JPH047221Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a civil engineering block that functions as a bank protection for rivers, coasts, etc., erosion control, and fish nests.

[Conventional technology]

BACKGROUND ART Conventionally, there are various types of blocks for seawalls, erosion control, etc., such as those that form planar gaps between blocks when arranged, and those that have complex shapes for wave dissipation.

These seawalls and sabo blocks, especially sabo blocks, are designed to prevent sand from being eroded by tidal currents by minimizing seawater resistance and preventing destruction.

[Problem that the invention attempts to solve]

However, although conventional blocks perform the functions of erosion control and bank protection, the voids obtained by combining these blocks cannot be used as fish nests, etc.
Particularly when laid out three-dimensionally, the water flow path is blocked and the resistance increases.

Therefore, when blocks are stacked to ensure bank protection or erosion control, the voids formed by the blocks cannot be used as water flow paths, which increases the resistance to the blocks and reduces the construction strength and the strength of the blocks themselves. There are problems such as the need to make it quite large.

In addition, the spaces between the blocks, which are suitable as fish nests and hatching grounds for shrimp, crab, and other larvae, cannot be used, which greatly affects the growth of plants, which also poses problems in terms of fisheries.

The purpose of this invention is that in addition to the conventional block functions such as bank protection and erosion control, the voids between each block can be used for the growth of vegetation regardless of the layout of the blocks.
Moreover, the purpose is to reduce the resistance received from water and prevent its destruction.

[Means and actions for solving problems]

The present invention is a civil engineering block used for seawalls, erosion control, or fish nests, and the horizontal cross section is divided into two circular arc areas of equal diameter each centered on two diagonal points of the same square from a square cross-sectional shape. It has a shape in which two circular arc regions of equal diameter smaller than the above circular arc are cut out, and a notch is formed in the radial direction of the large diameter circular arc surface on at least one of the upper and lower surfaces. , the gaps formed by adjacent blocks are communicated with each other by cutouts.

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIG. 1 is a perspective view of a block 1 according to the present invention, and FIGS. 2 and 3 are a front view and a plan view thereof.

The horizontal section of block 1 has a square cross-sectional shape, and is divided into two areas of equal diameter circular arcs C ₁ and C ₂ centered on two diagonal points P ₁ and P ₂ of the same square, respectively, and two other diagonal points P _{3 .} , P ₄ and have two equal diameter arcs C ₃ and C ₄ smaller than the above-mentioned arcs are cut out.

By cutting the above arc C ₁ and C ₂ area, the large arc part 2
are formed on both sides, and small arc parts 3 are formed on both ends by cutting the arcs C ₃ and C ₄ , and further both arc parts 2, 3 are formed.
Cut surfaces 4 are formed at four positions with angles of 90° to each other on the continuous end portion.

Further, reference numeral 5 denotes a notch provided on one side of the substantially center of the large circular arc portion 2, and may be formed on both the upper and lower surfaces.

FIG. 4 is a plan view showing the layout of the blocks 1, in which four adjacent blocks 1 are considered as a unit, and their respective cut surfaces 4 are in contact with each other to form a gap 10 with a circular cross section by the large circular arc portion 2, and the small circular arc portion Similarly, mortar filling part 1 with a circular cross section is formed by 3.
1 is formed.

FIG. 5 is a cross-sectional view taken along the line - in FIG.
Even if the block units are stacked in stacks, the gaps 10 of each block unit communicate with each other, resulting in a structure that communicates with the outside world.

In this layout, the mortar filling part 11
Construction can be carried out on site by filling the inside with mortar 20 and connecting adjacent blocks 1.
Further, after this construction, chestnut stones 21 and the like are thrown into the cavity 10 to add functions as erosion control and a fish nest.

When the block 1 with the above structure is laid on the coast for erosion control, the notches 5 communicate with each other through the gaps 10, so seawater can flow through the notches 5 and the gaps 10 as channels, and the block 1 itself The flow pressure received can be reduced. Therefore, each block 1
The connection by the mortar 20 does not become soft, and sand erosion phenomenon can be reliably prevented. In addition, sludge on the ocean floor and riverbed can become blocked by water flow.
In the case of sludge, the chestnut stone 21 in the cavity 10 functions as a filter and can be used to purify the sludge and prevent pollution of rivers and seas.

Moreover, if this block 1 group is laid on the riverbed or seabed, water will flow freely in the gap 10 using the notch 5 as a flow path, so the gap 10 can be used as a fish nest. Therefore, the voids 10 are not only suitable for the inhabitation, spawning, and hatching of shrimp, crabs, seafood, and microorganisms, but also can be used for the attachment and propagation of spores of sphagnum moss, green seaweed, aquatic algae, and the like. In particular, since it is most suitable for the breeding and habitat conditions of firefly larvae, it also has the advantage of being able to be installed in firefly farms.

[Effect of idea]

In this invention, the cavity surrounded by the blocks is opened to the outside by the notches provided in each block, so when installed as a seawall or erosion control, resistance such as seawater can be released through the notches. . Therefore, the stable installation of the blocks can be maintained, and the seawall and erosion control can be strengthened.

Furthermore, since seawater or river water can freely enter and exit the cavity through the notch, the cavity can also be used as a fish nest. Therefore, it can be used not only for bank protection and erosion control, but also as a place to grow fish and shellfish, and its functionality is significantly improved compared to conventional blocks.

[Brief explanation of drawings]

Figure 1 is a perspective view of the block according to the present invention, Figure 2 is a perspective view of the block according to the present invention;
3 is a plan view of the same, FIG. 4 is a plan view of the layout, and FIG. 5 is a cross-sectional view of FIG. 1...Block, 2...Large arc portion, 3...Small arc portion, 4...Cut surface, 5...Notch, 10...Gap, 11...Mortar filled portion.

Claims (1)

[Scope of utility model registration request] It is a civil engineering block used for seawalls, erosion control, or fish nests, and the horizontal cross section is divided into two circular arc areas of equal diameter centering on two diagonal points of the same square, and two other diagonal points. Civil engineering, characterized in that the shape is formed by cutting out two circular arc regions of equal diameter smaller than the circular arc with each point as the center, and further a notch is formed in the radial direction of the large diameter circular arc surface on at least one of the upper and lower surfaces. block.