JPH06200533A - Bent pc foundation form and foundation construction method using it - Google Patents

Abstract

PURPOSE:To simplify the construction work for foundations such as a cubicle frame foundation, parapet, machine foundation, etc., and also shorten the work period. CONSTITUTION:A bent PC foundation form 10 comprises an upper form 10a and a lower form 10b each formed with the bent PC boards. The lower forms 10b are put on a floor surface 22, and the upper forms 10a are fixed to the top of the lower forms 10b. When the lower forms 10b are put on the floor surface 22, mortar 28 is provided between them, and the lower forms 10b are fixed to the floor surface 22 by the mortar 28. After the bent PC foundation forms 10 are fixed to the floor surface 22, concrete is deposited in the bent PC foundation forms 10 and, after the concrete has been cured, a water-resistant asphalt layer is coated on the surfaces ranging from the outside of the lower forms 10b to the upper surface of the floor surface 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending PC foundation form used for a cubicle platform foundation, a parapet and various machine foundations installed on the floor of a rooftop floor or a basement floor, and a method of constructing a foundation using the same. .

[0002]

2. Description of the Related Art Buildings are generally RC or SR
It is built by C structure, but in this building, a power panel, a drive panel and various equipment machines are installed on the roof floor or basement floor. At the time of installation, it is designed so that it can be installed on a foundation protruding from the floor. By the way, generally, the foundation is constructed by retrofitting at a mounting position of the facility device after the construction work of the building is completed. Further, as a foundation constructed by retrofitting from the floor in this way, a parapet projecting on the outer peripheral edge of the roof is known.

FIG. 15 shows an example of a conventional parapet 1, which is projected in an inverted L shape on the peripheral edge of the rooftop floor. The parapet 1 has a vertical bar 2a and a horizontal bar 2b arranged therein, and then concrete 3 is placed therein, and the outside thereof is leveled with a mortar 4. Further, although the inside of the parapet 1 is waterproofed, a leveling mortar 5 is formed extending from the inside of the parapet 1 to the floor surface, an asphalt waterproof layer 6 is formed on the upper side thereof, and further on the upper side thereof. A polyethylene sheet 7 is laid. Then, the lath mortar 8 continuous from the parapet 1 is placed on the upper side of the polyethylene sheet 7.

[0004]

However, in such a conventional foundation construction method, for example, the parapet 1 is used.
After the reinforcing bars 2a and 2b are laid out as shown in Fig. 2, a formwork (not shown) is attached and the concrete 3 is placed. After that, the formwork is dismantled and the mortar 4 is constructed and Waterproof treatment is performed by the mortar 5, the asphalt waterproof layer 6, the polyethylene sheet 7, and the like. Therefore, various works are required to construct the parapet 1, and formworkers, reinforcers, plasterers, etc., each having a different type of work, sequentially carry out the work step by step. For this reason, the structure of the parapet 1 is remarkably complicated, and many craftsmen are required to simply project from the floor surface of the skeleton. Due to a shortage of workers in recent years, it is difficult to smoothly deliver each type of craft. There were various problems that the construction period was lengthened.

Therefore, in view of the conventional problems, the present invention makes it possible to simplify the construction work of the foundation and shorten the construction period, and a method of constructing a foundation using the same. The purpose is to provide.

[0006]

In order to achieve the above object, the folding PC foundation form of the present invention corresponds to a corner portion of a foundation shape to be constructed, such as a cubicle platform foundation, a parapet or a machine foundation. A bent PC plate having a bent portion is formed, and the bent PC plate is bent from this bent portion so as to surround the outside of the foundation to be constructed.

Further, in order to achieve such an object, the method of constructing a foundation of the present invention is to provide a folding PC foundation form surrounding the outside of the foundation to be constructed, such as a cubicle base foundation, a parapet or a machine foundation. , This bending PC
After the foundation formwork is installed on the floor, concrete is placed in the folding PC foundation formwork, and after the concrete is hardened, the concrete form is straddled between the outside of the folding PC foundation formwork and the upper surface of the floor. Apply a waterproof layer.

Further, in order to achieve such an object, the method of constructing the foundation of the present invention is to provide a bent PC foundation form surrounding the outside of the foundation to be constructed, such as a cubicle base foundation, a parapet or a machine foundation. , This bending PC
While placing the foundation formwork on the floor formwork and floor reinforcement after raising a predetermined height from the bottom of the floor formwork, place concrete on the floor formwork and place concrete in the bent PC foundation formwork. Installed and bent PC after hardening these concrete
A waterproof layer will be installed across the outside of the basic formwork and the upper surface of the floor.

[0009]

In the folding PC foundation form of the present invention having the above-mentioned structure, the foundation to be constructed, such as the cubicle platform foundation, the parapet or the machine foundation, by folding from the folding portion of the folding PC plate. It can be easily surrounded along the outside of the mold and the form can be easily arranged. Further, by using the mold as a PC plate, the concrete cast in the mold and the bent PC basic mold can be integrated, and the work of removing the mold can be omitted.

Further, in the method of constructing a foundation using such a bent PC basic formwork, the mounting of the formwork can be completed only by installing this bent PC base formwork on the floor surface. The work of mounting this form can be significantly simplified. Also, after the concrete placed in the formwork installed on the floor surface is hardened, a waterproof layer is applied across the outside of the bent PC base formwork and the top surface of the floor surface, making the waterproofing process simple. Can be done.

Further, according to the foundation construction method of the present invention, the bent PC foundation form is placed on the floor formwork and the floor formwork in a state where a predetermined height is lifted from the bottom of the floor formwork after the floor reinforcement work. By pouring concrete and pouring it into the bent PC foundation formwork, the concrete of the floor formwork and the foundation are joined together and integrated, and the strength of the foundation can be significantly improved. . Further, the foundation can be constructed at the same time as the floor formwork, and the work steps for constructing the foundation can be reduced.

[0012]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. 1 to 7 show an embodiment of a folding PC foundation mold and a method of constructing a foundation using the same according to the present invention, and FIG. 1 shows an embodiment of a folding PC foundation mold in a disassembled state. Sectional drawing, FIG. 2 is a plan view of the upper mold of the folding PC basic mold, FIG. 3 is a plan view of the lower mold of the bending PC basic mold, and FIG. 4 is a mounting state of the bending PC basic mold. FIG. 5 is a sectional view of the completed foundation, and FIG. 6 is a sectional view of FIG.
FIG. 7 is an enlarged sectional view of the middle A portion, and FIG. 7 is an enlarged sectional view of the B portion in FIG.

That is, the bent PC base formwork 1 of this embodiment.
0 is shown as an example when it is used when constructing the mechanical foundation 12 (see FIG. 5), and this folding PC foundation form 10 is formed by each folding PC plate as shown in FIG. 1. And an upper mold 10a and a lower mold 10b. As shown in FIG. 2, the upper frame 10a includes a rectangular bottom plate 14 having an opening 14a formed in the center thereof, and four side plates 16 standing upright from the periphery of the bottom plate 14. The side plate 16 can be bent with respect to the bottom plate 14 through a bending portion 18, and at the time of production in a factory or the like, the bottom plate 14 and the side plate 16 are formed flat as shown by the two-dot chain line in FIG. After that, the bent portion 18 is bent as shown by the solid line in the figure.

On the other hand, the lower frame 10b is formed in a rectangular shape along the periphery of the opening 14a as shown in FIG. As shown in FIG. 3, the lower formwork 10b has four corners 1
One becomes the joint portion 20, and the remaining corner portions become the bent portions 20a. When manufactured in a factory or the like, each bent portion 20a is flattened in the unfolded state and later bent into a rectangular tubular body.

The upper mold 10a and the lower mold 10b.
As shown in FIG. 4, the lower mold 10b is placed on the floor surface 22 and attached, and the upper mold 10a is fixed above the lower mold 10b. And
As shown in FIG. 6, the upper mold 10a and the lower mold 10b are coupled to each other via bolts 24. The lower formwork 10
The inside of the upper end of b is reinforced by the angle member 26. Further, when the lower formwork 10b is placed on the floor surface 22, a level adjusting bolt 23 is provided on the floor surface 22 as shown in FIG. 7, and the lower formwork 10b is placed on the level adjusting bolt 23. Is desirable.

When the lower mold 10b is placed on the floor surface 22, a mortar 28 is interposed between the two, and the mortar 28 fixes the lower mold 10b to the floor 22 and the lower mold 10b. The space between the floor and the floor 22 is sealed. In addition, the facing surfaces of the lower mold 10b of the bent PC basic mold 10 are connected by a separator 30, and a plurality of main bars 32 are provided from the floor surface 22 in the lower mold 10b via chemical anchors 34. Erected.

After the bent PC basic form 10 is attached to the floor surface 22, concrete 36 (see FIG. 5) is poured into the bent PC basic form 10. After the concrete 36 hardens, a waterproofing layer 38 of asphalt is applied from the outside of the lower mold 10b to the upper surface of the floor surface 22. Further, it is desirable to provide a draining plate 39 on the upper end of the waterproof layer 38 outside the lower mold 10b as shown in FIG.

In the method of constructing the foundation 12 using the folding PC foundation mold 10 of the present embodiment having the above construction, first, the folding PC foundation mold 10 is formed by the folding PC plate. It is composed of an upper mold 10a and a lower mold 10b. Therefore, by bending the upper mold 10a and the lower mold 10b from the bent portions 18 and 20a, respectively, it is possible to form the shape along the outside of the foundation 12 to be constructed, and to manufacture the mold. It will be easier. Since the mounting of the mold is completed by installing the upper mold 10a and the lower mold 10b on the floor surface 22, the work of mounting the mold is significantly simplified.

Further, since the bent PC basic form 10 is formed by the bent PC plate, the PC plate is integrated with the concrete 36 cast in the basic form 10. Therefore, it is not necessary to remove the formwork after the concrete 36 hardens, and the removal work can be eliminated.

Further, after the concrete 36 cast in the bent PC basic form 10 is hardened, a waterproof layer is provided between the outside of the bent PC basic form 10 and the upper surface of the floor 22. Since 38 was constructed, the formwork 10 and the floor surface 2
It is possible to reliably prevent rainwater and the like from entering from the joint portion with 2. Further, when the foundation 12 is waterproofed as described above, the waterproofing layer 38 is simply provided between the mold 10 and the floor surface 22, so that the waterproofing work can be remarkably easily performed.

FIGS. 8 to 10 show another embodiment, and the same components as those of the above embodiment are designated by the same reference numerals and the description thereof will be omitted. In this embodiment, concrete construction of the bent PC basic formwork 10 and the floor formwork is performed at the same time.

That is, in this embodiment, as shown in FIG. 8, a rectangular ring-shaped pedestal 42 formed of a PC plate via a spacer 40 is attached to a bottom surface 44 of a floor form 44 to which reinforcing bars (not shown) are installed.
A predetermined height (a concrete casting height of the floor slab) is lifted from a and fixed, and the lower formwork 10b of the bent PC base formwork 10 is installed on this pedestal 42. At this time, the asphalt 46 is formed on the periphery of the joint between the lower mold 10b and the pedestal 42.
Although not shown in the drawing, reinforcement is provided in the bent PC basic form 10 while not shown.

Next, as shown in FIG. 9, the floor form 44
At the same time as placing concrete 48 in the
Concrete 50 is placed in the C wall formwork 10. Then, after the concrete 48 and 50 are respectively hardened, a waterproof layer 38 of asphalt is applied from the outside of the lower formwork 10b to the upper surface of the floor surface 22 as shown in FIG.

Therefore, in this embodiment, the concrete 48 of the floor slab and the concrete 50 to be cast on the bent PC foundation mold 10 are simultaneously cast, and the respective concrete 48 and 50 of the mold 10 are cast. It can be integrated at the lower end. Therefore, the bonding strength between the foundation 12 and the floor surface 22 can be remarkably increased, and the foundation 12 can be constructed at the same time as the floor slab, so that the work steps for constructing the foundation 12 can be reduced. .

11 and 12 show another embodiment, in which the same components as those in the above-mentioned embodiment are designated by the same reference numerals and a duplicate description will be omitted. 11 is a plan view of the upper mold 10a, and FIG. 12 is a sectional plan view of the lower mold.

That is, in this embodiment, the upper mold 10a is
The lower mold 10b is divided into two parts, left and right, to form an upper mold 10a with upper left and right plates 10c and 10d, and a lower mold 10b with lower left and right plates 10e and 1e.
It is formed of 0f. The upper left and right plates 10c and 10d and the lower left and right plates 10e and 10f are respectively formed as bent PC plates.

The upper left and right slabs 10c and 10d are bent into a predetermined shape, and then joined together through an angle member 52 arranged inside the bent portions of the bottom slab 14 and the side slab 16, and The lower left and right plates 10e and 10f are also bent into a predetermined shape, and then joined together via a flat plate 54 arranged inside (or outside) the lower mold 10b. Further, the lower formwork 10b is the lower left and right plate 10
After connecting e and 10f, the separators 56 are arranged in a cross beam shape to fix the shape. A turnbuckle 58 is provided on the separator 56 so that the space between the facing surfaces of the lower mold 10b can be finely adjusted. Of course, it goes without saying that this embodiment also has the same functions as those of the above-mentioned embodiments.

In each of the above-described embodiments, the case where the folding PC basic mold 10 is formed by the upper mold 10a and the lower mold 10b is disclosed, but the invention is not limited to this, and the shape can be adjusted according to the desired shape of the installation. The shape can be changed appropriately,
For example, as shown in FIGS. 13 and 14, the bending PC basic form 60 can be formed only by a portion corresponding to the lower form. Even in the folding PC basic form 60, the left and right plates 10g and 10h are divided into two parts, left and right.
Are formed by bending PC plates.

By the way, in each of the above-mentioned embodiments, the PC foundation molds 10 and 60 for constructing the machine foundation are shown as an example, but the invention is not limited to this, and the cubicle pedestal foundation and the floor surface of the parapet, etc. are projected. It goes without saying that the present invention can be applied to the basis.

[0030]

As described above, according to the first aspect of the present invention.
In the folding PC foundation form shown in (1), bend from the folding portion of the folding PC plate so as to surround the outside of the foundation to be constructed, such as the cubicle platform foundation, parapet or machine foundation. Since it is configured, it is possible to easily form the form and facilitate the disposition of the form. Also,
By using this formwork as a PC plate, the concrete placed in the formwork and the bent PC base formwork can be integrated and the work of removing the formwork can be omitted, thus greatly simplifying the construction of the foundation. be able to.

A bending PC according to claim 2 of the present invention
In the method of constructing the foundation using the base formwork, the installation of the formwork can be completed simply by installing this folding PC base formwork on the floor surface, and the work of installing this formwork is extremely easy. Can be converted. Also, after the concrete placed in the formwork installed on the floor surface is hardened, a waterproof layer is applied across the outside of the bent PC base formwork and the top surface of the floor surface, making the waterproofing process simple. Can be done.

Further, the bending PC according to claim 3 of the present invention.
In the method of constructing the foundation using the foundation formwork, since the floor slab and the concrete of the foundation were placed at the same time, the concrete of the floor slab and the foundation were combined and integrated, and the strength of the foundation was strengthened. Can be significantly improved. Also, the foundation can be built at the same time as the floor formwork,
It has various excellent effects that the work steps for constructing the foundation can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view in an exploded state showing an embodiment of a bent PC basic formwork according to the present invention.

FIG. 2 is a plan view of an upper formwork showing an embodiment of a bent PC base formwork according to the present invention.

FIG. 3 is a plan view of a lower formwork showing an embodiment of a bent PC base formwork according to the present invention.

FIG. 4 is a sectional view of a bent PC basic formwork according to an embodiment of the present invention in a mounted state.

FIG. 5 is a cross-sectional view of a foundation constructed using the bent PC foundation formwork according to the present invention.

6 is an enlarged cross-sectional view of a portion A in FIG.

FIG. 7 is an enlarged cross-sectional view of a B part in FIG.

FIG. 8 is a cross-sectional view of a bent PC basic formwork according to another embodiment of the present invention in an attached state.

FIG. 9 is a cross-sectional view of a concrete placing condition showing another embodiment of the bent PC basic formwork according to the present invention.

FIG. 10 is a cross-sectional view of another embodiment of the folded PC base form according to the present invention in a waterproofed state.

FIG. 11 is a plan view of an upper formwork showing another embodiment of the folded PC base formwork according to the present invention.

FIG. 12 is a cross-sectional plan view of a lower formwork showing another embodiment of the folded PC base formwork according to the present invention.

FIG. 13 is a cross-sectional plan view showing another embodiment of the bent PC basic formwork according to the present invention.

FIG. 14 is a sectional side view showing another embodiment of the bent PC basic formwork according to the present invention.

FIG. 15 is a sectional view of an essential part showing a conventional foundation.

[Explanation of symbols]

10 PC Foundation Formwork 12 Foundation 18 Bent Section 20 Joined Section 20a Bent Section 22 Floor 36 Concrete 38 Waterproof Layer 40 Spacer 44 Floor Form 44a Bottom 48,50 Concrete 60 Bent PC Foundation Formwork

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ritsuo Matsumura 2-3 Chome, Kandajimachi, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Head Office

Claims (3)

[Claims] 1. A folding PC plate having a bent portion corresponding to a corner portion of a foundation shape to be constructed, such as a cubicle pedestal foundation, a parapet or a machine foundation, is provided, and the folded PC is bent from this bent portion. A folding PC foundation formwork, characterized by being constructed so as to surround the outside of the foundation to be constructed by folding the plate. 2. A folding PC foundation form surrounding the outside of a foundation to be constructed, such as a cubicle pedestal foundation, parapet or machine foundation, is provided, and after this folding PC foundation form is installed on the floor, It is characterized in that concrete is placed in the bent PC basic formwork, and after the concrete is hardened, a waterproof layer is applied across the outside of the bent PC basic formwork and the upper surface of the floor surface. Construction method of foundation using folding PC foundation form. 3. A bending PC foundation form surrounding the outside of a foundation to be constructed, such as a cubicle pedestal foundation, parapet or mechanical foundation, is provided, and this folding PC foundation form is used for floor formwork and floor reinforcement. After construction, with the predetermined height raised from the bottom of the floor formwork, place concrete into the floor formwork and place concrete inside the bent PC foundation formwork, and after these concrete sets, bend PC foundation A method of constructing a foundation using a bent PC foundation formwork, characterized by constructing a waterproof layer across the outside of the formwork and the top surface of the floor.