TW201512503A - Method for constructing cylindrical tank - Google Patents

Abstract

This is a method for constructing a cylindrical tank that has a metal inner vessel and a concrete outer vessel. This method includes: a step of providing knuckle supports (10) on a knuckle plate (9); a step of mounting gondola rails (13) on the knuckle supports (10); a step of assembling the inner vessel by hanging up the knuckle plate (9) using jack-up devices (19) and mounting inner vessel side plates (7) below the raised knuckle plate (9); a step of mounting an inner vessel roof (14) on the knuckle plate (9); a step of mounting an outer vessel roof (26) on the inner vessel roof (14); a step of, after assembling the inner vessel, fixing the outer vessel roof (26) to side walls (3) of the outer vessel; and a step of, after fixing the outer vessel roof (26), mounting the gondola rails (13) on the outer vessel roof (26) by removing the knuckle supports (10) from the knuckle plate (9) and hanging up the knuckle supports (10) to raise the gondola rails (13). With this construction, it is possible to provide a method for constructing a cylindrical tank in which the gondola rails can be quickly set at different heights at low cost.

Description

Construction method of cylindrical groove

The present invention relates to a method of constructing a cylindrical groove.

The present application claims priority based on Japanese Patent Application No. 2013-135163, filed on Jun.

A cylindrical tank having a double-shell structure with an inner tank and an outer tank for storage of a cryogenic liquid such as LNG (liquefied natural gas) or LPG (liquefied petroleum gas). Patent Document 1 discloses a construction method of a cylindrical groove having a metal inner groove and a concrete outer groove.

Patent Document 1 discloses a method for constructing a groove made of a metal groove and a groove made of concrete in order to shorten the cycle time of the cylindrical groove. Specifically, the jack stand is erected at the bottom of the outer tub, and the jack up device is supported at a predetermined height (refer to FIG. 4(b) of Patent Document 1). Then, when performing the side wall work of the outer tank, the inner tank top cover and the outer tank top cover are assembled on the bottom of the outer tank, and then the inner tank top cover and the outer tank top cover are raised by the jack jacking device, while The inner side plates of the plurality of layers are sequentially mounted on the inner tank top cover from the uppermost layer toward the lowermost layer. Thereby, simultaneous construction of the inner groove of the metal and the groove other than the concrete is realized.

[Previous Technical Literature] [Patent Document]

Patent Document 1: Japanese Patent Laid-Open No. Hei 7-62924

In the above prior art, in order to inspect or repair the weld line between the inner groove side plates, it is necessary to inspect the gondola rail for hanging with the sky gondola. Further, particularly in the above prior art, the side wall of the outer groove and the side liner are simultaneously formed, and the side bushing is used as a molding machine for forming the side wall of the outer groove. . However, in the case of a bushing after attaching a side bushing after forming a side wall of the outer groove, for example, a cableway for hanging the bushing is required. Furthermore, after the side bushing is attached, it is necessary to blow the side bushing against the cold heat absorbing material, and it is also necessary to use the cable car track for the construction of the cold heat absorbing material.

However, the cable car track for the construction of the anti-cold tempering material and the cable car track for the suspension of the cable car for hanging in the inspection, for example, the knuckle portion used for raising the inner tank top cover, for example, is necessary. They are arranged at different heights, so it is necessary to set them separately. However, when the respective cable car tracks are separately provided, the time for setting the cable car tracks becomes long, and the construction period is prolonged, and the cost is also high.

The present invention has been developed in view of the above circumstances, and an object of the present invention is to provide a method of constructing a cylindrical groove capable of providing a cable car track at a different height in a short time and at a low cost.

A first aspect of the present invention is a method of constructing a cylindrical groove having a metal inner groove and a concrete outer groove, comprising: a step of assembling an annular joint portion inside the outer groove; a step of providing a plurality of suspended members coupled to the plurality of jack jacking devices at the joint portion; a step of installing the cable car track in the plurality of suspended members; and a side wall of the outer groove for suspending the plurality of a step of jacking up a plurality of suspension portions of the device; mounting the plurality of jacks between the plurality of suspension portions of the side wall of the outer groove and the plurality of suspended members of the joint portion a step of arranging the joint portion by the plurality of jack jacking devices and raising the joint portion, and attaching the inner groove side plate to the lower side of the raised joint portion to assemble the inner groove; assembling the inner portion The step of installing the inner tank top cover on the joint portion; and the step of installing the outer tank top cover on the inner tank top cover; assembling the inner groove After the step, the step of fixing the outer tank top cover to the side wall of the outer tank is performed; after the step of fixing the outer tank top cover to the side wall of the outer tank, the following steps are performed: the plurality of The suspension member is detached from the joint portion, and the plurality of suspended members are lifted by the plurality of jack lifting devices to raise the cableway track mounted on the plurality of suspended members to lift the cable car The rail is mounted on the outer tank top cover.

Moreover, a second aspect of the present invention is the method of constructing a cylindrical groove according to the first aspect, wherein the step of installing the outer groove top cover on the inner groove top cover is performed by combining a plurality of roots Before the cap bone is formed The outer tank top cover is described, and the plurality of jack jacking devices are disposed between the plurality of top cover bones.

Further, a third aspect of the present invention is the method for constructing a cylindrical groove according to the first or second aspect, further comprising: forming the side wall of the outer groove to the topmost portion, and the side wall The step of attaching the side bushing to the inner peripheral surface.

Further, a fourth aspect of the present invention is the method for constructing a cylindrical groove according to the first to third aspects described above, wherein in the step of assembling the joint portion, the ring is assembled in advance The joint portion is attached to the upper side of the inner side groove plate to assemble the joint portion, and in the step of assembling the inner groove, the inner groove side plate on the lower side of the joint portion which is raised by the plurality of jack lifting devices Install the next inner slot side panel.

Further, a fifth aspect of the present invention is the method of constructing the cylindrical groove according to the first to fourth aspects described above, wherein in the step of assembling the inner groove, a lower side of the joint portion is attached The treatment of the inner groove side plate and the process of attaching the other inner groove side plate to the lower one of the inner groove side plates have a process of providing a plurality of suspension portions above the side wall of the outer groove a plurality of second suspension portions, wherein the plurality of jack jacking devices are respectively repositioned between the second suspension portion and the plurality of suspended members, and the joint portion is assembled by the plurality of jack jacking devices Lift it further up and raise it.

According to the method of constructing the cylindrical groove of the present invention, the cable car track can be accompanied by the cable track being attached to the suspended member. The suspension member rises and rises. Thus, for example, an inspection gondola or a side liner can be suspended from the cable car track.

Moreover, after the outer tank top cover is fixed to the side wall of the outer tank, the suspended member is detached from the joint portion and lifted by the jack jacking device, and the cableway rail mounted on the suspended member is raised to lift the cable car The rail is mounted on the outer tank top cover. By raising the height of the cable car track in this way, the cable car track can also be used in the construction of anti-cold heat absorbing materials.

Therefore, by means of the jack jacking device for the assembly of the inner tank, it is necessary to reposition the cable car tracks which are necessary to be installed at different heights for different purposes, whereby the cable car track can be placed at a height suitable for each use. Since the reinstallation of such a cable car track can be performed at a low cost in a short time, the construction period can be shortened and the cost can be reduced.

1‧‧‧Basic base plate

2‧‧‧Internal groove anchor

3‧‧‧Side sidewalls

4‧‧‧Works

5‧‧‧Overhanging scaffolding

6‧‧‧With foot stand

7‧‧‧Inch side panel

8‧‧‧Top cover

9‧‧‧ joint plate (joint part)

10‧‧‧ Joint support (suspended member)

10a‧‧‧support plate

10b‧‧‧suspension board

10c‧‧‧ reinforcing plate

10d‧‧‧ incision

11‧‧‧Space armature

11a‧‧‧H steel

11b‧‧‧ steel plate

12‧‧‧Top bone

13‧‧‧ cable car track

14‧‧‧Inner tank top cover (slot top cover)

16‧‧‧Rings

16a‧‧‧ring plate

17‧‧‧ Jacks jacking device with scaffolding

18‧‧‧suspension platform (suspension)

19‧‧‧ jack jacking device

19a‧‧‧ nuts

20‧‧‧ jack jack

20a‧‧‧ jack body

20b‧‧‧ pole

21‧‧‧hanging balance

21a‧‧‧balance pole

21b‧‧‧ hammer

23a, 23b‧‧‧ Perlite concrete blocks

24‧‧‧Lightweight concrete blocks for construction

25‧‧‧2nd suspension frame (2nd suspension section)

26‧‧‧ outer tank top cover

27‧‧‧ Materials

28‧‧‧Working scaffolding

29‧‧‧Installation end

30‧‧‧Installation components

31‧‧‧Track support

32‧‧‧Traveling device

33‧‧‧Winding device

33a‧‧‧Roller

33b‧‧‧ hook

100‧‧‧Cylinder groove

X‧‧‧ring area

Y‧‧‧ trough components

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a side cross-sectional view showing the steps of an embodiment of the present invention.

Figure 2 is a side cross-sectional view showing the steps of an embodiment of the present invention.

Figure 3 is a side cross-sectional view showing the steps of an embodiment of the present invention.

Fig. 4 is a side cross-sectional view showing the main part of the installation state of the knuckle support and the space keeper.

Fig. 5 is a plan view showing the main part of the joint support and the space armature mounting state.

Fig. 6 is a plan view showing the top side of the cap bone including the outer groove top cover in the state in which the joint support and the space armature are mounted.

Figure 7 is a side cross-sectional view showing the steps of an embodiment of the present invention.

Figure 8 is a side cross-sectional view showing the steps of an embodiment of the present invention.

Figure 9 is a side cross-sectional view showing the main part of the steps of an embodiment of the present invention.

Figure 10 is a side cross-sectional view showing the steps of an embodiment of the present invention.

Figure 11 is a side cross-sectional view showing the steps of an embodiment of the present invention.

Figure 12 is a side cross-sectional view showing the steps of an embodiment of the present invention.

Figure 13 is a side cross-sectional view showing the steps of an embodiment of the present invention.

Figure 14 is a side cross-sectional view showing the steps of an embodiment of the present invention.

Figure 15 is a side cross-sectional view showing the steps of an embodiment of the present invention.

Figure 16 is a side cross-sectional view showing the steps of an embodiment of the present invention.

Figure 17 is a side cross-sectional view showing the steps of an embodiment of the present invention.

Figure 18 is a side cross-sectional view showing the main part of the steps of an embodiment of the present invention.

Figure 19 is a side cross-sectional view showing the main part of the steps of an embodiment of the present invention.

Figure 20 is a side cross-sectional view showing the main part of the steps of an embodiment of the present invention.

Figure 21 is a side cross-sectional view showing the steps of an embodiment of the present invention.

Hereinafter, an embodiment of a method of constructing a cylindrical groove according to the present invention will be described in detail with reference to the drawings. Further, in the following drawings, since each member is made recognizable, the scale of each member is appropriately changed. In the following description, as the cylindrical groove, a PC (prestressed concrete) double-layered storage tank in which LNG is stored is exemplified.

First, as shown in Fig. 1, a work of a substantially disk-shaped base plate (the bottom of the outer groove) 1 is performed, and a bottom bush (not shown) is formed on the base plate 1. At this time, in the present embodiment, an inner arm strap 2 is provided along the circumferential direction of the base plate 1 further than the outer peripheral portion of the base plate 1.

Next, the outer peripheral portion of the base plate 1 is further outside than the inner groove anchor 2, and a part of the side wall (PC wall) 3 of the outer groove is formed, for example, formed to the side wall 3 formed by stacking all of the 9 layers. The fifth layer (#5) is up.

In addition, the side wall (PC wall) of the outer groove formed here 3 A part of the lower layer side, for example, from the second layer to the third layer, forms the work opening 4. Further, since the side walls of the remaining layers are piled up on a part of the side wall 3 to finally form the side walls 3 composed of nine layers, it is necessary to assemble the mold boxes for the remaining layers. Therefore, the overhanging eagle 5 is provided in advance on a part of the upper side of the side wall 3, for example, the fourth layer or more.

After a part of the side wall 3 of the outer tank is formed in this manner, a plurality of the lead frame stages 6 for assembling the inner groove side plates are provided on the inner circumferential side of the side wall 3 along the circumferential direction thereof. The tripod stand 6 is a portal type stand for supporting the inner groove side plate 7 to be described later. The tripod stand 6 is disposed on the base plate 1 in a manner spanning an annular area X which serves as a cylindrical inner groove formed by a combination of a plurality of inner groove side plates 7 The area that was put down.

Next, as shown in Fig. 2, concrete is poured over a portion of the side wall 3 to form a side wall of the sixth layer (#6). In addition, when the construction of the side wall 3 is performed, the upper side of the side wall 3 is sequentially formed, and even the overhanging eagle 5 is sequentially piled up on the upper side, and the lower side of the suspended overhang which has become unnecessary is sequentially removed. 5.

Further, at the same time, on the pedestal stand 6, a plurality of inner groove side plates 7 which are a part of the side walls of the inner groove are vertically arranged along the circumferential direction of the side wall 3, and the laterally adjacent inner groove side plates 7 are integrally welded. Thereby, each of the inner groove side plates 7 is assembled into an annular shape. Further, the inner groove side plate 7 assembled here is the inner groove side plate 7 which is the uppermost layer of the inner groove (the ninth layer [#9] in the present embodiment). The inner groove side plate 7 is formed of a nickel (Ni) steel material or the like having excellent toughness and strength.

Further, inside the side wall 3, the top cover stand 8 is assembled by the center portion of the base plate 1.

Next, as shown in Fig. 3, a plurality of knuckle plates 9 (joint portions) are attached to the upper end portion of the uppermost inner groove side plate 7, whereby the joint plate 9 is assembled. The joint plate 9 is connected to the outer peripheral edge portion of the inner tank top cover 14 to be described later, and is bent downward. As described above, the upper end portion of the uppermost inner groove side plate 7 is connected to the lower end portion of the joint plate 9.

As shown in Figs. 4 to 6, the joint support 10 and the space armature 11 and the cable car track 13 are attached to the outer peripheral surface of the joint plate 9, respectively. In the present embodiment, as shown in Fig. 6, a plurality of (for example, 30) joint supports 10 are provided at equal intervals along the circumferential direction of the joint plate 9, and space armatures 11 are respectively provided between them. One. Further, as shown in Fig. 4, the cable car track 13 is attached to the lower end portion of the joint support 10 through the attachment member 30. In addition, in Fig. 6, reference numeral 12 is a top cover bone of an outer tank top cover which will be described later, and the joint support 10 is attached to the joint so as to be positioned between the adjacent top cover bones 12 and 12 which are arranged in a radial shape. Board 9.

The joint support 10 is made of a steel plate and is a suspended member that is coupled to a jack jacking device to be described later. As shown in Figs. 4 and 5, the joint support 10 is formed by a pair of support plates 10a, 10a, a suspended plate 10b, and a reinforcing plate 10c, and the pair of support plates 10a, 10a are formed to be viewed from the side. The suspension plate 10b is sandwiched between the support plates 10a and 10a and has a substantially square shape in plan view. The reinforcing plate 10c is sandwiched between the support plates 10a and 10a and is coupled to the suspended plate 10b. Above, between the support plates 10a, 10a and the suspended plate 10b.

As shown in Fig. 4, one of the side portions of the support plates 10a and 10b is bent in accordance with the curved shape of the joint plate 9, and is fixed to the curved surface of the joint plate 9 by welding or the like. The suspended plate 10b and the reinforcing plate 10c are attached to and fixed between the support plates 10a and 10a by welding or screw fixing as shown in Fig. 5 in a state of being joined to each other by welding or the like. The suspension plate 10b is fixed between the support plates 10a and 10a in a state in which the outer side end (end of the side wall 3 side) of the suspension plate 10b is aligned with the outer side ends of the support plates 10a and 10a. The suspended plate 10b is formed with a slit 10d that opens toward the opposite side of the joint plate 9, that is, the side wall 3 side of the outer groove. The slit 10d is a suspended point that is coupled to a jack jacking device to be described later.

As shown in FIGS. 4 and 5, the space armature 11 is provided so as to protrude outward from the outer peripheral surface of the joint plate 9. As shown in Fig. 6, the space armature 11 is disposed between the joint supports 10 provided at equal intervals along the circumferential direction of the joint plate 9. The space armature 11 is disposed at a substantially central portion between the adjacent joint supports 10 and 10, whereby the space armatures 11 are also disposed at equal intervals along the circumferential direction of the joint plate 9. Therefore, the space armature 11 and the joint support 10 are alternately arranged at equal intervals in the circumferential direction of the joint plate 9.

As shown in Fig. 4 and Fig. 5, the space armature 11 is formed by a pair of steel plates (not shown), H steel 11a, and steel plate 11b, and the pair of steel plates are not shown, for example, and the support plate 10a. Similarly, the joint plate 9 is attached, and the H steel 11a is interposed between the steel plates, and the steel plate 11b is attached to the outer end surface of the H steel 11a. In the present embodiment, the space armature 11 is located at the outer end of the space armature 11 at a side closer than the outer end of the suspended plate 10b. The outer side (the side wall 3 side of the outer groove) is formed in such a manner.

That is, the arrangement space armature 11 is formed such that the distance from the center of the joint plate 9 to the outer side end of the space armature 11 is longer than the distance from the center of the joint plate 9 to the outer side end of the suspension plate 10b. With this configuration, the space armature 11 can be used to reduce the substantial gap between the side wall 3 of the outer groove and the joint plate 9. Therefore, when the joint plate 9 is lifted by the jack jacking device described later, even if the joint plate 9 is displaced in the horizontal direction due to the influence of an earthquake or the like, the displacement amount can be reduced to alleviate the impact of the space armature 11 to the outer groove. The impact of the side wall 3 .

As shown in Fig. 4, the cable car track 13 is attached between the lower end portions of one of the pair of support plates 10a, 10a via the attachment member 30. As shown in Fig. 6, the cable car track 13 is formed in an annular shape along the circumferential direction of the side wall 3 of the outer groove. The mounting member 30 is made of, for example, a steel plate, H steel, a channel, or the like, and is attached and fixed to the support plates 10a and 10a by welding or screw fixing.

Further, the cable car track 13 is provided with a rail support 31 as shown in Fig. 5 which is different from the mounting member 30. The rail support 31 is provided in a portion different from the attachment member 30 attached to the joint support 10 in the circumferential direction of the cable car rail 13, that is, a portion corresponding to the roof bone 12. Thereby, when the joint support 10 is detached from the joint plate 9 as will be described later, and the cable car track 13 is lifted by the jack jacking device, the cable stay 13 can be attached to the roof bone 12 using the rail support 31. Similarly to the mounting member 30, the rail support 31 is made of a steel plate, H steel, channel steel, etc., and is simply mounted and fixed to the cable car track in the step shown in Fig. 3. 13 above the side.

Further, as shown in Fig. 4, on the cable car track 13, a traveling device 32 and a hoisting device 33 are suspended. The traveling device 32 is a known traveling device including a pair of roller portions (not shown) and a motor portion (not shown). The pair of roller portions are suspended from the lower end portion of the cable car track 13, and the motor portion is The roller is driven by rotation. Further, the hoisting device 33 is a known hoisting device including a drum 33a and a hook 33b, and the roller 33a is attached to the roller portion of the traveling device 32 through a holding member (not shown). The hook 33b is attached to the drum 33a via a steel cable.

By suspending the traveling device 32 and the hoisting device 33 to the cable car track 13 in advance, it is possible to move the inspection aerial cable car in order to perform inspection or repair of the weld line between the inner groove side plates 7 in the subsequent step. Hanging over the cable car track 13. Further, after the side wall 3 of the outer tank is formed, the side bushing attached to the inner circumferential surface of the side wall 3 can be suspended and suspended. Further, after the side bushing is attached to the side wall 3 of the outer tub, the aerial ropeway for the construction of the anti-cold heat-lowering material for injecting the anti-cold-tempering material against the side bushing can be movably suspended.

Next, as shown in Fig. 7, the inner tank top cover block is mounted on the top cover stand 8, and the inner tank top cover (slot top cover portion) 14 is assembled.

Further, a high-level work vehicle (not shown) is driven into the base floor 1. Further, in order to form the annular portion 16 in the annular region X below the pedestal table 6, a portion of the pedestal table 6 is constructed.

Further, the side walls 3 of the outer tank are also piled up on the upper side in order, and as shown in Fig. 7, the side wall 3 of the outer tank is applied to the ninth layer (#9) which becomes the final layer. stop. Further, at this point of time, the overhanging eagle 5 for forming the side wall 3 is left until, for example, the state from the sixth layer to the seventh layer has been formed.

Next, as shown in Fig. 8, the yoke 17 for jacking up the jack is assembled on the joint plate 9 in a state of being separated from the inner peripheral surface of the side wall 3 of the outer groove without interfering with the height of the overhanging eagle 5. The jack up device 17 is formed in a ring shape along the circumferential direction of the annular joint plate 9, thereby preventing the joint plate 9 from falling in the radial direction. Further, when the eagle frame 17 for the jack-up device is assembled, the dumping prevention material (not shown) is placed on the jack top in a state where the joint support 10 supports the substantially the entire eagle frame 17 for the jack-up device. The device is between the scaffold 17 and the joint plate 9 or the inner groove top cover 14. Thereby, the jack stand 17 for the jacking device to be fixed to the joint plate 9 or the inner groove top cover 14 can be formed. As shown in Fig. 8, in the present embodiment, the eagle jacking device is assembled at a position corresponding to the substantially fourth layer (#4) to the fifth layer (#5) of the side wall 3 of the outer tub. Rack 17.

The jack stand 17 is provided with a eagle frame 17 at a predetermined position of the side wall 3, and in the present embodiment, a fifth layer (#5), and a plurality of suspension frames are provided at equal intervals in the circumferential direction of the side wall 3. 18 (suspension). Specifically, the suspension frame 18 is firmly and detachably locked and fixed to, for example, an anchor plate that is embedded in the side wall 3 in advance, and is provided so as to protrude substantially horizontally from the side wall 3 toward the inner side thereof.

Next, a jack jacking device 19 is attached between the suspension stand 18 and the suspended plate 19b of the joint support 10, respectively. As shown in Figure 9 As shown, the jack jacking device 19 is a center hole jack having a jack body 20a that is supported by the suspension frame 18 and supported; a jack up rod 20, the upper end thereof The portion is attached to the jack body 20a, the lower end portion is attached to the suspended plate 10b of the joint support 10, and the nut 19a is for attaching the lower end portion of the jack jack 20 to the suspended plate 10b. Further, in Fig. 9, the description of the eagle frame 17 for the jack jacking device is omitted for easy reading.

When the jack jacking device 19 is installed, first, the jack jack 20 is suspended in a state in which the jack body 20a is engaged and fixed above the suspension frame 18, and the lower end of the jack jack 20 is inserted into the joint. The inside of the slit 10d of the suspended panel 10b of the support 10 is supported. Then, the lower end portion of the jack jack 20 is fixed to the suspended panel 10b by a nut 19a prepared in advance.

A plurality of jack jacking devices 19 are disposed at predetermined intervals in the circumferential direction of the side wall 3 of the outer tub, and then the respective jack jacking devices 19 are attached to the suspended panel 10b of the corresponding joint support 10, and then as shown in the eighth The top cover stand 8 is removed as shown. Thereby, the weight of the groove constituting member can be maintained by the plurality of jack jacking devices 19.

Here, as shown in Fig. 8, a suspension stand 18 is provided at a position corresponding to the fifth layer (#5) of the side wall 3, and a joint is provided at a position corresponding to the third layer (#3) of the side wall 3. Support 10. The jack jack 20 is formed to have a sufficient length corresponding to the length between the suspension frame 18 and the joint support 10. However, as will be described later, when the jack jacking device 19 is actuated to raise the jack jack 20, the jack jack 20 will Interference with the overhanging eagle 5 located directly above it.

In order to eliminate this problem, as shown in Fig. 9, the jack jack 20 is formed by detachably connecting a plurality of rods 20b in the longitudinal direction by screwing or the like.

Thereby, when the jack jacking rod 20 is raised, the rod 20b protruding further above the suspension frame 18 is cut away from the rod 20b on the lower side thereof, thereby preventing the jack jacking rod 20 from interfering with Overhanging scaffold 5. Further, reference numeral 21 in Fig. 8 denotes a known suspension balance for lifting or suspending each of the constituent members of the jack jacking device 19 or for suspending the cut rod 20b, which has a balance rod 21a. And a hammer 21b provided at one end of the balance rod 21a. The suspension balance 21 is suspended by a crane (not shown), thereby controlling the movement of the lifting or horizontal movement.

Further, in such a step, the holding work of the ring portion 16 and the cold keeping work at the center portion are simultaneously performed on the base plate 1. In the cold-keeping work of the annular portion 16, as shown in Fig. 9, a pearlite concrete block 23a, 23b is assembled under the bezel 6 and above the bottom anti-cold heat-releasing material 22. The lightweight concrete block 24 is constructed with an annular plate 16a mounted thereon. The annular portion 16 ultimately supports the assembled inner groove side plate 7. Therefore, the annular plate 16a of the annular portion 16 is formed to be thick, and the cold-preserving structure is also formed of a hard material such as a concrete block.

Next, as shown in Fig. 10, the joint plate 9 is lifted by the jack jacking device 19, thereby including the joint plate 9 and the inner groove top cover 14, the inner groove side plate 7, and the joint support 10 supported thereby. Space armature 11, The jack jacking device is raised by the groove constituent member Y of the eagle frame 17. Specifically, the jack body 20a is driven to rotate in the forward direction, whereby the jack jacking rod 20 is raised, and the joint support 10 and the groove in the assembly direction are used to form the member Y by the jack.

Here, since the joint plate 9 lifted by the jack jacking device 19 is connected to the inner tank top cover 14 and the inner groove side plate 7, the plate thickness is more thick than the inner groove side plate 7, and the strength is stronger. high. Therefore, even if the weight including the inner groove side plate 7 or the inner groove top cover 14 or even the jack jacking device 17 is attached, it does not buckle. Therefore, the inner groove side plate 7 on the lower layer side has a thicker plate thickness in order to receive a relatively large hydraulic pressure of the content liquid filled after completion of the groove, but the inner groove side plate 7 on the upper layer side (especially the uppermost layer) is only required It can withstand the relatively small hydraulic pressure of the content liquid, and can form a thin plate thickness. In the present embodiment, since the inner groove side plate 7 is not bent, the inner groove side plate 7 can be formed by the above-described optimum arrangement, and weight reduction and cost reduction can be obtained.

The groove forming member Y is raised by a portion of the inner groove side plate 7 by the jack jacking device 19, and then the inner groove side plate 7 of the next layer is carried into the space formed below the inner groove side plate 7. The loading of the inner tank side plate 7 is performed through the work opening 4 provided in the side wall 3. A first conveyance device (not shown) is provided around the work opening 4, and the inner groove side plate 7 can be sequentially conveyed to the bead stand 6 through the work opening 4 from the side wall 3 by the first conveyance device. Further, on the tripod stand 6, a second transport device (not shown) is provided along the circumferential direction of the side wall 3. The second conveying device has a rail (not shown) or the like along the circumferential direction of the side wall 3 for transporting to The inner groove side plates 7 from the leg stand 6 are further transported to the circumferential direction of the side walls 3 in order.

Next, the inner groove side plate 7 conveyed by the second conveying device is erected on the bead stand 6 and arranged in an annular shape below the inner groove side plate 7 which is jacked up by the jack. Then, as shown in Fig. 11, the laterally adjacent inner groove side plates 7 are integrally welded, and the inner groove side plates 7 arranged up and down are integrally welded to each other, whereby the inner groove side plates 7 are formed into an integral cylindrical shape. That is, the inner side groove side plate 7 of the eighth layer (#8) is attached below the inner side groove 7 of the ninth layer (#9) which is the uppermost layer.

Further, a plurality of the inner groove side plates 7 may be laterally joined to each other outside the side wall 3 of the outer groove, and after the inner side wall 3 is taken into the side wall 3 and formed into a ring shape, the inner groove side plates 7 arranged up and down are welded to each other. By performing the lateral connection of the plurality of inner groove side plates 7 outside the side wall 3 having a small restriction in the working space, the welding operation becomes easy, and the inner grooves can be assembled efficiently.

When the jack is jacked up as such, as shown in Fig. 11, the upper end of the jack jack 20 of the jack jacking device 19 protrudes further above the suspension frame 18. When the jack jack 20 is further raised, it will interfere with the overhanging scaffold 5 located directly above it. Then, during the period in which the inner-slot side plates 7 are welded to each other, the rod 20b that protrudes upward from the suspension stand 18 among the plurality of rods 20b constituting the jack-up lever 20 is detached from the lower side. The detached rod 20b is lowered by a suspension (davi) (not shown) provided in advance on the top of the jacking device for the jacking device 17, and is suspended by the hanging balance 21 shown in Fig. 8. Slot cover 14 on. The removal of the rod 20b is performed by the scaffold 17 using the jack jacking device. Further, the jacking device 17 is removed from the upper side of the scaffold 17 by the jacking jack 21 in such a manner that the scaffolding 17 does not interfere with the overhanging scaffold 5.

Next, the groove constituting member Y is raised by the jack ejector unit 19 by a substantially one layer of the inner groove side plate 7, and the inner groove side plate 7 of the lower layer is further moved into the space formed by the lower side of the inner groove side plate 7. Similarly to the mounting of the inner groove side plate 7 of the eighth layer (#8) described above, the inner groove side plate 7 of the seventh layer (#7) is attached as shown in Fig. 12 . At that time, the rod 20b protruding further above the suspension stand 18 is also unloaded, and is lowered onto the inner tank top cover 14 by the suspension balance 21.

The inner side panel 7 of the ninth layer (#9) to the seventh layer (#7) is attached in this manner, and then the overhanging eagle 5 on the inner peripheral side of the side wall 3 is removed as shown in Fig. 13. Normally, during the installation of the inner side groove 7 of the ninth layer (#9) to the seventh layer (#7), the side wall 3 of the outer groove is completed until the ninth layer (#9) which is the uppermost layer. Therefore, since the mold case or the like for forming the side wall 3 can be removed, the overhanging eagle 5 positioned on the inner peripheral side of the side wall 3 can be removed. In addition, the scaffold or the like on the outer peripheral side of the side wall 3 is not removed but remains in the subsequent step.

Next, since the jack jacking device 19 is repositioned, the second hanging frame 25 is placed on the top of the side wall 3 of the outer tub as shown in Fig. 13. Further, the tank constituting member Y (including the inner side groove side plate 7 of the eighth layer or the seventh layer) is temporarily lowered by the jack down to the tripod stand 6.

Next, the jacking up lever 20 of the jack jacking device 19 shown in Fig. 9 is temporarily removed from the suspended panel 10b of the joint support 10 by a suspension balance 21 or a crane or the like. Further, the jack body 20a of the jack jacking device 19 is detached from the suspension frame 18. Thereby, the jack jacking device 19 can be detached from between the side wall 3 of the outer tub and the joint plate 9. Further, the suspension stand 18 is detached from the side wall 3.

Then, the jack body 20a of the jack jacking device 19 is attached to the second suspension stand 25 shown in Fig. 13. Further, in the previous step, the upper portion of the jack jack 20 is temporarily removed without interfering with the overhanging eagle 5, and is lowered onto the inner tank top cover 14. However, since the jack jack 20 can be freely extended by removing the overhanging eagle 5 on the inner circumferential side of the side wall 3, the rod 20b dropped onto the inner tank top cover 14 is again mounted on the jack. The rod 20 extends the jack 20 from the jack. In the present embodiment, as shown in Fig. 13, in order to lower the jack jack 20 from the ninth layer (#9) which is the uppermost layer of the outer side wall 3 to the fifth layer (#5), further A preliminary rod 20b prepared in advance is added to adjust the jack jack 20 to a desired length.

Thus, the jack jack 20 is adjusted to a desired length, and then the lower end side of the jack jack 20 is again inserted into the slit 10d of the suspension plate 10b of the joint support 10. Then, the lower end portion of the jack jack 20 is fixed to the suspended panel 10b by the nut 19a. Thereby, the jack jacking device 19 is repositioned. Thus, the resetting of the jack jacking device 19 is completed, and then the jacking device 17 for the jack jacking device is removed as shown in Fig. 13.

Next, as shown in Fig. 14, the joint plate 9 is lifted by the jack jacking device 19, so that the groove forming member Y rises by substantially one layer of the inner groove side plate 7.

Next, the inner groove side plate 7 of the next layer is further carried into the space formed below the inner groove side plate 7, and is hereinafter described with the eighth groove (#8) and the seventh layer (#7) of the inner groove side plate 7 As in the installation, the inner side groove 7 of the sixth layer (#6) is attached as shown in Fig. 15.

Next, an outer tank top cover 26 is mounted on the inner tank top cover 14. In this step, as shown in Fig. 6, the outer tank top cover 26 is arranged in a radial shape from the central portion of the outer tank top cover 26 by the top cover bone 12, and an annular member (not shown) It is formed to be fixed between the top bones 12 arranged in a radial shape. A connecting material (not shown) made of a plurality of channels or the like is attached to the inner tank top cover 14, and the outer tank top cover 26 is attached to the connecting material. As shown in FIG. 5, since the canopy bone 12 is combined so that the joint supports 10 positions between the canopy bones 12 and 12, the jack jacking device 19 coupled to the joint support 10 is disposed on the canopy bone 12, 12 rooms. Thereby, the jack jacking device 19 is disposed so as not to interfere with the outer tank top cover 26, and operates in this state.

Moreover, the work of attaching the side bushing (not shown) to the inner peripheral surface of the side wall 3 of the outer tank is started. The side bushing is appropriately lifted from the side of the base plate 1 by using the traveling device 32 and the hoisting device 33 suspended from the cable car track 13 shown in Fig. 4, and the side bushings are sequentially attached to the outer groove. The inner peripheral surface of the side wall 3.

In addition, it is different from the lifting effect of the side bushing, but in the cable car track. 13 drape has an aerial tramway for inspection. After the inner-slot side plate 7 is welded, unlike the side wall bushing, the inspection air cable car is used to inspect or repair the weld line between the inner-slot side plates 7.

In the following, the rise of the groove constituting member Y by the jack ejector 19 and the movement of the inner groove side plate 7 of the lower layer to the lower side of the inner groove side plate 7 (the groove constituting member Y) and the inner groove after the loading are repeated. The side plate 7 is attached to the groove constituting member Y (the inner groove side plate 7), and the inner groove side plate 7 is attached to the first layer (#1) of the lowermost layer as shown in Fig. 16. Thereby, the side wall of the inner tank is completed.

In addition, when the groove side plate 7 is attached to each of the layers, that is, while the groove constituting member Y is lifted and the space is below, the various materials 27 are carried in differently from the loading of the inner groove side plate 7. On the base plate 1 in the side wall 3. Further, the work scaffolding 28 is previously assembled above the outer tank top cover 26. Further, the inspection or repair of the inner circumferential surface of the side wall 3 of the outer groove or the welding line between the inner groove side plates 7 is continued, and this is completed.

Next, the foot stand 6 is removed as shown in Fig. 17, and the square below the groove forming member Y becomes a space. Then, the groove constituting member Y is lowered by the jack by the jack jacking device 19, and the outer peripheral end of the top cover bone 12 of the outer tank top cover 26 is joined and fixed to the mounting end 29 as shown in Fig. 18, the mounting end The 29 series is embedded in the top inner peripheral surface of the side wall 3 of the outer tank.

Next, the connecting material (not shown) connecting the outer tank top cover 26 and the inner tank top cover 14 is removed, and the connection between them is released. With this, The outer trough top cover 26 can be retained at the mounting end 29 of the side wall 3 of the outer trough, and the trough forming member Y below the inner trough top cover 14 can be retained by the jack jacking device 19.

Next, as shown in Fig. 17, the groove forming member Y below the inner groove top cover 14 is lowered again by the jack by the jack jacking device 19, and the lower end portion of the lowermost layer of the inner groove side plate 7 is lowered to the ring portion 16. . Then, the lower end portion of the lowermost layer of the inner groove side plate 7 is attached to the inner groove anchor 2 provided on the base plate 1.

Next, as shown in Fig. 19, the traveling device 32 or the hoisting device 33 is detached from the cable car track 13. Next, the end portion of the joint support 10 on the joint plate 9 side is cut, whereby the joint support 10 is detached from the joint plate 9 and removed. Then, the joint support 10 is lifted by the jack jacking device 19, and the cable car rail 13, the attachment member 30, and the rail support 31 attached to the joint support 10 are lifted together with the joint support 10.

Further, the lifting of the joint support 10 by the jack jacking device 19 is continued, and the cable car track 13 is further raised. As shown in Fig. 20, the cable car track 13 is raised to a predetermined height, and thereafter, the rail support 31 to be mounted on the cable car track 13 is attached and fixed to the top cover of the outer tank top cover 26 as shown in Fig. 6. 12. Thereby, the reinstallation of the cable car track 13 is carried out. The mounting of the rail support 31 to the roof bone 12 is performed by welding or bolting or the like.

After the cable car track 13 is repositioned in this manner, the traveling device 32 or the hoisting device 33 is again mounted on the cable car track 13, and the aerial cable car is suspended from the hoisting device 33.

Next, the tension work of the side wall 3 of the outer tank is performed. Again, the pair has been completed The inner peripheral surface of the side portion 3 of the outer groove to which the side bushing is attached is sprayed with a gondola foam (PUF) as a heat-resistant and heat-resistant material toward the side bushing by the gondola. In addition, in some cases, the gondola cannot reach the uppermost end portion of the inner peripheral surface of the side wall 3 of the outer tank, and the air-lifting cable cannot be used for the blowing of the heat-resistant and tempering material.

In this case, after the jack lifting device 19 or the second suspension frame 25 or the like is removed from the portion where the cold heat absorbing material is not sprayed, the cold heat absorbing material is sprayed using a crane or the like.

Thereafter, as shown in Fig. 21, the jack jacking device 19, the second suspension rack 25, and the like are removed. Then, the work compartment 4 is closed, and a pump barrel (not shown) is provided, and the amount of water is filled to perform a withstand voltage and airtight test.

Finally, a cold-preserving material (not shown) such as perlite is filled between the inner tank and the outer tank to carry out the cold-keeping work between the inner and outer tanks. When the painting work and the piping cooling work are performed, the cylindrical groove 100 is completed.

When the cylindrical groove 100 thus constructed is constructed, since the cable car track 13 is attached to the joint support 10 in particular, the cable car track 13 can be raised by raising the joint support 10. By suspending the inspection gondola or the side bushing on the cable car track 13, the assembly process of the inner groove and the inspection of the weld line of the inner groove side plate 7 or the repair thereof can be simultaneously performed, and the side wall 3 of the outer groove can be attached. Set the side bushing.

Further, after the outer tank top cover 26 is fixed to the mounting end 29 of the side wall 3 of the outer tank, the joint support 10 is detached from the joint plate 9, and the joint support 10 is lifted by the jack jacking device 19, thereby Installed on The cable car track 13 of the joint support 10 is raised and the cable car track 13 is mounted to the roof bone 12 of the outer tank top cover 26. Therefore, since the height of the cable car track 13 can be lifted, the cable car track 13 can function as a cable car track for construction of a heat and cold tempering material.

Therefore, according to the method of constructing the cylindrical groove of the present embodiment, the jacking device 19 for assembling the inner groove is used to reposition the cable car track 13 which is required to be installed at different heights depending on the application. It can be set at a height suitable for the respective use. Since the cable car track 13 can be relocated at a low cost in a short time, the construction period can be shortened and the cost can be reduced.

Further, in the step of attaching the outer tank top cover 26 to the inner tank top cover 14, the outer tank top cover 26 is formed by combining the top cover bones 12. Since the joint support 10 is provided between the canopy bones 12, 12, a jack jacking device 19 is disposed between the cap bones 12, 12. In order to reposition the cable car track 13, the jack support 10 is lifted by the jack jacking device 19, and the cable car track 13 mounted to the joint support 10 is raised. At this time, the joint support 10 does not interfere with the outer tank top cover 26, but is suspended between the roof bones 12, 12 to the outer tank top cover 26. Thus, the cable car track 13 attached to the lower end portion of the joint support 10 can be easily attached to the roof bone 12.

Further, since the side wall 3 of the outer groove is formed to the topmost portion and the side bushing is attached to the inner circumferential surface of the side wall 3, a so-called bushing post-welding method is used. Therefore, a cable car track for bushing suspension is required. In the present embodiment, since the cable car track 13 is attached to the lower end portion of the joint support 10, not only the cable car track 13 but also the inner side plate 7 can be melted. The function of checking the wiring or the function of the repaired aerial cable car can also be used as a function of the bushing suspension.

Further, in the step of assembling the joint plate 9, the joint plate 9 is attached to the upper side of the inner groove side plate 7 which has been assembled in advance. First, the inner groove side plates 7 which are not bent in the height direction are assembled into an annular shape, and then the joint plate 9 is attached to the inner groove side plates 7, and the joint plates 9 which are bent toward the height direction are assembled into a ring shape at the beginning. It's still easier. Thus, the assembly of the joint plate 9 can be easily performed.

Further, in the step of attaching the inner groove side plate 7 to the lower side of the joint plate 9 and assembling the inner groove of the metal, it is possible to suspend the jack jacking device 19 on the suspension frame 18 and to form the groove with the jack. The processing of the member Y is performed, and the second suspension stand 25 is placed above the suspension stand 18 to reposition the jack jacking device 19, and in this state, the jack is used to lift the groove to constitute the member Y. Since the cable car track 13 is attached to the lower end of the joint support 10, the height of the cable car track 13 can be changed by reinstalling the jack jacking device 19. Thus, the work of using the cable car track 13 can be performed without any hindrance.

Further, especially when an earthquake or strong wind occurs during the period in which the groove constituting member Y is jacked up by the jack jacking device 19 or during the period in which the groove constituting member Y is suspended, there is an inner tank top cover 14 or an outer groove. The top cover 26 is likely to be displaced largely in the horizontal direction in the outer groove. However, since the space armature 11 disposed outside the joint support 10 (the side of the side wall 3 of the outer groove) is provided between the joint supports 10 and 10, the outer groove can be narrowed by the space armature 11. Between the side wall 3 and the joint plate 9 Substantial gap. Therefore, even if the joint plate 9 is displaced in the horizontal direction due to the influence of an earthquake or the like, the amount of displacement can be reduced. Thereby, the impact when the space armature 11 hits the side wall 3 of the outer groove can be alleviated, and the damage of the side wall 3 of the outer groove can be prevented. Further, it is possible to surely prevent damage between the jack jacking device 19 and the suspended panel 10b.

Although the preferred embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the embodiments described above. The various shapes, combinations, and the like of the respective constituent members shown in the above-described embodiments are merely examples, and various modifications can be made based on design requirements and the like without departing from the scope of the invention.

For example, the present invention is applied to a method of constructing a cylindrical groove which, after forming the side wall 3 of the outer groove to the middle in the above embodiment, passes through the joint plate 9 and uses the jack jacking device 19 to form the inner groove. The side plates 7 are lifted, and the inner side grooves 7 are sequentially installed on the lower side thereof to form inner grooves. However, the present invention can also be applied to a method of constructing a cylindrical groove having the following steps.

That is, the present invention can also be applied to a method of constructing a cylindrical groove having the following steps, the step of the construction method having: sequentially stacking the side walls of the outer groove from the lowermost layer toward the uppermost layer on the bottom of the outer groove During the period from above, at the top of the outer tank, and between the inner tank and the outer tank, the gantry is disposed on the side wall of the outer tank for supporting the jack jacking device; on the bottom of the outer tank The inner tank top cover and the outer tank top cover are assembled, and the inner groove side plates are sequentially installed on the inner tank top cover from the uppermost layer toward the lowermost layer, and the installed inner groove side plates are sequentially raised by the jack jacking device. step Step.

In the above construction method, the side bushing is formed when the side wall of the outer tank is constructed, and the side bushing is used as a mold box for forming the side wall of the outer tank. In this case, in order to inspect the repaired wire between the side plates of the inner tank or the repair thereof, it is necessary to inspect the cable car track for the overhanging of the gondola cable, and to suspend the cable car for the construction of the anti-cold heat absorbing material. The cable car track, and thus the invention becomes effective.

[Industrial Applicability]

According to the present invention, it is possible to provide a construction method of a cylindrical groove which can set the cable car track to a different height in a short time and at a low cost.

3‧‧‧Side sidewalls

7‧‧‧Inch side panel

9‧‧‧ joint plate (joint part)

10‧‧‧ Joint support (suspended member)

12‧‧‧Top bone

13‧‧‧ cable car track

14‧‧‧Inner tank top cover (slot top cover)

19‧‧‧ jack jacking device

20‧‧‧ jack jack

20a‧‧‧ jack body

25‧‧‧2nd suspension frame (2nd suspension section)

26‧‧‧ outer tank top cover

29‧‧‧Installation end

31‧‧‧Track support

Y‧‧‧ trough components

Claims (5)

A method for constructing a cylindrical groove, comprising a metal inner groove and a concrete outer groove, the construction method comprising: assembling a ring-shaped joint portion on the inner side of the outer groove; and setting the joint portion a plurality of suspended members coupled to the plurality of jack jacking devices; a step of installing the cable car tracks in the plurality of suspended members; and a plurality of jack jacking devices for suspending the plurality of jacks on the side walls of the outer slots a plurality of steps of suspending; a step of mounting a plurality of jack jacking devices between said plurality of suspension portions of said side wall of said outer groove and said plurality of suspended members of said joint portion; The step of lifting and raising the joint portion by the plurality of jack jacking devices, and attaching the inner groove side plate to the lower side of the raised joint portion to assemble the inner groove; and assembling the inner groove Having: a step of installing an inner groove top cover on the joint portion; and a step of installing an outer groove top cover on the inner groove top cover; after the step of assembling the inner groove Performing the step of fixing the outer tank top cover to the side wall of the outer tank; after the step of fixing the outer tank top cover to the side wall of the outer tank, the following steps are performed: the plurality of suspended members are Removed from the joint portion, and the plurality of suspended members are lifted by the plurality of jack lifting devices to be installed in the foregoing A plurality of the cable car tracks of the suspended members are raised to mount the cable car track to the outer tank top cover. The method for constructing a cylindrical groove according to claim 1, wherein the step of installing the outer groove top cover on the inner groove top cover forms the outer groove by combining a plurality of top cover bones a top cover, and the plurality of jack jacking devices are disposed between the plurality of top cover bones. The method for constructing a cylindrical groove according to the first or second aspect of the invention, wherein the side wall of the outer groove is formed to the topmost portion, and the side surface is attached to the inner circumferential surface of the side wall. The step of the bushing. The method for constructing a cylindrical groove according to any one of claims 1 to 3, wherein in the step of assembling the joint portion, the groove is formed in an annular groove which is assembled in advance. The joint portion is attached to the upper side of the side plate to assemble the joint portion; and in the step of assembling the inner groove, the inner groove side plate on the lower side of the joint portion that is raised by the plurality of jack jacking devices is attached. An inner groove side panel. The method for constructing a cylindrical groove according to any one of claims 1 to 4, wherein in the step of assembling the inner groove, an inner groove side plate is attached to a lower side of the joint portion. The treatment is performed between the process of attaching the other inner groove side plate to the lower side of the inner groove side plate, and the process of providing a plurality of the plurality of suspension portions above the plurality of suspension portions of the side wall of the outer groove 2 hanging a plurality of jack jacking devices respectively repositioned between the second suspension portion and the plurality of suspended members, and the joint portion is further lifted upward by the plurality of jack jacking devices And make it rise.