JPH0688347A - Constructing method of post - Google Patents

Abstract

PURPOSE:To connect a hollow PC member simply and efficiently. CONSTITUTION:Hollow PC members 1, 2 are connected in upper and lower sections, and concrete is placed, thus constructing a post. Hardware for temporary fixing is driven previously to the connecting sections of both PC members 1, 2 while post main reinforcements 5, 6 are driven to both PC members 1, 2, and a cylindrical coupler 7 a lower end of which is opened is installed to the lower section of the post main reinforcement 5 of the upper-section PC member 1. On the other hand, a blocking plate 9 blocking the lower-end opening of the coupler 7 and a nut 10 as a jig fixing the blocking plate 9 are mounted previously to a screw reinforcement as the post main reinforcement 6 of the lower-section PC member 2, the state, in which both PC members 1, 2 are fixed by the hardware for temporary fixing, is brought at the time of connection, the upper end of the post main reinforcement 6 of the lower-section PC member 2 is inserted into the coupler 7 of the upper-section PC member 1 while the lower-end opening of the coupler 7 is blocked by the blocking plate 9 and fastened by the nut 10, and the inside of the coupler 7 is filled with grout 11 and the connecting sections are sealed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a column in which a column main bar is connected using a hollow PC member.

[0002]

2. Description of the Related Art Conventionally, in constructing a reinforced concrete building, a column rebar previously assembled for building a column is attached to a construction site, a column form is set to cover the column rebar, and then concrete is poured. Then the pillars are being constructed.

[0003] Generally, when constructing a pillar on the basement floor, after the concrete is placed in the pile, the inside of the hole is backfilled once, root cutting is performed while the crossbeam is installed, and then the defective concrete at the pile head is removed. After that, the pillar rebar, formwork, and concrete work are being done.

When the reverse casting method is adopted, hollow P
It is also known to use a C member and insert a hollow PC member into the pile concrete after placing the concrete into the pile.

[0005]

By the way, when the basement is deep, the hollow PC members are connected vertically and the
A method is known in which concrete is poured after connecting members to construct columns. In this case, the column main bars are preliminarily driven into the hollow PC member, but there is a problem that connection of the column main bars takes a relatively large amount of time and, in turn, the construction period of the columns becomes long.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a method of constructing a column which enables simple and efficient connection of hollow PC members.

[0007]

In order to achieve the above-mentioned object, the present invention is a method for constructing a pillar by connecting hollow PC members up and down, and then concrete-casting after connecting the members. In addition to driving the temporary fixing hardware into the connecting portion between both PC members in advance, driving the column main bar into both PC members, and attaching the tubular coupler with the lower end opened to the lower part of the column main bar of the upper PC member, while lower part An obstruction plate that obstructs the lower end opening of the coupler and a jig that fastens the obstruction plate are attached to the pillar main bars of the PC member, and at the time of connection, both PC members are fixed with a temporary fixing hardware, Insert the upper end of the column main bar of the lower PC member into the coupler of the PC member, close the lower end opening of the coupler with the closing plate and fix it with the jig, then fill the grout into the coupler and seal the connection part. To do.

[0008]

According to the present invention, a temporary fixing metal member which has been previously driven into a connecting portion between both PC members is used to establish a connection state, and the upper portion P
Insert the upper end of the column main bar of the lower PC member into the coupler of the column main bar of the C member, close the lower end opening of the coupler with the closing plate and fix it with a jig, and then fill the inside of the coupler with grout to connect. Since it is sealed, the PC member can be connected easily and efficiently.

Therefore, if the hollow PC members thus connected are used, after the reinforcement of the pile is installed, if the concrete is placed in the PC member subsequent to the placement of the concrete in the pile, one shot is made. Pillars and piles can be constructed and the construction period can be shortened effectively.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. This embodiment relates to a case where a pair of upper and lower PC members are joined to construct a column, and FIG. 1 shows a state before connection.
FIG. 2 shows an enlarged view of the main part, FIG. 3 shows the state after connection, and FIG. 4 shows another example of on-site assembly.

As shown in FIG. 1, in the present embodiment, the erection piece 3 for holding the closing mold 4 as a temporary fixing metal piece is previously struck on the connecting portions 1a, 2a of the centrifugally molded PC members 1, 2. While inserting, the pillar main bars 5, 6 on both PC members 1, 2
Type in.

Further, as shown in FIG. 2, the upper PC member 1
A cylindrical coupler 7 having an open lower end is attached to the lower portion of the column main bar 5. The coupler 7 has a hole 8 for filling grout.

On the other hand, the pillar main bar 6 of the lower PC member 2 is a threaded reinforcing bar, and a closing plate 9 for closing the lower end opening of the coupler 7 and a nut 10 for fixing the same are attached to the threaded reinforcing bar. Then, at the time of connection, as shown in FIG. 3, both the PC members 1 and 2 are fixed with the temporary fixing hardware,
The upper end of the screw reinforcing bar 6 which is the column main bar of the lower PC member 2 is inserted into the coupler 7 of the upper PC member 1, and the coupler 7
The lower end opening is closed with a closing plate 9 and fixed with a nut 10.
In this state, the grout 11 is filled in the coupler 7 through the hole 8 to seal the connection portion.

In the present embodiment, the case where the screw reinforcing bars are used as the column main bars 6 has been described as an example, but the column main bars 6 may of course be deformed rebars that are normally used.

Using the hollow PC members 1 and 2 connected in this manner, for example, after the reinforcement of the pile is installed, the concrete is cast in the PC members 1 and 2 subsequently to the placing of the concrete in the pile. It is a thing.

Therefore, according to the method of the present embodiment, the connection is made in advance by the provisional fixing hardware that has been driven into the connection portions of both PC members 1 and 2, and the connection is made in the coupler 7 of the column main bar 5 of the upper PC member 1. After inserting the upper end of the screw rebar 6 of the lower PC member 2 and closing the lower end opening of the coupler 7 with the closing plate 9 and fixing with the nut 10, the coupler 7 is filled with the grout 11 to seal the connection portion. Therefore, the PC members can be connected easily and efficiently.

After the pile reinforcement is installed, if the concrete is placed in the PC members 1 and 2 after the concrete is placed in the pile, the pillar and the pile can be constructed in one shot, which shortens the construction period. Etc. can be effectively achieved.

At the time of on-site construction, both PC members 1 and 2 may be connected laterally in advance on the ground as shown in FIG. 4 and then put in a vertical state as shown in FIG.

[0019]

As described above in detail, according to the present invention, the connection is made in advance with the temporary fixing metal fittings that have been driven into the connection portions of both PC members, and the connection is made in the coupler of the column main bar of the upper PC member. Since the upper end of the column main bar of the lower PC member is inserted, the coupler lower end opening is closed with a closing plate and fixed by a jig, the coupler is filled with grout to seal the connection portion.
Connection of the C member can be performed easily and efficiently.

Therefore, when the hollow PC members thus connected are used, after placing the reinforcing bars of the pile, if the concrete is placed in the PC member subsequent to the placement of the concrete in the pile, one shot is made. Pillars and piles can be constructed and the construction period can be shortened effectively.

[Brief description of drawings]

FIG. 1 illustrates an embodiment of the present invention and is an explanatory diagram of a state before connection.

2A and 2B are enlarged views of a main part in FIG.

FIG. 3 is an explanatory diagram showing a state after connection.

FIG. 4 is an explanatory diagram showing another example of on-site assembly.

[Explanation of symbols]

 1, 2 PC member 5, 6 Column main bar 7 Coupler 9 Closing plate 10 Nut 11 Grout

Claims (1)

[Claims] 1. A method of constructing a pillar by connecting hollow PC members up and down and then concrete-placing after connecting the members, wherein a temporary fixing metal object is preliminarily driven into a connecting portion between both PC members. At the same time, a columnar bar is driven into both PC members, and a tubular coupler having an open lower end is attached to the lower part of the column main bar of the upper PC member, while a closing plate for closing the lower end opening of the coupler to the column main bar of the lower PC member. And a jig for fixing the same are attached, and at the time of connection, both the PC members are fixed by a temporary fixing metal object, and the upper end of the column main bar of the lower PC member is inserted into the coupler of the upper PC member. In addition, the method for constructing a column is characterized in that the coupler lower end opening is closed with a closing plate and fixed by a jig, and then the coupler is filled with grout to seal the connection portion.