JPH0726644A - Method for constructing parapet - Google Patents

Abstract

PURPOSE:To construct a parapet with high accuracy by a simple construction process without imposing heavy labor on workers and to reduce construction cost by restraining the amount of plywood forms to be used. CONSTITUTION:An outer form 10 and an inner form 20 comprising precast driven form are supported and fixed spaced a predetermined interval from each other on the perimeter of the top end 11 of a building structure to form spaces S, S' for placement of concrete having an upwardly directed opening. Thereafter concrete C is placed in the spaces S, S', which concrete C is then cured to construct a parapet.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method for constructing parapets in a building structure.

[0002]

2. Description of the Related Art As is well known, on the roof of a concrete structure, a parapet extending upward is provided on the peripheral edge of the roof slab for the purpose of treating the end of the waterproof layer.

As an example of such a parapet, a parapet head 1 shown in FIG. 5 is known. The parapet board 1 has a head portion 3 integrally provided at an upper end of a rising portion 2 and protruding toward a central portion of a roof slab (not shown). In this parapet board 1, the end of the waterproof layer 4 is fixed by the presser metal 5 below the corner formed by the rising portion 2 and the headwood 3 and the presser metal 5 and the lower end surface of the headwood 3 are joined together. The gap is subjected to a caulking process in which the sealing material 6 is filled. In addition, a drainage joint 7 that opens downward is formed on the lower end surface of the head part 3, and a joint 8 that opens downward along the drainage joint 7 is formed inside the drainage joint 7. Has been formed. The upper end of the protective panel 9 is fitted to the joint 8, and the protective panel 9 is configured to protect the waterproof layer 4 attached to the rising portion 2.

When constructing the parapet 1
First, as shown in FIG. 6, the outer formwork 10 is arranged along the already constructed outer wall skeleton (not shown), and the spacer block 12 is placed on the upper end reinforcing bar R of the roof slab 11. And, the first inner formwork 13 of a flat plate made of plywood formwork
Is supported and fixed by the frame support member 14 on the spacer block 12 so as to face the outer frame 10 at a predetermined interval. That is, the pecon 14b is connected to both ends of the separator 14a, and thereby the first inner mold 13 and the outer mold 10 are held at a predetermined interval, and the first inner mold 13 and the outer mold 10 are provided outside the pecon 14b. 10 to connect the foam tie attachment metal fittings 14c, and the flap material 15 on the spacer block 12 to the first position.
In addition to being arranged along the outer longitudinal direction of the inner mold form 13, a round steel pipe 16 is arranged so as to be orthogonal to the splint 10a of the outer mold form 10, and the form tie 14d is connected to the form tie mounting bracket 14c. Then, the butter material 15 and the round steel pipe 16 are tightened to form a concrete placing space S opening upward. Then, at the same time as placing the concrete of the roof slab 11, concrete C is placed in the concrete placing space S, and the concrete joining surface A with the rising portion 2 of the parapet headstock 1 is located at a position higher than the upper surface of the roof slab 11. Set up.

Next, as shown in FIG. 7, reinforcing bars R'are arranged in the rising portion 2 and the head portion 3 so as to have a predetermined covering thickness. Then, a second inner formwork 17 made of a plywood formwork is provided, and like the first inner formwork 13, the formwork support 1 is arranged so as to face the outer formwork 10 at a predetermined interval.
A joint material 1 for supporting and fixing by means of 4 and for forming joints for draining water and protective panel receiving grooves on the horizontal member 17a forming the head portion 3 of the inner formwork 17.
8 and 19 are arranged and the form F is assembled. Then, concrete is placed in the concrete placing space S'formed by the form F. Then, as shown in FIG. 5, the waterproof layer 4 is attached, the end portion thereof is treated, and the protection panel 9 is installed to construct the parapet frame 1.

[0006]

However, the conventional construction method using the above-mentioned plywood form has the following problems. When constructing the parapet shed 1, the rising portion 2 must be divided into predetermined heights and spliced together as described above, and when constructing the shed portion 3, a horizontal member located at the lower end thereof is constructed. The joint material 18 for draining water and the joint material 19 for groove of the panel receiver must be arranged in 17a.
The assembling work of the second inner formwork 13, 17 involves a very troublesome process, and in order to construct a parapet headstock having a highly accurate cross section, a so-called formwork carpenter or the like having a considerably skilled skill is used. Skilled workers need to do the work. However, there is a problem that it is difficult to secure them today and the construction period is prolonged because of lack of skilled workers. The construction work of the parapet headstock 1 should be done in a very difficult place such as the periphery of the roof slab 10,
In particular, the disassembling work of the second inner formwork 17 and the joint materials 18 and 19 has to be performed by the worker having to bend his or her waist, which is a pain. The first and second inner formwork 13 of the parapet Kasaki 1,
17, the number of diversions is less than other formwork for skeletons,
Nowadays, it is uneconomical in terms of construction cost, and there is a demand for some kind of solution in today's demand for reduction of the amount of plywood formwork used.

The present invention has been made in view of the above-mentioned problems, and the construction process is simple, and it is possible to construct a parapet with high construction accuracy without imposing heavy labor on workers, and use of a plywood formwork. It is an object of the present invention to provide a method for constructing a parapet that can suppress the amount and reduce the construction cost.

[0008]

SUMMARY OF THE INVENTION The present invention is a concrete pouring space in which an outer formwork and an inner formwork are supported / fixed at predetermined intervals on the peripheral edge portion of a building structure and opened upward. Forming, then placing concrete in the concrete placing space, relates to a method of constructing a parapet in a building structure that is cured, characterized in that the inner formwork is made of a precast drive formwork There is.

[0009]

In the method for constructing a parapet according to the present invention, the outer formwork and the inner formwork made of a precast driving formwork are supported and fixed at the peripheral edge of the building structure at a predetermined interval. As a result, a concrete placing space that opens upward is formed. Then, concrete is placed in the concrete placing space, and the placed concrete is hardened to construct a parapet integrated with the inner formwork.

[0010]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The parts common to those shown in FIGS. 5 to 7 shown as the conventional example are designated by the same reference numerals and the description thereof will be omitted.

FIG. 1 shows an embodiment of a structure for supporting a formwork in the method for constructing a parapet according to the present invention. Concrete C is placed in the formwork to form a parapet head tree 1 (parapet). Is being built.

As shown in FIG. 1, an inner formwork 20 and an outer formwork 10 are provided at the periphery of a roof slab 11 (top end) of a building structure.
And are arranged to face each other with a predetermined interval. In the concrete placing spaces S and S'opened upward formed by the inner mold 20 and the outer mold 10, the reinforcing bars R'are arranged so as to have a predetermined cover thickness, and Concrete C is placed so as to bury the reinforcing bar R ′.

Similar to the conventional example, the outer mold 10 disposed along the outer wall (not shown) is a plywood mold, and the inner mold 2
Reference numeral 0 is a precast driving mold manufactured in advance by a method such as mold injection molding or extrusion molding at the factory. The inner frame 20 is made of high-strength cement mortar, fiber-reinforced cement mortar, or the like, and its cross-sectional shape may be solid or hollow.

The inner formwork 20 extends upward from the lower end.
A mold having a substantially L-shaped cross-section (hereinafter, referred to as "L-form") 20a, a plate-shaped rising part (hereinafter, referred to as "I-form") 20b, and a cross section. The mold is composed of three divided molds into a substantially Z-shaped formwork (hereinafter, referred to as “Z form”) 20c for a head part, and these divided molds are
The longitudinal direction is also divided into predetermined lengths. Also,
The upper end portion of the L-shaped frame 20a and the head portion 3 of the Z-shaped frame 20c
The part which forms the protruding end of the mold supporting member 14
A horizontal hole for inserting the foam tie attachment metal fitting 14c is formed. Further, the height of the upper end portion of the L-shaped frame 20a is set to be substantially equal to the concrete joint surface A of the rising portion 2 and also forms the lower end surface of the head portion 3 of the Z-shaped frame 20c. At the site, a drainage joint 7 that opens downward and a joint 8 for fitting a protective panel that is provided inside the drainage groove (on the left side in the drawing) and that opens downward are respectively provided in the Z form frame. It is formed along the longitudinal direction of 20c.

The divided molds are vertically joined by fitting the end portions or the lower end portions thereof into the fitting recesses in the vertical direction of the joining member 21 having a substantially H-shaped cross section. And L
The mold support member 14 is attached at the height position of the holes formed in the mold 20a and the Z mold 20c. With this mold support member 14, as in the conventional example shown in FIG.
And the outer frame 10 are supported and fixed at a predetermined interval.

Next, a method for constructing a parapet using the above-described formwork support structure will be described. First, as shown in FIG. 2A, the spacer block 12 is arranged on the upper end reinforcing bar R of the roof slab 11, and the L-shaped frame 20 a is arranged on the spacer block 12. The L frame 20a and the outer frame 10 arranged along the already constructed outer wall skeleton (not shown) are supported by the frame support member 14 so as to face each other at a predetermined interval. It is fixed and the concrete pouring space S is formed. Concrete is placed in the concrete placing space S such that the joining surface A of the rising portion 2 is located at a position higher than the upper end surface of the roof slab 11. At this time, a splicing joint material 22 is arranged on the outer formwork 10 side of the splicing surface A (see FIG. 2B).

Next, after the cast concrete is hardened, as shown in FIG. 2B, the foam tie 14d on the side of the L-frame 20a, the flap 15 and the foam tie mounting metal fitting 14c (FIG. 2A). (Refer to FIG. 2), and at the same time, the reinforcing bar R ′ is arranged so that the rising portion 2 and the head portion 3 of the parapet head tree 1 to be constructed have a predetermined cover thickness.

Further, as shown in FIG. 3 (a), the lower fitting recess of the joining member 21 is fitted to the upper end of the L-shaped frame 20a, and the I fitting is fitted in the upper fitting recess of the joining member 21. The lower end of 20b is fitted and joined. Then, another joining member 21 is similarly fitted to the upper end of the I-frame 20b, and further, the lower end of the Z-frame 20c is fitted to the upper fitting recess of the joining member 21. Then, the frame support member 14 is attached to the holes formed in these Z frames 20c to attach the outer frame 10 to the outer frame 10.
And the inner formwork 20 are supported and fixed at a predetermined interval to form a concrete pouring space S '. Here, in order to prevent distortion due to concrete pouring, a support 23 is provided on the lower end surface of the horizontal portion of the Z form frame 20c.

Then, concrete C is placed in the concrete placing space S ', and after the concrete C is hardened, the foam tie 14d, the round steel pipe 16, the foam tie mounting metal fitting 14c, the outer mold 10 and the pecon 14b are removed. , The surface of the parapet after removing the outer mold 10 is applied.

Further, the waterproof layer 4 is attached from the upper surface of the roof slab 11 to the lower side of the Z form 20c of the inner form 20, and the end portion thereof is fixed by the press metal 5, and the press metal 5 and the Z type. A caulking process is performed on a gap between the lower end surface of the horizontal portion of the frame 20c. Then, the heat insulating material 24 is arranged on the lower end of the L-shaped frame 20a and the upper surface of the roof slab 11, and a predetermined corner cushion material 25 is attached to the L-shaped frame 20a on the upper part of the heat insulating material 24, and pressing concrete 26 is cast. To do. Further, the upper end of the protection panel 9 is fitted and fixed in the joint 8 of the Z form 20c, and the construction of the parapet headstock 1 is completed.

In the method of constructing the parapet headstock 1 of the above-mentioned embodiment, the outer formwork 10 and the inner formwork 20 comprising the precast driving formwork are provided on the peripheral portion of the roof slab 11 of the building structure.
And are supported and fixed at a predetermined interval, and concrete placing spaces S and S'opening upward are formed. And
Concrete is placed in the concrete placing spaces S and S ′, and the placed concrete C is hardened to construct the parapet headstock 1 integrated with the inner formwork 20.

As described above, according to the construction method of the parapet headstock 1 of the above-mentioned embodiment, the precast driving form is used for the inner form 20, and the inner form is formed at the peripheral portion of the roof slab 11 of the building structure. The mold 20 and the outer mold 10 are supported and fixed at a predetermined interval to form concrete pouring spaces S and S'opening upward, and the concrete pouring spaces S,
Since the concrete C is poured and cured in S ′, the following effects can be obtained. Since the inner formwork 20 is a precast product manufactured in advance in a factory, it eliminates the need for surface trimming and plastering repairs, and a highly accurate concrete cross section can be obtained.
Therefore, reliable waterproof treatment can be performed,
It is possible to construct the parapet headstock 1 with high construction accuracy. The inner formwork 20 is an L formwork 20a, depending on the construction process.
Since it is divided into the I-form frame 20b and the Z-form frame 20c, even an unskilled worker can easily attach it and improve work efficiency on site. Further, since the work of mounting and disassembling the joint material and the work of disassembling the inner formwork are unnecessary, the worker is not forced to perform heavy labor on site. Since the amount of plywood formwork that is used less often can be reduced, the amount of waste materials and remaining materials can be reduced, and the disposal of the waste materials can be done without difficulty, and the total construction cost can be reduced. it can.

In the above embodiment, the inner formwork 2 is used.
L-shaped frame 20a for corners and I-shaped frame 20 for rising parts
It was divided into three parts, b and Z form frame 20c for the head part, but L
It is also possible to integrally form the form 20a and the I form 20b, and join the Z form 20c to this to form the inner form 20. Further, the L form 20a can be attached to the I form 20b. And the Z form 20c may be joined together, or the L form 20a, the I form 20b and the Z form 20c may be integrally formed to form the inner form 20. It is possible to obtain the same operation and effect as in the above embodiment.

Further, as shown in FIG. 4, a plywood form 27 is used in place of the I-form for the rising part of the above-mentioned embodiment, and the plywood form 27 is flapped at the upper end of the L-form 20a. Material 1
5, and is fixed by a fixing jig 28 composed of bolts and fixing nuts at the lower end of the Z formwork 20c to form a concrete pouring space S '. The parapet headstock 1 may be constructed by placing concrete C in the placement space S ′, and in this case also, the same effect as that of the above-described embodiment can be obtained.

[0025]

According to the method for constructing a parapet according to the present invention, a precast driving form is used as the inner form, and the inner form and the outer form are formed in the peripheral portion of the roof slab of the building structure. By supporting and fixing and with a predetermined interval to form a concrete pouring space that opens upward, concrete was poured into this concrete pouring space to construct a parapet, so the following effects Can play.

Since the inner formwork is a precast product that is manufactured in advance in a factory, it is not necessary to chip the surface or repair plastering, and a highly accurate concrete cross section can be obtained. Therefore, highly reliable waterproof treatment can be performed, and a parapet with high construction accuracy can be constructed. It can be installed easily even by a non-skilled worker, has good workability on site, and does not require dismantling work of the inner formwork after concrete is placed, so that workers are not forced to do heavy work. By reducing the amount of plywood formwork used for the inner formwork, which has a small number of diversions, the amount of waste materials and remaining materials is reduced, and it is possible to obtain the effects of not having to worry about the disposal of the formwork, thus reducing the total construction cost. can do.

[Brief description of drawings]

FIG. 1 is a side sectional view of an essential part showing an embodiment of a formwork support structure in a parapet construction method according to the present invention.

FIG. 2 is a diagram showing a process for constructing a parapet by the support structure of the embodiment, (a) is a side sectional view of an essential part showing a support structure of the mold at the corner, and (b) is a rising part. FIG. 3 is a side sectional view of a main part showing a bar arrangement state of a head and tree part.

FIG. 3 is a diagram showing a process of constructing a parapet by the support structure of the embodiment, (a) is a side sectional view of an essential part showing a situation in which the molds of the rising part and the head part are assembled; Is
It is a principal part side cross-sectional view which shows the parapet frame which completed the construction.

FIG. 4 is a side sectional view of an essential part showing another embodiment of the support structure for the formwork in the method for constructing the parapet according to the present invention.

FIG. 5 is a side sectional view of a main part showing the structure of a conventional parapet.

FIG. 6 is a side sectional view of an essential part showing a conventional structure for supporting a mold at a corner of a parapet.

FIG. 7 is a side sectional view of an essential part showing a supporting structure of a mold in a rising portion and a head portion of a conventional parapet.

[Explanation of symbols]

 1 Parapet 10 Outer formwork 11 Top tip 20 Inner formwork S, S'Concrete placement space

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masato Yamada 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation

Claims (1)

[Claims] 1. An outer formwork and an inner formwork are supported at a peripheral edge portion of a building structure along the peripheral edge portion at a predetermined interval.
In a method of constructing a parapet in a building structure, which is fixed and forms a concrete pouring space that opens upward, and then pouring concrete in the concrete pouring space, and hardening the concrete, the inner formwork is precast. Parapet construction method, characterized in that it consists of a driving form of.