JP2907264B2 - Method of assembling cylindrical huge structure and roof with hanging balance mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a huge cylindrical structure and a roof with a hanging balance mechanism, and more particularly to a method for assembling a huge cylindrical structure such as a tank or a containment vessel, and its use. The present invention relates to a roof body with a hanging balance mechanism.

[0002]

2. Description of the Related Art For example, a containment vessel for preventing fissionable material from leaking to the outside, is usually a huge steel tubular structure having a height of about 50 m and a diameter of about 30 m. It is. Conventionally, in assembling such a huge tubular structure, a side wall plate or a roof plate manufactured to a certain size is transported to a construction site in a factory. Then, at a construction site, a side wall plate is lifted and assembled and welded using a tower crane to construct a tubular structure having a predetermined height, and a roof plate is similarly assembled on the tubular structure.

[0003]

However, the conventional method of assembling a huge tubular structure is entirely an outdoor operation, so that the operation has to be interrupted due to weather conditions such as rainfall and snowfall. In many cases, there was a drawback that the construction period was significantly delayed. For this reason, it has been proposed to construct a huge tent capable of covering the entire cylindrical huge structure in advance, and to perform assembling work therein. However, this method requires a period of time to construct a tent that covers a huge cylindrical structure having a height of 50 m and a diameter of about 30 m, which has a disadvantage that the entire period of construction is rather long, and the cost of the huge tent itself is increased. However, there is a disadvantage that the equipment cost is increased, and ultimately, it is not a fundamental solution.

The present invention has been made in view of such circumstances, and in assembling a huge cylindrical structure such as a tank or a containment vessel, it is possible to perform an assembly work without being affected by weather conditions. It is an object of the present invention to provide a method for assembling a large tubular structure and a roof with a hanging balance mechanism, which can greatly shorten the construction period.

[0005]

According to the present invention, in order to achieve the above object, a large tubular structure is divided and designed in advance into a plurality of blocks, and at the construction site where the huge tubular structure is constructed. A temporary assembling site having a detachable roof in which a hanging balance mechanism is incorporated is temporarily provided. Next, the first block of each of the blocks is manufactured in the assembling site, and then the roof of the assembling site is suspended as it is. Using as a balance, the prepared first-stage block is suspended and installed on the construction site by a separate crane via the roof suspension balance mechanism, and then the roof is used as the roof of the assembly site. The method is characterized in that the blocks from the production of the blocks to the return of the roof are repeated again, so that the blocks that have been separately designed are sequentially stacked.

[0006] In order to achieve the above object, the present invention provides:
A plurality of long members that are radially arranged to form a roof frame and serve as a balance rod of a hanging balance mechanism, and a roof body including a sheet member that covers the roof skeleton, and a vicinity of the tip of the plurality of long members. And a crane suspender connected to a separate crane via a wire, and a suspended object provided near the tip of the plurality of frame members and connected to the suspended object via a wire. And a hanging device for goods,
The suspended object is suspended at multiple points by the crane via the roof.

[0007]

According to the first aspect of the present invention, at the design stage, the huge tubular structure is divided into a plurality of blocks in advance. Then, an assembling site having a detachable roof body with a built-in hanging balance mechanism as a roof is temporarily installed near the construction site for constructing the huge tubular structure.
After the first-stage block is produced, the first-stage block is suspended and installed at the construction site by a separate crane via the hanging balance mechanism of the roof. After the first stage block is installed, return the roof to the roof of the assembly site again. The above operation is performed for the number of blocks designed as described above, and the blocks are sequentially stacked to complete a huge tubular structure. This makes it possible to assemble the blocks at the assembling site without being affected by the weather conditions. Moreover, by using the roof of the assembling site as a hanging balance, the blocks assembled at the assembling site can be easily and quickly turned into tubes. It can be hung and installed at a construction site where a large girder structure is constructed.

According to the invention of claim 2, the roof body has a function of a hanging balance in addition to the function of the original roof for preventing rain and the like. Thus, if this roof body is used, for example, as a roof of an assembly site for producing blocks of a huge cylindrical structure, the roof is used as a hanging balance, and the produced block is directly converted into a huge cylindrical structure with a crane. It can be hung at the construction site to be constructed. In addition, since the roof body is provided with the long members radially so as to be able to be hung at multiple points, the blocks can be hung without flattening and maintaining a good hanging balance.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a method for assembling a huge tubular structure and a hanging balance for assembling according to the present invention will be described below in detail with reference to the accompanying drawings. Roof 1 with hanging balance mechanism of the present invention
Numeral 0 designates a structure having both a hanging balance function and a roof function. FIG. 1 is a cut side view and FIG. 2 is a top view. As shown in FIGS. 1 and 2, a roof body 10 with a suspension balance mechanism has a large number of vertical trusses 14, 14... It is a balance rod when the object 16 to be hung in a multi-point manner is hung at a plurality of points (at multiple positions on the upper edge of the object 16 to be hung). Further, the vertical trusses 14 are joined via the auxiliary beams 18, and the distal end portions of the vertical trusses 14 are joined via the horizontal beams 20, and furthermore, the inside of the ring-shaped ring truss 12 has a cross shape. Cross beam 2
2 are provided. As a result, a strong polygonal skeleton having a balance function is formed. In addition, suspension rods 24, 24 movable by a predetermined distance along the longitudinal direction of the vertical truss 14 are provided near the distal ends of the multiple vertical trusses 14.
Are provided in the vertical direction. A lifting shackle 24A is attached to the upper end of the suspension rod 24, and a suspension shackle 2
4B is attached.

Next, the structure of the roof body 10 with the hanging balance mechanism as a roof function will be described.
Inside, a central rain curing roof 26 is provided,
A ventilator 28 is attached to the central rain curing roof 26. In addition, the transparent sheet 30 is covered on the framework formed in a polygonal shape in consideration of lighting. A snow-melting pipe 32 is provided along the outer periphery of the central rain-curing roof 26 near the central rain-curing roof 26 of the roof body 10 with a hanging balance mechanism, and the snow-melting pipe 32 is connected to a water supply pipe (not shown). Water for melting snow is blown out from a number of holes formed in the snow melting pipe 32. Although not shown, the roof 10 with the hanging balance mechanism is provided with lighting equipment. Also,
An annular rail 34 is disposed below the outer periphery of the roof body 10 with the suspension balance mechanism and inside the position where the suspension rod 24 is disposed, and the hoist crane 3 is mounted on the rail 34.
6 is movably suspended.

Next, a method of assembling a huge tubular structure according to the present invention using the roof 10 having the hanging balance mechanism configured as described above will be described by assembling a reactor containment vessel as an example. At the design stage, the reactor containment vessel 38 is divided into a plurality of tubular trunk blocks 40, 42, 44 and a top head block 46 in advance. Then, as shown in FIG. 3, an assembling site 48 having the above-described roof body 10 with a hanging balance mechanism of the present invention as a roof is temporarily provided near the construction site where the containment vessel is to be constructed. That is, a plurality of support members 50 such as columns or wall materials are erected to form an indoor space on the base, and a roof body 10 with a hanging balance mechanism is erected thereon to form a roof.
At this time, the roof body 10 with the hanging balance mechanism is detachably fixed to the support member 50 so that the roof body 10 can be easily attached or detached. Then, in the assembly place 48, first, the first-stage trunk block 40 is manufactured. Incidentally, as shown in FIG. 4, the torso blocks 40, 42, 44 are formed in a cylindrical shape by a plurality of stages of liners 51, 51 formed by a large number of plate plates 54, 54, and each liner 51 is temporarily installed. Are supported by the reinforcing members 52, 52. In addition, assembly site 4
During the operation in the interior 8, the welding fumes such as the welding operation are discharged by the ventilator of the roof body 10 having the hanging balance mechanism, and the lifting of the liner plate 54 when assembling the trunk blocks 40, 42, 44 is performed by the hoist crane. 36.

Next, when the first-stage trunk block 40 is manufactured in the assembly place 48, the shackle 2 for suspending the plurality of suspension rods 24 provided on the roof 10 with the suspension balance mechanism is provided.
A suspending member (not shown) formed on the peripheral edge of the upper end of the trunk block 40 is connected to the 4B via a wire 56. On the other hand, the lifting shackle 24A of the suspension rod 24 is connected via a wire 58 to a hook 62 at the tip of a wire 60 of a tower crane (not shown). At this time, the wire 56 connected to the hanging shackle 24B and the hanging portion of the trunk block 40 is stretched vertically.
The position of the suspension rod 24 is changed according to the diameter (D) of the trunk block 40. Thus, when the torso block 40 is lifted by the crane, only a vertical force is applied to the torso block 40. Therefore, it is possible to suspend the torso so as not to generate a horizontal component force that flattens the cylindrical torso block 40. it can. In addition, when all the 16 hanging rods 24 shown in FIG. 2 are used, 16 points of multi-point hanging are obtained. Usually, however, the hanging rods 24 are alternately used and 8 points of multi-point hanging are performed. Then, the fixing between the support member 50 of the assembly site 48 and the roof 10 with the hanging balance mechanism is released, and the trunk block 40 is hung to the construction site via the roof 10 with the balance mechanism and installed. At this time, during the installation work, since the roof body 10 with the balance mechanism prevents rain or the like, the installation work can be performed even in rainy weather.

Next, when the installation of the first-stage trunk block 40 is completed, the connection between the roof unit 10 with the balance mechanism and the first-stage trunk block 40 is disconnected, and the roof unit 1 with the balance mechanism is removed.
0 is returned as the roof of the assembly site 48 again. continue,
When the second-stage torso block 42, the third-stage torso block 44, and the top head block 46 are sequentially manufactured at the assembling site 48, each of the torso blocks 42, 44 and the top head block 46 is provided with a hanging balance mechanism as described above. It is suspended by a tower crane via the roof body 10 at a construction site, and is sequentially stacked on the first-stage trunk block 40 for installation. In addition, each of the body blocks 40, 42, 44 and the connection between the body block 44 and the top head block 46 are generally performed by welding.

As described above, according to the method for assembling a huge tubular structure according to the present invention, the roof 10 with the hanging balance mechanism of the present invention having the hanging balance function and the roof function is attached to the trunk block 4.
0, 42, 44 and the top head block 46 are used as a roof of an assembling yard 48, and the torso blocks 40, 42, 44 and the top head block 46 are sequentially manufactured at the assembling yard 48. Is used as a hanging balance as it is, and each of the trunk blocks 40, 42, 44
And the top head block 46 are suspended from the construction site of the reactor containment vessel 38 and installed. As a result, the torso block 4 is not affected by the weather
0, 42, 44 and the top head block 46 can be assembled.
In the blocks 0, 42, 44, and 46, the blocks 40, 42, 44, and 4 can be used as-is as the hanging balance with the hanging balance mechanism, which is the roof of the assembly site 48.
6 can be easily and quickly suspended and installed at the construction site. Therefore, the work period can be significantly shortened.

Further, each block 40 of the reactor containment vessel,
Since the reactors are assembled separately into 42, 44, and 46, work at a high place can be reduced and safety of the work can be improved as compared with a case where all the reactor containment vessels are assembled at the construction site. Further, the suspension rod 24 of the roof 10 with the suspension balance mechanism of the present invention is
Since it is made possible to move according to the diameters of the trunk blocks 40, 42, and 44, it is not necessary to specially cure the flattening of the trunk blocks 40, 42, and 44, such as temporarily installing a cross beam in the trunk blocks 40, 42, and 44. In addition, the roof 10 with the suspension balance mechanism of the present invention is provided with a vertical truss 1 so that it can be suspended at multiple points.
Since four, fourteen,... Are provided, the suspension can be performed while maintaining a good suspension balance.

The roof 10 with the hanging balance mechanism is shown in FIG.
As shown in (1), it can also be used as a roof of a temporary scaffold 64 constructed when performing various operations such as ancillary facilities, inspection, coating, heat insulation, internal work, etc. of the installed reactor containment vessel 38. Thereby, each of the above operations can be performed without being affected by weather conditions. In this embodiment,
Although described in the example of the method of assembling the reactor containment vessel 38, the present invention is not limited to the reactor containment vessel 38, but can be applied to all cylindrical large structures such as tanks. Also,
Although the shape of the roof body 10 with the balance mechanism is polygonal, it is not limited to this shape.

[0017]

As described above, according to the method for assembling a huge tubular structure according to the present invention, the roof with the hanging balance mechanism having the hanging balance function and the roof function according to the present invention is provided with a cylindrical huge structure. Used as the roof of an assembly site to produce each block that separately designed the structure.After each block was produced at the assembly site, each block was constructed with a separate crane using the roof with the suspension balance mechanism as it was as the suspension balance. And installed it.

This makes it possible to assemble each block at the assembling site without being affected by weather conditions, and to assemble each of the assembled blocks on the roof of the assembling site as a roof with a hanging balance mechanism. Therefore, each block can be easily and quickly suspended and installed on a construction site. Therefore, the work period can be significantly shortened.

Also, compared to assembling all at the construction site,
Work at height can be greatly reduced, and work safety can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating the structure of a roof body with a hanging balance mechanism according to the present invention.

FIG. 2 is a top view of a roof body with a hanging balance mechanism.

FIG. 3 is an explanatory view illustrating a method for assembling a huge tubular structure according to the present invention.

FIG. 4 is a perspective view illustrating a torso block;

FIG. 5 is a view showing a roof body with a hanging balance mechanism according to the present invention;
Explanatory drawing when used as a roof of a temporary scaffold for painting an assembled huge tubular structure

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Roof body with suspension balance mechanism 12 ... Ring truss 14 ... Vertical truss 16 ... Lifted object (for example, trunk block of a reactor containment vessel) 18 ... Auxiliary beam 20 ... Horizontal beam 24 ... Hanging rod 26 ... Central rain curing Roof 28 Ventilator 30 Transparent sheet 32 Snow melting pipe 34 Ring rail 36 Hoist crane 38 Reactor containment vessel 40, 42, 44 Trunk block 46 Roof block 48 Assembly place 56, 58 Wire 60 Tower Crane wire 62 ... hook

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields investigated (Int. Cl. ⁶ , DB name) G21C 13/00 E04G 21/14 E04G 21/28 E04H 7/18

Claims (3)

(57) [Claims] 1. A set having a detachable roof in which a hanging balance mechanism is incorporated in the vicinity of a construction site for constructing said huge tubular structure, wherein said huge tubular structure is separately designed into a plurality of blocks in advance. Temporarily establish a position, Next, the first stage block of each of the blocks is manufactured in the assembly site, Next, using the roof of the assembly site as a hanging balance, the manufactured first stage block, The roof is suspended and installed on the construction site by a separate crane via the hanging balance mechanism, and then the roof is returned again as the roof of the assembly site, from the production of the block to the return of the roof. A method for assembling a huge tubular structure, characterized by sequentially stacking each of the separately designed blocks by repeating operations. 2. A roof body comprising a plurality of long members radially arranged to form a roof frame, serving as a balance rod of a hanging balance mechanism, and a sheet member covering the roof frame, and the plurality of long members. A crane suspending device provided near the tip of the member and connected to a separate crane via a wire, and provided near the tip of the plurality of long members and connected to the suspended object via the wire And a hanging member for a suspended object to be connected, wherein the suspended object is suspended at multiple points by the crane via the roof body. 3. A roof body with a hanging balance mechanism according to claim 2, further comprising a hoist capable of moving rails arranged annularly on a lower side of said roof body.