JP2000220207A - Reinforced concrete building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize space efficiency of a reinforced concrete building, avoiding deterioration of building strength. SOLUTION: In a floor-cum-ceiling wall 15 and a side wall of a reinforced concrete building, the areas of beams 1 of a ceiling are built in part of the floor-cum-ceiling wall 15 and the side wall and reinforced to strength having the function of beams compared to the other wall part. The projection of beams and columns is therefore eliminated to realize a flat wall surface excellent in space efficiency in the building without lowering strength, and laying of piping 21 and a duct 23 can be easily executed as linear routes because of no need of detour of the beams.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology related to a reinforced concrete building.

[0002]

2. Description of the Related Art JP-A-61-254727 and JP-A-61-10
No. 6872 discloses a building structure in which beams and columns are not described.

However, in order to install a heavy object such as plant equipment in such a building structure and to secure a wide space, it is assumed that it is difficult to sufficiently support the building's own weight and the weight of the equipment only by the walls.

[0004] Therefore, large beams and columns are employed so that the assumption is not realized.

As one example, Japanese Patent Application Laid-Open No. 4-254644 is listed. As in the example, the pillars and beams protrude largely from the ceiling wall or side wall which also serves as the floor into the room, and a dead space is generated between the wall surface and the protruding end face, resulting in poor space efficiency.

The floor / ceiling wall and side walls of each floor of a reinforced concrete building are subjected to a considerable load of equipment, piping, etc., and the beams and columns for supporting the loads are flush with the floor / ceiling walls and side walls. It has a structure that protrudes into the room from above.

A typical structure such as a beam is shown below.

FIG. 2 is a cross-sectional view showing a beam projecting structure at a connection portion between the beam 1 and the column 2 at the floor / ceiling wall 15 by the conventional method. In this conventional method, the skeleton structure forming the connecting portion between the beam 1 and the column 2 includes not only strength members such as the reinforcing bar 10 and the concrete 11 in the beam 1 but also a spiral stirrup at the connecting portion between the beam 1 and the column 2. 3 and has a structure of a strength member reinforced by a main bar 5 inside.

As shown in FIG. 3, the structure of the beam 1 at the floor / ceiling wall 15 has a cross section in which the lower part 6 of the beam 1 projects downward from the lower surface of the floor / ceiling wall 15. In the conventional method, the skeleton structure constituting the beam 1 includes not only strength members such as reinforcing bars 10 and concrete 11 in the beam 1 but also spiral stirrups 3 employed in the beam 1.
, And has a structure of a strength member reinforced by the main bar 5 inside.

Since the strength of the floor / ceiling wall 15 needs to be satisfied by the stirrups 3 and the main bars 5 and the reinforcing members 10 of the beams 1 and the concrete 11, the columns shown in FIG. Also in the case without the case, the structure was such that the lower part of the beam 6 protruded largely into the room.

FIG. 5 shows a pillar 8 formed by a conventional method in a side wall 7 portion.
FIG. 2 shows a cross-sectional view of the structure from which the protrusions are seen from above. According to the conventional method, the frame structure constituting the column 8 in the side wall 7 includes a reinforcing member such as a reinforcing bar 10, a steel frame, and concrete 11 on the side wall 7, and a helical band 4 at the connecting portion between the side wall 7 and the column 8. , And a strength member structure reinforced by the main bar 5 is provided inside.

The strip bar 4 and the main bar 5 have a structure protruding into the room from the side wall 7 in order to satisfy the strength of the side wall 7 by the reinforcing bar 10, steel frame, concrete 11, etc. of the column 8 part. Was.

[0013]

In the conventional reinforced concrete framing work for the floor / ceiling wall and side wall of the building in the conventional method, in addition to the work of forming and arranging the flat floor, a projecting type parallel to this is used. It is necessary to construct the beam formwork and reinforcement. Therefore, in the formwork and reinforcing work, the construction of the protruding formwork is complicated and critical, requiring much labor and work period.

In the design and construction of equipment, pipes, ducts, etc., a dead space 14 is formed in the space between the floor / ceiling wall 15 and the lower part of the beam 6 (or between the wall and the column protrusion). In addition, this leads to an increase in the amount of materials such as pipes and supports, and a great deal of labor is required for composite adjustment for avoiding interference between the beam 1 and the equipment, pipes, ducts, and the like.

In order to avoid the interference, as generally shown in FIG. 7, the pipe 21 is bent downward so as to bypass the beam 1 and has a low height in the room below the lower end surface of the beam 1. Is passed horizontally, and is again bent up to the original height in the vicinity of another beam 1.

[0016] For this reason, not only does the number of bendings of the pipes increase, and the resistance of the flow of the fluid in the pipes increases, so that not only the driving force of the fluid must be increased, but also the pipes pass through a low position in the room. This causes problems such as the need to consider avoiding interference with equipment installed on the floor in the room.

In the conventional construction method, since the pillar 8 protruding from the scaffold 31 to be used for the construction of the building is set at a position avoiding,
In areas where it is not possible to move the scaffolding to the side wall side, and in the area where the leading equipment must be carried in the process, interference between the scaffold 31 and the equipment occurs. It may be a factor that causes trouble in the parallel work with the work.

Since a dead space 14 is formed below the floor / ceiling wall 15 or in the space between the side wall and the column protrusion, the size of the building is increased and the amount of piping, supports, etc. laid along the floor / ceiling wall 15 is increased. The route structure of trays for connecting equipment, pipes, ducts, electric cables, and the like laid along the floor / ceiling wall 15 while being connected is complicated, and much effort is required for composite adjustment for avoiding interference.

An object of the present invention is to improve the space efficiency of a reinforced concrete building while ensuring strength.

[0020]

Means for achieving the object of the present invention are, as an example, a method in which a reinforced concrete floor / ceiling wall strength member (reinforced steel, concrete, etc.) of a reinforced concrete building is replaced with a conventional floor / ceiling wall. In addition to the strength of the beam, a beam-free structure that eliminates the projecting beam from the floor / ceiling wall by increasing the members or additionally reinforcing the steel so that it has the same strength as the beam that has protruded conventionally It is.

Another means is to add, as an example, the strength members (reinforcing bar, steel frame, concrete, etc.) of the reinforced concrete side wall of the reinforced concrete building to the strength of the conventional side wall, and furthermore, the strength is equal to the strength of the pillar portion protruding from the side wall. It is a column-free structure that eliminates pillars protruding from the side walls by increasing the members or additionally reinforcing the reinforcing bars so as to achieve the strength.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Among the buildings of a nuclear power plant, a reactor building and a turbine building are generally reinforced concrete buildings.

When the reinforced concrete building is constructed, the floor / ceiling wall and the side walls of each floor of the building are subjected to a considerable load of equipment, piping, etc., so that the floor / ceiling wall is used to support the load. , Considerable strength is set on the side wall.

In the framing work for constructing the floor / ceiling wall 15 of the building, first, the concrete form 9 of the floor / ceiling wall 15 to be constructed by supporting the floor below the floor / ceiling wall 15 to be constructed is supported. And set. After setting the shoring and formwork 9,
The reinforcing bar 10 of the floor / ceiling wall 15 to be constructed, the spiral stirrup 3 and the main bar 5 are arranged and arranged as shown in FIG. Next, concrete is cast in the area of 15 floor / ceiling walls to be constructed. This is basically the same for the construction procedure of the side wall 7 and the two pillars of the building.

In order to set the strength of the beam 1 shown in FIG. 2 in the area of the beam 1 shown by the dotted line in the floor / ceiling wall 15 of FIG. 1, the rose set in the area of the beam 1 of FIG. The streaks 3 are arranged along the floor / ceiling wall 15 (horizontal direction), are also arranged in the longitudinal direction (vertical direction) of the pillar 2, and are arranged in a T-shape as shown in FIG. The stirrup 3, main bar 5, and reinforcing bar 10 in FIG. 1 are higher in strength than the conventional stirrup 3, main bar 5, and reinforcing bar 10 in FIG. The stirrup 3, main bar 5, and reinforcing bar 10 in FIG. 1 are thicker than the conventional stirrup 3, main bar 5, and reinforcing bar 10 in FIG. Moreover, as can be seen from a comparison between FIGS. 1 and 2, in the example of FIG. 1, the arrangement area of the stirrups 3 and the main streaks 5 is made wider in the horizontal and vertical directions than in the conventional example of FIG. Since the number of the main muscles 5 inside the muscles 3 is also increased for reinforcement, the reinforcement area is spread in a T-shape.

In this way, the stirrup 3, the main bar 5, and the reinforcing bar 10, which are the strength members of the beam 1, are reinforced with high strength.
Further, the area of the beam 1 is widened in the horizontal direction and the vertical direction, and the strength of the beam equivalent to the conventional one is set in a part of the floor / ceiling wall 15 and the area of the beam 1 indicated by a dotted line in FIG. .

In some cases, the formwork 9 may be anchored to cast concrete as needed and left as a lining material as shown in FIG. In that case, a steel plate made of a desired lining material is used as the mold. The same applies to the side wall 7.

When it is not necessary to leave the form 9, the concrete is hardened and cured, and then the form 9 and the support are dismantled, and the cleaning and cleaning are performed. The same applies to the side wall 7.

After the concrete has hardened, the floor / ceiling wall 15 of equipment, pipes, ducts, electric cable trays, etc.
The installation work for carrying in and installing on the side wall 7 is proceeded.

As shown in FIG. 1, the cross section at the connecting portion between the floor / ceiling wall 15 and the pillar 2 constructed as described above is as follows.
The area indicated by the dotted line in the floor / ceiling wall 15 and the pillar 2 is the beam 1
It can be understood that the flat structure is eliminated by eliminating the protrusion in the horizontal / horizontal direction of the pillar 2 below the floor / ceiling wall 15 in the region of the beam 1 at the connecting portion of the region of the beam 1 and the column 2.

In the example of FIG. 1, in the structure of the beams 1 and the columns 2 of the reinforced concrete ceiling of the building, the strength members (reinforcing bars 10, concrete 11, etc.) of the floor and ceiling wall 15 are added to the conventional 15 strength, and furthermore, The stirrups 3 are additionally provided and reinforced in the column direction so as to have the same strength as that of the conventional projecting beam 1, and the main bars 5 are additionally provided and reinforced according to the above, and furthermore, the stirrups in the beam direction are further provided. By expanding the range of the streaks 3, the strength of the floor / ceiling wall 15 equivalent to that of the conventional structure in FIG. 2 can be satisfied, and a beamless structure without the protruding beam portion can be realized.

Floor / ceiling wall 1 without connection to pillar 2
The structure of 5 is shown in FIG. That is, in FIG. 4, the reinforcing bar 10 of the floor / ceiling wall 15, the spiral stirrup 3, and the main bar 5 surrounded by at least the stirrup 3 correspond to the reinforcing bar 10 of the beam 1 according to the conventional example of FIG. A bar that is thicker and stronger than the main bar 5 surrounded by the bar 3 and the stirrup 3 is adopted.

As a result, the area of the beam 1 surrounded by the dotted line in the floor / ceiling wall 15 has the same strength as the beam 1 according to the conventional example of FIG.

Further, in order to obtain a sufficient strength, the thickness of the floor / ceiling wall 15 shown by the dashed line in FIG.
a is increased to the thickness 13 of the floor / ceiling wall 15 indicated by the solid line, and the strength is increased accordingly. The thickness 1 of the floor and ceiling wall 15
In increasing the number 3, the thickness of the conventional beam shown by the chain line in FIG. For this purpose, the reinforcing bars 10 and stirrups 3 of the floor / ceiling wall 15 and at least the main bars 5 surrounded by the stirrups 3 are made thicker and have high strength, or measures are taken to increase their bar arrangement density.

In this way, the floor / ceiling wall 15 of FIG. 4 has a flat structure in which the protrusion of the beam is eliminated.

In addition, the strength members (reinforcing bars 10, stirrups 3, reinforcing bars 3) of the floor / ceiling wall 15 in the area of the beam 1 indicated by the dotted line in FIG.
Main bars 5, concrete 11 etc.) are replaced with the conventional floor / ceiling wall 15
In addition to the strength, the strength of the floor / ceiling wall 15 equivalent to that of the conventional structure can be satisfied by strengthening or increasing the floor thickness 13 so that the strength becomes equal to the strength of the conventional beam portion shown in FIG. Therefore, it is possible to provide a beamless structure in which the projecting beam portion is eliminated.

As described above, when the floor / ceiling wall 15 has a flat structure with no protrusion of the beam 1, as shown in FIG.
1, ducts 23, trays and the like laid on the floor / ceiling wall 15 can be laid in a state where the number of bending is small, for example, in a straight line, and the routes of the pipes 21, the ducts 23, the trays and the like can be straightened. And rationalize design / construction aspects. Further, the flow of the fluid in the pipe 21 becomes smooth without receiving the resistance due to the pipe bending, and the driving force of the fluid can be reduced.

Also, as shown in FIG.
3. Since the trays and the like can pass through higher places than the conventional example of FIG. 7, the frequency of taking care of avoiding interference with equipment installed on the floor below the pipe 21, the duct 23, the trays, etc. is reduced. I can do it.

In the embodiment of the present invention, since the dead space 14 due to the beam 1 as shown in FIGS. 2 and 3 does not exist as shown in FIG.
4 is enlarged even if the distance between the floor and the ceiling wall 15 is the same.

The structure of the side wall 7 of the reinforced concrete building is shown in FIG.

That is, in FIG. 6, the reinforcing bar 10 on the side wall 7, the spiral bar 4, and at least the main bar 5 surrounded by the bar 4.
Is larger than the reinforcing bar 10, the band bar 4, and the main bar 5 of the column 8 according to the conventional example shown in FIG. The number of the main bars 5 is increased as compared with the conventional example shown in FIG.

As a result, the region of the column 8 surrounded by the dotted line in the side wall 7 has the same strength as the column 8 according to the conventional example of FIG.

Further, in order to obtain a sufficient strength, the area of the pillar 8 shown by the dotted line in FIG. 5 is conventionally expanded horizontally along the side wall to the area surrounded by the dotted line in FIG.

In this manner, the strength of a part of the side wall 7 is continuously increased from the upper end to the lower end, that is, from the upper end to the lower end of the region of the pillar 8, and the region to be strengthened is also horizontally extended. Expanding.

If concrete is poured and solidified in such a state of reinforcing bars, as shown in FIG.
Have a flat structure with no protrusion. Moreover, the strength members (reinforcing bar 10, band reinforcing bar 4, main reinforcing bar 5, concrete 11) in the area of the column 8 shown by the dotted line in FIG.
Etc.) so that the strength of the conventional column 8 can be satisfied. Therefore, the column-less structure without the protruding column 8 portion while having sufficient strength to support the weight of the equipment installed on the floor and ceiling wall 15. It became possible to do.

As described above, when the side wall 7 has a flat structure without protrusion of the pillar 8, the horizontal dead space 14 shown in FIG. 5 is eliminated as shown in FIG. 6, and the space efficiency in the horizontal direction is improved.

Therefore, the scaffold 31 used for building a building or installing equipment can be placed closer to the side wall 7 than before. This is because even if the scaffold 31 exists, FIG.
Since the space in the horizontal direction can be enlarged by the conventional dead space 14, a wide device can be carried through the space between the side walls 7 without removing the scaffold. Therefore, it is possible to contribute to shortening the construction period of the nuclear power plant by translating the building construction work and the equipment carry-in installation work. If the floor / ceiling wall 15 also adopts a structure with no projecting beams as shown in FIGS. 1 and 4, it is possible to allow the passage of equipment that is larger in the vertical direction than in the past, and it is time-consuming to separate large equipment into smaller parts. The labor required to assemble the subdivided parts before they are separated is reduced. The work to carry in the equipment that has been modularized can be efficiently performed by expanding the modularization range of the carry-in equipment by expanding the carrying space. These facts can contribute to shortening the construction period of a nuclear power plant.

As described above, the following effects can be obtained in the reinforced concrete building of this embodiment employing the side wall 7 of FIG. 6 and the floor / ceiling wall 15 of FIGS. 1 and 4.

That is, since the area of the pillars 8 and the beams 1 exists in a part of the inside of the wall with a higher strength than that of the other wall part, the dead zone is provided irrespective of the high strength building by the beams 1 and the columns 8. Space 1
A space-efficient building without 4 can be obtained.

Also, in the conventional method of forming the formwork 9 and reinforcing bars, the work of forming the formwork in accordance with the projecting shape of the beam or the column is complicated and critical, requiring a large amount of labor and work time. Furthermore, since the scaffold 31 on the architectural side is installed at a position avoiding the pillar 8 protruding, the scaffold 31 and the equipment must be connected to each other in an area where the equipment needs to be carried in advance with the scaffold in the process. Interference may occur, which may hinder the translation of the construction of the building and the loading and installation of the equipment. However, in the embodiment of the present invention, the projecting portion of the form 9
Critical processes in rebar construction work have been eliminated, and even when the scaffold 31 is installed, the scaffold can be installed on the basis of the wall surface without being affected by the pillar protrusions, and the effective space for carrying equipment such as equipment to be installed is reduced. Expanding. This also contributes to shortening the construction period of the nuclear power plant by efficiently carrying in the equipment that has been modularized by expanding the modularization range of the equipment to be carried in by expanding the carrying space.

Further, conventionally, as shown in FIG. 7, since the piping laid on the floor / ceiling wall 15 has to avoid a route avoiding the beams, a lot of labor and work period are required in terms of design / construction. According to the embodiment of the present invention, as shown in FIG. 8, the equipment, the piping 21, the support 22, the duct 23,
In the sleeves 25 penetrating the floor / ceiling wall 15, the route is simplified without considering the protruding beams and the like, and the design / construction is rationalized.

In addition, since the conventional dead space 14 can be effectively used, the entire building can be made compact.

[0053]

According to the present invention, the function of pillars or beams of the side wall or the floor / ceiling wall is provided in the wall, and the protrusion of the columns or beams is eliminated so that the strength is not reduced as much as possible. As a result, the space efficiency in the building is improved, and the construction period of the plant can be shortened. In addition, the piping, ducts, and trays of the piping, ducts, and trays in the building of the plant are made linear to form a straight line. The effect of reducing the cost of the plant can be obtained by reducing the amount of materials and the amount of bending.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a connection part of a beam and a pillar of a floor / ceiling wall according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a connection portion between a beam and a pillar of a floor / ceiling wall according to a conventional example.

FIG. 3 is a vertical cross-sectional view of the vicinity of a beam portion of a floor / ceiling wall according to a conventional example.

FIG. 4 is a longitudinal sectional view showing the vicinity of a beam region of a floor / ceiling wall according to an embodiment of the present invention.

FIG. 5 is a cross-sectional plan view of a conventional side wall structure having a columnar projecting portion on the indoor side on a side wall (building outdoor wall).

FIG. 6 is a plan sectional view of a side wall structure in a state where a scaffold is arranged on the indoor side along a side wall (building outdoor wall) according to an embodiment of the present invention.

FIG. 7 is a perspective view showing a floor / ceiling wall arrangement on a plurality of floors in a case where the floor / ceiling wall according to the conventional example is provided, in a state where pipes and ducts are constructed.

FIG. 8 is a perspective view showing an arrangement of floors and ceiling walls on a plurality of floors in a case where floors and ceiling walls are provided according to an embodiment of the present invention, in a state where pipes and ducts are constructed.

[Explanation of symbols]

1 ... beam, 2 ... pillar, 3 ... stirrup, 4 ... band, 5 ... main,
6: Under beam, 7: Side wall, 9: Formwork, 10: Reinforcement, 11: Concrete, 14: Dead space, 15: Floor and ceiling wall, 21: Piping.

Continuing on the front page (72) Inventor Koichi Gota 3-1-1, Sachimachi, Hitachi-shi, Ibaraki Pref. Hitachi, Ltd. Hitachi Plant (72) Ryohei Miyahara 3-1-1, Sachimachi, Hitachi-shi, Ibaraki Inside Hitachi, Ltd.Hitachi Plant (72) Inventor Tadaaki Oikawa 3-1-1, Sachimachi, Hitachi, Ibaraki Prefecture Inside Hitachi, Ltd.Hitachi Plant (72) Inventor Noriaki Oshima 3-chome, Sachimachi, Hitachi, Ibaraki No. 1-1 Inside Hitachi, Ltd. Hitachi Plant (72) Inventor Atsushi Miura 3-1-1, Sachimachi, Hitachi City, Ibaraki Prefecture Inside Hitachi, Ltd. Hitachi Plant

Claims (7)

[Claims] 1. A reinforced concrete building in which a reinforced concrete beam or a reinforced concrete column is embedded in a reinforced concrete wall to prevent the beam or column from protruding from the wall. 2. A reinforced concrete building in which a portion of a reinforced concrete wall is reinforced within a range of the thickness of the wall to a strength equivalent to a beam or a pillar of the reinforced concrete building. 3. A reinforced concrete building in which a reinforcing member of a beam is embedded in a reinforced concrete wall and a reinforced concrete column. 4. A stirrup laid in a connecting portion between a reinforced concrete wall and a reinforced concrete column in a plurality of directions along the wall and in a longitudinal direction of the column as viewed in a longitudinal section of the connecting portion. Reinforced concrete building with built-in. 5. A reinforced concrete building in which a reinforcing member of a beam or a column is embedded in a part of a reinforced concrete wall within a thickness of the wall. 6. A part of a reinforced concrete wall embedded with a beam or column strength member within a thickness of the wall, and a pipe, duct or tray is laid along the wall so as to intersect the part of the wall. Reinforced concrete building. 7. A reinforced concrete building in which a reinforcing member of a beam or a column is embedded in a part of a reinforced concrete wall of an access path for carrying in equipment within a thickness of the wall.