JP4440954B2 - Wave-dissipating block - Google Patents

Description

  The present invention relates to a concrete wave-dissipating block that is disposed near a shore such as a harbor, a fishing port, a coast, and a river to construct a wave-dissipating structure.

  Conventionally, it has been known to construct a wave-dissipating structure by arranging wave-dissipating blocks near the shore in order to prevent waves coming from the open sea, etc. in fishing ports, coasts, rivers, etc., and to maintain a calm water surface. ing.

  The wave-dissipating block used to construct the wave-dissipating structure is a block having four legs extending radially from the center, and the axis of the leg in the wave-dissipating block A concrete wave-dissipating block constructed so as to coincide with the center of gravity of the block is also conventionally known (see, for example, Patent Document 1).

The wave-dissipating block described in Patent Document 1 includes four legs that have a tapered shape in which an outer peripheral surface is inclined and a cross-sectional area gradually decreases from a base end portion to a tip end portion. A structure is provided so as to extend radially from the central portion where the axes intersect each other at intervals of approximately 120 °.
Japanese Patent Laying-Open No. 2006-348572 (FIGS. 1 and 2).

  The invention described in Patent Document 1 described above is a structure having four legs extending radially from the center, and the energy of the wave is obtained except for the four legs extending radially from the center. There are no particular recesses or cavities for absorbing and maintaining the wave-dissipating effect. In addition, there are no depressions or cavities that form a habitat such as algae and seafood.

  Therefore, when constructing a wave-dissipating structure using the wave-dissipating block described in Patent Document 1, it is possible to expect a further sufficient wave-dissipating effect and to devise various habitats such as algae and seafood. I need it. For this reason, the construction work is troublesome, and it is necessary to install another means for creating a habitat environment such as algae and seafood, resulting in an increase in construction costs.

  Therefore, there is a technical problem to be solved in order to propose a wave-dissipating block that can further improve the wave-dissipating effect and can also contribute to a habitat environment such as algae and seafood. It aims at solving.

The present invention has been proposed to achieve the above object, and the invention according to claim 1 is a block having four legs extending radially from the center, wherein the legs of the block are provided. In the wave-dissipating block configured so that the body axis coincides with the center of gravity of the block,
Wherein among the four leg, three of the sites of four positions proximal end portion of the leg member is set each formed form a respective substantially flat, forming a recess in the symbolic flat surface Provide a wave-dissipating block.

  According to this configuration, a part of the water soul of the wave is absorbed by the recessed portion, and the water soul flowing out from the recessed portion collides with the water soul outside the recessed portion.

  In addition, when the concave portion is formed in a square shape, for example, a number of corner portions are formed, and seaweed is easily attached, and the bottom surface of the corner portions is a position recessed from the leg surface, and the impact of the wave is ease.

Invention of claim 2, wherein said recess is formed in the first recess consists of the second recess, the site first recess is adjacent to the proximal end of each leg in the upper Kiryaku plane The wave-dissipating block according to claim 1 , wherein the second recessed portion is formed by providing a stepped portion inside the first recessed portion.

  According to this configuration, the first concave portion (upper stage) is provided near the outer surface of the block, so that it is difficult for water to collect, but the second concave portion (lower stage) is provided on the inner side deeper than the first concave portion. As a result, water accumulates and a hidden area is formed, making it easier to capture spores such as seaweed.

According to a third aspect of the present invention, there is provided the wave-dissipating block according to the second aspect , wherein minute irregularities are provided on all or a part of the inner surfaces of the first and second recessed portions.

  According to this configuration, shells such as algae and abalone are easily attached to the bottom surface by the minute irregularities on the bottom surface.

The invention according to claim 4 is a block having four legs extending radially from the center, and the axis of the leg of the block is configured to coincide with the center of gravity of the block. In the wave-dissipating block,
A hollow reservoir formed at the center where the axes of the four legs intersect, and four sites where the base ends of the three legs of the four legs are assembled Each of which has a substantially flat surface and is formed with a recessed portion in the substantially flat surface, and includes four tubular connecting portions each communicating the inside of each of the four recessed portions and the inside of the storage portion. Provide a wave-dissipating block.

  According to this configuration, a part of the water soul of the wave is absorbed by the recessed portion, and the water soul flowing out from the recessed portion collides with the water soul outside the recessed portion.

  In addition, when a stormy weather wave reaches the storage part through the recessed part and the tubular connecting part, the water soul, which is a part of the wave, is abruptly contracted and expanded, resulting in energy loss. In particular, the water soul stored in the storage part is emitted with a phase difference from the reflected wave during pulling.

  Further, when the recessed portion is formed in a planar view, for example, a large number of corner portions are formed, and the bottom surface of the corner portion becomes a position recessed from the leg surface, so that the impact of the wave is reduced. In addition, when the water is calm, the hollow storage part becomes a spawning ground or habitat for fry and seafood.

According to a fifth aspect of the present invention, the concave portion includes a first concave portion and a second concave portion, and the first concave portion is formed in a portion adjacent to the base end portion of each leg in the substantially plane. 5. The wave-dissipating block according to claim 4 , wherein the second recessed portion is formed by providing a stepped portion inside the first recessed portion.

  According to this configuration, the first concave portion (upper stage) is provided near the outer surface of the block, so that it is difficult for water to collect, but the second concave portion (lower stage) is provided on the inner side deeper than the first concave portion. As a result, water can easily collect, and spores such as seaweed can be easily captured in the second recessed portion.

  The invention according to claim 1 can be expected to have an effect of promoting wave extinction by reducing wave energy due to a collision between the water soul flowing out from the recessed portion and the water soul outside the recessed portion.

  In addition, since the impact of the waves is mitigated in the deep part of the recessed part, it is possible to provide a suitable environment for inhabiting algae and seafood. For this reason, the means for forming a habitat for algae and seafood, which has been provided separately from the installation of the wave-dissipating block, is no longer necessary, and costs such as construction costs can be reduced.

  In the invention described in claim 2, since water is accumulated in the recessed second recessed portion, and spores such as seaweed are easily captured in the second recessed portion, in addition to the effect of the invention described in claim 1 In addition, the environment suitable for algae and seafood to live in is further improved.

  In the invention described in claim 3, since the minute unevenness of the bottom surface provided in the second recessed portion makes it easy for shellfish such as algae and abalone to adhere to the bottom surface, in addition to the effect of the invention of claim 2 In addition, the environment suitable for algae and seafood to live will be further improved.

  The invention according to claim 4 can be expected to have an effect of promoting wave extinction by reducing wave energy due to the collision between the water soul flowing out from the recessed portion and the water soul outside the recessed portion.

  Moreover, when the water soul, which is part of the waves, reaches the storage part through the recessed part and the tubular connecting part, the wave during stormy weather is abruptly contracted / expanded to cause energy loss and has the effect of quenching. can get. In particular, since the water soul stored in the storage part is released with a phase difference from the reflected wave during pulling, the wave-dissipating effect is further enhanced.

  Furthermore, since the impact of the waves is mitigated in the deep part of the recessed part, it is possible to provide a suitable environment for inhabiting algae and seafood. For this reason, the means for forming a habitat for algae and seafood, which has been provided separately from the installation of the wave-dissipating block, is no longer necessary, and costs such as construction costs can be reduced.

  In the invention described in claim 5, since water is accumulated in the recessed second recessed portion, and spores such as seaweed are easily captured in the second recessed portion, in addition to the effect of the invention described in claim 4 In addition, the environment suitable for inhabiting algae and seafood is further improved.

  In order to achieve the purpose of providing a wave-dissipating block that has a high wave-dissipating effect and can also contribute to habitats such as algae and seafood, it has four legs that extend radially from the center. In the wave-dissipating block configured such that the axis of the leg of the block coincides with the center of gravity of the block, the block includes the three legs out of the four legs. This was realized by forming a recess in the central part of the substantially horizontal plane.

  The wave-dissipating block of the present invention will be described below with reference to preferred embodiments. 1 to 6 show a wave-dissipating block according to a first embodiment of the present invention. FIG. 1 is a front view of the wave-dissipating block, FIG. 2 is a rear view, FIG. 3 is a right side view, and FIG. 5 is a plan view, and FIG. 6 is a bottom view.

  1 to 6, a wave-dissipating block 1 according to the present invention has, for example, four identically-formed legs 2a, 2b, 2c, 2d formed by pouring concrete into a mold. It is configured as a tetrapod. The legs 2a, 2b, 2c, 2d are integrated by connecting their base ends 3a, 3a, 3a, 3a to each other, and the legs 2a, 2b, 2c, 2d. Are aligned at the center O (center of gravity) of the wave-dissipating block 1, and these four legs 2a, 2b, 2c, 2d extend radially from the center O at approximately 120 ° intervals. It has a configuration.

  In the present embodiment, the four legs 2a, 2b, 2c, 2d are formed in a regular hexagonal cross section. Further, each leg 2a, 2b, 2c, 2d is formed in a hexagonal pyramid shape having a tapered cross-sectional area gradually decreasing from the base end 3a side to the tip end 3b, and the end face of the tip end 3b is Cut to form a flat surface.

  Of the four legs 2a, 2b, 2c, 2d, the base ends 3a, 3a, 3a of the three legs (the legs 2a, 2b, 2c in the case of FIG. 1) are assembled. The four portions are formed in a substantially horizontal plane, and concave portions 5, 5, 5, and 5 are provided in the central portion of the horizontal plane, respectively. Each of the recessed portions 5, 5, 5, 5 is surrounded by three first recessed portions 5a, 5a, 5a formed discontinuously and the three first recessed portions 5a, 5a, 5a. And a second recessed portion 5b provided in the inner portion.

  The first recessed portions 5a, 5a, 5a are formed of three legs (legs 2a, 2b, 2c in the case of FIG. 1) that are adjacent to each other (in FIG. 1). In this case, notches 6 are provided between the legs 2a and 2b, 2b and 2c, 2c and 2a, and the legs (in the case of FIG. 1, the legs 2a and 2b, 2b and 2c, 2c and 2a) are provided. 3) Three each are formed along the base end portions 3a, 3a, 3a of the legs. Note that. The notch 6 makes it easy to discharge the water that has entered the first recessed portion 5a to the outside.

  On the other hand, the second recessed portion 5b is formed in a state where a stepped portion is provided inward of the first recessed portion 5a at an inner portion surrounded by the three first recessed portions 5a, 5a, 5a. The first concave portions 5a, 5a and 5a are formed in a square shape when viewed from the center O side. In addition, minute stripe-shaped irregularities (not shown) are formed on the bottom surface 8 of the second recessed portion 5b.

  The wave-dissipating block 1 configured as described above is arranged side by side in water near the shores of fishing ports, coasts, rivers, etc. and on the embankment to construct a wave-dissipating structure. In the construction of the wave-dissipating structure, the wave-dissipating blocks 1 are not necessarily arranged in a single stage, and may have several stages.

  And if the wave breaking block 1 installed in the water hits the wave breaking block 1, a part of the water soul of the wave forming the wave is removed from the legs 2a, 2b, 2c, 2d. The wave energy is absorbed by absorbing the wave energy by being taken into the recessed part 5 deeper than the surface of the water, and the wave energy is reduced by the collision between the water soul flowing out from the recessed part 5 and the water soul outside the recessed part 5 To contribute to the wave extinction.

  In addition, the recessed portion 5 eases the impact of the waves, and at the same time, the first recessed portions (upper steps) 5a, 5a, 5a are provided near the outer surface of the block 1 so that water does not collect easily, but the second recessed portion (lower step) ) 5b is provided on the inner side deeper than the first recessed portions 5a, 5a, 5a, so that water easily collects. A healthy habitat. Furthermore, since the bottom surface 8 is provided with a striped minute uneven surface, the minute uneven surface facilitates the attachment of shellfish such as algae and abalone.

  7 to 14 show a wave-dissipating block according to a second embodiment of the present invention, FIG. 7 is a front view of the wave-dissipating block, FIG. 8 is a rear view, FIG. 9 is a right side view, and FIG. 11 is a plan view, FIG. 12 is a bottom view, FIG. 13 is a cross-sectional view taken along line AA in FIG. 12, and FIG. 14 is a cross-sectional view taken along line BB in FIG.

7 to 14, the structure of the wave-dissipating block 10 in the second embodiment of the present invention includes a hollow storage portion 11 in the center of the wave-dissipating block 1 in the first embodiment shown in FIG. 1 to FIG. 6. , Provided with four tubular connecting portions 12, 12, 12, 12 respectively connecting the inside of the storage portion 11 and each of the four recessed portions 5, 5, 5, 5 1 is the same as that shown in FIGS. 1 to 6, the same components are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIGS. 13 and 14, the storage portion 11 is formed with a hollow portion provided at the center of the wave-dissipating block 10.

  The tubular connecting portion 12 is a passage having one end opened to the center of the bottom surface 8 of the second recessed portion 5b and the other end opened to the storage portion 11. In this embodiment, the tubular connecting portion 12 has a hexagonal cross section. Is formed. Moreover, each tubular connection part 12 is formed in the taper shape which becomes small gradually as a cross-sectional area goes to the storage part 11 from the recessed part 5 side.

  The wave-dissipating block 10 configured in this way, when a wave strikes the wave-dissipating block 10 in a state where it is installed in the water, a part of the water soul of the wave forming the wave is transferred to the leg 2. Is taken into the recessed portion 5 which is deeper than the surface, and part of the wave is also taken into the storage portion 11 through the tubular connecting portion 12 to absorb the energy of the wave. Moreover, when the water soul flowing out from the recessed portion 5 and the water soul outside the recessed portion 5 collide with each other, the energy of the wave is reduced, which contributes to the quenching.

  In particular, since each of the storage portion 11 and the four recessed portions 5 in the central portion communicates with each other via the tubular communication portion 12, the path of waves during stormy weather reaches the storage portion 11 (the recessed portion 5 and the tubular portion). In the connecting part 12), the energy is lost due to the rapid contraction and expansion, and the wave is extinguished. Moreover, since the water soul especially stored in the storage part 11 is emitted with a phase difference from the reflected wave at the time of pulling, the wave-dissipating effect is further enhanced. In addition, the interior of the storage unit 11 contributes as a spawning ground and a habitat for fry and seafood when calm.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

The front view of the wave-dissipating block which concerns on 1st Example of this invention. The rear view of the wave-dissipating block which concerns on 1st Example same as the above. The right view of the wave-dissipating block which concerns on 1st Example same as the above. The left view of the wave-dissipating block which concerns on 1st Example same as the above. The top view of the wave-dissipating block which concerns on 1st Example same as the above. The bottom view of the wave-dissipating block which concerns on 1st Example same as the above. The front view of the wave-dissipating block which concerns on 2nd Example of this invention. The rear view of the wave-dissipating block which concerns on 2nd Example same as the above. The right view of the wave-dissipating block which concerns on 2nd Example same as the above. The left view of the wave-dissipating block which concerns on 2nd Example same as the above. The top view of the wave-dissipating block which concerns on 2nd Example same as the above. The bottom view of the wave-dissipating block which concerns on 2nd Example same as the above. FIG. 13 is a sectional view taken along line AA in FIG. 12. BB sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wave-dissipating block 2a, 2b, 2c, 2d Leg 3a Base end part 3b Front-end | tip part 4 Axis 5 Recessed part 5a 1st recessed part 5b 2nd recessed part 6 Notch part 8 Bottom face 10 Quenching block 11 Storage part 12 Tubular Connecting part O Center (center of gravity)

Claims (5)

A block having four legs extending radially from the center, wherein the axis of the leg of the block is configured to coincide with the center of gravity of the block.
Wherein among the four leg, three of the sites of four positions proximal end portion of the leg member is set each formed form a respective substantially flat, forming a recess in the symbolic flat surface A wave-dissipating block characterized by Said recessed portion includes a first recess made from the second recess, the first recess is formed in a portion adjacent to the proximal end of each leg in the upper Kiryaku plane, said second recess portion The wave-dissipating block according to claim 1, wherein a stepped portion is provided inward of the first recessed portion.   The wave-dissipating block according to claim 2, wherein minute irregularities are provided on all or part of the inner surfaces of the first and second recessed portions. A block having four legs extending radially from the center, wherein the axis of the leg of the block is configured to coincide with the center of gravity of the block.
A hollow reservoir formed in the center where the axes of the four legs intersect;
Of the four legs, the four portions where the base ends of the three legs are respectively gathered are formed in a substantially plane, and a recess is formed in the substantially plane. A wave-dissipating block comprising four tubular connecting parts each communicating with each of the four recessed parts and the storage part. The concave portion is composed of a first concave portion and a second concave portion, and the first concave portion is formed at a site adjacent to the base end portion of each leg in the substantially plane .
The wave-dissipating block according to claim 4, wherein the second recessed portion is formed by providing a stepped portion inside the first recessed portion.

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