JPH0333772Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a floor slab connection structure for an assembly road.

(Prior art) Tough prestressed concrete slabs are widely used as floor slabs for assembly roads, and such concrete slabs have multiple holes drilled on both ends of the slab to reduce weight and strengthen the slab. A tubular hole is provided.

Therefore, in order to construct an assembly road using such perforated concrete slabs, the perforated ends of the perforated concrete slabs are built over horizontal beams provided at intervals, leaving a gap between the perforated ends of the perforated concrete slabs. The projecting fixtures are fixed to the cross beams by welding, the gaps are filled with a joint material such as mortar, and the floor slabs are connected on the cross beams.

(Problem to be solved by the invention) However, in the conventional deck connecting structure as described above, the perforated concrete deck is completely fixed to the cross beams using fixing fittings, and the opening of the deck is difficult. Since the holes at the ends of the holes are completely blocked by a joint material such as mortar filled in the gap, stress caused by expansion and contraction of the floor slab due to temperature changes cannot be effectively alleviated.

Therefore, cracks are likely to occur on the surface of the slab,
Another disadvantage is that water such as rainwater that has entered the holes in the floor slab collects in the holes and freezes, causing the floor slab to crack.

(Means for Solving the Problems) The present invention provides a floor slab connection structure for assembly roads that eliminates the above-mentioned drawbacks. The present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes horizontal beams made of H-section steel provided at intervals, and a core rod 4 made of round steel is fixed onto this cross beam 1 by welding. In addition to welding, the core rod 4 may be fixed by screwing into the cross beam. 2 is a perforated prestressed concrete floor slab, and this floor slab 2 is provided with tubular holes 5 on both end faces thereof. The holes 5 on both end faces of the floor slab 2 may be cut out in a semicircular shape as shown in the figure, or may not be cut out.

The perforated concrete 2 is used in an amount corresponding to the cross beam 2, and the perforated end of each floor slab 2 is
The cross beams 1 are placed facing each other, leaving a gap 3.
A core rod 4 is placed approximately in the center of the gap 3.
It is made so that it will come. Hole 5 in each floor slab 2
A wire or rope 6 is inserted through the , one end 61 of which is formed into a loop shape and hooked onto one of the core rods 4 and locked, and the other end 62 is formed into a threaded rod shape.
It is passed through the horizontal hole 41 of the other core rod 4 and tightened and locked with a nut 63.

In the above example, a wire or rope 6 with a length corresponding to one span is inserted into the hole 5 of each concrete slab 2, and both ends 61 and 62 of this wire or rope 6 are locked to the core rod 4. However, as shown in FIG.
The wire or rope 6 may be pressed around the core rod 4 by a retaining ring 9 and thereby locked to the core rod 4.

The number of core rods 4 corresponding to the holes 5 in one concrete slab 2 is fixed on the cross beam 1, and wires or ropes 6 are inserted into each of the holes 5 in the slab, one by one. The core rods 4 may be fixed to the rods 4, and the core rods 4 are fixed on the cross beams 1 one by one for each concrete slab 2, so that each concrete slab 2
Insert only one wire or rope 6 per
It may be fixed to the core rod 4.

Furthermore, in FIGS. 1 and 2, a cover plate 7 is fixed onto the core rod 4 with bolts 71.
This cover plate 7 is attached to the gap 3 while leaving the upper part of the gap 3.
The upper part of the gap 3 formed on the cover plate 7 is filled with a joint material 8 such as mortar. Note that 81 is a caulking agent.

In the above example, a wall is provided around the periphery of the cover plate 7 to form the cover plate 7 into a container shape, to prevent the joint material 8 such as mortar from flowing downward, and to connect the wall of the cover plate 7 and the floor slab 2. The gap between the end surface and the end surface is sealed with a caulking agent 81, but as shown in FIG. ,
The upper part of the gap 3 formed thereon may be filled with a joint material 8 such as mortar without using the caulking agent 81, with the gap being as small as possible. Thus, the assembly road slab connection structure of the present invention is constructed.

(Operation and effect of the invention) As described above, in the present invention, the open end of the perforated concrete slab is spanned over the cross beam leaving a gap, and the core rod is placed over the cross beam in the gap. is fixed, and a wire or rope is passed through the hole in the floor slab, and this wire or rope is locked to the core rod in the gap, and the floor slab is well fixed to the cross beam by this wire or rope. This prevents the floor slab from moving.

In addition, the wires or ropes are only inserted through the holes in the floor slab and are not fixed to the floor slab, so even if the floor slab expands and contracts due to temperature changes, the floor slab can expand and contract freely and absorb stress. Good relaxation is achieved, and the occurrence of cracks in the slab can be significantly reduced.

Further, a cover plate is fixed on the core rod to close the gap while leaving the upper part of the gap, and the upper part of the gap is filled with a joint material such as mortar. As a result, joint material such as mortar is prevented from flowing into the lower part of the gap and into the holes of the floor slab, and the holes of the floor slab are not blocked by the joint material. Therefore, even if water such as rainwater enters the holes in the slab through minute cracks in the slab, the water flows out from the holes in the slab to the lower part of the gap and accumulates inside the holes in the slab. This prevents floor slabs from cracking due to freezing of accumulated water.

In addition, with this invention, the core rod can be welded to the cross beam in advance without welding in the gap between two slabs as in the past, and then it can be fixed with only bolts and nuts. The fixing work can be carried out by narrowing the gap between the floor slabs, and the width of the cross beam can be made narrower accordingly, so that manufacturing costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway vertical cross-sectional view showing an example of the present invention, Fig. 2 is a plan view partially showing the main part of Fig. 1 in horizontal cross-section, and Fig. 3 is a partially cutaway longitudinal cross-sectional view showing an example of the present invention. FIG. 1...Horizontal beam, 2...Perforated concrete floor slab,
3... Gap, 4... Core rod, 5... Hole in the floor slab, 6
... wire or rope, 7 ... cover plate, 8 ... joint material.

Claims (1)

[Scope of utility model registration request] The open end of the perforated concrete floor slab 2 is spanned over the cross beams 1 provided at intervals, leaving a gap 3, and a core rod 4 is fixed on the cross beam in the gap. A wire or rope 6 is inserted through the hole 5 in the floor slab, the wire or rope is locked to a core rod in the gap, and a cover plate 7 is placed on the core rod to close the gap while leaving the upper part of the gap. A floor slab connection structure for an assembly road, characterized in that it is fixed and the upper part of the gap is filled with a joint material 8 such as mortar.