JP3902979B2 - Concrete placing form and method for constructing concrete structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a concrete placing form for constructing a concrete structure having a jaw part such as a parapet or equipment foundation constructed on the roof of the structure, and construction of a concrete structure using the concrete placing form Regarding the method.
[0002]
[Prior art]
  For example, as shown in FIG. 3, the parapet 3 arranged so as to surround the rooftop 2 of the building 1 is provided with a waterproof rising protection plate 25 for protecting the drainage, the waterproof layer 19 and the like on the inner surface thereof. thingTheFor this purpose, it is necessary to provide a so-called jaw portion 28 having a complicated shape.
[0003]
[Problems to be solved by the invention]
  However, the jaw part 28 is a parapet.3Since it has a shape that is arranged in the upper part of the roof and protrudes inward of the rooftop 2, the jaw part 28 is a parapet.3When it is constructed as a reinforced concrete structure that is integral with, it is necessary to provide a mold frame 29 for raising the upper part of the jaw part 28. In addition, it is difficult to dispose the reinforcing bars 30 and to place the concrete in the jaw portion 28, and the upper end surface 28a of the jaw portion 28 is an opening, so that the concrete is likely to blow out when the concrete is placed. Work such as lifting and leveling becomes necessary, which not only makes the work complicated, but also has a problem that it takes a construction cost and a construction period.
[0004]
In view of the above circumstances, the present invention provides a concrete placement formwork that has a simple configuration and good workability, can reduce the construction cost and work period, and a method for constructing a concrete structure using the concrete placement formwork. It is aimed.
[0005]
[Means for Solving the Problems]
  Claim 1The inventionOn the upper surface of the floor forming a horizontal planeA concrete placement mold for constructing a concrete structure which is erected and has an upper jaw portion, and is disposed on the same vertical axis on the lower placement mold and the upper end surface of the lower placement mold The lower driving mold and the upper driving mold each have a smooth surface on one side and a rough surface on the other surface, and the lower driving molds. The frame and the upper placement mold are connected so that the other surface having the rough surface forms a continuous plane, and the other surface is a concrete placement surface, and one of the upper placement molds At the lower end of the surface, a band-like convex member as the jaw part is provided integrally extending in the length direction of the upper placement mold,The lower surface of the convex member is provided with a notch extending in the length direction.
[0006]
  Claim 2The invention is integrally provided so as to protrude from one surface of the upper placement formwork.The convex member isTheMolded to have a lower surface perpendicular to one surfaceHas beenIt is characterized by that.
[0008]
  Claim 3In the concrete structure construction method described above, reinforcing bars constituting the concrete structure are arranged along the inner side surface of the outer mold frame on the upper surface of the floor portion fixed so that the outer mold frame is erected on the outer peripheral surface. The lower placement mold is placed so that the inner surface of the outer mold and the other surface formed on the rough surface of the lower placement mold face each other in parallel with a predetermined distance across the reinforcing bar. A first step of standing and fixing the lower end portion of the lower placement formwork to the floor surface through a fixing material;Upper placement mold with a convex member at the lower endIs disposed at the upper end of the lower driving mold so that the other surface formed on the rough surface faces the outer mold, and the upper driving mold and the lower driving mold are rough. The second step of constructing a concrete placement form by connecting through a connecting material so as to form the same plane, and placing concrete between the concrete placement form and the outer formwork And a third step to be provided.
[0009]
  Claim 4The method for constructing the concrete structure described is such that a cage rebar combined with a plurality of reinforcing bars is arranged in a predetermined area on the upper surface of the floor constructed so as to form a horizontal plane, and the cage reinforcing bar is surrounded. A lower placement mold formed so that the other surface formed on the rough surface becomes the inner surface is erected, and a lower end portion of the lower placement mold is fixed to the floor surface with an adhesive. The first step, the planar shape of the lower end surface is the same as the upper end surface of the lower placing mold, the other surface formed on the rough surface is the inner surface,A convex member is provided at the lower end of the outer surfaceA second step of placing the upper placement formwork on the upper end of the lower placement formwork and connecting it via a connecting material to construct a concrete placement formwork; and It is characterized by comprising a third step of placing concrete inward.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
  Of the present inventionConcrete placement formworkAnd construction method of concrete structureEmbodimentIs shown in FIGS.
[0011]
As shown in FIG. 1, a rising form 8, which is a concrete placing form, is used as an inner form for the parapet 3 provided on the outer periphery of the rooftop 2 of the building 1. The rising form 8 includes a lower placing form 9 and an upper placing form 10, and the lower placing form 9 is a lightweight steel material, a high-strength extruded cement board, or the like generally used as a placing form. These materials are used to form a plate having a smooth surface on one surface 9a and a rough surface on the other surface 9b by extrusion molding. Also, the upper placement mold 10 is made of a material such as a lightweight steel material or a high-strength extruded cement board, like the lower placement mold 9, and is smoothed on one surface 10a by extrusion and the other surface. 10b is formed into a plate shape having a rough surface.
[0012]
The lower driving mold 9 and the upper driving mold 10 have an upper end surface 9c of the lower driving mold 9 and a lower end surface 10c of the upper driving mold 10 having the same cross-sectional shape, By connecting these via a connecting member 12 formed in an H shape, the rising mold 8 is formed. At this time, the lower placing mold 9 and the upper placing mold 10 are arranged such that one surface 9a having a smooth surface and one surface 10a form one side surface 8a of the rising mold frame 8, The other surface 9 b having the rough surface and the other surface 10 b are arranged so as to form the other side surface 8 b of the rising mold 8. This is to improve the fixing strength between the concrete 16 and the rising mold 8 by forming the other surface 8b forming the rough surface on the rising mold 8 and using it as a concrete casting surface. is there.
[0013]
In addition, when the upper placement form 10 and the lower placement form 9 are combined to form the rising form 8, the other side surface 8 b smoothly connected to the concrete placement surface is formed. For example, the cross-sectional shape of the upper end surface 9c of the lower placement form 9 and the lower end surface 10c of the upper placement form 10 do not necessarily have to be the same, and the outer shape of the rising form 8 is a flat plate type or a curved type. Or any shape such as a cylindrical shape. However, when formed into a cylindrical shape, the rising mold 8 is formed so that the other surface 8b side on which the rough surface is formed is disposed on the inner surface.
[0014]
  By the way, one surface 10a of the upper placing mold 10 is described.The lower end of the is itself the jaw partThe convex member 11 is integrally formed. The convex member 11 is provided in a band shape in the length direction, and the lower surface of the convex member 11 forms an orthogonal surface with respect to the one surface 10 a of the upper placement mold 10.Pre-moldedHas been. A notch 11 a is provided in the length direction of the convex member 11 on the lower surface slightly inward from the tip of the convex member 11, and accordingly, the tip of the lower surface of the convex member 11 is drained. Part 11b is formed. Further, the other surface of the upper placing mold 1010bIn the upper end, for the purpose of preventing intrusion of rainwater or the like from the boundary surface between the upper placing form 10 and the concrete 16, unappliedSulfurA butyl rubber 10d is attached.
[0015]
  SaidThe convex member 11 isFor example, when a concrete structure using the rising form 8 is constructed on the rooftop 2, a waterproof rising protection plate 25 is attached to protect the joint portion with the waterproof processing disposed on the floor slab 17 or the like of the rooftop 2. It functions as a jaw part. Further, the draining portion 11b prevents rainwater from descending along the side surface from the top end of the concrete structure. For example, the rainwater traveling along the side surface from the top end of the concrete structure has a floor slab 17 on the rooftop 2. The phenomenon which flows into the fine clearance gap etc. which are easy to occur in the joint part of the waterproof process and concrete structure which are distribute | arranged etc. is prevented.
[0016]
In the following, a concrete structure using a rising formwork 8 which is a concrete placing formwork, taking as an example a parapet 3 provided on the rooftop 2 of the building 1 and an equipment mount 27 as a concrete structure having a jaw part. The construction method is shown.
[0017]
(First embodiment)
As shown in FIG. 1, a parapet 3 provided on the outer periphery of the rooftop 2 of the building 1 includes an outer mold 4, a rising mold 8 that is a concrete casting mold as an inner mold, It is comprised by the concrete 16 filled into the direction. A protective waterproof layer 22 generally known as waterproofing is provided on the upper surface of the roof slab 17 on the roof surrounded by the parapet 3, and the end of the protective waterproof layer 22 and the parapet 3 are connected to each other. The joint portion is protected by a waterproof rising protection wall 25 fitted to the jaw-shaped convex member 11 formed integrally with the parapet 3. The construction method of the parapet 3 which is such a concrete structure is shown below.
[0018]
In the first step, the outer mold frame 4 provided on the side end surface of the floor slab 17 so as to enclose the rooftop 2 of the building 1 in advance so as to be parallel with this at a predetermined interval, The reinforcing bars 3a constituting the parapet 3 are arranged on the upper surface of the floor slab 17. A lower placing mold 9 is erected so as to be parallel to the outer mold 4 with a predetermined distance across the reinforcing bar 3a, and the lower end portion of the floor slab is fixed via a fixing material 13 such as mortar. It adheres to the upper surface of 17. At this time, the lower placement mold 9 is arranged so that the other surface 9b formed on the rough surface of the lower placement mold 9 faces the outer mold 4 face to face.
[0019]
Here, the outer mold 4 is joined to the side end surface of the floor slab 17 of the rooftop 2 so as to stand in the vertical axis direction. The outer mold frame 4 uses a generally used outer wall driving mold frame material, and a connection auxiliary member 5 such as an inazuma plate is attached to the outer surface of the outer mold frame 4, and a fastening member 6 such as a bolt. The outer wall material 7 is fixed to the connection assisting member 5 via the. The floor slab 17 constituting the rooftop 2 surrounded by the outer mold 4 is formed by a deck plate 15 and concrete 16.
[0020]
Next, in the second step, the connecting member 12 is arranged on the upper end surface 9c of the lower placing mold 9 and the lower end surface 10c of the upper placing mold 10 is arranged on the upper part to connect them. A rising form 8 is formed. At this time, similarly to the lower placement mold 9, the upper placement mold 10 is also arranged such that the other surface 10 b formed on the rough surface faces the outer mold 4 face to face.
[0021]
Here, the connecting member 12 is made of a rod-shaped steel material having an H-shaped cross section that has been conventionally used for connecting the driving molds. The connecting member 12 is arranged so that the opening is positioned vertically, and the upper opening 9c of the lower placing mold 9 is fitted into the lower opening, and the upper placing mold 10 is placed in the upper opening. The end surface 10c is fitted and these are connected. Note that the connecting member 12 is not particularly limited, and any method can be used as long as the lower driving mold 9 and the upper driving mold 10 can form the same plane with their joints smoothly and continuously formed. May be.
[0022]
Thereafter, in the third step, concrete 16 is placed inside the outer mold 4 and the rising mold 8, and after this hardening, the head support 14 a is arranged on the top end of the concrete 16. The caps 14 are placed on the upper surface so as to cover the upper end portions of the exterior material 7, the outer mold frame 4, and the rising mold frame 8, and after positioning, the parapet 3 is clamped via the fastening means 6 such as bolts. Fasten to the top edge. Through these steps, the parapet 3 is constructed on the rooftop 2 of the building 1.
[0023]
Here, although the commonly used aluminum headboard is used for the headboard 14, it is not limited to this but is a lightweight and economical steel material that functions as a headboard for protecting the top end of the parapet 3. Any of these may be used.
[0024]
  At the same time as the third step, the waterproof layer 19, the heat insulating material 20, and the upper surface of the floor slab 17 are provided.HoldingA so-called protective waterproof layer 22 is laid in the order of the concrete 21. As the waterproof layer 19 disposed in the lowermost layer, a generally known asphalt waterproof layer using asphalt is used. The waterproof layer 19 covers one surface 9a of the lower placing mold 9 continuously from the upper surface of the floor slab 17, and its end reaches the vicinity of the upper end surface 9c, and the cross section is L-shaped. It is pressed and fixed to the one surface 9a side of the lower placing mold 9 by a presser bar 23 which is a steel bar. In addition, when the clearance gap has arisen between the presser foot 23 and the lower surface of the convex-shaped member 11 provided in the upper placement formwork 10, the sealing member 26 is distribute | arranged and the edge part of the waterproof layer 19 is attached. Seal completely.
[0025]
  Further, a heat insulating material 20 made of a material such as polystyrene is provided above the waterproof layer 19 only above the floor slab 17.TheOn top of itHoldingConcrete 21 is arranged.Between the upper surface of the heat insulating material 20 and the waterproof layer 19 covering the one surface 9a of the lower placement mold 9, it is made of foamed polyethylene.The corner cushion material 18 is attached, and the waterproof layer 19 is not in conflict. The protective waterproof layer 22 is not particularly limited to this, and any waterproof processing such as exposure waterproofing may be used as long as it is a method having waterproof performance.
[0026]
In order to protect such a joint between the protective waterproof layer 22 on the floor slab 17 and the parapet 3, the notch 11b of the jaw-shaped convex member 11 formed integrally with the parapet 3 and the vertical A fixed metal plate 24 made of steel bar having a U-shaped cross section is disposed on the upper surface of the protective waterproof layer 22 in the same direction, and the waterproof rising protection plate is fitted to both the fixed metal plate 24 and the notch 11b. 25 is attached to protect the end of the protective waterproof layer 22.
[0027]
Here, the waterproof rising protection plate 25 and the rising mold 8 are made of a high-strength extruded cement board that is generally used as a wall material. If it is the wall material which has, it will not stick to this.
[0028]
(Second Embodiment)
As shown in FIG. 2, the equipment stand 27 provided on the rooftop 2 of the building 1 is constructed of a rising form 8 and a concrete 16 that make a pair. The device base 27 has an area in consideration of not only the planar shape of the device to be placed but also the maintenance space of the device. In addition, the roof 2 on which the equipment base 27 is provided is provided with a protective waterproof layer 22 that is generally known as waterproof processing on the upper surface of the floor slab 17, as in the first embodiment. The connecting portion between the end portion of the protective waterproof layer 22 and the device mount 27 is protected by a waterproof rising protection wall 25 fitted to the jaw-shaped convex member 11 formed integrally with the device mount 27. . A method for constructing the equipment stand 27 which is such a concrete structure will be described below.
In the second embodiment, the same members as those used in the first embodiment are used.
[0029]
In the first step, a car rebar 27a that is a combination of a plurality of rebars is arranged at a predetermined position on the floor slab 17 of the rooftop 2 of the building 1 in consideration of the load of equipment to be placed later. The lower placement mold 9 is erected so that the other surface 9b formed on the rough surface becomes the inner surface so as to surround the reinforcing bar 27a, and the lower end portion of the lower placement mold 9 is It is fixed to the upper surface of the floor slab 17 via the fixing material 13.
[0030]
Here, the lower placing mold 9 can surround a predetermined region, and the other surface 9b formed in a rough surface on the inner surface may be disposed, and is formed into a cylindrical shape, Alternatively, the side surfaces of the plurality of lower placement molds 9 are connected to each other via a connecting means, and a lower body placement form 9 connection body in which the other surface 9b formed on the inner surface is provided with a rough surface is configured. Any configuration may be used.
[0031]
Next, in the second step, the connecting member 12 is arranged on the upper end surface 9c of the lower placing mold 9 and the lower end surface 10c of the upper placing mold 10 is arranged on the upper part to connect them. A rising form 8 is formed. At this time, similarly to the lower placing mold 9, the other surface 10b formed on the rough surface is also arranged on the inner surface side in the upper placing mold 10.
[0032]
  In addition, the upper placement mold 10 has the above-mentioned unapplied portion at the upper end portion of the other surface 10b.SulfurIf the butyl rubber 10d is disposed and the other surface 10b forms a plane continuous with the other surface 9b of the lower placement mold 9, and can surround a predetermined region, the lower placement mold As in 9, a plurality of external shapes may be used, or a plurality of external shapes may be used.
[0033]
Thereafter, in the third step, concrete 16 is placed inward of a predetermined region surrounded by the rising form 8, and the equipment frame 27 on the rooftop 2 of the building 1 is constructed by these steps. . The top end of the equipment base 27 is subjected to waterproofing such as a waterproof coating 31.
[0034]
  Simultaneously with the third step, as in the first embodiment, the waterproof layer 19, the heat insulating material 20, and the top surface of the floor slab 17 are provided.HoldingA so-called protective waterproof layer 22 is laid in the order of the concrete 21. In order to protect such a joint between the protective waterproof layer 22 on the floor slab 17 and the device mount 27, a notch portion 11b of the jaw-shaped convex member 11 formed integrally with the device mount 27; A fixed metal 24 made of steel bar having a U-shaped cross section is coaxially arranged in the vertical direction and is provided on the upper surface of the protective waterproof layer 22, and is protected from rising so as to be fitted to both the fixed metal 24 and the notch 11b. A plate 25 is attached to protect the end of the protective waterproof layer 22.
[0035]
  In the first and second embodiments, the upper placing mold 10 is connected to the lower placing mold 9 to form the rising mold 8 that covers the entire rising surface of the concrete structure. Although the construction method of the concrete structure using the frame 8 was shown, the upper placement mold 10 is not limited to this, and the position where the convex member 11 can function as an jaw.In advance at its lower endIntegrated with concrete structuresProvideIf it is a structure, the structure which uses the upper placement formwork 10 for a concrete structure is good also as any structure.
[0036]
According to the above-described configuration, the upper placing mold 10 is provided with the convex member 11 functioning as the jaw part integrally with the concrete structure, so that the concrete structure requires attachment of the jaw part. The construction for constructing the object is simple, and it is possible to simplify construction work such as bar arrangement, formwork assembly, and concrete placement.
[0037]
Since the convex member 11 is molded so as to have a lower surface orthogonal to one surface 10a of the upper placing mold 10, even if the jaw portion is formed to a minimum size, functionality is improved. It becomes possible to make the structure which has enough.
[0038]
Since the concrete casting mold used when constructing the concrete structure having the jaw part, the rising mold 8 formed by connecting the upper casting mold 10 and the lower casting mold 9 is used. The jaw part is formed by the convex member 11 of the upper placing mold 10 and does not need to be reinforced concrete, and the concrete placement surface is formed on a flat surface, so that the concrete structure can be slimmed. This makes it possible to significantly reduce material costs for reinforcing bars, concrete, etc., and can greatly contribute to the reduction of construction costs.
[0039]
In addition, since it is not necessary to construct the jaw part in the concrete structure, the construction of the concrete structure is simple, and the construction work such as reinforcement and formwork assembly and concrete placement is simplified, and the formwork disassembly work In addition, plastering processes such as smoothing and smoothing, which are necessary for conventional concrete jaws, are unnecessary, and the workability is good, and it is possible to greatly contribute to the reduction of construction cost and construction period.
[0040]
  Furthermore, since the upper placement form 10 and the rising form form 8 using the upper placement form 10 are concrete placement forms embedded in concrete structures, the amount of use of the plywood for formwork is greatly increased. It can be reduced and waste material is generatedthingTherefore, it is possible to greatly reduce construction waste emissions and contribute to environmental protection.
[0041]
【The invention's effect】
  Claim 1The concrete placement form is a concrete placement form for constituting a concrete structure having an upper part standing on the upper surface of a floor part forming a horizontal plane, and a lower placement form, It is composed of an upper placement mold placed on the same vertical axis at the upper end surface of the lower placement mold, and each of the lower placement mold and the upper placement mold is a smooth surface, The other surface has a rough surface, and the lower placement mold and the upper placement mold are connected so that the other surfaces having the rough surface form a continuous plane. Is a concrete placement surface, and a belt-like convex member as the jaw portion extends in the length direction of the upper placement mold at the lower end of one surface of the upper placement mold. Since a notch extending in the length direction is provided on the lower surface of the convex member,Since the convex member of the upper placement mold that functions as the jaw part is configured to be provided integrally with the concrete structure, the structure when constructing the concrete structure that requires attachment of the jaw part is simple, It is possible to simplify construction work such as bar arrangement, formwork assembly, and concrete placement.
In particular, since the convex member provided in the upper placement mold itself functions as the jaw part, it is possible not only to eliminate the troublesome troublesomeness when constructing the jaw part as a reinforced concrete structure as in the past. Since the concrete placement surface can be formed in a simple flat shape, it is possible to reduce the size of the concrete structure, greatly reduce the cost of materials such as reinforcing bars and concrete, and contribute greatly to the reduction of construction costs. It becomes possible.
[0042]
According to the upper placement mold according to claim 2, since the convex member is formed to have a lower surface orthogonal to the one surface, the jaw portion is formed to a minimum size. However, it is possible to obtain a configuration having sufficient functionality.
[0044]
  The method for constructing a concrete structure according to claim 3 is:On the upper surface of the floor portion fixed so that the outer mold frame is erected on the outer peripheral surface, a reinforcing bar constituting a concrete structure is disposed along the inner side surface of the outer mold frame, The lower placement mold is erected so that the inner surface of the mold and the other surface formed on the rough surface of the lower placement mold face each other at a predetermined interval in parallel. A first step of fixing the lower end of the first floor to the floor surface through a fixing material;Convex member was provided at the lower endThe upper placement mold and the lower placement mold are arranged at the upper end of the lower placement mold so that the other surface formed on the rough surface faces the outer mold. A second step of constructing a concrete placement mold, which is connected to each other so as to form the same plane with the rough surfaces, and the concrete placement mold; and the outer mold And a third step of placing concrete in between.
According to a fourth aspect of the present invention, there is provided a method for constructing a concrete structure, in which a cage rebar combined with a plurality of reinforcing bars is arranged in a predetermined region on the upper surface of a floor constructed so as to form a horizontal plane, A lower placement mold formed so that the other surface formed on the rough surface becomes an inner surface so as to surround, and the lower end portion of the lower placement mold is disposed on the lower side through the fixing material. The first step of fixing to the floor surface, and the planar shape of the lower end surface are the same as the upper end surface of the lower placing mold, the other surface formed on the rough surface is the inner side surface, and the lower end portion of the outer side surface A second step of constructing a concrete placement mold by placing an upper placement mold provided with a convex member on the upper end of the lower placement mold and connecting them via a connecting material; And a third step of placing concrete inside the concrete placing form.
[0045]
  Therefore, according to the method for constructing a concrete structure according to claims 3 and 4, the entire concrete placement form made up of the upper placement formwork and the lower placement formwork is integrated into the concrete structure as it is. ,The amount of plywood used for formwork can be greatly reduced, and no waste material is generated, so that construction waste can be greatly reduced, contributing to environmental protection.
[0046]
  In particular, since the convex member provided in advance in the upper placement formwork becomes the jaw part as it is, not only can the special and troublesome labor for the construction of the jaw part be omitted,Since it is not necessary to construct the jaw part in concrete, the construction of the concrete structure is simple, and the construction work such as reinforcement and formwork assembly and concrete placement is simplified, and the formwork disassembly work and conventional This eliminates the need for plastering processes such as smoothing and smoothing, which are necessary for the concrete jaws, and improves the workability and can greatly contribute to the reduction of construction costs and the construction period.
  Also,Since the convex member which becomes the jaw part is provided at the lower end part of the upper placement mold, the other part to the jaw part and the upper part only by using this upper placement moldPossible to omit the formworkTherefore, the entire concrete structure having the jaw portion can be efficiently constructed.
[Brief description of the drawings]
FIG. 1 is a view showing a concrete structure by a concrete placing form according to the present invention.
FIG. 2 is a diagram showing another example of a concrete structure using a concrete placing form according to the present invention.
FIG. 3 is a diagram showing an outline of a conventional concrete structure.
[Explanation of symbols]
  1 building
  2 rooftop
  3 Parapet
  3a rebar
  4 Outer formwork
  5 Auxiliary connection member
  6 Fastening member
  7 Exterior wall materials
  8 Rising formwork(Concrete placement formwork)
  8a One side
  8b The other side
  9 Lower placement formwork
  9a One side
  9b The other side
  9c Upper end surface
  10 Upper placement formwork
  10a One side
  10b The other side
  10c Lower end surface
  10d not yetVulcanizationButyl rubber
  11 Convex member(Chin part)
  11a Notch
  11b Drainer
  12 Connecting members
  13 Adhesive material
  14 Kasagi
  15 Deck plate
  16 concrete
  17 Floor slab
  18 Corner cushion material
  19 Waterproof layer
  20 Insulation
  21Holdingconcrete
  22 Protective waterproof layer
  23 Presser hardware
  24 Fixed hardware
  25 Waterproof rising protection plate
  26 Seal member
  27 Equipment stand
  27a Reinforcing Bar
  28 jaws
  28a Upper end surface
  29 formwork
  30 Rebar
  31 waterproof coating

Claims (4)

Is erected on the upper surface of the floor portion to form a horizontal surface, a concrete driving tool mold for forming the concrete structure having a jaw portion at the top,
Is configured with a lower hammering formwork, the upper hammering formwork are arranged on the same vertical axis to the upper end face of the lower implantation formwork,
Each of the lower placement mold and the upper placement mold has a smooth surface on one side and a rough surface on the other side, and the lower placement mold and the upper placement mold have a rough surface. The other surfaces of the other surfaces are connected so as to form a continuous plane, and the other surface is a concrete placement surface,
At the lower end of one surface of the upper placement mold, a belt-like convex member as the jaw portion is integrally provided extending in the length direction of the upper placement mold, and the convex shape. A concrete placement form, wherein a notch portion extending in a length direction is provided on a lower surface of the member. A concrete placement form according to claim 1 ,
A concrete placing characterized in that the convex member integrally provided so as to protrude from one surface of the upper placement form is formed to have a lower surface orthogonal to the one surface. Formwork. A method for constructing a concrete structure using the concrete placing form according to claim 1 or 2 ,
On the upper surface of the floor portion fixed so that the outer mold is erected on the outer peripheral surface, reinforcing bars constituting the concrete structure are arranged along the inner surface of the outer mold, and the outer bars are sandwiched between the outer bars. The lower placement mold is erected so that the inner surface of the mold and the other surface formed on the rough surface of the lower placement mold face each other in parallel with a predetermined interval. A first step of fixing the lower end of the first floor to the floor surface through a fixing material;
An upper placement mold having a convex member at the lower end is disposed at the upper end of the lower placement mold so that the other surface formed on the rough surface faces the outer mold, A second step of constructing a concrete placement form by connecting the upper placement form and the bottom placement form via a connecting material so that the same surface is formed between rough surfaces;
A method for constructing a concrete structure, comprising: a concrete placing form and a third step of placing concrete between the outer formwork. A method for constructing a concrete structure using the concrete placing form according to claim 1 or 2 ,
A car rebar combined with a plurality of reinforcing bars is arranged in a predetermined region on the upper surface of the floor portion constructed to form a horizontal plane, and the other surface formed on the rough surface is surrounded by the car reinforcing bar. A first step of standing a lower placement mold formed so as to be an inner surface, and fixing a lower end portion of the lower placement mold to the floor surface through a fixing material;
The upper placement where the planar shape of the lower end surface is the same as the upper end surface of the lower placing mold, the other surface formed on the rough surface is the inner side surface, and the convex member is provided at the lower end portion of the outer side surface A second step of placing a formwork on the upper end of the lower placement formwork and connecting via a connecting material to construct a concrete placement formwork;
A method for constructing a concrete structure, comprising: a third step of placing concrete inside the concrete placing form.

Images