JP2002242156A - Revetment structure taking ecosystem into consideration and ecosystem revetment block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multi-natural type revetment structure harmonized with a natural environment and a revetment block taking the construction ecosystem into consideration. SOLUTION: The revetment structure 1 taking the ecosystem into consideration is so constituted that a revetment slope 4 including the area 5 is constituted of a front wall slab 7, a supporting leg 8 and a buttress slab 9 parallel with the front wall slab 7, the revetment block 2 having a projection 12 of the diagonal direction 11 in one corner 10 of the front wall slab 7, the front end shape 17 of the projection and a partial recess shape 19 having the same shape as that of a side shape 18 in the remaining three corners 14, 15 and 16, a through-hole 29 of the front wall slab 7 and a slit forming recessed section 20 on the side of the front wall slab 7 and a large number of end section revetment blocks 2a without the projection overhanging to the end side for the revetment structure end section or a large number of corner revetment blocks 2b are arranged in the same direction, the projection 12 is fitted to the partial recess shape 19 of the upper neighboring revetment block 2, the backing 27 of gravel 25 is made to the revetment slope 4 on the back 24 of the buttress slab and that the filling 30 of the gravel 25 is made on the circumference of the supporting leg 8 between the front wall slab 7 and the buttress slab 9 and inside of the slit 31 between the inside of the through hole 29 and the neighboring revetment block 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a revetment block to be stacked for revetment on a shore, a dike or a shore of a river, and more particularly to a revetment block used for constructing a multi-natural type revetment structure in consideration of an ecosystem. .

[0002]

2. Description of the Related Art In the rehabilitation of rivers, coasts, etc., various types of concrete revetment blocks have been conventionally used in a stacked manner in order to protect riverbeds, river banks, shores, embankments and embankments. . These revetment blocks are pre-manufactured in factories and are built in layers at the site, and are widely implemented because they can be constructed in a shorter time and at lower cost compared to revetment work performed by concrete at the site. I have. Conventionally, such a revetment block relates to an embankment or embankment for the purpose of protecting against flooding caused by flooding of a river or the like as much as possible. However, in recent years, the construction of embankments and embankments in consideration of ecosystems has been required to protect water quality or protect the natural environment.
For this reason, natural stones are stacked on river banks, dikes, and embankments to make it easier to vegetate or to accumulate driftwood to maintain harmony with nature. However, they were not always structurally satisfactory in terms of whether they were dikes or dikes that could withstand natural disasters. Therefore, a structure has been developed in which a hollow portion is provided in a concrete revetment block so that fish and shellfish and small creatures can enter the hollow portion.
However, as a result of the need for greater harmony with nature, a multi-natural revetment that has a structure that can withstand natural disasters and is in harmony with the natural environment that takes into account the ecosystem in which a variety of living organisms can inhabit There is a need for revetment blocks for use in building structures.

[0003]

The problem to be solved by the present invention is to provide a multi-natural type revetment structure in harmony with the natural environment in consideration of various ecosystems as described above,
Revetment blocks used in these constructions, especially for revetments that have a structure with excellent strength as a whole when they are stacked, and that take into account the ecosystem where various organisms can inhabit Is to provide a block.

[0004]

According to the first aspect of the present invention, a square front wall plate 7 and a square front wall plate 7 are provided on a seawall slope 4 including a river bottom and a water body 5. A stilt 8 extending perpendicularly from the rear surface and a retaining wall plate 9 attached to the rear end and parallel to the front wall plate 7, projecting in one corner 10 of the front wall plate 7 in the same plane and in a diagonal direction 11. Each of the concave portions 1 having the same shape as the tip shape 17 and the both side shapes 18 of the protruding portion 12 is formed in the portion 12 and the remaining three corners 14, 15, and 16.
9, a through-hole 29 penetrating the front wall plate 7 rearward, and a revetment block 2 having a recess 20 for forming a slit on each side of the front wall plate 7, and a protruding portion 12 projecting toward the end of the revetment structure. A large number of the seawall blocks 2 having no seams are arranged in the same direction, and the respective protruding portions 12 are fitted into the respective concave portions 19 of the upper adjacent seawall block 2, and the seawall slopes 4 of the back wall back 24 are fitted to the seawall slopes 4. Gravel 2
5 or burial stones are laid with backing 27, and the through holes 2 formed around the dependent legs 8 between the front wall slab 7 and the retaining wall slab 9 and in the front wall slab 7
An ecosystem-friendly seawall structure 1 characterized in that gravel 25 is stuffed into a slit 31 formed between the interior wall 9 and the front wall plate 7 of the adjacent seawall 2.

According to the second aspect of the present invention, the embankment block 2 has a cruciform shape in which the retaining wall plate 9 has an insert hole 21 and an insert groove 22 arranged in a cross shape, and the insert hole 21 and the insert groove of the retaining wall plate 9 are provided. The revetment structure 1 in consideration of the ecosystem according to the means of claim 1, wherein an insert 23 is inserted into the revetment 22, and a space between the retaining wall plates 9 of the adjacent revetment block 2 is continuously provided.

According to the third aspect of the present invention, the revetment block 2 has a gravel adhesion layer 39 formed on the wall surface of the front wall plate 7 in consideration of the ecosystem in the means of the first or second aspect. It is a revetment structure 1.

According to the fourth aspect of the present invention, the revetment block 2 is composed of a thick wall 32 whose dependent legs 8 project over a pair of opposite sides of the front wall slab 7, and a wall side portion 36 of the thick wall 32. Has a recessed portion 34 that forms a gap between the slab 8 of the revetment block 2 adjacent to the slab and the square wall is formed on the wall surface 38 of the thick wall 32 on the other set of opposite sides of the front wall slab 7. The revetment structure 1 in consideration of an ecosystem according to any one of claims 1 to 3, which has 37.

According to the fifth aspect of the present invention, there is provided a front wall plate 7 made of a square thick plate, a dependent leg 8 extending perpendicularly from the back surface thereof, and a stay wall plate 9 at the rear end of the dependent leg parallel to the front wall plate 7. , One of the front wall plates 7
A half-plate thickness projection 12 of the front wall slab 7 projecting diagonally 11 from the corner 10 is flush with the other three corners 14, 15, 16 of the front wall slab 7. Tip shape 17
And the front wall plate 7 has a through-hole 29 reaching the gap between the front wall plate 7 and the retaining wall plate 9. An embankment-friendly seawall block 2 having a recess 20 for forming a slit recessed from four sides of the plate 7 toward the center.
It is. That is, the revetment block according to the first aspect of the present invention does not have a protruding portion protruding toward the end of the revetment structure.

According to the invention of claim 6, the front wall slab 7 has a projection 12 projecting from one corner 10 thereof in a diagonal direction 11 and protruding from any one side of the front wall slab 7 and an extension thereof. The revetment block 2 in consideration of the ecosystem according to the means of claim 5, wherein a part thereof is cut off.

According to the invention of claim 7, the front wall slab 7 has one corner 10
6. A revetment block 2 in consideration of an ecosystem according to claim 5, wherein a projecting portion 12 projecting in a diagonal direction 11 is cut off. That is, it is a revetment block having no projecting portion protruding toward the end of the revetment structure according to the first aspect of the present invention, and the end of the revetment structure in this case refers to a corner of the revetment structure.

According to the eighth aspect of the present invention, the retaining wall plate 9 is a square 1
3 are cut out at the four corners to form a cross shape,
8. An embankment-friendly seawall block 2 according to any one of claims 5 to 7, wherein an insert hole 21 for inserting an insert 23 and an insert groove 22 are formed.

In the ninth aspect of the present invention, the front wall slab 7 has a gravel adhesion layer 40 on the front wall surface 39 of the slab. Block 2.

In the tenth aspect of the present invention, the dependent leg 8 has a rectangular wall 37 in the retaining direction 33 at the center of the wall surface, and the wall side portion 36 has a recessed portion 34 narrower than the diameter of the retaining wall plate 9. A revetment block in consideration of an ecosystem according to any one of claims 5 to 9, characterized by comprising 32.

[0014]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a part of a seawall structure in which an embankment block in consideration of an environment suitable for aquatic life and an environment on a dike according to the present invention is laid. FIG. 2 is an explanatory view partially showing the front structure of the seawall structure. FIG. 3 is a view of the revetment block viewed from the front side of the front wall slab. FIG.
FIG. 4 is a view of the revetment block viewed from the back side of the retaining wall plate, which is the back side of FIG. 3. FIG. 5 is a view seen from the front of the front wall plate of the seawall. FIG. 6 is a view as seen from the back surface of the retaining wall plate of the revetment block. FIG. 7 is a cross-sectional view taken along line BB of FIG. FIG. 8 is a sectional view taken along the line AA of FIG.

The revetment block 2 according to the present invention is laid on the floor of a river, a lake, a shore and a shore (hereinafter referred to as a “river”) and on the slope of a levee 3 including a shore water area 5. 1 are formed. The revetment structure 1 in consideration of the ecosystem of the present invention, for example, is constructed on the revetment slope 4 of the riverbank embankment 4 by performing an empty masonry construction method for backfilling gravel 25 or crushed stone as a backfill material. Seawall 2
Is placed. These revetment blocks 2 have their projections 12 all oriented in the same direction, and these projections 12 are fitted into the concave portions formed by the respective partial concave portions 19 of the adjacent revetment block 2. The rebar inserts 23 are inserted into the longitudinally formed insert holes 21 and the horizontally formed insert grooves 22 of the retaining wall slab 9 of the revetment block 2 to be engaged with each other, and are strongly connected to each other. ing.

In this continuous installation, an end revetment block 2a to be laid at the end of the revetment structure 1 is used without a protrusion projecting toward the end of the revetment structure 1.
In particular, the corner revetment block 2b used at the corner of the revetment structure 1 is composed of a revetment block 2 completely lacking a protrusion 12 projecting in a diagonal direction 11 from one corner 10 of the front wall slab 7 constituting the surface. Use what is.

The revetment block 2 has a through hole 2 extending from the surface of the front wall slab 7 to the periphery of the dependent leg 8 in the holding direction 33.
7 are formed. In the revetment structure 1 of the present invention, the gravel 25 is stuffed 30 around the dependent leg 8 which is a gap between the through hole 27, the front wall plate 7, and the retaining wall plate 9. Further, the shape of the front wall plate 7 of these seawall blocks 2 is a square 13. The four sides of the front wall slab 7 which are the squares 13 are formed in recesses 20 which are recessed toward the center from the respective sides. Is formed with a slit 31. The gravel 25 is also contained in the slits 31 on the four sides on the side of the front wall slab 7. In addition, the retaining wall version 9 of the revetment block 2
Has a cross shape with four corners cut out. Therefore, in the cut-out portions at the four corners, the gravel 25 with the backfill 30 is integrated with the gravel 25 with the backfill 27.

Further, gravel 25 is adhered to the front wall surface 39 of the front wall plate 7 of each seawall block 2 of the seawall structure 1 by mortar or the like, and the surface is formed on a gravel adhesion layer 40 whose surface is a granular surface of gravel. Have been.

Next, an embodiment of the revetment block 2 of the present invention used in the construction of the revetment structure 1 will be described. The revetment block 2 has a front wall slab 7 made of a thick plate of a square 13 at the front. The front wall plate 7 has a dependent leg 8 extending vertically from the center of the back of the front wall plate 7 in the retaining direction 33, and further has a retaining wall plate 9 at the rear end of the dependent leg 8 parallel to the front wall plate 7. A projection 12 having a half-plate thickness of the front wall slab 7 projecting from one corner 10 of the front wall slab 7 in a diagonal direction 11 is provided on the same plane as the front wall slab 7. The remaining three corners 1 of the square front wall plate 7
4. The corners 15 and 16 have respective concave portions 19 having the same shape as the shape of the tip portion 17 and the side portion 18 of the protruding portion 12, respectively. Further, a through hole 29 reaching the gap between the front wall slab 7 and the siding wall slab 9 is formed from the front surface of the front wall slab 7 to the back of the front wall slab 7. Further, the four sides of the front wall slab 7 are recessed portions 2 which are recessed from the four sides toward the center to form slits 31 between the sides of the adjacent front wall slab 7.
0 is formed.

Further, in the block 2a for the end revetment structure arranged at the end of the revetment structure 1, the front wall plate 7 is formed of the projection 12 protruding from one corner 10 in the diagonal direction 11 of the front wall plate. 7, one side of the front wall slab 7 on the end side of the seawall structure 1 and a protruding portion protruding from an extension thereof are cut out. The structure of the remaining three corners 14, 15 and 16 of the end revetment structure block 2a and other structures are the same as those of the revetment structure block 2 having the above-described normal-shaped projection 12, and are the same. It has a structure.

Further, in the corner revetment structure block 2b arranged at the corner of the revetment structure 1, the front wall slab 7 has all the protruding portions 12 protruding from the one corner 10 in the diagonal direction 11 cut out. The protruding portion 12 is not formed, and the structures of the other three corners 14, 15, 16 and other structures are the same as those of the above-described block 2 for revetment structure, without being different. .

In the revetment structure block 2, the end revetment structure block 2a, and the corner revetment structure block 2b, the shape of the retaining wall plate 9 is a cross shape in which four square corners are cut out. I have. And these slabs 9
In the cross shape, an insert hole 21 for inserting an insert 23 made of a reinforcing bar and an insert groove 22 are formed so as to be perpendicular to each other. In particular, as shown in FIG. 8, the insert hole 21 penetrates the retaining wall plate 9, and the retaining wall plate 9 insert hole of the adjacent seawall structure block 2 in which the long inserts 23 are connected in the same direction. 21 can be inserted. On the other hand, as shown in FIG. 4, the insert groove 22 is formed in a groove shape at one end of the cruciform retaining wall plate 9, and the insert 23 of the short reinforcing bar is simply provided by the retaining wall of the adjacent revetment structure block 2. It is fitted between the insert groove 22 of the plate 9 and is continuously provided. Since the short inserts 23 are mounted only in the insert grooves 22 between the revetment structure blocks 2 adjacent to each other, first, the revetment structure blocks 2 are successively provided in a direction in which the long inserts 23 are mounted, and then they are connected. Similarly, a long insert 23 is inserted into the insert hole 21 of the retaining wall block 9 of the revetment structure block 2 on the side of the array, and the array is continuously provided. At this time, when connecting the adjacent rows, a short insert 23 is inserted into the insert groove 22 of the retaining wall plate 9 of the adjacent seawall structure block 2 and fixed with mortar to join the adjacent rows. Go. By repeating this, the laying in which all the seawall structural blocks 2 are arranged is completed. As described above, the revetment structure 1 in which the whole is integrally fixed can be easily laid.

Referring to FIG. 1, the end revetment blocks 2a are arranged in order from the lower right corner revetment block 2b. At this time, the long insert 23 is inserted and joined while the projection 12 of the upper end revetment block 2a is fitted into the partially concave portion 19 of the lower end revetment block 2a. Next, the long seawall blocks 2 in the second row from the right are similarly joined by inserting the long inserts 23 while fitting the protruding portions 12 sequentially from the lower stage to the upper stage. A short insert 23 is mounted between the insert grooves 22 of the retaining wall slab between the rows and fixed with mortar. In this way, the procedure proceeds sequentially to the left column to complete the laying. Of course, at the time of this laying, gravel 25 is crammed 30 into each seawall block 2. As shown in FIG. 2, the gravel 25 is also inserted into the through holes 29 formed in the front wall slab 7, and the gravel 25 is also inserted into the slits 31 formed between adjacent sides of the front wall slab 7. Shall be included.

Further, in another embodiment, the revetment block 2 is formed by attaching gravel to the front wall surface 39 of the front wall plate 7 of the revetment block 2 with mortar to form a gravel adhesion layer 40. A gravel adhesion layer 40 is formed on the entire surface of the structure 1. This is done by attaching the gravel to the front wall surface 39 of the front wall plate 7 with mortar and constructing the revetment structure 1 using the revetment block 2 in which the gravel adhesion layer 40 is preliminarily attached, or providing the gravel adhesion layer 40 in advance. The revetment structure 1 may be constructed by using the revetment block 2 which is not provided, and the gravel 25 may be adhered to the surface of the revetment structure 1 by mortar on the surface of the revetment structure 1 in the final stage to form the gravel adhesion layer 40. In addition, revetment block 2
By appropriately forming irregularities on the surface of the soil, earth and sand can easily be naturally put on the surface, and plants can easily prosper. Needless to say, the surface may be replaced with a gravel-adhering layer 40 and a stone-cut pattern may be provided.

The dependent legs 8 integrally formed in the holding direction 33 from the back of the front wall slab 7 of the seawall block 2 have a thick wall 32.
Formed from In the centering direction 33 of the wall surface 38 of the thick plate wall 32, an angled square 37 is formed. Further, the wall side portion 36 of the thick plate wall 32 is formed in the embankment block 2 as a concave portion 34 having a width smaller than the diameter of the retaining wall plate 9. The formation of the mountain-shaped ridges 37 in this manner increases the strength of the dependent legs 8, reduces the weight of the revetment block 2, facilitates the transport of the pre-produced revetment block 2, and reduces the concrete Reduce costs by reducing usage fees. In addition, the wall side portion 36 is formed as a recessed portion 34 narrower than the diameter of the retaining wall slab 9, thereby forming a recessed portion 34 in the thick wall 32 of the dependent leg 8, and the gravel 25 is inserted into this portion. Can be
When the revetment block 2 is laid in the water area 5, animals and plants can enter this portion together with water, and an area where fish and small creatures can breed can be easily formed. The above-described revetment block 2 of the present invention is an example in which the revetment block 2 is used for the revetment structure 1 laid on the revetment slope 4. Needless to say, it can also be used for flood control works such as consolidation, wave breaking, and flood control.

As described above, in the construction method of the revetment structure 1 according to the embodiment of the present invention, since the protrusions 12 are fitted to each other and are connected by the insert, the solid revetment structure 1 is provided.
Is obtained. In addition, an empty masonry method is adopted in which gravel 25 or quarry stone is backed between the retaining wall plate 9 of the revetment block 2 and the revetment slope 4, and the gravel 25 is also provided around the dependent legs in the revetment block 2. Cavities are formed in the stones and the gravel 25, and the through-holes 29 formed in the front wall slab 7 are formed.
The slit 31 formed between the front wall plate 7 of the adjacent seawall block 2 and the water barrier 6 allows air to flow in the vicinity of the water surface 6, and further forms a flow hole that generates water flow in the water area 5. The aquatic creatures such as fish, crabs, shrimp and aquatic insects enter the space, and become a suitable habitat, and also a vegetation area where small aquatic plants and other vegetation tend to prosper.
Further, since the gravel-adhered layer 40 is formed on the surface of the revetment structure 1, aquatic vegetation is formed in the water area, and soil particles are naturally piled up between the particles of the gravel-adhered layer 40 in the embankment above the water area. The shore plants thrive in the soil and are easily revegetated.The aquatic plants that thrive under the surface of the water collect fish, crab, shrimp, shellfish, aquatic insects, etc., and become habitats. Insects and small birds such as dragonflies and butterflies gather and live on the plants that flourish in the sea, forming a revetment structure 1 that is more environmentally friendly and maintains a more waterfront ecosystem.

[0027]

As described above, in the revetment structure of the present invention, the revetment block is laid by backfilling gravel and quarry stone by the empty lamination method, and the gravel is buried inside the revetment block. Since the through-holes and slits for flowing water are formed from the surface of the revetment structure to the inside, air and water flow, and fish and other aquatic organisms inhabit in the gaps created in the backfill part and the gravel that was buried. In addition, if there is a gravel-adhered layer on the surface of the seawall structure, aquatic plants and above-ground plants will thrive, and fish, crabs, shrimp, shells, aquatic insects, and other animals that gather on waterside plants will proliferate aquatic plants. It becomes a place, and the revetment structure is greened to keep the natural scenery. For this purpose, the revetment blocks are fitted with each other by protruding parts, and the reinforcing wall inserts are attached to the retaining wall slabs and connected. thing Firm has a revetment structure, and summer and seawall structure of excellent structure unprecedented in consideration of the natural ecosystems.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a part of a seawall structure in which an embankment block in consideration of an environment suitable for aquatic life and an environment on a dike according to the present invention is laid.

FIG. 2 is an explanatory view partially showing a front structure of a seawall structure.

FIG. 3 is a view of the revetment block viewed from the front side of a front wall slab.

FIG. 4 is a view of the revetment block viewed from the back side of the retaining wall plate, which is the back side of FIG. 3;

FIG. 5 is a view of the seawall block as viewed from the front of a front wall plate.

FIG. 6 is a view seen from the back surface of a retaining wall version of a seawall.

FIG. 7 is a sectional view taken along the line BB of FIG. 5;

8 is a sectional view taken along the line AA of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Revetment structure 2 Revetment block 2a Edge revetment block 2b Corner revetment block 3 Embankment 4 Revetment slope 5 Water area 6 Water level 7 Front wall version 8 Dependent leg 9 Retaining wall version 10 1 corner 11 Diagonal direction 12 Projection DESCRIPTION OF SYMBOLS 13 Square 14 corner 15 corner 16 corner 17 Tip part shape 18 Side part shape 19 Partially concave part 20 Depressed part 21 Insert hole 22 Insert groove 23 Insert 24 Retaining wall back part 25 Gravel 27 Back filling 29 Through hole 30 Body filling 31 Slit 32 Thick wall 33 Backing direction 34 Recess 36 Wall side 37 Square 38 Side 39 Front wall 40 Gravel adhesion layer

Claims (10)

[Claims] 1. A square front wall slab, a dependent leg extending perpendicularly from the rear surface thereof, and a sloping wall slab attached to a rear end thereof and parallel to the front wall slab, on a revetment slope including a river bottom and a body of water. At one corner of the wall slab, a projection projecting diagonally in the same plane, and at the remaining three corners, a rear concave portion and a front wall slab having the same shape as the shape of the tip and both sides of the projection are pierced rearward. A number of seawall blocks with a through hole and a seawall block with a recess for slit formation on each side of the front wall slab, and a number of seawall blocks without protrusions protruding toward the edge of the seawall structure Each projecting part is fitted into each part concave part of the upper adjacent seawall and the gravel or rubble is laid back on the seawall slope at the back of the deck wall, and between the front wall and the deck wall. In the slit formed between the periphery of the stilt and the front wall slab and the front wall slab of the adjacent seawall A revetment structure that takes into account ecosystems, characterized by the inclusion of gravel. 2. The revetment block has a cross-shaped slab in which an insert hole and an insert groove are arranged in a cross shape, and an insert is inserted into the insert hole and the insert groove of the siding wall plate, and a retaining wall of an adjacent revetment block is provided. The revetment structure in consideration of an ecosystem according to claim 1, wherein the wall slabs are connected continuously. 3. The revetment structure in consideration of an ecosystem according to claim 1, wherein the revetment block has a gravel adhesion layer formed on a wall surface of the front wall slab. 4. The revetment block has a stilt of one of the front wall version.
The slab of the front wall slab has a thick wall 32 protruding on the opposite side of the set, and has a recessed portion that forms a gap between the side wall of the thick wall 32 and the dependent leg of the revetment block. The ecosystem-friendly seawall according to any one of claims 1 to 3, wherein the wall of the thick plate body 32 on the other set of opposite sides has a rectangular stripe. 5. A front wall slab made of a square plank, a dependent leg extending perpendicularly from the rear surface thereof, and a stay wall slab parallel to the front wall slab at the rear end of the dependent slab, and from one corner of the front wall slab. A projection having a half-plate thickness of the front wall slab protruding diagonally is provided on the same plane, and the remaining three corners of the front wall slab are formed with the tip shape and the two side shapes of the projection. A recess for forming a slit, which has a partially concave portion of the same shape, has a through hole in the front wall plate that reaches the gap between the front wall plate and the retaining wall plate, and is recessed in the center from four sides of the front wall plate. An ecologically friendly seawall block with an entrance. 6. The front wall slab is characterized in that one of the protrusions projecting diagonally from one corner thereof has a cutout protruding from any one side of the front wall slab and an extension thereof. The edge revetment block in consideration of the ecosystem according to claim 5. 7. The revetment block in consideration of an ecosystem according to claim 5, wherein a projecting portion projecting diagonally from one corner of the front wall slab is cut off. 8. The siding wall plate is formed in a cross shape by cutting out four corners of a square, and has an insert hole and an insert groove for mounting an insert in the siding wall plate. 8. A revetment block in consideration of the ecosystem according to any one of items 7 to 7. 9. The revetment block in consideration of an ecosystem according to any one of claims 5 to 8, wherein the front wall slab has a gravel adhesion layer on a front wall surface thereof. 10. The dependent leg comprises a thick wall 32 having a rectangular shape in the center direction of the wall surface and having a recessed portion whose side portion is narrower than the diameter of the slab wall. 10. A revetment block in consideration of the ecosystem according to any one of items 9 to 9.