WO2020165549A1

WO2020165549A1 - Cover structure for a pollutant emitting site, the construction method thereof and a method for protecting the environment implementing this cover structure

Info

Publication number: WO2020165549A1
Application number: PCT/FR2020/050277
Authority: WO
Inventors: Guillaume DESROCQUES
Original assignee: Desrocques Guillaume
Priority date: 2019-02-15
Filing date: 2020-02-14
Publication date: 2020-08-20
Also published as: FR3092855A1; FR3092855B1

Abstract

The invention relates to an improved cover structure (1) for a site (2) emitting pollutants, preferably airborne pollutants. The purpose of this improved structure is to be light, rigid, robust, easy to assemble and disassemble, economical. To this end, the cover structure according to the invention comprises: - a rigid frame (3) fixed to the ground and/or resting on the ground; - an enclosure (10) for the pollutant emitting site (2): * said enclosure (10) forming a pollutant barrier, which advantageously is sealed/insulating; and * at least part of this enclosure (10) being formed by inflatable and inflated framework elements (110, 120, 130); links (8, 14, 15, 16) for securing the enclosure (10) to the frame (3); - a system (20) for filtering the atmosphere of the pollutant emitting site (2). The invention also relates to the method for constructing this cover structure and to a method for protecting the environment implementing said structure.

Description

Title: COVER STRUCTURE FOR A SITE TRANSMITTING

POLLUTANTS, ITS CONSTRUCTION PROCESS AND AN ENVIRONMENTAL PROTECTION PROCESS IMPLEMENTING THIS

COVER STRUCTURE

Technical area

The field of the invention relates to the protection of the environment and more specifically to means of combating pollutants, preferably airborne, such as noise pollution, gaseous effluents, possibly loaded with fine particles, in particular gaseous effluents emitted by heat engines, including in particular those fitted to transport vehicles, and domestic or industrial heating installations. It can also be industrial gas and / or dust emissions: methane, odors, dust emitted by industrial breeding sites and waste storage sites; exterior paints, dust produced by exterior cutting, grinding or combustion operations.

[0002] More specifically, these are means of confinement, capture and / or treatment of airborne pollutants emitted by various road, industrial and domestic sites.

[0003] Thus, the present invention relates to a cover structure for a site emitting pollutants, preferably airborne.

The invention also relates to a method of constructing this cover structure as well as a method for protecting the environment using this cover structure.

Prior art

The protection of residents of high traffic axes, against noise, odor, gas and particulate pollution, is generally not or poorly ensured.

We obviously know noise barriers, which are a stopgap in terms of noise control, which in no way shield other airborne pollution.

Certain portions of busy roads are covered by massive reinforced concrete structures, extremely expensive, long and complex to build, not to mention their questionable aesthetic appearance. In addition, these structures are intended to be built for very long periods, as their dismantling is expensive. These are therefore major obstacles to the redevelopment of the urban and road environment.

Given these drawbacks, these heavy anti-pollution constructions are therefore not very widespread. [0005] PCT patent application W095 / 14141 describes a method for constructing a screen above a traffic lane, to limit visual and hearing nuisance. According to this process, the traffic lane is covered with a temporary cover which allows traffic to continue normally during the works. This temporary cover is itself surmounted by an inflatable structure, so as to define an enclosed space. The inner wall of this inflatable structure is covered with a hardening material such as plastic foam and reinforced concrete. This inflatable structure thus provided with an internal double-layer foam plastic / reinforced concrete coating forms the final screen surmounting the traffic lane.

This inflatable structure is comparable to that described in European patent EP0357151B1. Once inflated, the structure according to this European patent is airtight. It rests on a foundation. The interior face of this inflatable structure is coated with a layer of foam resin, in which are fixed plates supporting anchor rods. Reinforcing bars attached to these anchor rods are then covered with concrete so as to form a rigid inner shell.

The construction of this type of known inflatable structures, reinforced by inner walls of plastic foam and reinforced concrete, is difficult to build and not very economical. These single-compartment inflatable structures do not have optimal mechanical properties, suitable for their applications. Their durability is poor. As other drawbacks of these known covering inflatable structures, mention may also be made of the fact that the reliability and solidity of the connection between the layer of plastic foam and the outer inflatable wall seem very precarious. The same applies to the connection between the layer of plastic foam and the internal reinforced concrete shell. In addition, the effectiveness of this inflatable structure, in terms of polluting barrier, remains to be demonstrated. Finally, they are not easily dismantled.

Technical problem - Objectives of the invention

[0006] In this context, the problem therefore arises of providing an improved cover structure for a site emitting pollutants, preferably airborne.

[0007] Thus, the present invention aims to satisfy at least one of the objectives set out below.

[0008] One of the essential objectives of the present invention is to provide an improved cover structure for a site emitting pollutants, preferably airborne, this cover structure being both light (compared to concrete architectural works existing) and provided with mechanical properties (rigidity, mechanical strength) allowing it to withstand, over long periods of time, the conditions of use, in particular for covering traffic routes and industrial sites emitting pollutants.

[0009] One of the essential objectives of the present invention is to provide an improved cover structure for a site emitting pollutants, preferably airborne, this cover structure being easy to build and to dismantle.

One of the essential objectives of the present invention is to provide an improved cover structure for a site emitting pollutants, preferably airborne, this cover structure being quick to build and to dismantle.

One of the essential objectives of the present invention is to provide an improved cover structure, for a site emitting pollutants, preferably airborne, this cover structure being able to be constructed in sections, for example a section in one night, of so as to allow limited traffic disruption during construction.

[0012] One of the essential objectives of the present invention is to provide an improved cover structure, for a site emitting pollutants, preferably airborne, this cover structure, the construction and dismantling of which are very economical.

One of the essential objectives of the present invention is to provide an improved cover structure for a site emitting pollutants, preferably airborne, this cover structure offering all the guarantees in terms of safety both in use and construction and dismantling.

[0014] One of the essential objectives of the present invention is to provide an improved cover structure for a site emitting pollutants, preferably airborne, this cover structure, the construction and dismantling of which have a reduced environmental impact.

One of the essential objectives of the present invention is to provide an improved cover structure, for a site emitting pollutants, preferably airborne, this cover structure having a sufficient range to cover a site of significant size, regardless of its shape.

One of the essential objectives of the present invention is to provide an improved cover structure for a site emitting pollutants, preferably airborne, this cover structure constituting effective protection against these pollutants of any kind whatsoever, sound, gaseous and / or particulate.

[0017] One of the essential objectives of the present invention is to provide an improved cover structure for a site emitting pollutants, preferably airborne, this cover structure being provided with acceptable aesthetics. One of the essential objectives of the present invention is to provide an improved cover structure, for a site emitting pollutants, preferably airborne, this cover structure, when it is applied to the road traffic lane cover, offers a travel and ecological space for pedestrians and cyclists.

[0019] One of the essential objectives of the present invention is to provide a simple and inexpensive construction method, of an improved cover structure, for a site emitting pollutants.

[0020] One of the essential objectives of the present invention is to provide a simple and inexpensive method of protecting the environment, in which an improved cover structure is involved, for a site emitting pollutants.

[0021]

One of the essential objectives of the present invention is to provide a simple, efficient and inexpensive method for cleaning up the environment of a pollutant emitting site, in which an improved cover structure is involved.

Disclosure of the invention

These objectives, among others, are achieved by the present invention which relates, firstly, to a cover structure for a site emitting pollutants, preferably airborne, comprising:

- a rigid frame fixed to the ground and / or resting on the ground;

- an envelope of the site emitting pollutants:

* said envelope forming a barrier - advantageously waterproof / insulating - to pollutants, and,

* at least part of this envelope consisting of inflatable and inflated frame elements

- links to secure the envelope to the frame;

- a system for filtering the site's atmosphere for pollutants.

[0023] It is to the inventor's credit for having designed and implemented a partially flexible and swollen cover structure, helping to give the whole rigidity and lightness. This particularity makes it possible to lighten the rigid frame which also ensures the mechanical strength of the cover structure.

The flexible, inflatable and inflated elements that make up the envelope form a barrier to noise and airborne nuisances. These are largely eliminated thanks to the filtration system. In the case of a traffic lane, is obviously open at these two ends to allow traffic. The fact remains that the emission of pollutants is significantly reduced. This cover structure is easy to build and dismantle. It is robust, durable, economical. On this last point, the cost of this structure could be 10 to 50 times lower than that of current solutions with similar characteristics. The cover structure according to the invention can be placed in sections on a traffic lane, which allows it to be put in place without blocking traffic for too long.

The cover structure according to the invention also has the advantage of being quickly removable at the end of its life.

It is much lighter than the massive blankets known to date, especially in terms of materials moved and used for construction. This makes it possible to significantly reduce its environmental impact.

The cover structure according to the invention can be likened to a tunnel with a flat ceiling (the envelope) made up of flexible, inflatable and inflated elements (beams) which are arranged to form a tight barrier to noise, to airborne nuisances (polluting gases, dust, particles, nanoparticles ...).

According to another of its aspects, the invention relates to a method of constructing a cover structure according to the invention, characterized in that it essentially consists in manufacturing and / or implementing the various constituent parts of this structure. , and especially :

- a rigid frame fixed to the ground and / or resting on the ground;

- an envelope of the site emitting pollutants:

- links to secure the envelope to the frame;

- a filtration system for the atmosphere of the pollutant emitting site.

[0025] According to another of its aspects, the invention relates to a simple, efficient and inexpensive method of protecting the environment consisting in at least partially covering a site emitting pollutants, preferably airborne, with the cover structure according to the invention.

According to another of its aspects, the invention relates to a simple, efficient and inexpensive method of cleaning up the environment of a site emitting pollutants (in particular in a built-up area), in which the cover structure is implemented. according to the invention.

The characteristics exposed in the following paragraphs can, optionally, be implemented. They can be implemented independently of each other or in combination with each other. According to a preferred characteristic of the invention, the frame supports the envelope by means of hangers.

In a preferred embodiment, the frame comprises, on the one hand, frames, preferably arches, the free ends of which are fixed to the ground and / or rest on the ground, and, on the other hand, longitudinal members connecting the arches between them.

The shape and dimensions of the hoops are advantageously chosen to allow the frame to span the envelope while leaving sufficient space in the envelope, for example to allow the movement of vehicles, and ideally sufficient space between the top of the envelope and frame to allow the possible passage of cyclists or pedestrians. The height of the frame must also ensure the load-bearing capacity of the structure.

In another aspect of this preferred embodiment:

- the envelope has a ceiling and at least one side wall;

- the ceiling includes inflatable and inflated frame elements;

- And, the wall or walls of the envelope comprise) a flexible material and / or inflatable and inflated reinforcing elements.

According to an interesting variant of this embodiment, the inflatable and inflated frame elements are parallel tubes, independent, integral with each other, to form a rigid frame; these tubes preferably being of circular section and inflated to a pressure chosen to achieve the mechanical strength of the frame, so that:

[Math. 1]

with:

DR: differential pressure of the tube; M: moment undergone by the tube; r: radius of the tube.

Reinforcement of the mechanical strength of the structure by means of the inflatable and inflated frame members can be achieved by the inflation pressure and / or other structural features of these frame members.

In a remarkable variant of the invention, the cover structure comprises a rigid superstructure, arranged between the ceiling and the upper part of the frame, this superstructure preferably being supported by the hangers connecting the frame to the envelope.

The invention is also distinguished in that it has at least one of the following features: (i) the cover structure comprises hangers which are cables, preferably metallic, and more preferably still faired cables;

(ii) the cover structure comprises inflatable and inflated reinforcing elements, the constituent material of which is chosen from the group comprising - ideally constituted by -: woven textiles, nonwoven textiles, composite materials and their combinations; the yarns of these materials preferably being selected from the group comprising - ideally constituted by polymers, in particular polyurethanes, poly-p-phenyleneterephthalamides, polyvinylchlorides, polyamides, and carbon fibers and their combinations;

(iii) the cover structure comprises inflatable and inflated frame elements which are fixed to each other by flexible links, integral or not, preferably integral with the frame elements;

(iv) the cover structure comprises, on the one hand, a frame comprising arches and side members connecting these arches, and, on the other hand, an envelope comprising a ceiling and at least one side wall both made up of elements of 'inflatable and inflated frame, which are made integral with the side members, by means of fasteners fixed to the frame elements and interlocking the side members;

(v) the cover structure comprises a frame made partly of arches, the ends of which are each fixed to a plinth, preferably a concrete base, buried in the ground;

(vi) the filtration system comprises at least one pre-filter, at least one electrostatic filter, ventilation and, preferably, auxiliary maintenance and cleaning members;

(vii) the superstructure includes pedestrian and / or cycle paths.

Definitions:

Throughout this presentation, any singular denotes either a singular or a plural.

The definitions given below by way of example can be used for the interpretation of this presentation:

“cover structure” designates a construction covering all or part and thus an entire pollutant-generating space.

“pollutant” designates a gaseous, particulate, sound, visual or olfactory nuisance of any kind.

"site emitting pollutants" designates in particular traffic routes such as highways, urban highways, peripherals, ring roads, urban boulevards, storage sites, in particular storage sites for dangerous compounds that emit dust or undesirable particles harmful to the health of residents living near these sites, large-scale ruminant breeding sites producing methane and foul odors, waste storage sites producing methane, foul odors and dust, work sites generating noise, odor, visual and particulate pollution. .. such as outdoor sites for painting, cutting, grinding, combustion, heating ...

“Substantially” corresponds to plus or minus 10%.

Brief description of the drawings

Other characteristics, details and advantages of the invention will become apparent on reading the detailed description below of examples of implementation of the method according to the invention by means of a preferred embodiment of the device. according to the invention, with reference to the accompanying drawings, in which:

Fig. l

[0030] [Fig. 1] is a general perspective view of a preferred embodiment of the cover structure according to the invention.

Fig. 2

[0031] [Fig. 2] is a rear face view of the cover structure of FIG. 1.

Fig. 3

[0032] [Fig. 3] is a left side view of the cover structure of Figure 1.

Fig. 4

[0033] [Fig. 4] is a perspective view of a detail of FIG. 1 showing 2 inflatable and inflated reinforcement elements (beams) constituting the ceiling of the envelope of the cover structure according to the invention, 2 inflatable reinforcement elements and inflated (beams) constituting a wall of this envelope and the connection of these 4 elements with a spar connecting 2 arches of the frame of the structure.

Fig. 5

[0034] [Fig. 5] is a perspective view showing, in isolation, an inflatable and inflated beam of the ceiling of the envelope.

Fig. 6

[0035] [Fig. 6] is a detail view of FIG. 5.

Fig. 7

[0036] [Fig. 7] is a perspective detail view showing, in isolation, a part of the inflatable and inflated beam of one end of the envelope ceiling.

Fig. 8 [0037] [Fig. 8] is a perspective view showing, in isolation, the connection between 2 inflatable and inflated beams of the envelope ceiling.

Fig. 9

[0038] [Fig. 9] is a detail perspective view, showing the junction between 2 successive side members and an arch of the frame, according to magnifying glass IX in FIG. 1.

detailed description

[0039] A preferred embodiment of the cover structure according to the invention is described below by way of non-limiting example.

Figures 1 to 3 show a cover structure 1 according to the invention, installed on a site 2 emitting pollutants, in this case a road traffic lane.

This cover structure 1 consists of:

* a rigid frame 3 fixed to the ground located substantially at the same level as lane 2 of road traffic;

* a casing 10 linked to the frame 3 and forming a waterproof and insulating barrier, on the top and on the sides, to pollutants, namely, in particular, exhaust gases, fine particles, unpleasant odors and noise generated by traffic road;

* a filtration system 20 designed to capture these pollutants;

* a superstructure 30 formed by a pedestrian / cycle platform arranged above the envelope 10.

The rigid frame 3 is composed of frames 4, in this case the arches 4, the ends 41 and 42 of which are, in this embodiment, each fixed to the ground by bolting on a concrete base embedded in the ground (not shown in the figures).

The arches 4 are distributed uniformly over the length of the road site 2 and are interconnected by side members 5. In this preferred embodiment exemplified here, support beams 6 are provided at each junction between the side members 5 and the arches 4 .

As shown in FIG. 9, the attachment at each junction, of the lower and upper parts of the arch 4, of 2 successive longitudinal members 5 and of the upper end of the support beam 6, is carried out by clamps 70 fixed 2 to 2, for example by bolting. A fraction of these flanges 70 equip the end parts 71:

* the lower and upper regions of the arch 4,

* of the two successive side members 5

* and the upper end of beam 6.

These end parts 71 have cross sections of smaller dimension to those of the arches 4, of the side members 5 and of the beam 6 to which they belong.

The other fraction of these flanges 7 is found on a connecting piece 72 with five branches.

The side members 5 define, on the one hand, the lower terminal rectilinear parts of the arches 4 fixed to the ground, and, on the other hand, the arched upper parts of the arches 4. This bending allows the rigid frame 3 to span the envelope 10 for capturing pollutants. The tops of the arches are at a sufficient height to leave room for the superstructure 30 on which pedestrians and cyclists can circulate and to ensure the bearing capacity of the entire cover structure. The arches 4 make it possible, in doing so, to maintain the entire structure under the load of its own mass, whatever the climatic hazards such as snow and wind, as well as any pedestrians or cyclists traveling on the superstructure 30 Hangers 8 fixed to the curved upper parts of the hoops 4 are connected to the envelope 10 for collecting pollutants, form links allowing the rigid frame 3 to support this envelope 10.

The side members 5 not only ensure the holding of the arches 4 but also serve as anchoring bars to the casing 10.

All the elements 4, 5, 6 of this rigid frame 3 can be, for example, metal tubes or wooden planks, preferably stainless steel tubes.

The diameter of an arch 4 is, for example, between 0.2m and 2m, preferably between 0.8m and 1.2m. The total length of an arch 4 is for example between 10 m and 50 m, preferably between 20 m and 40 m.

The maximum height of an arch is for example between 5m and 30m, preferably between 10m and 15m.

The diameter of a spar 5 is for example between 0.2m and 2m, preferably between 0.8m and 1.2m.

The total length of a spar 5 is for example between 5m and 50m, preferably between 15m and 30m.

The diameter of a beam 6 is for example between 0.2m and 2m, preferably between 0.8m and 1.2m. The height of a beam 6 is for example between 0.1m and 10m, preferably between 4m and 6m.

The lines 8 are advantageously steel cables, preferably streamlined to limit the impact of the wind on them.

[0042] According to a variant of the invention, the lowest level of the site 2 emitting pollutants, for example a road traffic lane, perhaps underground. In this case, the supporting beams 6 are low in height or are absent. The side members 5 are then closer to the ground. The rigid frame 3 can thus be fixed to the ground and / or rest on the ground, via the connecting pieces 72.

According to another possibility, the rigid frame 3 can be connected to the ground by means of a retaining wall.

Figure 1 which shows the overall view of the cover structure 1 shows only the part of the casing 10 disposed between two of the three arches 4 of the rigid frame 3. As shown in Figures 1, 2 and 3, the envelope 10 for capturing the pollutants emitted by the road site 2, comprises a ceiling 11 and two longitudinal side walls 12,13. In this exemplary embodiment, the ceiling 11 and the walls 12, 13 are formed by reinforcing elements 110, 120, 130 made of flexible material, which are inflatable and inflated to a differential pressure DR judiciously chosen, before the construction of the cover structure 1. More precisely, these frame elements 110, 120, 130, are independent parallel tubes, firmly secured to each other to form a rigid assembly.

The differential pressure DR of each tube 110, 120, 130 can be approximated by the formula:

[Math. 1]

2 x M

DR

pxr ³

with DR: differential pressure of the tube; M: moment undergone by the tube; r: radius of the tube 110, 120, 130.

In practice, DR may be between 0.01 and 5 bars, preferably between 0.5 and 1.5 bars.

The flexible material of these tubes 110, 120, 130 has good resistance to abrasion, to tearing ("ripstop"), to fire, to deliberate degradation and to UV radiation, among others. This flexible material may be a composite, a woven or a non-woven polyurethane, poly- p-phenyleneterephthalamide (kevlar®), carbon fibers and / or threads or carbon derivatives, polyvinyl chloride ( PVC), polyamide (nylon ®) or a combination of these different materials. The flexible material can be coated with one or more protective layers. It can be glued or coated.

It may be, as in this exemplary embodiment, a woven fabric of polyvinyl chloride (PVC).

By way of illustration of available commercial products, it is possible to cite the inflatable / inflated tubular beams marketed by the company Prospective Concepts AG under the name Tensairity®.

The dimensions of the tubes 110 of the ceiling 11 can be as follows: length included between 5m and 100m, preferably between 20m and 35m; diameter between 0.2m and 2m, preferably between 0.8m and 1.2m.

The dimensions of the tubes 120 & 130 of the walls 12 and 13 can be as follows: length between 1m and 10m, preferably between 4m and 8m; diameter between 0.2m and 2m, preferably between 0.8m and 1.2m.

As shown in the figures, in particular Figures 4,5,6 and 8, the connection between the tubes 110, on the one hand, and between the tubes 120 or 130, on the other hand, is effected by means of flexible links 14, extending tangentially with respect to the tubes 110, 120, 130. Each tube 110, 120, 130 has two sets of flexible links 14, diametrically opposed. Each flexible link 14 of a tube 110, 120, 130, corresponds and is aligned with a connection point 15 provided on the "links 14 / attachment points 15" assembly of the adjacent tube 110, 120, 130. In this way, each flexible link 14 of a tube 110, 120, 130 can be attached to the corresponding connection point 15 of the adjacent tube 110, 120, 130. As shown in Figures 5, 6, 8, the links flexible 14 and the connection points 15 of each “links 14 / attachment points 15” assembly of a tube 110, 120, 130, are staggered.

The method of locking a flexible link 14 of a tube 110, 120, 130 on the connection point 15 of the neighboring tube 110, 120, 130, can be of the screw / nut, rivet, belt buckle, strap type. ratchet, lacing, hooking, knot ... This method of fixing advantageously allows adjustment, during assembly, of the tension applied between the tubes.

As shown in Figures 4 and 9, the tubes 110, 120, 130 are provided at at least one of their ends with at least one fastener 16 - in this case one at each end for the tubes 110 of the ceiling 11 and one at the upper end of the tubes 120,130 of the walls 12,13- These end fasteners 16 allow the corresponding spar 5 to be wrapped around and the tubes 110, 120, 130 to be securely fixed to the spars 5. The closure of each attachment 16 around the side member 5 can be made in one of the following ways: screw / nut, rivet, belt buckle, ratchet strap, lacing, hooking, knot ... This method of attachment advantageously allows adjustment, when the assembly, the tension applied between the tubes and the spar ...

Referring to Figures 1, 2 & 7, it appears that the fins 17 are fixed on top of the inflatable and inflated tubes 110 of the ceiling 111, which are located substantially in line with the arches 5. These fins 17 each comprise an opening 18 (Figure 7) through which is engaged or can be engaged, the lower end of a hanger 8, which can thus be securely attached to the fin 17. This attachment can be made in one of the following ways : The end of the line can be fitted with an eye clevis, a thimble, a shackle, a quick link or a combination of these different elements, coming from hook into the opening 18.

The fins 17 can be textile elements, for example of the same nature as the flexible material constituting the tubes 110. It can be made simply of textile, or be reinforced over its entire surface, in aluminum for example, or simply around the opening 18, to accommodate the metal element of the hanger forming the interface. These textile elements are sewn, glued or welded to the top of the tubes 110 and, more precisely, to the “links 14 / fixing points 15” assembly of the tube 110. Each fin 17 is also secured to a strapping 19, by example of textile or metal, of the tube 110, so as to take up the force of the corresponding hanger 8 over the entire periphery of the tube 110. In this exemplary embodiment, there are 6 hangers 8 per arch connected to the fins 17 to the tube. 110 vertically, to ensure the suspension of the casing 10 from the rigid frame, by distributing 3.

This flexible and inflated envelope 10 contributes to the rigidity of the cover structure. It allows the capture of a large part of the pollutants generated by road site 2, which it covers. The cover structure 1 according to the invention thus makes it possible to obtain a safe construction with sufficient reach to be maintained in a durable manner on large polluting sites.

According to one possibility of the invention, the side walls 12,13 can be matched with a plastic or metal protection, for example sheets, in particular at accessible places, in order to protect the cover structure 1 from voluntary damage. According to another possibility of the invention, these side walls can be constituted by non-inflatable walls, made from flexible material, of the same nature or not as that of the inflatable and inflated tubes 110,100 20,130.

The superstructure 30 shown in Figures 1 to 3, is a road equipment for pedestrians and cyclists. This equipment can be connected to the rest of the pedestrian and cycling network located at ground level, by access ramps. In the present exemplary embodiment, this equipment 30 is provided with barriers 31 delimiting the pedestrian and cycle paths.

The filtration system 20 shown schematically in Figures 1 to 3 comprises means for capturing pollutants, ventilation, filtration, and exhaust pipes of the filtered air to the outside or inside of the cover structure 1.

The filtration advantageously comprises a pre-filter and an electrostatic filter.

Auxiliary parts for maintenance and cleaning of the system are also provided.

As an example of known systems available on the market, mention may be made of the ECCO ® system from Aigner. List of reference signs

[0046] - 1-: cover structure; -2-: site emitting pollutants; -3-: rigid frame; -4- frames / arches, 5: side members, 6: support beams, 70: flanges; 71: end sections of arches 4 / side members 5 / beams 6; 72: connecting piece; 8: lines, 9 :, 10: inflatable and inflated envelope; 11: ceiling of envelope 10; 12, 13- side walls of the casing 10; 110: inflatable and inflated tubes from the ceiling; 120: inflatable and inflated tubes of the side wall 12; 130: inflatable and inflated tubes of the side wall 13; 14: tangential flexible link of a tube 110,120,130; 15: points of connection with links 14; 16: end attachment for tubes 110, 120, 130; 17: fins for fixing the hangers 8 on the tubes 110, 120, 130; 18: opening in fin 17; 19: strapping integral with the fin 17; 20: filtration system; 30: superstructure; -31-: road barrier included in the superstructure 30.

Claims

[Claim 1]

Cover structure (1) for a site (2) emitting pollutants, preferably airborne, comprising:

- a rigid frame (3) fixed to the ground and / or resting on the ground;

- an envelope (10) of the site (2) emitting pollutants:

* said envelope (10) forming a barrier - advantageously waterproof / insulating - to pollutants, and,

* at least part of this envelope (10) consisting of elements (110, 120, 130) of inflatable and inflated reinforcement;

- Links (8, 14, 15, 16) for securing the envelope (10) to the frame (3);

- a system (20) for filtering the atmosphere of the site (2) emitting pollutants.

[Claim 2]

Cover structure (1) according to Claim 1, characterized in that the frame (3) supports the envelope (10) by means of hangers (8).

[Claim 3]

Cover structure (1) according to Claim 1 or 2, characterized in that the frame (3) comprises, on the one hand, frames (4), preferably arches (4), the free ends of which are fixed to the ground and / or rest on the ground, and, on the other hand, side members (5) connecting the arches (4) to each other.

[Claim 4]

Cover structure (1) according to at least one of the preceding claims, characterized in that

- the casing (10) comprises a ceiling (11) and at least one side wall (12,13);

- the ceiling (11) comprises inflatable and inflated frame elements (110);

- And, the wall (s) (12, 13) of the casing (10) comprises (s) a flexible material and / or elements (120, 130) of inflatable and inflated reinforcements.

[Claim 5]

Cover structure (1) according to Claim 4, characterized in that the elements (110, 120, 130) of inflatable and inflated frame elements (110, 120, 130) are parallel, independent, integral with each other, to form a rigid frame (10); these tubes (110, 120, 130) preferably being of circular section and inflated to a pressure chosen to achieve the mechanical strength of the reinforcement, such that: [Math. 1]

2 x M

^Dr = -?

p x

with:

[Claim 6]

Cover structure (1) according to at least one of the preceding claims, characterized in that it comprises a rigid superstructure (30), arranged between the ceiling (11) and the upper part of the frame (3), this superstructure (30 ) preferably being supported by the hangers (8) connecting the frame (3) to the casing (10).

[Claim 7]

Cover structure (1) according to at least one of the preceding claims, characterized by at least one of the following features:

(i) the cover structure (1) comprises hangers (8) which are cables, preferably metallic, and more preferably still faired cables;

(ii) the cover structure (1) comprises inflatable and swollen frame elements (110, 120, 130), the constituent material of which is chosen from the group comprising - ideally consisting of -: woven textiles, nonwoven textiles , composite materials and their combinations; the yarns of these materials preferably being selected from the group comprising - ideally constituted by polymers, in particular polyurethanes, poly-p-phenyleneterephthalamides, polyvinyl chlorides, polyamides, and carbon fibers and their combinations;

(iii) the cover structure (1) comprises inflatable and inflated frame elements (110, 120, 130) which are fixed to each other by flexible links (14), integral or not, preferably integral, elements (110, 120, 130) of reinforcement;

(iv) the cover structure (1) comprises, on the one hand, a frame (3) comprising arches (4) and side members (5) connecting these arches (4), and, on the other hand, the casing (10) comprising a ceiling (11) and at least one side wall (12,13), the ceiling (11) and the side wall (12,13) both consisting of elements (110, 120, 130) d 'frame inflatable and inflated, which are made integral with the side members (5), by means of fasteners (16) fixed to the frame elements (110, 120, 130) and embracing the side members

(5);

(v) the cover structure (1) comprises a frame (3) made in part of arches (5), the ends of which are each fixed to a base, preferably a concrete base, buried in the ground;

(vi) the filtration system (20) comprises at least one pre-filter, at least one electrostatic filter, ventilation and, preferably, auxiliary maintenance and cleaning members;

(vii) the superstructure (30) includes pedestrian and / or cycle paths.

[Claim 8]

Method of constructing a cover structure (1) according to at least one of the preceding claims, characterized in that it consists essentially in manufacturing and / or implementing the various constituent parts of this structure (1), and, in particular:

- a rigid frame (3) fixed to the ground and / or resting on the ground;

- an envelope (10) of the site (2) emitting pollutants:

* at least part of this envelope (10) consisting of inflatable and inflated frame elements (110, 120, 130)

- links (14,15,17) to secure the casing (10) to the frame (3);

- a system (20) for filtering the atmosphere of the site (2) emitting pollutants. [Claim 9]

Method for protecting the environment, characterized in that it consists in at least partially covering a site (2) emitting pollutants, preferably airborne, with the cover structure (1) according to at least one of claims 1 to 7 [Claim 10] A method of cleaning up the environment of a pollutant emitting site, in which the cover structure (1) according to at least one of claims 1 to 7 is used.