JPH02232438A - Precast reinforced-concrete pole and execution method of precast steel reinforced concrete pole - Google Patents

Abstract

PURPOSE:To change the design of the structural form of a PC pole and the quantity of a reinforcement easily at a field by forming a hollow section in the longitudinal direction of a PC pole member in the PC pole member and burying a sheath outside the hollow section. CONSTITUTION:A PC pole member 1 is formed in a rectangular sectional-shaped cylindrical shape, and a circular hollow section 3 is formed continuously in the longitudinal direction of the PC pole member 1 at a central section. A plurality of pole main reinforcements 5 and hoops 6 are arranged into the concrete 4 of the peripheral section of the PC pole member 1. Grout filling type sleeves are buried into the concrete 4 of the lower end of the PC pole member 1, and connected integrally to the pole main reinforcements 1 respectively. Sheaths may be buried in place of the pole main reinforcements 5 and the hoops 6. Accordingly, the design of a pole is easily changed, and the pole can be lightened, thus improving workability.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a precast reinforced concrete column and a method for constructing a precast steel reinforced concrete column, which makes it possible to simplify and speed up the construction of columns at construction sites.

[Conventional technology]

In recent reinforced concrete construction and steel-frame reinforced concrete construction, columns, columns, and floors are manufactured in factories to predetermined sizes in order to simplify and speed up on-site construction, reduce construction costs, and deal with the shortage of craftsmen. On-site, the so-called precast method is widely used, which reduces reinforcing steel work and concrete work as much as possible, and only performs assembly and joint work.

[Problems to be Solved by the Invention] However, in the conventional precast construction method, each precast member such as a column, a beam, and a floor is manufactured into a substantially completed member during the manufacturing process.

For this reason, the weight is quite heavy, and handling such as transportation and assembly requires large heavy machinery, which is not easy.

Another drawback was that the structural type and amount of reinforcing bars were determined at the manufacturing stage of the precast components, making it impossible to change the design at all on site. This invention was proposed in view of these circumstances.
The purpose of the present invention is to provide a precast reinforced concrete construction method or a method for constructing precast steel reinforced concrete columns that improves transportability and workability due to the light weight of precast members, and also allows for design changes such as structural type and amount of reinforcement at the site. There are some things that are.

[Means to solve the problem]

This invention relates to a method for constructing a precast reinforced concrete column or a precast steel reinforced concrete column, and in order to construct a precast concrete column,
A reinforcing bar consisting of main bars and hoop bars is attached to the pillar construction part of the structure, or multiple main pillar bars are attached vertically to the reinforcing bars and to the outside of the bar, followed by a hollow part in the center and a hollow part around it. A P where multiple main lines are installed consecutively in the vertical direction.
In the case of the former PC column member, the PC column member is a C column member or a PC column member which has a hollow part in the center and a plurality of sheaths arranged in succession in the vertical direction instead of the main reinforcement around the hollow part. The reinforcing bar cage is inserted vertically into the hollow part of the column member, and each hollow part is filled with concrete, and if necessary, the main reinforcing bars in the concrete of the PC column member and the steel bar protruding from the column construction part are installed. The main reinforcing bars are connected by grout-filled sleeves, and in the case of the latter PC column member, the reinforcing bar cage is attached to the hollow part of the PC column member, and the main reinforcing bar attached vertically around the reinforcing bar cage is attached to the sheath, respectively. By attaching it vertically to the inserted state, and filling the sheath with grout and filling the hollow part with concrete, it is also possible to construct a cast steel reinforced concrete column by adding a steel column instead of a reinforcing cage to the column construction part. This objective is achieved by installing steel columns and reinforcing bars together.

〔Example〕

The present invention will be explained below with reference to an illustrated embodiment.

In the method for constructing a precast reinforced concrete column or a precast steel reinforced concrete column according to the present invention, a precast reinforced concrete column member (hereinafter referred to as a PC column member) as illustrated in FIGS. 1, 2, 3, and 4 is used. Use 1 or 2.

The PC column member 1 is formed to have a rectangular cross-section, and a circular hollow portion 3 of a predetermined size is formed in the center portion continuously in the longitudinal direction of the PC column member l, so that the PC column member l has a cylindrical shape with a rectangular cross section. (See Figures 1 and 2). Further, a plurality of column main reinforcements 5, 5 and hooves 6, . . . are arranged in the concrete 4 around the PC column member work.

Further, grout-filled sleeves 7, 7 are buried in the concrete 4 at the lower end of the PC column member 1, and the grout-filled sleeves 7, 7 are integrally connected to the column main reinforcements 5, 5, respectively.

On the other hand, the PC column member 2 is formed to have a rectangular cross section like the PC column member 1, has a circular hollow part 3 of a predetermined size in the center, and is formed into a cylindrical shape with a rectangular cross section like the PC column member 1. has been done.

Furthermore, instead of arranging the column main reinforcements 5 and hoop reinforcements 6 in the concrete 4 around the PC column member 2, a plurality of sheaths 8, 8 are continuously buried in the longitudinal direction of the PC column member 2. , a plurality of hoop reinforcements 6 are arranged on the outside as necessary (see Fig. 4).

Note that the cross-sectional sizes of the PC column members 1 and 2 and the hollow portion 3, and the diameters of the main reinforcement 4, hoop reinforcement 6, grout-filled sleeve 7, and sheath 8 are determined according to the scale of the building.

Further, the shape of the PC pillar members 1 and 2 does not necessarily have to be rectangular, but may be circular, elliptical, or polygonal.

Furthermore, the shape of the hollow portion 3 does not necessarily have to be circular like the shapes of the PC pillar members 1 and 2, and various shapes can be considered.

Furthermore, the PC column members 1 and 2 can be easily manufactured by conventional methods such as centrifugal force manufacturing.

Next, the method of constructing a column using the PC column member 1 will be explained step by step (see Figs. 5 to 9). ■ First, a cylindrical reinforcing bar basket is assembled by arranging a plurality of column main reinforcements 9, 9 in the column construction part of the floor slab, and arranging hoop reinforcements 10, etc. around them (No. 5 (See Figure 6).

The amount of reinforcement of the main reinforcement 9 and the hoop reinforcement 10, . . . is determined appropriately depending on the magnitude of the external force that the column receives.

In addition, when the column is a steel reinforced concrete column, the column main reinforcement 9 and the hoof reinforcement 10 are replaced with the steel frame column 13 or the steel frame column 3 and the reinforcing bars are installed together (No. 8,
(See Figure 9). ■ Next, insert the main pillar reinforcements 9, 9 and hoop reinforcements 10 into the hollow part 3 of the PC column member 1 on the floor slab, and insert the main reinforcement bars 11 on the floor immediately below that protrude from the floor slab. .11 is inserted vertically into the grout-filled sleeves 7, 7 (see Figure 7). ■ Next, by filling grout material into the grout-filled sleeves 7, 7, the main column reinforcement 11.
11 and the main reinforcement bars 5 in the concrete 4 of the PC column member 1 are integrally connected to each other. Subsequently, concrete 12 is filled in the hollow part 3 and cured to construct the column continuously and integrally on the column on the floor immediately below.

Next, a method of constructing a column using the PC column member 2 will be explained (see FIGS. 10 to 14).

■ First, the column main reinforcements 9 are arranged in the column construction part of the floor slab 1, and the hoop reinforcements 10 are placed around the main reinforcements 9, 9.
Assemble a cylindrical reinforcing cage by arranging the reinforcing bars (see Figure IO). In addition, the main column reinforcement 9 and the hoop reinforcement 1
A plurality of column main reinforcements 14, 14 are arranged on the outside of 0, .

The company main line 14.14 will be integrally connected and structurally continuous with the company main line 1 and 1l on the floor immediately below.

In addition, when the column is a steel reinforced concrete column, instead of arranging the main reinforcement 9 and the hoop reinforcement 10, the steel frame column 13 or the steel column 13 and the reinforcing bars are attached vertically, and the main reinforcement is arranged around it ( (See Figure 13.14). (2) Next, the PC column member 2 is placed on top of the floor slab, and the main column reinforcement 14.14 is passed through the sheath 8.8 of the PC column member 2, and the main reinforcement 9.9 and the hoop reinforcement 10. ... is inserted into the hollow part IO.

(Subsequently, the sheaths 8, 8 are filled with grout material, and the hollow part is filled with concrete I2, and the column is continuously and integrally placed on top of the column on the floor immediately below by sufficiently curing. To construct.

〔Effect of the invention〕

Since the present invention has the above configuration, it has the following effects.

■ A hollow part is formed in the PC pillar member continuously in the longitudinal direction of the PC pillar member, or a hollow part is formed and a hole is buried outside the hollow part, so it is easy to By installing reinforcing bars or steel columns in the hollow portion and the sheath, design changes such as the structural type of the columns and the amount of reinforcing bars can be easily made as necessary.

■ Also, since the center part is hollow, it is lighter, so even relatively small heavy machinery can be used for transportation and assembly, significantly improving work efficiency.

[Brief explanation of the drawing]

1 to 14 show an embodiment of the present invention, and FIGS. 1, 2, 3, and 4 are cross-sectional views of PC pillar members, and FIGS. The figures show the construction method of the pillars. 11 and 12 are longitudinal sectional views of the column. 1, 2... PC column member, 3... Hollow part, 4... Concrete, 5... Column main reinforcement, 6... Hoop reinforcement, 7.
... grout-filled sleeve, 8... sheath, 9.
...Column main reinforcement, 10...Hoop reinforcement, 11...Column main reinforcement,
12... Concrete, 13... Steel column, 14...
・Column main reinforcement. Figure 1 Figure 2 Figure 3 Figure l4

Claims (7)

[Claims] (1) A reinforcing bar cage consisting of column main reinforcement and hoop reinforcement is attached vertically to the column construction part of the structure, followed by a hollow part in the center and multiple column main reinforcements continuous in the vertical direction in the surrounding concrete. A method for constructing a precast reinforced concrete column, which comprises vertically attaching a precast PC column member with the reinforcing bar cage inserted into a hollow part of the PC column member, and filling the hollow part with concrete. (2) Attach a reinforcing bar made of column main reinforcement and hoop reinforcement to the column construction part of the structure, and attach multiple column main reinforcement vertically around it, then attach a hollow part in the center and multiple pillar reinforcements around it. A PC column member having sheaths arranged in a vertical direction is attached vertically to a hollow part of the PC column member with the reinforcing bar cage inserted, and the column main reinforcement on the outer periphery of the reinforcing bar cage inserted into the sheath, and A method for constructing a precast reinforced concrete column, comprising filling the sheath with grout and filling the hollow portion with concrete. (3) A grout-filled sleeve is buried in the concrete at the lower end of the PC column member, connected to the column main reinforcement in the concrete of the PC column member, and the column main reinforcement that protrudes from the column construction part is attached to the grout-filled sleeve. 2. The method of constructing a precast reinforced concrete column according to claim 1, wherein the grouting type sleeve is filled with grout material at the same time as the grouting sleeve is inserted. (4) The method for constructing a precast steel reinforced concrete column according to claim 1, 2, or 3, characterized in that a steel column is vertically attached to the column construction portion of the structure instead of a reinforcing cage. (5) The structure according to claim 1, 2, 3, or 4, characterized in that a steel column and a plurality of reinforcing bars are vertically attached to the column construction part of the structure instead of a reinforcing bar cage. Construction method for precast steel reinforced concrete columns. (6) Construction of a precast reinforced concrete column according to claim 2, 4, or 5, characterized in that a plurality of hoop reinforcements are arranged around the sheath so as to integrally surround the sheath. Method. (7) Construction of a precast steel reinforced concrete column according to claim 2, 4, or 5, characterized in that a plurality of hoop reinforcements are arranged around the sheath so as to integrally surround the sheath. Method.