JPS6112766B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing concrete composite panels.

Concrete composite panels with a sandwich-type hybrid structure have excellent load-bearing capacity and deformability, and are therefore used for a variety of purposes. This type of concrete composite panel has a plurality of girder webs between a pair of opposing steel plates, and a concrete layer secured between these girder webs. Conventionally, ordinary concrete, that is, concrete mixed with gravel and having sufficiently high strength and an appropriate coarse grain ratio, has been used as the concrete layer.

In order to improve the strength characteristics of such a concrete composite panel, there is a structure in which the above-mentioned concrete layer is composed of a spherical steel fiber concrete layer and a surrounding ordinary concrete layer. In manufacturing such a concrete composite panel, as shown in FIG. 1, a spherical steel fiber concrete layer 1 is placed between a pair of steel plates (not shown in FIG. 1),
A method of pouring an ordinary concrete layer 2 around it is adopted. The steel fiber concrete layer 1 has spacer rods 3 in the radial direction or in the longitudinal and lateral directions to ensure an appropriate distance between itself and the pair of steel plates and the girder web interposed between the steel plates. However, according to this method, at the bottom of the steel fiber concrete layer 1,
Ordinarily, voids 4 are created due to sinking of the concrete layer 2 or floating air bubbles. This void 4 not only reduces the adhesion between the ordinary concrete layer 2 and the steel fiber concrete layer 1, but also becomes a weak point in the entire concrete layer. In Figure 1, 5 is the ordinary concrete pouring surface, 6 is the ordinary concrete 2
This is a curve representing the state of subsidence.

In order to solve the inconvenience caused by the occurrence of voids 4, as shown in Fig. 2, the ordinary concrete layer 7 is poured in several layers, and each time the concrete layer 7 is appropriately vibrated with a vibrator 7. Vibration is applied again approximately one hour after coarse air bubbles in the concrete layer 2 are expelled and the normal concrete layer 2 has almost completed settling. By implementing this method, the problem with the formation of voids 4 is largely solved if the vibrations are transmitted over the entire thickness of the concrete layer.

As methods for applying vibration to the ordinary concrete layer 2, there are two methods: applying vibration from the inside using a rod-shaped vibrator, and applying vibration from the outside using a formwork vibrator. In the case of the Sandermanch type hybrid structure, a rod-shaped vibrator cannot be used because no one can enter inside the panel frame 8. Furthermore, since the rod-shaped vibrator must be moved every 30 to 50 cm, it is difficult to operate it within the panel frame 8 containing the spherical steel fiber concrete layer 1. On the other hand, the formwork vibrator 7 is installed on the upper surface of the panel frame 8 with the panel frame 8 placed horizontally as shown in FIG. Therefore, sufficient vibration is not transmitted to the concrete layer 2, and it can be said that there is no effect at all. In addition, the range where sufficient vibration is transmitted is the range l from the vibration generating surface (upper surface of the panel frame), that is, l = 30
~50 cm, it is not possible to exert a vibration effect to the bottom of the ordinary concrete layer 2. On the other hand, if the vibrator 7 is operated for a long time, it is difficult to This will cause material separation at the end of the process, resulting in a decrease in quality. In Figure 2, the total panel thickness L is 150
It is about cm.

The present invention has been made in view of the above, and embodiments thereof will be described below with reference to FIGS. 3 and 4.

10 is a panel frame placed horizontally. The panel frame 10 is constructed by reinforcing a pair of opposing steel plates 11, 11 with girder webs 12 interposed and fixed between them at equal intervals. These girder webs 12 have an opening 13 in the center in the height direction for a certain purpose, and have steel plates 11,1
A notch hole 14 is provided at a suitable location at the joint with 1. Further, a girder web 15 having no opening is provided around the panel frame 10, and the girder web 15 isolates the inside of the panel frame 10 from the outside. on the other hand,
Each girder web 12 inside the panel frame 10
A spherical steel fiber concrete layer 16 is pre-placed between the two. Spacer rods 17A and 17B are planted in the steel fiber concrete layer 16 in the vertical and horizontal directions, and the steel plate 1 is connected by the vertical spacer rods 17A.
1, 11 and steel fiber concrete layer 1
6 is maintained as required. The lateral spacer rods 17B are interconnected between adjacent steel fiber concrete layers 16 by connectors 18 through the openings 13 in the girder web 12. Various types of connectors, such as couplers and sockets, can be used as the connector 18, and in that case, the spacer rod 17 can be used as necessary.
The end of B is threaded. Steel fiber concrete layer connection body 1 constructed in this way
Connecting rods 20A and 20B are provided at the starting and ending ends of the girder web 15, which do not have the above-mentioned openings, respectively.
Connected via B. Connection rod 20A, 20
Between B and the girder web 15 is a seal flange 2
2A, 22B or a bellows rubber 23 as shown in FIG. The starting end connecting rod 20A is connected to the shaft 24A of the vibrator 24 via a joint 25, and the terminal connecting rod 20A is connected to the shaft 24A of the vibrator 24 via a joint 25.
0B is connected to the fixed member 26 via a flexible plate 27 and a joint 28. The terminal connection rod 20B is
It may be connected to another vibrator having the same cycle as the vibrator 24. On the other hand, a concrete transport pipe 29 is connected to the girder web 15 which does not have an opening at one end of the panel frame 10, and the girder web 1 which does not have an opening at the other end.
An air vent pipe 30 is connected to 5. In the above process, the vibrator 24 is activated to vibrate the steel fiber connector 19 every time the ordinary concrete 31 is poured into the panel frame 10 through the concrete transport pipe 29. In this way, normal concrete is uniformly cast inside the panel frame 10 through the opening 13 of the girder web 12, and the air inside the panel frame 10 is discharged through the notch hole 14 of the girder web 12 and the air vent pipe. It is discharged through 30. The poured ordinary concrete 31 is sufficiently compacted as all the steel fiber concrete layers 16 vibrate together. The vibration of the steel fiber concrete layer connection body 19 and the pouring of ordinary concrete may be carried out simultaneously or alternately and intermittently. After completion of pouring,
Wait for the normal concrete layer to harden and connect joints 25, 2.
8, and concrete transport pipe 29,
Remove the air vent pipe 30.

As is clear from the above explanation, according to the present invention, poured ordinary concrete can be sufficiently compacted, and at that time, material separation of the concrete layer and the generation of voids at the bottom of the steel fiber concrete layer are avoided. This makes it possible to provide high quality concrete composite panels.

[Brief explanation of the drawing]

FIGS. 1 and 2 are explanatory diagrams of a conventional example, and FIGS. 3 and 4 are explanatory diagrams of an embodiment of the present invention. 10... Panel frame, 11... Steel plate, 12, 15
... Girder web, 13 ... Opening, 14 ... Notch hole, 16 ... Spherical steel fiber concrete layer, 17A, 17B ... Spacer rod, 1
8, 21A, 21B...Connection tool, 19...Steel fiber concrete layer connection body, 20A, 2
0B...Connection rod, 24...Vibrator, 2
9...Concrete transport pipe, 30...Air vent pipe, 31...Ordinary concrete.

Claims (1)

[Claims] 1. A method for manufacturing a concrete composite panel having a plurality of spherical steel fiber concrete layers between a pair of opposing steel plates and a normal concrete layer surrounding them, the method comprising: a spherical steel fiber concrete layer between the pair of steel plates; The spherical steel fiber concrete layers are placed horizontally in a state where they are arranged, and the spherical steel fiber concrete layers are connected to each other via their spacer rods, and the spherical steel fiber concrete layer connection body is vibrated, and normal concrete is applied between the pair of steel plates. 1. A method for manufacturing a concrete composite panel, comprising: casting.