JP3944870B2 - Method for constructing staircase with staircase and unit staircase used in this construction method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for constructing a staircase having a staircase and a unit stair used for the construction method.
[0002]
[Prior art]
Conventionally, in the construction of staircases with staircases surrounded by concrete walls, a steel staircase with steps and necessary landings sandwiched between girders is fixed to the frame, then the inner frame for the staircase, After building the formwork and rebars, concrete was placed in both formwork and the stairs were built, and then both formwork were removed.
[0003]
Also, previously, the inner mold (discarded mold) fixed steel staircase comprising a wall, a method of fixing the skeleton are attempting et al.
[0004]
[Problems to be solved by the invention]
Among the prior arts, in the former case, there is a problem that the installation and removal work of the formwork becomes complicated.
[0005]
In addition, when fixing a steel staircase to a housing, it is necessary to construct a staircase for each predetermined floor according to the construction of the housing, and when building a staircase separated from the housing or preceding the housing A special jig was required.
[0006]
[Means for Solving the Problems]
However, the present invention solves the above-mentioned problems because it uses a self-supporting inner mold.
[0007]
That is, the present invention is a steel plate for an inner mold for building a staircase wall made of concrete on a temporary mount, and forms a wall panel of a predetermined height to which a support is attached in advance. Assemble and configure the inner mold frame of the staircase wall that can stand by itself , construct a scaffolding plate on the receiver , configure a unit staircase with a predetermined unit of stair member in the inner mold frame, and then, Remove the scaffolding plate from the receiver, lift the unit staircase with a crane, transfer it from the temporary mount to the planned staircase construction position, stack the unit staircase sequentially, and connect the upper and lower unit staircases Subsequently, constructing a predetermined structural reinforcing bar and an outer mold frame on the outer periphery of the inner mold frame, placing concrete in both mold frames, and embedding the receiving device to construct a staircase wall. It is a construction method of the characteristic staircase.
[0008]
In addition, the steel plate for the inner formwork for building the staircase wall made of concrete, forming the inner formwork of the staircase wall , and forming a wall panel of a predetermined height to which the support is attached in advance , and erection scaffolding plate to said receptacle, by assembling said wall panels by stairs planned installation position, constitute an inner formwork independence can stairwell wall and interior stairs member of a predetermined unit in the inner formwork The unit staircase is constructed, and the inner formwork and the staircase member are sequentially placed and stacked, and then a predetermined structural reinforcing bar and an outer formwork are constructed on the outer periphery of the staircase interior formwork. A method for constructing a staircase, characterized in that concrete is placed and a wall of a staircase is constructed by embedding the receptacle .
[0009]
Further, in the above, a bracket for receiving a staircase member is attached in advance to the inner surface of the wall panel, and the fixing position of the bracket is a position other than the upper and lower connecting positions of the wall panel, and the step board and landing of the staircase member Is a construction method of stairs set so that is arranged at a predetermined height .
[0010]
Furthermore, it is a planar shape along the inner surface of the staircase to be constructed, and constitutes an inner mold frame for the wall that can be self-supporting made of steel plates opened up and down, and a connecting rib for connection is formed on the lower edge of the inner mold frame And forming a predetermined unit of staircase member inside the inner mold for the wall ,
A bracket for receiving a staircase member is attached in advance to the inner surface of the wall panel, and the fixing position of the bracket is a position other than the upper and lower connection positions of the wall panel, and the step board and landing for the staircase member to be installed It is set so that it may be arrange | positioned with predetermined height, Furthermore, the said wall panel is a unit staircase characterized by attaching the receiving device which can construct | assemble a scaffold and can be embed | buried in a staircase wall on the outer surface .
[0011]
The above-mentioned staircase member is usually a steel staircase, and is configured by sandwiching a predetermined number of steps (steel plate or cement) with steel plate girder.
[0012]
The predetermined unit of the stair member in the above refers to a stair member composed of one unit or a plurality of units, wherein a single unit of stair member is composed of a predetermined number of step board members that can be connected to the landing and a necessary landing.
[0013]
The formwork for the staircase wall that can stand by itself is a state in which the wall panel is assembled as the staircase wall, and does not require any special means for supporting the load of the wall panel and the staircase member. A structure that can stand on its own with support. For example, although it depends on the area of the staircase, a steel plate having a thickness of about 4.5 to 9.0 mm is used, and if necessary, a reinforcing material such as a rib is applied to constitute the wall panel.
[0014]
Embodiment
A steel plate for an inner mold for building a staircase wall made of concrete, and a wall panel having a predetermined height constituting the inner mold of the staircase wall is formed. Assemble the wall panel at a predetermined position in the construction site to configure the inner mold frame of the staircase wall that can stand on its own. Configure. Unit stairs are placed and stacked sequentially at the stairs construction position, and unit stairs are connected to each other. Subsequently, a predetermined structural reinforcing bar and an outer mold are constructed on the outer periphery of the inner mold, and concrete is placed in both molds. After the concrete has solidified, unnecessary temporary objects are removed to construct a staircase wall with stairs.
[0015]
This wall panel can increase the strength to withstand the side pressure of concrete compared to the form constructed by the conventional technology, so the floor height is high and the wall thickness of the staircase for radioactivity related facilities is thick. It is particularly effective in construction. It is also effective in special facilities where the floor height of each floor is not constant.
[0016]
[Action]
Since the staircase member is built in the inner mold to form the unit staircase, the inner moldwork and the staircase of the staircase can be constructed at the same time by stacking unit staircases. Further, since the staircase member is fixed to the inner mold of the staircase wall, the fixing work between the frame and the staircase can be omitted. Further, since the inner formwork of the staircase wall can be self-supporting, a staircase with a staircase can be arbitrarily constructed prior to the construction of the housing.
[0017]
If the bracket is attached to the wall panel in advance, the positioning and connecting operations of the inner mold and the staircase member are simplified. Further, if a wall panel to which a scaffolding plate support is attached is used, the scaffolding can be erected on the support and the unit stair stacking operation can be carried out safely.
[0018]
[Example 1]
Embodiments of the present invention will be described with reference to the drawings.
[0019]
[Configuration of inner form for staircase wall]
An inner mold frame 20 for a staircase wall used in the practice of the present invention comprises a plurality of wall panels 1 and 1. The wall panel 1 is arranged and connected in accordance with the plan shape of the staircase to be constructed to constitute one unit of a rectangular tube shape opened up and down. The inner unit frame 20 is configured by stacking up and down one unit of the connected single unit or a predetermined level (FIGS. 2, 3, and 4).
[0020]
The wall panel 1 used for the Example of this invention is a product made from a steel plate, and the joining ribs 4 and 4 for reinforcement | strengthening and connection are formed over the full length in the four periphery. Further, horizontal ribs 5 and 5 are formed on one surface (outer surface) 2 of the wall panel 1 in parallel in the horizontal direction at a predetermined interval (about 450 mm), and in the vertical direction, between the horizontal ribs 5 and 5. The vertical ribs 6 and 6 are formed at predetermined intervals (about 450 mm), and the vertical and horizontal ribs 5 and 6 form lattice-like ribs (FIG. 3). Further, through holes 7 are formed in the lateral rib 5 in parallel in the length direction. Further, since the inner mold frame 20 includes the wall panels 1 and 1 having the bonding ribs 4 on the upper and lower sides, the bonding ribs 4 for bonding the upper and lower inner mold frames 20 and 20 on the upper and lower sides of the inner mold frame 20, respectively. 4 is always formed.
[0021]
Further, brackets 9 and 9 for fixing the steel steps are fixed to the other surface (inner surface) 3 of the wall panel 1 arranged at the support position of the steel steps (step members). Reinforcing plates 10 and 10 are fixed to both surfaces 2 and 3 of the wall panel 1 around the mounting position of the bracket 9 (FIGS. 5A and 5B).
[0022]
The brackets 9 and 9 are fixed at a predetermined height so that the bracket 9 is not positioned at the upper and lower ends of the wall panel 1 (the connection position of the upper and lower wall panels 1 and 1), and the treads and landings of the steel steps are at a predetermined height. It is the position where it is arranged. Moreover, the height of the wall panel 1 and the structure of the steel frame staircase are determined so as to be in such a position.
[0023]
Further, a scaffold receiving tool 16 is attached to one surface 2 of the wall panel 1 arranged at the work scaffold erection position (FIGS. 2 and 4). The receiving member 16 is a reinforcing diagonal member in which a base end portion 12 of a horizontal member 11 is attached to a receiving plate 17 fixed to a horizontal rib 5 of the wall panel 1 with bolts and nuts, and is fixed to a distal end portion 12a of the horizontal member 11. 13 is fixed to the lower lateral rib 5 and a handrail pillar 15 is fixed to the front end 12a of the horizontal member 11. A through-hole 18 for attaching a handrail (or rope) is formed in the upper end portion of the column member 15. Further, the receiving plate 17 to which the horizontal member 11 is attached is sandwiched and attached between the angle member 17a fixed to the one surface 2 of the wall panel 1 and the lateral rib 5 (FIGS. 6A and 6B). ).
[0024]
Further, here, the receivers 16 and 16 are attached to the two opposite surfaces of the inner mold 20 (FIG. 7A and FIG. 2), but the receivers 16 and 16 can also be attached to the three surfaces (FIG. 7). 7 (b)). Further, the receiver 16 can be attached to one or four sides, or the receiver 16 can be omitted (not shown).
[0025]
When a staircase in which the beam 36 protrudes in the staircase is constructed (FIG. 8 (a)), an inner frame 38 in which the wall panel 1 having a shape having a cut portion 37 along the protruding beam is disposed. Used (FIG. 8B). When the columns 39 and 39 protrude into the staircase (FIG. 9 (a)), the inner mold frame including the wall panels 1 and 1 having the cut portions 40 and 40 along the protruding column portion. 41 is used (FIG. 9B). Further, in the portion having the opening 42 such as the entrance / exit in the staircase (FIG. 10 (a)), the inner mold 43 comprising the wall panel 1 having the opening 42 is used accordingly (FIG. 10 (b)). . In addition, it will be an internal mold with a structure that matches the shape of the planned staircase. In these cases, the wall panel 1 is processed in advance according to the inner mold frames 38, 41, and 43 to be formed.
[0026]
[Configuration of staircase members]
Further, a steel staircase (step member) 22 used in the practice of the present invention is configured by placing landing strips 24a and 24a in parallel above and below a predetermined number of steps 23 and 23, and fixing both sides with spar 25 and 25. (FIG. 2). When the steel steps 22, 22 are constructed in the inner mold 1, a landing 24 is configured from the adjacent landing pieces 24 a, 24 a of the adjacent steel steps 22, 22 (FIG. 2).
[0027]
The structure of the steel staircase 22 is not limited to the above example, and may be divided into landings 24, 24 having a saddle girder and step parts 26, 26 in which the treads 23, 23 are fixed by the girder 25, 25. Yes (FIG. 11). In addition, it can be a steel step with various structures that are usually used (not shown).
[0028]
[Construction of stairs]
(1) At the assembly position, the shape steel is assembled to construct a temporary mount 28 having a height H (about 1 m) (FIG. 1 (a)). The height H is at least longer than the length H1 (FIG. 1 (d)) of the downward projecting portion 22a of the steel step 22.
[0029]
(2) On the temporary mount 28, the wall panels 1 and 1 having a structure corresponding to the staircase to be built are assembled, and the inner mold 20 of the staircase wall having a predetermined height is constructed. The wall panels 1 and 1 are formed so that the ribs 4 and 5 are located outside (the bracket 9 is inside) (FIG. 1B). At this time, the scaffolding plates 19 and 19 can be erected on the receivers 16 and 16 (FIGS. 6 and 7A), and the temporary structures for the surrounding scaffolding can be greatly reduced.
[0030]
(3) The steel steps 22 and 22 are inserted into the inner mold frame 20 from above (FIG. 1 (b)), and the spar 25 of the steel steps 22 is fixed to the bracket 9 to constitute the unit steps 30. (FIG. 1 (c)).
[0031]
(4) The scaffolding plates 19 and 19 are removed from the receivers 16 and 16, and the unit staircase 30 is lifted by a crane and transferred from the temporary mount 28 to a predetermined staircase construction position (FIG. 1 (d)). At this time, in the unit staircase 30, the lower end portion 22a of the steel staircase protrudes from the lower side of the inner mold frame. , 32.
[0032]
(5) The unit staircase 30 is removed from the temporary suspension members 32 and 33 and placed on the existing unit staircase 30a installed at the predetermined staircase construction position (FIG. 1 (d)). The inner mold 20a of the existing unit staircase 30a below and the inner mold 20 of the newly stacked unit staircase 30 are connected, and the spar 25 of the lower end 22a is fixed to the bracket 9 of the existing unit staircase 30a. (FIG. 1 (e), FIG. 2, FIG. 5).
[0033]
(6) Since the predetermined unit stairs 30, 30a are laminated as described above and the laminated unit stairs 30 are self-supporting, the steel stairs 22 surrounded by the inner formwork of the staircase wall prior to the construction of the frame. , 22 can be constructed, so that the steel steps 22 and 22 can be used as a passage for carrying equipment.
[0034]
(7) When constructing the staircase wall, a rebar for wall (not shown) is arranged outside the inner mold frame 20 as in the prior art, and the wing plate 44a of the separator 44 is inserted into the through hole of the lateral rib 5. 7 (or hole that was not used for bonding junction rib 4) fixed with bolts and nuts, the other end 44b of the separators 4 4, assembled outer frame 45 in such plywood, foam tie 46, round pipe Tighten with 47, 47 and rib washer 48. Concrete is placed in the molds 20 and 45, and after the concrete is solidified, the outer mold 45 and the like are removed to construct the staircase wall 49 (FIG. 12B).
[0035]
Here, the receiver 16 is embedded in the wall of the staircase wall, but can be removed if there is a problem.
[0036]
[Other embodiments]
In the above-described embodiment, if the steel staircase 22 and the wall panel 1 are further subjected to surface treatment such as hot dip galvanization on the other used members in advance, it is time and effort to apply finishing materials such as painting and cloth pasting after the construction of the staircase. As well as preventing rusting, maintenance can be eliminated.
[0037]
Moreover, in the said Example, although the projecting part is protected in the unit staircase 30 in which the lower end part 22a of the steel frame staircase 22 projects below the inner mold 20, and the temporary mount 28 is used from the viewpoint of work efficiency, If the unit staircase has no projecting portion and an assembly position that can maintain a predetermined level can be secured in the field, the temporary mount 28 is not necessary. Further, when there is no downward projecting portion, the temporary suspension member 32 and the temporary suspension receiving member 33 are also unnecessary.
[0038]
Further, in the above embodiment, when there is no crane with high capacity, the wall panels 1 and 1 are assembled at the stair construction position, the inner mold 20 is constructed, and the steel steps 22 and 22 are attached to construct the unit stair 30. To do. Therefore, in this case, the connection operation with the existing unit staircase 30a and the construction operation of the unit staircase 30 are performed simultaneously (not shown).
[0039]
【The invention's effect】
Since the unit staircase is configured by installing the staircase members inside the inner formwork, the inner formwork and the staircase of the staircase can be built at the same time by stacking unit staircases. The staircase with the staircase can be constructed regardless of the construction of the housing or prior to the construction of the housing, and the construction efficiency of the entire building can be improved. Unit staircases can be stacked in advance of the chassis, so that these staircases can be used for passages for equipment transport, etc., and the inner formwork can stand on its own, so there are obstacles such as temporary objects to support the unit staircase. Without being able to improve the safety of work.
[0040]
In addition, a wall panel of a predetermined height that constitutes the inner mold of the staircase wall is used to form a self-supporting inner mold of the staircase wall. Since the staircase member is fixed to the inner mold of the staircase wall, there is an effect that a multi-stage staircase and a staircase can be constructed in advance regardless of the construction of the frame. In addition, because the staircase member is fixed to the inner formwork of the staircase wall, the staircase can be advanced regardless of the height of the frame, and the fixing work between the frame and the staircase can be omitted, further improving the work efficiency, and the unit The staircase can also have a structure in which a staircase member protrudes up and down from the inner mold frame or is pulled in, and has an effect of allowing a free design of the structure by separating the staircase and the casing.
[0041]
Further, when the bracket is attached to the wall panel in advance, there is an effect that the positioning of the inner mold and the stair member and the connecting work can be simplified, and the construction work of the unit stair and the connecting work of the unit stair can be made efficient.
[0042]
In addition, when a wall panel with a scaffolding plate support is used, it is possible to build a scaffold on the support and work, reducing the construction and removal of temporary structures, and further improving work efficiency. There is an effect that can be achieved.
[Brief description of the drawings]
FIGS. 1A to 1E are schematic perspective views for explaining a construction method according to the present invention. However, the scaffolding brackets are omitted.
FIG. 2 is a plan view of a unit staircase according to an embodiment of the present invention.
FIG. 3 is a front view of the unit staircase.
4 is a cross-sectional view taken along line AA in FIG.
FIGS. 5A and 5B are views showing a bracket for fixing a stair member in the wall inner mold according to the present invention, wherein FIG. 5A is a partially enlarged plan view, and FIG. 5B is a cross-sectional view taken along line BB in FIG. (C) is sectional drawing in the CC line of (a).
6A and 6B are views showing a supporting member for a working scaffold plate in a unit staircase according to the present invention, in which FIG. 6A is a partially enlarged front view, and FIG. 6B is a partially enlarged plan view.
7 (a) and 7 (b) show different embodiments of the working scaffold board support member in the unit staircase of the present invention.
FIG. 8A is a schematic plan view of a staircase, and FIG. 8B is a schematic perspective view of an inner mold for a unit staircase wall.
9A is another schematic plan view of a staircase, and FIG. 9B is a schematic perspective view of an inner mold for a wall of another unit staircase.
10A is another schematic plan view of a staircase, and FIG. 10B is a schematic perspective view of an inner mold for a wall of another unit staircase.
FIG. 11 is a schematic perspective view showing the configuration of another step member.
FIGS. 12A and 12B are diagrams illustrating the construction of an outer mold, in which FIG. 12A is a partial cross-sectional view of a unit staircase, and FIG. 12B is a cross-sectional view taken along line DD in FIG.
[Explanation of symbols]
1 Wall panel 2 One side of wall panel (outside)
3 Other side of wall panel (inside)
4 Wall panel joint rib 9 Bracket 16 Receiving bracket (for scaffolding)
20, 20a Inner mold 22 Steel staircase (staircase member)
28 Temporary pedestals 30, 30a Unit staircase 38 Inner mold 41 Inner mold 43 Inner mold 45 Outer mold

Claims (4)

A steel plate for an internal formwork for building a concrete staircase wall on a temporary mount , forming a wall panel with a predetermined height to which a support is attached in advance, and building the wall panel so that it can stand independently Constructing the inner mold of the chamber wall, constructing a scaffolding plate on the receiver, and constructing a unit staircase with a predetermined unit of staircase members inside the inner mold,
Next, the scaffold plate is removed from the receiver, the unit staircase is lifted by a crane, transferred from the temporary mount to the planned stair construction position, the unit staircases are sequentially placed and stacked, and the upper and lower unit staircases are And
Subsequently, a predetermined structural reinforcing bar and an outer mold are constructed on the outer periphery of the inner mold, concrete is placed in both molds, and the receiver is embedded to construct a staircase wall. And how to build stairs. A steel plate of the inner mold for for building concrete stairway wall constitutes the inner mold stairway wall, and forms a wall panel of a predetermined height in advance receptacle is attached, the receiving again and again and erection scaffolding plate, assembling the wall panels on the stairs planned installation position, self-supporting can configure the inner mold stairway wall unit with interior stairs member of a predetermined unit in the inner formwork The staircase is constructed, and the inner formwork and the staircase member are sequentially placed and laminated, and then a predetermined structural reinforcing bar and outer formwork are constructed on the outer periphery of the staircase interior formwork, and the concrete is placed in both formwork. A method for constructing a staircase, wherein the staircase wall is constructed by placing and embedding the receptacle . A bracket for receiving a staircase member is attached to the inner surface of the wall panel in advance , and the bracket is fixed at a position other than the upper and lower connecting positions of the wall panel, and the step board and landing of the staircase member are at a predetermined height. The staircase construction method according to claim 1 or 2, which is set so as to be arranged . A planar inner shape of the wall that can be self-supported by a steel plate opened up and down is formed in a planar shape along the inner surface of the staircase to be constructed, and a connecting rib for connection is formed on the lower edge of the inner mold for the wall In addition, a predetermined unit of staircase member is fixed inside the wall inner mold ,
A bracket for receiving a staircase member is attached in advance to the inner surface of the wall panel, and the fixing position of the bracket is a position other than the upper and lower connection positions of the wall panel, and the step board and landing for the staircase member to be installed Set to be placed at a predetermined height,
Further, a unit staircase , wherein the wall panel is provided with a receiving member on the outer surface of which a scaffold can be constructed and which can be embedded in the staircase wall .

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