JP5946579B1 - Storage tank structure and storage method - Google Patents

Abstract

[PROBLEMS] To provide a storage tank structure in which an outer tank liner can also be used as an outer formwork of a breakwater, and the outer tank liner work is not limited to a single stage and can be independently preceded by multiple stages without interfering with the breakwater construction. To provide storage tank construction methods. The present invention is a storage tank comprising an outer tub and an inner tub provided with a liquid barrier, wherein the outer tub is provided with a self-supporting outer tub side liner, The outer tub side liner is provided with a stiffener, which also serves as an inner formwork of the liquid barrier, and a plurality of the outer tub side liners are provided, and the outer tub side liners are joined to each other by backing metal butt welding. It is characterized by. [Selection] Figure 3A

Description

  The present invention relates to a gas storage tank, and mainly relates to a storage tank structure for storing liquefied natural gas (LNG) and a storage tank construction method.

  Natural gas is known as an energy source that emits less carbon dioxide than other fossil fuels, and is said to have a large reserve and is expected to provide a stable supply.

  Against this backdrop, the introduction of low-temperature storage facilities that store liquefied natural gas (hereinafter referred to as “LNG”) instead of oil and coal is also progressing.

  As this LNG storage tank, as shown in FIG. 10, a two-tank structure comprising an inner tank and an outer tank is known. The storage tank shown in FIG. 10A includes a double tank including an inner tank side plate a3, an inner tank roof a5, an inner tank bottom plate a7, an outer tank side liner a2, an outer tank roof a4, and an outer tank bottom plate a6. LNG is stored in this double tank. The inner tub and the outer tub are made of metal, and further include a liquid barrier a1 made of a concrete wall on the outside so as not to diffuse the LNG leakage at the time of disaster.

  In the structure shown in FIG. 10A, a space for providing a liquid barrier is required outside the storage space, so that the structure shown in FIG. 10B is also adopted instead of the structure shown in FIG. 10A.

  The storage tank shown in FIG. 10B comprises an inner tank side plate b3, an inner tank roof b5, an inner tank bottom plate b7, an outer tank side liner b2, an outer tank roof b4, and an outer tank bottom plate b6. It is an integrated PC breakwater b1 made of (prestressed concrete). LNG is stored in this double tank. By adopting such a structure, a conventional breakwater space can be reduced, and the LNG storage tank can be enlarged using the space.

  When LNG is stored in this type of double tank structure, the inner tank works as a low temperature storage while LNG is liquefied, and the outer tank outside thereof has a structure capable of withstanding the vaporization pressure. Further, a PC liquid breakwater is provided on the outer tank side liner for preventing leakage.

  An example in which the outer tub side liner is also used as a liquid breakwater and integrated as a concrete outer tub side liner is also found in the patent literature.

JP-A-6-34098 JP 2015-48621 A

  There is a conventionally known storage tank construction method that is constructed by integrating the breakwater and outer tank side liner found in the patent literature, but first the inner tank side plate is constructed after the outer tank side liner is constructed. To do. Therefore, until the outer tank side liner is completed, the construction period of the inner tank side plate is not entered, and the construction period takes time.

  That is, in the conventional construction method, since the construction of the PC breakwater precedes and the work area interferes with the inner tank and the bottom cooling work at the bottom, it is necessary to wait for the start-up time of the inner tank. Also, because the inner formwork for PC breakwater construction and its scaffolding project over the upper part of the inner tank side plate, it becomes an obstacle to the inner tank side plate assembly, and it is necessary to give priority to the progress of construction of the PC breaker and outer tank side liner. there were. In addition, in order to avoid potential fallen object accidents associated with up and down work, such as when suspension materials for PC breakwater construction, scaffolding or concrete placement, etc. The construction work was mutually limited. Furthermore, since the roof floats after completion of the PC breakwater and the outer tank side liner, the inner tank could not be completed alone or in parallel.

  In this regard, for example, Patent Document 2 discloses a technical idea that the outer tub side liner and the inner mold form of the liquid breakwater are combined. However, in the prior art including Patent Document 2, it is necessary to carry out the steps of outer tank side liner installation → breakwater outer wall formwork → concrete placement one step at a time. For this reason, in the prior art, there is an interaction between the outer tank construction and the reinforced concrete construction related to the breakwater for each stage, and not only cannot ensure sufficient earlyness in terms of construction period, but also in terms of safety, the upper and lower work by the cooperation The problem is that complicated work remains and the risks associated with this work cannot be resolved.

  The present invention is intended to solve such problems related to the prior art, and the construction in which the outer tank side liner also serves as the outer formwork of the liquid barrier is not limited to one stage, and the outer tank liner construction is not limited to one stage. The purpose is to provide a storage tank structure and a storage tank construction method that can be independently preceded without interfering with the breakwater construction. Specifically, the structure of the outer tank side liner is a structure that can be used independently as a formwork for the construction of the breakwater, even if it is multistage in the construction of the breakwater. The purpose is to provide a construction method. In addition, by making the outer tank side liner capable of self-supporting, the construction of the outer tank side liner, the construction of the breakwater, the construction of the inner tank side plate, the construction of the inner tank roof and the outer tank roof, etc., are independent or in parallel. When the construction of the outer tank side liner and liquid barrier, inner tank side plate, inner tank roof and outer tank roof is completed, the inner tank roof and inner tank side plate, outer tank roof and outer tank side It is an object of the present invention to provide a storage tank structure and a storage tank construction method in which liners can be attached at the top to complete the storage tank. That is, in the construction of this storage tank, the work related to the inner tank takes the most time and man-hours, so it is efficient to work in parallel with the outer tank side liner, PC liquid barrier, inner tank roof and outer tank roof. It aims at providing the construction method of the storage tank structure and storage tank which realize a construction process.

  In order to achieve such an object, the storage tank structure according to one aspect of the present invention is applied to an outer tank side liner that is installed inside a breakwater and provided with self-supporting auxiliary means, and is installed inside the outer tank side liner. And a storage tank structure including an inner tank. That is, the present invention is a storage tank comprising an outer tank and an inner tank provided with a liquid barrier, and an outer tank side liner (hereinafter also simply referred to as a “side liner”) that can stand on the outer tank. A storage tank structure characterized by comprising: Further, the outer tub side liner may be provided with a stiffener. Furthermore, it can also be set as the structure which also serves as the inner side formwork of the said breakwater. Furthermore, the outer tank side liner is formed by connecting a plurality of curved plates in the vertical direction and / or the rotating direction, and each of the plurality of curved plates is joined by backing metal butt welding. It can also be set as the structure which is.

  Here, “addition of a self-supporting auxiliary means” means any mechanism for strengthening the upright retention when the outer tub side liner of the present application is built, and is an outer plate material bent in the circumferential direction. A mode in which the rigidity of the entire side liner is increased by joining the stiffeners at constant dimensional intervals in the circumferential direction or / and the gravity direction of the convex surface and / or concave surface of the tank side liner, at least partly in the plane cross section of the outer tank side liner Embodiment in which the rigidity of the side liner is increased in shape by adopting a structure that is bent or bent in a continuous manner, an aspect in which the rigidity of the side liner is increased by setting the plate thickness of the outer tank side liner to a certain dimension or more, A mode in which the rigidity of the annular body is increased by combining the tank side liner with the continuous cotton in the circumferential direction at a relatively initial stage to increase the rigidity of the annular body, and the stiffener or auxiliary plate is joined in the circumferential direction of the outer tank side liner. In addition, the outer tank side liner is wound in a circumferential direction with continuous cotton to form an annulus, and the stiffener or auxiliary plate is also joined to form a band-like annulus, thereby providing rigidity as an annular body with ribs. A mode in which the rigidity of the side liner is increased by providing a member such as a stud diver to face the convex surface of the outer tank side liner, an outer tank side liner and an outer layer side liner laminated or connected to the outer tank side liner A mode in which the rigidity of the joint part is increased by temporarily or permanently installing a backing plate or the like in the joint part, or a combination of any two or more of these aspects may be employed. Both of these are included in the technical idea of the present application. By adding this self-supporting means to the outer tub side liner, it becomes possible to maintain a self-supporting state in multiple layers when the side liner is built. Here, “multilayer” means that a single outer tank side liner is laminated in a vertical direction over a plurality of layers (the same applies hereinafter unless otherwise specified). In addition, “self-supporting” not only does not cause collapse due to its own weight, but also can maintain an upright state without collapsing even in the case of strong winds or earthquakes, and the outer tank side liner is the formwork of the breakwater When it also serves as one of the above, it means a property having a side pressure opposing force that can withstand a side pressure when placing concrete for a breakwater. In other words, in the inner formwork for the concrete for breakwater, the self-supporting auxiliary means in the above aspect also serves as a support work, so that the support work in the prior art is unnecessary on the inner formwork side. It will bring about the effect of becoming.

  In the above embodiment, when the outer tub side liner is joined in the circumferential direction to form an annular shape, a backing metal is previously placed on one or both outer sides of the unit liner to be joined (that is, on the side of the breakwater building). It may be attached in the factory process, and the two may be joined by welding the backing metal applied at the time of joining the liner plate to the liner plate. In this case, since the liner plate-liner plate welding operation can be performed only from the non-concrete side, it is possible to avoid the up-and-down operation with the concrete construction work. This backing metal can be used for both vertical and horizontal bonding. In any case, construction is possible only from the non-concrete side. The backing money in this case can be established. The longitudinal and lateral backing plates attached in advance in this way serve as a guide function when the liner plates are connected to each other, and therefore can be defined as guide members.

  In the above case, as the backing metal, for example, a mode in which a flat plate (FB: flat bar) -like material is temporarily spot-welded to the liner material with dots may be used. The groove or the back side is prefabricated, and after carrying in the site, it can also serve as a guide when installing the adjacent liner plate at the site construction.

  According to the present invention, the construction of the outer tank side liner can be performed in advance without depending on the construction of the breakwater. In addition, according to the present invention, the outer tank side liner can be welded only from the inner surface, and the side liner work can be performed only from the inner side of the storage tank, and does not interfere with the work of the breakwater. For this reason, since it is possible to physically separate the construction from the inside and the outside with the side liner as a boundary, not only the economic effect that makes it unnecessary to prepare a working scaffold outside the side liner, but also the side There is also a safety effect that eliminates the possibility of a fall accident or the like that may occur when the construction on the liner side and the construction on the breakwater side are mixed. In this case, in particular, since the outer tub side liner is constructed so as to be able to stand on its own, it is possible to perform a multi-layered side liner construction as an effect more than simply using the outer tub side liner also as a liquid barrier mold. In addition, since it was necessary to carry out work for each layer and replacement work because it had to be performed for each single layer, it was freed from the construction time constraints in the prior art, and further shortening the construction time and ensuring safety Can do.

  Further, the present invention provides a storage tank structure in which the side liner can be used to cast and form concrete on the outside, and prestressed concrete is used as the concrete.

  According to the present invention, a self-supporting outer tub side liner can be used as a mold, and by placing concrete between the outer tub side liner and a mold provided outside, the outer tub side liner and A prestressed concrete breakwater (PC breakwater) can be integrated. In addition, since the outer tank side liner also serves as the inner formwork for concrete placement of the breakwater, the work of the breakwater can be performed only from the outer surface of the storage tank, and the inner tank is performed on the inner surface of the storage tank. Does not interfere with related work. In this case, in particular, by constructing the outer tank side liner so that it can stand on its own, it is possible to advance construction for multiple layers of the side liner, and as a result, further shortening of the work period and ensuring safety can be promoted. About a point, it is the same as that of the above. In this case, for example, an outer tank side liner is used to enable the work of holding a predetermined thickness of the mold as the work of the breakwater (for example, the separator installation work), the support work, and the like only from the outer surface of the storage tank. A separator insertion hole may be drilled at a predetermined interval on the top, and a nut that should receive the separator inserted through the hole may be fixed to either side of the outer tub side liner.

  In connection with the outer tank side liner and the separator or tie rod in the above aspect, for example, an aspect in which a nut is welded to the liner and the separator or tie rod is attached by screwing or the like, and the separator or tie rod is attached to the stiffener. Mode of welding, mode of hooking the separator or tie rod to the stiffener with metal fittings, mode of embedding or welding a nut in the stiffener, drilling a hole in the stiffener and penetrating the separator or tie rod through this hole, and the back with a nut One or more of the fastening mode and the mode in which a hole is formed in the liner and the plate is fastened (screwed, welded, etc.) through the separator or tie rod (so as to satisfy airtightness) can be employed.

  In the present application, as described above, the side liner requires a side pressure opposing force at the time of placing concrete, but only air tightness is defined as the required performance after the concrete placing is completed. This is because it is necessary to prevent the gas stored in the tank from leaking. As means for ensuring the airtightness, various existing means such as lining and airtight welding can be employed. Here, the lining means a surface treatment that covers a substance / object that can be fixed on the surface or inner surface of the object relatively thickly.

  In the present invention, the stiffener has a cross-section of a flat plate (FB: flat bar), L-shaped, T-shaped, I-shaped, or H-shaped shaft material slightly curved in the longitudinal direction. And can be provided so as to circumscribe either side of the side liner. For example, in the case of FB, the plate thickness surface can be in contact with the side liner surface, and the wide surface can be arranged vertically. In the case of the L-shape, the L-shaped vertical bar can be arranged substantially parallel to the vertical direction of the liner so that the tip of the last end of the L-shaped stroke is in contact with the liner surface. According to the above configuration, the outer tub side liner can have a certain level of rigidity to ensure the self-supporting strength, that is, the rigidity of the outer tub side liner so that it can be self-supported for multiple layers. Can be thinned. In addition, in the L-shape, it can be arranged upward (in an L-shaped state) or downward (a state in which the L-shape is inverted). In the case of an upward arrangement, it is desirable to take care so that water does not accumulate, and in the case of a downward arrangement, allowance is made so that the concrete does not easily turn around when placing concrete and so-called "soo" is not created. desirable.

  In the above aspect of the present invention, a mode (“insertion mode”) in which a reinforcing bar penetrating hole is formed in the stiffener and the reinforcing bar is inserted therethrough may be used. If the stiffener is larger than a certain size, it must be inserted. In the case of this aspect, the hole drilled in the stiffener can be used as a template for reinforcing bar arrangement work, and the stiffener can be enlarged. Alternatively, the stiffener and the reinforcing bar may be fixed by sliding the reinforcing bar on the surface of the stiffener (“sliding contact mode”). Fixing in this case can include various modes such as reinforcing bar-stiffener welding, clamping, screwing, and connection with a jig. In both the insertion mode and the sliding mode, the joining of the reinforcing bar and the stiffener can be prefabricated at the factory in advance or can be performed at the construction site. In this way, the convenience of construction is improved by treating it as a substantially integrated structure in which reinforcing bars and stiffeners are combined.

  Furthermore, in the above aspect, the stiffener-stiffener break may be joined with a temporary (or permanent) plate. That is, as described above, a backing metal running in the vertical direction is attached to the side of the joint between the liner plate and the liner plate (so that it is not necessary to perform welding work from the concrete construction side) on the concrete construction side. On the other hand, since the stiffener is also projected in the circumferential direction on the concrete side, crossing occurs at the portion where the backing metal and the stiffener are engaged. This is because the stiffener cuts and the liner plate cuts are always linked, and the stiffeners are preferably set to fit within the cuts of the liner plate. As a result, stiffener cuts are produced. In this case, the joint stiffener (hereinafter also referred to as “temporary stiffener”) is attached to the non-concrete side of the cut portion so as to cover both the stiffeners attached to the concrete construction side. By doing so, the joint part of the stiffener-stiffener is secured, and as a result, strength can be obtained, and welding of the stiffener for the joint to the liner plate as a joint work between the stiffener-stiffener is not performed. It can be constructed only from the concrete side. Therefore, the stiffener-stiffener joint work, which is important for ensuring independence, can be eliminated from the concrete work. Here, the joint stiffener may be any of L-shape, C-shape, H-shape, and FB-shape. The joint stiffener may be temporary or permanent.

  Here, in the present invention according to the above-described configuration, as an option, a rebar cradle is set for placing concrete, and the rebar cradle is assembled in a net shape by binding or welding the intersections with the rebar vertically and horizontally or the above You may make it integrally process with an outer tank side liner so that it may join to a stiffener or may penetrate these. In this case, it is possible to minimize the rebar work at the tank construction site, minimize the crossover between the rebar and formwork, and the crossover between the rebar and other occupations. Therefore, it is possible to realize a construction environment in which further safety is physically ensured.

  Moreover, in order to solve the said subject, the construction method of the storage tank which concerns on 1 aspect of this invention is the construction process of an inner tank side plate, the process of attaching a self-supporting auxiliary means to an outer tank side liner beforehand, and the said self-supporting auxiliary means Between the step of constructing the attached outer tank side liner, the step of constructing the outer mold side with the outer tank side liner as the inner mold, and the outer mold frame opposed thereto, and between the outer tank side liner and the outer mold And a step of placing concrete and constructing a breakwater. As the self-supporting auxiliary means, a configuration in which a stiffener is provided on the outer tub side liner can also be adopted. As another aspect of the present invention, in addition to these configurations, the method further comprises assembling or preparing the inner tank roof and the outer tank roof, and after the formation process of the upper part of the inner tank side plate is completed, the inner tank roof is After connecting with the upper side of an inner tank side board and completing the formation process of an outer tank side liner upper part, the structure which connects the said outer tank roof to the upper side of the said outer tank side liner can also be taken.

That is, when putting the backing of the above aspect and temporary stiffener, as a construction procedure, for example,
1 First, a backing butt butt weld is applied to the liner plate.
2 When the liner plate is brought into the site and the liner plate and the liner plate are assembled and assembled at the site, the liner plate is attached so as to be in contact with a backing metal as a guide member.
3. When the positioning of the liner plate is determined, butt welding of the longitudinal backing portion is performed at that position, and then butt welding of the circumferential backing portion is performed.
4 Attach the temporary stiffener from the non-concrete side.
5 Place concrete on the breakwater.
6 After completing the concrete placement, remove the temporary stiffener (in the case of temporary construction). As described above, the temporary stiffener may be temporary or permanent, but is preferably temporary.

  According to the present invention, the outer tub side liner is self-supporting, and by constructing a liquid breakwater using the outer tub side liner, each construction of the outer tub side liner and the inner tub side plate is performed on the liquid levee side, that is, It can be carried out in parallel and independently with the construction work outside the outer tank side liner. Furthermore, the construction of the inner tank roof and the outer tank roof can proceed independently and in parallel with the construction of the outer tank side liner and the inner tank side plate.

  Moreover, this invention includes the process of attaching a temporary support | pillar between the said inner tank roof and the said outer tank roof in the process of assembling the said inner tank roof and an outer tank roof, and the process of assembling the said inner tank roof. Provides a method for constructing a storage tank, which includes a step of attaching a temporary roof for causing the inner tank roof to rise by air pressure along the inner tank side plate, and a step of attaching a seal portion.

  According to the present invention, since the construction of the inner tank roof and the outer tank roof can be advanced in parallel with the construction of the outer tank side liner and the inner tank side plate, the outer tank side liner and the inner tank side plate are each completed. The connection with the inner tank roof and / or the outer tank roof can be made.

  Further, according to the present invention, in the construction process of the outer tub side liner, for example, a predetermined number of side liners having rigidity to maintain a multi-layered self-supporting property are added by adding a self-supporting means including a stiffener plate. A method for constructing a storage tank comprising the steps of: placing concrete between an outer formwork provided outside the side liner and forming a liquid breakwater integrally with the outer tank side liner. Is to provide.

  According to the present invention, the outer tank side liner can be made to be self-supporting over multiple layers, and then preceded by the construction of the outer formwork of the liquid breakwater facing this, only one side can be constructed. Therefore, it is possible to reduce the amount of materials required to be carried on site before placing concrete. Therefore, it is possible to change the site complex situation in the previous construction of the concrete placing work to an orderly one, and realize further improvement of safety, saving of the material storage place, and further shortening of the construction period.

  According to the present invention, as a structure of the outer tub side liner, a structure capable of independently supporting multiple layers can be used, and a breakwater can be constructed using the outer tub side liner as a formwork, and the construction of the inner tub side plate, Since the priority of each construction of the outer tank side liner construction is not questioned, the construction period of the entire construction can be greatly shortened. Moreover, the fall in the middle of construction can be prevented by making the said self-supporting possible. Furthermore, even if strong winds, earthquakes, etc. occur, collapse can be prevented and a safe construction environment can be realized.

  Moreover, this invention includes the process of attaching a temporary support | pillar between the said inner tank roof and the said outer tank roof in the process of assembling the said inner tank roof and an outer tank roof, and the process of assembling the said inner tank roof. Provides a method for constructing a storage tank comprising a step of attaching a temporary roof portion and a step of attaching a seal portion.

  According to the present invention, regardless of the progress of each step of construction of the inner tank side plate and outer tank side liner, the process of assembling the inner tank roof and the outer tank roof is advanced, and the levitation mechanism is It can be constructed without any interaction / complexity on the breakwater construction side, that is, the construction side of the breakwater side can realize a construction environment that does not depend on the construction of the inner tank side plate and the outer tank side liner, which can contribute to shortening the entire construction period. Moreover, when the inner tank side plate and the inner tank roof are completed, the roof is levitated with the outer tank roof placed on the inner tank roof, so the inner tank can be completed regardless of the progress of the construction of the breakwater. .

  Further, according to the present invention, in the construction process of the outer tub side liner, a predetermined number of rigid side liners provided with stiffeners are attached, and concrete is placed between the outer formwork provided outside the side liner. The construction method of the storage tank characterized by including the process of forming the liquid-breakwater integrated with an outer tank side liner is provided.

  Furthermore, in another aspect of the present invention, the outer tub side liner includes a plurality of curved plates connected in the vertical direction and / or the circumferential direction, and each of the plurality of curved plates is backed up. The structure joined by gold | metal | money butt welding can also be taken. In addition to the above configuration, the present invention includes an inner tank side plate construction process in which the inner tank side plate is erected, and the upper portion of the inner tank side plate in conjunction with the construction of the inner tank side plate. An inner tank roof construction process for attaching the inner tank roof to the outer tank side liner after the inner tank side plate and the outer tank side liner are assembled, and a side plate roof joining process for joining the inner tank roof and the outer tank roof to the outer tank side liner; It is also possible to adopt a configuration further including

  Generally, according to the present invention, in the construction process of the outer tub side liner, it is possible to easily place concrete on the outer side of the outer tub side liner, and the liquid barrier can be integrated with the outer tub side liner.

  Since the storage tank structure of the present invention realizes an outer tank side liner whose self-sustainability over multiple layers is strengthened by attaching a self-supporting means including attaching a stiffener as an outer tank side liner. Can be used also as the inner formwork of the breakwater, so that it is possible to provide a construction environment that enables separate and parallel work in and out of multiple layers by removing the crossing of each layer. Since this inner formwork can be integrated with the liquid barrier without removing it, the time required for installation and removal of the formwork can be reduced. In addition, according to the construction method of the present invention, the outer tub side liner can be constructed in a self-supporting manner. Thus, the outer dam side liner can be used to construct a breakwater, and after the outer tub side liner is constructed, It is possible to proceed independently at a time in a state where it is physically separated from the construction of the various work inside the tank side liner. On the other hand, inside the outer tank side liner, outside the outer tank side liner. It is possible to follow various works on the inner side, such as construction of the inner tank side plate, in parallel with the various works related to the construction of the breakwater. In addition, the construction and installation of the inner tank roof and the outer tank roof can be performed without waiting for the inner tank side plate and the upper part of the outer tank side liner to be supported, so the construction period can be further shortened than before, The overall construction period for storage tank construction can be shortened.

It is a figure explaining the basic process of construction of the storage tank concerning one embodiment of the present invention, and is a figure showing the whole figure. It is a figure explaining the basic process of construction of the storage tank concerning one embodiment of the present invention, and is a figure showing the partially enlarged view. It is a conceptual perspective view for demonstrating the outer tank side liner and the stiffener as one of the self-supporting auxiliary means attached to it among the construction of the storage tank which concerns on one Embodiment of this invention. FIG. 4 is a view showing an aspect in which a tie rod (separator) is fixed to an outer tub side liner 5 according to an embodiment of the present invention. It is a figure which showed the aspect which drills a hole directly in the outer tank side liner 5, and joins a tie rod (separator) instead of the aspect of FIG. 1D-1 regarding one Embodiment of this invention. 1D-1 and FIG. 1D-2 according to an embodiment of the present invention, a mode in which a tie rod (separator) is joined to a stiffener 6 joined to an outer tank side liner 5 is shown. FIG. It is a figure explaining the initial process of each construction of the outer tank side liner, inner tank side plate, and inner tank roof of the storage tank concerning one embodiment of the present invention, and is the figure showing the whole figure. It is a figure explaining the initial process of each construction of the outer tank side liner of the storage tank concerning one embodiment of the present invention, an inner tank side board, and an inner tank roof, and is a figure showing the partially expanded view. It is a figure explaining the progress process of each construction of the outer tank side plate of the storage tank which concerns on one Embodiment of this invention, an inner tank side plate, an inner tank roof, and an outer tank roof, and is a figure which shows the whole figure. It is a figure explaining the progress process of each construction of the outer tank side plate of the storage tank which concerns on one Embodiment of this invention, an inner tank side plate, an inner tank roof, and an outer tank roof, It is a figure which shows the one part enlarged view. It is a figure explaining the pretreatment process for the floatation of a roof simultaneously with progress of each construction of an outer tank side plate, an inner tank side plate, an inner tank roof, and an outer tank roof of a storage tank according to an embodiment of the present invention. FIG. It is a figure explaining the pre-processing process for the floatation of a roof simultaneously with progress of each construction of an outer tank side plate, an inner tank side plate, an inner tank roof, and an outer tank roof of a storage tank concerning one embodiment of the present invention. It is a figure which shows a part enlarged view. It is a figure explaining the preparatory process for the floatation of a roof simultaneously with progress of each construction of an outer tank side plate, an inner tank side plate, an inner tank roof, and an outer tank roof of a storage tank according to an embodiment of the present invention. FIG. It is a figure explaining the preparatory process for the levitation | floating of a roof simultaneously with progress of each construction of the outer tank side plate, inner tank side plate, inner tank roof, and outer tank roof of the storage tank concerning one embodiment of the present invention. It is a figure which shows an enlarged view. It is a figure explaining the construction of the outer tank side plate of the storage tank concerning one embodiment of the present invention, the floating treatment process of the inner and outer tank roofs, the mounting process of the inner tank roof and the inner tank side plate, and is a diagram showing an overall view is there. It is a figure explaining the construction of the outer tank side plate of the storage tank according to one embodiment of the present invention, the floating treatment process of the inner and outer tank roofs, the mounting process of the inner tank roof and the inner tank side plate, and a partially enlarged view thereof FIG. It is a figure explaining the attachment process of the inner / outer accessories of the storage tank which concerns on one Embodiment of this invention, the outer tank roof of an inner / outer tank roof, and the outer tank side plate (side liner), The whole figure FIG. It is a figure explaining the attachment process of the inner / external accessory of the storage tank which concerns on one Embodiment of this invention, the attachment process of the outer tank roof of an inner / outer tank roof, and an outer tank side plate (side liner), The one part expansion FIG. It is a figure explaining the process leading to completion of the storage tank concerning one embodiment of the present invention, and is also a figure explaining the whole structure. It is a figure explaining the welding of an outer tank side plate, and an attachment process regarding construction of the outer tank side plate (side liner) concerning one embodiment of the present invention, and it constructs in parallel with an inner tank side plate, an outer tank side plate, and a liquid breakwater It is explanatory drawing which shows the whole explanatory drawing which is advanced. It is a figure explaining welding of an outer tank side plate and the attachment process regarding construction of an outer tank side board (side liner) concerning one embodiment of the present invention, and explains construction of butt welding of an outer tank side board (side liner). It is explanatory drawing of. It is a figure explaining the welding of an outer tank side board, the attachment process regarding construction of the outer tank side plate (side liner) which concerns on one Embodiment of this invention, and construction of butt welding with a backing metal of an outer tank side plate (side liner) It is explanatory drawing for demonstrating. It is a figure explaining the storage tank of the two tank structure which consists of an inner tank and an outer tank as background art of this invention, and is a figure which shows the storage tank structure provided with a liquid-proof embankment independently of a storage tank. It is a figure explaining the storage tank of the two tank structure which consists of an inner tank and an outer tank as background art of this invention, and is a figure which shows the storage tank structure which integrated the outer tank side plate and the liquid-proof embankment.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. First, the construction process of the entire storage tank and the storage tank structure according to an embodiment of the present invention will be described. The construction is roughly divided into the construction of the inner tank side plate, the installation of self-supporting auxiliary means for the outer tank side liner, the construction of the outer tank side liner, the construction of the breakwater, the construction of the inner tank roof, the construction of the outer tank roof It is equipped with construction. In addition, the construction of the foundation plate, the drainage mechanism associated therewith, the construction of the floating mechanism in relation to the construction of the inner tank roof and the construction of the outer tank roof, etc. are performed as necessary. . Moreover, as a storage tank structure, there exists a basic structure which consists of an inner tank side board, an outer tank side liner, a breakwater, an inner tank roof, and an outer tank roof.

  Further, as the mechanism according to the present invention, after the inner tank roof and the outer tank roof are assembled, after the respective roofs of the inner tank side plate and the outer tank side liner are attached and fixed, there are unnecessary floating mechanisms and the like. is there. The conventional structure and construction method requires the inner mold form and the outer form form for placing concrete when constructing the breakwater, so construction of the breakwater, construction of the outer tank side liner, etc. There was a priority. In the present invention, paying attention to the outer tank side liner as a self-supporting type, there is no such restriction, and the construction of the inner tank, the assembly of the inner tank roof and the outer tank roof, the internal work, etc. can be advanced in parallel or in advance. become. Details on this point will become clear later on.

  First, a basic process of construction of a storage tank according to an embodiment of the present invention will be described with reference to FIG. In the overall view of FIG. 1A, a predetermined number of support piles 1 that will serve as the foundation of the storage tank are driven in, and a foundation plate and a bottom liner 2 that serve as a bottom plate are constructed. Around the upper circle, an inner tank annular (not shown) that serves as a base for the inner tank side plate and an anchor strap 3 to which the inner tank side plate is attached are installed. Moreover, the side liner 5 used as an outer tank side liner is installed. The outer tub side liner 5 is made of steel, for example. FIG. 1B shows a partially enlarged outer periphery of the storage tank.

  In FIG. 1B, a stiffener (hereinafter also referred to as “stiffener plate”, but the shape is not limited to the plate) 6 is attached to the outer tank side liner 5 at a key point in order to maintain strength. FIG. 1C is a conceptual perspective view for explaining a stiffener as one of the outer tank side liner and the self-supporting auxiliary means attached thereto in the construction of the storage tank according to one embodiment of the present invention. As conceptually shown in FIG. 1C, the stiffener as one of the self-supporting auxiliary means is assembled, for example, in advance (at a steelworks or the like), for example, on the outer surface side of the outer tub side liner (that is, on the side of the liquid bank). The stiffener is assembled in advance (for example, at a steel factory) so that the plane is vertically oriented and the side surface is attached and joined to the peripheral wall surface of the outer tank side liner. More specifically, the stiffener is attached in the vertical direction. This attachment can be by welding, for example.

  As shown in FIG. 1C, stud dowels 510 are further attached in the vertical and horizontal directions at regular intervals on the tank outer surface side of the outer tub side liner. For example, when a metal is used for the outer tub side liner 5, the stud gibber 510 is a metal part for strengthening the fixation between the metal surface and the concrete of the liquid breakwater (to be applied later) and fixing the metal surface to the concrete. It is. The outer tub side liner 5 is formed by bending a single plate into a peripheral wall shape. The outer tank side liner may be assembled by previously connecting two or a plurality of liners on the ground to form a block. Backing plates 520b and 520a for connecting to the adjacent outer layer side liner 5 are attached in the stacking direction and the circumferential direction of the outer tank side liner 5. The backing plates 520b and 520a are previously attached to the outer tub side liner 5 in a factory. One of the outer tank side liners 5 (the liner to which the backing plate 520b or 520a is attached) is installed at the site, and the adjacent outer layer side liner 5 is disposed using the backing plate 520b or 520a as a guide. It is preferable to join the backing plates 520b and 520a at the time of joining the outer tub side liner 5 and the outer tub side liner 5 thus obtained by, for example, spot welding (not shown). In this case, the outer tank side liner 5-the outer tank side liner 5 can be welded only from the non-concrete side (the tank inner surface in FIG. 1C). It can be avoided. As the backing plates 520b and 520a, for example, a flat plate (FB: flat bar) -like material may be temporarily spot-welded to the outer tank side liner 5 with dots.

In FIG. 1C, a temporary stiffener 530 is attached by welding or a jig in the circumferential direction to further increase the self-supporting rigidity. In the figure, the stiffener 6 is illustrated as a flat plate as an example. However, the stiffener is not limited to this shape. For example, the stiffener 6 has various shapes including an L-shaped section and a T-shaped section. Any one of them can be adopted in the technical idea of the present application. The arrangement shown in the figure as the arrangement of the backing plates 520a and 520b is merely an example, and may be upside down, and vertical and horizontal differences are possible.

  Although not shown in the drawing, preferably, the stiffener 6 is joined in the circumferential direction of the outer tub side liner 5 and then the outer tub side liner 5 is wound around the continuous direction in the circumferential direction to form an annular shape. The stiffeners 6 are joined together. Thus, a band-shaped annular body is formed by the outer tub side liner 5 and the stiffener 6, and it is possible to exhibit the rigidity as a ring-shaped annular body. Thereby, even if the outer tank side liner 5 is laminated | stacked independently in multiple layers, self-supporting property will be ensured.

  As described above, the stiffener is preferably used as the self-supporting assisting means, but in addition to or instead of the stiffener, as described above, the stud diver projects from the surface on the convex surface of the outer tank side liner as described above. Adopting an aspect to be used, adopting an aspect in which a temporary stiffener is provided as a backing in the outer tank side liner laminated or rotating joint, adoption of a thick outer tank side liner, outer tank side liner 5 itself in a flat cross section A mode that adopts a shape that is at least partially processed into a bent shape or a bent shape in the shape, the outer tub side liner 5 is wound with a single layer at an early stage and combined with continuous cotton to form an annular shape, Although the aspect etc. which ensure the rigidity from a shape surface can be considered, all are included by the technical thought of this application.

  FIG. 1D-1 is a view showing a mode in which a tie rod (separator) is further fixed to the outer tank side liner 5 in addition to the above mode. The tie rod (separator) is a jig for enabling the wall thickness (for example, 800 mm) of the liquid barrier to be maintained even during the pouring in the concrete pouring work related to the liquid barrier. As shown in the figure, the tie rod 31 is screwed into a tie nut 33 that is butt-welded to the side liner 5 (FIG. 1A), or a metal jig 40 welded to the side liner 5. A mode of being screwed into a tie nut 33 embedded or joined to (1) is adopted. In this way, the bondability between the tie rod (separator) and the side liner 5 is ensured, and as a result, the wall thickness can be maintained when placing concrete.

  FIG. 1D-2 is a view showing a mode in which a hole is directly drilled in the outer tub side liner 5 and a tie rod (separator) is joined in place of the mode of FIG. 1D-1. As shown in the figure, the tie rod 31 inserted through the lower hole 38 formed in the side liner 5 is screwed with the tie nut 35 on the side liner 5 side (FIG. 5A), or the side liner. 5 (the same figure (b)) etc. in which the tie rod 31 which penetrated the lower hole 38 drilled by 5 is screwed by the wing nut 36 by the side liner 5 side are employ | adopted. In this way, the bondability between the tie rod (separator) and the side liner 5 is ensured, and as a result, the wall thickness can be maintained when placing concrete.

  FIG. 1D-3 is a view showing an aspect in which a tie rod (separator) is joined to the stiffener 6 joined to the outer tank side liner 5 in place of the embodiment of FIGS. 1D-1 and 1D-2. As shown in the figure, a mode in which a tie rod 31 is screwed onto a tie nut 34 butt-welded to a standing surface of a stiffener 6 that is in contact with the side liner 5 (FIG. A mode in which the tie rod 31 inserted through the lower hole 39 formed in the rising surface of the stiffener 6 that is in contact with the screw is screwed with the tie nut 35 on the inner surface of the stiffener (FIG. 5B), and protrudes into the side liner 5 A mode in which the hook type tie rod 32 inserted through the lower hole 39 formed in the standing surface of the stiffener 6 that is in contact is engaged with the tie nut 35 on the inner side surface of the stiffener (FIG. 3C), the side liner 5 For example, the tie rod 31 is screwed to the tie nut 34 that is butt-welded to the rising surface of the tie fitting 37 that is clasped from the upper side with the rising surface of the stiffener 6 that is in contact with the stylus 6 (FIG. 4D). Adopted. In this way, the bondability between the tie rod (separator) and the side liner 5 is ensured, and as a result, the wall thickness can be maintained when placing concrete.

  In the above aspect, the outer tub side liner 5 is reinforced by the stiffener 6 and thus can be self-supporting over multiple layers. Thereby, collapse in the middle of construction can be prevented. Furthermore, even if strong winds, earthquakes, etc. occur, collapse can be prevented and a safe construction environment can be realized. In addition, since the outer tank side liner can be welded from only the inner surface, the side liner 5 can be attached only from the inner surface of the tank in FIG. Does not interfere. For this reason, it is possible to physically separate the inner side and the outer side from the side liner 5, and it is not necessary to prepare a working scaffold on the tank outer surface side of the side liner 5. In addition, there is no room for a drop accident or the like that can occur when the construction on the side liner 5 side and the construction on the breakwater side are mixed, so that a safe working environment is provided for workers on site. Become. In this case, in particular, since the outer tub side liner is constructed so as to be capable of self-supporting in multiple layers, the pre-construction of the side liner for multiple layers is more effective than simply using the outer tub side liner also as a liquid barrier mold. It becomes possible. In other words, since there has been no choice but to carry out replacement work for each layer because it had to be done for each single layer so far, it is freed from the work-time restrictions in the prior art, and further shortening the work time and ensuring safety are further promoted. be able to. Here, the multilayer means that the outer tub side liner 5 shown in FIG. 1C is laminated in a vertical direction over a plurality of layers. Incidentally, FIG. 1C shows a mode in which single layers (one layer) are connected in a circumferential direction (lateral direction). When the multilayer is formed, the backing plate 520b strengthens the connectivity, and the stiffener 6 is provided in an annular shape in the circumferential direction as described above to enhance the self-supporting property.

  Further, the side liner 5 reinforced by the self-supporting auxiliary means can be used as a mold frame of the liquid barrier 10. That is, the side liner 5 is used as an inner formwork, and after the construction of the reinforcing bars 7 and the like installed on the outside (tank outer surface side) of the side liner 5 including the stiffener 6 between the outer formwork (not shown), the concrete. The PC liquid breakwater and the outer tank side liner can be integrated and constructed. The stiffener 6 illustrated in FIG. 1B is attached so as to protrude upward from the side liner 5 with an L-shaped cross section. However, the shape of the stiffener 6 is not limited to this, for example, as shown in FIG. 1C. What is shown may be as described above. As a mode of a portion where the stiffener 6 is engaged with the outer tub side liner, it may be provided so as to protrude from the side liner 5 in a flat plate shape, and in combination with the PC liner made of concrete placed on the side liner 5 and the outside. Other shapes may be used as long as the desired strength can be maintained. Further, as a means for ensuring the self-sustainability, instead of the above / in combination with the above, the thickness of the outer tank side liner 5 may be set to a predetermined thickness or more. In this embodiment, an example is shown in which the stiffener 6 is provided on the outer side (tank outer surface side) of the outer tub side liner 5, but roof levitation uses air pressure between the inner tub side plate and the inner tub roof. Therefore, the stiffener 6 may be provided inside the side liner 5 (tank inner surface side).

  When the foundation construction process is finished, the construction of the inner tank side plate, the (on-site) construction of the outer tank side liner, the construction of the inner tank roof and the outer tank roof are started, but in the present invention, independent from each other, Can be constructed in parallel. The initial steps of construction of the outer tank side liner, inner tank side plate, and inner tank roof of the storage tank according to one embodiment of the present invention will be described with reference to FIGS. 2A and 2B. FIG. 2A shows an overall view, and FIG. 2B shows a partially enlarged view thereof.

  In the general view of FIG. 2A, the right side shows a cross section, and the left side shows a partial appearance of each of the outer tank side liner and the inner tank side plate. In the construction of the inner tank side plate, the inner tank side plate 8 having a predetermined size is welded and fixed in the horizontal direction and the vertical direction on the inner tank annular 21, and sequentially assembled in one layer and two layers.

  The outer tank side liner 5 is constructed by welding and fixing the side liner 5 with the stiffener 6 in the horizontal direction and the vertical direction, and sequentially assembling one layer and two layers. Since the side liner 5 as the outer tank side liner is reinforced by the stiffener 6, it can be self-supporting over multiple layers, and therefore it can maintain sufficient rigidity against strong winds, earthquakes, etc. Is prevented. In addition, the reinforced side liner 5 can be used as a mold for the liquid breakwater 10. Reinforcing bars are placed outside the side liner 5, an outside formwork (concrete formwork) (not shown) is erected on the outside, and concrete is placed between the side liner 5 and the outside formwork to prevent liquids. A bank 10 is formed.

  The details of the mechanism in which the outer tub side liner 5 can be constructed irrespective of the presence or absence of a breakwater, and the self-supporting side liner 5 can be used as an inner formwork of the breakwater 10 as a result are shown in FIGS. 9A to 9C. Explained.

  FIG. 9A shows that each construction of the inner tank side plate, the outer tank side liner, and the liquid breakwater according to one embodiment of the present invention proceeds in parallel. The inner tank side plate 8 is constructed by combining steel plates of a predetermined size in the vertical and horizontal directions, and is assembled upward with a predetermined height scaffold (bracket scaffold) 81 attached.

  The outer tub side liner 5 is also constructed by combining steel plates of a predetermined size in the vertical and horizontal directions, and is assembled upward while attaching a scaffold with a predetermined height (bracket scaffold) 51. Since the stiffeners 6 are attached to the outer surface of the side liner 5 at a predetermined interval and can stand independently, the side liner 5 can be constructed as shown in the figure prior to the liquid barrier 10 constructed on the outside. Therefore, the side liner 5 can be used as an inner mold for the construction of the breakwater 10, and the outer scaffold 11 is assembled, and the outer mold (not shown) is assembled to put concrete between the molds. Will be established.

  For example, in the vertical direction, the side liner 5 is connected by butt welding from both sides of the side liner 5 as shown in FIG. 9B at the welding joint position 52 shown in FIG. 9A.

  On the other hand, when the breakwater 10 is constructed, it is necessary to construct the scaffold 11 and the like. However, depending on the above, it can be constructed independently / in parallel with the construction of the side liner 5. Interference may occur. In the present invention, in order to solve this problem, as shown in FIG. 9C, butt welding with a backing metal is performed at the welding joint position 52 of the side liner 5 by applying the backing metal 53 and welding. In this way, the construction of the breakwater 10 and the construction of the side liner 5 can be carried out completely independently / in parallel.

  The construction of the inner tank roof and the outer tank roof can be started by constructing the inner tank roof 9 first. In order to construct the inner tank roof 9, the roof mount 94 is assembled, and the inner tank roof 9 is laid thereon. Thus, each process of the construction of the inner tank side plate, the construction of the outer tank side liner, and the construction of the inner tank roof can be performed independently.

  As shown in FIG. 2B, a bottom cool ring 41 is formed on the bottom cool ring base 4 formed on the periphery of the bottom liner 2, and an inner tank annular 21 for fixing the inner tank side plate 8 is formed thereon. Install. One layer of the inner tank side plate 8 is fixed to the anchor strap 3. Moreover, since the inner tank roof and the outer tank roof are constructed independently, the levitation equipment can be assembled in advance. Although the details will be described later, the temporary support 92 is assembled on the inner tank annular 21 independently of the roof mount 94 and the inner tank roof 9, and the floating temporary roof is installed.

  For loading other members such as the roof mount 94 and the inner tank roof 9, a crane is also used in addition to the material loading / unloading and worker entrance / exit (not shown).

  While the stacking construction of the inner tank side plate 8, the outer tank side liner 5 and the concrete placing construction are proceeded independently, the construction of the inner tank roof 9 and the outer tank roof 95 can be proceeded. FIG. 3A and FIG. 3B are diagrams for explaining the progress of each construction of the outer tank side plate, the inner tank side plate, the inner tank roof, and the outer tank roof according to an embodiment of the present invention, and FIG. FIG. 3B shows a partially enlarged view of the outer periphery of the storage tank.

  3A and 3B show that the outer tank roof 95 is assembled in parallel with the construction of the inner tank roof 9. In the present invention, as shown in FIG. 3B, as shown in FIG. 3B, for floating, the inner tank roof and the outer tank roof can be assembled without depending on the construction progress of the inner tank side plate and the outer tank side liner. In addition to attaching and fixing the temporary roof 91 and the tip of the inner tank roof 9, temporary struts 93 are provided on the skeleton of the inner tank roof 9 at the main points in constructing the outer tank roof 95. The outer tank roof 95 is assembled using this temporary support 93.

  FIGS. 4A and 4B are pre-treatments for the floating of the roof performed simultaneously with the progress of each construction of the outer tank side liner, the inner tank side plate, the inner tank roof, and the outer tank roof of the storage tank according to the embodiment of the present invention. The process is shown. 4A shows an overall view, and FIG. 4B shows a partially enlarged view of the outer periphery of the storage tank. As shown in detail in FIG. 4B, the inner tub roof 9 and the outer tub roof 95 are substantially completed, and float up regardless of the completion of the outer tub side liner including the inner tub side plate and the PC liquid barrier 10. The end of the outer tub roof 95 is fixed to the temporary support 93 at the protruding end of the inner tub roof 9 fixed to the temporary roof 91 for use. Next, the construction of the levitation mechanism is completed in parallel with the construction of the uppermost end portion of the inner tank side plate 8.

  FIG. 5A and FIG. 5B are preparation steps for the floating of the roof performed simultaneously with the progress of each construction of the outer tank side liner, the inner tank side plate, the inner tank roof, and the outer tank roof of the storage tank according to one embodiment of the present invention. 5A is an overall view, and FIG. 5B is a partially enlarged view of the outer periphery of the storage tank. FIG. 5A shows that the roof gantry 94 has been removed after the main part of the outer tub roof 95 is fixed to the inner tub roof 9 by the temporary support 93.

  In addition, as shown in detail in FIG. 5B, a knuckle plate 911 is attached to the upper part of the inner tank side plate 8 in parallel to connect to the inner tank roof, and a predetermined portion of the knuckle plate 911 and a temporary support column are attached prior to floating. Leveling wires 912 for levitation are attached at predetermined intervals via 92. In addition, a sealing material 913 is disposed at the lower stage of the floating temporary roof 91. While proceeding with these preparations, the roof mount 94 is removed, so that necessary construction can be performed on the bottom of the storage tank. A bottom cold insulation material is spread on the bottom liner 2, and an inner tank bottom plate 90 is attached thereon.

  6A and 6B illustrate the construction of the outer tank side liner of the storage tank according to the embodiment of the present invention, the floating process of the inner tank roof and the outer tank roof, and the mounting process of the inner tank roof and the inner tank side plate. FIG. 6A shows the overall configuration, and FIG. 6B shows a partially enlarged outer periphery of the storage tank.

  In FIG. 6A, a closed space is configured by the inner tank roof 9, the outer tank roof 95, the inner tank side plate 8, the floating temporary roof 91, and the sealing material 913. The inner tub roof 9 and the outer tub roof 95 are gradually lifted in stages by a blower blower (not shown). As shown in FIG. 6B, the floating temporary roof 91 moves from the initial position 91a to 91c, and the sealing material 913 also slides from the initial position 913a to 913c.

  When the inner tank side plate 8 and the outer tank roof 95 reach the top, first, the inner tank roof 9 and the tip of the knuckle plate 911 are combined. Along with this coupling, the floating temporary roof 91, the floating leveling wire 912, the sealing material 913, and the temporary support column 92 can be removed, and thus are removed.

  On the other hand, the outer tank roof 95 is fixedly connected to the upper part of the outer tank side liner after the outer tank side liner is completed.

  7A and 7B illustrate an attaching process of inner and outer accessories of the storage tank and an attaching process of the outer tank roof and the outer tank side liner 5 according to an embodiment of the present invention. FIG. FIG. 7B shows an enlarged part of the outer periphery of the storage tank. In FIG. 7A, the inner tank side plate 8 and the outer tank side liner 5 reach the uppermost part, and after the inner tank roof 9 and the knuckle plate 911 connected and fixed to the uppermost end of the inner tank side plate 8 are connected and fixed, The outer tub roof end 951 of the roof 95 is fixed to the upper portion of the side liner 5, that is, the top portion 952 of the outer tub side liner 5. As illustrated in FIG. 7B, the temporary support 93 between the inner tank side plate 8 and the outer tank roof 95 is removed along with the attachment of the outer tank roof 95.

  On the other hand, an internal pipe 900 for installation of equipment inside the storage tank and liquid feeding is constructed. FIG. 8 is a diagram for explaining the process leading to the completion of the storage tank according to one embodiment of the present invention, in which the left half is the external shape of the breakwater integrated with the outer tank side liner, and the right half is the inside. The outer appearance of the tank side plate and part of the inner tank side plate and the outer tank side liner are shown as a cross section including the liquid barrier.

  Between the inner tank side plate and the outer tank side liner, heat insulation work is performed as necessary. For example, as shown in FIG. 8, filling the cold insulation material H between the inner tank wall plate 8 and the outer tank side liner 5 may be employed.

  As exterior construction outside the storage tank, a roof staircase 901, a top landing 902, a storage tank top handrail 903, an elevating staircase 97, a pump stage 96, a pump lifting jib crane B, and the like are installed on the outer wall.

  Each embodiment described above is illustrated for understanding of the present invention, and the present invention is not limited to these embodiments, and various expansions and substitutions are allowed. Further, unless it departs from the technical idea of the present invention, those equivalent to the configurations described in the claims are also included in the scope of protection of the present invention.

  For example, in the above-described embodiment, the position of the self-supporting auxiliary means for maintaining the strength with respect to the outer tub side liner 5 is one side of the outer tub side liner 5, that is, the convex side or alternatively the concave side. However, the stiffener may be attached to both surfaces of the outer tank side liner 5.

  The present invention relates to a gas storage tank, and in the storage tank structure and storage tank construction method, each construction process of the outer tank side liner and the inner tank side plate can be performed independently, and the construction procedure can be shortened without any restrictions, It can be used to construct low-temperature storage tanks for storing liquefied natural gas (LNG), which will be increasingly introduced in the future. Accordingly, the present invention is highly applicable in various construction industries for constructing structures that need to build a high-rise and dual structure, such as the LNG storage tank industry.

DESCRIPTION OF SYMBOLS 1 ... Support pile 2 ... Bottom liner 3 ... Anchor strap 4 ... Bottom cooler ring base 5 ... Outer tank side liner 6 ... Stiffener 7 ... Reinforcement 8 ... Inner tank side plate 9 ... Inner tank roof 10 ... Concrete wall (PC liquid barrier)
21 ... Inner tank annula 31 ... Tie rod 32 ... Tie rod (hook type)
33, 34, 35 ... Tie nut 36 ... Wing nut 37 ... Tie fitting 38, 39 ... Lower hole 40 ... Metal jig 41 ... Bottom cooler ring 90 ... Inner tank bottom plate 91, 91a, 91c ... Floating temporary roof 92 ... Temporary Prop 93 ... Temporary equipment temporary support 94 ... Roof mount 95 ... Outer tank roof 100 ... Drain pipe 101 ... Drainage channel 510 ... Stud gibber 520a, 520b ... Back plate 530 ... Temporary stiffener 911 ... Knuckle plate 912, 912a, 912b, 912c ... Leveling wire for levitation 913, 913a, 913c ... Sealing material

Claims (15)

Is construction inside the dikes, self aid having a mechanism to enhance the retention of the upright when the way built be capable of holding over a self-supporting multilayer is attached the proof An outer tank side liner that also serves as an inner formwork for concrete work related to the liquid bank ;
A storage tank structure comprising: an inner tank constructed inside the outer tank side liner. The self-supporting auxiliary means is a mechanism for strengthening upright holding when the outer tub side liner is built, and is provided with a convex surface and / or a concave surface of the outer tub side liner which is a flat plate bent in the circumferential direction. The stiffeners are joined at constant dimensional intervals in the circumferential direction and / or the gravity direction , at least partially bent or bent in the plane cross section of the outer tank side liner, and the thickness of the outer tank side liner is constant. With the above dimensions, the outer tub side liner is joined to the continuous cotton in the circumferential direction at a relatively initial stage to form an annular shape, and the stiffener or auxiliary plate is joined in the circumferential direction of the outer tub side liner, The tank side liner is wound around the continuous line in the circumferential direction to form an annular shape, and the stiffener or auxiliary plate is also joined to form a band-shaped annular body, from the surface to the convex surface of the outer tank side liner At least of the provision of a backing plate or the like temporarily or permanently installed at a joint portion between the outer tub side liner and the outer layer side liner laminated or connected to the outer tub side liner. The storage tank structure according to claim 1 , further comprising any one or more . An outer tank side liner that is constructed inside the breakwater and is provided with self-supporting auxiliary means capable of maintaining a self-supporting state in multiple layers, and also serves as an inner formwork for concrete work related to the breakwater. ,
An inner tank constructed inside the outer tank side liner,
As the self-supporting auxiliary means, the outer tub side liner is formed by unitary liners joined to each other to form an annular shape,
The unit liners to be joined are joined by welding using a backing metal that is pre-attached in the longitudinal and / or transverse direction on one or both sides,
The backing metal is a guide member for joining the unit liners to each other.
A storage tank structure characterized by that . 4. The storage tank structure according to claim 3, wherein the unit liner is joined by welding using the backing metal, and is a welded joint only from the inner surface of the outer tank side liner . The outer tank side liner has holes for inserting separators or tie rods at predetermined intervals,
The separator or tie rod inserted through the outer tub side liner is screwed to a nut fixed to either side of the outer tub side liner, thereby supporting the outer tub side liner. Item 1. The storage tank structure according to Item 1 . 6. The storage tank structure according to claim 5, wherein the hole formed in the outer tank side liner is closed after the separator or tie rod is inserted and screwed to the nut . An outer tank side liner that is constructed inside the breakwater and is provided with self-supporting auxiliary means capable of maintaining a self-supporting state in multiple layers, and also serves as an inner formwork for concrete work related to the breakwater. ,
An inner tank constructed inside the outer tank side liner,
As the self-supporting auxiliary means, stiffeners are joined at constant dimensional intervals in the circumferential direction or / and the gravity direction of the convex surface and / or concave surface of the outer tub side liner,
The outer tub side liner is provided with holes for inserting a separator or tie rod at predetermined intervals, and the outer tub side liner is supported by using the separator or tie rod,
The mechanism for supporting the outer tank side liner is:
A structure in which the separator or tie rod is welded to the stiffener, a structure in which the separator or tie rod is hooked to the stiffener with a metal fitting or the like, a nut is embedded or welded to the stiffener, and the separator or tie rod is screwed to the nut Structure, structure in which a hole is drilled in the stiffener and the separator or tie rod is passed through the hole and then screwed with a nut,
A storage tank structure comprising at least one of the above . The joint part between the stiffener and the reinforcing bar related to the liquid barrier is
A structure in which a hole for penetrating the reinforcing bar is drilled in the stiffener and the reinforcing bar is inserted through the hole;
A structure in which the reinforcing bar is slidably contacted with the surface of the stiffener so that the stiffener and the reinforcing bar are fixed by at least one of welding, clamping, screwing, and jig connection.
8. The storage tank structure according to claim 7, comprising: The stiffener is one of the outer tank side liners in which a shaft having a cross section of a flat plate (FB) shape, an L shape, a T shape, an I shape, or an H shape is slightly curved in the longitudinal direction. The storage tank structure according to claim 7, wherein the storage tank structure is provided so as to be in contact with the side of the tank . 8. The storage tank structure according to claim 7, wherein a joint stiffener is attached to the stiffener at a joint portion between the stiffener cut and the backing metal . 2. The storage tank structure according to claim 1, wherein the outer tank side liner is provided with means for ensuring airtightness . It further comprises a reinforcing bar support for receiving the reinforcing bar related to the liquid barrier, and the reinforcing bar is assembled in a net shape by joining or welding the intersections vertically and horizontally to the reinforcing bar support or through these. The storage tank structure according to claim 1, wherein the storage tank structure is integrally processed with the outer tank side liner . It further includes a reinforcing bar support for receiving the reinforcing bar related to the liquid barrier, and the reinforcing bar is joined to the stiffener or penetrated through a net-like structure in which crossing points are bonded or welded vertically or horizontally. The storage tank structure according to claim 7, wherein the storage tank structure is integrally processed with the outer tank side liner . The storage tank structure according to claim 1, wherein stud gibels are vertically and horizontally attached to the outer tank side liner at predetermined intervals . An inner tank process for building the inner tank;
An outer tub construction process by an outer tub side liner provided with self-supporting auxiliary means for enabling independence over multiple layers ;
The construction process of building the outer mold facing the inner mold as the outer tank side liner as the inner mold,
Placing concrete between the outer tub side liner and the outer mold; and
A storage tank construction method comprising :
The construction process of the outer tub is
A first step of applying a backing metal butt weld to the liner plate according to the outer tank side liner;
A second step of bringing the liner plate into the construction site and attaching the first liner plate and the second liner plate to the backing metal as a guide member when the first liner plate and the second liner plate are assembled and assembled at the construction site. When,
When the positioning of the liner plate is confirmed, in that position, the butt welding of the longitudinal backing portion is performed, and then the circumferential backing portion butt welding is performed,
A fourth step of attaching the temporary stiffener from the non-concrete side;
A fifth step of placing the concrete of the liquid breakwater;
And a sixth step of removing the temporary stiffener after completion of placing the concrete .

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