JPS6310245B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing hollow spherical blocks used for wave-dissipating or fish reef applications.

[Conventional technology and problems]

For example, as described in Japanese Patent Publication No. 51-6075, this type of hollow spherical block is manufactured by joining upper and lower hollow hemispheres made of reinforced concrete at their opening surfaces. Two methods are known: one is to cross-weld the reinforcing bars exposed in the recess of the hemisphere and fill it with mortar, and the other is to install flanges protruding around the openings of both the upper and lower hemispheres and fasten both flanges. It is being

However, the former method has the drawbacks of poor workability for welding the bolt across the reinforcing bars in the recess, and the degree of connection between the two hemispheres is insufficient. Because of the flange, the original characteristics of the spherical block, namely low wave resistance and high wave-dissipating effect, are lost, and the installation direction is limited, and the wave-dissipating effect varies depending on the direction. There is a disadvantage that it occurs.

The object of the present invention is to provide a method for producing hollow spherical blocks that does not have these drawbacks.

[Means for solving problems]

The structure of the present invention that achieves the above object will be explained based on embodiments as follows.

1. A plurality of vault holes 4 are opened perpendicularly to the end surface 3 of the hemispherical wall through which a plurality of wave-dissipating cylindrical holes 2 are penetrated, and an extension line 7 thereof is formed.
A hemispherical body 1 is molded in such a manner that it passes through the outside of the wall. The vault holes 4 of the two hemispheres 1 and 1 are made to communicate with each other, and the end surfaces 3 of the bottom portions are joined together, and the vault 5 is inserted into the communicating vault hole 4 along the extension line 7, and the vault is used to connect both hemispheres. Tighten your body 1,1.

As the second hemisphere 1, in addition to the above first configuration,
The inner surface of the wave-dissipating cylindrical hole 2 is shaped to expand outward, and the vault hole 4 is
Cylindrical holes 2 arranged in a row along the end surface 3 of the hem portion
A hemisphere in which the extension line 7 passes through the outer end opening 2' of the cylindrical hole 2 between each inner surface of two or more cylindrical holes 2 equally spaced from each other and the end surface 3 of the hem portion. Mold body 1. The vault 5 is inserted into the communicating vault hole 4 of the two hemispheres 1, 1 along the extension line 7 and through the outer end opening 2' of the cylindrical hole 2, whereby both the hemispheres 1, 1 Tighten.

[Effect]

Place the two hemispheres 1, 1 into each other's vault holes 4.
The desired hollow spherical block A can be easily produced by connecting and joining the bolts, and then simply inserting the vault 5 into the vault hole 4 and tightening it.

〔Example〕

A shows a hollow spherical block obtained by the manufacturing method of the present invention, which is made by joining and tightening two hemispheres 1.

The hemisphere 1 is formed by penetrating a hemispherical wall having a required wall thickness with a plurality of vault holes 4 similar to a plurality of wave-dissipating cylindrical holes 2.

One wave-dissipating cylindrical hole 2 is provided at the top of the hemispherical wall, and six holes are provided at equal intervals along the end surface 3 of the bottom portion between the top and the bottom portion. The inner surface of each wave-dissipating cylindrical hole 2 widens as it reaches the outer end opening 2' side from the inner end opening 2'' side, and the center line of each cylindrical hole 2 is such that the end surface 3 of the skirt portion is surrounded by It passes through the center 0 of the opening of the hemisphere 1 to be formed.

A total of three vault holes 4 are provided between the inner surface of every other three holes 2 among the six wave-dissipating cylindrical holes 2 along the end surface 3 of the hem part and the end surface 3. ing. Moreover, the vault hole 4 opens perpendicularly to the end surface 3, and the extension line 7 of the vault hole 4 passes through the outer end opening 2' of the cylindrical hole 2 and also passes outside the hemispherical wall. We are in a relationship where we do

One of the hemispheres 1 with the above configuration is installed with the end face 3 of the hem part facing upward, and the other hemisphere 1 is placed on top of it.
Polymerize with the end face 3 of the hem portion facing downward. At this time, three vault holes 4 each in the upper and lower hemispheres 1, 1
communicate.

Next, the vault 5 is inserted into the communicating vault hole 4 from above or below along the extension line 7, and nuts 5' are screwed and tightened at both ends.

As a result, the upper and lower hemispheres 1, 1 are tied together to produce a hollow spherical block A, and even when a rotational force is applied to the hemispheres 1, 1 and a shearing force is applied, the vault 5 is Even if a force acts on it, it can sufficiently resist it, and therefore the upper and lower hemispheres 1,
It is obvious that 1 should be integrated.

6 is the inner end of the vault hole 4, that is, the cylindrical hole 2
A nut 5' is positioned in a recess formed on the inner surface of the recess, and after the nut 5' is screwed and tightened, mortar or the like is filled. Note that this recess 6 is not provided when the wall thickness is thin, and in that case, the tip of the vault 5 and the nut 5' screwed therein may be exposed inside the cylindrical hole 2.

When tightening the upper and lower hemispheres 1, 1 with the vault 5, it is desirable to make the force applied to them uniform. It's okay to be hot.

Reference numeral 8 indicates a large annular reinforcing bar buried near the end face 3 of the hem portion along with it; 9 indicates a small annular reinforcing bar embedded near the cylindrical hole 2 at the top and along it; 10
is an arcuate reinforcing bar that connects both large and small annular reinforcing bars 8 and 9 between the six cylindrical holes 2 described above. However, these reinforcing bars are not buried because they may be unnecessary when the hemisphere is small and thick.

〔Effect of the invention〕

As is clear from the above, according to the manufacturing method of the present invention, two hemispheres are joined by communicating their vault holes, and the vault is easily inserted into the vault hole and tightened. Thus, the desired hollow spherical block A can be easily produced. In other words, the hollow spherical block is a complete sphere, and the installation direction is limited, such as one made by joining flanged hemispheres.
Furthermore, there is no difference in the wave-dissipating effect depending on the direction, and the inherent characteristics of the spherical block, such as low wave resistance and large wave-dissipating effect, can be fully exhibited.

In addition, unlike the conventional manufacturing method in which reinforcing bars embedded in two hemispheres are connected by welding or the like to form a sphere, this method eliminates the need for exposing reinforcing bars, welding, and backfilling the welded part, and As long as the vault is sufficiently tightened, both hemispheres can be firmly integrated and a durable spherical block can be easily obtained.

In the above, the vault hole opens perpendicularly to the end face of the bottom part of the hemispherical wall, and its extension line passes through the outside of the wall, so the two hemispheres are connected to each other's vault hole. As long as they are joined in communication, the vault can be easily constructed without the walls of the hemisphere itself getting in the way, even if the length of the vault is longer than the diameter of the wave-dissipating cylindrical hole. , which can be inserted into the communicating vault hole and tightly tightened both hemispheres, and there are no particular restrictions on the length of the vault, the method of insertion, the method of tightening, etc.

In addition to the above, the second claim of the manufacturing method of the present invention provides that, in addition to the above, the vault holes are arranged in rows along the end surface of the bottom portion of the hemisphere, and the inner surface of the wave-dissipating cylindrical hole and the end surface are arranged at equal intervals. Since both ends of the vault are located within the wave-dissipating cylindrical hole or on its wall surface, and are not exposed to the outer surface of the hemispherical wall, there is no risk of foreign objects such as waves colliding with each other. There is no risk of damage due to straining and therefore no loosening of the bond between the hemispheres.

[Brief explanation of the drawing]

The drawings are for explaining the manufacturing method of the present invention; Fig. 1 is a front view of the manufactured spherical block, Fig. 2 is a plan view of the same, and Fig. 3 is a sectional view taken along the line A--A of Fig. 2. be. 2... Cylindrical hole for wave dissipation, 4... Vault hole, 3...
...Hem portion end face, 7... Extension line, 1... Hemisphere, 5
……vault.

Claims (1)

[Scope of Claims] 1. A plurality of vault holes are opened perpendicularly to the end surface of the hem portion of the hemispherical wall through which a plurality of wave-dissipating cylindrical holes are penetrated, and the extension line thereof is A hemisphere is formed so as to pass through the outside of the wall, and the vault holes of the two hemispheres are made to communicate with each other, and the end faces of the hem portions are joined, and the vault is inserted into the communicated vault hole. A method for manufacturing a hollow spherical block characterized by tightening both hemispheres with. 2 A skirt portion of a hemispherical wall in which a plurality of wave-dissipating cylindrical holes are penetrated, the inner surface of which expands as it reaches from the inner end opening side to the outer end opening side, and along the end surface of the skirt portion. A vault hole is opened perpendicularly to the end surface between the inner surface of two or more cylindrical holes equidistantly spaced from each other among the cylindrical holes arranged in a row, and the extension line thereof is the same as that of the cylinder. A plurality of hemispheres are formed so as to pass through the outer end opening of the hole and the outside of the wall, and the two hemispheres are made to communicate with each other through the vault holes, and the end surfaces of the bottom portions are joined. A method for manufacturing a hollow spherical block, characterized in that both hemispheres are tightened by a vault inserted from the outside of the wall along the extension line into the communicating vault hole.