JPS62133225A - Centrifugal force molded concrete member - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a centrifugally formed concrete member formed by firmly connecting a desired number of centrifugally formed concrete unit members.

(Prior Art) Conventionally, a centrifugally formed concrete member consisting of a desired number of consecutive centrifugally formed concrete unit members is wound around the end of each centrifugally formed concrete unit member a and secured with a bolt, as shown in Fig. 5. They were connected by welding steel strip-shaped connecting members.

(Problems to be Solved by the Invention) The conventional centrifugally formed concrete members have the disadvantage that the connection strength is insufficient because they are connected only by the band-shaped connecting members.

(Means for Solving the Problems) The present invention eliminates the above-mentioned disadvantages and provides a centrifugal force-formed concrete member in which unit members are firmly connected so that the strength of each centrifugal acid type 5 concrete unit member can be utilized. The invention aims at
J-G unit members are connected to each other by connecting their joint members, and post-cast concrete having the same strength as that of the unit members is cast around the connected portions to make them continuous.

The centrifugally formed concrete unit member is formed by a conventional centrifugal forming method into a desired shape such as a cylinder or a prism using a centrifugal forming frame.

The concrete unit member may be reinforced by embedding reinforcing steel, PCC steel wire, or a continuous fiber body having a high tensile strength. Examples of the continuous fibers include inorganic fibers such as carbon fibers, glass fibers, and ceramic fibers, aromatic polyamides, aromatic polyetheramides, aromatic polysulfide amides, aromatic polysulfonamides, aromatic polyketoneamides, and aromatic polyamine amides. , strands of organic fibers such as vinylon, fiber bundles made by aligning the strands in parallel, all impregnated and bound with a binder such as epoxy resin, and fiber bodies consisting of fiber bundles made of the strands knitted into a braided cord. , a fiber body having a coating of a substance having affinity with concrete such as underwater adhesive epoxy resin on the surface of a fiber bundle formed by knitting the strands into a braided form, and a fiber bundle formed by knitting the strands into a braided form with an epoxy resin, A fibrous body impregnated with a binder and bound together is used alone or in combination.

It goes without saying that the centrifugally formed concrete unit member can be reinforced by dispersing short fibers of the same type as the continuous fibers.

The connecting member embedded in the centrifugally formed concrete unit member may also be used for the reinforcing reinforcing bars, PO@ wires, continuous line vertebral bodies, etc. by protruding outward from the end face of the restraining member. However, it may be a dedicated member buried near the end face of the unit member.

Post-cast concrete includes ultra-high strength concrete,
Vacuum concrete: - Fiber-reinforced concrete or the like is adjusted to have the same strength as the centrifugally formed concrete unit member.

(Example) The present invention will be described below with reference to the accompanying drawings.

FIGS. 1 and 2 show an embodiment of the centrifugally formed concrete member of the present invention using a special joining member.

Figure 1 shows a joining member 2 made of a steel plate protruding from the end surface 1a.
The figure shows a hollow prismatic centrifugally formed unit member 1 in which a plurality of pieces, eight in the illustrated one, are buried, and the desired number is determined by welding the joining member 2 of each unit member 1 as shown in the figure or by welding (not shown in the figure) They were connected by bolting, and post-cast concrete 3 made of ultra-high-strength concrete having the same strength as the unit member 1 was placed around the connected portion to make it continuous.

FIGS. 3 to 4 show other embodiments of the centrifugally formed concrete member of the present invention in which the reinforcing reinforcing bars of the centrifugally formed concrete unit member are also used as joining members.

FIG. 3 shows a centrifugally formed unit member 1 in the shape of a hollow prismatic body with a plurality of reinforcing bars arranged for reinforcement protruding from the end face 1a, eight in the illustrated one, to form a joint member 2, and the desired number of reinforcing bars. All the joining members 2 of each unit member 1 are tied together with a binding wire 4 as shown in the figure.
At the same time, a shear reinforcing material 5 is wound around the outer periphery of these joint members 2, and post-cast concrete 3 made of vacuum concrete having the same strength as the unit member 1 is poured around the joint parts. It was set up and continued.

(Effects of the Invention) As described above, according to the present invention, two or more centrifugally formed concrete unit members in which joint members protruding from the end faces are embedded are connected to each other, thereby reinforcing post-cast concrete. However, by placing post-cast concrete with the same strength as the unit member around the connecting part, these unit members can be firmly integrated with each other, and the characteristics of each unit member can be sufficiently maintained. This has the effect of providing a centrifugally formed concrete member that can be used in

[Brief explanation of drawings]

Fig. 1 is a front view of one embodiment of the centrifugally formed concrete member of the present invention, Fig. 2 is a perspective view of the centrifugally formed unit member, Fig. 3 is a front view of another embodiment, and Fig. 4 is the centrifugal force thereof. A perspective view of a forming unit member, and FIG. 5 is a front view of a conventional centrifugally formed concrete member. 1...Centrifugal force forming concrete unit member 2...Joining member 3...Post-cast concrete

Claims (1)

[Claims] Two or more centrifugally formed concrete unit members in which connecting members protruding from the end faces are embedded are connected, and post-cast concrete having the same strength as the unit members is placed around the connected parts. A centrifugal force-formed concrete member that is continuously cast.