JP2002227408A - Method for executing stair in building and rise directly used for its method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To construct stairs without assembling stair forms having a complicate structure and without skill, and to largely reduce construction cost as a whole by shortening workhours at a site and shortening the term of works in a method for executing stairs for a reinforced-concrete building. SOLUTION: Stair bottom forces 22 and stair reinforcements 26 on the bottom forces are assembled in a stair execution space S formed between mutually parallel left-right concrete walls 1 and 2, a plurality of separately manufactured rises 27 are fixed onto the concrete walls 1 and 2, concrete is poured to the stair reinforcements 26 and a stair bottom wall 28 is molded, and the stair bottom forces 22 are disassembled after the curing of the concrete.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing stairs in a reinforced concrete building and a riser plate used directly in the method.

[0002]

2. Description of the Related Art Conventionally, in the above-mentioned reinforced concrete building, a staircase portion is a staircase of a complicatedly assembled stair form as in the case of forming a concrete skeleton such as a pillar, a floor, a wall, etc., which forms a framework of the building. This is done by placing concrete in the molding space (book "Pictures for architectural construction", edited by Rigaku Corporation).

[0003]

However, since stairs have a complicated shape unlike pillars and walls, they are considered to be the most difficult parts to form and assemble in formwork. There is a problem that the installation of the frame and the installation of the rebar, as well as the work of holding the top of the step and the finishing work are troublesome and require skill, resulting in an increase in the construction cost. There is also a problem that deferral and deterioration of quality are caused.

The present invention has been made in view of such circumstances, and eliminates the need for a conventional complicatedly structured stair formwork, and furthermore, simplifies construction work and finishing work and solves all of the above problems. An object of the present invention is to provide a stair construction method for a simple building and a riser plate used directly in the method.

[0005]

In order to achieve the above-mentioned object, according to the first aspect of the present invention, there is provided a process for forming a stair construction space between mutually parallel left and right concrete walls formed by casting concrete. And a step of assembling a stair bottom frame in the stair construction space, further assembling a stair rebar on the stair bottom frame, and mounting a plurality of riser plates separately made in a factory or the like on the stair rebar between the concrete walls. A step of forming a stair bottom wall by pouring ready-mixed concrete from above into the stair rebar, a step of curing the concrete, and finishing a step surface; It is characterized by including a step of disassembling the bottom frame, and according to such a feature, it is not necessary to assemble a stair form having a complicated structure as in the past,
Stairs can be easily constructed even by non-skilled workers, and the finishing work is also easy, and it is possible to provide excellent stairs with good finish and quality. Since it is made, the working time on site is shortened, the construction period can be shortened, and the construction cost can be greatly reduced as a whole.

According to a second aspect of the present invention, in order to achieve the object, an anchor for fixing the riser plate to the left and right concrete walls when the left and right concrete walls are formed. According to such a feature, the same effect as that of the first aspect of the invention is exhibited, and in particular, the efficiency of fixing the riser plate to the left and right concrete walls is improved.

According to a third aspect of the present invention, there is provided a riser plate directly used in the method of constructing a staircase according to the first or second aspect, wherein the main body portion is made of concrete and rectangular. It is characterized by laminating finished plates such as tiles on the steps of it, and fixing the mounting plate to the concrete side wall on both end surfaces in the longitudinal direction. The board can be provided at low cost, and the work of fixing the riser board to the concrete wall is also very simple and easy.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below based on one embodiment of the present invention shown in the accompanying drawings.

FIG. 1 is a perspective view of a staircase made by the method of the present invention, FIG. 2 is a perspective view of a riser plate used for the staircase, and FIG. 3 is a riser plate along line 3-3 in FIG. Cross section of the
FIG. 4 is a perspective view of a wall formwork for constructing a concrete side wall, FIG. 5 is a partial sectional view taken along line 5-5 in FIG. 4, and FIG.
7 is a partial cross-sectional view along the line 6-6 in FIG. 4, FIG. 7 is a perspective view showing the construction process of the stairs, and FIG. 8 is a partial cross-sectional view along the line 8-8 in FIG.

[0010] When forming a frame portion such as a frame pillar, a frame wall, a floor slab and the like of a building with a mold, a stair construction space S
Then, the right and left concrete walls 1 and 2 on both sides thereof are formed. Concrete walls 1, 2 on the left and right
Is formed, a wall form M is assembled (see FIG. 4). Since the left and right concrete walls 1 and 2 are straight vertical walls, the assembling of the wall form M is simple and is performed by a conventionally known assembling method. That is, as shown in FIG. 4, in order to form the left and right concrete walls 1 and 2, there is a concrete casting space 3 having a predetermined width.
Assembling the inner and outer concrete panels (consisting of a plurality of concrete panels in one plane) 4, 5 in parallel with each other,
On the back of 5, a vertical pipe flap 6 and a double row horizontal pipe flap 7 are assembled vertically and horizontally, respectively. The inner and outer concrete panels 4 and 5 and the vertical and horizontal pipe flaps 6 and 7 are tied together by a plurality of tying members B as shown in FIG. The binding material B is a conventionally known binding material, and a foam tie 10,
Cone 11, separator 12, washer 13 and nut 1
6, inside and outside concrete panels 4, 5
In between, a foam tie 10 having cones 11 fixed at both ends is interposed to hold the space between the concrete panels 4 and 5, that is, the concrete casting space 3, and the vertical pipe flap 6 and the horizontal pipe flap 7 are separated. The inner ends of the separators 12 pierced through the through holes 13 and 14 formed in the inner concrete panel 4 or the outer concrete panel 5 are screwed into the cones 11 respectively, and further, the outer ends of the separators 12 Washer 1 to be engaged with horizontal pipe 7
When the nut 16 is screwed in via the nut 3, as shown in FIG.
That is, it is tied with the tying material B while the concrete casting space 3 exists.

As shown in FIG. 6, the concrete panel 4 on the inner side, that is, on the side facing the stair construction space S,
, A plurality of pairs of mounting holes 18 are formed by performing blackout in accordance with a fixed position of a riser plate 27 described later. And
In these mounting holes 18, screw portions 19 a of anchor bolts 19 as anchors are inserted into the concrete placing space 3.
The anchor bolt 19 is fixed to the inner concrete panel 4 by being inserted from the side and screwing a nut 20 to the outer end thereof. Then, the base portion of the anchor bolt 19, that is, the anchor portion 19b is located in the concrete placing space 3.

In the concrete casting space 3 formed by the wall form M, fresh concrete is cast. Then, when the molding of the left and right concrete walls 1 and 2 is completed by solidification of the concrete, the wall form M is dismantled.

As described above, on both sides of the stair construction space S,
The left and right concrete walls 1 and 2 are formed, and the base portion of the anchor bolt 19, that is, the anchor portion 19b is embedded and fixed to the inner concrete wall 2, and the screw portion 19a of the anchor bolt 19 is located inside the stair construction space S. It is projected to.

Next, a stair bottom frame 22 is assembled in the stair construction space S according to the inclination angle of the stairs. As shown in FIG. 7, the stair bottom frame 22 arranged at a predetermined inclination angle
Is supported by a plurality of pipe supports 23 via a flap 24.

Further, as shown in FIG.
On top, the arrangement of the reinforcing bars is determined according to the dimensions of the bottom wall 28 of the stairs, and the stair reinforcing bars 26 are assembled.

On the stair reinforcing bar 26, stairs are allocated to the left and right concrete walls 1 and 2, and a plurality of riser plates 27 are fixed to the left and right concrete walls 1 and 2 according to the allocation.

The kick-up plate 27 is a feature of this embodiment, and is separately manufactured at a factory other than a construction site. As shown in FIGS. It is made of concrete, has an inverted L-shaped cross section, and has a length that fits between the left and right concrete walls 1 and 2. A rectangular mounting plate 27b having a pair of mounting holes 27c is fixed to both end surfaces in the longitudinal direction of the main body portion 27a made of concrete. Further, the upper surface of the riser plate 17 which is a corner portion of the misalignment is formed in an uneven shape, and a finishing plate, for example, a non-slip tile 27d is integrally laminated in the concave portion. The front surface of the riser plate 27 is a riser surface.

The riser plate 27 configured as described above,
If the screw portion 19a is passed through the anchor bolt 19 through the mounting holes 27c of the left and right mounting plates 27b, and the nut 20 is screwed there, As shown in FIG. 8, the riser plate 27 can be fixed to the left and right concrete walls 1 and 2. As described above, the plurality of riser plates 27 are fixed to the left and right concrete walls 1 and 2 on the stair rebar 26 at predetermined vertical rise intervals.

Next, if ready-mixed concrete is poured into the step reinforcing bar 26 from above, the concrete is filled into the gaps between the step reinforcing bars 26 and solidified and hardened.
The stair bottom wall 28 is formed integrally with the plurality of riser plates 27 and the left and right concrete walls 1 and 2. The concrete to be poured is cured so that the conditions such as moisture and temperature are maintained so that the concrete is sufficiently hardened.
After that, the surface of the step is finished by ironing.

Finally, the stair bottom frame 22 is dismantled, and the construction of the stairs is completed.

As can be understood from the above steps, this stair construction method does not require assembling a stair form having a complicated structure as in the prior art, so that stairs can be easily constructed without a skilled worker. In addition, finishing work is also easy, and it is possible to provide excellent stairs with good finishing quality,
Since the riser plate 27 is made at a factory other than the construction site, the work time at the site is shortened, the construction period can be shortened, and the construction cost as a whole can be greatly reduced.

Although one embodiment of the present invention has been described above, the present invention is not limited to the embodiment, and various embodiments are possible within the scope of the present invention.

[0023]

As described above, according to the first aspect of the present invention, it is not necessary to assemble a stair form having a complicated structure as in the prior art. It is possible, and the finishing work is also easy, so that it is possible to provide excellent stairs with good finishing and quality. Also,
Since the riser is made at a factory other than the construction site,
The work time on site is shortened, the construction period can be shortened, and the construction cost as a whole can be greatly reduced.

According to the second aspect of the invention, the same effect as that of the first aspect of the invention is obtained, and in particular, the efficiency of fixing the riser plate to the left and right concrete walls is further improved.

Further, according to the third aspect of the present invention, it is possible to provide a riser plate having a good finish and excellent quality at a low cost, and the work of fixing the riser plate to a concrete wall is very simple and easy. Becomes

[Brief description of the drawings]

FIG. 1 is a perspective view of a staircase made by the method of the present invention.

FIG. 2 is a perspective view of a riser used for the stairs.

FIG. 3 is a sectional view of a riser plate taken along line 3-3 in FIG. 2;

FIG. 4 is a perspective view of an assembled formwork for constructing a concrete side wall.

FIG. 5 is a partial sectional view taken along line 5-5 in FIG. 4;

FIG. 6 is a partial sectional view taken along line 6-6 in FIG. 4;

FIG. 7 is a perspective view showing a construction process of the stairs.

FIG. 8 is a partial sectional view taken along line 8-8 in FIG. 7;

[Explanation of symbols]

 1 ... concrete wall 2 ... concrete wall 19 ... anchor (anchor bolt) 22 ... staircase bottom frame 26 stairs reinforcing bar 27 riser 27a body part 27b mounting plate 27d Finished plate (non-slip tile) 28 ........ Stair bottom wall S ........ Stair construction space

Claims (3)

[Claims] 1. A step of forming a stair construction space (S) between mutually parallel left and right concrete walls (1, 2) formed by casting concrete, and a step bottom in the stair construction space (S). Assemble the frame (22) and further reinforce the stairs reinforcing bar (26) on the stair bottom frame (22).
And mounting a plurality of risers (27) separately made in a factory or the like on the stair rebar (26) on the concrete wall (1, 1).
2) a step of allocating between the bridges and fixing the bridge; a step of pouring fresh concrete from above into the stair reinforcing bar (26) to form a stair bottom wall (28); And a step of disassembling the stair bottom frame (22). A stair construction method for a building, comprising: 2. An anchor (19) for fixing the riser plate (27) at the time of molding thereof is attached to the left and right concrete walls (1, 2).
The method for constructing a staircase in a building according to claim 1. 3. A riser plate (27) directly used in the method for constructing stairs according to claim 1 or 2, wherein a main body portion (27a) is formed in a rectangular shape by concrete, and a tile or the like is hard to step on. Characterized in that the finishing plate (27d) is laminated, and mounting plates (27b) for fixing to the concrete side walls (1, 2) are fixed to both longitudinal end surfaces thereof.