JPH0841908A - Forming method for concrete building frame of underground tank - Google Patents

Abstract

PURPOSE:To improve the strength of a form on the inner peripheral side of a form for directly locking an interval holding metal fittings by forming the form plate of FRP composite plate. CONSTITUTION:The inner peripheral side form plate 16 is formed by facing a rough face 10a where the one face of an FRP composite plate 10 is sided to expose the fiber material of FRP to its surface toward the side of an outer face for joining them in a face-shape, and unhardened FRP material 13 is laminated on the side of the rough face 10a of the joined spot 10b and tightly closed. An outer peripheral side form plate 17 is formed of steel plate or the like, and the outer peripheral side form plate 17 and the inner peripheral side form plate 16 are held by many space holding metal fittings at fixed intervals. In this case, the unhardened FRP material 14 is laminated on the outside of the form plate 16 being at a protruding spot for covering a through-hole section between the inner end of the space holding metal fittings 18 and the form plate 16. The unhardened concrete 19 is filled up between the form plates 16, 17, and after hardening, the form plate 17 is removed. The form plate can be directly locked on the space holding metal fittings 18 without reinforcing a longitudinal and a lateral frame for facilitating the assembling of the form.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a concrete skeleton of an underground tank, such as a basement or an underground water tank.

[0002]

2. Description of the Related Art There is a conventional technique shown in FIGS. In FIG. 6 and FIG. 7, A is a formwork, and is erected in a square or rectangular shape in plan view along the wall surface of a rectangular recess (not shown) in which the ground is excavated. The mold A has an inner peripheral mold plate 1 and an outer peripheral mold plate 2 with a predetermined gap. That is, the mold plates 1 and 2 formed by joining a large number of rectangular plate materials 1a and 2a made of a wooden plate or a metal plate in a planar shape are faced with a space 3 between them at a predetermined interval. , 2 are arranged on the outer surface side of the metal pipes in the form of a grid and vertical rods 5 and 5 are arranged in a grid pattern.
The pipe holder 6 fitted from the outer end side of the
Nut 7 that is locked to and is screwed to the outer end of the spacing member 3.
Thus, the pipe holder 6 is tightened, and the vertical rod 4 is pressed against the outer surfaces of the mold plates 1 and 2 through the horizontal rod 5 to reinforce the outer surface sides of the mold plates 1 and 2.

Next, uncured concrete 8 is filled between the mold plates 1 and 2 and is cured, and then the mold A
Then, the concrete skeleton having a square or rectangular shape in plan view is formed to form a concrete skeleton of a basement, and a waterproof plate (not shown) is fixed to the inner surface side of the concrete skeleton.

[0004]

In the above-mentioned conventional one, the outer surfaces of the mold plates 1 and 2 facing each other with a predetermined gap held between them are reinforced by a vertical rod 4 and a horizontal rod 5 made of a metal pipe, After the concrete skeleton is molded, the template 1 and 2 and the vertical rod 4 and the horizontal rod 5 are
Since it was designed to be removed from the concrete skeleton, there was a drawback that a great deal of labor was required to assemble and remove the form A. Furthermore, since the waterproof plate is attached to the inner surface side of the concrete skeleton after the concrete skeleton is molded, there is a drawback that the attachment is troublesome. An object of the present invention is to obtain a new method for forming a concrete skeleton for an underground tank, which solves the above-mentioned drawbacks.

[0005]

The present invention is configured as follows to achieve the above object. That is, both sides of a plate-shaped core material are covered with FRP material to provide a rectangular FRP composite plate having a predetermined area, and one surface of the FRP composite plate is sanded to expose the FRP fiber material to the surface. Formed on a surface, the FRP composite plates are joined together in a plane to form one template, and the other template is faced to the opposite rough surface side of the one template, and both templates are held at a distance. Hold at a predetermined interval with metal fittings, uncured FRP material is laminated on the rough surface side of the one template to cover the seam of each FRP composite plate and the outer peripheral surface of the interval maintaining metal fitting, and then between each template. It is configured to be filled with uncured concrete.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, FIG. 1 shows an FRP showing an embodiment of the present invention.
FIG. 2 is a sectional view of the composite plate, FIG. 2 is an enlarged sectional view of the FRP composite plate in which a rough surface is formed, FIG. 3 is a partial front view of a formwork showing an embodiment of the present invention, and FIG. 4 is VI-VI of FIG. FIG. 5 is a substantial enlarged cross-sectional view, and FIG. 5 is a cross-sectional view of a main part of an underground tank concrete skeleton formed by the present invention.

In FIGS. 1 and 2, reference numeral 10 denotes an FRP composite plate, and FRP (fiber reinforced plastic) is provided on both upper and lower sides of a core material 11 formed of a foamed plastic plate in a rectangular shape.
The material 12 is laminated, and one surface of the FRP composite plate 10 is sanded to form a rough surface 10a on which the FRP fiber material (not shown) is exposed.

In FIGS. 3 and 4, reference numeral 15 is a formwork, which is erected in a square or rectangular shape in plan view along the wall surface of the rectangular recess 22 (FIG. 5) excavated in the ground. The mold 15 is formed by holding a predetermined gap between an inner peripheral mold plate 16 and an outer peripheral mold plate 17. That is, the template 16 on the inner peripheral side
Is a planar joint of the above-mentioned FRP composite plate 10 with its rough surface 10a facing the outer surface side (right side in FIG. 4),
The uncured FRP material 13 is laminated on the rough surface 10a side of the joint 10b of each FRP composite plate 10 to seal the joint 10b.

Further, the template 17 on the outer peripheral side is formed of a steel plate or a pile made of steel plates for preventing the collapse of the soil wall of the recess 22 (FIG. 5), and the template 17 on the outer peripheral side and the inner peripheral side The mold plate 16 and the mold plate 16 are held at predetermined intervals by a large number of interval holding metal fittings (separators) 18. Each spacing holder 18
Is fixed to both ends of the rod 18a with a large-diameter pad plate 18b that abuts the facing sides of the mold plates 16 and 17,
A large diameter pad 18c that abuts on the opposite side (outer surface) of each of the template plates 16 and 17 is fitted to both ends of the pad 1.
The mold plates 16 and 17 are held at predetermined intervals by tightening 8c with a nut 18d.

The outer surface of the template 16 at the portion where the right end (inner end) of the spacing member 18 projects, that is, the FRP composite plate 10
The uncured FRP material 14 is laminated on the rough surface 10a of
The RP material 14 covers the inner end portion of the spacing member 18 and the through hole portion of the template 16. Then, as shown in FIG. 4, the uncured concrete 19 is interposed between the template plates 16 and 17.
After curing, the template 17 on the outer peripheral side is removed to form a concrete skeleton 20 having a square or rectangular shape in plan view as shown in FIG. 5, for example, a concrete skeleton of a basement.

In this case, the template 16 on the inner peripheral portion is left as it is, and a waterproof plate for preventing water and water drops from leaking from the inner surface of the concrete skeleton 20 is used. Here, in the case where the template 17 on the outer peripheral side is a pile made of steel plates that prevents the soil wall of the recess 22 from collapsing, the template 17 is left as it is without being removed. In FIG. 5, 21 is a concrete base formed on the bottom surface of 22. The base 21 may be formed in the same manner as the concrete skeleton 20 described above, and the template 16 may be fixed to the upper surface thereof.

According to the above-described embodiment, since the mold plate 16 on the inner peripheral side of the mold frame 15 is formed of the FRP composite plate 10, the strength is increased, and it is not reinforced by the vertical rod and the horizontal rod as in the conventional case. Since it can be directly engaged with the spacing member 18, the formwork can be assembled quickly and easily. Moreover, since the template 16 on the inner peripheral side fixed to the inner peripheral surface of the concrete skeleton 20 has a waterproof function, a heat insulating function and a sound insulating function, it is necessary to attach a new waterproof plate or heat insulating plate after the concrete skeleton 20 is molded. It will be eliminated and the man-hour will be reduced.
In the present invention, the mold plate 16 may be arranged on the outer peripheral side of the mold plate 17 to cover the outer peripheral surface side of the molded concrete skeleton 20.

[0013]

As is apparent from the above description, according to the present invention, the concrete skeleton of the underground tank having the waterproof function, the heat insulating function, and the sound insulating function can be quickly and inexpensively molded. In addition, the surface of the FRP composite plate is sanded to form a rough surface where the FRP fiber material is exposed on the surface, and the uncured FRP material is laminated on the rough surface to join the joints and the spacing metal fittings of each FRP composite plate. Since the outer peripheral surface of the FRP composite sheet is covered, the uncured FRP material is firmly fixed to the rough surface of the FRP composite plate, and the waterproof function of the concrete skeleton can be kept high for a long period of time. Produce the effect of.

[Brief description of drawings]

FIG. 1 is a sectional view of an FRP composite plate showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing a state in which a rough surface is formed on an FRP composite plate.

FIG. 3 is a partial front view of a formwork showing an embodiment of the present invention.

4 is an enlarged cross-sectional view corresponding to VI-VI in FIG.

FIG. 5 is a cross-sectional view of an essential part of an underground tank concrete skeleton molded according to the present invention.

FIG. 6 is a side view showing a conventional example.

FIG. 7 is a sectional view taken along line VII-VII of FIG.

[Explanation of symbols]

 10 FRP composite plate 10a Rough surface 10b Seam 11 Core material 12 FRP 13 Unhardened FRP material 14 Unhardened FRP material 15 Form frame 16 Inner peripheral side template 17 Outer peripheral side template 18 Spacing tool 18a Patch plate 18b Batting seat 18c Nut 19 Unhardened concrete 20 Concrete skeleton 22 Recess

Claims (1)

[Claims] 1. A rectangular FRP composite plate having a predetermined area is provided by coating both sides of a plate-shaped core material with an FRP material.
One surface of the RP composite plate is sanded to form a rough surface where the FRP fiber material is exposed on the surface, and the FRP composite plates are joined in a plane to form one template, and the other template is formed. While facing the anti-rough surface side of the one template, both template plates are held at a predetermined interval by a spacing metal fitting, and an uncured FRP material is laminated on the rough surface side of the one template plate. FRP
Covers the seams of the composite plate and the outer peripheral surface of the spacing metal fittings,
Next, a method for forming a concrete skeleton for an underground tank, characterized in that uncured concrete is filled between each template.