JPS5817912B2 - Buried piping connection method in precast slab - Google Patents

Description

[Detailed Description of the Invention] This invention provides a precast slab in which piping such as hot water pipes, water supply pipes, drainage pipes, and heating/cooling pipes are integrally buried in concrete, mortar, gypsum, asbestos, or other plate material. The present invention relates to a method for easily connecting the piping.

Conventionally, proposals have been made to construct roads, tracks, etc. by laying precast concrete slabs with hot water pipes for snow melting buried in concrete in cold regions, but in any of the above cases, it is difficult to connect the pipes. To connect, usually a flange is provided at each end of the pipe that protrudes from the base slab, and both flanges are tightened with bolts.
Therefore, a large amount of space is required between the slabs, and if there are a large number of pipes, it is time-consuming to connect each pipe at the same time, and extremely high precision is required in the amount of protrusion and spacing between each pipe, and the above-mentioned After the piping is connected, the voids need to be filled with material of the same material as the slab and hardened, which takes a lot of time and effort, and has the disadvantage of increasing construction costs.

The present invention solves the above-mentioned conventional drawbacks, and when connecting precast slabs made of concrete, mortar, gypsum, asbestos, or other slabs in which pipes are integrally buried in parallel, the connection edge of one slab has a A parallel or inclined upward connecting surface is provided on the surface of the slab, the pipe end of the pipe buried in the slab is opened to the upward connecting surface, and the connecting edge of the other slab is connected to the upward connecting surface. Opposing downward connecting surfaces are provided, and the pipe ends of the pipes buried in the other slab are opened on the downward connecting surface in correspondence with the piping openings in the one slab, and the upper connecting surface and the downward connecting surface are opened. This invention provides a method for connecting buried piping in precast slabs, which is characterized in that each slab is fixedly connected with bolts or the like by interposing a packing between the two, and at the same time, the buried piping is also connected. The explanation will be based on drawings showing.

Fig. 1 is a partially vertical side view, and Fig. 2 is an exploded perspective view of the connection part. The pipes 4 and 5 for the various purposes mentioned above are buried in advance.

The connecting edge of one of the slabs 1 is provided with an upward connecting surface 6 parallel to the surface of the slab 1 with a notch in the upper part, and the pipe 4 buried in the slab 1 has its end bent and the pipe end It is open to the upward connecting surface 6.

The connecting edge of the other slab 2 is provided with a downward connecting surface 7 having a notch shape on the lower side and facing the above-mentioned upward connecting surface 6.
The pipe 5 buried in the pipe 5 has its end bent and opens into the downward connection surface 7, and its opening position corresponds to the opening position of the one pipe 4.

In order to connect the slabs 1 and 2, a through hole and a bolt insertion hole made of rubber or other material are formed between the upper connecting surface 6 and the lower connecting surface 7, and correspond to the openings of the piping 4 and 5. A bolt 9 embedded in one slab 1 and protruding from the upward connecting surface 6 is inserted into the other slab 2.
Insert the nut 11 into the bolt hole 10 provided on the connecting edge of the
It sticks to the surface.

In this case, if the bolts and nuts protrude from the slab surface and cause problems, they can be sunk nuts as shown in FIG.

Note that the bolts may be through bolts from the lower slab to the upper slab, or they may be tightened by embedding female threads in the lower slab and screwing stop bolts through the bolt holes in the upper slab. .

FIG. 3 shows another embodiment of the connection, in which the upper connecting surface 6 of the slab 1 and the opposing lower connecting surface 7 of the slab 2 are inclined at an angle α of approximately 45° with respect to the slab surface. It is a provision.

In this case, the ends of the pipes 4 and 5 do not need to be bent as in the previous embodiment, but are straight, and only the ends of the pipes have upper and lower connecting surfaces 6,
It may be provided at an angle according to 7.

The packing 8 and bolt fastenings 9, 10, and 11 are the same as in the previous embodiment.

Note that if the angle α is small, the edges of the slab will be easily chipped.
If the angle is too large, a step will be created on the surfaces of the slabs 1 and 2 due to port tightening, so a range of 30° to 60° is appropriate.

Figures 4 to 7 are schematic side views showing various examples of connection states of precast slabs connected in parallel. When connecting by placing the slabs from above, Figure 5 shows the connection by placing the other slab 2 on one slab 1, and then placing the other slab 2 on the step on the opposite side of the connection of slab 2. In this case, Fig. 6 shows a case in which the upper and lower connecting surfaces are inclined in the same manner as in the embodiment shown in Fig. 4, and Fig. 7 shows a case in which the slabs are placed one after another in the same way as in the case of Fig. 5 above. , in which the upper and lower connecting surfaces are provided at an angle, and FIG. 8 is a side view of the connecting portion of the combination type shown in FIGS. 4 and 6, as shown in the exploded perspective view of FIG. 9. The pipes 4 and 5 open into the inclined connection surfaces 6 and 7, and the fastening portion by the bolt 9 is parallel to the surface of the slab, so that any connection state may be used.

The present invention is constructed as described above, and at the same time when the precast slabs are connected, the respective piping openings to the upper and lower connecting surfaces provided parallel to or inclined to the slab surface are connected, and the packing interposed between the upper and lower connecting surfaces connects the precast slabs. Each pipe is kept watertight or airtight, and a slight error in the opening position of each pipe is tolerated, making it easy to manufacture press cast slabs and install on-site, which is extremely effective in shortening the construction period and reducing construction costs. .

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially longitudinal side view, FIG. 2 is an exploded perspective view of a connecting portion, FIG. 3 is a longitudinal side view of another embodiment of the connecting portion, and FIG. 4 is a partially longitudinal side view. 7 is a schematic side view showing various connection states of precast slabs connected in parallel, FIG. 8 is a side view of yet another embodiment of the connection portion, and FIG. 9 is an exploded perspective view of FIG. 8. 1.2.2' Nibre cast slab, 3: Plate material, 4.5
: Piping, 6: Upward connection surface, 7: Downward connection surface, 8: Packing, 9: Bolt, 10: Bolt hole, 11: Nut.

Claims (1)

[Claims] 1 When connecting precast slabs made of concrete, mortar, gypsum, asbestos, or other slab material 3 with pipes embedded in parallel, the connecting edge of one slab 1 may be parallel to or inclined to the surface of slab 1. upward connection surface 6
The pipe end of the pipe 4 buried in the slab 1 is opened to the upward connection surface 6, and the connection edge of the other slab 2 is provided with a
A downward connecting surface 7 is provided opposite to the upward connecting surface 6, and the pipe end of the pipe 5 buried in the slab 2 is opened to the downward connecting surface 7 in correspondence with the opening of the one pipe 4, and In a precast slab characterized in that a packing 8 is interposed between the facing connecting surface 6 and the downward connecting surface 7, and each slab 1.2 is fixed with a Pole 9.11 etc. to connect buried piping. Buried piping connection method.