JPH0440482B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to revetments for river banks, coasts, etc., and more specifically, plants can grow on the upper side of the revetment, and fish etc. can live on the lower side. As soon as possible, we will build seawalls that can contribute to nature conservation.

(Prior Art) In order to protect river banks, coasts, embankments, etc. from erosion caused by water currents, waves, etc., bank protection construction is performed.

Generally speaking, seawall construction involves simply attaching concrete blocks or stones to the shore to protect it from water currents and waves.

By the way, bank protection work that involves simply pasting concrete blocks, etc., may result in covering the bank with concrete blocks, stones, etc., and as a result, there will be no soil surface at the construction site, making it impossible for plants to grow or for fish etc. The current situation is that the natural ecological environment of flora and fauna is being severely destroyed, with suitable habitats disappearing for aquatic animals.

In order to improve the above-mentioned drawbacks, seawalls with vegetation and fishing reefs have also been proposed. (Refer to JP-A-56-39242 and JP-A-56-412.) (Problems to be solved by the invention) However, the known seawalls that have both the functions of vegetation and fishing reefs have the following problems. It was hot.

In other words, the two habitats for fish are open habitats where food such as plankton can easily enter by opening to the flow, and closed habitats where they are closed and dark to protect themselves from predators. Both areas are necessary. Moreover, these open habitats and closed habitats must be in communication so that they can easily escape from the open habitat to the closed habitat.

However, in the above-mentioned known seawall, the open habitat area and the closed habitat area are not communicated vertically and horizontally, and therefore are insufficient as a habitat for fish.

In addition, the known fishing reef block does not have the functions of both an open habitat and a closed habitat with only one type of block, and therefore has the problem of high cost.

Therefore, the object of the present invention is to fulfill the functions of both vegetation and fishing reef using only two types of blocks, and at the same time, to allow both the open habitat area and the closed habitat area of the fish reef to freely communicate vertically and horizontally. The objective is to provide an effective fishing reef for fish habitat, and thereby provide a seawall that will not harm the ecological environment of natural creatures even if seawall construction is performed.

(Means for Solving the Problems) The present invention is characterized by the construction of revetment blocks 2 and 3 that perform revetment work by combining a large number of them vertically and horizontally.
In this case, the blocks 2 connected above the seawall and above the water surface line include a rectangular seawall part 7 that contacts the shore, and a part of the left and right ends of the seawall part 7 that are moved toward the center. A gap 11 is formed between two side walls 8 vertically protruding forward from the sea wall 7, an opening 9 formed at the center of the two side walls 8, and the sea wall 7. The block 3 is made up of a rectangular revetment part 7 that contacts the shore and a lower wall 10 of equal width, and is connected below the revetment and below the water line. Two pieces of side walls 8' are formed to project vertically forward from the bank protection part 7, leaving a part of the left and right ends of the part 7, and an opening 9 formed in the center of the two pieces of side walls 8'. and two closing walls 12 extending from the protruding end of the corner side wall 8' in the left-right direction to have the same width as the bank protection part 7, and extending from the lower part of the closing wall 12 toward the bank protection part 7. At the same time, a lower wall 10 is provided extending between both side walls 8'.
and a gap 11 formed between the lower wall 10 and the bank protection part 7, and the blocks 3 are installed vertically with only half of the phase shifted from each other,
The two types of seawall blocks 2 and 3 function as both vegetation and fish reefs.

(Example) An example of the present invention will be described below with reference to the drawings. In this embodiment, concrete blocks are used as part of the seawall, but as will be understood from the following explanation, the material is not limited to the material.

FIG. 1 shows the front of a seawall constructed using a seawall block according to an embodiment of the present invention. A seawall is formed by joining together many concrete blocks vertically and horizontally. FIG. 2 is a sectional view taken along the line X--X of FIG. 1.

Line A is the horizontal line under normal conditions, and the area below line A is underwater. The block 1 separates the upper part and the lower part of the seawall, and the upper part is made into a soil storage part by providing a large number of recesses with the block 2.
This soil storage section further includes a top row beyond the line A for ordinary plants, and a third row below the line A.
Divide the rows into rows b for aquatic plants and rows b for aquatic plants. Cover the top of block a with block 4. On the other hand, in the lower part of the block 1, a large number of recesses are provided by the block 3 to form a fishing reef c.

The reef c consists of a reef chamber 5 with an open front and a reef chamber 6 with a closed front, and communicates the inside of each reef chamber vertically and horizontally.

Soil storage part a of the seawall formed as above,
Place the soil in b. In this way, normal plants will naturally grow in part a and aquatic plants will grow in part b, but any plants may be artificially planted from the beginning.

On the other hand, in the reef c section of the seawall, as described above, the reef chambers 5 with open fronts and the closed reef chambers 6 are arranged alternately vertically and horizontally, and each reef chamber 5, 6 are connected on the inside. Therefore, the structure is adapted to the various actual ecology of fish. In other words, each fish has a territory, and the territory is defined by dividing it into sections. Also, since fish have a habit of hiding in dark areas to protect themselves from predators, a closed reef chamber 6 is provided. Furthermore, by communicating the reef chambers 5 and 6, fish can move between the reef chambers 5 and 6. In addition, in the fishing reef C chamber, all the lower parts between the blocks are connected, so even if the water level drops to line B in Figure 2, fish will escape to the blocks below the water level of line B, as shown by the broken arrow G. Furthermore, since the water in the upper block flows to the lower block, even if the water level remains low for a long time, water will not accumulate in the block and cause it to become unclean.

Next, the shapes of blocks 2 and 3 will be explained.

Figure 3 shows block 2, and the direction of arrow Y shows the front of the seawall. 7 is a rectangular bank protection part 7, which is a part that prevents erosion of the bank by water flow.
Two pieces of side walls 8 are erected on top of this seawall 7 at positions slightly closer to the center than the left and right ends. This side wall 8
An opening 9 is provided in the center. Below the side wall 8, a lower wall 10 is provided with the same width as the bank protection part 7 in the direction of the bank protection part 7, and there is a gap 11 between the bottom wall 10 and the bank protection part 7. The opening 9 is a preferred embodiment that allows the lateral movement of seeds, soil, water, fertilizer, etc., and the gap 11 is a preferred embodiment that allows the above-mentioned components to move in the vertical direction. Furthermore, the opening 9 and the gap 11 also contribute to weight reduction and cost reduction. Figure 4 shows block 3, with the arrow
Y′ indicates the front of the seawall. Block 3 has a closing wall added to that of block 2. That is,
Of the two side walls 8', a closing wall 12 is provided on the front right side of the right side wall 8', and a closing wall 12 is similarly provided on the front left side of the left side wall 8'.
The closing wall 12 is provided to extend from each side wall 8' in the left-right direction to have the same width as the bank protection part 2. A lower wall 10 is provided extending from the lower part of the closing wall 12 toward the bank protection part 7 and between both side walls 8'. A gap 11 is formed between the lower wall 10 and the bank protection part 7. The space sandwiched between the side walls 8' of a single block 3 forms an open fishing reef 5, and is combined with the side portions of left and right adjacent blocks 3 to form a closed fishing reef chamber 6.

(Effects of the Invention) The present invention configured as described above has the following effects.

In other words, a depression is formed on the upper side of the seawall to accommodate soil, allowing plants and trees to grow, and a fishing reef area is formed on the bottom side of the seawall, which is a depression where fish can live, so even if the seawall is constructed, The natural environment of the shore can be maintained and the purpose of nature conservation can be achieved.

Two types of open reef chambers and closed reef chambers are arranged alternately in the reef section of the seawall, and the reef chambers are connected vertically and horizontally, creating a reef well suited to the ecology of fish. . In addition, since the vertical rows of reefs in the reef section are connected to each other, even when the water level drops, fish can escape to the bottom, and water does not collect, so there is no possibility of filthy puddles.

[Brief explanation of drawings]

Fig. 1 is a front view showing a seawall according to an embodiment of the present invention, Fig. 2 is a sectional view taken along the line X-X of Fig. 1, and Fig. 3 is a perspective view showing a concrete block constituting the seawall of Fig. 1. 4 are perspective views showing concrete blocks of other shapes constituting the seawall of FIG. 1. 2: Block, 3: Block, 7: Seawall,
8: side wall, 8': side wall, 9: opening, 10: lower wall,
11: gap, 12: closing wall, a, b: soil storage area, c: fishing reef area.

Claims (1)

[Scope of Claims] 1. In the revetment blocks 2 and 3 in which revetment work is performed by combining a large number of blocks vertically, horizontally, and horizontally, the blocks 2, which are connected above the revetment and above the water surface line, are in contact with the shore. Square seawall 7
, two pieces of side walls 8 are formed protruding perpendicularly forward from the bank protection part 7 by leaving a part of both left and right ends of the bank protection part 7 toward the center; There is a gap 11 between the opening 9 and the bank protection part 7.
A lower wall 1 having the same width as the bank protection part 7 formed with
0, and the blocks 3, which are connected below the seawall and below the water surface line, are a rectangular seawall part 7 in which the blocks 3 are in contact with the bank.
, two pieces of side walls 8' are formed to protrude vertically forward from the bank protection part 7 by leaving a part of both left and right ends of the bank protection part 7 in the center, and in the center of the two pieces of side walls 8' The formed opening 9, two pieces of closing wall 12 extending from the protruding end of each side wall 8' in the left-right direction to the same width as the bank protection part 7, and the bank protection part 7 extending from the lower part of the closing wall 12. It has a lower wall 10 extending toward the opposite side walls 8' and a gap 11 formed between the lower wall 10 and the bank protection part 7,
The seawall is characterized in that the blocks 3 are installed vertically with a half phase shift from each other, and the two types of seawall blocks 2 and 3 function as both vegetation and fish reefs.