WO2017043567A1 - 円筒型タンクの構築方法 - Google Patents

円筒型タンクの構築方法 Download PDF

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Publication number
WO2017043567A1
WO2017043567A1 PCT/JP2016/076428 JP2016076428W WO2017043567A1 WO 2017043567 A1 WO2017043567 A1 WO 2017043567A1 JP 2016076428 W JP2016076428 W JP 2016076428W WO 2017043567 A1 WO2017043567 A1 WO 2017043567A1
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WO
WIPO (PCT)
Prior art keywords
tank
inner tank
side wall
side plate
liner
Prior art date
Application number
PCT/JP2016/076428
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English (en)
French (fr)
Japanese (ja)
Inventor
寿一郎 山田
成貴 加藤
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株式会社Ihi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社Ihi filed Critical 株式会社Ihi
Publication of WO2017043567A1 publication Critical patent/WO2017043567A1/ja

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H7/00—Construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site
    • E04H7/02—Containers for fluids or gases; Supports therefor
    • E04H7/18—Containers for fluids or gases; Supports therefor mainly of concrete, e.g. reinforced concrete, or other stone-like material

Definitions

  • the present disclosure relates to a method for constructing a cylindrical tank. This application claims priority based on Japanese Patent Application No. 2015-179734 for which it applied to Japan on September 11, 2015, and uses the content here.
  • a cylindrical shell with a double shell structure having an inner tank and an outer tank is used for storing low-temperature liquids such as LNG (liquefied natural gas) and LPG (liquefied petroleum gas).
  • Patent Document 1 discloses a cylindrical tank having a metal inner tank and a concrete outer tank.
  • Patent Document 1 discloses a technique in which a metal inner tank and a concrete outer tank are simultaneously constructed in order to shorten the construction period of a cylindrical tank. Specifically, a jack stand is erected at the bottom of the outer tub, and the jack-up device is supported at a predetermined height (see FIG. 4B of Patent Document 1). And when performing the side wall construction of the outer tub, the inner tub roof and the outer tub roof are assembled on the bottom of the outer tub, and then the inner tub roof and the outer tub roof are raised by the jack-up device, By attaching the inner tank side plates to the tank roof in order from the top to the bottom, simultaneous construction of the metal inner tank and the concrete outer tank is realized.
  • the side wall of the outer tank is constructed as follows, for example. First, the bottom of the outer tub is constructed, and steel liner materials are sequentially stacked in layers on the bottom and fixed by welding. When the liner material has been assembled, the outer mold is then installed, and concrete is cast using the liner material as the inner mold to construct the sidewall of the outer tub. In this method, in order to prevent buckling due to wind load of an independent and independent liner material, the thickness of the liner material must be increased, and the amount of construction cannot be minimized.
  • the inventors of the present invention have assembled a liner material from the bottom of the outer tub, followed by assembling the liner material using the liner material as an inner mold, and assembling the side walls of the outer tub. Devised. According to this method, the assembling of the liner material and the placing of the concrete are performed in parallel with a certain interval, and the liner material is supported by the concrete within a certain range, so that buckling due to the wind load of the liner material can be suppressed. . In addition, it is possible to minimize the amount of construction by optimizing the thickness of the liner material.
  • the liner material (the uppermost liner material) assembled prior to the concrete is not supported by the concrete, and is independent and independent. For this reason, it is necessary to weld, for example, a yoke material or the like as a strong ring to the uppermost liner material.
  • a yoke material or the like gets in the way of the cold insulation work between the inner and outer tubs, it must be finally removed from the liner material. Therefore, a great deal of work is required to attach and remove the yoke material.
  • the present disclosure has been made in view of the above problems, and an object thereof is to provide a method for constructing a cylindrical tank that can easily maintain the shape of a liner material assembled prior to placing concrete.
  • the first aspect according to the present disclosure is a method for constructing a cylindrical tank having a metal inner tank and a concrete outer tank.
  • the steel liner material is assembled in advance from the bottom of the outer tub, and the concrete is cast using the liner material as the inner mold following the assembly of the liner material.
  • An outer tank side wall constructing step for constructing the side wall of the outer tank.
  • a plurality of scaffolding units including beam members are hooked on a plurality of receiving beams installed on an inward plate surface facing the inside of a tank of liner material assembled in advance.
  • a plurality of scaffolding units including beam members are hooked on a plurality of receiving beams installed on an inward plate surface of a liner material assembled prior to placing concrete, and the beams of the scaffolding unit
  • the members are connected in a ring shape.
  • an annular strong ring can be formed along the inward plate surface of the liner material.
  • the annularly connected beam members maintain the shape of an independent and self-supporting liner material and function as a buckling prevention material (so-called stiffener) due to wind load.
  • stiffener buckling prevention material due to wind load.
  • the scaffold units are connected in the circumferential direction of the tank by connecting the beam members, and the scaffold can be formed over the entire circumference of the tank, the construction of the liner material is facilitated.
  • the scaffold unit is hooked on the receiving beam of the liner material, the attachment and removal work of the scaffold unit is easy. Therefore, in the present disclosure, the shape of the liner material assembled prior to the concrete placement can be easily maintained.
  • FIG. 3 is an arrow B view shown in FIG. 2.
  • a ground type PC (prestressed concrete) double-shell storage tank for storing LNG is exemplified as the cylindrical tank.
  • FIG. 1 is a diagram illustrating a first step of a construction method according to an embodiment of the present disclosure.
  • this method first, construction of a substantially disk-shaped foundation plate 1 made of concrete (the bottom of the outer tub) is performed. Next, the bottom liner 6 is laid on the foundation plate 1. Then, the roof pedestal 7 is assembled at the center of the base plate 1. Moreover, the PC wall 2 (side wall of the outer tub) is constructed at the outer peripheral edge of the base plate 1 (outer tub side wall construction step).
  • the PC wall 2 is constructed by placing the side liner 2a (steel liner material) in advance from the base plate 1 and following the assembling of the side liner 2a to place concrete 2b using the side liner 2a as an inner mold. It is constructed by.
  • the side liner 2a is, for example, a large steel plate having a length of 4.5 m, a width of 12 m, and a thickness of 8 mm.
  • An outer scaffold 5 is installed on the outside of the side liner 2a, an outer mold (not shown) is assembled so as to face the side liner 2a, and concrete 2b is placed.
  • the side liner 2a is joined by welding in the circumferential direction so as to be cylindrical as a whole.
  • the next side liner 2a is welded to the upper part of the side liner 2a joined in a cylindrical shape, and similarly, the next side liner 2a is joined in a circumferential direction so as to be cylindrical as a whole.
  • Match it is preferable to perform welding of the side liners 2a by one-side welding from the inside of the tank.
  • the assembly of the side liner 2a and the placement of the concrete 2b are performed alternately. That is, when the side liner 2a is assembled in advance, the concrete 2b is placed using the lower side liner 2a as the inner mold. For this reason, the assembling of the side liner 2a and the placing of the concrete 2b are parallel operations with a certain interval. Thereby, the protrusion part L of the side liner 2a of the height which is not placing concrete 2b can be restrained to a certain fixed range. For this reason, when designing the side liner 2a, the thickness of the side liner 2a may be set so that the side liner 2a can stand independently in the projecting portion L, and the design amount is optimized to minimize the amount of construction. And cost can be reduced.
  • the protruding portion L of the side liner 2a receives a wind load alone.
  • an inner side scaffold is also required. Therefore, in this method, in the construction of the PC wall 2, the shape of the side liner 2a is maintained, used as a welding work scaffold for the side liner 2a, and also functions as a buckling prevention material (so-called stiffener) due to wind load.
  • the scaffold unit 100 is installed.
  • FIG. 2 is a side view showing an installation state of the scaffold unit 100 in the present embodiment.
  • FIG. 3 is an arrow A view shown in FIG. 4 is an arrow B view shown in FIG.
  • a plurality of receiving beams 101 are installed on the side liner 2a.
  • the receiving beam 101 is a steel material assembled in an L shape that extends in the horizontal direction from the side liner 2a and then rises in the vertical direction.
  • the receiving beam 101 is fixed to the inward plate surface 102 facing the tank inside of the side liner 2a by welding.
  • a plurality of receiving beams 101 are arranged at intervals in the longitudinal direction of the side liner 2a.
  • a plurality of receiving beams 101 are arranged so as to be hooked at three places in the longitudinal direction with respect to one scaffold unit 100.
  • the receiving beams 101 according to the present embodiment are arranged in two upper and lower rows, and are hooked to a total of six places on one scaffold unit 100.
  • the receiving beam 101 is preferably welded to the side liner 2a in advance on the ground before assembling the side liner 2a.
  • the scaffold unit 100 includes a beam member 110 that can be hooked on the receiving beam 101, and a scaffold 120 that is integrally fixed to the beam member 110.
  • the beam member 110 extends along the inward plate surface 102 in the longitudinal direction of the side liner 2a (the paper depth direction shown in FIG. 2).
  • the beam member 110 forms a stronger ring of the side liner 2a by being connected in an annular shape as will be described later, and maintains the shape of the side liner 2a.
  • the beam member 110 for example, an H-shaped steel having a cross-sectional dimension of 200 mm long ⁇ 200 mm wide is used.
  • the scaffold unit 100 includes two beam members 110 arranged one above the other. Each of the upper and lower beam members 110 is hooked on the receiving beam 101 at three locations as shown in FIG.
  • the scaffold unit 100 includes two scaffolds 120 that are fixed to the upper and lower beam members 110, respectively.
  • the scaffold 120 is supported by a plurality of projecting members 121 (see FIG. 4) welded to the beam member 110, a cross member 122 fixed to the ends of the plurality of projecting members 121, and the projecting member 121 and the cross member 122. Scaffolding plate 123.
  • An oblique member 124 is connected to the bottom of the scaffold 120 as shown in FIG.
  • One end of the oblique member 124 is fixed to the overhanging member 121 with a bolt or the like, and the other end of the oblique member 124 contacts the inward plate surface 102 of the side liner 2a.
  • the other end of the diagonal member 124 that supports the bottom of the upper scaffold 120 is fixed to a vertical member 125 that connects the upper and lower beam members 110 with a bolt or the like.
  • the other end of the diagonal member 124 that supports the bottom of the lower scaffold 120 is fixed to a vertical member 126 that extends downward from the lower beam member 110 with a bolt or the like.
  • the scaffold unit 100 includes a vertical member 126 that connects the upper and lower scaffolds 120. As shown in FIG. 3, a cross member 127 serving as a handrail is fixed to the vertical member 126. As shown in FIG. 3, a plurality of scaffold units 100 having the above configuration are attached to the side liner 2a. Specifically, a plurality of scaffold units 100 are attached by hooking the beam members 110 of the scaffold unit 100 to the receiving beam 101 as shown in FIG. The beam member 110 and the receiving beam 101 are preferably connected with a bolt or the like in order to maintain the hooked state. Note that the scaffold unit 100 may be attached to the side liner 2a in advance on the ground.
  • the beam members 110 of the scaffold unit 100 hooked to the receiving beam 101 are connected in an annular shape along the inward plate surface 102 of the side liner 2a (scaffold unit connecting step).
  • the beam members 110 are preferably connected to each other using a connection plate 130 such as a face plate to which a plurality of bolts can be fastened.
  • a connection plate 130 such as a face plate to which a plurality of bolts can be fastened.
  • the beam member 110 is connected by the connection plate 130 to form a strong ring having an annular shape (in detail, a polygonal annular shape close to a circle) that goes around the tank.
  • a plurality of scaffold units 100 including beam members 110 are hooked on a plurality of receiving beams 101 installed on the inward plate surface 102 of the side liner 2a assembled prior to the placing of the concrete 2b.
  • an annular strong ring is formed along the inward plate surface 102 of the side liner 2a.
  • the beam members 110 connected in an annular shape maintain the shape of the independent side liner 2a and function as a buckling prevention material (so-called stiffener) due to wind load.
  • stiffener a buckling prevention material due to wind load.
  • the scaffold unit 100 is connected in the circumferential direction of the tank by connecting the beam member 110 and can form a scaffold over the entire circumference of the tank, the side liner 2a can be easily constructed (welded or the like).
  • the scaffold unit 100 is hooked on the receiving beam 101 of the side liner 2a as shown in FIG. 2, the attachment and removal work of the scaffold unit 100 is easy. For example, if the bolting that maintains the hooked state of the beam member 110 and the receiving beam 101 is released, the scaffold unit 100 can be easily removed (lifted) from the side liner 2a with a crane or the like.
  • the receiving beams 101 are dotted and welded to the side liner 2a and each receiving beam 101 is small in a piece shape, the receiving beams 101 can be easily excised when disturbing during the cold insulation work described later.
  • the shape of the side liner 2a assembled prior to the placement of the concrete 2b can be easily maintained.
  • the scaffold unit 100 includes beam members 110 that are arranged above and below, and in the scaffold unit coupling step, each of the upper and lower beam members 110 is annularly coupled along the inward plate surface 102 of the side liner 2a.
  • the shape of the side liner 2a can be maintained with higher accuracy.
  • the radial position of the side liner 2a can be accurately adjusted by moving the side liner 2a in the radial direction with reference to the beam member 110 connected in an annular shape.
  • the assembly work of the scaffold unit 100 is performed. Etc. becomes easy.
  • the scaffold unit 100 includes a scaffold 120 fixed to each of the upper and lower beam members 110. According to this configuration, operations such as welding (vertical seam welding) between the side liners 2a adjacent to each other in the circumferential direction and inspection related to the welding are facilitated. Moreover, since the beam member 110 is H-shaped steel, the manufacturing cost of the scaffold unit 100 can be reduced as compared with the case where a custom-made steel material is used.
  • FIG. 5 is a diagram illustrating a second step of the construction method according to the embodiment of the present disclosure.
  • the PC wall 2 is constructed while attaching the scaffold unit 100 to the side liner 2a as described above.
  • an inner tank anchor strap 4 is installed on the base plate 1 inside the PC wall 2.
  • the construction port 8 for taking in the inner tank side plate 9 one by one in the base end part of the PC wall 2 is formed.
  • a plurality of gate-type mounts 10 for assembling the inner tank side plate are installed along the inside of the base end of the PC wall 2.
  • the gate-type gantry 10 is installed so that a cylindrical inner tank formed by combining a plurality of inner tank side plates 9 straddles the annular area X, which is an area to be finally lowered on the base plate 1.
  • the inner tank side plate 9 is placed on the gate-type gantry 10 and the inner tank side plates 9 adjacent in the circumferential direction are welded to each other so as to form a cylindrical shape as a whole. Further, the knuckle plate 11 is assembled to the upper end portion of the inner tank side plate 9.
  • the structural member 12 of the annular portion 13 such as a pearlite concrete block or a structural lightweight concrete block is temporarily placed in the annular region X under the portal frame 10.
  • the inner tank roof 14 is assembled on the roof mount 7. Further, the knuckle plate 11 is assembled to the outer peripheral edge portion of the inner tank roof 14.
  • the suspending side jack mount 16 (hanging point) is placed on the PC wall 2 above the knuckle plate 11.
  • the suspension-side jack mount 16 is installed so as to protrude substantially horizontally from the PC wall 2 having a predetermined height toward the inside of the tank.
  • the suspension-side jack mount 16 is fastened and fixed firmly, for example, to an anchor plate embedded in the PC wall 2 or the like.
  • a plurality of knuckle reinforcements 17 facing the plurality of suspension-side jack mounts 16 are installed on the knuckle plate 11.
  • the knuckle reinforcement member 17 projects from the knuckle plate 11 toward the inner / outer tank 15. Further, the knuckle reinforcing member 17 serves as a suspended base.
  • a jack-up device 18 is installed across the suspension-side jack mount 16 and the knuckle reinforcement member 17.
  • the jack-up device 18 is a center hole jack.
  • the device main body is installed on the suspension-side jack mount 16 and the lower end of the jack-up rod 19 is attached to the knuckle reinforcement member 17.
  • the jack-up device 18 When the jack-up device 18 is installed in this way, the roof mount 7 is removed, and the knuckle plate 11 is lifted by the jack-up device 18 to raise the inner tank side plate 9.
  • the jack-up device 18 When the inner tank side plate 9 is raised by the jack-up device 18 by one stroke of the jack-up rod 19 (corresponding to the vertical width of the inner tank side plate 9 alone in this embodiment), the jack-up device 18 lowers the inner tank side plate 9 by this jack-up.
  • the inner tank side plate 9 of the next stage is carried into the space formed.
  • FIG. 6 is a diagram illustrating a third step of the construction method according to the embodiment of the present disclosure.
  • the inner tank side plate 9 of the next stage is connected in the tank circumferential direction, the upper end thereof and the lower end of the raised inner tank side plate 9 are welded.
  • the inner tank side plate 9 integrated by this welding is jacked up by the jack-up device 18, and the next stage of the inner tank side plate 9 is carried into the space formed by the jack up in the lower part of the inner tank side plate 9.
  • the raising of the inner tank side plate 9 by the jack-up device 18 and the welding of the inner tank side plate 9 of the next stage to the lower part of the raised inner tank side plate 9 are alternately repeated (inner tank side wall construction step).
  • the inner tank side plate 9 is attached in order from the uppermost stage, and the first structure 9a excluding the lowermost stage of the inner tank side plate 9 is assembled.
  • the cold insulation work of the annular portion 13 is performed in parallel under the portal frame 10.
  • the leg portion 10 a disposed on the inner side of the tank than the annular portion 13 is moved onto the annular portion 13.
  • the foam glass 40 is placed on the bottom cooling resistance reducing material 39.
  • a pearlite concrete block (not shown) and an inner tank bottom plate (not shown) are laid on top of each other in this order.
  • FIG. 7 is a diagram illustrating a fourth step of the construction method according to the embodiment of the present disclosure.
  • the lowermost stage of the inner tank side plate 9 is assembled on the annular portion 13 separately from the first structure 9a.
  • the portal frame 10 After disassembling the portal frame 10, when the lowermost stage of the inner tank side plate 9 is placed on the annular portion 13, the inner tank side plates 9 adjacent to each other in the circumferential direction are welded together and joined together so as to be cylindrical.
  • the second structure 9b is assembled.
  • the inner tank anchor strap 4 installed on the foundation plate 1 is attached to the second structure 9b.
  • the outer tank roof 22 is assembled on the inner tank roof 14.
  • the outer tank roof 22 is connected to the inner tank roof 14 by a connecting material (not shown), and is assembled integrally with the inner tank roof 14.
  • an elevating staircase 23 is provided outside the PC wall 2.
  • the pump barrel 25 is carried inside the PC wall 2.
  • FIG. 8 is a diagram illustrating a fifth step of the construction method according to the embodiment of the present disclosure.
  • the first structure 9a is jacked down, the lower end portion of the first structure 9a is lowered to the upper end portion of the second structure 9b, and the first structure 9a is lowered.
  • the structure 9a and the second structure 9b are welded, and the inner tank 30 is assembled.
  • the assembly of the lowermost stage of the inner tank 30 is separated from the assembly of the inner tank 30 by the jack-up device 18, and the second structure 9 b that is the lowermost stage of the inner tank 30 is fixed on the annular portion 13. (See FIG. 7). Therefore, in this method, for example, fixing the inner tank 30 on the annular portion 13 which takes about one month does not become a critical path, and the construction period can be shortened compared to the conventional method.
  • the outer tub roof 22 is disconnected from the inner tub roof 14 by a connecting material (not shown) and installed on the upper end of the PC wall 2 assembled to the top.
  • a roof staircase 24 is provided on the outer tank roof 22.
  • a pump barrel 25 is also installed.
  • the knuckle reinforcement member 17 is cut off and the jackup device 18 is removed.
  • tension work on the PC wall 2 is performed.
  • the construction port 8 is closed, it is filled with water and a pressure and airtight test is performed.
  • FIG. 9 is a diagram illustrating a sixth step of the construction method according to the embodiment of the present disclosure.
  • the cold insulation material 44 is arranged between the inner and outer tanks 15 and the cold insulation material 44 is arranged between the inner tank roof 14 and the outer tank roof 22 to perform the cold insulation work.
  • the cylindrical tank 50 is constructed through painting work and pipe cooling work.
  • the above-described embodiment is a method for constructing a cylindrical tank 50 having a metal inner tank and a concrete outer tank.
  • this cylindrical tank construction method while assembling the steel side liner 2a in advance from the base plate 1, following the assembly of the side liner 2a, the concrete 2b is driven using the side liner 2a as the inner mold, It has an outer tank side wall construction process of constructing the PC wall 2.
  • the outer tub side wall construction step hangs a plurality of scaffold units 100 including beam members 110 on a plurality of receiving beams 101 installed on the inward plate surface 102 of the side liner 2a assembled in advance.
  • a scaffold unit connecting step of connecting the beam members 110 of the scaffold unit 100 hooked to 101 in a ring shape along the inward plate surface 102 of the side liner 2a is included.
  • the direction of the beam member 110A may be rotated by 90 ° with respect to the beam member 110 of the above embodiment.
  • the beam member 110A since the web connecting the flanges of the H-shaped steel is disposed perpendicular to the inward plate surface 102 (that is, the web extends in the horizontal direction), the beam member 110A is provided on the inward plate surface of the side liner 2a. It becomes strong against the load received from 102. Since it is difficult to connect the beam member 110A in this direction to the receiving beam 101 with a bolt or the like, it is preferable to fix the beam member 110A by driving a wedge member 140 into the gap as shown in FIG.

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  • Filling Or Discharging Of Gas Storage Vessels (AREA)
PCT/JP2016/076428 2015-09-11 2016-09-08 円筒型タンクの構築方法 WO2017043567A1 (ja)

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JP2015179734A JP6465488B2 (ja) 2015-09-11 2015-09-11 円筒型タンクの構築方法
JP2015-179734 2015-09-11

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Citations (2)

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Publication number Priority date Publication date Assignee Title
JP2014058793A (ja) * 2012-09-14 2014-04-03 Taisei Corp 多目的ポストを利用した防液堤の構築方法および壁体の構築方法
JP2015048621A (ja) * 2013-08-30 2015-03-16 川崎重工業株式会社 低温貯槽の建設方法及び低温貯槽

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Publication number Priority date Publication date Assignee Title
JP5422793B2 (ja) * 2008-10-29 2014-02-19 株式会社竹中工務店 低温貯槽の建設工法
CN101435276B (zh) * 2008-12-18 2010-06-02 中建二局第三建筑工程有限公司 筒仓结构构筑物仓顶钢梁液压提升就位装置及其施工方法
JP5732262B2 (ja) * 2011-01-18 2015-06-10 株式会社Ihi 円筒型タンクの構築方法
JP5998616B2 (ja) * 2012-04-26 2016-09-28 株式会社Ihi 独立ライナユニット及びタンクの建設方法
JP6018865B2 (ja) * 2012-09-28 2016-11-02 株式会社Ihi 円筒型タンクの構築方法
JP6127453B2 (ja) * 2012-11-06 2017-05-17 株式会社Ihi 円筒型タンクの構築方法
US9217255B2 (en) * 2012-11-30 2015-12-22 Chicago Bridge & Iron Company Self-jacking scaffold for large cylindrical tanks
JP6106540B2 (ja) * 2013-06-27 2017-04-05 株式会社Ihi 円筒型タンクの構築方法
JP6319869B2 (ja) * 2013-06-27 2018-05-09 株式会社Ihi 円筒型タンクの構築方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014058793A (ja) * 2012-09-14 2014-04-03 Taisei Corp 多目的ポストを利用した防液堤の構築方法および壁体の構築方法
JP2015048621A (ja) * 2013-08-30 2015-03-16 川崎重工業株式会社 低温貯槽の建設方法及び低温貯槽

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