JPH09256515A - Precast wall slab and constructing method of building using the wall slab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate connection operation with another structural material, and to rationalize operation by forming a notch section to the peripheral section of a wall slab body and extending an embedded bar constituting a lap joint with a joint bar projected from another structural material into the notch section from the inside of the wall slab body. SOLUTION: A column member 20 and a wall slab 10 are joined in such a manner that a joint bar 21 is projected from the column member 20 as another structural material, the precast wall slab 10 is built, the joint bar 21 forms a lap joint with an embedded bar 12 in a notch section 11b, an opening 11c is closed by a frame plate 22 and a concrete placing space S1 is filled with concrete. Since the embedded bar 12 is disposed into the notch section 11b, the reinforcing bar for connection is arranged beforehand in the space S1, thus facilitating connection operation. When the wall slab 10 is joined with a coin member 20, the opening of the notch section 11b can be partitioned only by closing the opening by the frame plate 22, the leakage prevention, etc., of concrete may be conducted only in the periphery of the notch section 11b, and operation can be rationalized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast wall slab to be built by being joined to another structural material such as a pillar, a beam or a wall which constitutes a building in order to construct the building, and a building using the precast wall slab. It is about the construction method.

[0002]

2. Description of the Related Art Conventionally, as a method of constructing a building, there is a so-called precast construction method in which a wall member is manufactured in advance in a factory or the like and is carried into a construction site and built in the building. In this precast method, a full precast member in which almost all of the wall thickness of the constructed wall member is manufactured in advance is used, or a constructed wall such as a double wall or a PCF (single-sided thin precast plate). There are cases where a half precast member is used in which both wall surfaces and one wall surface of the member are thin-walled with concrete and reinforcing bars are arranged.

More specifically, the construction of the wall member using the full precast member has a wall thickness almost equal to the wall thickness of the constructed wall member, as shown in FIG. The full precast member 50 thus prepared is installed adjacent to a pillar 51 which is another structural material. At this time, the full precast member 50 is installed in the pillar 51 with a predetermined space S3. When the full precast members 50 are joined together, the full precast members 50 are installed so that a space S4 having a predetermined width is formed between them.

Next, in these spaces S3, S4, a lap joint is formed by the reinforcing bar 53 projecting from the side end surface of the full precast members 50, 50 and the joint reinforcing bar 54 projecting from the column 51, After that, form frames 56 and 57 are installed so as to surround the spaces S3 and S4, and concrete is placed inside them.

In this method, when the other structural material is a beam, the main reinforcement 55 projecting from the upper portion of the full precast member 50 is reinforced by a concrete casting form (which is assembled when the beam is constructed). The full precast 50 is integrated with the beam by placing it in a mold (not shown) and placing concrete in the mold.

On the other hand, in the construction of a wall member using a half precast member, for example, as shown in FIGS. 7 (a) and 7 (b), one side surface is thin-walled with concrete and the other side surface is reinforced. Using the half precast member 60 provided so that 61 is exposed, the concrete molded portion 60a of this is built so as to be located on the outer surface of the wall member to be constructed, and the frame plate 62 is fixed to the predetermined space S.
After installing 5 apart, concrete is poured in this space S5.

As another construction method using the half precast member, there is a so-called double wall construction method in which the half precast members 60 are built in a pair in parallel and concrete is placed between them.

[0008]

However, the above-mentioned precast method has the following problems. That is, when the full precast member 50 is used, the space S3, S, as described above, at the time of joining with another structural material.
4, the full precast member 50 must be built, and the molds 56 and 57 must be installed so as to surround the spaces S3 and S4. Therefore, it is necessary to take measures for preventing water leakage, deterioration of sound insulation performance, cracking, and the like across the front and back of the wall member to be constructed, and there is a problem that the work of installing the form becomes complicated.

Also, the full precast member 50 is
Since the entire member has a thickness substantially equal to the wall thickness of the wall member to be constructed, there is a problem that the weight is heavy and a large-scale hoisting equipment is required when installing the wall member.

On the other hand, in the case of using the half precast member 60, between the half precast member 60 and the frame plate 62, or a pair of half precast members 60, 6
Since concrete is poured between 0, the amount of concrete to be filled is enormous. Therefore, means such as compaction is required to improve the filling around the reinforcing bars of concrete, that is, the filling property. At the same time, there is a problem that the space S5 has to be made large and the wall thickness of the wall member to be constructed must be set large.

Further, the half precast member 60
When using a half precast member 60
Since the entire member is thin and it is necessary to dispose reinforcing bars on the back surface of the member, it is necessary to invert the member during molding during the manufacturing process of this, and special members are required during manufacturing. In addition, there is a problem that on-site production is difficult because large-scale equipment is required.

The present invention has been made to solve the above problems, and facilitates joining work to other structural materials such as columns and beams when constructing a building, thus saving labor in constructing the building. The purpose of the present invention is to provide a precast wall slab that can be rationalized and a building construction method using the same.

[0013]

In order to achieve the above object, in the precast wall slab of the present invention, a precast wall to be built in the building by being joined to another structural material such as a pillar, a beam or a wall constituting the building. In the plate, the peripheral portion of the plate-shaped wall slab body is thinned by forming a notch, and the embedded muscle forming a lap joint with the joint muscle protruding from the other structural material is It extends from the inside of the wall slab body into the notch (claim 1).

According to such a precast wall slab, since the embedding streaks constituting the lap joint are arranged in the notch at the peripheral portion of the wall slab body, when the precast wall slab is installed, it is already Since the reinforcing bars for joining are laid in the concrete placing space, it is possible to quickly perform the subsequent work of placing concrete.

Further, in this precast wall slab, only the peripheral portion which is a joint with another structural material is thinned, so that the member is lightweight and the manufacturing is easy, and at the site work, Since it is only necessary to place concrete at this joint, a small amount of concrete is required,
Processing and management for improving the filling property are facilitated, and labor in the field can be saved.

Further, in the precast wall slab, it is preferable that a supporting bar for holding the embedded bar project from the thinned peripheral part into the cutout part (claim 2).

According to such a precast wall slab, it is possible to integrate the thinned peripheral edge portion with the embedded reinforcement via the support reinforcement, and the support reinforcement functions as a spacer during concrete pouring. As a result, it is possible to sufficiently secure the cover thickness of the embedded reinforcement and the joint reinforcement, and it is possible to improve the proof stress against the lateral pressure of the thin portion of the concrete.

On the other hand, the building construction method of the present invention is a method for constructing a building by joining the above-mentioned precast wall slab to the other structural material, and in addition to projecting joint streaks from the other structural material, The precast wall slab is built so that the joint bar forms a lap joint with the embedded rebar in the cutout portion, and the opening of the cutout portion is closed with a frame plate to define a concrete placing space. The casting space is filled with concrete (claim 3).

In such a building construction method, when the precast wall slab is joined to another structural material, the notch is closed by a frame plate to define a concrete pouring space, and concrete is poured here. Since it can be integrated with other structural materials by itself, the amount of concrete to be poured on site can be minimized. In addition, the concrete pouring space can be defined by simply closing the opening of the cutout with a frame plate, so it is sufficient to perform processing such as concrete leakage prevention only in this cutout, and the work can be rationalized. it can.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the precast wall slab of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows a precast wall slab 10 according to this embodiment. In this embodiment, the precast wall slab 10 is joined to another structural material such as a pillar, a beam, a wall or the like that constitutes the building in order to construct a wall member of the building.

As shown in the figure, the precast wall slab 10 includes a plate-shaped wall slab body 11 having a peripheral edge portion 11a,
By forming a cutout portion 11b in 11a, the peripheral portion 11
It is configured such that a and 11a are thinned and the embedded streak 12 is extended from the inside of the wall slab body 11 to the inside 11b of the notch.

The wall slab body 11 is a concrete plate-like member having a thickness approximately equal to the wall thickness of the wall member to be constructed, and a large number of embedded reinforcements 12 are arranged in a lattice in the interior thereof. Has been done. In the present embodiment, the frame plate 2 described later
An insert 24 into which the bolt 23 is screwed when the 2, 31 are mounted is driven.

The notches 11b are provided so as to communicate with both sides and the upper peripheral edge of the precast wall slab 10. In the present embodiment, the cutout portion 11b is installed so that the precast plate 10 is located on the outer surface of the wall member on which the thinned concrete portion is constructed, so that the opening faces the inside of the building. Will be installed.

Then, as shown in FIG. 5, the notch 11b is formed by the following procedure in the process of manufacturing the precast wall slab 10 using the panel manufacturing form 70. First, as shown in FIG.
A plate-shaped bed 71 that forms the bottom surface of 0 is installed, and a pair of frame plates 72, 7 are provided so as to surround the upper space of the plate-shaped bed 71.
2 and a connecting plate 73 that connects both ends of the frame plates 72, 72. The heights of the frame plates 72 and 73 are set to be substantially equal to the wall thickness of the precast wall slab 10.

Next, a dam plate 74 is arranged between the frame plates 72, 72 arranged opposite to each other. The dam plate 74 is framed by a frame plate stopper metal fitting 74a so as to be parallel to the connecting plate 73 arranged at the end of the frame plate 72 and to secure a predetermined distance 1 from the connecting plate 73. It is connected to the middle of the plate 72.

The barrier plate 74 is a rectangular iron plate, and is provided with a large number of slits 75 at predetermined intervals in the longitudinal direction thereof, and has a comb shape as a whole. This slit 7
As shown in FIG. 5B, reference numeral 5 is a cutout in the height direction from the lower end surface 74b when the barrier plate 74 is arranged between the frame plates 72, 72. The formation position corresponds to the bar arrangement position of the embedded muscle 12 to be arranged later, and the cut length is formed to correspond to the height of the truss-shaped reinforcing bar 13 described later.

Further, as shown in FIG. 3A, the lower end surface 74b of the barrier plate 74 is connected to the frame plate 72 at a predetermined distance from the upper surface of the bed 71. 7
A gap h is formed below 4. That is, this gap h becomes the wall thickness of the thinned peripheral portion 11a when the precast wall slab 10 is manufactured, and the height of the barrier plate 74 becomes the depth of the notch 11b.

Thereafter, the embedding bars 12 and the truss-shaped reinforcing bars 13 joined thereto are arranged in the panel manufacturing form 70 while being inserted into the slits 75, and then the concrete C is placed in the panel manufacturing form 70. To place. At this time, it is preferable that the concrete C is cast in two steps. That is, first, the first-stage concrete is cast up to the lower end surface 74b of the barrier plate 74 to reduce the thickness of the peripheral edge portion 11a.
After forming the portion, and after it exhibits the required strength, the second-stage concrete is further cast to form the wall slab body 11 portion.

After the entire concrete C has hardened, the frame plates 72, 72, the connecting plate 73 and the bed 71
To remove the mold and finish the work. At this time, in the present embodiment,
Since the barrier plate 74 is formed of an iron plate, the precast wall plate 10
Can be left inside.

In the present embodiment, the cutout portion 11b is formed.
, The one provided on both sides of the precast wall slab 10 communicates with the one provided on the upper part. However, the present invention is not limited to this, and it may be formed on both sides and the upper part independently. Good.

An embedding streak 12 extending from the inside of the wall slab body 11 is disposed in the notch 11b. The embedded muscles 12 have their ends protruding from the inside of the wall slab body 11 into the insides of the cutout portions 11b, and a large number of protruding from the inside of the thinned peripheral portion 11a toward the insides of the cutout portions 11b. It is held by a truss-shaped reinforcing bar 13 as a supporting bar.

The embedding bars 12 are arranged in a grid pattern inside the wall slab body 11 in the same manner as ordinary rebars, and the ends thereof are cut out 1
1b and a lap joint with a joint streak (which will be described later) projecting from another structural material, which constitutes a lap joint. After construction, between the precast wall slab 10 and the other structural material. , Is responsible for transmitting the stress acting between them.

The truss-shaped reinforcing bar 13 is, as shown in FIG.
Four reinforcing bars are arranged in the shape of a quadrangular pyramid, and the tops thereof are joined to the embedded bars 12 by welding or the like. The leg portions of the truss-shaped reinforcing bars 13 arranged in the shape of a quadrangular pyramid are embedded in the thinned peripheral portion 11a and are connected to the reinforcing bars inside the peripheral portion 11a.

According to the precast wall slab 10 having such a structure, only the peripheral edge portion 11b, which is a joint portion with another structural member, is thinned, so that the member is lightweight and the manufacturing is easy.

Further, in this embodiment, the peripheral portion 11a is
Since the truss-shaped reinforcing bar 13 is provided so as to project, the peripheral edge portion 11b and the embedded reinforcing bar 12 can be integrated through this, and the strength of the peripheral edge portion 11b can be improved, and the proof stress against the lateral pressure by the concrete can be improved. Can be improved.

Next, a work procedure of a method of constructing a building using the precast wall slab 10 having the above-mentioned structure will be described. First, as shown in FIG. 2, before the precast wall slab 10 is built, or prior to this, a pillar member 2 which is another structural material.
The joint muscle 21 is projected from 0.

The joint bar 21 is attached when the column member 20 is constructed by cast-in-place concrete, when the internal rebar of the column member 20 is assembled, and when the column member 20 is precast. It is preferable that the precast column member is preliminarily driven with the joint bar 21 or that the precast member is provided with a means such as an insert for attaching a reinforcing bar in advance.

Next, the precast wall slab 10 is built.
At this time, the joint bar 21 forms a lap joint with the embedded rebar 12 in the notch 11b. Further, when the precast wall slab 10 is built, the side end surface 11d of the peripheral portion of the thinned precast wall slab 10 is brought into contact with the joint surface 20a of the column member 20.

More specifically, when the pillar member 20 is constructed of cast-in-place concrete, the side end surface 11d is fixed to the pillar member 2.
Only let it be zero. When the pillar member 20 is precast, the side end surface 11d of the peripheral edge portion 11b is reduced in order to reduce cross-sectional defects between the pillar member 20 and the precast wall slab 10.
A taper is provided on the column member 2 and this taper is used.
It is brought into contact with the joint surface 20a of 0. This makes it possible to simplify the process of preventing concrete from leaking from the outer surface of the constructed wall member.

In this embodiment, the leg portion of the precast wall slab 10 is fixed by connecting the beam reinforcement of the already constructed lower beam member and the vertical reinforcement of the precast wall slab 10 with a sleeve joint. By.

After that, the opening 11c of the notch 11b is closed by the frame plate 22 to define the concrete placing space S4. The frame plate 22 is commonly used as a frame plate for a concrete casting formwork, and an iron plate, a veneer plate or the like can be used. Then, the frame plate 22 is attached by screwing the bolts 23 into the inserts 24 that are previously driven into the peripheral edge of the wall slab body 11.

Also, a plurality of precast wall slabs 10, 10
2 and 3 (a), (b) when joining each other
As shown in Fig. 5, in order to reduce the cross-section loss of the wall plate at the joint portion, the side walls 11d and 11d of the thinned peripheral portions of the precast wall slabs 10 are provided with the taper 25 and the side surfaces 11d and 11d. Are placed in contact with each other with a predetermined distance d, and then, each of these embedded muscles 12, 1
Stretch the joint muscle 30 between the two.

As described above, by providing the interval d, it is possible to absorb some accuracy error when the precast wall slab 10 is built, and when concrete is placed, the interval d is kept within this interval d. Filled with concrete,
The joining of the precast wall slabs 10 and 10 can be made stronger. In addition, preferably, the sealing is simply performed at this interval d.

Further, in the present embodiment, the joint muscle 30 is, as shown in detail in FIGS. 3 (a) and 3 (b),
It has a grid shape to facilitate its installation work. Then, after the work of attaching the joint streak 30 is completed, as shown in FIG. 2, the openings of the cutouts 11b, 11b are closed by the frame plate 31 to define the concrete pouring space S2.

In this embodiment, since a beam member (not shown) is constructed above the precast wall slab 10,
The same operation as the above-described pillar member is performed on the embedded reinforcement 12 on the upper part and the beam reinforcement of the beam member. In this case, the notch 11b
Since a space for placing concrete is secured by this, it is possible to easily place concrete at a joint portion with a beam member, which has been conventionally difficult to place concrete.

Further, in the present embodiment, since the floor slab (not shown) is constructed together with the construction of the precast wall slab 10, the construction of the floor slab is carried out concurrently with the construction work of the precast wall slab 10. Do the work.

After the work of building the precast wall slab 10 is completed, concrete is filled in the concrete placing spaces S1 and S2. In this embodiment, it is preferable to press-fit the concrete using a pump or the like in order to further improve the filling property. Then, after the concrete is hardened, the frame plates 22 and 31 are removed and the work is completed.

According to such a building construction method, since the embedding streak 12 constituting the lap joint is arranged in the notch 11b of the wall slab body 11, when the precast wall slab 10 is installed. Since the reinforcing bars for joining have already been arranged in the concrete placing spaces S1 and S2, the subsequent operation of placing concrete can be performed quickly.

When the precast wall slab 10 is joined to another structural material, the opening of the notch 11b is formed into the frame plates 22 and 31.
Since it can be defined only by closing it with, it is sufficient to perform processing such as concrete leakage prevention only around the cutout portion 11b, and the work can be rationalized.

As a modified example of this embodiment, when a beam member is constructed above the precast wall slab 10, the thinned peripheral edge portion 1 above the precast wall slab 10 is used.
1a can also be used as a precast formwork forming the outer surface of the beam member to be constructed. In this case, it is preferable that a beam form is formed by the peripheral edge portion 11a and the frame plate, a beam main bar and the like are laid in the beam frame, and concrete is poured therein. According to this, the side surface of the constructed beam member and the wall surface of the wall member can be flush with each other.

[0051]

As described above in detail, according to the precast wall slab according to the present invention having the above-described structure, the embedded lap joint is formed in the notch at the peripheral edge of the wall slab body. Since the reinforcements are arranged, when this precast wall slab is built, the reinforcing bars for joining have already been arranged in the concrete placing space, and the work of placing the concrete after that can be done quickly. It can be carried out.

Furthermore, in this precast wall slab, only the peripheral edge portion, which is a joint portion with other structural materials, is thinned, so that the member is lightweight and easy to manufacture, and in the field work, It suffices to place concrete only in this joint portion, and labor in the field can be saved.

Further, as in the precast wall slab according to claim 2, from the thinned peripheral edge portion to the cutout portion,
If the supporting muscles for holding the embedded muscles are provided in a protruding manner, it is possible to integrate the thinned peripheral portion and the embedded muscles through the supporting muscles, and it is possible to improve the strength of the peripheral portion,
It is possible to improve the proof stress against lateral pressure of the thin portion of the concrete.

On the other hand, according to the building construction method of the third aspect of the present invention, the concrete pouring space is defined by closing the notch with the frame plate, and another structure is obtained by pouring concrete into the space. Since it can be integrated with the material, the amount of concrete poured on site can be minimized. In addition, the concrete pouring space can be defined by simply closing the opening of the cutout with a frame plate, so that measures such as concrete leakage prevention should be done only around this cutout and the work can be rationalized. You can

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a precast wall slab of the present invention.

FIG. 2 is a cross-sectional view showing a work procedure of a building construction method according to the present invention.

3A and 3B are explanatory views showing a work procedure of the building construction method according to the present invention, in which FIG. 3A is a cross-sectional view thereof, and FIG. 3B is a plan view (front view) seen from above.

FIG. 4 is an enlarged perspective view showing an embedding muscle and a supporting muscle arranged in the precast wall slab of the present invention.

FIG. 5 is an explanatory view showing a panel manufacturing form used in manufacturing the precast wall slab of the present invention.

FIG. 6 is a perspective view showing a method of installing a conventional precast wall slab.

7A and 7B are explanatory views showing a method of installing a conventional precast wall slab, in which FIG. 7A is a transverse sectional view thereof, and FIG. 7B is a sectional view taken along line AA in FIG.

[Explanation of symbols]

 10 Precast Wall Slab 11 Wall Slab Main Body 11a Peripheral Edge 11b Notch 12 Embedded Bar 13 Truss Reinforcing Bar (Support Bar) 21,30 Joint Bar 22,31 Frame Plate S1-5 Concrete Placing Space

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location E04B 2/56 611 E04B 2/56 611D 621 621A 621R 632 632B 632C 632R

Claims (3)

[Claims] 1. A precast wall slab that is built in a building by being joined to another structural material such as a pillar, a beam, or a wall that constitutes the building, wherein a peripheral portion of a plate-shaped wall slab main body has a cutout portion. To form a thin wall, and a joint streak protruding from the other structural material and an embedded streak constituting a lap joint are extended from the inside of the wall slab body into the notch. Precast wall version. 2. A precast wall slab characterized in that a supporting bar for holding the embedded bar projects from the inside of the thinned peripheral section into the notch section. 3. A method for constructing a building by joining the precast wall slab according to claim 1 or 2 to the other structural material, wherein a joint bar is projected from the other structural material and the joint bar is formed. Builds the precast wall slab so as to form a lap joint with the embedded rebar in the notch, and defines an opening for the notch with a frame plate to define a concrete pouring space. A method of constructing a building, characterized by filling concrete inside.