JPS584793Y2 - Prestressed concrete version - Google Patents

Description

[Detailed description of the invention] This invention relates to a prestressed tococycrete plate that is welded and joined on-site to form a structure. The purpose of the present invention is to provide a prestressed concrete slab suitable for constructing structures with improved strength continuity and drainage performance.

This type of prestressed concrete slab can be roughly divided into those without rib members and those with rib members.

As is clear from the structure of the prestressed concrete slab without rib members, it is easy to join the concrete slabs together, but the weight of the concrete slab is inferior to the prestressed concrete slab with rib members.

For example, when comparing the two under the conditions that they have the same plate size and the same strength, the weight of the former is about twice that of the latter, which is uneconomical.

Therefore, the thickness of the latter plate is approximately 4 or less than that of the former, and the number of PC steel wires for applying prestress to the concrete, the thickness of the steel frame, and the like are both greatly reduced, making it easier to manufacture and use the concrete plate. It is advantageous for

Fig. 1 shows a conventional concrete slab 1 of this type, and 2 is a prestressed concrete slab in which PC steel wires 3 are buried vertically and horizontally to provide prestress.
A bone member 4 for reinforcing the surface plate 2 is provided on the surface.

The outer end portion 4A of this bone member 4 is provided continuously and integrally with the peripheral portion 2A of the surface plate 2, and is buttoned.
A steel frame 5 is provided at the peripheral portion 2A and the outer end portion 4A of the frame member 4 for welding to the adjacent prestressed concrete slab 1 during construction of the structure.

This steel frame 5 has the peripheral part 2A of the face plate and the outer end part 4A of the bone member integrally and continuously formed as described above. Part 5B
are integrally formed.

However, when two prestressed concrete plates 1 having such a configuration are welded together on site, the steel frames 5 of two prestressed concrete plates 1 are butted against each other, or the ends of the steel frames 5 are joined together. Since welding is performed by overlapping the two, the weldable parts are limited to those that are exposed to the outside.

Therefore, in the case shown in FIG.
The portion 5C1 of the end steel frame 5B that is sandwiched by the peripheral steel frame 5A of the face plate 2 and the peripheral steel frame 5 of the face plate 2
It becomes impossible to weld the portion 5D formed between the upper frame and the lower frame of A, and a problem remains regarding continuity of strength.

Note that 6 is a drain hole formed between the face plate 2 and the bone member 4.

The present invention can improve the continuity of the strength and at the same time simplify the structure of the steel frame itself, and the embodiment thereof will be described below based on illustrative drawings.

In FIG. 2, numeral 7 is a prestressed concrete face plate having a peripheral steel frame 8 on all four sides, and a prestressed concrete steel wire interposed inside for applying prestress.

A lattice-shaped bone member 9 is protruded from one side of the face plate 7, and the outer end 9A of the bone member 9 is connected to the peripheral part 7 of the face plate 7.
It is provided at a location away from the peripheral steel frame 8 of A.

That is, the outer end portion 9A of the bone member 9 is formed into an elbow plate shape that is bent diagonally with respect to the main body portion 9B of the bone member 90.
An end steel frame 10 is provided at the outer end 9A.

This end steel frame 10 has a rectangular cylindrical shape, and its structure is extremely simple.

A drainage hole 11 is formed between the main body portion 9B of the bone member 90 which has been twisted and the face plate 7.

Furthermore, the gap 12 formed between the outer end 9A of the frame member 9 and the peripheral portion 7A of the face plate 7 functions as a drainage hole.

Although the bone members 9 have a lattice shape as described above, they are not limited to this, and of course may have a parallel structure.

FIG. 3 shows the case where the prestressed concrete slab 13 having the above-mentioned configuration is erected in the structure 14.
At the bottom 15 of the concrete slabs 13 are connected girder plates 16
6. When joining the partition wall plate 1T, use the prestressed concrete plate on the bottom plate 15 side. 1.3 End steel frame 1 of bone member 9
0 and prestressed concrete plate 13 on the partition wall plate 17 side
The end portions of the frame members 9 and the steel frame 10 are welded to each other around the entire circumference, and the steel frames 8, 8 around the face plate 7° 70 are further welded to each other.

The joint between the prestressed concrete slabs 13 on the broken bottom slab 15 is achieved by inserting elbow plate-shaped bone members 1 on both sides of the face slab 18.
They are joined via a girder plate 16 having a diameter of 9.

That is, the end steel frame 20 of the frame member 19 of the girder plate 16 and the end steel frame 10 of the frame member 9 of the prestressed concrete slab 34 are welded together on their entire circumference, and the surface of the concrete slab 13 is welded together. The peripheral steel frame 8 of the plate 7 and the peripheral steel frame 21 of the face plate 18 of the girder plate 16 are welded together from three sides.

22 is a drainage hole formed between the joints.

According to the prestressed concrete plate 2 according to the present invention,
Because the surrounding steel frame of the prestressed concrete slab and the steel frame at the end of its aggregate are installed separately and separately, it is difficult to weld the prestressed concrete slabs together or the prestressed concrete slab and other joining members. When joining, the peripheral steel frame and the end steel frame can be individually welded around the entire circumference. This eliminates the problem of parts of the welding becoming unweldable, thus maintaining continuity in strength.

Furthermore, since the end steel frame of the frame member and the peripheral steel frame of the one-sided plate are constructed separately, the structure of these steel frames themselves can be simplified.

[Brief explanation of drawings]

Figure 1 is a perspective view of the main parts of a conventional prestressed concrete slab 1, Figure 2 is an overall perspective view of a prestressed concrete slab 13 according to the present invention, and Figure 3 is a building constructed using the same prestressed concrete slab 13. FIG. 7.18... Prestressed concrete surface slab, 8.21... Surrounding steel frame, 9,19...
...Bone member, 9A... Outer end of bone member 9, 10
, 20... End steel frame, 12, 22...
- Gap (drainage hole).

Claims (1)

[Scope of utility model registration request] A bone member for reinforcing the face plate is provided protrudingly on one side of a prestressed concrete face plate having a peripheral steel frame on the outer periphery, and the outer end of the bone member is connected to the peripheral steel frame of the face plate. 1. A prestressed concrete slab, characterized in that the prestressed concrete slab is provided at a distance from the frame member, and an end steel frame is provided at the outer end of the bone member.