JPH09177316A - Form doubling as spacer of pc post joining part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a form which serves also as a spacer which is capable of joining PC posts with each other easily. SOLUTION: A plurality of weir boards 6a and 6b are set up windingly in a joining area of upper and lower PC posts 1 and 2 in such a fashion that they may surround the joining area, thereby closing up a clearance between the PC posts 1 and 2 while a plurality of fixing areas 6d and 6e are provided, which are projectingly mounted on the weir boards 6a and 6b and bolted with the outside surfaces 1a and 1b and 2 and 2b of the PC posts 1 and 2 respectively and which are designed to fix the weir boards 6a and 6b with the outside surfaces 1a and 1b of the PC posts 1 and the outside surfaces 2a and 2b of the PC post 2, thereby constituting this form which serves as a spacer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spacer for holding a predetermined gap in a joint between PC columns and a frame for injecting mortar into the gap between upper and lower PC columns when joining the PC columns. A mold used also as a spacer for a PC column joint (hereinafter referred to as "spacer used mold").

[0002]

2. Description of the Related Art Recently, factory-produced precast concrete pillars (hereinafter referred to as "PC pillars") have been used as pillars of reinforced concrete structures in order to save labor in on-site construction and shorten the construction period. The PC column is used by integrally connecting the column main bars projecting at the ends and filling the periphery with mortar to integrally join them.

FIG. 5 shows an example of a conventional method of joining upper and lower PC columns. In the figure, reference numerals 1 and 2 are vertically stacked and integrally joined, and PC columns 3 are upper and lower PC columns 1, 2 respectively. Column reinforcements 4 which are respectively laid in the concrete and whose ends project from the ends of the upper and lower PC columns 1 and 2, respectively, are continuous at the joints between the upper and lower PC columns 1 and 2 and around them. Formed when the mortar is filled in the gap between the upper and lower PC columns 1 and 2 and is fixed by a binding material such as a wire, and the reference numeral 5 indicates the outer surface portions 1a and 1b of the PC column 1. Is a grout material injection port for injecting grout material such as mortar into the coupler that connects the main pillars 3 of the upper and lower PC pillars 1 and 2 and into the gap between the upper and lower PC pillars 1 and 2.

In such a structure, in order to join the upper and lower PC columns 1 and 2, the PC column 1 is installed on the PC column 2 by hanging a crane (not shown), and the main columns 3 of both columns are connected. Join each other through a coupler. Next, the upper and lower PC pillars 1,
A form 4 is installed around the joint of 2 to close the gap between the upper and lower PC columns 1 and 2. Next, the upper and lower PC columns 1 and 2 blocked from the grout material injection port 5 by the coupler and the mold 4
A grout material such as mortar is injected into the gap between them. Then, when the grout material exhibits sufficient strength, the form 4 is removed.

[0005]

Conventionally, the upper and lower PC columns 1 and 2 are joined by the method as described above, but the form 4 is made of plywood or a shackle and has a predetermined size. It is very uneconomical because it is troublesome to make the formwork because it needs to be cut or processed into shapes, and a large amount of wood chips are generated by the processing, and these can hardly be diverted. There was such a problem. Further, since the formwork 4 is fixed by a binding material such as a numbering wire, not only is the mounting of the formwork 4 troublesome, but the installation is also messy and there is a problem in construction accuracy.

The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a spacer / form frame for a PC pillar joint portion, which enables the PC pillars to be joined easily and securely. To aim.

[0007]

A spacer-cum-form of a PC column joint portion according to the present invention is installed around a joint portion of a PC column by winding it around the joint portion of the PC column and closing a gap portion of the joint portion. It comprises a weir plate and a plurality of fixing portions that are provided so as to project from the weir plate, are bolted to the outer surface portions of the PC columns, and fix the weir plate to the PC columns.

[0008]

1 to 4 show an embodiment of a spacer-cum-form according to the present invention. In the drawings, the same parts as those of the conventional example are designated by the same reference numerals, and the description thereof will be omitted. To do.

Reference numeral 6 is attached to the joining portion of the upper and lower PC columns 1 and 2 by winding it around the joint portion so as to keep the gap A between the upper and lower PC columns 1 and 2 constant and to surround the periphery of the gap A. A form also used as a spacer for closing, and 7 is a steel beam made of H-shaped steel, which is joined to the outer surface of the PC column 2.

The spacer-cum-form 6 is installed outside the gap A between the upper and lower PC columns 1 and 2, and both upper and lower sides are attached to the outer surface portions 1a and 2a and 1b and 2b of the upper and lower PC columns 1 and 2, respectively. And the weir plates 6a and 6b that block the outside of the gap A and the weir plates
A hinge 6c attached to one end of 6a and 6b and rotatably connecting the weir plates 6a and 6b, and outer side portions 1a and 2a of the upper and lower PC columns 1 and 2 on both upper and lower sides of the weir plates 6a and 6b. Outer surface parts 1 of the upper and lower PC columns 1 and 2 which are respectively projected along 1b and 2b.
A plurality of fixing pieces 6d, which are bolted to a, 1b and 2a, 2b by fixing bolts 8, respectively connect the weir plates 6a and 6b to the PC column 1, and the weir plates 6a and 6b to the PC column 2, respectively.
And 6e, and connecting portions 6f and 6g that project from the other ends of the barrier plates 6a and 6b and are connected to each other by a connecting bolt 9.

Bolt holes 10 for inserting the fixing bolts 8 are formed in the fixing pieces 6d and 6e, and the bolt holes 10 of the fixing piece 6e are loose holes so that the positions of the dam plates 6a and 6b can be adjusted. . Further, the fixing piece 6e is integrally formed with the dam plates 6a and 6b, and the fixing piece 6d is attached to the dam plates 6a and 6b after the size of the gap A is determined when the upper and lower PC columns 1 and 2 are joined. It is projected by welding.

The connecting portion 6f is formed by extending the other end of the weir plate 6a, the connecting portion 6g is formed by bending the other end of the weir plate 6b into an L shape, and the connecting portions 6f and 6g are further connected to each other. Has a bolt hole 11 through which the connecting bolt 9 is inserted.

Further, the dam plate 6a has a grout material injection hole 13 for injecting the grout material 12 such as mortar into the gap A.
Are formed.

Form frame 6 also serving as a spacer constructed in this way
Are installed at the joints of the upper and lower PC columns 1 and 2 as a set, and the outer surface parts of the two adjacent upper and lower PC columns 1 and 2 respectively.
It is installed by attaching to 1a and 1b and 2a and 2b, and the connecting portions 6f and 6g are connected by the connecting bolts 9 to form a rectangular ring shape, and the gap A between the upper and lower PC columns 1 and 2 is formed. It is blocking the surroundings.

Further, the fixing pieces 6d and 6f are fixed to the outer side surface portions 1a and 1b and 2a and 2b of the upper and lower PC columns 1 and 2 by the fixing bolts 8 so that the upper and lower PC columns 1 and 2 are connected, and , A gap A of a certain size at the joint between the upper and lower PC columns 1 and 2.
Is secured.

Next, a method for joining the upper and lower PC columns 1 and 2 using the frame for spacers according to the present invention will be briefly described.

(1) First, the PC column 1 is hung and installed right above the PC column 2 with a crane or the like, and the ends of both column main bars 3 are temporarily connected by a coupler 14.

(2) Next, two spacer-cum-forms are installed at the joints between the upper and lower PC columns 1 and 2 by bolting them to the outer surface portions 2a and 2b of the PC columns 2 with fixing bolts 8. In addition, the spacer-cum-forms are connected in a ring shape by the connecting bolt 9.

(3) Next, the size of the gap A between the upper and lower PC columns 1 and 2 is determined, the fixing piece 6d is attached to the dam plates 6a and 6b by welding, and the fixing piece 6d is attached to the PC column 1. The outer side surface portions 1a and 1b are fixed with fixing bolts 8, respectively.

(4) Then, the inside of the coupler 14 and the upper and lower PCs
The grout material 12 such as mortar is press-fitted into the gap A between the columns 1 and 2 through the grout material injection port 13 and is sufficiently cured until the grout material 12 exhibits sufficient strength. Then, when the mortar develops sufficient strength, the spacer-cum-form 6 is removed.

By providing the dam plate 6a with the grout material inlet 13, the lower grout material inlet 5 of the upper and lower grout material inlets 5 conventionally provided on the outer surface of the PC column 1 is omitted. can do.

Further, the spacer-cum-form frame 6 is formed as the dam plates 6a and 6b in the shape of an arc having a predetermined curvature, so that the spacer-form mold 6 serves as a spacer-form mold for joining the circular PC columns together. Can also be used.

[0023]

EFFECTS OF THE INVENTION The spacer-cum-form according to the present invention has the above-described structure, and a plurality of weir plates that are continuously installed in the periphery of the joint portion of the PC column and close the periphery of the joint portion. In particular, since it is configured to have a plurality of fixing portions projecting from the barrier plate, bolted to the outer surface portions of the PC columns, and joining the PC columns to each other,
Since it is fixed to the outer surface of the pillar by bolting, P
The effect is that the C columns can be securely temporarily joined together and the gap for injecting grout material such as mortar into the joint can be surely secured, so that the construction accuracy is improved and the PC columns can be securely joined together. There is.

Further, since it serves both as a super-spacer for holding a gap necessary for the joint portion of the PC column and as a formwork for press-fitting the mortar into the gap portion of the joint part, the spacer and the formwork are installed at the same time. By doing so, you can save labor in construction,
It is also extremely economical.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a joint portion between upper and lower PC columns showing a usage state of a frame that also serves as a spacer.

FIG. 2 is a cross-sectional view of a joint portion between upper and lower PC columns in FIG.

FIG. 3 is a sectional view taken along line aa in FIG.

FIG. 4 is a sectional view taken along line bb in FIG. 1;

FIG. 5 is a perspective view showing a conventional joint portion between upper and lower PC columns.

[Explanation of symbols]

1,2 PC pillars, 3 pillar main bars, 4 molds, 5 grout material injection port, 6 spacer molds, 6a, 6b weir plates, 6c hinges, 6d, 6e fixing parts, 6f, 6g ... Connection, 7 ... Steel beam,
8 ... Fixing bolts, 9 ... Connecting bolts, 10,11 ... Bolt holes,
12 ... Grout material, 13 ... Grout material inlet, 14 ... Coupler.

Claims (1)

[Claims] 1. A formwork which is installed at a joint portion of a PC column to be joined in a material axis direction, holds a predetermined gap portion in the joint portion of the PC column, and fills the grout material into the gap portion. In a frame that also serves as a spacer for a PC column joint part, a plurality of weir plates installed around the joint part of the PC column and wound around the joint part to close the gap part of the joint part, and projecting on the weir plate. And a plurality of fixing portions for fixing the dam plate to the PC pillar by bolting to the outer surface of the PC pillar, respectively. Combined formwork.