JP4013210B2 - River concrete blocks and concrete blockers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to the creation of a concrete block for rivers and a concrete block builder that can be used for revetment of rivers and fish courses in riverbeds, rivers and lakes. A block that can form a revetment with a fishery close to a natural river channel that can avoid the attack of the river, a small river with a dwelling place such as a river or a lake slope, and can be favorably constructed, and the block is advantageous It is intended to provide fishway blockers and revetments.
[0002]
[Prior art]
A concrete block with a steep slope in the riverbed that forms a drop by a concrete weir to mitigate the flow velocity, lays natural boulders, embeds it in concrete, or makes the surface a pseudo-rock with large irregularities To create an image of a natural riverbed with a rocky surface by placing it on a slope to form an image of a natural mountain stream by forming various flows with different widths and depths by large and small protrusions Has been done.
[0003]
[Problems to be solved by the invention]
In the case of using the conventional technology as described above, when this is adopted for a water flow portion having a height difference, a rapid flow is formed on the block, and it is not easy even if fish and the like try to go up, and the head falls. Most fish species cannot go up in places such as large dams. In addition, fossil fish and fish with poor physical strength cannot be moved up even on the stone-sloped type of fishway with a combination of large and small stones. It is clear that it is quite tired because there is no such thing, and in such a situation, there is a disadvantage that it is easy to be attacked by birds and the like. In addition, when used on a slope, the stones are visible, the nature is close, but the plants do not grow, and a cold revetment where no creatures can grow is formed.
[0004]
[Means for Solving the Problems]
The present invention has repeatedly studied to solve the problems in the prior art as described above, and by using a specific block, a preferable fishway or water flow condition having a resting place can be formed, plants can grow, and small animals can live It was a successful one, as follows.
[0010]
(1) A large or small natural stone material is embedded on the surface of the square plate, or a relatively small and large natural stone-like protruding pattern is arranged, and a relatively large natural stone-like protruding pattern is partially provided on the side or corner portion. Forming a hollow portion on the lower surface and forming a partial connecting concave portion on the side wall portion or corner portion of the rectangular plate provided with an inlet / outlet for the hollow portion on the side surface, and a connecting member in the connecting concave portion A concrete block for rivers, characterized in that
[0011]
(2) The concrete for rivers according to (1) above, wherein a natural stone having voids communicating with a square plate is embedded, or a natural stone-like protruding pattern, only a square plate, or both are formed as porous concrete. block.
[0013]
(1) to (2)A cavity with an entrance formed on the lower surface of a relatively large natural stone projecting pattern composed of river concrete blocks is a habitat or evacuation site for fish, other aquatic organisms, small animals and waterside organisms Concrete blocker.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Specific embodiments of the present invention as described above will be described with reference to the accompanying drawings. In the present invention, examples are shown in FIG. 1 to FIG. 4 and connected and used as shown in FIG. In this case, in the case of FIGS. 1 to 4 which is the first embodiment, there is a demand for labor saving and labor saving in recent years. The rectangular block 1 which is larger than the conventional block and is about twice as wide as the depth has a relatively small natural stone-like protruding pattern 10 of about 5 to 15 cm on the plate surface and a relatively large size. A natural stone-like protruding pattern 11 of about 20 to 50 cm is randomly arranged, and a quadrant is formed in a zigzag pattern as shown in FIG. 1 near the both ends of one of the blocks 1 and the center of the other side. Large natural stone convex cut from one to half An exit pattern 11a is provided, and a cavity 12 is appropriately formed on the lower surface thereof as shown in FIGS. 2 and 3, and an entrance / exit 13 for the cavity 12 is provided on a side surface thereof as shown in FIG. It is. Further, the protruding patterns 10 and 11 can be made closer to nature by embedding real natural stones.
[0015]
In the block 1 shown in FIGS. 1 to 4, two connecting recesses 14 are arranged in the long side direction and one connecting recess 14 in the short side direction. Are connected and integrated with anchor bars from the foundation concrete so that the blocks 1 provided as an array joined state are not flowed by the pressure of water flowing by the shackle 16 as shown in FIG. Appropriately embedded in concrete or mortar.
[0016]
The blocks 1 are arranged on the slopes of the riverbed with a drop along the straight concrete 31 and are connected to each other as shown in FIGS. 5 to 8, and each block 1 is shown in FIG. The blocks having the large, medium, and small natural stones or the natural stone-like protruding patterns 10 and 11 shown in FIG. 1 are obtained by alternately and planarly reversing 180 degrees and connecting the connecting recesses 14 and 14 as opposed to each other. As shown in FIG. 6, the large, medium, and small natural stones or protruding patterns 10 and 11 are arranged near the center of the side between the blocks 1 and 1 or between the blocks 1, 1, 1, 1. 7, one large natural stone-like protruding pattern is synthesized by a large natural stone-like protruding pattern 11 a formed into a quarter or half size having a hollow portion at the corner between them. It is constituted in the form arranged like a staggered pattern. In other words, when such a block work forms an inclined surface as shown in FIG. 6, the water flow meanders between the large natural stone-like protruding patterns 11, and the water flow has various widths, depths, flow rates, etc. In addition, the inside of the cavity 12 having the entrance / exit 13 is formed by the large protruding pattern 11a, and constitutes a stagnation area where water is appropriately supplied and discharged.
[0017]
Therefore, even if the block work connecting the blocks 1 as shown in FIGS. 5 and 6 is inclined as shown in FIG. 6, the water flow flowing through the part changes variously, and the rapid part, the stagnation part or the slow part is combined. Fishes and other fish can go up and down in the water basin, which is rich in changes, without having to be attacked by birds. Further, as shown in FIG. 6, between the connecting recesses 14 and 14 set opposite to each other, as shown in FIG. 6, the anchor bars 17 are used to connect to the foundation portion, and further, concrete or mortar is filled. When it is not preferable that the concrete or mortar filling portion is exposed as it is, a natural stone material 18 is embedded to ensure an overall natural feeling and a feeling of incongruity.
[0018]
9 and 11 show a block 2 as a second embodiment according to the present invention. That is, this block 2 is the same as the block 1 according to the first embodiment described above in that the overall shape is a rectangular part, and is embedded in a large natural stone or large protruding pattern 11 or a small natural stone or small size. The arrangement relationship of the protruding pattern 10 is the same, but a large natural stone-shaped protruding pattern 11a cut into a quarter having the entrance part 13 and the cavity part 12 is arranged at the corner part, and further, FIG. As shown in the block 2a, a porous concrete 35 in which an infinite number of voids are formed in a protruding pattern is formed, and each of the connecting recesses 14 is provided on the long side as well as on the short side. As shown in FIG. 11, a concave portion 20 is appropriately formed on the surface so as to form a stagnation portion in the water flow flowing on the plate surface. It goes without saying that the same effect or more can be expected by using natural stones such as porous volcanic rocks instead of the porous protrusion pattern. In the case of this FIG. 9, there is no problem in construction even if the blocks are simply arranged side by side or reversed and arranged in the same relationship as in FIG. There are regular breaks and shelters. In addition, the inside of the void portion of the porous concrete becomes a place where aquatic insects live, and it is purified by the action of microorganisms in the hole by passing through the space portion, and the water flow is weakened to make it easier for fish to swim. In addition, many small irregularities on the surface can easily be attached to aquatic plants and algae, and can serve as food for fish going up. And the structure of this porous concrete 35 can be used for a wide range of uses by making it only the plate | board surface of the block 2b of FIG. 12, or making the whole block 2c of FIG. 13, the gradient used, and the objective. Needless to say, the configurations of FIGS. 10, 12, and 13 may be applied to the block plates of FIGS.
[0019]
14, 15, and 16 show a block 3 as a third embodiment according to the present invention. In this block, a small natural stone or small protruding pattern 10 in the block 3, a large natural stone is shown. Or arrangement | positioning of the large bulging pattern 11 and the recessed part 20 etc. is the same as that of things, such as FIGS. 9-13 or FIGS. 14 to 16, instead of the connecting concave portion 14, a cornering portion 30 formed at the corner of the block 3 is employed, that is, the connecting bracket 15 is provided on the cornering portion 30. In this case, a large natural stone-like protruding pattern 11a cut in half having an entrance 13 and a cavity 12 is arranged on both sides of the long side and one of the short sides. For example, in FIG. By setting the state rotated 180 ° around the axis, it is possible to construct a rest or rest area for fish etc. in a staggered manner, and change from the low water level on the slope to the river bed. An example of using the water level as a revetment will be described.
[0020]
That is, the connection construction state of the block work by the third block 3 is as shown in FIGS. 17 to 21, and the block 3 as described above is arranged between the concrete concrete 31 and the small concrete part 32. It is the same as in FIGS. 5-7 etc., but since it is used not on the riverbed but on the slope, the pressure due to the water flow is also small, so that the chamfer as shown in FIGS. An exact connection state can be formed by providing a simple U-shaped connecting bar 16a between the connecting fittings 15 and 15 opposed to each other.
[0021]
As shown in FIG. 18, when the inclined surface of the low water level portion at the shore is formed by using the sand prevention plate 33 or the like, the inside of the hollow portion 12 formed in a staggered pattern in the underwater area is as shown in FIG. It serves as a habitat for insects, and functions as an evacuation site during floods. In the high water level slopes, the aerial cavity 12 is generally a habitat or hiding place for terrestrial insects, amphibians or small animals. Become. In the underwater area, earth and sand are deposited between the large and small protruding patterns 10, 11 and are suitable for habitat and spawning of fry and aquatic organisms. As shown in the figure, 34 grows and grows and appropriate greening is achieved. A natural stone 18 is set in the joint as shown in FIG. 20 as shown in FIG.
[0022]
FIG. 22 shows the block 3a when the plate surface of the block 3 according to the present invention is provided on the porous porous concrete 35, and in the porous concrete block having water permeability as appropriate, the above-described characteristics in the present invention. Can be obtained. That is, FIG. 23 shows a construction state similar to that shown in FIG. 18 or the like using the block shown in FIG. 22, and the porous concrete 35 is ventilated with the bottom soil layer when it is in water. Contributes water and forms a favorable environment for aquatic organisms and underwater plants, forms advantageous growth conditions for plants 34 even in the air, prevents separation during floods, and provides stable habitat for insects and other organisms Parts. As described above, the porous concrete may be formed only as a whole or as a whole as shown in FIGS. 10 and 13, depending on the intended use. .
[0023]
24 to 27 show a fourth block plate 4 according to the present invention. In this case as well, large and small natural stones or large and small protruding patterns 10 and 11 are arranged, and a connecting metal fitting 15 is provided at the corner. As shown in FIGS. 18 and 19, the blocks are connected to each other. In addition, a through hole 41 is provided to allow water to flow between the bottom base layer of the block plate 4 and a large size. The cavity 12 formed inside the protruding pattern 11 is also opened at the bottom surface of the block plate 4 as shown in FIGS.
[0024]
That is, the construction state by the fourth block plate 4 shown in FIGS. 24 to 26 is as shown in FIG. 24, and the bottom surface opening 42 of the cavity 12 opens directly to the foundation ground, and in the water area. Suitable for growth of aquatic plants and wide cavity, so it has a preferable function as a fish nest for large fish, etc., and the through hole 41 is easily filled with earth and sand and natural stone, and the gap becomes a place for aquatic insects and fry. . In the aerial area, the roots of the vegetation extend directly into the strata, making it easy to grow, and the greenery can be seen and hidden between the rocks, and trees such as willows grow from the through holes, combined with the vegetation prosperity. The cavity is a place for small animals such as wild mice. FIG. 28 shows a construction state with a block plate 4a in which the entire block of FIGS. This allows ventilation through the back of the block, and purification can also be expected by passing water through. The surface gaps are underwater and algae grows in the water, and grass grows in the air. Then you can cover the whole with green. Further, by using the porous blocks shown in FIGS. 24 to 26 and FIG. 28 for a fishway or the like in the riverbed, the through hole 41 functions as a stagnation part in addition to the effects described above.
[0025]
29 to 31 show a fifth block plate 5 according to the present invention. In this case, the height of the projecting pattern or the embedded natural stone varies depending on the area. This is a case where the state is substantially constant as shown in FIG. Specifically, the heights of the protruding patterns 10 and 11 are both in a constant state of about 3 to 5 cm and are generally flat, so that they are suitable for human walking. The formation of the through hole 41 reaching the bottom surface is the same as that shown in FIGS. 24 to 26 for the fourth block 4, but since the cavity portion 12 is lowered, the entrance / exit 13 is provided beside the protruding pattern. It is formed so that fish can easily enter and exit. The construction state of the fifth block 5 is as shown in FIG. 32, and it is described above that conditions suitable for the growth of seafood and other habitats and plants can be formed in the cavity 12 or the through hole 41. It is as follows. In addition, as described above, natural stones with voids may be embedded, the protruding pattern, the block plate, or the whole may be composed of porous material.
[0026]
FIGS. 33 and 34 show a block 6 according to the sixth embodiment of the present invention modified so that a plurality of blocks shown in FIGS. 29 to 31 can be connected and constructed. FIGS. 35 and 36 show the sixth block. The state of the block work constructed using the block 6 is shown. That is, the sixth block 6 is formed with two trapezoidal protrusions 61 on one side in the long side direction and a recess 63 having the same shape between the protrusions 61 and 61. A recessed portion 64 having the same shape and having a half area is provided on the outer side, and one trapezoidal protrusion 61 is formed in the central portion on the other side, and 2 in area at both ends. The partial protrusions 62 and 62 that are set to a half are provided, and through-holes 61 a and 62 a for connection are provided in the protrusions 61 and 62, and recessed portions 63 having the same shape as the protrusions 61 are provided therebetween. , 63 are formed.
[0027]
That is, the sixth block 6 is assembled by fitting the protruding portion 61 to the recessed portion 63 and fitting the partial protruding portion 62 to the recessed portion 64 that is halved in area. By using a sheet pile etc. to unite a plurality of joints such as reinforcing bars for connection to the water, or by lifting and installing under conditions of water flow, the low water level method from the river bed as shown in FIG. An assembly state as a substantially stable block work having a fast workability and continuously mating with each other is formed, and the block work as shown in FIG. 36 can be easily constructed.
[0028]
37 and 38, as a seventh embodiment of the present invention, a back surface that is embedded and integrated in the concrete on the back surface without providing the connecting recesses 14 or the chamfered portions 30 for connecting the blocks described above. FIG. 39 shows a state in which this is constructed as a revetment for a steep slope. That is, the projecting portions 71 and 71 are filled with backfill concrete 73 to be connected and integrated on the backfill crushed stone 72 as a revetment, and can be accurately combined to form a stable revetment as an integral revetment. Inside is a fish nest or evacuation site in the water area, and a place for insects and amphibians in the air area, and sediments naturally accumulate and aquatic and terrestrial plants grow to create a more natural atmosphere. In addition, it is possible to embed natural stones in place of protruding patterns as described above. By using porous patterns for these protruding patterns and block plates, water purification, moss, algae, etc. are activated and growth is promoted. Needless to say.
[0029]
FIG. 40 and FIG. 41 show that the eighth embodiment of the present invention is suitable for forming a revetment wall only by stacking without steeply placing backfilled concrete, that is, without disturbing the flow velocity. The figure shows a case where natural stones or protruding patterns 10 and 11 having a constant protruding height are formed. As described above, it is possible to change the size of the natural stone and the protruding pattern to be embedded depending on the intended use. Although the height of the block 8 is constant, it is the same as that shown in FIGS. 29 to 31, but in the eighth block 8, the thickness of the block plate is increased and the reinforcing bar 81 is inserted as shown in FIG. In addition, a through-hole 80 for connecting the blocks 8 and 8 stacked in a concrete or mortar 82 in the height direction is formed, and back-filled concrete is placed on the back-ground crushed stone. The blocks 8, 8, and 8 can be directly assembled without doing so, and even a steep revetment can be formed easily and accurately.
[0030]
The cavity 12 formed inside the relatively large protruding pattern 11 serves as a refuge for fish nests or underwater organisms, and soil and sand accumulate at the waterside to contribute to greening. Furthermore, amphibians, insects, etc. However, it is substantially flat and does not obstruct running water or the like. As described above, the natural effect of the natural stone of the block 8 is embedded, or the effect is expanded by making the protruding pattern, the block plate or the whole porous.
[0031]
As described above, according to the present invention, large and small natural stones are embedded on the surface of a square plate, or relatively small natural stone-like protruding patterns and relatively large natural stone-like protruding patterns are arranged. This creates a natural riverbed or river or lake slope feeling, creates equipment that fits the surrounding environment without creating a sense of incongruity, even with a block structure, and allows the water flow to flow appropriately. Meander to mitigate the flow velocity.
[0032]
By forming a cavity in the lower surface of the relatively large natural stone-like projecting pattern in the configuration as described above and providing an entrance to the cavity on the side surface thereof, it is a fish bed with a large head in water. When used, it creates an image of a natural mountain stream and allows for resting during the run-up in consideration of fish species with low swimming ability, thus preventing attacks from birds. In addition, the water flow used for riverbeds and slopes is taken into the cavity and a stagnant area is formed to rest or inhabit fish and aquatic organisms. In the air, small animals, amphibians, insect dwellings and plant growth The preferable conditions are formed. Porous concrete and similar natural stones are buried to allow ventilation and water flow with the back soil, contributing to purification, and creating a more natural atmosphere where the aquatic and terrestrial plants are easy to settle.
[0033]
A relatively large natural stone-like protruding pattern is partially formed on the side of the rectangular plate, and the entrance to the cavity is formed in a direction crossing the side, as described above. In addition, the cavity forming the habitat is formed as a large structure with crotch in a plurality of blocks, and the above-described effects can be effectively obtained and the feeling as a precast concrete structure can be reduced.
[0034]
Forming a water bottom or riverside structure with multiple blocks properly connected by forming a partial connection recess in the side or corner and providing or providing a connection member in the connection recess And ensure stability as a river structure.
[0035]
By forming a ridge on the bottom of the square plate to engage the back structure, placing back-filled concrete on the back to form an integral revetment, or stacking thick blocks to insert the reinforcing bars Concrete is filled and engaged effectively, and stable construction as a river structure is performed on steep riverbanks.
[0036]
A rectangular rectangular plate whose long side is 1.5 times or more of the short side, and a plurality of connecting concave portions are formed on the long side, and a relatively large natural stone-like protruding pattern is formed on one side of the short side. It is formed as a half state in the middle part in the water and at both ends on the other long side as a quarter state so that it does not stop water and connects a plurality of blocks together. Form a riverbed or riverbank structure that facilitates construction.
[0037]
Any of the above-mentioned river fishway blocks as described above are arranged on the low water level part or the high water level part of the slope of the riverbed or the riverbed or the riverbed with a large head, and formed on the side or corner part. A plurality of blocks are connected to each other by being connected to each other by the connecting members provided in the partial connecting recesses, so that a stable construction state can be formed easily and accurately by setting the riverbed or slope. .
[0038]
An entrance is formed in a cavity formed on the lower surface of a relatively large natural stone protruding pattern, and the cavity serves as a refuge for birds as a fishway and a resting place for fish species with weak swimming ability. In the water, it functions as a habitat or refuge for fish and other aquatic organisms or aquatic organisms, and as a habitat for aquatic plants. In the air, it functions as a habitat for insects and small animals, and as a habitat for plants.
[0039]
A large natural stone protrusion pattern that is crotch into a plurality of blocks by a natural stone protrusion pattern that is formed as a part on the side or corner, and a large cavity on the bottom surface is formed to create aquatic and terrestrial Forms a space suitable for various organisms, aquatic and terrestrial plants.
[0040]
【The invention's effect】
According to the present invention as described above, large and small natural stones are embedded, or a relatively small natural stone-like protruding pattern and a relatively large natural stone-like protruding pattern are arranged, and the surrounding environment or landscape A concrete block for rivers that is well-suited to the river, and a masonry blocker, and of course, the fishway and the floor are combined, and the flow velocity of the river flowing over the block is moderated properly. Using a hollow formed on the underside of a large natural stone-like protruding pattern, it provides a resting or retreating place for aquatic and terrestrial organisms along with such a slowing of the flow velocity, and attacks such as birds on the fishway Effectively avoiding effectively, ensuring safe swimming and inhabiting, and also ensuring the favorable protection of river beds, etc., it is possible to accurately obtain the effect by precast concrete blocks, industrially the effect It is a great invention.
[Brief description of the drawings]
FIG. 1 is a plan view showing an example of a first concrete block according to the present invention.
FIG. 2 is a side view of what is shown in FIG. 1 as viewed from below.
FIG. 3 is a side view of what is shown in FIGS.
FIG. 4 is a plan view showing a cavity arrangement relationship shown in FIGS.
FIG. 5 is a plan view of a block work formed by the one shown in FIGS.
6 is a cross-sectional view of the block work shown in FIG.
7 is a plan view showing a cavity arrangement relationship of what is shown in FIGS. 5 and 6. FIG.
FIG. 8 is a partial cross-sectional view of the connecting portion.
FIG. 9 is a plan view of a second concrete block according to the present invention.
10 is a cross-sectional view in which the protruding pattern shown in FIG. 9 is formed of porous concrete.
11 is a cross-sectional view of the upper part of the rectangular plate showing the arrangement relationship between the cavity and the opening shown in FIG. 9;
12 is a cross-sectional view of the plate surface shown in FIG. 9 formed of porous concrete.
13 is a cross-sectional view of the protrusion pattern and the plate surface shown in FIG. 9 formed of porous concrete.
FIG. 14 is a plan view showing a third concrete block example according to the present invention.
15 is a side view of what is shown in FIG. 14 as viewed from below.
FIG. 16 is a side view of what is shown in FIGS. 14 and 15 as viewed from the right side of the drawing.
FIG. 17 is a plan view showing a connected construction state of what is shown in FIGS.
18 is a cross-sectional view of FIG.
FIG. 19 is a partial plan view of the block body connecting portion.
20 is a partial cross-sectional view of FIG. 19 with a covering material applied.
FIG. 21 is a plan view showing a state in which the cavity is provided in the structure shown in FIG.
FIG. 22 is a side view of one block portion using a porous concrete block.
23 is a cross-sectional view showing a construction state of what is shown in FIG.
FIG. 24 is a plan view showing a fourth concrete block according to the present invention.
25 is a side view seen from below in FIG. 24. FIG.
FIG. 26 is a side view of what is shown in FIGS. 24 and 25 as seen from the right side of the figure.
FIG. 27 is a cross-sectional view showing a construction state of what is shown in FIGS.
FIG. 28 is a cross-sectional view showing a construction state when the block shown in FIGS.
FIG. 29 is a plan view showing a fifth concrete block according to the present invention.
30 is a side view of FIG. 29 as seen from below.
FIG. 31 is an end view of the one shown in FIGS.
32 is a cross-sectional view showing a construction state of what is shown in FIGS. 29 to 31. FIG.
FIG. 33 is a plan view showing a sixth concrete block according to the present invention.
FIG. 34 is a side view thereof.
35 is a plan view of a block construction formed by the blocks shown in FIGS. 33 and 34. FIG.
36 is a cross-sectional view of what is shown in FIG. 35. FIG.
FIG. 37 is a rear view of a seventh concrete block suitable for steep revetment according to the present invention.
FIG. 38 is a side view seen from below.
39 is a cross-sectional view showing a construction state of what is shown in FIGS. 37 and 38. FIG.
FIG. 40 is a side view of an eighth concrete block using a reinforcing bar according to the present invention.
41 is a partially cutaway side view showing a revetment wall configuration state by the block shown in FIG. 40. FIG.
[Explanation of symbols]
1 First concrete block according to the invention
2, 2a, 2b, 2c Second concrete block according to the present invention
3,3a Third concrete block according to the invention
4,4a Fourth concrete block according to the invention
5 Fifth concrete block according to the present invention
6 Sixth concrete block according to the invention
7 Seventh concrete block according to the invention
8 Eighth concrete block according to the present invention
10 Small natural stone or small protruding pattern (natural stone shape)
11 Large natural stone or large protruding pattern (natural stone shape)
11a Large protruding pattern
12 Cavity
13 doorway
14 Connection recess
15 Connecting bracket
16 Shackle
16a connecting rod
17 Anchor muscle
18 Natural stone
20 dent
30 Chamfering part
31 Law concrete
32 Small concrete
33 Anti-sand plate
34 plants
35 Porous concrete
41 Through hole
42 Bottom opening
61 Trapezoidal protrusion
61a The through hole
62 Partial protrusions that are halved in area
62a The through hole
63 trapezoidal recessed part
64 Recessed part that is half the area
71 Projection
72 Back-filled crushed stone
73 Backfilled concrete
80 Through hole
81 Rebar
82 Concrete or mortar

Claims (3)

A large or small natural stone material is embedded on the surface of the square plate, or a relatively small and large natural stone-like protruding pattern is arranged, and a relatively large natural stone-like protruding pattern is partially formed on the side or corner. A hollow portion is formed on the lower surface and a concave portion for connection is formed in a side wall portion or a corner portion of the rectangular plate provided with an inlet / outlet for the hollow portion, and a connecting member is provided in the concave portion for connection. This is a concrete block for rivers. 2. The river concrete block according to claim 1, wherein a natural stone having voids communicating with a square plate is embedded, or a natural stone-like protruding pattern and / or a square plate are formed as porous concrete. A cavity having an entrance formed on the lower surface of a relatively large natural stone projecting pattern formed by combining the river concrete blocks according to any one of claims 1 to 2 is a fish or other aquatic or small animal, A concrete blocker characterized as a habitat or evacuation site for waterside creatures.

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