JPH0649607Y2 - Wave-dissipating block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a wave-dissipating block that absorbs waves in the gulf and the like.

Conventional Technology Tetrapod (registered trademark) is generally used as a conventional wave-dissipating block. This is because the four protrusions are 120
It consists of star-shaped concrete blocks that form an angle of degrees, and a plurality of these blocks are piled up to construct a dam body. However, in this type of block, since the dam body is constructed by simply stacking a plurality of these star-shaped blocks, it is difficult to make the shape of the dam body regular, and strong waves are generated. In the case of a collision, there is a problem that the blocks may be displaced from each other and the shape of the bank may be disturbed. As a solution to these problems,
As shown in FIGS. 5 and 6, a square columnar block 21 having a through hole 22 for wave-dissipation formed therein is considered. In this block 21, a convex portion 23 is formed in at least a central portion of one side surface, and a convex portion of another block 21 is formed in a central portion of a side surface of the block 21 opposite to the one side surface. A recess 24 into which the portion 23 can be fitted is formed. The blocks 21 are arranged laterally from the outside of the bay to the inside of the bay, and a plurality of blocks 21 are stacked while fitting the convex portions 23 and the concave portions 24 of the adjacent blocks 21 to construct a bank body. According to this wave-eliminating block, the waves propagating from the outside of the bay to the inside of the bay are extinguished by passing through the through hole 22,
By stacking multiple 21s, a bank with a regular shape can be easily constructed. In this case, the bank is constructed by fitting the convex portions 23 and the concave portions 24 of the adjacent blocks 21 into each other, so that the blocks 21 are strongly connected to each other and even when strong waves collide. There is no deviation between blocks 21.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in this type of block 21, since the bottom surface of the recessed portion 24 provided in the central portion of one side surface and the through hole 22 are close to each other and the distance D therebetween is small, this portion Is thin, and the strength as a bank construction block may be insufficient.

The present invention solves the above-mentioned problems, and it is possible to easily construct a dam body with a regular shape and to prevent displacement even when a strong wave collides, and to have a sufficient strength as a dam construction block. It is intended to provide wave blocks.

Means for Solving the Problems In order to solve the above problems, the present invention is arranged in a wave transmission direction from the outer side of a bay to the inner side of a bay, and a plurality of prismatic columns that can be stacked in a state where adjacent side surfaces are in close contact with each other. Inside the block, a through-hole for wave-dissipation having a substantially circular cross-section and penetrating along the wave transmission direction from the outside of the bay to the inside of the bay is formed, and is located on the outer peripheral side of the through-hole of the block. On at least one side surface, a convex portion is formed at a corner portion in a plane cross section orthogonal to the wave transmission direction, and the other side surface of the prism of the block is located on the opposite side to the one side surface on which the convex portion is formed. At the corners of the, concave portions into which the convex portions of other blocks can be fitted are formed.

Action With the above configuration, the waves are extinguished by passing through the through holes, and by stacking the blocks while fitting the convex portions and the concave portions of the adjacent blocks, it is easy to construct a regular shaped bank body, Due to the fitting of the convex portion and the concave portion of the adjacent blocks to each other, the blocks are firmly connected to each other, and the blocks are not displaced from each other. Moreover, since the convex portion and the concave portion are formed at the side surface corner portions of the block prism, the distance between the concave portion and the through hole is larger than that when the convex portion and the concave portion are formed at the central portion of the side surface of the block prism. As a result, this portion becomes thick and the strength is improved.

Embodiment FIG. 1 and FIG. 2 show a wave breaking block 1 according to the present invention.
FIG. Here, 2 is a block that is arranged in the wave transmission direction from the outside of the bay to the inside of the bay, and is composed of a concrete material in the shape of a quadrangular prism, and has four side surfaces 3 formed on the outer surface in a direction along the wave transmission direction. 4,5,6
Is appearing. A convex portion 7 is formed at each of a corner portion of the side surface 5 intersecting with the side surface 4 and a corner portion of the side surface 5 intersecting with the side surface 6, and the side surface located on the opposite side of the side surface 5 on which the convex portion 7 is formed. In FIG. 3, recesses 8 are formed at the corners of intersection with the side surface 4 and the corners of the side surface 6, respectively. When a plurality of blocks 2 are stacked, the convex portions 7 and the concave portions 8 of the adjacent blocks 2 are configured to fit each other. Inside the block 2, a cast iron pipe 9 is embedded along the length direction of the block 2, and the cast iron pipe 9 forms a through hole 10 having a circular passage cross section. Then, in this through hole 10, there are narrow passage portions 12a, 12b having a narrower flow passage cross-sectional area than the openings 11a, 11b, and a water retarding passage 13 having a wider flow passage cross-sectional area than the narrow passage portions 12a, 12b. The flow path cross-sectional area is narrowed and expanded as a whole, and is formed in a shape that changes. As shown in Fig. 3, the wave-dissipating block 1 is constructed by stacking a plurality of side surfaces 3, 4, 5, 6 of adjacent blocks 2 in close contact with each other, and is a breakwater as a dam body.
15 are composed.

When constructing the breakwater 15, a plurality of wave-dissipating blocks 1 are piled up on the seabed or a foundation portion previously provided on the seabed. At this time, the wave-dissipating blocks 1 are stacked by fitting the convex portions 7 and the concave portions 8 to each other, and they can be firmly connected to each other, so that the wave-dissipating blocks 1 can be connected to each other even when strong waves collide. There is no deviation. Moreover, the convex portion 7
Since the concave portion 8 and the concave portion 8 are formed at the corners intersecting the two side surfaces of the block 1, the distance d between the concave portion 8 and the through hole 10 becomes large
This portion becomes thick and has sufficient strength as the wave breaking block 1, and the breakwater 15 having excellent strength can be constructed.

As shown in FIG. 4, when a wave advances to the breakwater 15 from the outside 16 of the bay, this wave passes through the opening 11a and the through hole 1
0 inside, the collision with the inner surface of the through hole 10 and the through hole 10
Energy is absorbed and dissipated by the change in passage cross-section inside the.

As shown in FIGS. 1 to 3, in the present embodiment, the convex portion 7 and the concave portion 8 are formed in the vertical direction, but they may be formed in the block width direction or the diagonal direction. Alternatively, the blocks may be diagonally arranged so as to have a diamond shape when viewed from the front. Further, although the cast iron pipe 9 is embedded in the above description, the through hole 10 may be simply provided without embedding the pipe. Further, in the above description, the block 2 formed in the shape of a quadrangular prism has been illustrated, but it may be formed in another prismatic column such as a hexagonal column or an octagonal column.

As described above, according to the present invention, a plurality of pillars are stacked in a state where the side surfaces of adjacent ones are in close contact with each other, and in a prismatic block having a through-hole for wave breaking having a substantially circular passage cross section, Since the parts and recesses are formed at the side corners of the prism of the block, even if the diameter of the through hole is increased to improve the temporary reflectivity against waves and the exchangeability of water inside and outside the bay,
It is possible to obtain a wave-dissipating block having sufficient strength as a block for constructing a bank body, etc., since the distance between the concave portion and the through hole is kept large and the thin portion is eliminated.

[Brief description of drawings]

1 is a sectional view and a front view showing a wave breaking block according to an embodiment of the present invention, and FIG. 2 is a side view showing the wave breaking block.
3 and 4 are partially cutaway front views of a breakwater constructed with the wave breaking blocks shown in FIGS. 1 and 2, and FIG. 5 is a partially cutaway front view showing a conventional wave breaking block. FIG. 6 is a sectional view showing the conventional wave-dissipating block. 1 ... Wave-dissipating block, 2 ... Block, 3,4,5,6 ... Side, 7
… Projections, 8… Recesses, 10… Through holes, 15… Breakwaters.

Claims (1)

[Scope of utility model registration request] 1. A bay having a substantially circular passage cross-section inside a prismatic block which is arranged in a wave transmission direction from the outer side of the bay to the inner side of the bay and which can be stacked in a state where adjacent side surfaces are in close contact with each other. A through-hole for wave-dissipation is formed penetrating along the wave transmission direction from the outside to the inside of the bay, and at least one side surface of the block located on the outer peripheral side of the through-hole is orthogonal to the wave transmission direction. A convex portion is formed at a corner portion in a plane cross section, and a convex portion of another block is fitted into a corner portion of the other side surface of the prism, which is located on the opposite side of the side surface on which the convex portion is formed. A wave-dissipating block characterized by forming possible recesses.