JPH0437210B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a structure in which the overlapping shape is curved or curved in a culvert, culvert, pipe, common ditch, sewer, underground passage, open channel, retaining wall, storage tank, or other appropriate structure. The present invention relates to a connecting block and a method for connecting the same, which are used when constructing a connecting block including connecting blocks and connecting members. This type of block and its connection method are disclosed in Patent No. 908394 (Special Publications Showa).
No. 52-17567) and Patent No. 1067798 (Special Publication No. 1987-
No. 2498), but the present invention has the advantage of eliminating the need for alignment of these connecting members, while adding an improvement that expands the range of use of the invention.

An example in which the present invention is implemented in a box culvert will be described. The connecting block 1 is made of concrete or other material that can be hardened and formed, and an insertion hole 3 through which a connecting member 2 made of a steel rod, steel rod, wire strand, etc. is inserted is provided between both end faces 4 and 5 of the block 1. It penetrates at the corner 6. Packing 7 for leak prevention, such as covering the sponge rubber surface with vulcanized rubber, and small elastic pieces made of elastic material that have higher hardness than Packing 7 but are thinner and limit the amount of compression of Packing 7. 8 is attached to the end faces 4 and 5 as appropriate.

The above is the same for the ordinary connection block 31 shown in FIG. 2, but in the connection block 1 of the present invention,
If the box-shaped connecting part 12 is embedded in the block body 1' on the inner surface 10 of the corner part 6, which is the side part 9 of the block 1, the insertion hole 3 will pass through the corner part 6. Therefore, the insertion hole 3 is cut at the corresponding location, and the insertion holes 3, 3 are opened to the box-shaped connecting component 12.

The box-shaped connecting component 12 embedded here shows an example in which through-holes 15 and 16 are formed in both end face plates 13 and 14 in the direction of the insertion hole 3 as means for attaching the connecting members 2 and 2, respectively. .

The description will continue with reference to the embodiments shown in FIGS. 5-7. The box-shaped connecting component 12 has resilient elastic plates 17 attached to both end plates 13 and 14 in the direction of the insertion hole 3, and extends from the bottom to both sides of the box-shaped connecting component 12 and the elastic plates 17. An edge cutting layer 17 made of oil, paper, etc. is formed and embedded in the block 1.

And each through hole 1 of both end face plates 13 and 14
5, 16 are elastic plates 17, 17 in the insertion holes 3, 3.
It passes through and communicates with the The elastic plate 17 is made of natural rubber, urethane rubber, or the like. The end of the connecting member 2 inserted into the box-shaped connecting part 12 is tightened with a nut 19 with an anchor plate 21 and a washer 18 interposed. Grout injection hole 2
0 was drilled. In this way, the box-shaped connecting part 12 is exposed on the surface of the block, but is not buried.

Since the box-shaped connecting part 12 is embedded in the block body in this manner, it is convenient to mold this part as an inner mold of the block body.

Normally, the load on the box-shaped connecting part 12 by the connecting member 2 is considered to be within the range of distortion of the connecting part 12, but if we consider that a large load may occur even locally, the box-shaped connecting part 12 is It was considered that the cutting layer 22 was interposed and was displaced relative to the block body.

It is also possible to consider that the connecting component 12 fills the absence of the connecting member 2 at the location where the connecting member 2 does not exist and exhibits fastening strength by being connected to the connecting member. Steel and other materials with excellent strength can be used to create shapes that are difficult to deform.

Next, the connection method will be described. As shown in FIG. 4, a normal connection block 31 is used as needed, and as shown by arrow A, at least the connection proceeding side end is connected to the connection of the present invention. The connecting blocks 1 are arranged and connected in an overlapping manner from the connecting base end side to the connecting advancing side, and the connecting members 2 are connected to the end plates 13 and 14 by sequentially tightening nuts.

Embedded recess 1 of connecting block 1 in each group
The connecting member 2 is locked to the connecting block 1 by elastically holding the box-shaped connecting member 12 in the connecting member 1 and tightening it to a desired degree.

In order to attach the end portion 23 of the connecting member 2 on the connecting progress side to the end plate 13 on the connecting base end side of the connecting member 12, it is convenient to do as follows. After temporarily attaching the nut 19, as shown in FIG. It is threadedly connected to the section 23, and the proximal end is tightened with a nut 28 with a pressing tool 27 such as a hydraulic jack interposed on the end surface 5. Then, the pressing tool 27 is operated to apply a desired tension to the connecting member 2, the nut 19 is twisted, and the nut 19 is finally installed, and the pressing tool 27, the connector 26, and the tension rod 25 are removed. Figure 9 shows the fully installed state as described above, and the dotted line indicates the connecting block 3 next to the connecting progress side.
1 is polymerized and connected.

In the invention of Japanese Patent Publication No. 55-2498 mentioned above, there is a problem in that the pressure of tightening the connecting block is received within the recessed portion, and tensile stress is generated in the vicinity thereof.

Normally, the stress is within the allowable range so there is no problem, but in the case of large blocks, the connecting members that overlap and connect them become thicker, and the tension increases.
The tensile stress of the concrete may exceed the allowable stress level.

Particularly, in the case of important structures such as public ditches or cases of high design importance, it would be advantageous to be able to apply compressive stress to the concrete without generating tensile stress even in the vicinity of connected parts.

In both cases, whether it is a large block in the former case or a common groove in the latter case, the connecting blocks that are connected by polymerization are tightened together, so compressive stress is generated as a reaction force between the connecting blocks. As a result, compressive stress is also generated within the connecting block, so not only is there no risk of tensile stress occurring in the concrete near the buried recess, but compressive stress will also occur.

Therefore, the effect of expanding the scope of use of the inventions of Japanese Patent Publication No. 52-17567 and Japanese Patent Publication No. 55-2498 listed at the beginning is significant.

In the connecting block 1 of the present invention, the connecting members 2 and 2' attached to both end face plates 13 and 14 of the box-shaped connecting part 12 elastically and tightly support the connecting part 12 in the embedded recess 11. At the same time, the connecting method of the present invention can be carried out by locking the connecting members 2, 2' to the connecting blocks 1, 31 via a frame portion (not shown) or the like.

In the connection method of the present invention, the tension support by the connection member 2 attached to both end face plates 13 and 14 of the connection component 12 is locked to the connection blocks 1 and 31, so that the connection is achieved. Since the connecting part 12 is elastically tensioned in the implantation recess 11, no stress due to the connection is generated in the implantation recess 11.

The present invention enables easy molding of a block used as an inner mold in an appropriate structure using a connecting block and its connecting method, and is particularly effective in polymerizing and connecting large blocks.

[Brief explanation of drawings]

Fig. 1 shows an embodiment of the block of the present invention, Fig. 2 shows a normal block in this example as a perspective view, Fig. 3 is a front view of these blocks, and Fig. 4 shows the connection method of the present invention. FIG. 2 is a side view of one embodiment. 5, 6, and 7 are a cross-sectional view, a longitudinal sectional view, and a front view of the main parts of the block of the present invention, respectively, and FIG. 8 is an explanation of one means of tightening in the connection method of the present invention. figure,
FIG. 9 is a front view showing the main parts in a connected state.

Claims (1)

[Scope of Claims] 1. The insertion hole of the connection member of the connection block is cut, and the box-shaped connection component has resilient elastic plates piled up on both end face plates in the direction of the insertion hole in the side portion of the block. At the same time, an edge cutting layer extending from the bottom surface to both side surfaces is formed and embedded in the block, and the through holes of the both end face plates are communicated with the insertion hole. . 2. In the connecting block of the present invention as set forth in claim 1, when the connecting block is inserted through the connecting member for overlapping connection, the connecting member attached to both end face plates of the box-shaped connecting part A method for connecting connecting blocks, characterized in that a box-shaped connecting component is elastically supported in tension with respect to an embedded recess, and a connecting member is locked to the connecting block.