JP2005030034A - Stairs structure and construction method of stairs structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely shorten work time, by reducing finishing work and assembling work. <P>SOLUTION: After obliquely arranging a slab form 1 for stairs, stairs reinforcements 2 are arranged on an upper surface of the slab form 1 for stairs. Next, a stairs form 10 is arranged on the slab form 1 for stairs and the stairs reinforcements 2. Then, the slab form 1 for stairs and the stairs form 10 are connected by a first connecting member 20 and a second connecting member 25. Afterwards, concrete 35 is filled from at least any one of a landing of a stairs structure or a side surface of the stairs form 10. After confirming a filling condition of the concrete 35 from a plurality of concrete filling inspection holes 18 bored in a stepped board 12 of the stairs form 10, the second connecting member 25 is disassembled. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a staircase structure in a reinforced concrete building and a construction method of the staircase structure.
[0002]
[Prior art]
As a conventional staircase structure, for example, as shown in Japanese Patent No. 2535256, an oblique staircase slab form, a staircase reinforcing bar arranged on the upper surface of the staircase slab form, and a staircase slab 2. Description of the Related Art There is a known structure composed of an embedded metal lath staircase form placed on a formwork and a staircase reinforcing bar, a stair slab formwork, and concrete filled between the staircase formwork.
[0003]
And, by installing a metal lath staircase form that has been pre-processed at the factory on the staircase reinforcement, it is possible to shorten the installation work of the staircase form and smooth out the concrete leached from the mesh of the staircase formwork. Therefore, the work time required for surface finishing of the staircase formwork is shortened, and the entire construction period is shortened.
[0004]
As another conventional staircase structure, as shown in Japanese Patent Laid-Open No. 11-270090, a staircase slab mold frame provided obliquely, a staircase reinforcing bar arranged on the upper surface of the staircase slab mold frame, and It is well known that it is composed of a staircase mold disposed on the staircase slab mold and the staircase reinforcing bar, and a concrete filled between the staircase slab mold and the staircase mold.
[0005]
The staircase formwork is assembled by connecting a plurality of one-step staircase components, each of which is a stepboard formed with a concrete filling port and a kick plate. Further, each staircase component is fixed to a staircase wall form by a fixing bracket (not shown).
[0006]
And the concrete is filled from the concrete filling port of the step board of each staircase component, and the construction period is shortened by fixing each staircase component.
[0007]
[Problems to be solved by the invention]
However, in the former case, the surface finishing process of the staircase form for smoothing the concrete leached out from the mesh of the metal lath staircase form is required, so that there is a problem that it takes time for the work.
[0008]
In the latter case, since it is necessary to assemble a plurality of staircase components on site, there is a problem that the assembling work takes time. And since concrete is filled from the concrete filling port of the step board of a staircase component, concrete will adhere to the upper surface of a step board, and the finishing operation | work will be added.
[0009]
By the way, the conventional staircase structure described above is composed of a slab mold for staircases, a staircase reinforcing bar, and a staircase mold in any case, but as shown in Japanese Patent No. 3196043, a reinforced concrete frame As a staircase structure that is constructed prior to, a staircase wall formwork that forms a staircase and a staircase formwork having a girder provided with a plurality of staircase wall hanging brackets Things are known. In this case, since the staircase structure is constructed prior to the reinforced concrete frame, the strength of the reinforced concrete frame as a whole is not taken into consideration. 11-270090) has a different structure. Therefore, the staircase form shown in Japanese Patent No. 3196043 cannot be easily applied to staircase structures having different structures (Japanese Patent No. 2535256 and Japanese Patent Laid-Open No. 11-270090).
[0010]
Then, in view of the said problem, this invention aims at providing the construction method of the staircase structure and staircase structure which can reduce finishing work and an assembly work, and can shorten work time reliably.
[0011]
[Means for Solving the Problems]
In order to solve the above-described problems, a staircase structure according to the present invention includes, as shown in claim 1, a staircase slab form that is obliquely provided, and staircase reinforcing bars arranged on the upper surface of the staircase slab form. In the staircase structure composed of the staircase form placed on the staircase slab formwork and the staircase reinforcing bar, and the concrete filled between the staircase slab formwork and the staircase formwork, the staircase formwork is The step board and the kick board are alternately arranged and integrated, and the step board of the staircase form has a plurality of concrete filling inspection holes, and each concrete filling inspection hole is attached and detached. It is sealed by a possible lid or mortar.
[0012]
Therefore, it is only necessary to install the staircase formwork on the staircase reinforcing bars, and the assembly of the staircase formwork at the site becomes unnecessary, and the assembly work process becomes unnecessary. Furthermore, for example, if concrete is filled between the staircase slab formwork and the staircase formwork from the side of the staircase formwork, the concrete will not adhere to the upper surface of the staircase formwork board, and the surface of the stepboard form No need for finishing. Therefore, the construction period can be shortened reliably. In addition, since the filled concrete can be inspected from the concrete filling inspection hole of the corrugated board, the staircase formwork can be fixed securely.
[0013]
According to a second aspect of the present invention, drainage grooves are formed at both ends of the step plate of the staircase mold frame, respectively, and a water gradient to at least one of the drainage groove of the step plate or the step nose of the step plate is provided. It is formed on the step plate of the formwork, and a non-slip is provided on the nose of the step plate.
[0014]
Then, after constructing the staircase structure, it is not necessary to form a slip stopper or a water gradient on the step board, so that the working efficiency is further improved.
[0015]
Furthermore, as shown in claim 3, the stair slab mold and the stair mold are connected and integrated.
[0016]
In this case, by connecting and integrating the stair slab formwork and the staircase formwork, the operator can pass without filling the concrete. Furthermore, by connecting and integrating the stair slab formwork and the staircase formwork, the staircase formwork is not pushed up by the filling pressure of the concrete, and is securely fixed.
[0017]
Further, in the construction method of the staircase structure of the present invention, as shown in claim 4, after the slab formwork for staircase is obliquely arranged, staircase reinforcing bars are arranged on the upper surface of the slab formwork for staircase, A staircase form is placed on the staircase slab formwork and staircase reinforcing bar, and then the staircase slab formwork and the staircase formwork are connected by a connecting member, and then the landing of the staircase structure or the staircase form Concrete is filled from at least one of the side surfaces of the frame, and the concrete filling degree is confirmed from a plurality of concrete filling inspection holes formed in the step plate of the staircase mold.
[0018]
Therefore, the assembling work of the staircase formwork, the demolding work of the staircase formwork, and the finishing work in the conventional staircase construction are not required, and the working time can be surely shortened.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS.
The staircase structure of the present invention includes a staircase slab mold frame 1 that is obliquely arranged, a staircase reinforcing bar 2 that is arranged on the upper surface of the staircase slab mold frame 1, a staircase slab mold frame 1, and a staircase reinforcing bar 2. It is composed of a staircase mold 10 disposed above, a stair slab mold 1 and a connecting means for the stair mold 10, and a concrete 35 filled between the stair slab mold 1 and the staircase 10. ing.
[0020]
The staircase reinforcing bars 2 have lower end bars 3,..., Which are arranged in parallel along the inclined surface of the stair slab formwork 1 at predetermined intervals, and lower ends of the lower end bars 3,. Spiral muscle 4, fixed to streaks 3, ..., sparrow muscle 4, ... Step retainer 5 fixed to the base end of each step, and sparrow muscle 4, ... distal end of each step The main muscles 6 are fixed to the (nosing).
[0021]
Further, the staircase reinforcing bar 2 includes an annular interval holding member 7 for securing a distance between the splint bars 4,... And the main reinforcing bars 6,. Are provided along the main muscles 6.
[0022]
The staircase mold 10 includes inclined girders 11 and 11 disposed on both left and right sides, a plurality of horizontal step plates 12 provided between the two inclined girders 11 and 11, and each step plate 12. ,... And vertical kick plates 13,.
And the thickness of the step board 12, ... of the staircase form 10, and the kick board 13, ... is about 5 mm-20 mm, and is thin. Furthermore, the staircase form 10 is formed of a cement-based or resin material.
[0023]
The upper sides of the inclined girders 11 and 11 are an upper extending portion 11a extending from the side end portion of the uppermost kick plate 13, an inclined portion 11b inclined downward from the upper extending portion 11a, and an uppermost portion. A lower extending portion (not shown) extending from a side end portion of the lower step plate 12.
The lower side of each step plate 12,... And each kick plate 13, according to the shape of the sparrow formed by the side end portion of each step plate 12,. It is integrated with ...
[0024]
Further, drainage grooves 15 are formed at the left and right end portions of each step plate 12,... And each kick plate 13,. It is formed to match the shape of the rod. In addition, water gradients 16 and 16 are formed that gently descend and incline from the central portion of each step plate 12 to both drain grooves 15 and 15 in order to drain into the left and right drain grooves 15 and 15 of the step plate 12. . In addition, a plurality of protruding slips 17 formed along the longitudinal direction of the step plate 12 are formed at the tip of the step plate 12.
[0025]
Further, a plurality of concrete filling inspection holes 18 filled between the reinforcing bars and the staircase mold 10 are formed in the rear of the anti-slip 17 of the step plate 12 along the longitudinal direction of the step plate 12. Has been. Each of the concrete filling inspection holes 18,... Is sealed by a lid body 19,... And a packing 19a,. Furthermore, the level | step difference of the cover body 19 ... and the step board 12, ... is a level | step difference of the grade which does not cause trouble when a person raises / lowers a staircase structure.
[0026]
The connecting means includes a first connecting member 20 and a second connecting member 25. The first connecting member 20 includes a large connector 21, which is welded to the back surface of each step plate 12, ..., a small connector 22, which is welded to the upper surface of the stair slab mold 1, and both connectors. Are provided with short bolts 23 for connecting and fixing 21,..., 22,. The second connecting member 25 is a distance between the through hole 26 formed in the boundary portion between each step plate 12, ... and the kick plate 13, ..., and the staircase mold 10 and the stair slab mold 1. .., A substantially conical bushing 31 fixed to the outer surface of the through hole 26, and the long slab mold 1 and the staircase mold 10. And bolts 29,... And nuts 30,.
[0027]
And the concrete 35 is filled from the side of the staircase landing or the staircase formwork 10. Further, on both sides of the staircase mold 10, a staircase wall mold (not shown) is erected.
[0028]
Next, the construction procedure of the staircase structure will be described. First, after stair slab formwork 1 is installed obliquely, staircase reinforcing bars 2 are arranged on the upper surface of staircase slab formwork 1. At this time, the staircase reinforcing bar 2 is connected to the reinforcing bar of the reinforced concrete frame by a binding line (not shown).
[0029]
Next, the staircase form 10 is disposed on the staircase slab formwork 1 and the staircase reinforcement 2. At this time, the inner surface of the staircase form 10 is brought into contact with the interval holding members 7 of the staircase reinforcing bar 2, and the distance (covering amount) between the staircase reinforcing bar 2 and the staircase formwork 10 is secured by the interval holding members 7. .
[0030]
Subsequently, the staircase slab mold 1 and the staircase mold 10 are aligned. That is, the large connectors 21 of the staircase mold 10 and the small connectors 22 of the staircase slab mold 1 are brought into contact with each other, and the spacer is interposed between the staircase mold 10 and the staircase slab mold 1. 28, ... are provided.
[0031]
Then, the large couplers 21,... And the small couplers 22,... Are connected and fixed with the short bolts 23,... And the nuts 30, and the long bolts 29,. .. Are inserted into the bushings 31,... And the stair slab mold 1 and the staircase mold 10 are connected and fixed by long bolts 29,.
[0032]
Next, the concrete 35 is filled from at least one of the landing of the staircase structure or the side surface of the staircase form 10. Then, the degree of filling of the concrete 35 from the plurality of concrete filling inspection holes 18 formed in each step plate 12 of the staircase form 10, that is, the concrete 35 between the staircase reinforcing bar 2 and the staircase form 10. It is confirmed whether or not is filled substantially uniformly.
[0033]
After the confirmation, the concrete filling inspection holes 18,... Of the staircase form 10 are sealed with the lids 19,. Then, the concrete 35 is left until it is solidified. After the concrete 35 is solidified, the nuts 30 of the second connecting member 25 are loosened, the long bolts 29 are extracted, and the bushings 31,. The insertion hole is filled with mortar (not shown) to complete the staircase structure. The first connecting member 20 is embedded with concrete 35. By completing this staircase structure, the building strength of the entire reinforced concrete structure is secured.
[0034]
In the completed staircase structure, the step plates 12,..., And the kick plates 13,... Of the fixed staircase form 10 are exposed, and the demolding operation of the staircase form 10 and the staircase type are performed. Finishing work on the upper surfaces of the step plates 12,.
[0035]
In the case of the above embodiment, the water gradients 16 and 16 are gently inclined downward from the central portion of the step plate 12 to the left and right drain grooves 15 and 15, but can also be drained to the tip portion (step nose) of the step plate 12. As described above, the water gradient 16 may be gradually inclined downward from the proximal end portion of the step plate 12 to the distal end portion (nosing) side. In short, the water gradient 16 may be drained to at least one of the left side, the right side, and the tip of the step board 12.
[0036]
Moreover, in the case of the said embodiment, after connecting the staircase slab formwork 1 and the staircase formwork 10, the concrete 35 was filled, but only by connecting the staircase slab formwork 1 and the staircase formwork 10, Workers can walk well.
[0037]
Furthermore, in the case of the said embodiment, although the staircase form 10 was connected and fixed to the slab formwork 1 for steps, you may make it connect and fix to a staircase wall formwork.
[0038]
In addition, the inclined girders 11 and 11 of the staircase form 10 are not essential requirements, and may be unnecessary depending on the installation location. However, when a staircase formwork is required, it is necessary to finish the staircase wall B. Therefore, it is preferable to use the staircase formwork 10 in which the inclined girders 11 and 11 are integrated. Get better. The inclined frames 11 and 11 may be either a girder or a side girder.
[0039]
Moreover, in the case of the said embodiment, although the staircase form 10 and the slab formwork 1 for steps which have the 1st connection member 20 and the 2nd connection member 25 were used, the 1st connection member 20 and the 2nd connection member 25 are already provided. It may be provided in the slab mold for stairs and connected to the stairs mold 10.
[0040]
Furthermore, in the case of the said embodiment, although the couplers 21 and 22 of the 1st connection member 20 were welded to the staircase form 10, you may make it form integrally with the staircase form 10. FIG.
[0041]
In addition, in the case of the above embodiment, the concrete filling inspection holes 18,... Of the staircase form 10 are sealed by the lids 19,. However, the mortar is filled into the concrete filling inspection holes 18,. The inspection holes 18 may be sealed.
[0042]
In the above embodiment, the staircase walls B are erected on both sides of the staircase form 10, but handrails may be attached to at least one of both sides of the staircase form 10. In this case, the handrail may be integrally formed with the staircase form 10 or may be attached separately.
[0043]
【The invention's effect】
As described above, according to the staircase structure of the present invention, since the staircase form in which the step board and the kick board are alternately arranged and integrated is used, the assembly work of the staircase formwork at the site is performed. Is no longer necessary.
[0044]
Furthermore, since the step plate of the staircase mold has a plurality of concrete filling inspection holes, the concrete filled between the staircase slab mold and the staircase mold can be filled substantially uniformly. is there.
[0045]
In addition, since the filling of the concrete is only between the slab formwork for staircase and the staircase formwork, the finishing work of the step plate and the kick plate of the staircase form becomes unnecessary.
[0046]
Also, drainage treatment and safety can be ensured by forming drainage grooves and water gradients in the stepped plate of the staircase form, and providing anti-slip in the nose of the stepboard.
[0047]
Furthermore, since the stair slab form and the stair form are connected and integrated, it is effective to secure the passage of the operator and the fixing strength of the stair form.
[Brief description of the drawings]
FIG. 1 is a completed schematic perspective view of a staircase structure according to the present invention.
FIG. 2 is a cut front view of a staircase structure before filling concrete.
FIG. 3 is a side sectional view of a staircase structure before filling concrete.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Slab formwork 2 for staircases Reinforcing bar 3 Lower end reinforcement 4 Inazuma muscle 5 Step pusher bar 6 Main reinforcement 7 Space holding member 10 Stair formwork 11 Inclined girder 11a Inclined part 11b Inclined part 12 Step board 13 Kick board 15 Drainage Groove 16 Water gradient 17 Non-slip 18 Concrete filling inspection hole 19 Lid 19a Packing 20 First connection member 21 Large connection tool 22 Small connection tool 23, 30 Bolt 25 Second connection member 26 Through hole 28 Spacer 29 Bushing 30 Nut 31 Bushing 35 Concrete B Staircase wall

Claims (4)

Staircase slab formwork installed obliquely, staircase reinforcing bars arranged on the upper surface of the staircase slab formwork, staircase formwork placed on the staircase slab formwork and staircase reinforcement, and staircase slabs In a staircase structure comprising a mold and concrete filled between the staircase molds, the staircase molds are integrated by alternately arranging stepboards and kick boards, and the staircase molds The step board is provided with a plurality of concrete filling inspection holes, and each concrete filling inspection hole is sealed with a removable lid or mortar. The step plate of the staircase form has drain grooves at both ends thereof, and the step plate of the staircase form has a water drain to at least one of the drainage groove of the step plate or the nose of the step plate. The staircase structure according to claim 1, wherein a slope is formed, and in addition, a slipper is provided on the nose of the step board. The staircase structure according to claim 1 or 2, wherein the staircase slab form and the staircase form are connected and integrated. After the slab formwork for the staircase is obliquely arranged, the staircase reinforcement is arranged on the upper surface of the slab formwork for the staircase, and then the staircase formwork is arranged on the slab formwork for the staircase and the staircase reinforcement. The staircase slab formwork and the staircase formwork are connected by a connecting member, and then the concrete is filled from at least one of the landing stage of the staircase structure or the side surface of the staircase formwork, and the stepboard of the staircase formwork A method for constructing a staircase structure, characterized in that the degree of filling of concrete is confirmed from a plurality of concrete filling inspection holes drilled in.

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