing area, delimited in a natural environment, such as a river, a lake or the sea, and associated with means for supplying clean and treated water. Bathing areas delimited in a river or the sea are known by a barrier, generally in the form of a line of floats whose two ends are fixed to the shore or bank, said line forming a U. This makes it possible to delimit Visually the bathing area, for security reasons, the surface to be monitored is thus reduced and circumscribed. However, this float device provides no insulation of the bathing place in relation to the natural environment. However, the natural environments where these bathing areas are located may not be suitable, in particular for hygiene, for bathing, and / or in compliance with the regulations in force, and / or with the users' requirements. (clarity of the water). The present invention aims to remedy this situation and proposes a set to achieve a bathing area in natural environment, which is physically isolated from the surrounding natural environment. In addition, the invention makes it possible to have a bathing zone whose water complies with either regulatory or user requirements. In addition, the invention does not use polluting treatment (chemical for example); Moreover, the invention limits the minimum budget of such bathing areas, both in terms of investment, and operation, while 2903710 2 being adjustable according to the needs, the season, and constraints from other users of the natural environment (fishermen and recreational light craft). Finally, the invention makes it possible to bring back existing installations to the standards. To this end, according to the invention, the bathing area assembly delimited by separation means, in a natural environment such as a river or the sea, is characterized in that it comprises on the one hand means separation and isolation of the bathing area from said natural environment, and secondly means for supplying clean water and / or treated and / or purified. Preferably, the assembly comprises means for taking water from said natural environment (excluding said bathing area), treatment means for rendering said water clean and / or treated and / or purified, and conveying means. and discharging the latter into said bathing area. Also provided means for evacuation of wastewater, waste, or other for evacuation or treatment, outside the bathing area. Said means comprise a pump.

In order to treat the sampled water, to make it suitable for use, particularly in terms of clarity, the treatment means comprise a sand filter. The separation and isolation means preferably consist of a floating barrier formed either of at least one skirt or of a succession of elements arranged next to each other and provided with floats at the top. and ballast (such as a chain) at the bottom.

Advantageously, there are provided means for evacuation from the bathing area, the overflow water, to the natural environment, said means preferably being constituted by nonreturn valves, advantageously arranged in a regular manner on said separation and isolation means. Means are provided for retaining and / or maintaining the floating boom, such as for example heavy submerged objects forming a dead body. The bottom of the bathing area is covered with a film, tablecloth, or equivalent, of a geo-textile material.

Said sheet or said film is of such size as to insure the isolation of the swimming area, especially at the base of the floating dam. The invention will be better understood in the light of the following description relating to illustrative, but not limiting, examples of the invention, with reference to the accompanying drawings, in which: FIG. 1 is a diagram in plan view of a bathing area and the whole of the invention; Figure 2 is a front view partially showing the floating dam; Figure 3 is a side view of said floating dam; Figure 4 is a schematic sectional view of the connection between the dam and the bottom of the natural environment (sea, river, lake); Figure 5 is a side view in section showing schematically the bathing area and the feeding means, sampling, water treatment.

In a diagrammatic plan view, in FIG. 1, a bathing zone A separated and delimited with respect to an aquatic natural environment, referenced B, such as the sea, a river, or a lake, is represented by means separation and isolation 1.

5 Bathing area A and aquatic environment B are bordered by a shoreline or beach 2. The junction between shoreline (or beach) 2 and the aquatic area (A and / or B) consists of a shoreline or of a bank 3. Bathing zone A is separated from natural environment B by a floating barrier 4, consisting either of a semi-flexible skirt 5, or of a series of contiguous panels, or of continuous flexible material, and forming a general shape of U whose opening is turned towards the bank 3. The floating dam is held in place and U-shaped by immersed heavy elements forming anchors. In general, the notion of transversal means a direction substantially perpendicular to the bank 3. The bathing area has an area of several hundred square meters, and more precisely as an example of the order of 500 m2. On shore 2, and preferably offset upstream or downstream from bathing area A, are provided: - means for taking water from the natural aquatic medium B; means for treating said withdrawn water; means for conveying said treated / purified water to bathing zone A.

These means are described in more detail later.

Referring to Figure 3, there is shown in front view of a portion of the floating dam 4, that is to say in a vertical plane substantially parallel to the bank (or substantially tangent to the dam). Figure 3 shows a side view of said dam, i.e. in a transverse vertical plane. The floating boom 4 comprises a skirt 5, or a series of panels, x joined, the panels 5A, 5B and 5C are shown in Figure 2. Are included in the upper part of the dam, floats 6, each formed a parallelepipedic box. Preferably, each float chamber 10 exceeds level C of the water plane. Between two consecutive panels is provided a vertical junction element 7 surmounted by a guide ring 8A (8B) through which passes a substantially horizontal strip 9, which follows the perimeter of the floating barrier from one end to the other. The lower part of the floating boom 4 comprises a member forming the perimeter of the dam, forming ballast and constituted in this case by a chain 10, fixed to the base of the dam by a series of straps 11A, 11B, 11C, the chain 10 protrudes slightly from the lower edge 12 to the dam 4. Reference is made to FIG. 4, showing in vertical cross-section, schematically, the floating dam 4 in place. On the bottom 13 of the bathing zone A, from the bank 3 to the base of the dam 4, is disposed a film or sheet 14 of flexible material, of the type known by the geo-textile name, consisting in a known manner of a nonwoven, or kind of felt, of needled polypropylene. This material is rot-proof, flexible and puncture resistant. The film 13 is fixed in known manner on the bank 3: it can be maintained by the weight of the water column, and by a coating of gravel. The film 14 rests against the inner wall (on the bathing zone side A) of the floating dam 4 at its peripheral edge 15. At the lower edge 12 of the dam, and the ballast chain 10, the film 13 forms a pocket 16 or bead, due to the pressure of the water, which slightly pushes the weight chain 10 and the straps 11 to the natural environment B. Figure 15 shows, on an enlarged scale and which is not not proportional, the bead 16 thus formed at the base of the dam. Reference is now made to FIG. 5, which shows diagrammatically the side and section of the device of the invention making it possible to supply filtered and / or purified water to bathing zone A. FIG. 1. The water, intended to be injected into or to supply bathing zone A, is taken, according to one embodiment of the invention, from the natural medium B, via a strainer 17 arranged in the natural environment B, upstream of the bathing area, at a distance, for example a few meters, from the bank 3. The strainer 17 is connected via a pipe 18 to a pump 19 disposed in a technical room 20 located on the shore 2. The pump 19 delivers the water sucked from the strainer 17 to filtration means, such as preferably a sand filter 21 known per se. The pump and the filter are preferably arranged in the technical room 20. The sand filter 21 makes it possible to retain particles larger than 25 microns. Thus, the water leaving the filters has a degree of clarity consistent with the regulations. Alternatively (not shown), the pump can be submerged and is then forced back to the sand filter. The filtered, washed, and purified water leaving the sand filter 21 is discharged via a pipe 22 into the bathing zone A, via channels 23 and 24 whose downstream ends 23A and 24A open at the level of the bank 3. The materials, materials, waste and other undesirable products, derived from the sand filter 21, are evacuated, via a conduit 25, to an evacuation zone (not shown), or downstream , in the natural environment. In order to ensure the circulation of water and to evacuate the overflow from the bathing area, check valves 26 are provided on the wall of the floating dam 4.

It will be understood that, thanks to the device of the invention, the bathing zone A thus has a renewed water, and meets the requirements of both clarity and cleanliness. The floating boom may consist of a single skirt, or several skirts put end to end. By way of example only, the skirt of the floating dam may be 25 meters wide and 3 to 10 meters high. Alternatively, the skirt of the floating dam may comprise a mesh frame, or a lattice, for mechanically reinforcing the skirt including attacks of marine animals, such as sharks. The flow rate of the pump (s) may be such as to allow the volume of the bathing area to be renewed for a period of between 3h and 15h, for example of the order of 100 to 150 m3 per hour; several pumps can be installed.

Claims (10)

  Bathing area assembly (A) delimited by separation means, in a natural environment such as a river or the sea (B), characterized in that it comprises on the one hand means (4, 5 , 6) separating and isolating the bathing zone (A) from said natural environment, and secondly feeding means (17, 18, 22) in clean and / or treated water and / or purified.   2. Assembly according to claim 1, characterized in that it comprises means (17, 18) for taking water from said natural environment (excluding said bathing zone), treatment means (21) for making said water clean. and / or treated and / or purified, and means for conveying (22) and discharging the latter into said bathing area (A).   3. The assembly of claim 2, characterized in that it further comprises means for discharging (25) waste water, waste, or other, for evacuation or treatment, outside the bathing area (A).   4. The assembly of claim 3, characterized in that said means comprise a pump (19).   5. The assembly of claim 3, characterized in that the processing means comprise a sand filter (21).   6. Assembly according to one of claims 2 to 5, characterized in that the separation and isolation means consist of a floating barrier (4) formed either of at least one skirt (5), or of a succession of elements arranged (5A, 5B, 5C) next to the other 2903710 9, and provided with floats (6) at the top and ballast (10) (such as a chain) at the bottom.   7. Assembly according to one of claims 2 to 6, characterized in that it comprises means for evacuation from the bathing zone, water overflow, to the natural environment, said means being preferably constituted by nonreturn valves (26), advantageously arranged in a regular manner on said dam. 10   8. Assembly according to one of claims 2 to 7, characterized in that the bottom of the bathing area is covered with a film (14), web, or equivalent, of a geo-textile material.   9. An assembly according to claim 8, characterized in that said sheet or said film (14) is of such size that it ensures the isolation of the swimming area (A) in particular at the base of the floating dam (4) .   10. The assembly of claim 6, characterized in that it comprises means for retaining and / or maintain the floating boom, such as for example heavy immersed objects, forming dead body (10).