JP4316161B2 - Power plant construction method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for constructing a power plant building including a steel concrete structure, and in particular, an improvement of a power plant construction method in which a module structure in which steel frame materials and indoor equipment are integrated is applied to a steel concrete structure part. About.
[0002]
[Prior art]
Conventionally, a building of a nuclear power plant, for example, a reactor building or a turbine building has a reinforced concrete structure or a steel reinforced concrete structure with a built-in or temporary steel frame. When building a building with such a conventional structure, for example, after installing a permanent or temporary steel frame, perform reinforcement and formwork, or place concrete after direct reinforcement and formwork. Then, building work is proceeding from the lowest floor to the upper floor in the order of the floor, wall, and ceiling of the building in a process such as removing the formwork after the predetermined concrete strength is obtained.
[0003]
In addition, once the concrete has been placed on the floors, pillars, walls, etc. of the construction work, once the required concrete strength has been obtained, the area is once handed over to the machine electrical side, and the piping, equipment, and support structure installed in the building Construction of equipment in the building that constitutes a plant for things, etc. will be carried out. In the handed over area, after the mechanical and electrical side performs first-in carry-in of components such as equipment, piping operation racks or prefabricated structures, the area is handed over again to the building side for ceiling work. The construction side installs a deck receiving beam and deck plate on the ceiling and places ceiling concrete. Then, when the required strength of concrete is obtained, the area is handed over again to the machine electric side, and the machine electric side performs installation of equipment, piping, operation stand, support structure and the like.
[0004]
For the installation of the operation stand and the support structure for the mechanical / electric work, the building is joined to the building member by using the embedded hardware previously embedded in the floor, pillar, beam, wall, ceiling, or the like. FIG. 9 illustrates a conventional construction method. As shown in FIG. 9, the steel column 2 is mounted on the building foundation 1 or the like, and the steel beam 3 is connected to the steel column 2. Reinforcing bars 4 are disposed around the steel column 2 and the steel beam 3, and concrete 5 is placed therein. In such a steel-framed reinforced concrete building structure, a plurality of bowl-shaped support members 6 are arranged inside and outside, and the building members 7 such as pipes are supported by the support members 6. The end portions of the support members 6 are embedded and supported in the concrete 5 via the embedded metal 8.
[0005]
For such a configuration, conventionally, the concrete placement of the building has been completed, and in the completed building or area after the formwork removal, the inner surface of the formwork is in contact with the pillar, beams (ceiling), floor concrete, etc., and the surface is the concrete surface The supporting member 6 was connected to the embedded metal fixture 8 so as to appear in Fig. 1, and the building equipment 7 for plant configuration was installed. The machine electric side started construction after receiving the completed building or area delivery.
[0006]
Therefore, in the conventional nuclear power plant construction method, the construction work in the same area is carried out alternately by the construction work and the mechanical work, which leads to the construction period becoming redundant.
[0007]
Under these conventional methods, the construction period can be shortened by adopting a large-scale temporary lifting machine, etc. to increase the size of building components such as prefabricated reinforcing bars and prefabricated steel frames in construction work. This has been dealt with by reducing the amount of construction work. Similarly, in electromechanical construction, the installation members have been increased in size by increasing the length of the piping and prefabricating the piping and the support member as one body, thereby reducing the amount of construction work at the installation location.
[0008]
In recent planning plants, the demand for shortening the construction period has been increasing, and the development of new construction methods has become necessary. As a method for solving such a requirement and further shortening the construction period, a module method for integrating a building member and a plant component device is known (Japanese Patent Laid-Open No. 10-266602). According to this method, steel pillars, ceiling beams installed in the construction site of the plant building, indoor equipment installed in the construction site, and wall materials on the side walls of the construction site are integrated into a modular structure. The construction time is shortened by adopting a method of transporting and installing this module structure to the site after assembly at the factory.
[0009]
[Problems to be solved by the invention]
However, in the construction method using the conventional module structure described above, when considering a large-scale module construction method for a power plant with the aim of shortening the construction period, there is a lack of strength due to the wall material compared to the size, and the wall surface Since the steel plate thickness of the material is thin, the load supported by the wall surface is small, and it is considered difficult to attach a heavy load equipment or support structure as a module structure in advance using the wall surface.
[0010]
Moreover, since the wall surface is used as a module component in advance, the application is limited, and it is difficult to easily cope with changes in column arrangement and the like.
[0011]
Furthermore, because it is a configuration that supports equipment in the building only in the ceiling, only a limited range of equipment installed on the ceiling, such as pipes, cable trays, and ducts, can be installed. It is difficult to cope with the increase in the size and the large weight when a large amount of equipment is integrated into the module structure, which may hinder a significant shortening of the construction period.
[0012]
The present invention has been made in view of such circumstances, it is possible to improve the strength of the module structure, and it becomes easy to cope with the increase in size and weight of the module when integrating a large amount of equipment, In addition, it can be implemented in various forms corresponding to various building structures such as the presence or absence of walls, etc. In addition to being able to modularize a large amount of equipment in various vertical arrangements, it also greatly improves workability such as incorporation into buildings and concrete placement. The purpose is to provide a power plant construction method that can be improved and can improve the reliability of the completed building strength.
[0013]
[Means for Solving the Problems]
To achieve the above object, in the invention according to claim 1, in the power plant construction method having a steel concrete structure using a steel column, a steel beam and a deck plate in at least a part of the building in the power plant, the steel column A module structure having the steel beam, a deck receiving beam for supporting the deck plate, a building device installed in the building, and a support member for supporting the building device, After the module structure is mounted on the foundation or lower floor of the building, concrete is placed around the steel column of the module structure, and the support member and the steel column, or the support member and the steel beam or wherein the joint between the support member and the other support member is embedded in said concrete, the support member of the module structure Among them, an anchor member that can be connected to the concrete without gap is connected in advance to the end portion embedded in the concrete of the steel concrete column or other part, and the whole or a part of the anchor member is embedded in the concrete. A power plant construction method is provided.
[0014]
In the invention which concerns on Claim 2, the said anchor member is provided in the front-end | tip of the said support member, While making the joint of this anchor member match the side surface of the said support member, the length of this anchor member is made from the outer wall surface of the said concrete. The power plant construction method according to claim 1, wherein the power plant is constructed to have a length arranged on the outer surface side .
[0015]
In the invention which concerns on Claim 3, the said anchor member has the attachment form in any one of the structure accommodated in the concrete outside a reinforcing bar, the structure which protrudes to the concrete outer surface, or the structure which protrudes to the concrete outer side. A power plant construction method described in 2 is provided.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a power plant construction method according to the present invention will be described with reference to FIGS. First, a basic configuration example will be described with reference to FIGS. FIG. 1 is a perspective view showing a module structure applied in this embodiment, and FIG. 2 is a side view showing an installed state. FIG. 3 is a cross-sectional view for explaining the concrete placement state of the pillars and wall portions of the building, and FIGS. 4 and 5 are cross-sectional views showing the connecting structure of the support members of the building equipment.
[0021]
The module structure 11 shown in FIG. 1 and FIG. 2 is applied to a part of a building in a power plant, for example, a turbine building. In FIG. 1 and FIG. A module structure of a single-layer floor in which four steel pillars 12 are arranged at each corner is shown (in the following description, for convenience, the surface on the left front side is referred to as the front surface with reference to FIG. The opposite right back side surface is called the back side, the right front side surface is called the right side surface, and the left back side surface facing this is called the left side surface, as shown in FIG. .
[0022]
As shown in FIGS. 1 and 2, each steel column 12 is made of, for example, H-shaped steel. Each steel column 12 has a web facing in the opposing direction of the front and rear surfaces and a flange in the opposing direction of the left and right side surfaces. It is aimed. A steel beam 13 made of, for example, I-type steel is connected between the tops of the steel columns 12 by welding, and the module structure 11 is formed in a gate shape in each side view by these steel beams 13.
[0023]
The left and right deck receiving beams 14 made of I-shaped steel are arranged in parallel on the inner surface of the steel beam 13 (13c, 13d) disposed on the left and right side surfaces, and the end portions of the left and right deck receiving beams 14 are respectively It is joined to the steel beam 13 (13a, 13b) arranged in the front-rear direction by welding. Further, between the left and right deck receiving beams 14, a plurality of intersecting deck receiving beams 15 orthogonal to these are connected by welding in the front-rear direction at intervals. And the upper surface of each deck receiving beam 15 is arrange | positioned at a flat surface, and the deck plate 16 is arrange | positioned on these. The module structure 11 is assembled within the range of the lifting capacity of the lifting equipment in the vicinity of the factory or the plant building. In this case, the steel column 12 and the steel beam 13 are mounted on the surface plate or temporary foundation (not shown). On the other hand, the deck receiving beams 14 and 15 are assembled within a range where there is no hindrance to the suspension work of the plant component equipment, and constitute a basic building member. The deck plate 16 is usually not installed at the time of factory production or the like, at the stage of transporting the module structure 11, and the like, and is installed after the module structure 11 is placed at a predetermined installation position.
[0024]
The module structure 11 according to the present embodiment is connected to at least one of the steel column 12, the steel beam 13, and the deck receiving beams 14, 15 in addition to the steel column 12, the steel beam 13, and the deck receiving beams 14, 15. And a plurality of support members 17, 18, 19, 20, 21, and 22 that support the load of the plant building equipment. That is, between each steel column 12 of the module structure 11, a relatively large frame-shaped support member (first support member) 17 made of I-type steel is located at a certain distance below each steel beam 13 in FIG. It arrange | positions in parallel with each steel beam 13 in the left-right position, and each edge part is joined to the steel column 12 by welding, respectively.
[0025]
These first support members 17 are connected to a steel beam 13 disposed thereabove a required number of vertical support members (second support members) 18 each having a vertical thin box cross-sectional shape by welding. For example, a horizontal thin box cross-sectional support member (third support member) 19 is connected between the left and right second support members 18 by welding.
[0026]
The end portion of the third support member 19 and the first support member 17 are portions embedded in wall concrete or the like to be placed after installation. Therefore, an anchor member 23 made of I-type steel or the like that can be bonded to the concrete without a gap is connected to the end of the third support member 19 at the end embedded in the concrete of the steel concrete column or other parts. ing. The anchor member 23 will be described in detail later with reference to FIGS. 4 and 5.
[0027]
Further, a horizontal support member (fourth support member) 20 is welded between the vertically long second support member 18 disposed at the front center position of the module structure 11 and the steel column 12 facing the left side thereof. A vertically long support member (fifth support member) 21 is joined to the intermediate portion of the fourth support member 20 with the steel beam 13 disposed above the fourth support member 20 by welding. Further, a vertical third support member (sixth support member) 22 is provided between the horizontal third support member 19 disposed substantially in the center of the module structure 11 and the deck receiving beam 15 disposed above the third support member 19. The sixth support member 22 is joined by welding, and although not shown, for example, a support member parallel to the fourth support member 20 on the front surface of the module structure 11 is provided.
[0028]
By such support members 17-22, the module structure 11 is reinforced and rigidity is improved with respect to loads in each direction. In addition, on the horizontal first support member 17, second support member 18, fourth support member 19, etc., building equipment 24 for plant configuration, for example, various pipes 24 a, cable trays 24 b, and the like are supported. As a result, the steel column 12, the steel beam 13, the deck receiving beams 14 and 15 for supporting the deck plate 16, and the steel column 12, the steel beam 13, the deck receiving beams 14, 15 and the like are connected. The supporting members 17 to 22 that reinforce them and support the load of the building equipment 24 such as the various pipes 24a and the cable tray 24b, and the building equipment supported by the supporting members 17 to 22 in advance. An integrated module structure 11 is configured.
[0029]
It should be noted that the building structure is provided with the second support member 18 for connecting the steel beam 13 and the first support member 17 according to the strength requirement of the module structure 11 or the layout design requirement of the building equipment 24. Thus, the structural design of the building equipment can be performed without considering the entry into the building, so that the structural design of the building equipment 24 can be facilitated and the overall strength of the module structure 11 can be increased. It is possible to increase the height and obtain a reinforcing function for preventing deformation when the module structure is suspended.
[0030]
After most of the installation work of the building equipment 24 is completed, the remaining deck receiving beams 14 and 15 that are not installed for the hanging work of the building equipment 24 are attached, and the deck receiving beam is further installed. By connecting 14, 15 and the support member or the like, the installation work of the building equipment 24 as the module structure 11 is completed. And after the installation operation | work of the building equipment 24 is completed, the deck plate 16 is attached and the module structure 11 is completed.
[0031]
A part of the deck plate 16 or the building equipment 24 can be reduced from the module structure 11 in order to reduce the weight of the module structure 11 and be within the lifting function force range. In addition, when there is a margin in the lifting function force, it is possible to attach a reinforcing bar, which will be described later, a concrete mold (not shown), or the like to the steel column 12 or the steel beam 13. The module structure 11 thus completed is suspended and installed in a construction site of the plant building by a temporary lifting machine.
[0032]
3 and 4, after the module structure 11 is mounted on the foundation or lower floor 25 of the building, the reinforcing bars 26 are arranged around the steel column 12 of the module structure 11 and the concrete 27 is placed. It is a figure which shows the state which arrange | positioned the steel frame reinforced concrete pillar 28, the reinforcing bar between pillars, and laid concrete 27, and formed the reinforced concrete wall 29. FIG.
[0033]
Here, FIG. 3 shows a reinforced concrete wall 29 when the anchor member 23 is not provided on the third support member 19 described above. As shown in FIG. 3, when a hollow tube such as a box-type steel pipe is applied to the steel material of the third support member 19 and directly joined to the first support member made of I-type steel, Since the concrete does not enter the embedded third support member 19, the hollow portion 30 is generated, and the required strength of the concrete wall 29 may not be obtained.
[0034]
On the other hand, in FIG. 4, an anchor member 23 made of, for example, I-shaped steel is provided at the tip of the third support member 19 having a box-shaped cross section, and the joint of the anchor member 23 is matched with the side surface of the first support member 17. The length of the anchor member 23 is set to be longer than the outer wall surface of the concrete 29. In the case of such a configuration, the anchor member 23 that can be coupled to the concrete 29 without a gap is connected in advance, so that a cavity is generated at the joint between the third support member 19 and the first support member 17. The required strength of the concrete 29 can be obtained. The anchor member 23 is not limited to the I-shaped steel, but may be any anchor member formed so as not to generate a hollow portion of H-shaped steel, U-shaped steel, or concrete.
[0035]
FIGS. 5A, 5 </ b> B, and 5 </ b> C are schematic views showing different attachment modes of the anchor member 23. Since the range of the strength calculation of the concrete 29 is generally defined by the inner dimension of the reinforcing bar 26, the anchor member 23 is accommodated in the soft concrete 29a outside the reinforcing bar 26 as shown in FIG. Alternatively, as shown in FIG. 5 (b), a structure that protrudes to the outer surface of the soft concrete 29a, and a structure that has any mounting form that protrudes outward from the soft concrete 29a as shown in FIG. 5 (c). Can be adopted. By adopting these configurations, it is possible to prevent a decrease in the strength of the concrete due to the hollow portion.
[0036]
Next, application examples will be described with reference to FIGS.
[0037]
First, as an application example, FIG. 6 shows the application of the basic configuration shown in FIG. 1 as a two-story floor in the vertical direction, and in the horizontal direction, the basic configuration shown in FIG. The module structure has the shape described above. The module structure shown in FIG. 6 is also applied to a part of a building in a power plant, for example, a turbine building, and is an expanded version of the function shown in FIG. Corresponding identical parts are denoted by the same reference numerals as those in FIG. According to the configuration shown in FIG. 6, an excellent effect is exerted in application to a large building configuration.
[0038]
Next, the load sharing method will be described with reference to FIGS. In the present embodiment, the module structure 11 is formed as having a plurality of levels, and the load of the building equipment 24 or the load of the placing concrete 29 is distributed and borne in each level. In this case, a push-up member or a suspension member that supports the steel beam, the deck receiving beam, or the support member of each layer from any one of the upper and lower directions is applied as a support unit that distributes and loads the load in a plurality of layers. Is.
[0039]
That is, FIG. 7A and FIG. 7B are conceptual diagrams for distributing the load of the building equipment 24 of a module structure having a three-layer structure. In the configuration shown in FIG. 7A, loads 31, 31, 31 of building equipment 24, 24, 24 of each level are applied to the steel beam 13 or the deck receiving beams 15, 15, 15 of the ceiling part of each level. It is a structure that can be handled. In this case, as shown by the upward arrow 31, the suspension member is applied, and it is possible to prevent the concentration of loads on a specific level.
[0040]
FIG. 7B shows the case where the steel beam 13 or the deck receiving beam 15 cannot withstand the load when the concrete 29 is placed after the module structure 11 is installed at the construction site of the plant building. Is assumed. In this case, the load 31 of the building equipment 24 is supported by the steel beam or the deck receiving beam 15, so that the suspension member is applied as indicated by the upward arrow 31, and the load to a specific level is set. Can be prevented.
[0041]
Furthermore, FIG. 8 applies the push-up member 32 as shown by the upward bold arrow when the load distribution in FIGS. 7A and 7B cannot avoid the concentration of the load on a specific level. It is a conceptual diagram which distributes the load of building equipment 24 as composition. For example, when the load 31 of the building equipment 24 and the casting load of the concrete 11 are applied to the steel beam 13 or the deck receiving beam 15, the load on the steel beam 13 or the deck receiving beam 15 is provided by installing the push-up member 32 or the like. It is possible to distribute the load to the deck receiving beam 15 of each level or a building mat (not shown).
[0042]
As described above, in the present embodiment, the steel column 12 installed at the construction site of the plant building and the steel beam 12 joined to the steel column 12 and constituting the floor surface have an arbitrary height between each other. The building members constituting the building composed of the supporting members 17 to 22 and the deck receiving beams 14 and 15 connected to the steel beam 13 and the pipes, equipment and supporting structures installed at the construction site are constructed. The module structure 11 that is integrated with the building interior equipment 24 is configured, and after the building mat portion 25 or the lower layer building of the module structure 11 is completed, the module structure 11 is suspended at the construction site, and the building mat portion 25 or the module It joins with the lower layer building of the structure 11, and after that, rebar construction, concrete formwork, and concrete placement work are performed. Further, the support members 17 to 22 joined to each other or the steel column 12 or the steel beam 13 are used as the reinforcing members of the module structure 11. According to such a method, the support structures 17 to 22 of the module structure 11 can be used as a reinforcing material for preventing deformation, the module structure can be increased in size and weight, and the number of times the module structure is carried in. This is advantageous for shortening the construction period.
[0043]
Further, all or a part of the joined portions of the support members 17 to 22 joined to the steel column 12 or the steel beam 13 is embedded in the concrete 29 that is cast after the module structure 11 is suspended at the construction site. It is what I did. Further, the support member is joined through the anchor member 23 joined to the steel column 12 or the steel beam 13, and all or a part of the anchor member 23 is placed after the module structure 11 is suspended at the construction site. Embedded in the concrete 29. According to such a method, in the design of the module structure 11, the restriction on the mounting position of the support structures 17 to 22 is greatly eliminated, and the strength of the module structure in which the support structure is arranged at an appropriate position is increased. Therefore, the module structure 11 can be increased in size and weight, which is advantageous for shortening the construction period. Moreover, the installation quantity of the embedding | buying metal object previously embed | buried in a concrete building can be reduced, and it becomes advantageous on construction.
[0044]
In this embodiment, the concrete reinforcing bar 26 or the concrete reinforcing bar 26 and the formwork are attached to the steel column 12 and the steel beam 13 constituting the module structure 11. According to such a method, the reinforcing bar and the formwork work period after the module structure 11 is carried in become unnecessary, which is advantageous in shortening the work period.
[0045]
Furthermore, in this embodiment, since the module structure 11 has a plurality of layers, the module structure can be increased in size and weight, which is advantageous in shortening the work period. Furthermore, by distributing the load of the building equipment 24 that constitutes the plant to a plurality of hierarchies, it is possible to increase the number of building equipment installed in advance in the module structure, which is advantageous in shortening the construction period. Further, the module structure 11 has a plurality of layers, and the load of the building equipment 24 constituting the plant is distributed and burdened to the plurality of layers by a push-up or suspension member, thereby preventing an increase in building member dimensions. This is advantageous for construction.
[0046]
【The invention's effect】
As described above, according to the present invention, the strength of the module structure can be improved, and it is easy to cope with the increase in size and weight of the module when a large amount of equipment is integrated. A power plant construction method that can be shortened can be provided.
[Brief description of the drawings]
FIG. 1 is a side view from the front corresponding to FIG. 1 according to the embodiment.
FIG. 2 is a cross-sectional view showing an example of a joint structure between a building member and a support structure according to the embodiment.
FIG. 3 is a cross-sectional view showing an example of a joint structure between a building member and a support structure according to the embodiment.
FIG. 4 is a cross-sectional view showing an example of a joint structure between a building member and a support structure using the anchor member according to the embodiment.
FIGS. 5A, 5B, and 5C are cross-sectional views showing examples of the joining structure of anchor members according to the embodiment, respectively.
FIG. 6 is a perspective view showing an application example of a module structure having a multilayer structure according to the present invention.
FIGS. 7A and 7B are explanatory diagrams in the case where the load of the equipment of a module structure having a multilayer structure is dispersed.
FIG. 8 is an explanatory diagram in the case of distributing the load of the equipment of a module structure having a multilayer structure according to the present invention.
FIG. 9 is a cross-sectional view showing an example of a joint structure between an embedded metal and a support structure by a conventional method.
[Explanation of symbols]
11 Module structure 12 Steel columns 13, 13a, 13b, 13c, 13d Steel beams 14, 15 Deck receiving beam 16 Deck plate 17 First support member 18 Second support member 19 Third support member 20 Fourth support member 21 5th Support member 22 Sixth support member 23 Anchor member 24 Indoor equipment 24a Piping 24b Cable tray 25 Lower floor 26 Reinforcement 27 Concrete 28 Steel reinforced concrete pillar 29 Reinforced concrete wall 30 Cavity 31 Load 32 Push-up member

Claims (3)

In a power plant construction method having a steel concrete structure using a steel column, a steel beam, and a deck plate in at least a part of a building in the power plant, the deck for supporting the steel column, the steel beam, and the deck plate A module structure having a receiving beam, building equipment installed in the building, and a support member that supports the building equipment, and mounting the module structure on a foundation or a lower floor of the building Later, concrete is placed around the steel column of the module structure, and the joint between the support member and the steel column, or the support member and the steel beam , or the support member and another support member is formed as described above. The concrete structure is embedded in the concrete, and the concrete structure pillars and other parts of the support member of the module structure A power plant construction characterized in that an anchor member that can be coupled to the concrete without a gap is connected in advance to an end portion embedded in a ground and the entirety or a part of the anchor member is embedded in the concrete. Construction method.   The anchor member is provided at the front end of the support member, the joint of the anchor member is matched with the side surface of the support member, and the length of the anchor member is arranged on the outer surface side of the outer wall surface of the concrete. The power plant construction method according to claim 1.   3. The power plant construction method according to claim 2, wherein the anchor member has an attachment form of any one of a configuration housed in concrete outside a reinforcing bar, a configuration protruding to the concrete outer surface, or a configuration protruding to the outside of the concrete.

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