JPH06200532A - Pc foundation form and foundation construction method using it - Google Patents

Abstract

PURPOSE:To simplify the construction work for foundation using PC foundation forms, and also shorten the work period. CONSTITUTION:The outer side of a foundation to be constructed is surrounded by PC boards 14. Also separators 16 for holding the opposed PC boards 14 at specified intervals are connected to the upper and lower ends of the PC boards 14. Engaging parts 18 for locking fixing metals 36 are formed inside the lower end of the PC boards 14. Multiple angle pieces 32 are provided on a floor surface 30 in which a foundation is constructed along the lower end form of the foundation, and level adjustment bolts 34 are positioned at the outer side of the angle pieces 32. Then the engaging parts 18 for PC foundation forms 10 are locked at the outside of the angle pieces 32, and the lower end of the PC boards 14 is located on the level adjustment bolts 34.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PC base formwork for constructing a cubicle pedestal foundation, parapets 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. Regarding

[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. 12 shows an example of a conventional parapet 1, which is provided in an inverted L-shape so as to project on the peripheral edge of the rooftop floor surface. 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 rebar 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. There is. 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.

In view of the above conventional problems, the present invention provides a PC foundation form which can simplify the construction work of the foundation and shorten the construction period, and a construction method using the same. With the goal.

[0006]

In order to achieve the above object, the PC foundation form of the present invention comprises a PC plate surrounding the outside of the foundation to be constructed, and a separator is provided at least between the upper ends of the PC plate. And the lower end portion of the PC plate is provided with an engaging portion that engages with a fixing fitting provided on the floor surface.

Further, in such a structure, it is desirable to integrally incorporate a reinforcing bar in advance inside the PC plate surrounding the outside of the foundation.

Further, it is desirable to provide a turnbuckle in the middle portion of the separator.

In order to achieve such an object, the construction method using the PC foundation form of the present invention is such that the outside of the foundation to be constructed is surrounded by the PC plate and at least the upper end portion of this PC plate is surrounded. While installing the PC basic formwork that is connected by the separator, install a plurality of fixing brackets on the floor surface, lock the lower end of the PC basic formwork to these fixing brackets, and install the concrete inside the PC basic formwork. And the method of placing.

[0010]

With the above construction, in the PC base formwork and the construction method using the same of the present invention, the PC base formwork is
At least the upper ends of the C plate are connected by a separator, and the lower end of the PC basic form is provided with an engaging portion, so that the engaging portion is simply locked to a fixing metal fitting on the floor surface. , The formwork can be easily attached. In addition, since the PC base form is formed of the PC plate, the concrete placed inside the PC form and the PC base form are integrated, so that there is no need to remove the form after the concrete has hardened. can do. Therefore, the foundation projecting from the floor surface can be constructed by a remarkably simple work of installing the PC foundation form and placing concrete, and the construction period can be shortened.

Further, in such a structure, the reinforcing bars are integrally incorporated in advance inside the PC plate surrounding the outside of the foundation, whereby the reinforcing work after mounting the formwork is omitted and the construction period is further shortened. be able to.

Further, by providing a turnbuckle in the middle part of the separator, the interval between the PC plates fixed by the separator can be adjusted, and the consistency of the mold can be easily improved.

[0013]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. 1 to 6 show an embodiment of a method of constructing a foundation using a PC foundation form according to the present invention, and FIG.
Is a cross-sectional view showing an embodiment of a PC base formwork, FIG. 2 is a cross-sectional view of a floor surface for constructing a foundation, FIG. 3 is a cross-sectional view showing a state in which a PC base formwork is installed on the floor surface, and FIG. 4 is a floor. FIG. 5 is a sectional view showing a finished state of the lower end portion of the PC foundation mold installed on the surface, FIG. 5 is a sectional view of the completed foundation, and FIG. 6 is a sectional plan view taken along the line AA in FIG.

That is, the PC foundation mold 10 used in this embodiment is used when constructing a cubicle platform foundation such as a power board or a drive board, and the foundation 12 to be constructed as shown in FIG. 1 (see FIG. PC version 1 that surrounds the outside (see 5)
4, the separator 16 for holding the facing PC plate 14 at a predetermined interval is connected to the upper end and the lower end of the PC plate 14. As shown in FIG. 6, the PC plate 14 is formed by bending the PC plate 14 into first and second PC plates 14.
The ends of a and 14b are joined together to form a rectangular shape. Further, the inside of the lower end of the PC plate 14 is configured as an engaging portion 18 that is locked to a fixing fitting 36 described later.

A PC plate 1 facing the PC base mold 10
On the inner side of 4, a rebar cage 24 composed of a main rebar 20 arranged in the longitudinal direction and an auxiliary rebar 22 surrounding the main rebar 20.
Is fixed to the separator 16 and is integrally attached. A turnbuckle 26 is provided in the middle of the separator 16 so that the distance L between the PC plates 14 facing each other by the turnbuckle 26 can be finely adjusted. In addition, inside the upper end of the PC plate 14,
After the concrete 44, which will be described later, is poured, the joint 28 is driven. By the way, the PC base formwork 10 is manufactured in a factory or the like, and is carried into the site where the base 12 is to be constructed.

On the other hand, the floor surface 30 on which the foundation 12 is constructed
2, a plurality of angle pieces 32 are provided along the lower end shape of the foundation 12 to be constructed as shown in FIG. One side 32a of the angle piece 32 is oriented on the inside of the PC basic formwork 10 to be installed on the floor surface 30, and is fixed to the floor surface 30 via a bolt (not shown). The side 32b is arranged at a right angle from the floor surface 30 so as to face the outside of the PC basic formwork 10.

A level adjusting bolt 34 is provided outside the angle piece 32. In the present embodiment, the angle piece 32 and the level adjusting bolt 34 are provided.
The fixing metal fitting 36 is constituted by. The level adjusting bolt 34 is provided at a position distant from the other side 32b of the angle piece 32 in the outward direction by a thickness corresponding to approximately half the thickness of the PC plate 14, and is screwed onto the floor surface 30 so as to be retractable. Further, on the floor surface 30 surrounded by the fixing metal fittings 36, a plurality of main bars 38 are erected via chemical anchors 40.

Next, as shown in FIG. 3, the engaging portion 18 formed at the lower end of the PC base form 10 is locked to the outside of the other side 32b of the angle piece 32 of the fixing metal fitting 36. And the lower end of the PC plate 14 is placed on the level adjusting bolt 34. Then, by rotating the level adjusting bolt 34 to adjust the height, the PC basic form 10 is set in a horizontal state. Further, the main reinforcing bar 20 of the reinforcing bar cage 24 incorporated in the PC basic form 10 and the main reinforcing bar 38 erected from the floor surface 30 form a lap joint.

In this way, the PC base formwork 1 is attached to the fixing bracket 36.
By setting 0, a gap δ is formed at the lower end of the PC plate 14 with the floor surface 30 by the level adjusting bolt 34. For this reason, as shown in FIG. 4, the mortar 42 is filled in the gap δ portion to make the seal. Then, by pouring concrete 44 (see FIG. 5) inside the PC foundation form 10, the foundation 12 shown in FIG. 5 can be constructed.

As described above, the PC base formwork 10 of this embodiment is used.
In the construction method of the foundation 12 using, the PC foundation formwork 10
The PC plate 14 surrounded along the outside of the foundation 12 to be constructed, the separator 16 provided between the facing PC plates 14, and the engaging portion 1 provided at the lower end of the PC plate 14.
Since it is composed of 8 and 8, the PC base formwork 10 is preliminarily formed in a factory or the like and carried into the site, and the PC base formwork 1
By simply setting the 0 to the fixing metal fittings 36 provided on the floor surface 30 of the building for installation, the formwork of the foundation 12 can be easily attached. In addition, basic 12
Since the formwork of No. 1 was configured as the PC base formwork 10,
Since the concrete 44 cast in the C foundation mold 10 and the PC plate 14 are integrated, the work of removing the mold is unnecessary. As described above, in the present embodiment, the use of the PC base mold 10 makes it easy to mount the mold, and
Since it is not necessary to remove the formwork after placing the concrete 44, the work for constructing the foundation 12 is significantly simplified, and the construction period and the construction cost can be shortened.

The PC plate 14 of the PC basic form 10
Since the reinforcing bar cage 24 composed of the main reinforcing bar 20 and the auxiliary reinforcing bar 22 is integrally integrated in advance inside, the reinforcing bar work after mounting the formwork can be omitted, and the construction period can be further shortened.

Further, since the turnbuckle 26 is provided in the middle portion of the separator 16 for connecting the facing PC plates 14 of the PC base form 10, the space between the PC plates 14 is adjusted by adjusting the turnbuckle 26. Fine adjustment of L is possible, and the consistency of the mold can be simplified and further enhanced.

In this embodiment, the separator 16 is a PC
Although the case where it is provided between the upper and lower ends of the plate 14 has been described, the separator 16 may be provided at least between the upper ends of the PC plate 14.

7 and 8 show another embodiment, in which the same components as those of the above-mentioned embodiment are designated by the same reference numerals, and a duplicate description will be omitted. In addition, FIG. 7 shows the PC basic form 10a on the floor 3
0 is a sectional front view in the state of being installed at 0, and FIG. 8 is a sectional side view in the same state.

That is, in this embodiment, the fixing metal fitting 36 is constituted by only the angle piece 32, and the P of the PC base form 10a is formed.
The lower end of the C plate 14 is directly placed on the floor surface 30. That is, in this embodiment, the level adjustment bolt used in the above-described embodiments can be eliminated by forming the floor 30 with high horizontal accuracy in advance. Therefore, in this embodiment, it is necessary to increase the horizontal accuracy of the floor surface 30, but the level adjustment bolt is eliminated and the fixing metal fitting 36 is removed.
The structure of can be simplified. In this embodiment, as shown in FIG. 7, the PC plate 14 facing in the lateral direction is used.
The insides of the upper ends of a and 14b are chamfered.

FIG. 9 shows another embodiment, in which the same components as those in the above embodiment are designated by the same reference numerals, and a duplicate description will be omitted. 9 is a sectional plan view corresponding to FIG.

That is, in this embodiment, the PC plate 14 of the PC base form 10b is bent into a U-shape to form the third and fourth P plates.
The C plates 14c and 14d are arranged in a rectangular shape by joining the ends thereof to each other. Even in this embodiment, as shown in FIG.
2 only, the PC base formwork 10 directly on the floor 30
Alternatively, as shown in FIG. 11, the fixing metal fitting 36 may be composed of the angle piece 32 and the level adjusting bolt 34, and the height of the PC plate 14 may be finely adjusted.

By the way, in each of the above-mentioned embodiments, the PC base formwork 10 for constructing the cubicle pedestal base has been shown as an example, but the present invention is not limited to this, and the foundation protruding from the floor surface of the equipment machine foundation and parapets. It goes without saying that the present invention can be applied to.

[0029]

As described above, according to the first aspect of the present invention.
In the PC base formwork shown in Fig. 2, at least the upper end portions of the PC plate are joined with a separator, and the lower end part of the PC base formwork is provided with an engaging portion to be engaged with a fixing fitting provided on the floor surface. Since it is constructed and installed, this PC basic formwork is manufactured at a factory etc. and brought to the site, and the engaging part of this PC basic formwork is simply locked to the fixing metal fittings on the floor surface to mount the formwork. Can be done easily. In addition, the PC basic form is P
Since it is formed by the C plate, the concrete cast inside it and the PC base form can be integrated, and it is not necessary to remove the form after the concrete has hardened. Therefore, the work for constructing the foundation can be simplified and remarkably simplified, and the work period can be shortened.

Further, according to the second aspect of the present invention, since the reinforcing bars are integrally incorporated inside the PC plate surrounding the outside of the foundation, the reinforcing work after mounting the formwork is omitted. The construction period can be further shortened.

Further, according to the third aspect of the present invention, since the turnbuckle is provided in the intermediate portion of the separator, the interval between the PC plates fixed by this separator can be adjusted, and the consistency of the form can be maintained. It can be easily increased.

Further, according to claim 4 of the present invention,
A plurality of fixtures are provided on the floor surface, the lower end of the PC base formwork is locked and installed on these fixtures, and the foundation is constructed by placing concrete inside the PC base formwork. Therefore, it is possible to easily attach the base formwork, simplify the construction procedure, and shorten the construction period.

[Brief description of drawings]

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

FIG. 2 is a cross-sectional view of a floor for constructing a foundation showing an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a state where a PC base formwork is installed on a floor surface showing an embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a finished state of a lower end portion of a PC foundation mold installed on a floor surface showing an embodiment of the present invention.

FIG. 5 is a sectional view of a completed foundation showing an embodiment of the present invention.

6 is a cross-sectional plan view taken along the line AA in FIG.

FIG. 7 is a sectional front view showing a state in which a PC basic formwork according to another embodiment of the present invention is installed on the floor surface.

FIG. 8 is a cross-sectional side view showing a state where a PC base formwork according to another embodiment of the present invention is installed on the floor surface.

FIG. 9 is a cross-sectional plan view of a PC base form showing another embodiment of the present invention.

FIG. 10 is a sectional front view of a PC base form showing another embodiment of the present invention.

FIG. 11 is a sectional front view of a PC base form showing another embodiment of the present invention.

FIG. 12 is a sectional view of an essential part showing a conventional foundation.

[Explanation of symbols]

10 PC foundation formwork 12 Foundation 14 PC version 16 Separator 18 Separator 24 Reinforcing bar basket 26 Turnbuckle 30 Floor surface 32 Angle piece 34 Level adjusting bolt 36 Fixing bracket 44 Concrete

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

Claims (4)

[Claims] 1. A fixing plate provided with a PC plate surrounding an outer side of a foundation to be constructed, at least upper end portions of the PC plate being connected by a separator, and a fixing plate provided on a floor surface at a lower end portion of the PC plate. A PC basic formwork, characterized in that an engaging portion for engaging with is provided. 2. Inside the PC plate surrounding the outside of the foundation,
The PC base formwork according to claim 1, wherein reinforcing bars are integrally incorporated in advance. 3. The PC base formwork according to claim 1, wherein a turnbuckle is provided in an intermediate portion of the separator. 4. A PC base formwork in which the outside of the foundation to be constructed is surrounded by a PC plate and at least upper end portions of the PC plate are connected with a separator, while a plurality of fixing brackets are provided on the floor surface. A method of constructing a foundation, characterized in that the lower end of a PC base formwork is locked to these fixing fittings and installed, and concrete is placed inside the PC base formwork.