JP2022089706A - Building inside staircase preceding construction method - Google Patents

Abstract

To provide means for installing a permanent steel staircase preceding a construction of a frame structure of a building.SOLUTION: In a staircase preceding construction method for constructing the staircase to be installed inside of a building preceding a construction of an upper floor, a column material for staircase is prepared at the staircase installation location and a temporary column material is prepared at a location requiring no column material for staircase, a staircase receiving beam is mounted to the column material for staircase and the temporary column material and erected, and a steel staircase unit is mounted to construct the staircase inside of the building temporarily.SELECTED DRAWING: Figure 1

Description

The present invention relates to building technology.

In the building, columns and beams are built in advance, and then floors, walls, stairs, etc. are built.
Before the main stairs are installed, temporary stairs will be installed and work on the upper floors will be carried out.
If the main staircase is installed after the frame is completed, the steel-framed staircase unit that passes through the upper and lower floors will be carried in and installed in a narrow space, which will be a difficult construction work such as carrying-in work and alignment. When setting up temporary equipment, it is necessary to devise and arrange it in a narrow space, which requires skill and is difficult to install and remove.

For example, in Patent Document 1 (Japanese Unexamined Patent Publication No. 2018-21352), a staircase unit is temporarily installed in advance by passing a temporary columnar member through a landing of the staircase unit, and after the staircase unit is permanently installed, the columnar member is raised to the next. The staircase advance temporary construction method for temporarily constructing the staircase unit is disclosed. In this construction method, a hole for passing a columnar material is opened and closed in the staircase unit, and eight temporary columnar materials and a temporary receiving member that receives the tip of the staircase unit are removed.
In Patent Document 2 (Japanese Unexamined Patent Publication No. 2013-129961), at a construction site of a steel-framed staircase in a concrete structure, a steel-framed staircase carried into the site is set at a predetermined position, and the lower part of the steel-framed staircase is folded back. A temporary fixing method for supporting the landing area up and down is disclosed.

Japanese Unexamined Patent Publication No. 2018-21352 Japanese Unexamined Patent Publication No. 2013-129961

An object of the present invention is to develop a means for installing a main steel staircase prior to constructing a building frame.

The present inventor can temporarily install the main steel staircase unit prior to the frame of the building by using the pillar material of the stairs, so that the stairs can be installed without being restricted by the frame as compared with the case after the frame of the building is installed. It became possible to use the stairs that had been temporarily constructed in advance for raising and lowering workers, and it was possible to eliminate the need to install temporary stairs.
1. 1. It is a stairs precedent construction method in which the stairs installed inside the building are constructed prior to the construction of the upper floors.
Prepare stair pillars and temporary stairs where stair pillars are not required at the stairs installation location, attach the stair support to the stair pillars and temporary pillars, and install the steel stair unit. A staircase advance construction method characterized by temporarily constructing stairs inside the building.
2.1. Stairs advance construction process using the described stairs advance construction method,
Upper floor construction process to construct the upper floor part and the staircase frame around the stairs that was constructed in advance,
Construction process to connect the stairs constructed in advance to the frame and removal of temporary equipment, stairs main construction process,
A method of constructing stairs, which is characterized by performing.

1. 1. According to the present invention, when the stairs are constructed in advance, the main members can be used as the installation materials, so that the temporary materials can be reduced and the main stairs can be used for the work on the upper floor. , It was possible to eliminate the need for temporary stairs for moving workers. In particular, as the main material, a pillar material for stairs and a beam receiving beam, which are heavy objects and are the main members of stair processing, can be used.
2. 2. It was difficult to install temporary materials and it was difficult to bring in a large steel staircase unit to install the stairs in the limited staircase space after the frame was completed. In the invention, the stairs can be installed with the surroundings open, which facilitates the installation work.
3. 3. By constructing the stairs in advance, the construction of the rooftop floor will be quicker, and by closing the rooftop, it will be possible to work indoors without being affected by rainwater, so proceed with the construction systematically. It will be possible to complete the construction at an early stage.

Diagram showing the outline of the preceding stairs The figure which shows the stairs advance installation process The figure which shows the example of the stairs temporary apparatus The figure which shows the state which the stairs unit was temporarily installed The figure which shows the temporary state (including the assumed pillar) of the leading stairs from the opposite direction of FIG. Diagram showing an example of removal of temporary columns and connection to the building frame The figure which shows the finish situation after the stairs construction The figure which shows the example of the temporary pillar material

The present invention is a staircase-preceding construction method in which a steel-framed staircase provided inside a building is laid prior to the construction of the upper floor.
In the steel staircase, the front and rear ends of the steel staircase unit are placed on the receiving beam, and the left and right sides of the receiving beam are connected to the pillar material for the stairs or the building frame. In the present invention, a temporary pillar material is provided for the stairs at the portion where the receiving beam is connected to the building frame, while the pillar material for the stairs is used as it is to construct a structure for temporary stairs to be constructed in advance. A steel staircase unit is attached. Temporary pillars for stairs and pillars for stairs are equipped with temporary holders to support the temporary structure for stairs so that they do not fall over. After that, according to the progress of the construction around the stairs such as the upper floor, the frame around the staircase to fix the beam and the pillar material for the stairs to the skeleton side was constructed, the temporary materials such as the temporary copy were removed, and the stairs Will be installed permanently.
Since the stairs installed in advance can be used as elevating stairs to access the upper floors, it is possible to reduce the installation of temporary stairs for work.
In addition, when installing the stairs by post-construction, in order to construct the stairs in the space of the stairs room after the construction of the upper floor has progressed, it is necessary to install temporary materials in a narrow space, and there is a large steel staircase. It is also difficult to bring in the unit. However, in the present invention, since the stairs can be laid in a large space where the surrounding construction has not progressed, there are few restrictions on the installation work, and it is easy to carry in and install a large steel staircase unit. .. Further, since the pillar material for the stairs of the main construction is used for the preceding construction, the temporary material for the stairs installation can be reduced.
Since the temporary materials used are temporary pillar materials, temporary holdings, etc., it is easy to carry them upward when diverting them to the preliminary construction of the next stairs.

FIG. 1 shows a bird's-eye view of the preceding construction stairs.
Four pillars are provided to support the steel staircase unit 4 (4a, 4b). The staircase receiving beams 3 (3a, 3b) are provided on the left and right column members, and the tips of the steel frame staircase units 4 (4a, 4b) are placed on the staircase receiving beams. In the example of FIG. 1, of the four pillars, three pillars are staircase pillars (1a, 1b, 1c) for main installation, and the remaining one is temporary pillar 2. It is used. The staircase beam 3 mounted on the temporary column 2 is replaced with the column 5 of the skeleton, and then the temporary column 2 is removed.

Figure 2 shows the process of installing the stairs in advance.
As the first step, it is a step of preparing a temporary staircase device. Prepare pillars for stairs and auxiliary materials such as temporary pillars, beams, and temporary holdings. These materials are assembled as a temporary staircase device at the installation location of the stairs.
As the second step, the steel staircase unit is brought into the assembled staircase temporary device and attached to the receiving beam.
As the third process, the installed stairs will be used to proceed with the construction of the upper floors.
As the fourth step, the columns and beams on the upper floor are attached and the construction of the frame progresses, and after the frame around the staircase is completed, the receiving beams held in the temporary column material are replaced on the skeleton side. For other parts as well, remove the auxiliary materials such as temporary pillars and temporary holdings while making the necessary connections to the frame side of the main building in sequence. Of the removed materials, on the upper floors, the materials used for the pre-construction of the stairs will move to the upper floors.

An example of construction will be described with reference to FIGS. 3 to 5 according to the process.
This example shows an example in which one temporary column material is used, but the temporary column material is not limited to one, and is used at any time in a place where a receiving beam is connected to the skeleton side.

FIG. 3 shows a state in which the staircase temporary device is assembled.
Three pillar materials 1a, 1b, 1c for stairs, a staircase receiving beam 3, a temporary pillar material 2, a temporary holding 61, and a temporary connecting material 25 are prepared.
Three staircase pillars 1a, 1b, and 1c are erected at the place where the stairs are installed and where the original staircase pillars stand. Temporary pillar lumber 2 is erected to fix the receiving beam of the stairs to the pillar. Temporary copy 61 is provided at a necessary place on each pillar material for stairs and fixed to a floor slab or a beam. In the example of FIG. 3, a state in which two temporary holdings 61 and 61 open to the outside are provided on the pillar material 1c for stairs is shown. Since the pillar material for stairs is the pillar material of the main installation, the root can be fixed in the same manner as the main installation. The number of temporary pillars is not limited to one, and can be added as studs in the middle. For fixing the temporary pillar material, an anchor or the like can be provided on the slab for stability.
Receiving beams 3a and 3c are attached to the upper and lower parts of the staircase pillars 1a and 1b. In this example, the upper and lower floors are high and two landings are provided, so a two-tiered beam is provided.
A staircase receiving beam 3b is provided on the staircase pillar material 1c side, and the other end side is provided by the temporary pillar material 2. Further, a temporary connecting member 25 for maintaining a space is provided between the left and right staircase pillars 1c and the staircase pillars 1b, and between the staircase pillars 1a and the temporary pillars 2, and the load of the steel staircase unit is applied. It prevents it from being deformed. As a temporary reinforcement material, in addition to the temporary connecting material, necessary support work such as bracing will be adopted so that the advance construction of the stairs can be carried out safely.

After assembling the staircase temporary device in this way, the steel frame staircase units 4a, 4b, and 4c are carried in and attached to the staircase receiving beams 3a, 3b, and 3c. FIG. 4 shows a state in which the steel staircase unit is attached. In addition, in FIG. 4 or later, the temporary connecting material 25 is omitted.
Here, H-shaped steel is used for the pillar material for stairs and the beam for stairs, and the end portion of the beam for stairs is joined to the flange of the column material for stairs. Taking the pillar material 1c for stairs as an example, the temporary holder 61 is attached to the outer flange and the web of the H-shaped steel.

FIG. 5 illustrates the state of the staircase temporary device as seen from the opposite side of FIG.
A staircase beam 3b is provided between the staircase column 1c and the temporary column member 2, and the tip of the steel staircase unit 4b is mounted on the staircase beam 3b. Since the temporary column member 2 has a function of temporarily holding the staircase receiving beam 3b, it is formed to have a length corresponding to the height of the receiving beam. Since the temporary pillar member 2 is short, the temporary holder 61 is also attached at a low position.
One end of the staircase receiving beam 3b is fixed to the flange of the staircase pillar material 1c, and the other end side is held from below by the temporary beam receiving 21 provided overhanging from the temporary pillar material 2. The other end of the staircase beam 3b is in a free state and will be fixed to the pillar 5 to be completed in the future.

FIG. 6 shows a state in which the structural column 5 of the skeleton is completed on the temporary column 2 side, and the other end of the staircase receiving beam 3b is fixed to the completed column 5 to form the temporary column 2. The removed state is shown in (b). This column is made of, for example, reinforced concrete (RC).
In this figure, the state of the upper end of the pillar material for stairs is omitted, but it will be fixed to the lower side of the beam on the upper floor as the construction on the upper floor progresses.

For the installation work of the stairs shown in FIGS. 3 to 6, the work space around the staircase on the reference floor to be installed can be widened, and a long steel staircase unit with both ends of the landing attached should be carried in and installed. Can be easily done. Further, in this example, the main members to be removed are about one short temporary pillar member, seven temporary holders, and two temporary connecting members. Since these materials are separated, they can be easily relocated even when they are used for the pre-construction of the upper stairs.
In addition, in order to use the installed stairs for raising and lowering for construction, a handrail will be installed in the temporary construction and it will be cured.

FIG. 7 shows the state of the construction site where the construction around the stairs on the upper floor is progressing and the upper end of the pillar material 1 for the stairs is fixed to the lower surface of the beam on the upper floor. In this construction, the walls around the stairs have not been installed yet, so it is shown that the construction of the stairs can be done easily.

FIG. 8 shows some examples of the temporary column member 2.
The temporary column member 2 is prepared to a required length according to the height of the staircase beam 3.
(A) shows a short example. The temporary lumber is constructed by using the temporary lumber 2, the temporary holder 61, and the temporary beam receiver 21 having a length provided at the height of the intermediate landing. An anchor or the like is installed at a place (slab or beam) where the temporary column material is installed, and the temporary column material 2 is erected using H-shaped steel or the like. The temporary holder 61 is diagonally attached to the temporary pillar member 2 to fix the base end of the slab or the like. Anchors and the like will be installed at the installation location of the temporary copy 61 as necessary. A temporary beam receiver 21 is provided at a height that supports the staircase beam 3. In the case of H-shaped steel, the temporary beam receiver 21 is attached to the flange side by welding or bolts.
The staircase beam 3 is placed on the temporary beam receiver 21 and temporarily fixed by bolting or the like. The tip of the steel frame staircase unit 4 is hung on the staircase beam 3.
(B) shows a temporary pillar member 2 having a length corresponding to a normal floor height. The basic structure is the same as in (a). (C) shows a long type temporary column member 2 in which the temporary beam receiver 21 is provided in two upper and lower stages. This is an example of a high-floor place where two or more intermediate landings are provided.

1 Pillar material for stairs 2 Temporary pillar material 21 Temporary beam receiver 25 Temporary connecting material 3 Stair receiving beam 4 Steel staircase unit 5 Pillar 61 Temporary copy

Claims (2)

It is a stairs precedent construction method in which the stairs installed inside the building are constructed prior to the construction of the upper floors.
Prepare stair pillars and temporary stairs where stair pillars are not required at the stairs installation location, attach the stair support to the stair pillars and temporary pillars, and install the steel stair unit. A staircase advance construction method characterized by temporarily constructing stairs inside the building. The stairs advance construction process using the stairs advance construction method according to claim 1.
Upper floor construction process to construct the upper floor part and the staircase frame around the stairs that was constructed in advance,
Construction process to connect the stairs constructed in advance to the frame and removal of temporary equipment, stairs main construction process,
A method of constructing stairs, which is characterized by performing.

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