JPH022745Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a wave-dissipating levee constructed by assembling blocks.

Note that the term "wave-dissipating levee" here also includes a quay.

[Conventional technology]

Conventionally, wave-dissipating quays or wave-dissipating banks have been constructed for the purpose of absorbing reflected waves or reducing wave force by attenuating the energy of incident waves.

In recent years, from the viewpoint of ease of construction, a method of constructing the above-mentioned breakwaters using blocks has been developed and is currently in use.

As an example, as shown in FIG.
There is a block in which a through hole 5 is provided at the lower part of the connecting wall 1 that connects the rear wall 4 and the rear wall 4.

[Problem that the invention attempts to solve]

However, if the water level in the water retarding section formed between the connecting walls 1 reaches the vicinity of the upper slab 2, the water retarding section becomes an independent room due to the connecting wall, and inside the water retarding section, the rise in the water level causes the lower part to The through hole 5 is blocked by water, so that
The air in the retarding section has no place to escape and is compressed to high pressure, which acts on the upper slab 2 as a powerful impulsive uplift force, causing damage to the upper slab 2 and eliminating the wave-dissipating effect. Was.

In addition, like the seawall described in Japanese Patent Publication No. 49-45489, ventilation holes are formed in the L-shaped parapet placed on the top concrete block for breakwater.
There are also known devices that allow highly compressed air to escape from the vent hole, but in this case, the air blown up from the vent hole above the seawall is of high pressure, so in some cases it may not be carried over the seawall. There was a problem in that there was a risk of blowing away stored items or workers, pedestrians, etc. on the seawall.

The present invention provides a wave-dissipating levee structure that can absorb the impulsive uplift pressure caused by the rise in water level, exhibit sufficient wave-dissipating effects, and safely release compressed air at high pressure. With the goal.

[Means and effects for solving the problem] In the present invention, a plurality of blocks formed by connecting a front wall and a rear wall arranged parallel to each other by a connecting wall orthogonal to both walls are arranged in a horizontal row. In the wave-dissipating levee, which is arranged side by side and stacked vertically in a staggered manner to form a retarding section between the connecting walls of the blocks, the wave-dissipating levee is placed on the topmost block among the multiple blocks. At least the uppermost block has a notch in the upper part of its connecting wall that forms an upper opening that interconnects the upper parts of the adjacent water retarding parts. By doing so, compressed air is diffused laterally to prevent damage to the upper slab and to prevent danger to workers on the breakwater.

[Embodiments] Examples of the present invention will be described below with reference to the drawings.

FIG. 2 shows a block for constructing a wave-dissipating levee according to the present invention, and is particularly used as the top block of the wave-dissipating levee.

1, 1' are connecting walls that connect the front walls 3, 3' and the rear walls 4, 4', respectively; 5, 5' are through holes; 6,
6' are notches 6a, 6 at the upper part of the connecting walls 1, 1'.
The upper opening is formed by a', 2 is the upper slab, A is the first stage block, and B is the second stage block. Note that the upper slab 2 closes off the uppermost block (first block A) from above to prevent the highly compressed air from escaping upward.

As shown, the upper openings 6, 6' are connected to the connecting walls 1,
It is formed by cutting out the upper part of 1'. The upper openings 6 and 6' allow the upper parts of the rooms in the water retarding part to communicate with each other, even when the water level in the water retarding part formed between the connecting walls 1 reaches near the upper slab 2. , the local compressed air caused by the rising water level can freely diffuse laterally to prevent the build-up of enormous pressure.

In addition, in the figure, 14 represents the wave height when the water level rises,
15 represents the wave height when the water level falls.

Furthermore, FIG. 3 is a perspective view of the block, and in the same figure, 5a is an opening formed on both sides of the front wall 3, and as will be described later, by combining with the opening 5a of an adjacent block, the opening 5a becomes transparent. The hole 5 is formed (see FIG. 5).

Further, 7 is a vertical hole formed in the rear wall 4, and 8
Symbols a and 8b are semicircular vertical grooves formed at both ends of the rear wall 4, which, when combined with the adjacent vertical grooves 8a and 8b, form a vertical hole for connecting blocks similar to the vertical hole 7. It is.

Furthermore, 9a and 9a' are protrusions for eliminating block misalignment during stacking and improving stackability.
Numerals 9b and 9b' are fitting grooves for the stack projections 9a and 9a'.

FIGS. 4a and 4b show plan views of each stage when the blocks are arranged on a horizontal plane, and the width of each block is shown as C. The top row shown in figure a is
Blocks are lined up horizontally in the order shown as 10, 11, 12, . . . . The center line of the next block shown in Figure b is different from the center line of the top block.
The difference is 2, resulting in staggered stacking, and
Therefore, as shown in FIG. 5, through holes 5 are formed in the front wall 3 in a staggered pattern.

In addition, 13 is a water retarding part.

The rear wall 4 of each block has a vertical hole 7 on the center line.
However, there are also semicircular vertical grooves 8a and 8b on the side of this block.
In a block having such a vertical hole 7 and semicircular vertical grooves 8a, 8b, the fourth
As is clear in the figure, a circular connecting hole 8 is formed by the vertical hole 7 of the uppermost block 11 and the semicircular longitudinal grooves 8a', 8b' of the second-stage blocks 10', 11'. ' are exactly overlapped and aligned in the vertical direction, penetrating the rear wall 4.

What is particularly important is that, for example, the vertical hole 7 of the uppermost block 11 is a circular connecting hole 8 formed by the semicircular vertical grooves 8a' and 8b' of the next blocks 10' and 11'. ', and the top block 10, 1
The circular connecting hole 8 formed by the semicircular vertical grooves 8a and 8b of block 1 overlaps with the vertical hole 7' of the next block 10'.

Also, the blocks from the next stage onwards are similar to the above,
The vertical hole 7 of one block in a certain stage has the property of overlapping and matching with the circular connecting hole formed by the semicircular vertical grooves of two adjacent blocks above and below it.

In this embodiment, the vertical holes 7, 7' and the connecting holes 8, 8' are circular in shape, but they may be in any shape, such as a rectangular shape or an elliptical shape, and the blocks can be piled up. There is no particular restriction as long as they overlap and match each other.

The vertical holes 7, 7' and the connecting hole 8 configured in this way,
If chestnut stone, concrete, or reinforced concrete is placed in the hole 8', a vertical column will be formed in each hole, and once the concrete hardens, each column will become a rigid body that vertically penetrates the rear wall 4 of the wave-dissipating bank. Become a pillar.

In this way, all the blocks are structurally tightened and integrated not only in the vertical direction but also in the horizontal (lateral) direction by the vertical pillars, forming a solid integrated structure that can withstand strong waves. It can exhibit great resistance against force, earth pressure, and earthquake force.

[Effect of idea]

As described above, in the present invention, in a wave-dissipating levee in which an upper slab is placed on the uppermost block to block the uppermost block from above, the upper part of the connecting wall of the uppermost block is cut out, and the upper Since the openings are formed, air can communicate with each other in the water retarding parts, and even if the water level rises, the air can be sequentially released to the laterally adjacent water retarding parts through the upper openings. This prevents the air from being compressed, and prevents the occurrence of a shockingly large amount of pressure due to the compression. This prevents the block, including the upper slab, from being damaged, and also allows the compressed air to flow to the side. Since the high-pressure air is allowed to escape in the opposite direction, high-pressure air is not blown upward from the wave-dissipating levee, resulting in the safety of goods, workers, etc. on the wave-dissipating levee.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of a conventional wave-dissipating levee, Fig. 2 is a longitudinal sectional view of the wave-dissipating levee of the present invention, Fig. 3 is a perspective view of a block used in constructing the wave-dissipating levee, and Fig. 4 a. , b is a plan view of each stage when the blocks are arranged on a horizontal plane,
FIG. 5 is an explanatory front view. 1, 1': Connecting wall, 2: Upper slab, 3, 3':
Front wall, 4, 4': Rear wall, 5, 5': Through hole, 6,
6': Upper opening, 6a, 6a': Notch, 7, 7':
Vertical hole, 8, 8': connecting hole, 8a, 8b: semicircular vertical groove,
9a, 9b': Projection, 9b, 9b': Fitting groove, 1
0, 11, 12: block, 10', 11', 1
2': Block.

Claims (1)

[Scope of utility model registration request] A block is formed by connecting a front wall and a rear wall that are arranged parallel to each other with a connecting wall that is orthogonal to both walls.
In a wave-dissipating levee in which a plurality of blocks are arranged in parallel and stacked vertically in a staggered manner to form a retarding section between the connecting walls of the blocks, the wave-dissipating levee is located at the top of the plurality of blocks. At least the uppermost block has an upper slab placed on the block to close the block from above, and at least the uppermost block has an upper opening at the upper part of the connecting wall that interconnects the upper parts of the adjacent water retarding parts. A wave-dissipating levee characterized by having a notch that forms a wave-dissipating bank.