JP4808503B2 - Seismic joint structure of floor slab - Google Patents

Description

  The present invention relates to a seismic joint structure for floor slabs in which the facing floor slabs are connected with a gap in a parallel structure.

  Conventionally, when the structures are arranged in parallel, the floor slabs facing each other may be connected to use the floor slabs as a passage. As such a floor slab connection, for example, as shown in FIG. 4, a gap 15 is provided between the floor slabs 13, 14, and the floor slabs 13, 14 are slid to the upper part of the opposite side surfaces of the floor slabs 13, 14. There is a seismic joint structure in which a stop angle 24 is provided, a stainless steel plate 22 is bridged between the upper surfaces of the floor slabs 13, 14, and sealing 23 is applied to both ends of the stainless steel plate 22 for waterproofing.

In addition, a surface plate that is fixed only on one side is arranged at the upper part of the gap, and a clearance is provided between the side edge part of the surface plate and the upper surface rising edge part of the slab to absorb the expansion and contraction of the gap. In order to further reduce this clearance, the surface plate is not fixed to the upper surface of the slab, but a bolt extending downward is provided on the surface plate, and a restriction plate is provided on the lower surface of the slab. A structure is also conceivable in which a spring is disposed between them to bias the surface plate downward (see, for example, Patent Document 1).
JP-A-9-13524

  However, in the former structure, since the stainless steel plate is bridged between the upper surfaces of the floor slabs, a step is generated between the upper surface of the stainless steel plates and the upper surface of the floor slab, which hinders traffic. In the latter structure, there is no step, but clearance is required, which creates a groove on the floor and hinders traffic, and when the floor slab is outside the structure, rainwater, etc. There was a risk of entering the gap.

  Further, in both the above structures, when the lower part of the floor slab to be connected is also used as a passage, the gap between the floor slabs, bolts, springs, etc. appear on the ceiling surface, so the appearance of the connection part is poor. There was a problem of becoming.

  An object of the present invention is to connect floor slabs facing each other in parallel to each other with a simple earthquake-resistant joint structure, which eliminates the obstacle to passage between floor slabs, prevents water from entering the gaps, and It is to improve the appearance as seen from below the connecting portion.

  In order to solve the above problems, in the invention described in claim 1, the floor slabs 13, 14 of the parallel structures 11, 12 are connected with a gap 15 therebetween as shown in FIGS. The floor plate slab earthquake-resistant joint structure 1 includes a slide plate 2 having one end 2 a fixed to one floor slab 13 and the other end 2 b free from the other floor slab 14. A cushion material 3 disposed so as to cover the lower side and supported by the slide plate 2 to absorb the displacement of the floor slabs 13 and 14 is disposed in the gap 15, and the water to the gap 15 is placed on the cushion material 3. The waterproof layer 4 that prevents the intrusion of the slab is provided so that the upper surface of the waterproof layer 4 is substantially the same as the upper surface of the floor slabs 13 and 14.

  In this way, the gap 15 is formed between the floor slabs 13 and 14 facing each other, the slide plate 2 is disposed so as to cover the lower portion of the gap 15, and the cushion material 3 supported on the slide plate 2 is provided. It arrange | positions in the clearance gap 15. FIG. One end 2a of the slide plate 2 is fixed to one floor slab 13, the other end 2b is free with respect to the other floor slab 14, and the cushion material 3 is displaced by the earthquake of the floor slabs 13, 14. By absorbing the slabs, the floor slabs 13 and 14 are not damaged, and the connection between the floor slabs 13 and 14 can be made earthquake resistant. Then, by providing the waterproof layer 4 on the cushion material 3 so as to be almost the same height as the upper surfaces of the floor slabs 13 and 14, water intrusion into the gap 15 is prevented without impairing the earthquake resistance, and the floor A function as a passage without a step or a groove on the surface can be retained. Furthermore, even when the connecting portions of the floor slabs 13 and 14 are viewed from below or from the outside, the appearance of the slide plate 2 covering the bottom of the gap 15 appears, so that the appearance can be improved.

  According to a second aspect of the present invention, in the seismic joint structure for a floor slab according to the first aspect, for example, as shown in FIG. 3, the other end 2 b of the slide plate 2 is placed on the lower surface of the other floor slab 13. It is characterized by touching.

  Thus, since the other end 2b of the slide plate 2 is in contact with the lower surface of the other floor slab 13, there is no gap between the slide plate 2 and the lower surface of the floor slab 13, and the appearance is further improved. Can do.

  According to the present invention, when floor slabs facing each other in parallel structures are connected with a gap therebetween, one end is fixed to one floor slab and the other end is free with respect to the other floor slab. Since the plate is arranged so as to cover the lower part of the gap and the cushion material supported by the slide plate and absorbing the displacement of the floor slab is arranged in the gap, the floor slab can be connected with a simple earthquake-resistant structure. . A waterproof layer that prevents water from entering the gap is provided on the cushion material so that its upper surface is almost the same height as the upper surface of the floor slab. Can function as no passage. Furthermore, since the slide plate appears below the gap, the appearance of the slab from below can be improved. Moreover, if the other end side of the slide plate is in contact with the lower surface of the other floor slab, there is no gap between the slide plate and the lower surface of the floor slab, and the appearance can be further improved.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 1 and 2, structures 11 and 12 which are drainage water tanks of a reinforced concrete structure are installed in parallel. One structure 11 is an existing structure and the other structure 12 is a new structure. Floor slabs 13, 14 that are outside the structure project from the structures 11, 12, and the floor slabs 13, 14 face each other with a predetermined gap 15.

  These floor slabs 13 and 14 are used as inspection passages between the structures 11 and 12. Moreover, under the floor slabs 13 and 14, soil concrete 16 is provided and serves as an inspection passage. In the present embodiment, the floor slabs 13 and 14 have a thickness of 200 mm, and the gap 15 has a width of 50 mm.

  The seismic joint structure 1 of the floor slabs 13 and 14 in the present embodiment is an application of the present invention to the connection between the floor slabs 13 and 14. As shown in FIG. 3, in this earthquake-resistant joint structure 1, the slide plate 2 in which one end side 2 a is fixed to one floor slab 13 and the other end side 2 b is free with respect to the other floor slab 14 has a gap 15. It is arrange | positioned so that the lower part of may be covered.

  The slide plate 2 is a long stainless steel plate having a width wider than the gap 15 between the floor slabs 13 and 14 and has a thickness of 6 mm and a width of 200 mm. The slide plate 2 is fixed so that one end side 2a is 50 mm wide and overlaps the lower surface of one floor slab 13 in the width direction, and the other end side 2b is 100 mm wide on the lower surface of the other floor slab 14. They touch and overlap.

  The one end 2a of the slide plate 2 is fixed by an anchor bolt 5 or the like installed on the lower surface of one floor slab 13 at a predetermined interval. In the present embodiment, chemical anchors having a bolt diameter of 12 mm are driven at intervals of 500 mm.

  When the other end 2b of the slide plate 2 contacts the lower surface of the other floor slabs 13, 14, it is desirable that the upper surface of the other end 2b of the slide plate 2 slide smoothly. Therefore, for example, it is conceivable to use a decorative material as a formwork material when placing concrete in the construction of the other floor slab 13.

  As shown in FIG. 1, the slide plate 2 is configured by welding a plurality of stainless steel plates by welding their end portions over the extending direction of the gap 15 between the floor slabs 13 and 14. And the diagonal member 2c is provided in the edge part of the longitudinal direction of the slide board 2 without attaching to the floor slabs 13 and 14 for reinforcement. The material of the diagonal member 2c can be the same as that of the slide plate 2.

  On the slide plate 2, a cushion material 3 supported by the slide plate 2 and absorbing the displacement of the floor slabs 13 and 14 is filled in the gap 15 and arranged. As the cushion material 3, for example, polystyrene foam or the like is conceivable, and has a strength capable of withstanding a load due to traffic.

  Further, a waterproof layer 4 that prevents water from entering the gap 15 is provided on the cushion material 3 so that the upper surface thereof is substantially the same height as the upper surfaces of the floor slabs 13 and 14. As the waterproof layer 4, for example, a hard urethane waterproof is conceivable, and can follow the displacement of the floor slabs 13 and 14.

  According to the present embodiment, one end 2a of the slide plate 2 slides with respect to the lower surface of one floor slab 13, and the cushion material 3 supported on the slide plate 2 is in an earthquake of the floor slabs 13 and 14. Therefore, the floor slabs 13 and 14 are not damaged and a joint structure having earthquake resistance can be obtained. And by providing the waterproof layer 4 on the cushion material 3 so as to be substantially the same height as the upper surfaces of the floor slabs 13, 14, in the passage across the floor slabs 13, 14 without damaging the earthquake resistance, It is possible to prevent water from entering the gap 15 and eliminate steps or grooves on the floor surface.

  Further, even when the connecting portion of the floor slabs 13 and 14 is viewed from below or outside, the slide plate 2 is in contact with the lower surfaces of both floor slabs 13 and 14 and covers the lower portion of the gap 15. Only 2 appears on the ceiling surface and the appearance can be improved.

  In the above embodiment, the floor slab is applied to the exterior of the structure. However, the present invention is not limited to this and may be applied to the interior of the structure. . In addition, the thickness of the floor slab, the width of the gap between the floor slabs is arbitrary, and other specific details such as a slide plate, cushioning material, waterproof layer, etc. can be changed as appropriate. is there.

It is a whole top view which shows the earthquake-resistant joint structure of the floor slab of one Embodiment to which this invention is applied. It is AA sectional drawing which shows the earthquake-resistant joint structure of FIG. It is the expanded sectional view which expanded the X section which is the principal part of FIG. It is sectional drawing which shows the earthquake-resistant joint structure of the conventional floor slab.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Earthquake-resistant joint structure 2 Slide board 2a One end side 2b The other end side 2c Diagonal material 3 Cushion material 4 Waterproof layer 5 Anchor bolt 11, 12 Structure 13, 14 Floor slab 15 Crevice 16 Soil concrete

Claims (2)

A floor slab earthquake-resistant joint structure where floor slabs facing each other in parallel are connected with a gap,
A slide plate whose one end is fixed to one floor slab and the other end is free with respect to the other floor slab is arranged so as to cover the lower part of the gap,
A cushioning material supported by the slide plate and absorbing the displacement of the floor slab is disposed in the gap,
A floor slab seismic joint structure characterized in that a waterproof layer for preventing water from entering into the gap is provided on the cushion material so that the upper surface thereof is substantially the same height as the upper surface of the floor slab.   The seismic joint structure for a floor slab according to claim 1, wherein the other end of the slide plate is in contact with the lower surface of the other floor slab.

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