JPH0894785A - Assembling method of huge tubular structure and roof with suspension balance mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] When assembling large tubular structures such as tanks and containment vessels, it is possible to perform assembly work without being affected by weather conditions and to significantly shorten the construction period. A method for assembling a huge structure and a roof with a suspension balance mechanism. [Structure] A roof body 10 with a suspension balance mechanism of the present invention, which has a suspension balance function and a roof function, is provided with body blocks 40, 42,
Assembly site 48 for manufacturing 44 and top head block 46
Used as the roof of the torso block 40, 4 at the assembly site 48
After sequentially manufacturing 2, 44 and the top head block 46, the roof body 10 with the suspension balance mechanism is used as it is as a suspension balance, and the respective trunk blocks 40, 42, 44 and the top head block 46 are constructed into the reactor containment vessel 38. I decided to hang it on site and install it.

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 tubular huge structure and a roof with a suspension balance mechanism, and more particularly to a method for assembling a tubular huge structure such as a tank or a reactor 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 reactor containment vessel is used to prevent nuclear fission material from leaking to the outside, and is usually a huge steel tubular structure having a height of about 50 m and a diameter of about 30 m. Is. Conventionally, in the assembly work of such a tubular huge structure, a side wall plate and a roof plate manufactured to a certain size are transported to a construction site in a factory. Then, at a construction site, a tower crane is used to assemble and weld the side wall plates while hoisting them to construct a tubular structure having a predetermined height, and similarly a roof plate is assembled on the tubular structure.

[0003]

However, in the conventional method of assembling the tubular huge structure, all the work is performed outdoors, so that the work must 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 that a huge tent that can cover the entire tubular huge structure be built in advance and that the assembly work be performed therein. However, this method has a drawback that the construction period for constructing a tent covering a cylindrical huge structure with a height of 50 m and a diameter of about 30 m is long, and on the contrary the whole construction period is long, and the cost of the huge tent itself is high. However, there is a drawback that the equipment cost is increased and the equipment cost is increased, and it is not a fundamental solution after all.

The present invention has been made in view of the above circumstances, and in assembling a large tubular structure such as a tank or a reactor containment vessel, the assembling work can be performed without being affected by weather conditions. The purpose is to provide a method for assembling a tubular huge structure and a roof with a suspension balance mechanism that can significantly shorten the construction period.

[0005]

In order to achieve the above-mentioned object, the present invention pre-designs a cylindrical huge structure into a plurality of stages of blocks and arranges it near the construction site where the cylindrical huge structure is constructed. , Temporarily constructing an assembly site having a detachable roof in which a suspension balance mechanism is incorporated, then, in the assembly site, a first-stage block of each block is produced, and then the roof of the assembly site is suspended as it is. Used as a balance, the prepared first-stage block is hung and installed on the construction site by a crane separately provided via the roof suspension balance mechanism, and then the roof is used as a roof of the assembly site. It is characterized in that the blocks that have been designed in sections are sequentially stacked by returning the blocks again and repeating the operations from the production of the blocks to the returning of the roof.

Further, in order to achieve the above object, the present invention provides:
A roof body composed of a plurality of long members that are radially arranged to form a roof frame and serve as a balance bar of a hanging balance mechanism, and a sheet member that covers the roof skeleton, and the vicinity of the tips of the plurality of long members. And a hanging device for a crane that is connected to a separately installed crane via a wire, and a suspended object that is provided in the vicinity of the tip ends of the plurality of frame members and that is connected to a suspended object via a wire. And a hanging device for objects,
It is characterized in that the hanging object is hung at multiple points by the crane through the roof body.

[0007]

According to the first aspect of the present invention, the cylindrical huge structure is divided into a plurality of blocks in advance at the design stage. Then, in the vicinity of a construction site where a huge tubular structure is constructed, an assembly site with a detachable roof body incorporating a suspension balance mechanism as a roof is temporarily installed.
After the stage block is manufactured, the first stage block is hung and installed on the construction site by a crane separately provided through the roof suspension balance mechanism. After installing the first block, the roof will be restored again as the roof of the assembly hall. The cylindrical huge structure is completed by performing the above-mentioned work by the number of blocks that are divided and designed and sequentially stacking the blocks. As a result, block assembly work can be performed at the assembly site without being affected by weather conditions, and the block assembled at the assembly site can be easily and quickly used by using the roof of the assembly site as a hanging balance. It can be hung and installed at the construction site where a huge structure is constructed.

According to the second aspect of the invention, the roof body is provided with the function of a suspension balance in addition to the function as an 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 a block of a tubular huge structure, the roof is used as a suspension balance, and the produced block is directly used by a crane to form a tubular giant structure. Can be suspended at the construction site to be built. Further, since the long members are arranged radially so that the roof body can be hung at multiple points, it is possible to hang the block without flattening it and maintaining a good hanging balance.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a method for assembling a cylindrical huge structure and a suspension balance for assembling according to the present invention will be described in detail below with reference to the accompanying drawings. Roof body 1 with hanging balance mechanism of the present invention
No. 0 is configured to have 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 FIG. 1 and FIG. 2, in the roof body 10 with a suspension balance mechanism, a large number of vertical trusses 14, 14 ... It serves as a balance bar when hanging the suspended object 16 in a multi-point shape (suspending a plurality of points on the upper edge of the suspended object 16). Further, the vertical trusses 14 are joined to each other via the auxiliary beams 18, the tips of the vertical trusses 14 are joined to each other via the horizontal beams 20, and further, the ring truss 12 having a ring shape has a cross shape inside. Cross beam 2
Two are provided. As a result, a strong polygonal frame having a balance function is formed. In addition, in the vicinity of the tips of the many vertical trusses 14, suspension rods 24, 24 movable along the longitudinal direction of the vertical trusses 14 by a predetermined distance.
... are provided in the vertical direction. A lifting shackle 24A is attached to the upper end of the hanging rod 24, and a hanging shackle 2 is attached to the lower end of the hanging rod 24.
4B is attached.

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

Next, the method of assembling the tubular huge structure of the present invention using the roof 10 with the suspension balance mechanism constructed as described above will be described by taking the assembling of the reactor containment vessel as an example. At the design stage, the reactor containment vessel 38 is divided into a plurality of stages of tubular body blocks 40, 42, 44 and a top head block 46 in advance. Then, as shown in FIG. 3, an assembly site 48 having the above-described roof body 10 with a lifting balance mechanism of the present invention as a roof is temporarily installed near the construction site where the reactor containment vessel is constructed. That is, a support member 50 such as a plurality of columns or wall materials is erected so as to form an indoor space on the base, and the roof body 10 with a hanging balance mechanism is erected on the support member 50 to form a roof.
At this time, the roof 10 with the hanging balance mechanism is detachably fixed to the support member 50 so that it can be easily attached or detached. Then, in the assembly site 48, first, the first stage trunk block 40 is manufactured. By the way, as shown in FIG. 4, the body 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. It is supported by the reinforcing members 52, 52 ... In addition, assembly site 4
During the work in 8, the ventilator of the roof body 10 with a lifting balance mechanism discharges the welding fumes such as welding work, and the hoist crane is used for lifting the liner plate 54 when assembling the body blocks 40, 42, 44. 36.

Next, after the first-stage trunk block 40 is manufactured in the assembly site 48, the shackle 2 for suspending the plurality of suspension rods 24 provided on the roof body 10 with the suspension balance mechanism is provided.
A suspending member (not shown) formed on the upper peripheral portion of the trunk block 40 is connected to 4B via a wire 56. On the other hand, the hook 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 suspension shackle 24B and the suspension portion of the torso block 40 is vertically stretched,
The position of the suspension rod 24 is changed according to the diameter (D) of the trunk block 40. As a result, when the trunk block 40 is lifted by the crane, only a vertical force is applied to the trunk block 40, so that the cylindrical trunk block 40 can be hung so as not to generate a horizontal component force for flattening it. it can. Further, when all the 16 suspension rods 24 shown in FIG. 2 are used, 16-point multi-point suspension is performed, but normally, the suspension rods 24 are used every other stage to perform 8-point multi-point suspension. Then, the support member 50 of the assembling place 48 and the roof 10 with the hanging balance mechanism are unfixed, and the trunk block 40 is hung and installed on the construction site via the roof 10 with the balance mechanism. At this time, since the roof body 10 with the balance mechanism prevents rain and the like during the installation work, the installation work can be performed even in the rain.

Next, when the installation of the first-stage trunk block 40 is completed, the roof mechanism-equipped roof body 10 and the first-stage trunk block 40 are disconnected, and the balance mechanism-equipped roof body 1 is disconnected.
0 is restored again as the roof of the assembly site 48. continue,
After the second-stage trunk block 42, the third-stage trunk block 44, and the top head block 46 are sequentially manufactured at the assembly site 48, the respective trunk blocks 42, 44 and the top head block 46 are provided with the hanging balance mechanism as described above. It is hung on the construction site through the roof body 10 by a tower crane, and is installed so as to be sequentially stacked on the first-stage trunk block 40. The body blocks 40, 42, 44 and the body block 44 and the top head block 46 are generally joined by welding.

As described above, according to the method for assembling the tubular huge structure of the present invention, the roof body 10 with the hanging balance mechanism of the present invention, which has the hanging balance function and the roof function, is attached to the body block 4.
0, 42, 44 and the top head block 46 are used as a roof of an assembly site 48, and the trunk blocks 40, 42, 44 and the top head block 46 are sequentially manufactured at the assembly site 48. Is used as it is as a hanging balance, and each body block 40, 42, 44
The top head block 46 is hung and installed on the construction site of the reactor containment vessel 38. As a result, the torso block 4 is not affected by weather conditions at the assembly site 48.
0, 42, 44 and the top head block 46 can be assembled, and the assembled blocks 4
0, 42, 44, 46 can use the roof body 10 with the hanging balance mechanism, which is the roof of the assembly site 48, as it is as a hanging balance. Therefore, each block 40, 42, 44, 4
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 parts are assembled into the parts 42, 44, and 46, the work at high places can be reduced and the work safety can be improved as compared with the case where all the reactor containment vessels are assembled at the construction site. In addition, the suspension rod 24 of the roof body 10 with a suspension balance mechanism of the present invention includes the body blocks 40, 4
Since it can be moved according to the diameter of 2, 44, special curing for flattening of the body blocks 40, 42, 44 such as provision of a cross beam in the body blocks 40, 42, 44 is not necessary. Further, the roof body 10 with a suspension balance mechanism of the present invention is provided with a vertical truss 1 in a radial manner so that it can be suspended at multiple points.
Since 4, 14, ... Are arranged, it is possible to hang while maintaining a good hanging balance.

The roof 10 with a hanging balance mechanism is shown in FIG.
As shown in FIG. 5, it can also be used as a roof of a temporary scaffold 64 constructed when performing various operations such as incidental equipment, inspection, painting, heat retention, and internal work of the installed reactor containment vessel 38. As a result, each work can be performed without being affected by weather conditions. Further, in this embodiment,
Although the method of assembling the reactor containment vessel 38 has been described as an example, the invention is not limited to the reactor containment vessel 38 and can be applied to all tubular large structures such as tanks. Also,
Although the shape of the roof body 10 with the balance mechanism is polygonal, the shape is not limited to this.

[0017]

As described above, according to the method for assembling the tubular huge structure of the present invention, the roof body with the hanging balance mechanism of the present invention having the hanging balance function and the roof function is provided in the tubular huge structure. It is used as a roof of an assembly site where each block is designed separately, and after each block is created at the assembly site, the roof with a suspension balance mechanism is used as it is as a suspension balance, and each block is constructed with a separate crane. I decided to hang it up and install it.

As a result, the assembling work of each block can be performed at the assembling site without being affected by the weather conditions, and the assembled block is the roof of the assembling site with the hanging balance mechanism as it is. As a result, each block can be easily and quickly suspended and installed in the construction site. Therefore, the work period can be significantly shortened.

Also, compared to assembling all at the construction site,
Work at high places can be significantly reduced, and work safety can be improved.

[Brief description of drawings]

FIG. 1 is a cut sectional view illustrating a 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 suspension balance mechanism.

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

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

FIG. 5 shows a roof body with a suspension balance mechanism of the present invention,
Explanatory diagram when used as a roof for temporary scaffolding for painting assembled tubular huge structure etc.

[Explanation of symbols]

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

Claims (3)

[Claims] 1. A set having a detachable roof in which a suspension balance mechanism is incorporated in the vicinity of a construction site where the tubular huge structure is constructed by preliminarily designing the tubular huge structure into blocks of a plurality of stages. The stand is temporarily installed, then, the first-stage block of each block is produced in the assembly site, and then the roof of the assembly site is used as it is as a suspension balance to produce the first-stage block produced. The roof is suspended and installed on the construction site by a crane separately installed via the suspension balance mechanism, and then the roof is restored again as the roof of the assembly site, from the production of the block to the restoration of the roof. A method for assembling a cylindrical huge structure, characterized in that the blocks that have been separately designed are sequentially stacked by repeating the work. 2. A roof body composed of a plurality of long members that are radially arranged to form a roof frame and serve as balance bars of a hanging balance mechanism, and a roof member that includes a sheet member that covers the roof skeleton, and the plurality of long members. A crane suspender that is provided near the tip of the member and is connected to a separately installed crane via a wire, and is provided near the tip of the plurality of elongated members, and the wire is attached to the suspended object via a wire. A hanging object for hanging object to be connected, wherein the hanging object is hung at multiple points by the crane through the roof object. 3. The roof body with a lifting balance mechanism according to claim 2, further comprising a lifting machine provided below the roof body, the lifting machine being capable of moving an annularly arranged rail.