Wall of a tank for storing a fluid and method for mounting such a wall

Abstract

The present invention relates to a wall (8) of a tank for storing at least one fluid, the wall (8) comprising a shell (2) and at least one panel (10) kept at a distance from the shell (2) by at least one anchoring element (14) holding the panel (10) relative to the shell (2) by defining an area between the shell (2) and the panel (10), the area being at least partially filled with a filling material (12), the wall (8) comprising a sealing membrane (22) bearing against the panel (10) being arranged opposite the filling material (12) relative to the panel (10).

Description

[0001] DESCRIPTION

[0002] Title of the invention: Wall of a fluid storage tank and method of mounting such a wall

[0003] The present invention relates to the field of walls having surface irregularities and requiring leveling, and more particularly to a wall of a fluid storage tank.

[0004] Fluids such as those from the petroleum industry, such as gas or refined oil, are typically stored in tanks. Storage of such fluids may, for example, be necessary to ensure the transportation of fluids by land on trucks or by sea on ships. In other situations, storage of these fluids may, for example, be carried out for permanent storage as a reserve or temporary storage for distribution, such as at a gas station.

[0005] It is known to manufacture tanks, particularly from concrete, and bury them underground to form fluid storage areas. However, these tanks deteriorate over time because the concrete they are made of crumbles. Such deterioration of the tank shell leads to leaks which, in the case of the storage of fluids from the oil industry, can cause environmental damage, particularly soil pollution.

[0006] When leaks are found or the risk of leaks appears too high, it is known to repair or reinforce the casing, for example by fixing panels against the casing to ensure the watertightness of the tank. These panels are supported against the casing to be repaired using mastic. However, this method is not suitable when the surface of the casing to be repaired has surface irregularities of an amplitude greater than 40 mm.

[0007] The present invention falls within this context and proposes a new means of sealing a defective casing by providing a new sealed tank wall even if the casing to be repaired has surface irregularities greater than 40 mm in magnitude. Thus, the present invention relates to a wall of a tank for storing at least one fluid, the wall comprising a casing and at least one panel held at a distance from the casing by at least one anchoring element which holds the panel relative to the casing by delimiting an area between the casing and the panel, the area being at least partly filled by a filling material, the wall comprising a sealing membrane bearing against the panel, being arranged opposite the filling material relative to the panel.

[0008] The wall comprises a shell which may be formed of concrete, metal, or a combination of concrete and metal. This shell has a face facing the inside of the tank and on which at least one anchoring element is fixed. This anchoring element makes it possible to support a panel and more specifically to keep it at a distance from the shell by delimiting a space between the shell and the panel. It is understood that the panel comprises a face facing the shell and a face facing the inside of the tank. The area is delimited between the face of the shell facing the inside of the tank and the face of the panel facing the shell.

[0009] The filling material which at least partially fills said area makes it possible to ensure in particular a certain mechanical resistance, in combination with the anchoring elements, against the compressive stresses which the fluid contained in the tank could exert against the wall of the tank.

[0010] The casing comprises surface irregularities of an amplitude greater than 40 mm. It is understood here that the surface of the casing has a succession of projections and hollows, the distance between at least one bottom of the hollow and a top of a projection adjacent to each other of which is greater than 40 mm. This distance, which defines the amplitude of the surface irregularities, is measured parallel to the shortest segment passing through the center of the tank delimited at least in part by the wall and by the surface irregularity. In addition, the sealing membrane resting against the panel makes it possible to make the wall of the tank watertight. In other words, the sealing membrane makes it possible to prevent the fluid contained in the tank from reaching the casing of the zone.

[0011] It is understood from the above that the panel participating in delimiting the zone acts as a formwork element allowing, on the one hand, the filling material to be deposited between the envelope and the panel and, on the other hand, to support the waterproofing membrane resting against said panel, i.e. pressed against the panel.

[0012] According to a characteristic of the invention, the wall comprises a waterproof layer arranged between the envelope and the filling material. This waterproof layer makes it possible to at least limit the penetration of fluid through the face of the envelope facing the outside of the tank. It is understood that the waterproof layer is in contact with the filling material. In addition, it is understood that said filling material is contained between the panel and the waterproof layer. Such a layer is a film which prevents fluid from rising from the outside of the envelope to the inside thereof.

[0013] According to a characteristic of the invention, the panel kept at a distance from the envelope is a secondary panel, the wall comprising a primary panel bearing against the waterproofing membrane.

[0014] According to a characteristic of the invention, the waterproofing membrane bearing against the panel is a secondary waterproofing membrane, the wall comprising a primary waterproofing membrane bearing against the primary panel.

[0015] It is understood that the wall is formed of at least one panel on which a waterproofing membrane is supported. In the present case, the wall comprises two panels and two waterproofing membranes. More specifically, the wall comprises a secondary panel on which a secondary waterproofing membrane is supported with a primary panel supported on the secondary waterproofing membrane on which a primary waterproofing membrane is supported. Such a superposition of elements makes it possible to provide the wall with a double seal in the event that a leak occurs on one of the waterproofing membranes. According to a characteristic of the invention, the filling material comprises at least in part a synthetic foam. According to one example, the synthetic foam is an expanding foam, that is to say a foam whose volume increases after being injected.

[0016] According to a characteristic of the invention, the synthetic foam is thermally insulating.

[0017] According to a feature of the invention, the filling material comprises at least in part a resin loaded with particles. Such a resin has the advantage of maintaining a substantially identical volume when the filling material is poured. A filling material formed from a resin loaded with particles also has higher mechanical strength than expanding foams. Indeed, by increasing the particle loading rate within the resin, it is possible to reduce the quantity of resin required and thus limit the cost of the filling material used.

[0018] According to a characteristic of the invention, the sealing membrane comprises at least a first plate and a second plate, the first plate extending in a plane intersecting a plane in which the second plate extends, the sealing membrane comprising a membrane bridge which connects the first plate and the second plate in a sealed manner. It is understood that the primary sealing membrane, like the secondary sealing membrane, is formed of a succession of plates bearing against a panel. This shape taken by the primary and secondary sealing membranes advantageously makes it possible to match the shape of the tank, in particular in the case where the tank is a cylindrical tank.

[0019] According to an optional feature of the invention, the membrane bridge comprises at least one corrugation. This corrugation of the membrane bridge allows the membrane equipped with it to withstand deformation stresses, in particular following the expansion of the wall or the contraction of the latter under the thermal effects of the fluid stored in the tank. According to one example, at least one plate of the sealing membrane, and advantageously each of the plates of the sealing membrane, is entirely flat, that is to say devoid of a wave or corrugation similar to that which the membrane bridge comprises.

[0020] It should be noted that alternatively the said planes can be confused, in particular in the case where the tank has a cubic shape within which the envelope comprises flat sides.

[0021] The present invention also relates to a method of mounting a wall of a storage tank for at least one fluid using:

[0022] - at least a first stage during which anchoring elements are secured to the envelope,

[0023] - at least one second step during which the at least one panel is made integral with the envelope by means of the anchoring elements,

[0024] - at least a third step during which the filling material is placed in the area delimited between the envelope and the panel.

[0025] It is understood that the second step of the assembly process is a formwork step. This formwork step makes it possible to delimit the area intended to receive the filling material, said area being delimited by at least the envelope and at least one panel.

[0026] It should be noted that "arranged" means that the filling material is, for example, poured, or injected, between the face of the casing facing the inside of the tank and the face of the panel facing the casing.

[0027] According to a characteristic of the invention, the assembly method implements a step prior to the first step during which the envelope is analyzed to measure the surface irregularities of said envelope, the anchoring elements being arranged so as to correct the surface irregularities measured during this step prior to the first step.

[0028] This analysis of the envelope makes it possible to correct the surface irregularities of said envelope. It is understood that in the case where the present invention is used on an envelope which has undergone alterations to its surface, the analysis of said surface of the envelope makes it possible to position the anchoring elements so as to level the panels.

[0029] According to a feature of the invention, the mounting method is implemented when the surface irregularities of the casing are greater than 40 mm. Such a distance is measured between two circles whose center corresponds to the center of the tank. A first circle passes through a point of the casing furthest from the center of the tank and a second circle passes through a point closest to this center of the tank. The distance is measured along a radius of these circles, being measured between these two circles.

[0030] It should be noted that the present invention can be implemented with a tank with flat walls, for example a square or rectangular tank. In such a case, the surface irregularities are measured between a first plane which passes through a point of the envelope furthest from the center of the tank and a second plane which passes through a point closest to this center of the tank. The distance of a surface irregularity is then a segment which separates these two planes, measured perpendicular to the first and / or the second plane.

[0031] According to a characteristic of the invention, the assembly method comprises a step prior to the first step during which the waterproof layer is placed against the casing of the tank. Such a layer is for example sprayed so as to form a film, for example of a resin.

[0032] When the wall comprises a plurality of panels, the method provides that the first step and the second step are repeated so as to arrange the panels next to each other to form a ring of panels. It is understood that the third step of the assembly method is implemented once the ring of panels has been formed. In other words, once the ring of panels has been formed, the filling material is arranged between the envelope and the panels and then a new ring of panels is formed.

[0033] According to a characteristic of the invention, the assembly method comprises a fourth step during which the first plate is made integral with a panel and the second plate is made integral with an adjacent panel, the assembly method implementing a fifth step during which the membrane bridge is secured in a sealed manner with the first plate and the second plate.

[0034] Other characteristics, details and advantages of the invention will emerge more clearly on reading the description which follows on the one hand, and examples of embodiment given for informational and non-limiting purposes with reference to the appended schematic drawings on the other hand, in which:

[0035] [Fig.l] represents a schematic view of a profile of one face of an envelope facing the interior of a tank;

[0036] [Fig.2] represents a sectional view of a wall according to the invention;

[0037] [Fig.3] represents an exploded view of the wall according to one embodiment of the invention;

[0038] [Fig.4] represents a view illustrating the juxtaposition and superposition of the panels forming the wall according to the invention;

[0039] [Fig.5] represents a view of the wall according to the invention from inside the tank;

[0040] [Fig.6] represents a sectional view of the wall illustrated in Figure 5.

[0041] It should first be noted that while the figures set out the invention in detail for its implementation, these figures can of course be used to better define the invention, where appropriate. It should also be noted that these figures only set out examples of embodiments of the invention.

[0042] The features, variants and different embodiments of the invention may be combined with each other in various combinations, provided that they are not incompatible or mutually exclusive. In particular, variants of the invention may be conceived comprising only a selection of features described below in isolation from the other features described, if this selection of features is sufficient to confer a technical advantage or to differentiate the invention from the state of the art. In the figures, elements common to several figures retain the same reference. In addition, elements hidden behind other elements appear in dotted lines.

[0043] Figure 1 very schematically represents a casing 2 of a storage tank for at least one fluid on which the present invention is capable of acting. More particularly, this figure 1 represents the profile of a face of the casing 2 facing the inside of the tank. It should be noted that in the embodiment shown and without this being limiting of the invention, the fluid stored in the tank is a fluid in the liquid state from the petroleum industry, such as refined petroleum or “LNG” acronym for liquefied natural gas.

[0044] The casing 2 of the tank has surface irregularities relative to a reference profile 4 representing a median surface of the casing 2 of the tank.

[0045] The surface irregularities present on the envelope 2 are distinguished by portions of said face of the envelope 2 which deviate from the reference profile 4. Some of the differences between said face of the envelope 2 and the reference profile 4 are, in the embodiment shown, greater than 40 mm. Thus, as visible in FIG. 1, certain surface irregularities of the envelope 2, such as the surface irregularity represented by a double arrow 6, are greater than 40 mm. It should be noted that this measured distance of the surface irregularities, and represented by the double arrow 6, corresponds to the distance which separates a first circle 40 passing through the top of an irregularity from a second circle 41 passing through the bottom of an irregularity. This distance is measured along the radius of one or other of these circles.Figure 1 is intended to illustrate the irregularities that the invention can handle, but the shapes or positions illustrated here are given only as examples.

[0046] Figure 2 schematically represents a local view of the casing 2 at which the surface irregularities of the casing 2 are corrected so as to be able to install a sealed structure on the face of the casing 2 facing the inside of the tank.

[0047] More specifically, Figure 2 represents the assembly of a wall 8 according to the invention.

[0048] This wall 8 comprises at least the casing 2, a panel 10 and a sealing membrane bearing against the panel 10. A filling material 12 is arranged between the casing 2 and the panel 10, the panel 10 being installed on the side of the face of the casing 2 facing the inside of the tank. The sealing membrane, which will be described in more detail in connection with FIG. 3, is arranged opposite the filling material 12 relative to the panel 10.

[0049] During the assembly of the wall 8, anchoring elements 14 are secured to the envelope 2, for example by being inserted into it. The panel 10 is positioned on these anchoring elements 14 so as to be kept at a distance from the envelope 2 by means of said anchoring elements 14. This distance which separates the panel 10 from the envelope 2 is at least 40 mm, but the invention aims at a distance of between 40 mm and 250 mm.

[0050] As can be seen in figures 2 or 6, the panel 10 is more specifically positioned on a head of said anchoring elements 14, opposite the part of the anchoring elements 14 housed in the envelope 2. Each head of the anchoring elements 14, supporting the same panel 10, is advantageously located at a distance from the envelope 2 so as to reconstitute a profile close to the first circle 40 previously mentioned.

[0051] The positioning of the panel 10 on the heads of the anchoring elements 14 makes it possible to generate a zone 16 between the panel 10 and the envelope 2. The zone 16 is then at least partly filled by the filling material 12. In the embodiment shown, the filling material 12 is at least partly formed of a synthetic foam poured or injected into the zone 16 by a supply pipe 18. The panel 10 forms a structural element arranged directly opposite the envelope 2. Such a configuration allows the panel 10 to delimit the zone 16 between the envelope 2 and the panel 10.

[0052] It should be noted that in this embodiment shown, the filling material is advantageously thermally insulating, which is an advantage when the tank contains, for example, LNG, ammonia, LPG; and generally any fluid stored in the liquid state at a temperature below -50°C at atmospheric pressure. In an alternative or complementary embodiment, the filling material 12 is at least partly formed from a resin loaded with particles. This resin may, as illustrative and non-limiting examples of the invention, be an epoxy resin, a vinylester resin, a polyester resin or even a polyurethane resin. Within this resin, the particles which constitute the filler are preferably glass beads or hollow glass beads.As illustrative and non-limiting examples of the invention, the particles constituting the filler of the resin may be balls of clay, sand, vermiculite or be recovered particles originating for example from crushed concrete, tires or even composites. Such resins loaded with particles have a substantially equal volume when the filling material 12 is poured. The filling material 12 is poured angularly between the envelope 2 and several panels 10. As a result, there is an angular continuity of the filling material 12 on several adjacent panels 10. This angular continuity is remarkable by the absence of a cut in the filling material 12 at the junction between two juxtaposed panels 10.

[0053] Furthermore, the wall 8 also comprises a waterproof layer 20 arranged between the casing 2 and the filling material 12. More specifically, this waterproof layer 20 is, in the embodiment shown, pressed against the casing 2 and makes it possible to at least limit the penetration of fluids from outside the tank, such as water.

[0054] It is understood from the above that the invention implements an assembly method during which the anchoring elements 14 are secured to the envelope 2 during a first step. Then, during a second step, the panel 10 is made integral with the envelope 2 by means of the anchoring elements 14. The filling material 12 is then placed in the zone 16 delimited between the envelope 2 and the panel 10.

[0055] It should be noted that the method for mounting the wall 8 also implements a step prior to the first step. This step prior to the first step makes it possible to position, as mentioned previously, the anchoring elements 14 so as to reconstitute the profile of the first circle 40. More precisely, during this step prior to the first step, the face of the casing 2, facing the inside of the tank, is analyzed to measure the surface irregularities of the casing 2. This analysis of the casing 2 can, by way of illustrative and non-limiting example, be carried out by means of a laser analysis recognition device connected to a computer modeling device. This analysis of the face of the casing 2 facing the inside of the tank makes it possible to position the anchoring elements 14 during the first step and to adjust them so as to correct the surface irregularities.Such an adjustment can, for example, result from anchoring elements of different lengths. This adjustment can also be made by inserting the anchoring element more or less into the envelope 2.

[0056] It should also be noted that the method of mounting the wall 8 also implements another prior step during which the waterproof layer 20 is projected against the casing 2 of the tank. It is understood that this step is preferentially and where appropriate implemented after the step of analyzing the face of the casing 2 facing the inside of the tank, so as to allow an optimal analysis of the casing 2.

[0057] Figure 3 highlights the structure of the wall 8 according to one embodiment of the invention. As visible in this figure, the panel 10, which is held at a distance from the envelope 2 by the anchoring elements 14 and on which the waterproofing membrane 22 is supported, is a secondary panel 10. Indeed, the wall 8 also comprises a primary panel 24 coming to bear against the waterproofing membrane 22. It should also be noted that, in the embodiment shown, said waterproofing membrane 22 is a secondary waterproofing membrane 22. Indeed, the wall 8 also comprises a primary waterproofing membrane 26 coming to bear against the primary panel 24.

[0058] Thus, according to the embodiment represented in particular by Figure 3, the wall 8 successively comprises, from the casing 2 towards the interior of the tank, the waterproof layer 20, the filling material 12, the secondary panel 10, the secondary waterproofing membrane 22, the primary panel 24 and the primary waterproofing membrane 26. The waterproofing membrane 22 or secondary waterproofing membrane 22 comprises at least a first plate and a second plate. In the embodiment represented by Figure 3, only one of the two aforementioned plates is shown.

[0059] The secondary sealing membrane 22 also comprises a membrane bridge 30 for sealingly connecting the first plate and the second plate. It should be noted that this membrane bridge 30 will be described in more detail in connection with FIGS. 4, 5 and 6.

[0060] The primary sealing membrane 26 comprises at least a first plate and a second plate. In the embodiment shown in FIG. 3, only one of the two aforementioned plates is shown. The primary sealing membrane 26 also comprises a membrane bridge 30 for sealingly connecting the first plate and the second plate. It should be noted that this membrane bridge 30 will be described in more detail in connection with FIGS. 4, 5 and 6.

[0061] Figure 4 schematically represents the wall 8 of a fluid storage tank in accordance with the invention. It should be noted that in this figure 4, the casing 2, the waterproof layer 20, the filling material 12 and the secondary panel 10 are not shown to leave only the sealing membrane 22, 26 visible. In other words, the visible face of the sealing membrane 22, 26 is the face intended to bear against the secondary panel 10. It should also be noted that in the embodiment represented by figure 4, the tank is circular in shape. Of course, the tank could, without departing from the scope of the invention, have other shapes and in particular a parallelepiped shape or a cubic shape.

[0062] As mentioned previously, the sealing membrane 22, 26 comprises a first plate 32 and a second plate 34. This first plate 32 is flat and extends in a plane intersecting a plane in which the second plate 34 extends, the latter also being flat. The membrane bridge 30 makes it possible to make the junction between the first plate 32 and the second plate 34, this junction being carried out in a sealed manner.

[0063] Furthermore, Figure 4 highlights a characteristic of the method of mounting the wall 8. In fact, the first step and the second step of the mounting method are repeated so as to arrange the panels next to each other to form a ring 36 of panels.

[0064] It is understood that each panel 10 is positioned next to another panel 10 to form a ring 36 of panels. The panels 10 are also superimposed on top of each other so that the rings 36 of panels are also superimposed on top of each other and line the envelope 2.

[0065] Figure 5 represents a view of the wall 8 and more particularly of the primary sealing membrane 26 bearing against the primary panel 24. As visible in Figure 5, the primary sealing membrane 26 is held integral with the primary panel 24 by means of the stud 28. This stud 28 keeps the primary sealing membrane 26 pressed against the primary panel 24.

[0066] Furthermore, this figure 5 makes it possible in particular to highlight a fourth step and a fifth step of the method of mounting the wall 8. Indeed, during the fourth step of the mounting method, the first plate 32 is made integral with a panel, in this case the primary panel 24, and the second plate 34 is made integral with another adjacent panel, in this case another primary panel 24. During a fifth step of the method of mounting the wall 8, the membrane bridge is secured in a sealed manner to the first plate 32 and the second plate 34. Such a securing can be carried out by welding an edge of the membrane bridge 30 to a face of the plate against which the membrane bridge 30 is pressed.

[0067] It should be noted that what has just been described in connection with the primary waterproofing membrane 26 applies mutatis mutandis to the secondary waterproofing membrane 22. In other words, the secondary waterproofing membrane 22 is formed, like the primary waterproofing membrane 26, of a first plate 32 made integral in the present case with a primary panel 10, and of a second plate 34 made integral with another adjacent primary panel 10, a membrane bridge 30 being secured in a sealed manner to said first plate 32 and to said second plate 34. Figure 6 represents a sectional view of the wall 8 along a section AA visible in Figure 5. This Figure 6 makes it possible to make more clearly visible the superposition of the different elements forming the wall 8. More specifically, Figure 6 makes it possible to highlight a corrugation 38 of the membrane bridge 30.This undulation 38 of the membrane bridge 30 allows the membrane of which it is a part to deform under the various constraints that the tank is subjected to, in particular expansion or contraction constraints of the wall 8 under the effect of the temperature of the fluid which may be stored in the tank.

[0068] According to one example, the membrane bridge 30 comprises two straight corrugations 38 arranged at right angles to each other. The membrane bridge 30 can then be made in one piece, but it will be advantageous to make it from two straight portions, perpendicular to each other and joined by a node.

[0069] Furthermore, the membrane bridge 30 is secured to the first plate 32 and to the second plate 34 of the same sealing membrane 22, 26 by means of a weld. For this purpose, the membrane bridge 30 comprises on either side of the corrugation 38 a lap portion, which extends above the plane of the first plate 32 and the second plate 34. Thus, the securing of the membrane bridge 30 to the first plate 32 and the second plate 34 is ensured in a sealed manner.

[0070] It can also be seen in Figure 6 that the corrugation 38 of the membrane bridge 30 constituting the primary sealing membrane is above the corrugation 38 of the membrane bridge constituting the secondary sealing membrane.

[0071] 11 It is remarkable in Figure 6 that the primary panel 24 is held in abutment against the secondary panel 10 by means of a stud 28. To accommodate the latter, the primary panel 24 comprises at least one counterbore which allows a tightening nut to be arranged. The stud 28 comprises a collar which is welded in a sealed manner onto the secondary sealing membrane 22.

[0072] The panel 10 also comprises a countersink which receives the head of the anchoring element 14, such a countersink being covered by the sealing membrane which is pressed against the panel 10. The present invention achieves the aim it set for itself by proposing a wall of a tank whose alterations to the casing have been corrected by means of a panel held at a distance from the casing by anchoring elements and with at least one sealing membrane held in abutment against this panel. The mechanical forces to which the wall is subjected are absorbed by the filling material, once the latter has solidified. Such a material is advantageously thermally insulating.

Claims

CLAIMS 1. Wall (8) of a storage tank for at least one fluid, the wall (8) comprising a casing (2) having surface irregularities of an amplitude greater than 40 mm and at least one panel (10) held at a distance from the casing (2) by at least one anchoring element (14) which holds the panel (10) relative to the casing (2) by delimiting a zone (16) between the casing (2) and the panel (10), the zone (16) being at least partly filled by a filling material (12), the wall (8) comprising a sealing membrane (22) bearing against the panel (10), being arranged opposite the filling material (12) relative to the panel (10).

2. Wall (8) according to claim 1, comprising a waterproof layer (20) arranged between the envelope (2) and the filling material (12).

3. Wall (8) according to any one of claims 1 or 2, in which the panel (10) held at a distance from the envelope (2) is a secondary panel (10), the wall (8) comprising a primary panel (24) bearing against the sealing membrane (22).

4. Wall (8) according to claim 3, in which the sealing membrane (22) bearing against the panel (10) is a secondary sealing membrane (22), the wall (8) comprising a primary sealing membrane (26) bearing against the primary panel (24).

5. Wall (8) according to any one of claims 1 to 4, in which the filling material (12) comprises at least in part a synthetic foam.

6. Wall (8) according to claim 5, in which the synthetic foam is thermally insulating.

7. Wall (8) according to any one of claims 1 to 6, in which the filling material (12) comprises at least in part a resin loaded with particles.

8. Wall (8) according to any one of claims 1 to 7, in which the sealing membrane (22) comprises at least a first plate (32) and a second plate (34), the first plate (32) extending in a plane intersecting a plane in which the second plate (34) extends, the sealing membrane (22) comprising a membrane bridge (30) which sealably connects the first plate (32) and the second plate (34).

9. Wall (8) according to claim 8, in which the membrane bridge (30) comprises at least one corrugation (38).

10. Method for mounting a wall (8) of a storage tank for at least one fluid according to any one of claims 1 to 9, the mounting method implementing: -at least a first step during which anchoring elements (14) are secured to the casing (2), - a step prior to the first step during which the envelope (2) is analyzed to measure the surface irregularities of said envelope, the anchoring elements (14) being arranged so as to correct the surface irregularities measured during this step prior to the first step, - at least one second step during which the at least one panel (10) is made integral with the envelope (2) by means of the anchoring elements (14), - at least a third step during which the filling material (12) is arranged in the area (16) delimited between the envelope (2) and the panel (10).

11. Mounting method according to claim 10, the method being implemented when the surface irregularities of the envelope (2) are greater than 40 mm.

12. Mounting method according to any one of claims 9 to 11 in combination with claim 2, comprising a step prior to the first step during which the waterproof layer (20) is arranged against the casing (2) of the tank.

13. Mounting method according to any one of claims 9 to 12, the wall (8) comprising a plurality of panels (10), mounting method during which the first step and the second step are repeated so as to arrange the panels (10) next to each other to form a ring (36) of panels.

14. Mounting method according to any one of claims 9 to 13 in combination with claim 7, the mounting method comprising a fourth step during which the first plate (32) is made integral with a panel (10) and the second plate (34) is made integral with an adjacent panel (10), the mounting method implementing a fifth step during which the membrane bridge (30) is secured in a sealed manner with the first plate (32) and the second plate (34).

Images