JP4802001B2 - Side wall and foundation bottom plate connection structure - Google Patents

Description

The present invention relates to a connection structure of LNG (liquefied natural gas) constituting a reservoir tank, such as the side walls and the base bottom plate and a joint guar linker sidewalls and the base bottom plate formed by, in particular, production and improvement in workability those related to the connection structure of things can luer sidewalls and the base bottom plate formed by anchor to achieve cost reduction of the cost.

  Among the low temperature storage tanks for liquid storage tanks that require a low temperature storage tank such as LNG (liquefied natural gas), the inner tank side plate provided on the inner side of the cold insulation side wall has an upward force due to the gas pressure in the inner tank. A structure in which the inner tank side plate and the base bottom plate are connected by an anchor that can resist the tensile force caused by the overturning moment generated by the upward force is employed. In addition to the upward force described above, the inner tank side plate has a tensile force due to a tipping moment caused by wind and earthquake, and the anchor that connects the inner tank side plate and the foundation bottom plate against the tensile force is also provided. Resist.

  For example, when designing an LNG storage tank, the design is generally performed in accordance with the “LNG ground-type storage tank guideline” (Non-patent Document 1) by the Japan Gas Association. This guideline also describes that an inner tank anchor is provided in consideration of the upward moment generated in the tank and the overturning moment due to the seismic force.

  In order to firmly fix one end of the conventional inner tank anchor in the low-temperature storage tank described above to the foundation bottom plate, it is generally configured to be deeply embedded in the foundation bottom plate. However, since the inner tank anchor has a long insertion length, it interferes with the bar arrangement of the foundation, and therefore, the installation of the inner tank anchor becomes extremely difficult. In this case, for example, by partially cutting the reinforcement of the foundation bottom slab, or by reinforcing the reinforcing bar whose end is bent, and so on, the reinforcement reinforcement is further arranged after the inner tank anchor is installed. I cannot deny the decline. Furthermore, due to the placement of reinforcing bars, etc., the bar arrangement becomes denser, and there is also a concern that quality defects such as whether concrete will be sufficiently filled in the bar arrangement when placing the foundation bottom slab concrete. there were.

  In addition, as shown in FIG. 9, the conventional side wall and base bottom plate connecting structure has a side wall (consisting of a cold insulation side wall d, an inner tank side plate e inside thereof, and an outer tank side plate f outside thereof). The side plate e and the foundation bottom slab b are connected by an anchor a. The anchor a includes an anchor member a1, a cylindrical anchor sleeve a2 through which the anchor member a1 passes, and a base plate a3 for shear reinforcement fixed to the bottom surface of the anchor sleeve a2, and further, the bottom surface of the base plate a3. Further, the reinforcing rib a4 is further provided, and the manufacturing cost is relatively high. Further, in order to avoid interference between the anchor sleeve a2 or the base plate a3 and the tensile material (rebar or PC steel material) in the foundation bottom slab b, end portions of the tensile materials b1, b1,. Is further bent, and further, tension members b2, b2,... Extending in the circumferential direction are disposed so as to secure a space for installing the anchor sleeve a2 and the base plate a3. Therefore, the construction work such as the installation work of the tensile material for the foundation bottom plate, the installation of the anchor, and the installation of the tensile material for reinforcement are complicated, and thus the workability cannot be denied.

  As a conventional technique for fixing the anchor to the base bottom plate, for example, a technique disclosed in Patent Document 1 can be cited. This is a structure where the bridge pier and the foundation are connected with a tension material, but a plurality of perforated anchor plates are embedded in the foundation bottom slab. The present invention relates to a bridge structure in which a tension material that can be introduced is penetrated and a pier and a foundation bottom plate are connected by a pretension method.

LNG Ground Storage Tank Guidelines JGA Finger-108-02 (Japan Gas Association Gas Works Technical Standards Investigation Committee) 4.5.1.6 Inner Tank Anchor Japanese Patent Laid-Open No. 11-21816

  According to the bridge structure disclosed in Patent Document 1, even if a horizontal force at the time of an earthquake acts on a bridge pier due to an anchor made of a tension material, the possibility of pull-out shear failure occurring in the anchor is reduced. However, since the anchor is provided through the foundation bottom plate, it does not solve the problem of interference with the reinforcement in the foundation bottom plate, and therefore it is difficult to expect improvement in workability.

The present invention has been made in view of the problems described above, formed by joint Gukoto a sidewall and foundation bottom plate constituting the reservoir tank at anchor can be achieved cost reduction of manufacturing cost and improvement in workability and to provide a connection structure of the side wall and the base bottom plate being.

  In order to achieve the above object, an anchor according to the present invention is an anchor that connects a side wall and a base bottom plate in a storage tank composed at least of a base bottom plate and a side wall provided on the base bottom plate, The anchor includes a long anchor member, a base plate fixed to one end of the anchor member and in contact with the upper surface of the base bottom plate, and one or more anchors fixed to the lower surface of the base plate and embedded in the base bottom plate. And a hole plate.

  The anchor of the present invention is suitable for, for example, a ground-type or underground-type storage tank comprising at least a foundation bottom plate and a side wall, and the tank contents are not particularly limited. For example, a flat shape or a dome-shaped ceiling is attached to the upper portion of the side wall. The storage tank is not particularly limited in its structural form, such as a reinforced concrete structure or a prestressed concrete structure. For example, both the foundation bottom slab and side wall are reinforced concrete, both are prestressed concrete, the foundation bottom is concrete or prestressed concrete, and the side wall is a combination of S (steel) and so on. Further, the foundation bottom plate may be a direct foundation type supported directly on the ground, or a pile foundation type supported by a steel pipe pile, a PHC pile, an SRC pile, a cast-in-place RC pile, or the like.

  The anchor member to be used is not particularly limited as long as it is a material having a required tensile strength, such as a long flat steel or a steel bar.

  The anchor member is connected to the side wall at one end, and a base plate is fixed to the other end. The base plate is made of, for example, steel or precast concrete. The anchor member and the side wall can be connected by welding or bolting, for example. On the other hand, the anchor member and the base plate can be similarly fixed by welding or bolting.

  The base plate described above is placed on the base bottom plate. One or more perforated plates made of steel are fixed to the lower surface of the base plate by, for example, welding. By embedding the perforated plate in the base bottom plate, the perforated plate, the base plate, the anchor member, Through this, the side wall and the foundation bottom plate can be firmly connected.

  The perforated plate is passed through a reinforcing bar or a PC steel material (PC steel wire, PC steel bar, etc.) that is laid out in the foundation bottom slab, thereby increasing the connection strength between the perforated plate and the foundation bottom slab. Can be solid. In addition to holes for penetrating tensile materials, stud perforated plates are fixed to one or both sides of the perforated plate in order to enable a stronger connection to the base bottom plate. It may be in the form. Further, a hole other than the hole through which the tensile material for the base bottom slab penetrates may be formed in the perforated plate, and the reinforcing bars may be penetrated and fixed in the hole at the site. Furthermore, a flange for imparting bearing strength can be fixed to the lower end of the perforated plate. In the construction, concrete for the foundation bottom slab is placed after the tensile material (rebar or PC steel) of the foundation bottom slab is passed through the hole of the perforated plate constituting the anchor of the present invention.

  By using the anchor of the present invention, the problem of interference between the reinforcement in the foundation bottom slab and the anchor can be solved, and it is not necessary to dispose the reinforcement after cutting the reinforcement in the foundation bottom slab. Therefore, workability can be remarkably improved. Moreover, since the structure of the anchor is an extremely simple structure comprising an anchor member, a base plate, and, for example, two perforated plates, the anchor of the present invention can be manufactured at low cost. In addition, since the base plate is installed on the foundation bottom plate, an anchor sleeve may be provided so as to surround the connection portion between the anchor member and the base plate. The problem of doing so cannot occur.

  In another embodiment of the anchor according to the present invention, the side wall is composed of at least a cylindrical cold insulation side wall and an inner tank side plate provided inside the cold insulation side wall, and the inner tank A side plate and the base bottom plate are connected to each other.

  For example, when the storage tank to which the anchor of the present invention is applied is an above-ground or underground tank for LNG storage, a side wall structure that does not allow the temperature (cold heat) of the contents to escape to the outside is indispensable. . Therefore, the anchor of the present invention is particularly suitable when the side wall constituting the storage tank is composed of a cylindrical cold insulation side wall and an inner tank side plate provided inside the cold insulation side wall. It is applied to the purpose of connecting the tank side plate and the foundation bottom plate. In addition, as a structure of a side wall, the structure by which the steel outer tank side plate was provided in the further outer side of the side wall for cold insulation may be sufficient. In the inner tank side plate of the storage tank, as described above, an upward force is generated by the pressure of the gas stored in the inner tank, and the upward moment is caused by the upward force, or the falling moment is reduced by a wind or an earthquake. It is. A tensile force is generated by the overturning moment, but the anchor connecting the inner tank side plate and the foundation bottom slab resists the tensile force, thereby maintaining the stability of the side wall. The anchor of the present invention is applied to a storage tank for such use. As described above, the anchor can be manufactured by eliminating the problem of interference between the simple structure and the bar arrangement in the foundation bottom plate. It is possible to reduce the cost required for the construction and improve the workability.

  Further, in another embodiment of the anchor according to the present invention, the two perforated plates are respectively arranged at intervals in the circumferential direction of a predetermined diameter, and the normal direction or the approximate method of the circumference. It is fixed to the base plate in a posture oriented in a line direction.

  For example, when the foundation bottom plate of the storage tank is formed in a circular shape in plan view, the reinforcement in the foundation bottom plate is arranged in the circumferential direction and the radial direction (radial direction), and the upper and lower sides of the foundation bottom plate In general, the bar arrangement is single or double. Moreover, as a tension | tensile_strength material used, the form which combined rebar, PC steel materials (PC steel bar, PC steel wire, PC steel strand), and them further is applied.

  Therefore, in the present invention, for example, two perforated plates constituting the anchor are anchors fixed to the base plate in a posture in which the perforated plates having a predetermined diameter are arranged at intervals in the circumferential direction. Here, the predetermined diameter means the diameter of the circumference formed by positioning the base plates of the plurality of anchors when a plurality of anchors are installed on the outer periphery of the cylindrical inner tank side plate. By arranging two opposed perforated plates in the circumferential normal direction or substantially normal direction (the perforated plate surface is oriented in the circumferential direction), both The tensile material in the circumferential direction of the foundation bottom slab can be passed through the hole drilled in the plate, and a stronger connection between the anchor and the foundation bottom slab is possible.

  According to the anchor of the present invention, the tensile material in the circumferential direction of the foundation bottom slab penetrates through the hole of the plate, and the perforated plate is in a substantially parallel state to the tensile material in the radial direction (radial direction) of the foundation bottom slab. Therefore, it does not interfere with the tensile material in any direction, and therefore there is no problem that the workability is lowered.

  In another embodiment of the anchor according to the present invention, the two perforated plates are fixed to the base plate while being spaced apart from each other in the radial direction of the circumference of a predetermined diameter. And

  The anchor of the present invention has two perforated plates spaced apart from each other in the radial direction (radial direction) from the center of the basic bottom plate in the basic bottom plate. However, the present invention relates to an anchor formed by fixing the two perforated plates to a base plate in an upright posture. Here, the perforated plate surface is in a posture orthogonal to the radial tensile material. By passing a reinforcing bar or PC steel material extending in the radial direction through the hole of the perforated plate, the perforated plate is constrained by the tensile material without cutting the tensile material, and the anchor and the base bottom plate. Connection strength can be improved.

  In such an anchor, the two perforated plates are arranged in parallel or substantially in parallel to the circumferentially extending tensile material. Therefore, the circumferential tensile material and the perforated plate Will not interfere.

  Moreover, the connection structure between the side wall and the foundation bottom plate according to the present invention is characterized in that a tensile material extending in the circumferential direction of the foundation bottom plate passes through the hole of the perforated plate constituting the anchor. As another embodiment, a tensile material extending in the radial direction of the foundation bottom slab is penetrated through the hole of the perforated plate constituting the anchor.

  By making the side wall and foundation bottom plate connection structure to which the anchor of the present invention described above is applied, the workability can be improved and the side wall and the foundation bottom plate can be firmly connected. In the form in which the side wall is composed of at least the inner tank side plate and the cold insulation side wall described above, the inner tank side plate and the foundation bottom plate are connected via the anchor of the present invention, whereby the side wall and the foundation bottom plate are obtained. A connection structure is formed.

  Moreover, the storage tank according to the present invention is characterized by comprising a connection structure between the side wall and the foundation bottom plate.

  Applications of the storage tank of the present invention include large-scale tanks to small-scale tanks, and further include above-ground tanks, underground tanks, and semi-underground tanks. Includes tanks that contain all contents, such as farm pounds.

  Further, as a preferred embodiment of the storage tank of the present invention, a cold insulation bottom plate is provided on the basic bottom plate, and a cylindrical cold insulation side wall and an inner tank side plate provided inside the cold insulation side wall are provided. And at least the side wall is installed on the ground.

  As a ground tank for LNG or LPG storage that needs to be kept cold, it is preferable to apply a storage tank having the connection structure of the side wall and the foundation bottom plate of the present invention. Applying anchors with a simpler structure because the structure of the side walls is a multiple structure, the reinforcement in the foundation bottom slab is generally overcrowded, and the reinforcement and PC steel are complex as tensile materials. As a result, it is possible not only to secure the connection strength, but also to significantly improve the workability, leading to a significant reduction in construction costs.

As can be understood from the above description, according to the connection structure of the side walls and the base bottom plate of the present invention, in addition to configuration of the anchor is extremely simple, it does not in any way interfere with the reinforcement in the foundation bottom plate Therefore, the anchor manufacturing cost can be reduced and the workability can be improved, so that the overall construction cost can be reduced. Further, by a tank structure with a connection structure of the side wall and the base bottom plate to the upper serial, while ensuring a sufficient connection strength of the side wall (e.g., the inner tank side plate) and the underlying bottom plate, a significant reduction in the construction cost Can be realized.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view showing the external appearance and internal structure of the LNG above-ground storage tank of the present invention, and FIG. 2 is a perspective view showing from the base bottom plate to a part of the side wall of the LNG above-ground storage tank of FIG. It is a figure, Comprising: The figure which showed the internal reinforcement arrangement | positioning inside a part of foundation bottom slab is each shown. FIG. 3 is a perspective view showing an embodiment of the anchor of the present invention, and FIG. 4 is a perspective view showing another embodiment of the anchor of the present invention. FIG. 5 is a longitudinal sectional view showing an embodiment of the connecting structure of the side wall and the foundation bottom plate of the present invention using the anchor shown in FIG. 3, and FIG. 6 is a view taken along arrow VI-VI in FIG. 7 is a longitudinal sectional view showing another embodiment of the connecting structure of the side wall and the foundation bottom plate of the present invention using the anchor shown in FIG. 4, and FIG. 8 is a view taken along arrows VIII-VIII in FIG. ing. Although the illustrated storage tank is an LNG ground-type storage tank, the storage tank formed by applying the anchor and the side wall-base bottom plate connection structure of the present invention is not limited to the illustrated embodiment or application. Of course. For example, the anchor of the present invention can be applied to a form in which a flange is attached to the lower end of the perforated plate, a form in which stud gibels are attached to the side surface of the perforated plate, or the like. Further, the storage tank of the present invention can be applied to an application for storing LPG, water, etc. in addition to LNG, and is not limited to a cylindrical side wall, and may be an elliptical or rectangular side wall in a plan view.

  FIG. 1 is a view showing an appearance of an LNG ground-type storage tank to which the anchor of the present invention is applied and a part of its internal structure. The LNG ground-type storage tank 100 is attached to the inside of the foundation bottom plate 2 supported by the piles 92, 92,..., The cold insulation bottom plate 3, the cylindrical cold insulation side wall 6 installed thereabove. It is comprised from the inner tank side plate 4, the outer tank side plate 5 attached to the outer side of the cold insulation side wall 6, and the dome-shaped ceiling 7 installed in the upper end of the side wall. Here, the inner tank side plate 4 and the foundation bottom plate 2 are connected by the anchor 1 of the present invention.

  LNG (liquefied natural gas) is stored in the inner tank side plate 4, and a liquid barrier 91 for preventing the liquefied natural gas from flowing out to the outside when the liquefied natural gas leaks is stored on the outer periphery of the storage tank 100. Is installed so as to surround the storage tank 100. In addition, the storage tank may be of a separate type such as an underground type or a semi-underground type as well as the above-mentioned ground type. Furthermore, when the ground is extremely strong, a direct basic type can be applied, The basic form may be applied directly after improving the ground to a depth of.

  FIG. 2 is a perspective view showing the foundation bottom plate 2 to a part of the side wall of the LNG ground-type storage tank 100, and is a diagram showing a bar arrangement inside a part of the foundation bottom plate 2. The anchors 1, 1,... Of the present invention are installed so as to connect the inner tank side plate 4 and the foundation bottom plate 2 with a certain interval along the circumferential direction of the cylindrical side wall.

  The bar arrangement form of the foundation bottom slab 2 is gradually expanded from the center of the foundation bottom slab 2 with the tension members 22, 22... Arranged radially (in the radial direction) from the center of the disk-like foundation bottom slab 2. Are substantially composed of ring-shaped circumferential tension members 21, 21,..., And further composed of tension members disposed so as to be orthogonal to each other in a plane (not shown). Further, in the foundation bottom slab 2, the tensile material is arranged at the upper side and the lower side. For example, the two-stage arrangement, the one-stage arrangement, and only necessary portions are arranged. It has a configuration in which two stages are arranged.

  Here, as the tensile material, a reinforcing bar of a predetermined specification (deformed bar steel SD295, SD345, etc.) and a PC steel material of a predetermined specification (PC steel bar, PC steel wire, PC steel wire) are applied in combination.

  FIG. 3 is a view showing an embodiment of the anchor of the present invention. The anchor 1 has a long anchor member 11 and an end 11a of the anchor member 11 and an end of the anchor sleeve 14 fixed by welding in a state where the end of the anchor 1 is loosely fitted in the anchor sleeve 14. The base plate 12 is composed of two perforated plates 13a and 13b fixed to the lower surface of the base plate 12 at intervals. The other end 11b of the anchor member 11 is connected to the outer surface of the inner tank side plate 4 by welding or bolting.

  In the two perforated plates 13a and 13b, holes 13a1,..., 13b1,. The tension members 21, 21,... Are fixed to the base plate 12 by welding in a posture standing in a direction perpendicular to or substantially perpendicular to the extending direction.

  In this anchor 1, the tensile material in the radial direction of the foundation bottom slab 2 is arranged between the two perforated plates 13a, 13b, and the perforated plates 13a, 13b are in either the circumferential direction or the radial direction. There is no worry of interfering with other tensile materials. Although not shown in the figure, a flange for imparting bearing strength can be provided at the lower end of the perforated plate, and further, a stud gibber bar projecting from one side or both sides of the perforated plate is provided. You can also. Furthermore, a separate screw hole can be drilled in the perforated plate, and for example, a reinforcing bolt can be screwed into the screw hole at the site.

  On the other hand, FIG. 4 illustrates another embodiment of the anchor of the present invention. In this anchor 1A, the holes 13a1,..., 13b1,... Of the two perforated plates 13a, 13b are formed on the lower surface of the base plate 12 so that the radial tensile members 22,. It is fixed in an upright position with an interval in the direction. Also in this anchor 1A, the tensile material in the circumferential direction of the foundation bottom slab 2 is arranged between the two perforated plates 13a and 13b, and the perforated plates 13a and 13b are either in the circumferential direction or in the radial direction. There is no worry of interfering with the tensile material in the direction.

  FIG. 5 is a longitudinal sectional view showing a connection structure 10 between the inner tank side plate 4 and the foundation bottom plate 2 to which the anchor 1 shown in FIG. 3 is applied. In addition, in the figure, illustration of the lower stripe of the foundation bottom slab 2 is omitted. At the time of construction, the anchor 1 is temporarily fixed prior to the arrangement of the upper reinforcement of the foundation bottom slab 2, and the upper reinforcements 21 and 22 in the foundation bottom slab 2 are arranged. The anchor 1 is manufactured in advance at a factory or a site yard, and the end of the anchor member 11 and the base plate 12 are fixed by welding W. In the reinforcement arrangement of the tensile material, the circumferential tensile material 21,... Penetrates through the holes of the perforated plates 13a, 13b. Thereafter, the concrete of the foundation bottom slab 2 is casted / cured, and the process proceeds to the construction of the bottom plate 3 for cold insulation and the construction of the side wall above it. For the construction of the side wall, first, the inner tank side plate 4 and the outer tank side plate 5 that can be used as a formwork are installed, the end of the anchor member 11 is welded W to the surface of the inner tank side plate 4, and then the cold insulation side wall 6 Concrete is placed.

  6 is a view taken in the direction of arrows VI-VI in FIG. As is apparent from the figure, since the tension members 22,... Extending in the radial direction are arranged between the perforated plates 13a, 13b constituting the anchor 1, the arrangement of the tension members 22,. At this time, there is no problem that the perforated plates 13a and 13b become obstacles. In addition, the embedding length of the perforated plates 13a and 13b in the foundation bottom slab 2 includes the frictional force with the foundation bottom slab concrete that resists the design tensile force, the position of the hole through which the circumferential tensile material 22,. It can be set as appropriate in consideration.

  The anchor 1 of the present invention allows the pulling force acting on the anchor 1 to be resisted by the frictional force between the tensile material, the perforated plate and the concrete by passing the tensile material of the foundation bottom plate 2 through the perforated plates 13a and 13b. In principle, it is not necessary to provide a separate pull-out resistance member. Therefore, in addition to being able to form the connection structure between the side wall and the foundation bottom slab with the required pulling strength while effectively using the tensile material of the foundation bottom slab, the construction of the anchor is extremely simple, so its production Cost is also low. Furthermore, since the workability is also good, it can contribute to shortening the construction period and lead to a reduction in the overall construction cost.

  FIG. 7 is a longitudinal sectional view showing a connection structure 10A between the inner tank side plate 4 and the foundation bottom slab 2 to which the anchor 1A shown in FIG. 4 is applied, and FIG. 8 is a view taken along arrows VIII-VIII in FIG. is there. As is apparent from the figure, since the tension members 21,... Extending in the circumferential direction are arranged between the perforated plates 13a, 13b constituting the anchor 1A, the arrangement of the tension members 21,. At this time, there is no problem that the perforated plates 13a and 13b become obstacles.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.

The schematic diagram which showed the external appearance of the LNG ground type storage tank of this invention, and its internal structure. It is the perspective view which showed from the foundation bottom plate of the LNG ground type storage tank of FIG. 1 to a part of side wall, and the figure which showed the reinforcement arrangement | positioning inside a part of foundation bottom plate. The perspective view which showed one Embodiment of the anchor of this invention. The perspective view which showed other embodiment of the anchor of this invention. The longitudinal section which showed one Embodiment of the connection structure of the side wall of this invention which uses the anchor shown in FIG. 3, and a foundation bottom slab. VI-VI arrow line view of FIG. The longitudinal section which showed other embodiment of the connection structure of the side wall of this invention which uses the anchor shown in FIG. 4, and a foundation bottom plate. VIII-VIII arrow line view of FIG. The longitudinal cross-sectional view which showed the connection structure of the side wall and foundation bottom plate which used the conventional anchor.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,1A ... Anchor, 11 ... Anchor member, 12 ... Base plate, 13a, 13b ... Perforated plate, 13a1, 13b1 ... Hole, 14 ... Anchor sleeve, 2 ... Base bottom plate, 21 ... Tensile material, 22 ... Tensile material, 3 ... Bottom plate for cold insulation, 4 ... Side plate on inner tank, 5 ... Side plate on outer tank, 6 ... Side wall for cold insulation, 7 ... Ceiling, 10,10A ... Connection structure, 100 ... LNG ground type storage tank

Claims (3)

A low temperature storage tank for a liquid storage tank, comprising at least a base bottom plate in which a tensile material extending in the radial direction, a tensile material extending in a circumferential direction having a predetermined diameter is arranged, and a side wall provided on the base bottom plate A connecting structure for connecting the side wall and the base bottom plate with an anchor,
A long anchor member, a base plate fixed to the lower end of the anchor member and in contact with the upper surface of the foundation bottom plate, and a plurality of perforated plates fixed to the lower surface of the base plate and embedded in the foundation bottom plate And anchors are arranged at regular intervals along the circumferential direction of the cylindrical side wall,
Said plurality of perforated plates at intervals in the circumferential direction of a predetermined diameter are disposed in a posture directed is perforated plate facing the circumferential direction, extending in the circumferential direction of the underlying bottom plate tension member The side wall is formed by penetrating through the holes of the plurality of perforated plates, and extending in the radial direction between the plurality of perforated plates and extending radially in the base bottom plate. And foundation bottom plate connection structure. A low temperature storage tank for a liquid storage tank, comprising at least a base bottom plate in which a tensile material extending in the radial direction, a tensile material extending in a circumferential direction having a predetermined diameter is arranged, and a side wall provided on the base bottom plate A connecting structure for connecting the side wall and the base bottom plate with an anchor,
A long anchor member, a base plate fixed to the lower end of the anchor member and in contact with the upper surface of the foundation bottom plate, and a plurality of perforated plates fixed to the lower surface of the base plate and embedded in the foundation bottom plate And anchors are arranged at regular intervals along the circumferential direction of the cylindrical side wall,
The plurality of perforated plates are arranged in a posture in which the perforated plate surface is directed in the radial direction at intervals in the radial direction, and a tensile material extending in the radial direction of the foundation bottom slab is provided in the plurality of perforated plates. A connection between the side wall and the base bottom plate, wherein a circumferentially extending tensile material penetrating through the hole of the hole plate and extending between the plurality of perforated plates is arranged in the base bottom plate. Construction.   The side wall is composed of at least a cylindrical cold insulation side wall and an inner tank side plate provided inside the cold insulation side wall, and connects the inner tank side plate and the foundation bottom plate. The connection structure of the side wall and the foundation bottom plate according to claim 1 or 2.

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