JP2017007711A - Structure of tank - Google Patents

Structure of tank Download PDF

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JP2017007711A
JP2017007711A JP2015125572A JP2015125572A JP2017007711A JP 2017007711 A JP2017007711 A JP 2017007711A JP 2015125572 A JP2015125572 A JP 2015125572A JP 2015125572 A JP2015125572 A JP 2015125572A JP 2017007711 A JP2017007711 A JP 2017007711A
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liquid
tank
stopper
breakwater
liquid barrier
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宗久 藤田
Munehisa Fujita
宗久 藤田
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Shimizu Construction Co Ltd
Shimizu Corp
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Shimizu Construction Co Ltd
Shimizu Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a structure of a tank by which work periods and work costs can be reduced.SOLUTION: In a structure of a tank 1 having a base slab 2, an inner tank 3 installed on the base slab 2, PC liquid-proof dikes 4, installed on the base slab 2, which surround the inner tank 3, there are further provided sliding bearings 5 which allow the base slab 2 and the PC liquid-proof dikes 4 to move relatively in a horizontal direction, and stoppers 6 that protrude upward from the base slab 2 and surround the PC liquid-proof dikes 4 at predetermined intervals. Between the PC liquid-proof dikes 4 and the stoppers 6 are provided elastic members 7 that can be elastically deformed.SELECTED DRAWING: Figure 1

Description

本発明は、液化ガスなどを貯蔵するタンクの構造に関する。   The present invention relates to a tank structure for storing liquefied gas and the like.

液化天然ガス（ＬＮＧ）等の極低温の液化ガスなどを貯蔵するタンクとして、内槽の外周にプレストレスが導入されたＰＣ構造のＰＣ防液堤が設けられたものが知られている（例えば、特許文献１参照）。このようなタンクでは、ＰＣ防液堤は基礎版と剛結されている。   As a tank for storing a cryogenic liquefied gas such as liquefied natural gas (LNG), a tank having a PC structure PC breakwater with prestress introduced on the outer periphery of the inner tank is known (for example, , See Patent Document 1). In such a tank, the PC breakwater is rigidly connected to the base plate.

特開２００９−２９９７４９号公報JP 2009-299749 A

ところで、ＰＣ防液堤にはプレストレスにより下端部の外周側に引張応力が発生するため、この引張応力に抵抗できるように、ＰＣ防液堤と基礎版との連結部にＰＣ鋼棒を配置したり、ＰＣ防液堤に鉛直方向に延びるＰＣテンドンを配置したり、ＰＣ防液堤の外周側の縦筋を増加させたりする必要がある。また、ＰＣ防液堤の下部に効果的にＰＣ鋼棒を配置するために、ＰＣ防液堤の下部の外側にハンチを設けることがある。
このため、液化ガスなどを貯蔵するタンクのＰＣ防液堤を有するタンクの施工には、工期および工費がかかるという問題がある。 By the way, because the tensile stress is generated on the outer periphery of the lower end due to pre-stress in the PC breakwater, a PC steel rod is placed at the connection between the PC breakwater and the base plate so that it can resist this tensile stress. It is necessary to arrange a PC tendon extending in the vertical direction on the PC liquid bank, or to increase the vertical streaks on the outer peripheral side of the PC liquid bank. Moreover, in order to arrange | position a PC steel rod effectively in the lower part of PC liquid barrier, a haunch may be provided in the outer side of the lower part of PC liquid barrier.
For this reason, there is a problem in that the construction of the tank having the PC liquid breakwater for storing the liquefied gas or the like takes a construction period and a construction cost.

そこで本発明は、工期および工費を削減することができるタンクの構造を提供することを目的とする。   Then, an object of this invention is to provide the structure of the tank which can reduce a construction period and a construction cost.

上記目的を達成するため、本発明に係るタンクの構造は、基礎版と、該基礎版の上に設置された内槽と、前記基礎版の上に設置されて前記内槽を囲むＰＣ防液堤と、を有するタンクの構造において、前記基礎版と前記ＰＣ防液堤とを水平方向に相対移動可能とするすべり支承と、前記ＰＣ防液堤を該ＰＣ防液堤との間に所定の間隔をあけて囲むストッパと、を有することを特徴とする。   In order to achieve the above object, the structure of the tank according to the present invention includes a basic plate, an inner tank installed on the basic plate, and a PC liquid-proofing solution installed on the basic plate and surrounding the inner tank. In the structure of the tank having a bank, a sliding bearing that allows the base plate and the PC liquid bank to move relative to each other in a horizontal direction, and the PC liquid bank is a predetermined gap between the PC liquid bank And a stopper that surrounds at intervals.

本発明では、ＰＣ防液堤が基礎版と剛結されておらず、すべり支承によってストッパの内側において基礎版と水平方向に相対移動可能であることにより、ＰＣ防液堤の変位や変形によってＰＣ防液堤に発生する引張応力を軽減することができる。そして、基礎版とＰＣ防液堤とが剛結されている場合のように、ＰＣ防液堤の変位や変形によってＰＣ防液堤に発生する引張応力に抵抗するためにＰＣ鋼棒やＰＣテンドンを配置したり、ＰＣ防液堤の外周側の縦筋を増加させたりする必要がないため、タンクの施工にかかる工期および工費を削減することができる。   In the present invention, the PC breakwater is not rigidly connected to the foundation slab, and can be moved relative to the foundation slab in the horizontal direction inside the stopper by a sliding support. The tensile stress generated in the breakwater can be reduced. PC steel bars and PC tendons are used to resist the tensile stress generated in the PC breakwater due to the displacement and deformation of the PC breakwater, as in the case where the foundation plate and the PC breakwater are rigidly connected. Since it is not necessary to arrange the vertical lines or increase the vertical streaks on the outer peripheral side of the PC liquid barrier, it is possible to reduce the construction period and construction cost for the construction of the tank.

また、本発明に係るタンクの構造では、前記ＰＣ防液堤と前記ストッパとの間には、弾性変形可能な弾性部材が設けられていることが好ましい。
このような構成とすることにより、ＰＣ防液堤の変位や変形によってストッパを介して基礎版に伝わる作用力を軽減させることができる。また、弾性部材に止液機能を持たせることにより、万一内槽から内容液が流出した場合でも、ＰＣ防液堤とストッパとの間から内容液が流出することを防止できる。 In the tank structure according to the present invention, it is preferable that an elastic member capable of elastic deformation is provided between the PC liquid barrier and the stopper.
By setting it as such a structure, the action force transmitted to a base plate via a stopper by the displacement and deformation | transformation of PC liquid barrier can be reduced. Further, by providing the elastic member with a liquid stopping function, it is possible to prevent the content liquid from flowing out between the PC liquid barrier and the stopper even if the content liquid flows out from the inner tank.

本発明によれば、タンクの施工にかかる工期および工費を削減することができる。   ADVANTAGE OF THE INVENTION According to this invention, the construction period and construction cost concerning construction of a tank can be reduced.

本発明の実施形態によるタンクの構造の一例を示す図である。It is a figure which shows an example of the structure of the tank by embodiment of this invention. 図１のＡ部分拡大図で内槽を省略した図である。It is the figure which abbreviate | omitted the inner tank in the A partial enlarged view of FIG.

以下、本発明の実施形態によるタンクの構造について、図１および図２に基づいて説明する。
図１に示すように、本実施形態によるタンク１は、基礎版２と、基礎版２の上に設置され例えば液化ガスなどが貯蔵される内槽３と、基礎版２の上に設置されて内槽３を囲むＰＣ防液堤４と、基礎版２とＰＣ防液堤４とを水平方向に相対移動可能に支持するすべり支承５と、基礎版２から上方に突出しＰＣ防液堤４を所定の間隔をあけて囲むストッパ６と、ＰＣ防液堤４とストッパ６との間に設けられた弾性部材７と、を有している。 Hereinafter, the structure of a tank according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.
As shown in FIG. 1, a tank 1 according to the present embodiment is installed on a base plate 2, an inner tank 3 that is installed on the base plate 2 and stores, for example, liquefied gas, and the base plate 2. A PC breakwater 4 surrounding the inner tub 3, a sliding support 5 that supports the base plate 2 and the PC breakwater 4 so as to be movable relative to each other in the horizontal direction, and a PC breakwater 4 protruding upward from the foundation plate 2. It has a stopper 6 that surrounds with a predetermined interval, and an elastic member 7 provided between the PC liquid barrier 4 and the stopper 6.

基礎版２は、地盤に支持されていて、例えば鉄筋コンクリートなどで平面視において略円形状に形成されている。
内槽３は、例えば鋼材などで液化ガスなどを貯蔵可能な公知の構造で形成されている。内槽３は、平面視において略円形状の底部３１と、底部の縁部から立ち上がる円筒状の壁部３２と、中央部が上側に突出するように湾曲した屋根部３３と、を有している。内槽３は、基礎版２に固定されている。 The base plate 2 is supported by the ground and is formed in a substantially circular shape in plan view, for example, with reinforced concrete.
The inner tub 3 is formed of a known structure capable of storing liquefied gas or the like, for example, with a steel material. The inner tub 3 has a substantially circular bottom 31 in a plan view, a cylindrical wall 32 rising from an edge of the bottom, and a roof 33 curved so that the center protrudes upward. Yes. The inner tank 3 is fixed to the basic version 2.

ＰＣ防液堤４は、内槽３の壁部３２を囲む略円筒状に形成されていて、プレストレスが導入されている。ＰＣ防液堤４は、上端部が内層３の壁部３２の上端部近傍の高さに配置されている。ＰＣ防液堤４は、内槽３内の液化ガスなどの内容液が万一流出した場合に、流出した内容液を内側に収容可能な形状に形成されている。   The PC liquid breakwater 4 is formed in a substantially cylindrical shape surrounding the wall portion 32 of the inner tub 3 and prestress is introduced. The PC liquid barrier 4 is arranged at a height near the upper end of the wall 32 of the inner layer 3 at the upper end. The PC liquid breakwater 4 is formed in a shape that can accommodate the outflowed content liquid inside if the content liquid such as liquefied gas in the inner tank 3 flows out.

図２に示すように、すべり支承５は、表面がテフロン（登録商標）などで加工された第１金属板５１と、第１金属板５１上をスライド可能な第２金属板５２とを有している。本実施形態では、第１金属板５１が基礎版２の上面に固定され、第２金属板５２がＰＣ防液堤４の下面に固定されている。第１金属板５１は、基礎版２の上面のうちの平面視においてＰＣ防液堤４と上下方向に重なる領域およびその近傍の領域に設けられている。
基礎版２とＰＣ防液堤４との間にすべり支承５が設けられることにより、ＰＣ防液堤４は、第１金属板５１とともに基礎版２（第２金属板５２）上を水平方向に移動可能となっている。
なお、第１金属板５１の上面と第２金属板５２の下面との間に隙間が生じないように、第１金属板５１の上面および第２金属板５２の下面は平坦面に成形されていている。 As shown in FIG. 2, the sliding support 5 includes a first metal plate 51 whose surface is processed with Teflon (registered trademark) or the like, and a second metal plate 52 that can slide on the first metal plate 51. ing. In the present embodiment, the first metal plate 51 is fixed to the upper surface of the base plate 2, and the second metal plate 52 is fixed to the lower surface of the PC liquid barrier 4. The first metal plate 51 is provided in a region of the upper surface of the base plate 2 that overlaps the PC liquid barrier 4 in the vertical direction and a region in the vicinity thereof.
By providing the sliding support 5 between the base plate 2 and the PC breakwater 4, the PC breakwater 4 and the first metal plate 51 are horizontally moved on the base plate 2 (second metal plate 52). It is movable.
The upper surface of the first metal plate 51 and the lower surface of the second metal plate 52 are formed flat so that no gap is generated between the upper surface of the first metal plate 51 and the lower surface of the second metal plate 52. ing.

ストッパ６は、例えば鉄筋コンクリートなどで基礎版２と一体に形成されていて、ＰＣ防液堤４の下端部近傍を囲繞する略円筒状に形成されている。
弾性部材７は、弾性変形可能なウレタンやゴムなどで形成されている。弾性部材７は、ＰＣ防液堤４の下端部近傍の外周面とストッパ６の内周面との間全体に設けられていて、ＰＣ防液堤４の外周面とストッパ６の内周面との隙間を封止している。 The stopper 6 is formed integrally with the foundation slab 2 by, for example, reinforced concrete, and is formed in a substantially cylindrical shape surrounding the vicinity of the lower end portion of the PC liquid barrier 4.
The elastic member 7 is formed of urethane or rubber that can be elastically deformed. The elastic member 7 is provided between the outer peripheral surface in the vicinity of the lower end of the PC liquid barrier 4 and the inner peripheral surface of the stopper 6, and the outer peripheral surface of the PC liquid barrier 4 and the inner peripheral surface of the stopper 6 The gap is sealed.

本実施形態によるタンク１では、ＰＣ防液堤４が変位や変形により水平方向に移動しようとすると、基礎版２とＰＣ防液堤４との間にすべり支承５が設けられていることにより、基礎版２とＰＣ防液堤４とが水平方向に相対変位する。このとき、弾性部材７は、ＰＣ防液堤４とストッパ６との間隔に追従して弾性変形する。万一内槽３から内容液が流出した場合は、ＰＣ防液堤４がストッパ６に近付くが、弾性部材７がこの作用力を緩衝し、ストッパ６によりＰＣ防液堤４の変位（半径方向の外側に向かう変位）が拘束される。   In the tank 1 according to the present embodiment, when the PC liquid breakwater 4 tries to move in the horizontal direction due to displacement or deformation, the sliding support 5 is provided between the base plate 2 and the PC liquid breakwater 4. The base plate 2 and the PC breakwater 4 are relatively displaced in the horizontal direction. At this time, the elastic member 7 is elastically deformed following the distance between the PC liquid barrier 4 and the stopper 6. In the unlikely event that the content liquid flows out from the inner tank 3, the PC liquid barrier 4 approaches the stopper 6, but the elastic member 7 buffers this action force, and the stopper 6 displaces the PC liquid barrier 4 (in the radial direction). (Displacement toward the outside) is constrained.

次に、上述した本実施形態によるタンクの構造の作用・効果について図面を用いて説明する。
上述した本実施形態によるタンク１の構造では、基礎版２とＰＣ防液堤４とが剛結されておらず、すべり支承５によって基礎版２とＰＣ防液堤４とが水平方向に相対移動可能であることにより、ＰＣ防液堤４の変位や変形によってＰＣ防液堤４に発生する引張応力を軽減することができる。そして、基礎版２とＰＣ防液堤４とが剛結されている場合のように、ＰＣ防液堤４の変位や変形によってＰＣ防液堤４に発生する引張応力に抵抗するためにＰＣ防液堤４にＰＣ鋼棒やＰＣテンドンを配置したり、ＰＣ防液堤４の外周側の縦筋を増加させたりする必要がないため、タンク１の施工にかかる工期および工費を削減することができる。ＰＣ防液堤４の下部に効果的にＰＣ鋼棒を配置させるためにＰＣ防液堤４の下部の外側にハンチを設けることがあるが、本実施形態によるタンク１では、ハンチを設ける必要がなく、タンク１の施工にかかる工期および工費を削減することができる。 Next, operations and effects of the structure of the tank according to the above-described embodiment will be described with reference to the drawings.
In the structure of the tank 1 according to this embodiment described above, the base plate 2 and the PC liquid bank 4 are not rigidly connected, and the base plate 2 and the PC liquid wall 4 are relatively moved in the horizontal direction by the sliding support 5. By being possible, the tensile stress generated in the PC liquid breakwater 4 due to the displacement or deformation of the PC liquid breakwater 4 can be reduced. Then, in order to resist the tensile stress generated in the PC liquid breakwater 4 due to the displacement or deformation of the PC liquid breakwater 4 as in the case where the base plate 2 and the PC liquid breakwater 4 are rigidly connected, Since it is not necessary to place a PC steel rod or PC tendon on the liquid bank 4 or increase the vertical streaks on the outer periphery of the PC liquid wall 4, the construction period and cost for the construction of the tank 1 can be reduced. it can. A haunch may be provided outside the lower part of the PC liquid bank 4 in order to effectively arrange the PC steel bar at the lower part of the PC liquid bank 4, but in the tank 1 according to the present embodiment, it is necessary to provide a haunch. In addition, the construction period and construction cost for the construction of the tank 1 can be reduced.

また、ＰＣ防液堤４とストッパ６との間には、弾性変形可能な弾性部材７が設けられていることにより、ＰＣ防液堤４の変位や変形によってストッパ６を介して基礎版２に伝わる作用力を軽減させることができる。また、弾性部材７に止液機能を持たせることにより、万一内槽３から内容液が流出した場合でも、ＰＣ防液堤４とストッパ６との間から内容液が流出することを防止できる。   Further, an elastically deformable elastic member 7 is provided between the PC liquid barrier 4 and the stopper 6, so that the base plate 2 can be moved via the stopper 6 due to the displacement or deformation of the PC liquid barrier 4. The acting force transmitted can be reduced. Further, by providing the elastic member 7 with a liquid stop function, even if the content liquid flows out from the inner tank 3, it is possible to prevent the content liquid from flowing out between the PC liquid barrier 4 and the stopper 6. .

以上、本発明によるタンクの構造の実施形態について説明したが、本発明は上記の実施形態に限定されるものではなく、その趣旨を逸脱しない範囲で適宜変更可能である。
例えば、上記の実施形態では、ストッパ６は、基礎版２と一体に形成されているが、基礎版２と別々に形成されて基礎版２と剛結されていてもよい。 Although the embodiment of the tank structure according to the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention.
For example, in the above embodiment, the stopper 6 is formed integrally with the base plate 2, but may be formed separately from the base plate 2 and rigidly connected to the base plate 2.

また、上記の実施形態では、弾性部材７は、ＰＣ防液堤４の下端部近傍の外周面とストッパ６の内周面との間全体に設けられているが、ＰＣ防液堤４の下端部近傍の外周面とストッパ６の内周面との間にタンクの周方向に間隔をあけて複数設けられていてもよい。
また、上記の実施形態では、ＰＣ防液堤４とストッパ６との間に弾性部材７を設けて、弾性部材７がＰＣ防液堤４の変位や変形によってストッパ６に伝わる作用力を軽減させているが、ＰＣ防液堤４とストッパ６との間に弾性部材７を設けずに、ストッパ６がＰＣ防液堤４の変位や変形によって伝わる作用力に耐えられる形態に形成されていてもよい。
また、上記の実施形態では、ＰＣ防液堤４は、上端部が内層３の壁部３２の上端部近傍の高さに配置されるように形成されているが、ＰＣ防液堤４は、適宜設計された高さに形成されていてもよい。 In the above embodiment, the elastic member 7 is provided between the outer peripheral surface in the vicinity of the lower end portion of the PC liquid barrier 4 and the inner peripheral surface of the stopper 6. A plurality may be provided between the outer peripheral surface in the vicinity of the portion and the inner peripheral surface of the stopper 6 with an interval in the circumferential direction of the tank.
In the above embodiment, the elastic member 7 is provided between the PC liquid barrier 4 and the stopper 6, and the elastic member 7 reduces the acting force transmitted to the stopper 6 due to the displacement or deformation of the PC liquid barrier 4. However, the elastic member 7 is not provided between the PC liquid barrier 4 and the stopper 6, but the stopper 6 is formed in a form that can withstand the acting force transmitted by the displacement or deformation of the PC liquid barrier 4. Good.
In the above embodiment, the PC liquid breakwater 4 is formed so that the upper end portion is disposed at a height near the upper end portion of the wall portion 32 of the inner layer 3. You may form in the height designed suitably.

１ タンク
２ 基礎版
３ 内槽
４ ＰＣ防液堤
５ すべり支承
６ ストッパ
７ 弾性部材 DESCRIPTION OF SYMBOLS 1 Tank 2 Basic version 3 Inner tank 4 PC liquid barrier 5 Sliding bearing 6 Stopper 7 Elastic member

Claims (2)

基礎版と、
該基礎版の上に設置された内槽と、
前記基礎版の上に設置されて前記内槽を囲むＰＣ防液堤と、を有するタンクの構造において、
前記基礎版と前記ＰＣ防液堤とを水平方向に相対移動可能とするすべり支承と、
前記ＰＣ防液堤を該ＰＣ防液堤との間に所定の間隔をあけて囲むストッパと、を有することを特徴とするタンクの構造。 Basic version,
An inner tank installed on the foundation plate,
In the structure of a tank having a PC liquid breakwater installed on the foundation plate and surrounding the inner tank,
A sliding bearing that allows the base plate and the PC liquid bank to move relative to each other in a horizontal direction;
A tank structure comprising: a stopper that surrounds the PC liquid barrier with a predetermined interval between the PC liquid barrier and the PC liquid barrier. 前記ＰＣ防液堤と前記ストッパとの間には、弾性変形可能な弾性部材が設けられていることを特徴とする請求項１に記載のタンクの構造。   The tank structure according to claim 1, wherein an elastic member capable of elastic deformation is provided between the PC liquid barrier and the stopper.
JP2015125572A 2015-06-23 2015-06-23 Structure of tank Pending JP2017007711A (en)

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JP2016087343A (en) * 2014-11-11 2016-05-23 株式会社三洋物産 Game machine

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JPS53137415A (en) * 1977-05-09 1978-11-30 Kawasaki Heavy Ind Ltd Earthquake-proof flat-bottom cylindrical tank of non-vibration structure
JPS54134908U (en) * 1978-03-13 1979-09-19
JPS5735297U (en) * 1980-08-06 1982-02-24
JP2007253968A (en) * 2006-03-22 2007-10-04 Nishimatsu Constr Co Ltd Earthquake-isolating device, and floating roof type tank
JP2013159361A (en) * 2012-02-03 2013-08-19 Shimizu Corp Liquid stopping bank, and structure
JP2015025324A (en) * 2013-07-29 2015-02-05 西松建設株式会社 Slide type breakwater

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Publication number Priority date Publication date Assignee Title
JPS53137415A (en) * 1977-05-09 1978-11-30 Kawasaki Heavy Ind Ltd Earthquake-proof flat-bottom cylindrical tank of non-vibration structure
JPS54134908U (en) * 1978-03-13 1979-09-19
JPS5735297U (en) * 1980-08-06 1982-02-24
JP2007253968A (en) * 2006-03-22 2007-10-04 Nishimatsu Constr Co Ltd Earthquake-isolating device, and floating roof type tank
JP2013159361A (en) * 2012-02-03 2013-08-19 Shimizu Corp Liquid stopping bank, and structure
JP2015025324A (en) * 2013-07-29 2015-02-05 西松建設株式会社 Slide type breakwater

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016087343A (en) * 2014-11-11 2016-05-23 株式会社三洋物産 Game machine

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