JPH09221856A - Structural building frame using precast concrete plate and construction method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the degree of freedom of design of structural building frame, and to lower the cost. SOLUTION: Wall plates 21A-21C and floor plates 22A-22C, which are previously molded at the predetermined dimension Sn , are arranged at the predetermined position so as to be housed in the design dimension A'×B', A'×C of a structural building frame 10. A frame work is arranged in each clearance M1 -Mn generated by the arrangement of these wall plates 21A-21C and the floor plates 22A-22C so as to connect these wall plates 21A-21C and the floor plates 22A-22C. A reinforcement is arranged inside of the framework so as to connect these precast concrete plates 21, 22, and concrete is placed into the framework so as to form a structural building frame 10. Even in the case where arrangement of the wall plates 21A-21C and the floor plates 22A-22C is changed and the clearance parts M1 -Mn is changed, since the clearance parts M1 -Mn can be provided with a framework in the construction field, design dimension can be changed after molding a standard precast concrete plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structural skeleton using a precast concrete board and a construction method thereof.

[0002]

2. Description of the Related Art Conventionally, it is known that a structural body (building) such as a multi-story housing is made by casting concrete in-situ or assembled by joining a large number of precast precast reinforced concrete plates. In the construction of a building by cast-in-place, since the formwork is assembled on-site according to the design dimensions and concrete is placed, the degree of freedom in design can be obtained, but the construction days are required. On the other hand, in building a building using precast reinforced concrete boards, precast concrete boards that have been preformed are joined on site and assembled in sequence to build the building, which has the advantage that the number of construction days can be shortened and workability is good. Therefore, in recent years,
Construction methods using precast concrete boards tend to increase. When the structural skeleton is constructed only by the precast concrete board, the structural skeletons 2 and 3 are based on the predetermined design dimensions of the structural skeleton (dimensions A × B, A × C) as shown in FIGS. 11 and 12. The dimensions of the precast concrete boards are calculated, and the precast concrete boards 11A to 11C and 12A to 12C are preformed. The molded precast concrete plates 11A to 11C and 12A to 12C are joined and assembled at the site to construct a building.

[0003]

SUMMARY OF THE INVENTION In the above-mentioned conventional structural frame using the precast concrete plate and its construction method, various types of precast concrete plates must be preformed in accordance with the design dimensions of the structural frame. For this reason, it is necessary to remake a mold for precast concrete board molding for each structural skeleton, which causes a problem of cost increase. Also, once a precast concrete board corresponding to a certain structural body is molded,
There is a problem that the design change becomes difficult, and when the design change occurs, there is a problem that a precast concrete plate must be newly formed, and the already cast precast concrete plate is wasted.

The present invention has been made to eliminate the above-mentioned drawbacks, and increases the degree of freedom in designing a structural body, and
Provided are a structural body using a precast concrete plate and a construction method thereof, which enables a design change even after the precast concrete plate is molded, and can reduce the cost without impairing the workability of the construction.

[0005]

A structure body using a precast concrete board according to the present invention is a structure body using a precast concrete board constructed by assembling a number of preformed concrete boards. The standard precast concrete boards that are molded in the dimensions of, and are placed in predetermined positions in the number that fits within the desired design dimensions, and are placed in the formwork that is placed in the voids that occur between these standard precast concrete boards. It is constructed by using standard precast concrete boards and cast-in-place concrete that is connected.

Further, the method for constructing a structural frame using the precast concrete plate according to the present invention is as follows: Standard precast concrete plates that have been molded in a predetermined size are placed in predetermined positions in a number that fits within the desired design dimensions, and a formwork is placed in the voids that occur between these standard precast concrete plates. After connecting the spaces, concrete is placed in the formwork to construct the structural frame.

In the structural frame using the precast concrete plate according to the present invention, a standard precast concrete plate molded in a predetermined size in advance is arranged in a predetermined number according to the design size of the structural frame, and the standard precast A formwork is placed in the voids that occur between the concrete plates. Then place concrete in the formwork,
Since the structural skeleton is constructed, it is possible to standardize the precast concrete plate by narrowing the type of the precast concrete plate to a specific size. Therefore, it is not necessary to mold various precast concrete boards with different dimensions in conformity with the design dimensions of the structural body,
Construction costs are reduced. Moreover, the mold can be freely adjusted and installed on site even if the void is changed according to the position where the standard precast concrete plate is installed. Can be used to construct the structural body of. Therefore, the degree of freedom in design is increased, and even if a design change occurs, it can be easily dealt with.

The construction method of the structural skeleton using the precast concrete board according to the present invention is carried out in such a manner that the standard precast concrete board molded in a predetermined size in advance can be accommodated within the designed size of the structural skeleton in accordance with the desired designed size. After arranging at a predetermined position, arranging the formwork in the gap created between the arranged standard precast concrete plates and connecting the standard precast concrete plates, concrete is placed in the formwork to construct the structural frame. Therefore, even if there is a change in the design dimensions of the structural body, it is possible to respond to the design change by using the preformed standard precast concrete plate, and use the molded standard precast concrete plate without waste. You can Also, since it becomes possible to standardize and mold a large number of precast concrete boards with a mold of the same size, not only the manufacturing cost of the precast concrete boards can be reduced, but also maintenance management becomes easier and The storage space can be effectively used. Furthermore, in the voids created by the placement of standard precast concrete boards,
Since the formwork can be freely installed on site, the degree of freedom in designing the structural frame is increased.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings. 1 and 2 are respectively a cross-sectional view showing a wall portion of a structural body and a plan view showing a floor portion of the structural body according to one embodiment of the present invention, and FIG. 3 is a perspective view of the structural body shown in FIG. 4 and 5 are explanatory views showing a state in which cast-in-place concrete is placed in the voids, and FIG. 6 is an explanatory view showing a molding form of a standard precast concrete plate constituting a part of the structural skeleton. The same or corresponding parts as those of the above-mentioned conventional example are designated by the same reference numerals, and the description thereof will be omitted.
A structural body such as a multi-story housing is composed of a main structure that bears the structural strength of the building and a sub-structure that does not bear the structural strength. The main structure is composed of walls, floors, etc., and the sub-structure is composed of indoor partition walls, intermediate floors, stairs, etc.
In the present embodiment, the structural skeleton, for example, the walls and floors that form the main structure will be described.

The structural skeleton 10 according to the present embodiment is constructed by using standard precast concrete plates 21 and 22 which are molded and standardized in advance in a specific type of dimension. As shown in FIGS. 1 and 2, the standard precast concrete plates 21 and 22 are wall plates 21 or floor plates 22 depending on the application.
Molded as. Standard precast concrete board 2
For example, as shown in FIG. 6, 1 and 22 are molded by a pre-assembled molding frame 13. Forming mold 1
3 comprises a fixed frame 14 and a variable frame 15. As shown in FIG. 6, the inner dimension (longitudinal dimension) S _{1 in the} longitudinal direction is constant and the other inner dimension (lateral dimension) S _n is changed. You can do it. The variable frame 15 is variably provided for each pitch with respect to the fixed frame 14 with a predetermined constant dimension S ₃ (see FIGS. 1 and 4) of the standard precast concrete plates 21 and 22 to be molded as one pitch.
That is, standard precast concrete boards 21, 22
The variable frame 15 for determining the lateral dimension S _n of the standard precast concrete plates 21 and 22 is, for example, 15 mm.
Assuming 0 mm, the lateral dimension S _n is 5400 mm, 5550
mm, 5700 mm, ... 8100 mm, 150
It is variably provided for each mm. In addition, the molding frame 13 can also be provided with an opening frame (not shown) for molding the entrance and exit or the window at a predetermined position according to the design plan.

Standard precast concrete boards 21, 2
As shown in FIG. 6, when the variable frame 15 is attached to the fixed frame 14 while ensuring a desired inner dimension S _n ,
After arranging the reinforcing bars 17 (see FIG. 4) in the molding form 13,
It is cast by adding concrete. As described above, the standard precast concrete plates 21 and 22 have the lateral dimension S.
_n is a constant (S ₃₎ multiplied by an arbitrary integer (S
_n = S ₃ × N (N is an arbitrary integer). Also, molded standard precast concrete boards 21 (21A, ... 21C), 22 (22A, ...
.. 22C) has internal rebars 17 exposed to the outside and joined by welding or the like.

By the way, the structural body 10 according to the present embodiment.
1 to 4, a standard precast concrete plate 21 (wall plate 2
1A, ... 21C), 22 (floor boards 22A, ... 22
C) is the design dimension of the structural body 10 (design dimension A ′ in FIG. 1).
XB ', refer to the design dimension A'xC in FIG. 2), and the number of voids M ₁ and M generated between the standard precast concrete plates 21 and 22 are arranged at predetermined positions in a number that fits within the design dimension. _2, ··· M _n -type frame 23 connecting the standard precast concrete plates 21 and 22 (see FIG. 3)
(Refer to FIG. 4), reinforcing reinforcing bars 24 are arranged on the form 23, and the reinforcing bars 17 protruding from the ends of the standard precast concrete plates 21 and 22 are joined to the concrete 23. Then built.

In the design dimension A '× B' of FIG. 1, the dimension A '
One wall plate 21A, 21C is arranged on each side, and one wall plate 21B, 21B is arranged on the dimension B '. FIG.
In the design dimension A ′ × C of the floor board 22A, 22
Three B and 22C are arranged. And the arranged wall boards 21A to 21C and floor boards 22A to 22
Voids M _{1 to} M _n are formed between C, and these voids M _{1 to} M _n are formed.
_The formwork 23 is assembled on site according to _{1 to Mn} . Therefore, for example, the design dimensions are changed and the wall plates 21A to 21A are changed.
C, changes the arrangement of the floor plate 22A to 22C, the gap portion M ₁ ~
Even if M _n is changed, the mold 23 is vacant in the spots M _{1 to} M _{n on} site.
Since it can be assembled according to, the degree of freedom of design change increases. In addition, the inner surface of the mold 23 is engraved with relief, and when the mold 23 is removed, the relief appears on the surface of the cast and cast concrete that has been molded and hardened.

As described above, the structural body 10 according to the present embodiment.
Because so that in the field in the gap portion M ₁ ~M _n generated according to the arrangement of the standard precast concrete plates 21 and 22 provided mold 23, the dimension S ₁ type specific pre-cast concrete slab, S _n Can be standardized precast concrete plate. Therefore, it is not necessary to mold the precast concrete board in conformity with the design dimensions for each of various types of structural skeletons, and the construction cost can be reduced. In addition, even if the number and positions of the standard precast concrete plates 21 and 22 to be installed are changed due to the design change and the voids M _{1 to} M _n are changed, the standard precast concrete plates 21 and 2 are changed by the formwork 23.
Since the two can be connected to each other, it can be used for constructing another structural frame having different design dimensions by using the preformed standard precast concrete plates 21 and 22. Therefore, the degree of freedom in design is increased, and even if a design change occurs, it can be easily dealt with.

Next, a method for constructing a structural body using the precast concrete plate of the present invention will be described based on the structural body 10 according to the above-mentioned embodiment. The standard precast concrete boards 21 and 22 are wall boards 2 formed by the molding formwork 13.
1A to 21C and floor plates 22A to 22C are preformed. In the molding frame 13, the variable frame 15 has a predetermined pitch S.
It is variable at ₃ , so that the lateral dimension S _n of the standard precast concrete board can be changed. Next, the molded wall boards 21A to 21C and the floor boards 22A to 22C are set to the design dimension A ′ × of the structural body 10.
Design dimensions A'xB ', A'based on B', A'xC
The number is set in a predetermined position so that the number can fit within × C. then,
The void portion M ₁ ~M _n occurring between wallboard 21A~21C and floorboards 22A to 22C, as shown in FIG. 4, the wall plate 21A~21C adjacent to each of the gap portions M ₁ ~M _n, floorboards 22A~ A form 23 for connecting 22C is provided. Next, the reinforcing bars 24 are arranged on the formwork 23 and the reinforcing bars 17 protruding from the ends of the standard precast concrete plates 21 and 22.
And then the concrete T
And the structural body 10 is constructed. Relief engraving is applied to the inner surface of the mold 23, so that when the mold 23 is removed after the molding and hardening of the cast-in-place concrete, the relief appears on the surface of the cast-in-place concrete.

As described above, in the construction method of the structural skeleton using the precast concrete plate according to the present invention, for example,
Even if there is a design change in the structural frame 10, the precast standard precast concrete plates 21 and 22 can be used to cope with the design change, and the standard precast concrete plates 21 and 22 can be used without waste. . Further, since it is possible to mold a large number of standard precast concrete plates 21A to 21C and 22A to 22C with the standard precast concrete plate molding frame 13 having the same molding size, the manufacturing cost of the standard precast concrete plate is reduced. Not only is it easy to maintain, but the storage space for standard precast concrete boards can be used effectively. Furthermore, the wall plate 21A
~ 21C, the number and arrangement of floorboards 22A to 22C have changed,
Be void portion M ₁ ~M _n is changed, the mold 23 so can be assembled according to the gap portion M ₁ ~M _n in the field, the degree of freedom in designing the structural framework is increased.

FIG. 5 shows a modification of the void portion. The void portion M ₆ is formed between the wall plates 21B and 21B joined to each other and the other wall plate 21C, and the void portion M ₆ is formed. Concrete T is poured into the mold by a form (not shown). In addition, FIG. 7 shows a structural body 30 according to another embodiment, in which one wall plate 31B, 31B is two on one side and the other wall plate 31A, 31C is one each according to design dimensions. It is supposed to be done. Figure 8 shows a reinforcement 24 disposed in the gap portion M ₇ and its gap portion M ₇ structure skeleton 30 of FIG. Further, (A) and (B) of FIG. 9 are respectively constructed by assembling only the standard precast concrete plate based on the design dimension E × F when constructing the structural body using the standard precast concrete plate described above. The cross section of the structural skeleton and the cross section of the structural skeleton constructed by the standard precast concrete board and the cast-in-place concrete based on another structural skeleton having different design dimensions E × F ′ are shown for comparison. In addition, (A) of FIG.
Similarly, (B) shows a comparison of the cross-sections of the structural skeletons having different design dimensions G × H and G ′ × H.

In the above-mentioned embodiment, the main structural body which bears the structural strength of the building such as the wall and the floor as the structural frame is described, but the sub-structure body which does not bear the structural strength of the indoor partition wall, the intermediate floor and the like. Needless to say, is also applicable to. Further, in the above-mentioned embodiment, the standard precast concrete plate is arranged and the reinforcing bars are arranged in the voids, and then the concrete is placed, but the voids are provided in the corners of the dwelling unit, and the steel frames are provided in the voids. A beam may be formed by placing a support material such as the above and a reinforcing bar and pouring concrete.

[0019]

As described above, in the structural skeleton using the precast concrete board according to the present invention, the standard skeletons are molded in a predetermined size in advance and are arranged at predetermined positions in the respective numbers within the desired design size. The type of precast concrete board, which was constructed by precast concrete boards and cast-in-place concrete that is placed in the formwork placed in the voids that occur between these standard precast concrete boards and is connected to the standard precast concrete boards Since the number of standard precast concrete boards can be molded with the same form, the cost can be reduced. Moreover, since the formwork can be installed on site corresponding to the voids generated by the placement of the standard precast concrete plate, it is possible to use the preformed standard precast concrete plate for the construction of another structural skeleton with different design dimensions. it can. Therefore, the degree of freedom in design is increased, and even if a design change occurs, it can be easily dealt with.

Further, in the method for constructing a structural frame using the precast concrete plate according to the present invention, standard precast concrete plates molded in a predetermined size in advance are arranged at predetermined positions in a number that fits within a desired design size, After connecting the standard precast concrete plates by arranging the formwork in the voids generated between these standard precast concrete plates, by constructing the structural body by placing concrete in the formwork, Even if the design size changes, since the precast standard precast concrete board is used for construction, it is possible to easily deal with design changes and increase the degree of freedom in designing the structural body. In addition, since it is possible to mold a large number of standard precast concrete plates with a mold of the same size, not only the manufacturing cost of standard precast concrete plates can be reduced, but also maintenance management is facilitated and standard precast concrete plates can be stored. Space can be used effectively.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a wall portion of a structural body according to an embodiment of the present invention.

FIG. 2 is a plan view showing a floor portion of a structural body according to an embodiment of the present invention.

FIG. 3 is a perspective view of the structural body of FIG. 1.

FIG. 4 is an explanatory view showing a state in which concrete is placed in a void portion.

FIG. 5 is an explanatory diagram showing a state in which concrete is placed in a void portion.

FIG. 6 is an explanatory view showing a molding frame of a standard precast concrete plate which constitutes a part of the structural body.

FIG. 7 is a perspective view of a structural body according to a modification.

8 is an explanatory view showing a main part of the structural body of FIG. 8. FIG.

9 (A) and 9 (B) are cross-sectional views showing structural skeletons having different design dimensions in comparison with each other.

10 (A) and 10 (B) are cross-sectional views showing structural bodies having different design dimensions in comparison with each other.

FIG. 11 is a cross-sectional view showing a wall portion of a conventional structural body.

FIG. 12 is a plan view showing a floor portion of a conventional structural body.

[Explanation of symbols]

10 structure skeleton 21, 22-inch standard precast concrete plate 23 frame A '× B', A ' × design size S ₁ of the C structural framework, S _n dimensions S ₃ constant dimension M ₁ ~M _n gap portion of the standard precast concrete plate T cast-in-place concrete

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location E04B 2/56 603 E04B 2/56 603A 604 604C // E04B 5/17 5/17

Claims (5)

[Claims] 1. A structural body using precast concrete boards constructed by assembling a large number of precast concrete boards, which are preformed in a predetermined size and each of which has a predetermined position within a desired design size. Characterized in that it is constructed by standard precast concrete boards placed in the above and cast-in-place concrete that is placed in the formwork placed in the voids generated between these standard precast concrete boards and is connected to the standard precast concrete boards. Structural frame using precast concrete board. 2. A standard precast concrete plate has a predetermined dimension in one of the vertical and horizontal directions, and the other has a dimension in which a constant pitch is multiplied by an arbitrary integer with respect to a constant reference dimension. A structure body using the precast concrete plate according to claim 1. 3. The structural frame using a precast concrete plate according to claim 1, wherein a relief is formed on a concrete placing surface of the formwork. 4. A method for constructing a structural skeleton using a precast concrete plate for assembling a precast concrete slab that has been molded in advance to construct a structural skeleton. Placed in a predetermined number of places that fit inside, form the formwork in the void created between these standard precast concrete plates and connect the standard precast concrete plates, then place concrete in the formwork A method for constructing a structural skeleton using a precast concrete plate, which is characterized by constructing a skeleton. 5. The structural body using a precast concrete plate according to claim 4, wherein a reinforcing bar is arranged in the void portion, the reinforcing bar of the precast concrete plate is joined to the reinforcing bar, and then the concrete is poured. Construction method.