JPH0826531B2 - Wave-dissipating block - Google Patents

Description

FIELD OF THE INVENTION The present invention relates to wave-dissipating blocks.

As a conventional breakwater body such as a breakwater, for example, as disclosed in JP-A-63-70706, an opening on one end side is located outside the bay and an opening on the other end side is located inside the bay. It is known that a plurality of pipe-shaped wave-dissipating blocks located at are arranged vertically and horizontally. Here, the wave-dissipating block is generally one in which a wave-dissipating pipe having an irregular cross-section made of cast iron or the like is embedded inside a rectangular column-shaped concrete block. According to such a configuration, the waves traveling from the open sea side enter the wave-dissipating tube, and when passing through the wave-dissipating tube, are attenuated due to a change in the passage cross-sectional area in the wave-dissipating tube. Become.

However, in such a conventional configuration, since the wave-dissipating pipe is embedded inside the concrete block,
It has the drawback of being expensive to manufacture. On the other hand, if a hole is formed in the concrete block itself without using a wave-dissipating pipe, a core or the like is newly required for that purpose, and it is difficult to reduce the cost.

Therefore, an object of the present invention is to solve such a problem and to provide a wave-dissipating block that does not require a tube body to be embedded inside and does not require use of a core or the like.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention is capable of constructing a bank by arranging a plurality of upper, lower, left, and right, and a wave-dissipating block having a rectangular outer shell from a front end surface of the block. A front vertical hole that is formed in the front-rear direction and constitutes a sudden compression rapid expansion portion,
Following this front vertical hole, a central vertical hole that is formed in the front-back direction of the block and forms a wide water-retaining portion, and a horizontal hole that connects the water-retaining portions of the blocks that are adjacent to each other on the left and right The structure has a pair of recesses that can be formed between the two.

Further, the present invention is configured to have a communication hole that allows the water retaining portions formed vertically adjacent to each other to communicate with each other.

Further, the present invention is configured such that the recess can form a rear vertical hole extending from the water retaining portion to the rear end surface of the block between the vertically adjacent blocks.

Action According to such a configuration, by stacking the blocks vertically, holes in the vertical direction and the horizontal direction are formed by the recesses of the blocks. This hole is formed only by the concave portion of the block without using a cast iron pipe or the like. Further, it suffices to form a recess in the block, and it is not necessary to form a wave-eliminating hole having a complicated shape. Therefore, the manufacturing cost of the wave breaking block becomes low.

By providing a communication hole for communicating between the water-retaining portions formed vertically adjacent to each other, the waves in the hole can be vertically diffused, and effective wave-dissipation is performed.

By allowing the rear vertical hole to be formed by the concave portion, the wave in the hole is emitted as a flow toward the area behind the wave-eliminating block.

Embodiment FIG. 1 to FIG. 4 show a wave breaking block 1 of the first embodiment of the present invention, and FIG. 5 shows a dam body constructed by using a plurality of the wave breaking blocks 1.

As shown in FIGS. 1 to 4, the wave-dissipating block 1 is composed of a concrete body having a rectangular outer shell, and concave portions 2A are respectively formed on the upper surface and the lower surface when the concrete body is installed horizontally. , 2B are formed. A plurality of fitting recesses 3 are formed at the ridges between the upper surface and the side surface of the wave-dissipating block 1, and at the ridge portions between the side surface and the lower surface thereof, the lower side when the wave-dissipating blocks 1 are stacked vertically. A plurality of fitting convex portions 4 that fit in the fitting concave portions 3 of the wave-dissipating block 1 are formed.

By arranging a plurality of such wave-dissipating blocks 1 vertically and horizontally, a bank body as shown in FIG. 5 is constructed. Reference numeral 5 is a concrete board base portion, and 6 is a concrete board mounting portion for forming the upper surface of the dam body.

As shown in FIG. 5 and FIG. 1, between the vertically adjacent wave-dissipating blocks 1, a recess 2B on the lower surface side of the wave-dissipating block on the upper side and a recess 2B on the upper surface side of the wave-dissipating block on the lower side are provided. The wave-dissipating hole 7 is formed by 2A. This wave breaking hole 7 is the surface of the dam body on the ocean side, that is, the wave breaking block 1.
A front vertical hole 9 formed in the front-rear direction of the block from the front end face 8 of the block, a central vertical hole 10 formed in the same direction following the front vertical hole 9, and a left-right direction intersecting with the central vertical hole 10. And a lateral hole 11 formed in.

The front vertical hole 9 has a circular cross section, and its cross-sectional area rapidly decreases and then rapidly increases.
have. The central vertical hole 10 is also formed in a circular cross section to form a wide water retaining portion 13 having a large diameter.
The central vertical hole 10 has an inclined wall surface 14 in a portion facing the horizontal hole 11, and the innermost portion thereof is closed by a rear end surface 15. The horizontal hole 11 has a rectangular cross section and is formed so as to penetrate between both side surfaces of the wave-dissipating block 1, so that the water-retaining portions 13 of the wave-dissipating blocks 1 that are adjacent to each other on the right and left sides communicate with each other.

In this way, the wave-dissipating block 1 has holes 9, 10, 11 of the wave-dissipating hole 7.
Since it is only necessary to form the concave portions 2A and 2B capable of forming the ridges on the upper and lower outer surfaces of the rectangular concrete body, and only the fitting concave portion 3 and the convex portion 4 are added thereto, it is divided into upper and lower portions. It can be manufactured very easily and inexpensively only by using a mold or the like.

The levee body shown in FIG. 5 can be used for both revetment and separation, but the wave-dissipating blocks 1 stacked one above the other fit into each other and the projections 4 fit into the recesses 3, resulting in a strong connection. Moreover, the occurrence of lateral deviation is prevented.

When a wave hits the bank, a part of this wave enters the hole 9 from the opening of the front vertical hole 9 of the wave breaking hole 7 and propagates along the sudden expansion / contraction part 12 and the water retaining part 13. Therefore, the waves are repeatedly collided with each other or against the wall, and the energy is attenuated and disappeared. Further, when it collides with the inclined wall surface 14 of the water retaining portion 13 and is diffused in the direction of the lateral hole 11, it is also attenuated and canceled.

FIG. 6 shows a wave breaking block 1 according to the second embodiment of the present invention. In this wave-dissipating block 1, upper and lower recesses 2A, 2B
A communication hole 16 having a circular cross-section is formed to allow the two to communicate with each other.

With such a structure, vertically adjacent water-retaining portions 13 formed by the wave-dissipating blocks 1 that are vertically stacked communicate with each other. Therefore, the waves that collide with the inclined wall surface 14 will also spread in the vertical direction,
More effectively attenuated and dissipated.

FIG. 7 shows a wave breaking block 1 according to a third embodiment of the present invention. In this wave-dissipating block 1, the shapes of the recesses 2A, 2B are determined so that the wave-dissipating hole 7 formed by vertically adjacent wave-dissipating blocks 1 has a rear vertical hole 17. The rear vertical hole 17 is formed in a circular cross section, and is formed in the front-back direction extending from the water retaining portion 13 to the inward sea side surface of the dam body, that is, the rear end surface of the wave-eliminating block 1.

According to such a configuration, the water retaining section 13 is passed through the sudden contraction and expansion section 12.
Since the waves that have entered are repeatedly waved or repeatedly collided with the wall, and particularly when they collide with the inclined wall surface 14 and are diffused in the lateral direction, the waves are extinguished and simultaneously entrain air, so that Higher oxygen concentration.
Then, since the water with the high oxygen concentration flows out from the rear vertical hole 17 into the inner water area surrounded by the bank, not only the wave disappearing but also the exchange of water in the inner and outer water areas and The effect of aeration can also be expected.

FIG. 8 shows a wave breaking block 1 according to a fourth embodiment of the present invention. This wave-dissipating block 1 has a structure in which a communication hole 16 similar to that in FIG. 6 is formed in the wave-dissipating block similar to that shown in FIG. Therefore, it is possible to expect both the operational effects obtained from those shown in FIGS. 6 and 7.

EFFECTS OF THE INVENTION As described above, according to the present invention, it is possible to form a wave-dissipating hole only by the recess formed on the outer surface of the wave-dissipating block without using a cast iron pipe or the like, and yet the wave-dissipating block Since it is not necessary to form a wave breaking hole having a complicated shape, it is possible to easily and inexpensively obtain a wave breaking block.

By providing a communication hole for communicating the water-retaining portions formed vertically adjacent to each other, the waves in the hole are diffused up and down, and more effective wave-dissipation becomes possible.

Further, by making it possible to form the rear vertical hole by the recess,
Not only can the waves be dissipated, but the effects of water exchange and aeration between the inner and outer water areas that are partitioned by the levee can be obtained.

[Brief description of drawings]

1 to 4 are a perspective view, a plan view, a front view and a side view of a wave breaking block according to a first embodiment of the present invention, and FIG. 5 uses the wave breaking block shown in FIGS. 1 to 4. 6 and 8 are perspective views of the breakwater block of the second to fourth embodiments of the present invention. 1 ... Wave-dissipating block, 2A, 2B ... Recess, 7 ... Wave-dissipating hole,
9 ... Front vertical hole, 10 ... Central vertical hole, 11 ... Horizontal hole, 12 ...
Sudden reduction / expansion part, 13 …… water retaining part, 16 …… communication hole, 17 …… rear vertical hole.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-50-69825 (JP, A) Actually opened 57-147323 (JP, U) Actually opened 50-147433 (JP, U)

Claims (3)

[Claims] 1. A wave-dissipating block which can be constructed by arranging a plurality of blocks vertically and horizontally and which has a rectangular outer shape, and which is formed from the front end face of the block in the front-rear direction and is rapidly compressed. A front vertical hole that constitutes the expanded portion, a central vertical hole that follows the front vertical hole and that is formed in the front-rear direction of the block and that forms a wide water-retaining portion, and a horizontal hole that connects the water-retaining portions of the blocks that adjoin left and right. A wave-dissipating block having a pair of recesses capable of forming a hole between vertically adjacent blocks. 2. The wave-dissipating block according to claim 1, further comprising a communication hole that allows the water-retaining portions formed vertically adjacent to each other to communicate with each other. 3. The eraser according to claim 1 or 2, wherein the concave portion is capable of forming a rear vertical hole extending from the water retaining portion toward the rear end surface of the block between the vertically adjacent blocks. Wave block.