KR101792700B1

KR101792700B1 - Method for constructing barrier

Info

Publication number: KR101792700B1
Application number: KR1020150047431A
Authority: KR
Inventors: 박소영; 양진혁
Original assignee: 삼성중공업(주)
Priority date: 2015-04-03
Filing date: 2015-04-03
Publication date: 2017-11-03
Also published as: KR20160119363A

Abstract

The present invention relates to a barrier construction method for constructing a barrier of a liquefied gas storage tank. According to an aspect of the present invention, there is provided a barrier construction method comprising the steps of: forming a coupling body by joining spacers to respective inner barrier wall units, forming an outer barrier unit by providing an outer barrier unit in a storage tank And an assembling step of assembling each of the assemblies on an outer barrier provided inside the storage tank.

Description

{METHOD FOR CONSTRUCTING BARRIER}

The present invention relates to a method for constructing a barrier of a liquefied gas storage tank. And more particularly to a method for constructing a barrier of a liquefied gas storage tank in which spacers are provided between an inner barrier and an outer barrier.

Liquefied natural gas (LNG) is a colorless transparent liquid that reduces the volume to 1/600 by cooling methane-based natural gas to -163 ° C. LNG storage tanks that store LNG are made of structures and materials that can withstand liquefaction of natural gas at very low temperatures. In the liquefied natural gas storage tank, the barriers receive mechanical load, LNG gas pressure and liquid load, and come in contact with -163 ° C ultra-low temperature liquid. Therefore, they must withstand the temperature load safely and have special structure to prevent LNG leakage. Is designed. Therefore, generally, the barrier of the liquefied natural gas storage tank has an inner side wall provided with a metal material, an outer side wall, and a structure provided between the inner side wall and the outer side wall and spacers having an adiabatic property are coupled to each other. In this case, generally, the outer barrier is applied, the spacer is bonded to the upper surface of the outer barrier, and then the inner barrier is bonded to the upper portion of the spacer. That is, each of the processes is sequentially performed in the same space by a plurality of processes for joining the entire barrier including the inner barrier, the outer barrier and the spacer to the liquefied natural gas storage tank. Therefore, when the outer barriers are not installed in the storage tank, the inner barriers are not installed. Therefore, the inner barriers must be installed after the outer barriers are installed in the tanks. do.

The present invention is to provide a method by which an inner barrier unit and a spacer are combined to form an assembly, and a step of bonding the assembly to an outer barrier is performed independently of each other.

The present invention also provides a method for shortening the time for constructing the barrier of the storage tank.

The problems to be solved by the present invention are not limited thereto, and other matters not mentioned can be clearly understood by those skilled in the art from the following description.

The present invention provides a barrier construction method. According to one embodiment, the barrier construction method includes an inner barrier formed by a plurality of inner barriers facing each other to be in contact with each other, an outer barrier formed by a plurality of outer barrier units facing each other to be in contact with each other, and a plurality of spacers, Wherein the inner barriers and the outer barriers are provided facing each other and spaced apart from each other, the spacers being provided between the inner barriers and the outer barriers, and each of the inner barriers Forming a bonding body by bonding each of the spacers to the unit body to form a bonding body; An outer barrier installing step of installing the outer barrier unit in the storage tank to form an outer barrier; And an assembling step of assembling each of the assemblies on the outer barrier provided inside the storage tank.

The coupling formation step is performed independently from the coupling step.

Wherein the outer barrier mounting step comprises: installing an insulating wall inside the storage tank for insulating the storage tank; And an outer barrier bonding step of bonding the outer barrier unit onto the heat insulating wall.

Wherein the first and second fixing members are protruded from the lower surface of the inner barrier unit, and the first and second fixing members are protruded from the lower surface of the inner barrier unit, respectively, by using a fixing member including a first fixing member and a second fixing member, And the second fixing member penetrates the upper and lower portions of the spacer to be engaged with the first fixing member to couple the spacer to the inner barrier unit.

And the second fixing member is provided to include a support portion extending outward from the lower end.

According to an embodiment of the present invention, the barrier construction method of the present invention can be performed independently of the steps of forming the joined body by combining the inner barrier unit and the spacer, and bonding the joined body to the outer barrier.

In addition, according to the embodiment of the present invention, the barrier construction method of the present invention can shorten the construction time of the barrier wall of the storage tank.

1 is a sectional view exemplarily showing a vessel equipped with a liquefied gas storage tank.
2 is an enlarged view showing a portion 'A' of FIG.
3 is a plan view showing in detail a part of the liquefied gas storage tank.
4 and 5 are sectional views taken along the line I-I 'and the line II-II' in FIG.
6 is a perspective view showing a barrier of the liquefied gas storage tank;
7 is an exploded perspective view showing a spacer interposed between an inner wall and an outer wall forming the wall of the liquefied gas storage tank.
8 is a perspective view showing a fixing member for coupling the inner barrier wall unit and the spacer.
9 is a perspective view showing a state in which the inner barrier wall unit and the space are coupled by the fixing member in Fig.

Other advantages and features of the present invention and methods for accomplishing the same will be apparent from the following detailed description of embodiments thereof taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and the present invention is only defined by the scope of the claims. Although not defined, all terms (including technical or scientific terms) used herein have the same meaning as commonly accepted by the generic art in the prior art to which this invention belongs. A general description of known configurations may be omitted so as not to obscure the gist of the present invention. In the drawings of the present invention, the same reference numerals are used as many as possible for the same or corresponding configurations. To facilitate understanding of the present invention, some configurations in the figures may be shown somewhat exaggerated or reduced.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises", "having", or "having" are intended to specify the presence of stated features, integers, steps, operations, components, Steps, operations, elements, parts, or combinations thereof, whether or not explicitly described or implied by the accompanying claims.

An embodiment of the present invention provides a barrier construction method for constructing a barrier of a liquefied gas storage tank such as liquefied natural gas (LNG). First, an example of a liquefied gas storage tank provided with a barrier capable of being constructed using the barrier construction method of the present invention will be described. However, the barrier construction method of the present invention is not limited to this, and it is applicable to install the barriers of all types of liquefied gas storage tanks provided with a barrier formed by providing a spacer between two barriers.

FIG. 1 is a sectional view exemplarily showing a vessel 1 equipped with a liquefied gas storage tank 10, and FIG. 2 is an enlarged view showing a portion 'A' of FIG. The liquefied gas storage tank 10 may be installed in the vessel 1, as shown in Fig. The ship 1 may be composed of a hull having a double structure of an outer wall 16 forming an outer shape and an inner wall 12 formed therein.

The inner wall 12 and the outer wall 16 of the ship 1 may be integrally connected to each other by a connecting rib 13 and may be formed of a single structure hull having no inner wall 12 have. On the other hand, only the upper part of the ship 1 may be formed as a single deck, and its external shape may be modified into various forms depending on the size of the ship 1, the storage capacity, and the like.

The inside of the inner wall 12 can be divided by the partition 14. A coffer dam may be formed on the barrier rib 14. The storage tank 10 may be provided in the inner space of the vessel for loading cryogenic liquefied gas. The barrier 150 is a liquid-tight gas stored in the storage tank 10, and may be in contact with the cryogenic liquefied gas, and a corrugation part may be formed to correspond to a temperature change depending on the load of the liquefied gas.

The barriers 150 are connected to the inner wall 12 or the bulkhead 14 of the vessel 1 by a plurality of anchor structures 130 positioned at first anchor points and second anchor points. Between the barrier 150 and the inner wall 12 constituting the storage tank 10, the heat insulating wall structures 120, 130 and 140, which are modules constituting a layer of the heat insulating wall, are located.

The heat insulating wall structures 120, 130 and 140 form an insulating wall which is located between the inner wall 12 or the partition wall 14 and the barrier 150 to insulate the storage tank 10. Each of the heat insulation wall structures 120, 130 and 140 includes a corner structure 120 disposed at a corner of the module structure, an anchor structure 130 disposed at a predetermined interval on the inner wall 12, Or an anchor structure (130). The barrier 150 is mainly supported by the anchor structure 130. The planar structure 140 supports the load of the liquefied gas that the barrier receives.

2, the heat insulating wall structures 130 and 140 installed on the inner wall 12 of the storage tank 10 are divided into a planar structure 140 installed on a plane portion and a planar structure 140 installed between the planar structures 140 And an anchor structure 130 installed in the anchor structure 130. The anchor structure 130 is installed on the inner wall 12 or the partition wall 14 of the storage tank 10 and is fixed by an anchor support rod 136 passing through the anchor structure 130.

The planar structure 140 is inserted between the anchor structure 130 or the corner structure 120 and is installed in the inner wall 12 of the tank 10 by a plurality of connecting means (not shown). A barrier 150 directly contacting the liquefied gas is installed on the upper portion of the heat insulating wall structures 130 and 140.

The barrier 150 consists of a double structure, i.e., an inner barrier 151 directly in contact with the LNG, and an outer barrier 155 below it. Thus, the inner barrier 151 is provided inside the storage tank 10 rather than the outer barrier 155. The inner barriers 151 and the outer barriers 155 are spaced apart from each other by a predetermined height. The barriers 150 may be secured to the ends of the anchor support rods 136 of the anchor structure 130 by welding. The inner barrier 151 and the outer barrier 155 may be made of a metal material.

The barrier 150 is formed with a plurality of corrugations P (convex portions in FIG. 2) to prevent damage during shrinkage and stretching. The corrugated portion P is prevented from being damaged due to thermal deformation applied to the barrier 150 due to expansion or contraction of the corrugated pipe due to the temperature change depending on the load of the liquefied gas. In FIG. 2, the barrier 150 is illustrated as having a dual structure of an inner barrier 151 and an outer barrier 155, but it is also possible to stack three or more layers.

FIG. 3 is a plan view showing in detail a part of the liquefied gas storage tank 10, and FIGS. 4 and 5 are sectional views taken along the line I-I 'and the line II-II' of FIG. 2 to 5, the heat insulating wall structures 120, 130, and 140 are formed by fixing the corner structure 120 and the anchor structure 130 on the bottom surface and the corner structure 120 or the anchor structure 130, The planar structure 140 is provided so as to be slightly movable.

The planar structure 140 is installed by a plurality of connecting means 146 between the corner structure 120 or the anchor structure 130. The connecting means 146 is used for fastening a plastic plate (flat bottom plate) 141, which is a lower plate of the planar structure 140, to the stud bolt welded to the inner wall 12 of the hull by a nut.

The planar structure 140 may be formed with a gap (approximately 1 to 4 mm) spaced from the side surface of the corner structure 120 or the anchor structure 130 by a predetermined distance, So that the deformation amount can be absorbed. Accordingly, the planar structure 140 can be slightly moved (slid) in the horizontal direction with respect to the bottom surface.

The planar structure 140 is composed of a flat bottom plate 141 that is in contact with the inner wall 12, a planar heat insulator 142 formed on the flat bottom plate 141, and a flat top plate 143 formed thereon. The flat bottom plate 141 and the flat top plate 143 may be made of a plywood material and the flat heat insulator 142 may be formed of a polyurethane foam.

The anchor structure 130 includes an anchor bottom plate 131, an anchor insulator 132 formed of polyurethane foam on the anchor bottom plate 131 and an anchor top plate 133 coupled to the anchor bottom plate 131. The anchor bottom plate 131 is mechanically fixed to the inner wall 12. To this end, a plurality of stud pins 138 are installed at predetermined intervals in the inner wall 12, and an anchor base plate 137 ). The anchor bottom plate 131 is mechanically secured to the inner wall 12 by a nut 139 that is coupled to the stud pin 138.

An anchor bottom plate 131 is provided on the anchor base plate 137. A predetermined digging space is formed at the center of the anchor bottom plate 131, and a rod supporting cap 134 is installed in the digging space. The rod supporting cap 134 is formed with the nut 134a or the nut structure integrally formed therein so that the above described anchor supporting rod 136 is vertically coupled to the rod supporting cap 134 .

The rod support cap 134 is composed of a cap portion having a structure for coupling the nut 134a therein and a flange portion extending radially from the lower end of the cap portion. The flange portion is more firmly coupled as it is interposed and coupled between the stud pin 138 and the nut 139 that fixes it.

An anchor insulating member 132 formed of a polyurethane foam is inserted into and positioned in the anchor support rod 136 at an upper portion of the anchor bottom plate 131. The anchor upper plate 133 is fixed to the upper surface of the anchor insulating member 132 through which the anchor supporting rod 136 passes. An upper cap 135, which is coupled to the end of the anchor support rod 136, is located at the center of the anchor upper plate 133.

A barrier 150, which is in contact with the liquefied gas, is installed on the upper portion of the heat insulating wall structures 130 and 140. The barrier 150 is fixed to one side of the upper cap 135 by welding. In addition, the barrier rib 150 is formed with a plurality of corrugated portions P in order to prevent shrinkage or damage upon expansion due to fluctuation or temperature change of the heat insulating wall structure.

The barrier 150 may be of a multi-layer structure comprising a plurality of sealing walls, and preferably consists of a dual structure of an inner barrier 151 and an outer barrier 155. That is, the barrier 150 is composed of an outer barrier 155 raised on the heat insulating wall including the heat insulating wall structures 130 and 140 and an inner barrier 151 provided on the upper portion of the outer barrier 155, The inner barrier 151 and the outer barrier 155 are welded and fixed to the upper cap 135.

For this, a step corresponding to the height of the barrier 150 may be formed on the upper cap 135, and the inner barrier 151 and the outer barrier 155 are fixed by welding to the stepped portion. That is, the outer barrier 155 is fixed to the lower end of the step by welding, and the inner barrier 151 is fixed to the upper end of the step by welding.

As described above, since the interval between the inner barrier 151 and the outer barrier 155 is kept constant by the step portion, the mechanical stress due to the interference between the inner barrier 151 and the outer barrier 155 does not occur. As described above, the heat insulating wall structures 120, 130, and 140 are formed as a heat insulating wall by the combination of the corner structure 120, the anchor structure 130, and the planar structure 140. The anchor structure 130 may be fixed by mechanical coupling with the inner surface 12 of the hull 1 or the anchor support rods 136 may be directly welded to the inner surface 12 of the hull 1 have.

In this case, since the inner wall 151 and the outer wall 155 may be damaged by the contact, it is preferable that the wall 150 does not contact each other. To this end, a spacer 160 is provided to maintain a constant distance between the inner barrier 151 and the outer barrier 155. The spacers 160 may be formed of plywood and may be provided in all areas other than the corrugations of the barrier 150.

On the other hand, reference numeral 170 denotes a level material which is applied between the inner wall 12 of the ship 1 and the bottom surface of the heat insulating wall structure with paper interposed therebetween, Keep the structure at a constant height. Meanwhile, the barrier 150 may be corrugated, a stainless steel used for the GTT Mark-III type or an invar steel used for the GTT No.96.

The liquefied gas storage tank having the above-mentioned heat insulating structure is formed in a structure having a multiple structure with the heat insulating wall, particularly a structure having a double wall close to the heat insulating wall, so that the complexity of the structure for installing the outside wall between the two heat insulating walls can be eliminated It is possible to solve the problem of leakage occurring between the outer side walls or between the outer side walls of the anchors. Further, it is possible to simplify the installation structure of the storage tank installed inside the vessel for transporting the liquefied gas, which is a liquid at a very low temperature, and to shorten the assembling process because the structure is simple, the operation is easy, .

FIG. 6 is a perspective view showing the barrier of the liquefied gas storage tank. FIG. 7 is a perspective view showing a spacer 160 interposed between the inner barrier 151 forming the barrier of the liquefied gas storage tank and the outer barrier (152 of FIG. 2) FIG.

Referring to FIGS. 6 and 7, the barrier of the liquefied gas storage tank has a membrane structure. The barrier wall of the liquefied gas storage tank has a longitudinal wrinkle portion 20 arranged in the vertical direction and a transverse wrinkle portion 30 arranged in the lateral direction with the same shape as the longitudinal wrinkle portion 20 in a staggered structure .

The longitudinal wrinkles 20 are composed of first and second upper and lower wrinkles 21, second upper and lower wrinkles 22, third upper and lower wrinkles 23 and fourth upper and lower wrinkles 24, respectively. The first and second upper and lower wrinkles 21 and 22 and the third and fourth upper and lower wrinkles 23 and 24 are elongated in a straight line of the same size and shape, 1 direction).

The first upper and lower wrinkles 21 and the second upper and lower wrinkles 22 are arranged to be parallel to each other on the left and right sides with respect to the center of the longitudinal wrinkles 20. [ The first upper and lower wrinkles 21 and the second upper and lower wrinkles 22 are separated by a distance corresponding to the widths of the third upper and lower wrinkles 23 and the fourth upper and lower wrinkles 24, respectively.

The third upper and lower wrinkles 23 and the fourth upper and lower wrinkles 24 are formed between the first upper and lower wrinkles 21 and the second upper and lower wrinkles 22, Are arranged on the same upper and lower axes at regular intervals on the upper and lower sides with reference to the first fixed point. A first fixing point 25 is formed between the third upper and lower corrugated parts 23 and the fourth upper and lower corrugated parts 24, that is, the center of the longitudinal corrugated part 20, without a corrugated part.

A first fixing point 25 formed between the first upper and lower wrinkles 21 and the second upper and lower wrinkles 22 and between the third upper and lower wrinkles 23 and the fourth upper and lower wrinkles 24 Anchor holes are formed at the center.

The transverse wrinkle portion 30 has the same shape as that of the longitudinal wrinkle portion 20 and has a center left side of the first upper and lower wrinkled portions 21, a center right side of the second upper and lower wrinkled portions 22, 23 and the lower side of the fourth upper and lower corrugated portions 24, respectively.

The transverse wrinkle portion 30 is composed of first right and left wrinkles 31, second right and left wrinkles 32, third right and left wrinkles 33 and fourth right and left wrinkles 34. The first left and right wrinkles 31, the second left and right wrinkles 32, the third right and left wrinkles 33 and the fourth right and left wrinkles 34 are formed long by straight lines of the same size and shape, And a second direction perpendicular to the first direction in which the direction wrinkle portions are arranged).

The first right and left corrugated portions 31 and the second right and left corrugated portions 32 are arranged so as to be parallel to each other on the upper and lower sides with respect to the center of the transverse wrinkle portion 30. The first right and left corrugated portions 31 and the second right and left corrugated portions 32 are spaced apart from each other by a distance corresponding to the widths of the third right and left corrugated portions 33 and the fourth right and left corrugated portions 34.

The third right and left corrugated portions 33 and the fourth right and left corrugated portions 34 are formed between the first right and left corrugated portions 31 and the second right and left corrugated portions 32 and are formed at the center The first and second fixing points) on the left and right sides at regular intervals. A second fixing point 35 is formed at the center of the transverse wrinkle portion 30 between the third left and right wrinkles 33 and the fourth right and left wrinkles 34,

A second fixing point 35 formed between the first right and left corrugated portions 31 and the second right and left corrugated portions 32 and between the third left and right corrugated portions 33 and the fourth left and right corrugated portions 34 Anchor holes are formed at the center.

One closed space is formed by the two transverse wrinkles 30 and the two longitudinal wrinkles 20. The corrugations 21 to 24 and 31 to 34 may be formed to have a length D of a substantially closed space. The corrugations 21 to 24 and 31 to 34 may be provided in a semicircular or oval shape. As described above, the barrier of the liquefied gas storage tank has the 'T' shape of the transverse wrinkle portion 30 and the longitudinal wrinkle portion 20. The longitudinal wrinkles 20 have a membrane structure composed of three fold wrinkles 21, 22, 23, or 24. The transverse wrinkle 30 has a membrane structure composed of three fold pleats 31, 32, 33 or 34.

By such a structure, it is possible to prevent the stress concentration phenomenon occurring at the ends of the longitudinal and transverse wrinkles 20, 30 and to form an anchor hole in the short-circuited portion between the wrinkles, The stress can be prevented from being concentrated. That is, even if the load condition from the outside is changed, the anchor is always protected by the surrounding wrinkles against the external deformed load, so that the thermal deformation is minimized in the anchor hole surrounded by the wrinkle, The anchor can be stably installed.

Hereinafter, a barrier construction method according to an embodiment of the present invention will be described in detail using a barrier 150 provided in the storage tank 10 with reference to FIGS. 1 to 7. FIG.

The barrier construction method according to an embodiment of the present invention includes a coupling formation step S10, an outer barrier installation step S20, and a coupling assembly step S30.

The barrier 150 of the liquefied gas storage tank 10 includes an inner barrier 151, an outer barrier 155 and a spacer 160. The inner barrier 151 is formed by coupling a plurality of inner barrier unit bodies 151a so that their side surfaces are in contact with each other. That is, the inner barrier unit 151a is a unitary member forming the inner barrier 151. The outer barrier 155 is formed by combining a plurality of outer barrier unit bodies 155a such that their side surfaces are in contact with each other. That is, the outer barrier unit 155a is a unit forming the outer barrier 155. A plurality of spacers 160 are provided.

In the coupling forming step S10, the spacers 160 are coupled to the respective inner barrier unit bodies 151a to form the coupling unit 200. [ 8 is a perspective view showing a fixing member 300 for coupling the inner barrier wall unit and the spacer. 9 is a perspective view showing a state in which the inner barrier wall unit and the space are coupled by the fixing member. Referring to FIGS. 8 and 9, according to one embodiment, in the coupling forming step S10, the inner barrier unit 151a and the spacer 160 are coupled using the fixing member 300. FIG. The fixing member 300 includes a first fixing member 310 and a second fixing member 320. The first fixing member 310 and the second fixing member 320 are provided to be engaged with each other.

For example, the first fixing member 310 is provided so as to protrude from the lower surface of the inner barrier unit 151a. The first fixing member 310 may be provided in a cylindrical shape in which the upper portion is fixed to the lower surface of the inner barrier unit 151a and the lower portion is opened. The side wall of the first fixing member 310 may have a coupling hole 311 through which the coupling projection 321 of the second fixing member 320 is inserted when the second fixing member 320 is coupled with the side wall. A plurality of coupling holes 311 may be provided.

The second fixing member 320 penetrates the upper and lower portions of the spacer 160 and is coupled to the first fixing member 310 to thereby couple the inner barrier unit 151a and the spacer 160 together. The second fixing member 320 may be provided in a cylindrical shape whose upper and lower portions in the longitudinal direction are open. The side wall of the second fixing member 320 may be provided with a coupling protrusion 321 that is inserted into the coupling hole 311 of the first fixing member 310 when the first fixing member 310 is coupled with the side wall. The engaging protrusions 321 may be provided in plurality. The engaging protrusions 321 are provided in a number equal to or less than the engaging holes 311. [

The second fixing member 320 may include a support portion 320a extending outward from the lower end. The supporting portion 320a supports the lower surface of the spacer 160 when the inner barrier unit 151a and the spacer 160 are coupled. The support portion 320a may be provided in a ring shape when viewed from below.

Referring again to FIGS. 1 to 7, in the outer barrier mounting step S20, the outer barrier unit 155a is installed inside the storage tank 10 to form an outer barrier. The outer barrier installation step S20 includes an adiabatic wall installation step S21 and an outer barrier bonding step S22.

In the heat insulating wall installing step S21, the heat insulating wall is installed inside the storage tank 10. The insulating wall insulates the storage tank (10). Therefore, the heat insulating wall is provided with a material having an insulating property, and is provided as a structure for enhancing the heat insulating effect. For example, the heat insulating wall may be provided in the same manner as the heat insulating wall of the barrier 150 shown in Figs. 1 to 7.

In the outer barrier joining step S22, the outer barrier unit 155a is bonded onto the heat insulating wall. The plurality of outer barrier unit bodies 155a are coupled to each other on the heat insulating wall side by side to form an outer barrier 155.

In the coupling step S30, each of the assemblies 200 is coupled to the outer barrier 155 provided inside the storage tank 10.

As described above, in the barrier construction method of the present invention, the inner barrier unit 151a and the spacer 160 are coupled to each other independently of the coupling of the spacer 160 to the outer barrier 155 and the coupling forming step S10. That is, the coupling formation step S10 is performed independently from the coupling coupling step S30. Thus, the assembled body 200 can be produced in advance before being joined onto the outer barrier 155 provided in the storage tank 10. Or a plurality of assemblies 200 different from the assemblies 200 that are coupled or coupled to the outer barriers 155 while the assemblies 200 are coupled on the outer barriers 155 installed in the storage tank 10, . In this case, it is not necessary to install the inner barrier 151 on the coupled spacer 160 after the spacer 160 is coupled onto the outer barrier 155 during the barrier construction, and the outer barrier 155 It is possible to directly join the coupling unit 200 in which the outer barrier unit 155a and the spacer 160 are already coupled to the outer wall unit 155a and the spacer 160. Therefore, according to the embodiment of the present invention, Time can be shortened.

It is to be understood that the above-described embodiments are provided to facilitate understanding of the present invention, and do not limit the scope of the present invention, and it is to be understood that various modifications are possible within the scope of the present invention. It is to be understood that the technical scope of the present invention should be determined by the technical idea of the claims and the technical scope of protection of the present invention is not limited to the literary description of the claims, To the invention of the invention.

10: Storage tank 150: Barrier
151: inner barrier 151a: inner barrier unit
155: outer barrier 155a: outer barrier unit
160: spacer 200:
300: Fixing member

Claims

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An inner wall formed by a plurality of inner barrier wall unit bodies joined to each other so as to be in side contact with each other, an outer barrier wall formed by a plurality of outer barrier wall unit bodies joined to each other to be in side contact with each other, and a plurality of spacers, In the construction method,
Wherein the inner barrier and the outer barrier are provided facing each other and facing each other,
Wherein the spacer is provided between the inner barrier and the outer barrier,
Forming a coupling body by coupling each of the spacers to each of the inner barrier wall units;
An outer barrier installing step of installing the outer barrier unit in the storage tank to form an outer barrier; And
And an assembling step of assembling each of the assemblies on the outer barrier provided inside the storage tank,
The coupling formation step is performed independently from the coupling step,
The inner barrel unit and the spacer are combined using a fixing member including a first fixing member and a second fixing member which mesh with each other,
Wherein the first fixing member is provided so as to protrude from the lower surface of the inner barrier unit,
And the second fixing member penetrates the upper and lower portions of the spacer to be coupled with the first fixing member to thereby join the spacer to the inner barrier unit.

3. The method of claim 2,
Wherein the step of installing the outer barrier comprises:
A step of installing a heat insulating wall for inserting the storage tank into the storage tank; And
And an outer barrier joining step of joining the outer barrier unit onto the heat insulating wall.

delete

3. The method of claim 2,
Wherein the second securing member is provided to include a support extending outwardly from a lower end thereof.