JPS6025575B2 - Building construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a building construction method for a multi-story concrete IJ building.

[Technical background of the invention and its problems] Regarding the conventional building construction method, taking a nuclear reactor building as an example,
This will be explained with reference to the attached drawings.

FIG. 1 is a sectional view showing the entire reactor building, in which a reactor containment vessel 11 is provided surrounding a reactor pressure vessel 10, and a concrete shielding wall 12 is provided on the outside of the reactor containment vessel 11. , many concrete floors 13 connected to this
There are walls and walls that divide the space and form rooms.
In the construction of such a reactor building, as shown in Figure 2, which is an enlarged view of the section marked by ``Ro'' in Figure 1, a wall ``la'' is erected on top of the floor 14 of the lowest floor, which has been poured with concrete. Raise,
The ceiling, that is, the floor 13 of the upper floor is built on this, and the wall l
A was raised and floor 13 of the upper floor was constructed.

In other words, Figure 2 shows the situation in which the ceiling of the second floor is being constructed, and when the wall la has been completed almost to the bottom of the ceiling beam, the support lb is erected from the top of the floor 13 of the second floor and the formwork is installed. After supporting the IC, attaching reinforcing bars lf to the top of the formwork IC, and arranging locking members ld for equipment suspended from the ceiling as necessary, or embedded piping le, etc., pour 1 g of concrete. The ceiling of the second floor was being finished. After 1 g of concrete had been cured for 2 to 3 days, wall reinforcing bars were assembled, scaffolding was installed, and formwork was stacked up, and side walls were erected upwards. The conventional construction method was as described above, but in such a construction method, the hem of the floor cannot be finished unless the curing period for 1 gram of poured concrete has finished, the shoring lb and formwork lc have been carried out, and the concrete has been removed. If work on equipment, indoor piping, toilets, ducts, etc. cannot begin, work on the side walls of the upper floors will not proceed until after 1 gram of concrete has been poured, and work on piping, toilets, ducts, etc. that engages with the ceiling. Therefore, there was an inherent cause for delays in the construction period, such as the need to erect construction scaffolding again after the removal of the shoring lb.

Furthermore, construction work using scaffolding has many problems, such as safety restrictions due to simultaneous work on the upper and lower floors, and many obstacles to traffic and transportation on the floor. [Purpose of the Invention] The present invention is concerned with the construction of each floor of a multi-story concrete building, and after completion of the side wall work on the floor, the ceiling partitions can be completed promptly to enable safe work in the floor space.
The object of the present invention is to provide a building construction method that can shorten the construction period of a building and a plant including the building.

[Summary of the invention]

That is, in the present invention, in a building construction method in which the lower floors are raised sequentially from the lower floors to the upper floors, the side walls of the lower floors have reinforcing bars protruding horizontally at the ridges facing the floor reinforcements to be laid on the adjacent upper floors. will be erected on the upper floor adjacent to the lower floor beyond the level of the floor to be constructed, and the girder members will be constructed on support members installed internally with a bearing surface at a level lower than the level of the side wall reinforcing bars. Then, a pre-formed frame member is mounted on this girder member,
The floor reinforcement for the upper floors is laid on top of this frame member by connecting it with the protruding reinforcing bars, then the floor concrete for the upper floors is poured, and the above process is repeated to successively move the lotuses to the upper floors. This method provides a building construction method in which blocks of frame members for constructing the ceiling section, that is, the adjacent upper floor section, are manufactured prior to the completion of the construction of the side wall connected to the lower part, and after the completion of the side wall construction. It is possible to immediately install frame members to partition the upper and lower floors, reduce or omit the need for supporting the frame members, and construct the upper floors.
This achieves the above objective by making it possible to install equipment in the lower floor space without having to provide additional protection.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 3 to 7.

FIG. 3 shows the structure of a block ceiling frame member 3i, in which embedded members 2e for supporting, such as anchor bolts, for equipment to be installed on the floor of the upper floor are welded at various places to a corrugated steel plate 2a of the required dimensions. There is.

Further, a drain pipe 2b is fixed to the upper surface of the corrugated steel plate 2a. Further, an electrical tray 2c and an air conditioning duct 2d are attached to the lower surface, and these are all assembled in advance in a workshop, factory, etc. other than the building under construction. Next, the building construction method of the present invention will be shown in order of steps with reference to FIGS. 4 to 7.

First, in FIG. 4, the wall reinforcement 3n is roughly raised from the already completed floor 13, concrete is poured using a formwork (not shown), and the side wall 3a is raised.

At this time, the side wall 3a is raised as the side wall 3b, for example, 1 to 2 meters above the level of the floor of the upper floor to be constructed. At the same time, inside the side wall 3a, a yoke reinforcing bar 3c, which is scheduled to be connected to the floor reinforcement on the upper floor, is provided at a corresponding position exposed from the concrete. Next, as shown in FIG. 5, a supporting hardware 3d is provided inside the side wall 3a at a lower level than the yoke reinforcing bar 3c.

Furthermore, a supporting hardware 3e is attached to the side wall 3b to support a scaffold form 3f for constructing an extension of the side wall 3b on the upper floor. At the same time, 3g of equipment is placed on the completed floor 13.
Carry in and hem. Next, as shown in Fig. 6, the support girder 3h is strung between the support metal fittings 3d,
The above-mentioned ceiling frame members 3i are sequentially loaded onto the ceiling frame members 3i using, for example, a crane. After loading, the adjacent ceiling frame village 3
Connect the electric toilet 2c, air conditioning duct 2d, and drain pipe 2b between the terminals i, and install the grounding wire 3i.
In addition, a stud port is welded to the support girder 3h in advance.
It penetrates through the ceiling frame section 3i. Next, ceiling frame member 3
Anchor ports 31 for fixing equipment placed on upper floors are attached to floor reinforcement 3k by connecting them to yoke reinforcing bars 3c on top of i.
Install. At the same time, the installation of the piping 3p to the device 3g and the erection of the side wall 3b are performed. Finally, as shown in Figure 7, 3 m of concrete is placed on top of the ceiling frame member 3i.
concrete and complete the floor 13 of the upper floor. After the curing period of 3 m of concrete has passed, the installation of the pipe 3q connecting to the pipe 3p, the conduit 3r, the cable 3s accommodated in the electrical tray 2c, etc. is carried out under the ceiling, that is, on the floor 1 of the upper floor.
Perform work related to the bottom surface of 3. At this time, the side wall 3b of the upper floor is raised above the level of the floor 13 to be constructed on the upper floor, exposing the reinforcing bar 3c. The upper floors will be constructed one by one by repeating the above process.

According to this embodiment, the ceiling frame member 3i can be manufactured in a well-equipped factory with good workability, which improves accuracy and improves the quality after completion. Since the construction can be carried out in duplicate, the construction period can be reduced by, for example, about five months.

In addition, since the support girder 3h can be used as an embedded metal fitting for installing the machine core, there is no need to re-harsh the concrete surface for installing the embedded metal fittings, and since welding heat does not act directly on the ceiling concrete surface, the concrete It can be expected to have effects such as ensuring quality and eliminating the need for painting repairs. In addition, it is possible to reduce or eliminate the need for construction scaffolding for equipment installed below the ceiling, which improves the safety of workers during vertical work, as well as increasing the freedom of transportation of materials and personnel on the floor. To increase. Note that the ceiling frame member 3i is made of corrugated steel plate 2.
Although the example in which a is used has been described, a flat plate may be used, or it may be made of wood or concrete.

In addition, although a case has been described in which a drain pipe 2b, an electric tray 2c, and an air conditioning duct 2d are installed, only the necessary items are installed according to the needs of the floor 13 including other equipment. Of course it's a good thing. Furthermore, although an example has been described in which the support hardware 3d is attached to the side wall 3a, the support of the support girder 3h is attached to the floor 1 along the side wall 3a.
3 may be replaced with an upright support, or both may be used in combination.

Further, although the present construction method has been explained by taking the construction of a nuclear reactor building as an example, it is of course possible to apply it to the construction of other buildings having a similar configuration.

〔Effect of the invention〕

As detailed above, according to the building construction method of the present invention,
At the same time, it increases structural precision and improves safety.
Since the construction processes that were previously performed in series can be parallelized, the building construction period can be significantly shortened.

Brief description of the drawings Figure 1 is a sectional view showing the schematic structure of the reactor building, Figure 2 is an enlarged sectional view of a part of Figure 1 to explain the construction method of the substructure; FIG. 3 is a perspective view showing a ceiling frame member applied to the present invention, and FIGS. 4 to 7 are sectional views sequentially showing the building construction method of the present invention.

3a... side wall, 3b... side wall, 3c... yoke reinforcing bar, 3d.
...Support hardware, 3h...Support girder, 3i.
...Ceiling frame members, 3k...Floor reinforcement, 3m
...Concrete, 13...Floor.

Figure 4 Figure 1 Figure 2 figure of job Figure 5 Figure 6 Figure 7

Claims (1)

[Scope of Claims] 1. In a building construction method in which the building is constructed from the lower floors to the upper floors, the side wall of the lower floor has yoke reinforcing bars protruding laterally at a position facing the floor reinforcement to be laid on the adjacent upper floor. shall be erected on the upper floor adjacent to the lower floor above the level of the floor section to be constructed, and shall be installed internally with a supporting surface at a position lower than the level of the yoke reinforcing bars of the side wall. A girder member is suspended horizontally, a pre-formed frame member is mounted on this girder member,
The above-mentioned floor reinforcement of the above-mentioned upper floor is laid by connecting it to the yoke reinforcing bars protruding from the upper part of this frame member, and then the floor concrete of the above-mentioned upper floor is poured, and the above-mentioned process is repeated until the upper floors are successively laid. A building construction method characterized by building up into floors. 2. The building construction method according to claim 1, wherein a pre-formed frame member with attached equipment and anchor bolts arranged above and below the floor is mounted on the girder member.