JPH06105003B2 - Centrifugal molded steel rod reinforced concrete member - Google Patents

Description

Description: “Industrial application field” The present invention relates to a centrifugally-formed steel rod-reinforced concrete member that is preferably used when constructing structural members such as columns and beams of buildings. .

“Conventional Technology and Its Problems” Conventionally, this type of centrifugally-formed steel rod reinforced concrete member has not been known, and reinforced concrete (RC) is known as a technology close to this.

In the RC method and the SRC method, after reinforcing bars are laid in places where columns and beams should be constructed, and after surrounding them with a formwork,
It is constructed by filling concrete inside the formwork. However, with these RC and SRC construction methods, it is necessary to assemble and dismantle the formwork at the construction site,
Since the construction cost has increased due to the shortage of workers in recent years, a lot of construction time and construction cost are required, and there was construction management.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a centrifugally-formed steel rod-reinforced concrete member that can be suitably used when constructing structural members such as columns and beams.

"Means for Solving the Problem" The centrifugally formed steel rod reinforced concrete member according to the present invention is a centrifugally formed steel rod reinforced concrete member that is connected in the axial direction to form a long structural member such as a pillar or a beam. In relation to the concrete member, a tubular concrete layer is formed by centrifugal molding, and a plurality of steel rods are arranged in the concrete layer at predetermined intervals in the circumferential direction and along the axial direction. Further, in the axial middle portion of the concrete layer, a connecting member including a steel pipe fixed along the side surface of the concrete layer and pressure bearing plates arranged at both end faces of the steel pipe is provided. The steel rod has one end protruding from one end surface of the concrete layer with a predetermined length,
The other end portion is arranged at a position retracted by a predetermined length from the other end surface of the concrete layer, and the other end portion of the steel rod has a filling space in which a filler is filled, and the concrete layer The inside of the other end of the concrete layer is opened so as to face the outside of the other end surface of the concrete layer, and one end of a steel rod of another centrifugally-formed steel rod-reinforced concrete member is inserted into the filling space and the filling space is filled. It is characterized in that a fitting member for fixing and connecting both steel rods is fixed by being filled with the material.

[Operation] In the centrifugally-formed steel rod reinforced concrete member according to the present invention, since the concrete layer is formed by centrifugal molding, a solid and high-strength concrete layer is formed.
Further, when a load is applied to the member through the connection member, the load is transmitted to the concrete layer through the bearing plate and the steel pipe of the connection member. Furthermore, the centrifugally formed steel rod reinforced concrete members according to the present invention are connected in the axial direction of the members to form a long structural member such as a pillar or a beam. This is done by connecting them together. That is, one end of a steel rod protruding to one end of one member is inserted into a fitting member fixed to the other end of the other member, and mortar or the like is filled in the filling space inside the fitting member. By filling the above-mentioned filling material, both steel rods are integrally fixed and connected and fixed. By doing so, it is possible to firmly connect the two members to each other with a simple operation as compared with the case of connecting them by welding.

[Embodiment] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are views showing an embodiment of a centrifugally formed steel rod reinforced concrete member according to the present invention. In these drawings, reference numeral 1 is a centrifugally formed steel rod reinforced concrete column member (centrifugal formed steel rod). Reinforced concrete member: hereinafter referred to simply as "column member".

As shown in these figures, the pillar member 1 according to the present embodiment is
A tubular concrete layer 2 is formed by centrifugal molding, and a plurality of steel rods 3 are arranged in the concrete layer 2 at predetermined intervals in the circumferential direction and along the axial direction thereof.
Is further provided. Further, at the intermediate portion in the axial direction of the concrete layer 2, the connecting member 5 is provided corresponding to the joining position of the beams 7 and 7 (see FIG. 3) joined to the pillar H. It has a general configuration.

The steel rods 3, ... Are arranged at a position where one end 3b of the steel rod 3 projects from the upper end surface of the concrete layer 2 with a predetermined length and the other end 3a is pulled upward from the lower end surface of the concrete layer 2 with a predetermined length. It is provided (see FIG. 4), and the other end portion 3a has a function of slightly holding the gap for filling the injection material from the lower end surface of the concrete layer 2 (described later). A cylindrical sleeve (fitting member) 6 is fixed so as to project so that its opening faces downward. In the present embodiment, when the pillar H is constructed, the steel rod 3 reaches the substantially central portion in the length direction of the sleeve embedded in the concrete layer of the other pillar member to which one end 3b thereof is connected. The protrusion length is set to the other end 3a, and the other end 3a is set to be located at the middle portion in the length direction of the sleeve 6 of the column member 1. As the steel rod 3, a well-known and conventional steel rod, for example, a PC steel rod, a reinforcing bar, or the like is preferably used.

As shown in FIG. 1, the joint member 5 has an outer diameter substantially equal to the diameter of the concrete layer 2, and a joint portion steel pipe (steel pipe) 8 fixed along the side surface of the concrete layer 2.
And pressure-bearing plates 9 and 9 mounted on the upper and lower end surfaces of the joint portion steel pipe 8, respectively, and on the upper and lower surfaces of the bearing plate 9 and 9, respectively, having the same diameter as the joint portion steel pipe 8. Steel pipe 1
It is composed of 0 and 10. The pressure support plate 9 is an annular member arranged so as to project to the outside of the side surface and the inside of the side surface of the steel pipe 8 of the joint portion, and the length of the pressure plate 9 protruding to the inside of the steel pipe 8 of the joint portion is the concrete The shape is formed so as to be substantially the same as the thickness of the layer 2. Then, as shown in FIG. 3, the beams 7 are joined to the side surfaces thereof.

FIGS. 3 to 5 show a pillar H constructed by the above-mentioned pillar member 1. In the pillar H, the pillar member 1, ... Is a beam 7 on the upper floor and a beam 7 on the lower floor. It is constructed by connecting at approximately the middle portion of 7, that is, the middle position of the upper and lower layers.

Next, regarding the structure of the connecting portion C of these pillar members 1,
Referring to FIG. 5 and FIG. 5, the sleeve 6 is disposed at the lower end of the column member 1a located above the connecting portion C, and inside the sleeve 6, the connecting portion C The steel rod 3 of the pillar member 1b located below is inserted from below the sleeve 6, and the steel rods 3 of the upper and lower pillar members 1a and 1b are ...
The end portions 3a and 3b of the sleeve 6 are arranged so as to be located at a substantially middle portion in the length direction of the sleeve 6. As shown in the figure, the sleeve 6 has a filling space in which a filling material is filled by bulging the middle portion and making the middle portion larger in diameter than the upper and lower ends thereof. By filling the filling space with the mortar 12 (filling material), the steel rods 3, ... Are fixed inside the sleeve 6.

Next, the procedure of the method for manufacturing the member 1 according to the present embodiment and the method for constructing the pillar H using the member 1 will be described.

(I) First, after arranging the joint member 5 in a cylindrical mold having an inner diameter substantially equal to the outer diameter of the concrete layer 2 to be formed, the steel rods 3 are arranged at intervals in the circumferential direction of the mold. , And the sleeve 6 is attached to the other end 3a. In this state, concrete is placed inside the formwork,
Centrifugal molding is performed before the concrete is hardened, and then autoclave curing or the like is performed to form the cast concrete into the concrete layer 2. At this time, for the purpose of fixing the positions of the steel rods 3, ..., By positioning a reinforcing bar or the like around the steel rods 3, .. Further, the steel rod 3 formed in the cylindrical basket shape,
It is also possible to provide a spacer or the like on the outer periphery of the spacer for keeping a constant distance from the inner surface of the mold.

In this way, a plurality of pillar members 1 shown in FIGS. 1 and 4 are manufactured in advance. It should be noted that this manufacturing process does not necessarily have to be carried out at the construction site, and factory production and the like are fully possible.

(II) Next, as shown in FIG. 6, after the pillar member 1b is erected in a state where the side from which the one end 3b, ... Of the steel rod 3 ,. The adhesive filler 13 is spread on the top surface of the concrete layer 2 to a predetermined thickness and leveled. After this,
After the pillar member 1a is arranged above the pillar member 1b, one end 3b of the steel rod 3 of the lower pillar member 1b and the sleeve 6 of the upper pillar member 1a are arranged.
Align with.

(III) Further, as shown in FIG. 7, the lower pillar member 1b
Steel rod 3 is built in the upper part of the pillar member 1b located below so that the steel rod 3 of the above is inserted into the sleeve 6 of the upper pillar member 1a. Remove the filler 13 and finish.

(IV) Finally, the mortar 12 is poured into the sleeve 6 and, as shown in FIG. 1, the steel rods 3, ... Are fixed in the sleeve 6 so that the upper and lower steel rods 3 ,. To be mechanically connected via. The method of filling the mortar 12 into the sleeve 6 is arbitrary, but as an example, in the manufacturing process of the pillar members 1, ..., At the lower end of the pillar members 1 ,. There is a method in which a hole 14 for mortar injection to reach to is formed by a drill or the like, and the mortar 12 is injected and filled through this hole 14.

Then, mortar may be injected from the outside of the concrete layer 2 into the gap formed between the pillar members 1a and 1b in this step to connect the pillar members 1a and 1b.

As described above, according to the pillar member 1 according to the present embodiment, since the concrete layer 2 is formed by centrifugal molding, excellent characteristics of solid and high strength can be obtained, and the concrete layer 2 has an axial direction in the concrete layer 2. By arranging the steel rods 3, ... That extend in the vertical direction, the bending of the member and the axial yield strength can be improved.

Further, the joint member 5 arranged at the intermediate portion in the axial direction of the concrete layer 2 constituting the pillar member 1 has a joint portion steel pipe 8 having substantially the same diameter as that of the concrete layer 2, and the joint portion steel pipe 8 Since the bearing plates 9 and 9 are respectively mounted on the upper and lower end surfaces, the loads from the beams 7 and 7 are effectively transmitted to the concrete layer 2 through the bearing plates 9 and 9, and Due to the presence of the steel pipe 8 in the part, the joint member 5 and the concrete layer 2
And can behave as a unit, and a large yield strength can be expected. Therefore, the pillar H that can be suitably used as a building structure can be constructed.

Further, the pillar member 1 is fixed so that a part of the joint member 5 is embedded in the side surface of the concrete layer 2, and is supplied in a state where the joint member 5 is attached in advance, which makes the construction difficult. It has advantages such as being easy.

In addition, since the pillar member 1 only needs to connect the pillar members 1 along the material axis direction of the pillar H to be constructed, it is not necessary to assemble a formwork at the construction site. Can be reduced. Moreover, even in the connection work,
The pillars 1a and 1b can be easily positioned by simply inserting the steel rods 3, ... Which project from one end of the other pillar member 1b into the sleeve 6 arranged at one end of the one pillar member 1a. It is possible to efficiently perform the subsequent connecting work, and also to inject and fill the mortar 12 into the sleeve 6 in a state where the steel rods 3 of the column members 1a and 1b are inserted,
By solidifying, the upper and lower steel rods 3 and 3 are sleeve 6
Can be mechanically connected to each other, whereby the moment acting on the column member 1a can be transmitted to the other column member 1b. Further, by filling the space between the pillar members 1a and 1b with a structural adhesive filler such as mortar, or by contacting and connecting the end surfaces of the concrete layers 2 and 2 of the pillar members 1a and 1b to each other, the pillar member 1a The load acting between the column member 1b and the column member 1b can be mutually transmitted as an axial force of the column H.

Furthermore, since the pillar member 1 according to the present embodiment is connected at the intermediate portion in the material axis direction when the pillar H is constructed, the connecting portion serves as an inflection point of the moment,
Sufficient strength can be obtained without connecting the steel rods 3 ...

The details of the centrifugally-formed steel rod-reinforced concrete member according to the present invention are not limited to the present embodiment, and various modifications are possible. As an example, after the pillar members 1a and 1b are built, concrete can be filled in the cavities inside the concrete layers 2 and 2 in the pillar members 1a and 1b to construct a pillar having improved strength. Of course. Furthermore, the structure and construction method of the end portions of the pillar members 1a, 1b are not limited to the above-mentioned embodiment, and for example, as a sleeve for connecting and fixing the steel rods 3, ... The present invention is not limited to the above embodiment as long as it has a space and both steel rods are integrally fixed and connected and fixed by the filling material.

In the above, the example of forming the pillar is described, but when forming the beam, the centrifugally-formed steel rod reinforced concrete may be manufactured with a rectangular cross section of the member cross section. For example, the vertical relationship in the embodiment of the pillar may be set as the left-right relationship.

"Effects of the Invention" According to the centrifugally formed steel rod reinforced concrete member according to the present invention, since the concrete layer is formed by centrifugal molding, it is possible to obtain solid and high strength, and of course, through the connection member. Even when a load is applied to the member, it is effectively transmitted to the concrete layer through the bearing plate and steel pipe of the connection member, so these steel pipe, bearing plate and concrete layer behave as a unit, and a large yield strength is expected. can do. Furthermore, when these are connected to construct a structural member such as a pillar or a beam, one end of a steel rod protruding to one end of one member is fixed to the other end of the other member. By inserting into the joining member and filling the filling space inside the fitting member with a filling material such as mortar, the two steel rods are integrally fixed and connected and fixed,
The solid connection structure required as a structural member can be easily obtained, and the construction time and construction cost can be reduced.

[Brief description of drawings]

1 and 2 are views showing an embodiment of a centrifugally-formed steel rod reinforced concrete member according to the present invention, and FIG. 1 is an enlarged cross-sectional view showing the structure of a joint member of the member. FIG. 2 is a sectional view taken along the line II-II ′ in FIG. 1, and FIGS. 3 to 5 are views showing columns constructed by the centrifugally-formed steel rod reinforced concrete member according to the present invention. FIG. 3 is a front view showing the entire structure of the column, FIG. 4 is a cross-sectional view enlarging and showing the connecting portion of the centrifugally formed steel rod reinforced concrete member, and FIG. 5 is a line VV ′ in FIG. 6 to 7 are cross-sectional views taken along the arrow, showing the procedure for constructing a column using the centrifugally-formed steel rod reinforced concrete according to this embodiment. H: Pillar (structural material), 1 ... Centrifugal molded steel rod reinforced concrete pillar member (centrifugal molded steel rod reinforced concrete), 2 ...
Concrete layer, 3 ... steel rod, 3a ... other end, 3b ... one end, 5 ... connection member, 6 ... sleeve (fitting member),
8 ... Port steel pipe (steel pipe), 9 ... Pressure plate, 12 ... Mortar (filler).

Front page continuation (72) Inventor Kenichi Ikeda 2-16-1 Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Yasushi Watanabe 2-16-1 Kyobashi, Chuo-ku, Tokyo Shimizu Construction Stocks In-house (72) Inventor Takanori Sato 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Hideyo Shiokawa 2--16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (56) References JP-A-58-195654 (JP, A) JP-A-61-179948 (JP, A) JP-B-55-24539 (JP, B2) JP-B-49-17942 (JP, B2)

Claims (1)

[Claims] 1. A centrifugally-formed steel rod reinforced concrete member which is connected to a plurality of members in the axial direction to form a long structural member such as a pillar or a beam. A tubular concrete layer is formed by molding, and a plurality of steel rods are arranged in the concrete layer at predetermined intervals in the circumferential direction thereof and along the axial direction thereof. At the intermediate portion in the axial direction of, a joint member consisting of a steel pipe fixed along the side surface of the concrete layer and bearing plates arranged on both end faces of the steel pipe is provided, and the steel rod is One end projects from the one end surface of the concrete layer by a predetermined length, the other end is arranged at a position retracted by a predetermined length from the other end surface of the concrete layer, and the other end of the steel rod is provided. , Filling the inside with filler Has a filled space and is opened from the inside of the concrete layer so as to face the outside of the other end surface of the concrete layer, and one end of the steel rod of another centrifugally formed steel rod reinforced concrete member is in the filled space. Centrifugally formed steel rod reinforced concrete, characterized in that a fitting member for fixing and connecting both steel rods integrally is fixed by being inserted into the filling space and filling the filling space with the filling material. Element.