JPH0842032A - Fixing method of pc form - Google Patents

Abstract

PURPOSE:To prevent the generation of rust in the ends of a fixing member for a PC form when fixing a pair of PC forms with a separator, for example, with a specified spacing and placing concrete in the spacing, thereby executing a concrete wall and to prevent the generation of uneven areas on the concrete wall. CONSTITUTION:A connection rod 5 having a joint nut 4 on both ends is inserted between vent holes 3 of a pair of PC forms, which are equivalent to each other and a bolt 7 with a washer 6 inserted is screwed into each joint nut 4, thereby fixing the paired PC panels with a specified spacing. Concrete 2 is cast between the paired P forms 1 and after the concrete 2 is cured, The bolt 7 and the washer 6 are removed from each of the joint nuts 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PC in which a concrete wall can be constructed by fixing a pair of PC formwork at predetermined intervals and placing concrete between them.
The method of fixing the formwork.

[0002]

2. Description of the Related Art In concrete wall construction, two PC formworks are arranged with a predetermined distance between them, concrete is placed between them, and the concrete wall is composed of the two PC formwork and the cast concrete. There is. In that case, as shown in FIG.
By connecting and fixing at 1, the two PC molds 1 are held at a predetermined interval. Then, concrete 2 is cast between the two PC formwork 1, and after the concrete is hardened, P
Both ends of the separator 11 protruding outward from the C-frame 1 are folded and cut. At that time, the concrete wall where the cut end faces of both ends of the separator 11 project is not aesthetically pleasing and rust easily occurs. Therefore, the end of the separator 11 is covered with a washer 12 and the surface thereof is coated with a rust preventive coating 13.

Instead of covering the cut end surface of the separator 11 with the washer 12, as shown in FIG. 3 (B), concrete is placed between a pair of PC molds 1 and hardened, and then the separator 11 is cut. The concrete of the PC form 1 around the outer edge is scraped off. And PC formwork 1 by the shaving
Fold the end of the separator 11 at the bottom of the recess of
After that, the concave portion is filled with the mortar 14 so that the end portion of the separator is rusted and the appearance is not spoiled.

[0004]

As in the prior art, the method of cutting the separator on the outer surface of the PC formwork and covering the cut portion with a washer leaves protrusions on the concrete wall, which is aesthetically pleasing. At the same time, the protruding cut end of the separator and the washer may be rusted. Further, the method of filling the mortar into the concave portion formed in the PC mold by the scraping after cutting the PC mold around the edge of the separator and cutting the end of the separator takes a lot of work. There was a problem. Therefore, the present invention makes it possible to easily fix a pair of PC formwork at predetermined intervals, prevent rust from occurring at the end of the member for fixing, and is an aesthetically pleasing concrete wall that does not have irregularities. The purpose is to be able to construct.

[0005]

The present invention provides a method for fixing a PC form that achieves the above object. In the method, a pair of PC molds having through holes at corresponding plural positions are arranged at predetermined intervals, and a connecting rod having joint nuts at both ends is provided between the through holes at corresponding positions of the pair of PC molds. The PC formwork is held at a predetermined interval by screwing the bolts through which the washers are inserted into the joint nuts at both ends of the connecting rod. Then, after concrete is cast between the pair of PC molds and hardened, the bolts and washers are removed from the joint nuts on both sides. Further, the joint nuts at both ends of the connecting rod were respectively arranged at the inner ends of the through holes of the PC form, and the mortar and the sealing material were filled in the through holes from which the bolts and washers were removed.

[0006]

According to the method of fixing the PC form of the present invention, a pair of PCs is used.
Since the formwork is arranged at a predetermined interval, the connecting rods having joint nuts at both ends are passed through the corresponding through holes, and then the bolts with washers are screwed into the joint nuts on both sides to fix the PC formwork. It can withstand the lateral pressure during driving. Also, after the cast concrete has hardened, the bolts and washers screwed into the john nut are removed, and the mortar and caulking material are filled into the through holes,
It is aesthetically preferable because it can prevent the generation of rust and there is no protrusion from the surface of the concrete wall to be constructed. In addition, the PC formwork can be fixed by the simple work of screwing in and removing the bolts, and unnecessary members for fixing the PC formwork can be removed after concrete placement.
The work of concrete wall construction using formwork is easy.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for fixing a PC form according to the present invention will be described with reference to FIGS. In the case of constructing a concrete wall by arranging a pair of PC formwork 1 at a predetermined interval and placing concrete 2 between them, the procedure is as follows.
Each PC form 1 has a pair of P's at a plurality of corresponding positions.
A through-hole penetrating perpendicularly to the plane of the PC form 1 is provided for attaching a separator-equivalent member for fixing the C form 1 at a predetermined interval. A pair of PCs arranged at predetermined intervals
Joint nuts 4 at both ends in the corresponding through holes 3 of the formwork 1.
Pass the connecting rod 5 screwed in. The connecting rod 5 is a pair of P
The joint nuts 4 screwed into the outer circumferences of the threaded portions at both ends of the connecting rod 5 are located at the inner ends of the through holes 3 of each PC mold 1 by using those slightly longer than a predetermined interval for arranging the C molds 1. Adjust the screwing amount in advance.

Next, the PC is attached to the joint nuts 4 on both sides.
The washers 6 are pressed into the outer surface of the PC form 1 by screwing the bolts 7 through which the washers 6 are inserted from the outside of the form 1, thereby fixing the pair of PC form 1 at predetermined intervals and simultaneously opening the through holes 3. The part is closed with a washer 6. In this way, several through holes 3 of the PC form 1 are connected and fixed with the connecting rod 5 and the bolts 7 and the like, and concrete is placed between the pair of PC forms 1. Since the outside of the through hole 3 is closed by the washer 6 at the time of pouring the concrete, concrete and slag do not leak out from the through hole 3. After the cast concrete is hardened, the bolts 7 screwed into the joint nuts 4 are removed together with the washers 6. Then, the resin mortar 8 is introduced from the outside of the PC mold 1 into the through hole 3 from which the bolt 7 is removed.
Alternatively, a caulking material is filled in to fill the concave portion of the surface of the PC mold 1 formed by the through hole 3 to form a flat surface. By the above, the concrete wall constructed by placing the concrete 2 between the pair of PC formwork 1 is constructed.

[0009]

According to the present invention, a connecting rod having joint nuts at both ends is passed through through holes at corresponding positions of a pair of PC formworks, and bolts passed through washers are screwed into both joint nuts. The PC form can be easily fixed at a predetermined interval. Further, when pouring concrete, the through hole of the PC formwork is closed by a washer, so that concrete or slag does not leak from the through hole. Furthermore, the bolts and washers are removed after the cast concrete is hardened, and the mortar is filled in the through holes from which the bolts have been removed. Is not compromised.

[Brief description of drawings]

FIG. 1 is a pair of PCs according to the method for fixing a PC form of the present invention.
It is sectional drawing which shows the fixed state of a formwork.

FIG. 2 is a cross-sectional view showing a state in which a through hole of a PC mold is filled with mortar or the like in the method of the present invention.

3A and 3B are two types of cross-sectional views showing a state in which a cut end surface of a separator is fixed by a conventional PC mold fixing method and a rust treatment is applied to a cut end surface of the separator.

[Explanation of symbols]

 1 PC formwork 3 Through hole 4 Joint nut 5 Connecting rod 6 Washer 7 Bolt

Claims (2)

[Claims] 1. A connection having a pair of PC molds having through holes at corresponding plural positions arranged at predetermined intervals, and having joint nuts at both ends between the through holes at corresponding positions of the pair of PC molds. The PC formwork is held at a predetermined interval by inserting the rods and screwing washers into the joint nuts at both ends of the connecting rod, and after concrete is placed between the pair of PC formwork and hardened, both sides A method of fixing a PC form, characterized in that the bolt and washer are removed from the joint nut of. 2. The joint nuts at both ends of the connecting rod are respectively arranged at the inner ends of the through holes of the PC form, and the mortar and the sealing material are filled in the through holes from which the bolts and washers are removed. The method of fixing the PC formwork according to item 1.