JP2001317070A - Permanent form framing method for cellular concrete - Google Patents

Abstract

PROBLEM TO BE SOLVED: To positively carry out framing of a permanent form in construction of a cellular concrete structure. SOLUTION: A number of main columns are vertically fixed beforehand to foundation concrete arranged at a lower end in a region where cellular concrete is placed, and then panel-type permanent forms are connected together so as to be stacked to a constant height. Next, the permanent form and the main column are rigidly connected together by a front support, then a buried resisting member is mounted on one side of the main column opposite to the permanent form, and the buried resisting member and the main column are connected together by a rear support, to thereby frame the permanent form. Thereafter, the framing is successively carried out to a predetermined height while the cellular concrete is placed to the constant height.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of forming a remaining formwork for a structure for casting cellular concrete.

[0002]

2. Description of the Related Art Conventionally, when constructing a concrete structure, the remaining formwork of a concrete panel is used as a formwork, and after the cast concrete is solidified, the formwork is placed on the surface of the concrete structure. There is a known construction method that does not require removing the formwork. In recent years, this method has attracted attention because of its ease of construction, low labor cost, and no waste material.

[0003] In this residual formwork method, as shown in Fig. 8, a method of framing the residual formwork (2) is sequentially upward in accordance with the concrete placement height to be divided into several parts. The reinforced concrete pile (11) is inserted into the foundation concrete (1) and fixed in advance, and then a plurality of residual molds are placed on the foundation concrete (1) according to the height of the concrete (A). The frames (2) are stacked, connected and fixed with the connecting metal fittings (3), and at least the frame between the reinforcing pile (11) and the connecting metal (3) is supported by the columns (12), and the first concrete ( A) While casting, and while it does not solidify, reinforced pile (11)
Insert and put. After the cast concrete (A) is solidified, the same framework as described above is used, a second concrete (A) is cast, and thereafter, the same framework and concrete (A) are repeatedly cast, and the height of the structure is increased. It was a way to frame until it was.

[0004]

According to the above-mentioned conventional framing method, the concrete to be cast is a paste-like mixture of Portland cement mixed with sand, gravel or the like as an aggregate, and has a high specific gravity and is hard. Since this method is for general solidified concrete (A), reinforced piles (11)
Is firmly fixed to the solidified concrete (A), so that it does not come off or incline, and the conventional frame method can sufficiently cope with the lateral pressure during concrete placement. However, when the cast concrete (A) is cellular concrete, the specific gravity is light and hard and does not solidify. Therefore, in the conventional reinforced pile (11), due to the lateral pressure of the cast concrete (A) applied to the remaining stacked formwork. There has been a problem that the reinforced pile (11) comes off or tilts and moves, and there is a danger that the remaining formwork will shift or collapse.

The present invention solves the above-mentioned conventional problems. In the construction of a cellular concrete structure, even if the poured concrete is soft or soft after solidification, the framework of the remaining form can be reliably formed. An object of the present invention is to provide a method of framing a remaining formwork that can sufficiently withstand the lateral pressure of cast concrete.

[0006] Another object of the present invention is to provide a method of assembling a residual formwork which is durable and does not generate rust on members and the like supported by the residual formwork buried in cast concrete. .

[0007]

According to the present invention, a number of main columns (4) are preliminarily suspended in a cellular concrete (A) and placed on a foundation concrete (1) at a lower end. Then, the panel-shaped remaining form (2) is stacked at a certain height and connected, and a front support (5) is provided between the remaining form (2) and the main column (4). A buried resistance member (6) is placed on the opposite side of the main pillar (4) from the remaining formwork (2) with respect to the main pillar (4).
And the main column (4) are connected by a rear column (7) to form a frame of the remaining formwork (2). Thereafter, the frame is sequentially cast with the cellular concrete (A) at a constant height. While performing to a predetermined height.

Preferably, the main column (4) is connected upward by a connecting member (9) and extended.

Two sockets (8) are fixed to the connecting member (9) at an angle, and one of the sockets (8) is fixed.
It is preferable that one end of the front support (5) is inserted into a book, and one end of the rear support (7) is inserted into another book and fixed with a fixing screw (8a).

The main column (4), the front column (5), the buried resistance member (6), and the rear column (7) are coated with an epoxy resin paint and connected at the time of framing except for welding. It is preferable to use a joining method.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view showing a framing method of the present invention, FIG. 2 is a front view showing a framing method of the present invention, and FIG. 4 is a perspective view of the connecting member attached to the main pillar of the present invention, in which a socket is provided, FIG.
FIG. 6 is a cross-sectional view of the connecting member attached to the main pillar of the present invention, FIG. 6 is a front view of the buried resistance member of the present invention, FIG. 7 is a cross-sectional view of the buried resistance member of the present invention, and FIG. FIG.

First, a framework method for casting the cellular concrete (A) of the present invention will be described with reference to FIGS.
(1) is a foundation concrete, which is provided at a lower end portion of a structure to be usually constructed and serves as a foundation of the structure.
(2) is a panel-shaped residual formwork made of concrete,
For example, a material having a thickness of about 30 to 40 mm, a width of about 900 to 1200 mm, and a height of about 600 mm is used. The remaining formwork (2) is laid on the foundation concrete (1) and connected to each other by the connecting metal fittings (3). Are stacked one after another according to the height of the cellular concrete (A) to be cast. To explain this further, the residual formwork used in the present invention is of a type that, when a concrete structure is constructed, forms itself as a formwork and remains on the surface of the concrete after the concrete is poured. One example is the one proposed by the present inventor in Japanese Patent Application No. 9-237667 or Japanese Patent Application No. 10-71408. In this example, only a typical one is illustrated. However, the present invention is not limited to this example. The connecting bracket (3) is disclosed in Japanese Patent Application No. 9-2781 proposed by the present inventors.
No. 83 is preferably used, but is not limited thereto.

Next, as a procedure for framing the remaining formwork (2), unless the height of the structure is extremely low, the framing is not completed by stacking all at once from the beginning to the height of the structure. That is, when the structure has a certain height, for example, a height at which three or more remaining forms (2) are stacked, the cellular concrete (A) is not poured at once and the cellular concrete (A) is used. It is preferable from the viewpoint of danger that the casting height of (a) is within 600 mm to 1200 mm. Therefore, the cellular concrete (A) is cast in several times. In this way, the remaining formwork (2) is piled up according to the height of the cellular concrete (A) to be cast at one time, that is, the piled-up height, and the process is repeated sequentially to pile up to the height of the structure. You do it.

(4) is a main pillar whose lower end is buried in the foundation concrete (1) in advance and fixed vertically, and the main pillar (4) is made of an iron pipe, a reinforcing bar, a shape steel or the like. And this main pillar (4) is slightly shorter than the height of the structure,
They are buried in cast concrete. A large number of the main pillars (4) are arranged in parallel with the remaining formwork (2) in the casting of the cellular concrete (A).

(5) a front strut for connecting the remaining formwork (2) and the main column (4) to support and fix the remaining formwork (2) to the main column (4). Although a rod is used, an iron pipe, flat steel, an iron rod, or the like may be used.

Reference numeral (6) denotes a buried resistance member mounted on the opposite side of the remaining formwork (2) with respect to the main pillar (4). The buried resistance member (6) has a shape having a predetermined tensile resistance when buried in the cellular concrete (A) to be poured, and may have a shape having a certain area in the tensile direction.
For example, what is shown in FIGS. 6 and 7 is a plate-like member, and a plate member (6a) is provided with a connecting pipe (6b) and a fixing screw (6c). In addition, an angle, a shape steel, or the like may be used. The buried resistance member (6) is initially placed on the foundation concrete (1) or on the ground outside the foundation concrete (1).
After placing the cellular concrete (A) for the first time, it is placed on the cellular concrete (A) that has been placed thereafter.

(7) Main pillar (4) and buried resistance member (6)
A rear support connecting between the front support and the front support (5).
It is basically the same even if the length and the supporting angle are slightly different.

The method of framing the remaining formwork of the present invention is to form a frame using the above-described method, and the procedure of this framing will be described below. First, several pieces of the remaining formwork (2) are stacked on the foundation concrete (1) and connected by the connection fitting (3).
Next, the stacked form of the remaining formwork (2) and the main column (4) are connected by the front support (5), and the remaining formwork (2) is supported and fixed by the main column (4). At this time, one end of the front support (5) is connected to the socket (3a) screwed to the connection fitting (3) and fixed with the fixing screw (3b) (see FIG. 3), and the other end is connected to the main support (4). Insert it into the attached socket (8) and fix it with the fixing screw (8a) (see FIG. 4). The height of the socket (8) is provided at a position lower than the height of the connection fitting (3), and is buried when the cellular concrete (A) is cast. Then, the buried resistance member (6) is placed on the ground on the rear side opposite to the remaining formwork (2) with respect to the main pillar (4), and the buried resistance member (6) and the main pillar (4) are connected to each other. The spaces are connected by the rear support (7) to form a framework of the remaining formwork (2). In this framed state, the first cellular concrete (A) is cast. And one
After the aerated concrete (A) has been solidified the second time,
The frame for placing the cellular concrete (A) after the second time may be sequentially moved up to the height of the structure using the same frame as the first time. At this time, the buried resistance member (6) is placed on the solidified cellular concrete (A).

The main column (4) has a fixed length with a connecting member (9) fixed to one end, and is extended to a predetermined length while the other end is connected upward by a connecting member (9). It is preferable in terms of. This connecting member (9) is provided with a fixing screw (9b) on a short tube (9a) as shown in FIG.
The main column (4) inserted from above the short pipe (9a) is fixed by fixing screws (9b).

Further, as shown in FIG. 4, the connecting member (9)
Two sockets (8) are provided at an angle to each other, and one end of the front support (5) is inserted into one of the sockets (8) and one end of the rear support (7) is inserted into the other socket. Fixing with (8a) makes the work easier and the framework easier. The mounting angle of the socket (8) is adjusted to the angle at which the front support (5) and the rear support (7) are connected.

In the present invention, the main column (4), the front column (5), the buried resistance member (6), and the rear column (7) are coated with epoxy resin paint, but are buried in concrete. Are also rust resistant and preferred. Then, in the case of the framework, it is preferable that the connection is performed by a connection method other than welding in order to prevent rust, and for example, the connection may be made by a socket and a screw. Incidentally, (10) is a horizontal rod for reinforcement.

[0022]

According to the present invention, the main pillar (4) suspended from the lower end of the foundation concrete (1) is connected to the remaining formwork (2) by the front support (5), and the main pillar (5) is connected. (4) is connected to the buried resistance member (6) by the rear support (7), and the stacked form (2) is connected to the main pillar (4) and the buried resistance member (6).
The feature is that it is supported by By taking advantage of this feature, conventionally, the framework of the remaining formwork (2) for casting the cellular concrete (A) supports the remaining formwork (2) that is stacked with the softness of the cellular concrete (A). It was difficult to do, but the main pillar (4) suspended from the foundation concrete (1)
And the buried resistance member (6), which exhibits a high tensile resistance when buried in the cellular concrete (A), allows the remaining formwork (2) to be firmly formed even when the cellular concrete (A) is cast. Especially for tall structures, such as retaining walls,
Even when the cellular concrete (A) is cast several times, the frame can be reliably formed.

Further, since the main pillar (4) can be extended upward by connection, several pieces of a fixed length can be prepared from the foam concrete (A) without preparing a piece from the beginning up to the height of the structure.
It is only necessary to add the number of times according to the number of times of installation, and it is convenient to carry in to the construction site, and it is possible to cope with structures of various heights.

Further, according to the present invention, the main column (4), the front column (5), the buried resistance member (6) and the rear column (7) are coated with an epoxy resin paint, and their connecting portions are formed by welding. Since the connection method is used, there is almost no rust even when buried in the cellular concrete (A). Therefore, cellular concrete (A) has good permeability of rainwater and rust is easily generated inside, and the rust flows out to the surface of the remaining formwork (2) to make the appearance of the structure seem bad, and sometimes, Although the remaining form (2) may fall, such a problem is prevented in the present invention, and a structure with good appearance can be maintained for many years.

[Brief description of the drawings]

FIG. 1 is a side view showing a framing method of the present invention.

FIG. 2 is a front view showing the framing method of the present invention.

FIG. 3 is an explanatory view of a connection state of the remaining formwork of the present invention.

FIG. 4 is a perspective view in which a socket is provided on a connecting member attached to the main pillar of the present invention.

FIG. 5 is a sectional view of a connecting member attached to a main pillar of the present invention.

FIG. 6 is a front view of the buried resistance member of the present invention.

FIG. 7 is a sectional view of an embedded resistance member according to the present invention.

FIG. 8 is an explanatory diagram of a conventional framing method.

[Explanation of symbols]

 A Aerated concrete 1 Basic concrete 2 Remaining formwork 3 Connecting bracket 4 Main column 5 Front column 6 Buried resistance member 7 Rear column 8 Socket 8a Fixing screw 9 Connecting member

Claims (4)

[Claims] A large number of main pillars (4) are previously placed in a cellular concrete (A) and a foundation concrete (1) at a lower end thereof.
Then, the panel-shaped remaining formwork (2) is stacked at a certain height and connected with a connection fitting (3), and the remaining formwork (2) and the main column (4) are connected. And a buried resistance member (6) is placed on the opposite side of the remaining formwork (2) with respect to the main pillar (4) with a front support (5). A member (6) and the main column (4) are connected by a rear column (7) to form a frame of the remaining formwork (2);
Thereafter, the method of forming a residual formwork for cellular concrete is characterized in that the frame is successively formed to a predetermined height while the cellular concrete (A) is cast at a constant height. 2. The connecting member (9) with the main column (4) upward.
2. The method for framing a residual formwork for cellular concrete according to claim 1, wherein the form is connected and extended. 3. The connecting member (9) is provided with two sockets (8) at an angle, one of the sockets (8) being the front strut (5) and the other being the rear strut. 2. The method according to claim 1, wherein one end of each of the columns (7) is inserted and fixed with a fixing screw (8a). 4. The main column (4), the front column (5), the buried resistance member (6) and the rear column (7) are coated with an epoxy resin paint and welded at a connection point in a frame. 2. The method for forming a residual formwork for cellular concrete according to claim 1, wherein the method is performed by a connection method other than the above.