JPH09165730A - Bed protection block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect a river, by providing radial connection passages connected to the outside, in a vertically piercing hole and partly covering the vertical hole with a covering body. SOLUTION: A number of bed protection blocks A are laid on a river bed. Since a passage way 5 is opened at the bottom, the water stream in the pieced hole flows at a slower speed. And since a covering body (b) is set at the upper part of the upper stream side in the vertical hole space constituted of forming parts 2 of the peripheral vertical hole spaces and a forming part 3 of the vertical hole space, sand and gravel are prevented from settling from the vertical holes onto the river bed. Since the vertical hole is partly closed with covering bodies (b), (c), the water stream in the vertical hole is less disturbed and hence, scoring of the river bed or settling of sand and gravel on the river bed is prevented. The covering bodies decrease the opening plan area of the vertical hole and the space slanting rearward formed between the covering bodies (b), (c) is made to form a light-transmission hole 15 and further, the space connected to the hole 15 and the passage way 5 is formed as an ecologically protective space. In this way, scoring or settling of sand and gravel can be prevented and also the ecological system can be protected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor protection block for scour / accumulation prevention.

[0002]

2. Description of the Related Art Conventionally, in general, a large number of protection blocks are continuously connected and laid downstream of a weir in order to protect a riverbed.

[0003] Then, a cutout portion is provided in each floor protection block to form a cavity surrounded by the floor protection block by each cutout portion, and the cavity portion is opened vertically and sideways. It reduces the resistance from running water and allows it to be used as a fish nest.

[0004]

However, in the above-mentioned protection bed block, when a large-scale flood occurs, the riverbed in the laying section of the protection bed block is scourd, and the protection bed line is removed from the riverbed. When the scouring progresses, it becomes cracked due to the dead weight of the protection floor block itself, and the protection floor block loses its protection function.

[0005] Further, since gravel and the like are deposited on the cavity of the floor block and the cavity is blocked, the resistance received from running water increases, and from this point, the row of the floor blocks that are laid down in order is also river bed. There is a problem that it becomes difficult to perform the bed protection function away from.

[0006]

In order to solve the above problems, therefore, in the present invention, a vertical hole space that penetrates in the vertical direction and a communication passage that extends in the radial direction by the vertical hole space and communicates with the outside. By providing a shield body that partially shields the vertical hole space in the body of the bed block, the river bed in the laying section of the bed block is prevented from being scoured, and the inside of the bed block is provided. It is designed to prevent the accumulation of gravel and the like.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention particularly relates to a guard floor block laid and used on a river bed, and the guard floor block includes a vertical hole space that vertically penetrates and a vertical hole space. The floor guard block main body having a communication passage extending in the radiation direction and communicating with the outside is provided with a shield that partially shields the vertical hole space.

Further, the bed guard according to the present invention comprises an upper layer portion mainly having a bed guarding function, and a lower layer portion which supports the upper layer portion and mainly has a function of protecting and nurturing an ecosystem of fish and algae. The main body of the floor block is formed from the above, and the light passage hole that penetrates in the up-down direction is formed in the upper layer, and the light passage hole is in the lower position on the upstream side and in the higher position on the downstream side. On the other hand, in the lower layer, an ecosystem protection space that communicates with the light passage hole is formed wider in the front and back than the light passage hole, and the periphery of the light passage hole is formed as an ecosystem protection space. This is a shield that partially shields the vertical hole space formed by the light passage hole, and further has a communication path extending from the ecological protection space in the radiation direction to communicate with the outside.

Here, the upper layer portion has a function of protecting the floor particularly during flooding, and has a function of promptly flowing down the flood.

On the other hand, in the lower layer, the ecosystem protection space and communication passages provide a habitat space for fish and algae, protect and nurture the ecosystem and purify water quality. Moreover,
The vertical hole space and the space of the passageway come into contact with the natural riverbed, and in order to secure a gentle flow of water, it is possible to secure a habitat space for aquatic animals even when the river has a small flow rate and low water level. Evacuation sites can be provided for aquatic animals even during floods.

The guard floor block main body is formed in a regular polygonal shape in plan view, a vertical hole space is formed in the central portion of the floor guard block main body, and a communication passage is formed from the vertical hole space toward the peripheral corners. It is also possible to form the communication passage or to form the communication passage from the vertical hole space toward the peripheral side portion. In this case, the vertical hole spaces formed in the adjacent guard blocks can be communicated with each other through the communication passages.

Here, the shape of the floor protection block main body in plan view may be a regular polygon, and examples thereof include a regular triangle, a square, a regular pentagon, and a regular hexagon.

Further, it is possible to form a peripheral vertical hole space forming portion which penetrates in the up-down direction and communicates substantially perpendicularly to the tip opening portion of the communication passage around the periphery of the floor protection block body.

In this case, when a plurality of floor protection blocks are continuously and orderly laid, a plurality of peripheral vertical hole space forming portions are assembled to form one peripheral vertical hole space.

Therefore, when a plurality of peripheral vertical hole space forming portions are formed in one guard bed block, a plurality of such peripheral vertical hole spaces are formed around the vertical hole space formed in the guard bed block. It will be.

A peripheral communication passage forming groove extending in a substantially horizontal direction along the side surface can be formed on the side surface of the floor protection block body.

In this case, the peripheral communication passages can be formed by the peripheral communication passage forming grooves of the adjacent floor protection blocks.

A peripheral vertical hole space forming portion that penetrates in the vertical direction and communicates substantially perpendicularly to the end of the peripheral communication passage forming groove can be formed in the periphery of the floor protection block body.

In this case, the peripheral communication passages can be formed by the peripheral communication passage forming grooves formed in the adjacent floor protection blocks, and the peripheral vertical hole space forming portions are gathered at the ends of the peripheral communication passages. A peripheral vertical hole space can be formed.

Around the periphery of the floor protection block body, an adhesive filling hole forming portion having an opening on the upper surface side and the side surface side can be formed.

In this case, the adhesive filling holes can be formed by the adhesive filling hole forming portions respectively formed in the adjacent floor blocks, and the adhesive filling holes are filled with an adhesive such as concrete or mortar. As a result, the adjacent protection bed blocks can be firmly connected to each other, and a plurality of protection bed blocks laid on the riverbed or the like can be integrated.

The shield partially shields the vertical hole space and / or the peripheral vertical hole space formed by a plurality of peripheral vertical hole space forming portions. It is also possible to partially block at least one of the upstream side and the downstream side, or to dispose on the upper surface of the floor protection block body to partially block the upstream side.

The shield that partially shields the upstream side of the vertical hole space or the peripheral vertical hole space can form an inclined upstream side inclined surface having a front low rear high in a side view.

On the other hand, the shield which partially shields the downstream side of the vertical hole space or the peripheral vertical hole space can form an inclined downstream side inclined surface having a front low rear high in a side view. .

In this case, a sufficient amount of light is inserted into the ecological protection space formed in the vertical hole space from the light transmitting hole which is the upper end opening of the vertical hole space, and the vertical hole space is also provided. A shield that partially shields the upper part of the river prevents a large amount of river water from flowing into the ecological protection space through the light passage hole, creating a turbulent flow and preventing the river bed from being scourd. In addition to being able to prevent it, it is possible to prevent gravel and the like from flowing in through the light passage hole together with running water and accumulating on the riverbed in the ecosystem protection space.

Even in the peripheral vertical hole space formed by gathering a plurality of peripheral vertical hole space forming portions, the same structure as the above vertical hole space is provided by the shield for partially shielding the upper portion of the peripheral vertical hole space. In addition, it is possible to prevent scouring of the river bed and prevent accumulation of sand and gravel on the river bed.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The first to third embodiments of the present invention will be specifically described below with reference to the drawings.

[First Embodiment] A shown in FIGS. 1 to 7 is a protection bed block as a first embodiment. The protection bed block A is a protection bed formed from an upper layer portion a1 and a lower layer portion a2. Floor block body a and vertical hole space 8 formed in the same floor block body a
And shields b and c that partially shield the.

As shown in FIGS. 1 and 2, a large number of guard bed blocks A are laid in order on the river bed K in the front-rear, left-right direction to form a guard bed block group G.
The floor protection block A having the floor plate B attached to the lower surface thereof is arranged only on the most downstream side of the above to form the floor protection block row L.

As shown in FIGS. 3 to 7, the floor protection block body a has a fan shape surrounded by arcs of equal diameter centered on the four vertices of the basic square 1 shown by the alternate long and short dash line. The peripheral vertical hole space forming part 2 formed, the vertical hole space forming part 3 formed in a circular shape having the same radius as the peripheral vertical hole space forming part 2 centering on the central part of the square 1, and the four sides of the square 1 It has a planar shape in which a small vertical hole space forming portion 4 formed in a small diameter semicircular shape centered on each point is cut out, and based on this planar shape, three-dimensionalized in the height direction, and on the lower surface, In the radial direction of the vertical hole space forming portion 3, the vertical hole space forming portion 3 is communicated with each peripheral vertical hole space forming portion 2 and a communication path 5 having an open lower side is formed.

In this way, as shown in FIG. 1, a vertical hole space 8 which serves as a central vertical and vertical communication is formed in the vertical hole space forming portion 3 formed in the central portion of the floor protection body a. In addition, when the guard floor block body a is laid in an orderly manner in the front, rear, left and right directions, the four neighboring vertical hole space forming portions 2, 2, 2, 2 provide a peripheral area of the same size as the vertical hole space 8. Vertical hole spaces 8'are formed one by one around the vertical hole space 8 in total, and one small vertical hole space 9 is formed by two adjacent small vertical hole space forming portions 4 and 4. I have to.

Since the communication passage 5 is also opened downward, the flowing water flowing in the communication passage 5 flows gently on the river bed K, and a plurality of protection beds A are provided. When these are stacked, a space portion can be formed between the protection floor blocks A, A by the communication passages 5, 5, and running water can flow into the vertical hole space 8 through the space portion. .

In this embodiment, the radius of the vertical hole space forming portion 3 is set equal to the radius of the peripheral vertical hole space forming portion 2, but the radius of the two may be different without being restricted by this. Of course good things.

Further, reinforcing bar 6 is embedded inside the floor protection block main body a, and the reinforcing bar 6 is formed into an annular shape as shown in FIGS. 4 and 8. Protrusions 7 projecting outward are attached at four locations in the circumferential direction. As shown in FIGS. 4 to 6, the protrusion 7 is exposed in the space inside the small vertical hole space forming portion 4. This exposed protrusion 7 may be used to hang wires and
It is used for hoisting. In addition, the floor protection block body a can also be carried by suspending a wire on the vertical hole space forming portion 3 or the peripheral vertical hole space forming portion 2.

As shown in FIG. 4, the small vertical hole space 9 has a projection 7 facing it, and adjacent protection floor block bodies a are mutually connected through the projection 7 to connect the fitting 10 shown in FIG. The connecting tool 10 is formed into a column having a diameter corresponding to the size of the small vertical hole space 9, and its height is formed to be the same as the height of the floor block body a. The recess 11 is formed to a height corresponding to the protrusion 7.

The shield b is, as shown in FIGS.
It is arranged on the upstream side of the vertical hole space 8 formed in the vertical hole space forming portion 3 formed in the floor protection block body a and at the upper position, and on the upstream side peripheral surface of the vertical hole space forming portion 3. An arc-shaped upstream peripheral surface b1 that makes surface contact with a half-moon-shaped upper surface b2 in plan view
And a slanted columnar body formed from a slanted upstream-side slanted surface b3 having a front low rear high.

At the upper position of the peripheral vertical hole space forming portion 2 formed on the upstream side of the floor protection block body a, as shown in FIGS. 3 to 7, the above-mentioned shield b is divided into two parts, left and right. When the shield half-part b ′ formed by arranging is placed and four guard floor block bodies a, a, a, a are laid in order, four peripheral vertical hole space forming portions 2, 2, 2, 2 are formed. A pair of left and right shield half-parts b ', b'are arranged adjacent to each other on the upstream side of the peripheral vertical hole space 8'formed by 2 and at the upper position so as to form the shield b. ing.

As shown in FIGS. 3 to 7, the shield c is located downstream of the vertical hole space 8 formed in the vertical hole space forming portion 3 formed in the floor protection block body a, and An arc-shaped downstream side peripheral surface c1 that is arranged at a lower position and is in surface contact with the downstream side peripheral surface of the vertical hole space forming portion 3, and a half moon-shaped lower surface in bottom view.
The slanted columnar body is formed by c2 and a slanted downstream side slanted surface c3 having a front low rear height in a side view.

At the lower position of the peripheral vertical hole space forming portion 2 formed on the downstream side of the floor protection block main body a, as shown in FIGS. When the shield half blocks c ′ formed by arranging are placed and four guard floor block bodies a, a, a, a are laid in an orderly manner, four peripheral vertical hole space forming portions 2, 2, 2, A pair of left and right shield half-parts c ', c'are arranged adjacent to each other at the lower side of the peripheral vertical hole space 8'formed by 2 to form the shield c. ing.

Here, in the present embodiment, each vertical hole space 8,
The upper position of 8 ′ means a position close to the upper surface of the floor block body a, and the lower position of each vertical hole space 8, 8 ′ means a position close to the communication passage 5.

As described above, by providing the shields b and c in the vertical hole spaces 8 and 8 ', respectively, the planar opening area of the vertical hole spaces 8 and 8'can be reduced, and the shields b and c can be reduced. A rearwardly inclined space formed between the light passage holes 15 and the light passage hole is formed.
A space communicating with the lower part of 15 and also communicating with the communication passage 5 is defined as an ecosystem protection space 16.

In this way, the sunlight can be taken into the ecosystem protection space 16 through the light-transmitting hole 15, and
The scouring of the river bed K, which will be described later, and the accumulation of deposits on the river bed K can be prevented.

As shown in FIG. 10, the floor board B is formed in a square plate shape, and the peripheral vertical hole space forming portion 2, the vertical hole space forming portion 3 and the small vertical hole space forming portion formed on the floor protection block body a. The lower part of the portion 4 and the communication passage 5 is closed.

The floor block A and the floor board B are made of concrete, respectively.
The floor protection block main body a and the shields b and c are integrally formed. The material of the protection floor block A and the floor board B is not limited to concrete, and synthetic resin or the like can be used.
Further, the floor guard block main body a and the shields b and c may be formed separately, and the shield bodies b and c may be attached to the floor guard block main body a by an adhesive agent or the like.

The embodiment of the present invention is constructed as described above, and when the river bed K is protected by the bed block A according to this embodiment, the bed block A is placed on the river bed K.
As shown in FIG. 1 and FIG. 2, the guard floor block group G is formed by orderly laying in the front-rear, left-right direction, and the floor board is provided only on the most downstream side of the guard floor block group G on the lower surface of the guard floor block A. Arrangement with B attached in the left-right width direction to protect floor block row L
Is formed.

In this way, the floor guard block A blocks the vertical hole spaces 8 formed in the peripheral vertical hole space forming portion 2 and the vertical hole space forming portion 3 formed in the floor guard block body a from the shield b,
When partly shielded by c, the protection bed block A is laid on the river bed K in an orderly manner, the turbulence of the flowing water in each vertical hole space 8 is reduced, and the river bed K by the same flowing water is reduced. It is possible to prevent the scouring and the accumulation of gravel and the like on the river bed K, and it is possible to satisfactorily secure the protection of the river bed K by the protection bed block A.

Therefore, it is possible to raise the flood control of the river, protect the ecosystem of the river, function as a hideout for aquatic animals by forming a shade, and raise the aquatic animals.

That is, the shield b is provided on the upstream side of the vertical hole spaces 8 and 8'formed in the vertical hole space forming portion 3 and the peripheral vertical hole forming portion 2 formed in the floor protection block body a, respectively. In addition, since it is arranged at the upper position, the shield b
Thus, it is possible to prevent gravel and the like from being deposited on the river bed K through the vertical hole spaces 8 and 8 '.

At this time, the shield b is the floor protection block body a.
A circular arc-shaped upstream peripheral surface that makes surface contact with the upstream peripheral surfaces of the vertical hole space forming portion 3 and the peripheral vertical hole space forming portion 2
Since the slanted columnar state is formed by b1, a half-moon-shaped upper surface b2 in a plan view, and an inclined upstream side inclined surface b3 having a front low rear height in a side view, the shield b Vertical hole space 8
The upper surface of the upstream side can be largely shielded, and it is possible to reliably prevent the gravel and the like flowing from the upstream side from depositing on the river bed k through the vertical hole space 8.

Further, since the upstream inclined surface b3 of the shield b is formed in an inclined shape of front low rear high, in the vertical hole space 8 the gravel which has begun to flow from the lower side of the upstream side to the upper side of the downstream side. Etc.
The light is reflected downward on the downstream side by the upstream inclined surface b3. Therefore, it is possible to prevent the river bed k from being scourd and the gravel and the like from flowing out through the vertical hole space 8.

On the other hand, the shield c is provided on the downstream side of the vertical hole spaces 8 and 8'formed in the vertical hole space forming portion 3 and the peripheral vertical hole space forming portion 2 formed in the floor protection block body a, respectively. In addition, since it is arranged at the lower position, the shield c
Thus, it is possible to prevent the river bed k from being scoured through the vertical hole spaces 8 and 8 '.

At this time, the shield c is the floor protection block body a.
Arc-shaped downstream side peripheral surfaces that are in surface contact with the downstream side peripheral surfaces of the vertical hole space forming portion 3 and the peripheral vertical hole space forming portion 2 respectively formed in
c1 and a lower surface c2 that forms a small vertical hole space in bottom view, and a slanted columnar body that is formed from a front-side, rear-side, lower-side inclined surface c3 in a side view, and thus has the same shielding The lower part of the downstream side of each vertical hole space 8, 8 ′ can be largely shielded by the body c, and the river bed k is scourd through each vertical hole space 8, 8 ′ so that gravel or the like is removed in each vertical hole space 8, 8 ′. It is possible to reliably prevent the liquid from flowing out through ′.

In addition, since the downstream inclined surface c3 of the shield c is formed in an inclined shape of front low rear high, each vertical hole space 8,
Gravels and the like, which have started to flow into 8'from above on the upstream side, tend to flow out toward above on the downstream side along the downstream inclined surface c3. Therefore, the deposition rate of gravel and the like on the river bed k also becomes small.

The floor guard block A forming the row of guard floor blocks L is connected to the peripheral vertical hole space forming portion 2, the vertical hole space forming portion 3 and the small vertical hole space forming portion 4 formed in the floor guard block body a. Since the lower part of the passage 5 is closed by the floor plate B, the sediments and the like of the river bed K located immediately below these are closed by the communication passage 5
It is possible to prevent the water from being moved by the flowing water flowing in through, etc., and to prevent scouring over the entire width of the river bed K. For this reason, it is possible to prevent breakage of the protective floor block group G due to scouring.

Adjacent floor block A is connected by a connecting tool.
Using 10 is done as follows. That is, after arranging the bed blocks A as shown in FIGS. 1 and 2, the connector 10 is inserted into the small vertical hole space 9 formed by the small vertical hole space forming portion 4. At this time, the projection 7 protruding into the small vertical hole space 9 is fitted into the concave portion 11, and the projection 7 is arranged at the upper end of the concave portion 11 when the connecting tool 10 is completely accommodated in the small vertical hole space 9. To be done.

As a result, there is no movement between the protection floor blocks A. In addition, the adjacent floor protection block A
That is, together with the weight of the protection floor block A itself, the protection floor block group G arranged as shown in FIGS. 1 and 2 is fixed.

Then, in the floor protection block A of this embodiment, by simply inserting the connecting tool 10 into the small vertical hole space 9,
Since the group of revetment blocks G can be fixed, construction of revetments, erosion control, etc. becomes very easy.

Moreover, even if the protection floor blocks A are stacked in several stages in a stable state, the overall stability does not deteriorate at all, and in the state where the protection floor blocks A are stacked in the vertical direction, the communication passage 5 is filled with running water. Becomes a passage for guiding the vertical hole space forming portion 3 to reduce the resistance of running water. In this stacking, when the first-stage floor protection block A is arranged in the state shown in FIG. 2 and the second-stage floor protection block A is arranged upside down, the vertically adjacent floor protection blocks A are arranged. , A of the communication passages 5 and 5 form a space twice as large as the space formed by one communication passage 5, so that the flow resistance is further reduced. Further, by forming the corner portion of the communication passage 5 to be round, it becomes possible to prevent scratches when a human body touches the corner portion.

After fixing the floor block A in this way, it is advisable to put rubble stones in the vertical hole spaces 8 and 8 '. When the sludge on the seabed or the riverbed flows into the vertical hole spaces 8 and 8'of the floor block group G due to the flow of water, the stones act as a filter and have a role of purifying running water. Further, when filling the vertical hole spaces 8, 8 ', etc. with a filler such as limestone, activated carbon, etc., purification of pesticide sewage, urban sewage, etc. is performed.

At this time, the shield b disposed on the upper side of the upstream side of each vertical hole space 8 and 8'and the shield c disposed on the lower side of the downstream side.
By this, the filling material filled in the vertical hole spaces 8 and 8'can be prevented from flowing out, and the both shields b and c also function as such filling material flowing-out preventing means.

Further, if this protection floor block group G is laid on the riverbed, the seabed, etc., the vertical passage spaces 8, 8
Water flows freely in 8 '. Therefore, these vertical hole spaces 8 and 8'can be used as fish nests. At this time, if an earth or sand mixed with organic matter or its corrosive matter is laid in each vertical hole space 8 or 8 ′, an environment suitable for habitation, spawning and hatching of shrimp, crab, seafood and microorganisms is created. Can be made.

Furthermore, the structural strength of the floor protection block group G can be improved by vegetating bamboo, turf or the like in each vertical hole space 8, 8 '.

Further, since the revetment block A of the present invention has a stable shape, it is safe when it is constructed into a structure such as a revetment or erosion control, or when it is stored in piles. Is also excellent.

The floor protection block row L is not limited to one row, but a plurality of rows can be formed to secure the scour prevention effect.

Further, in the above embodiments, the case where the floor block A is laid on the riverbed, the seabed, etc. has been described, but it is not restricted by this and can be used for various purposes such as construction of runways and residential areas. It can also be used as a block for civil engineering work.

Next, with reference to FIGS. 11 to 17, a bed protection block A as a modification of the first embodiment will be described.

That is, in the floor protection block A as the first modification shown in FIG. 11, a ring-shaped shield b having an outer diameter equal to the inner diameter of the vertical hole space forming portion 3 is provided at the upper position of the vertical hole space 8. And the four peripheral vertical hole space forming parts 2, 2,
Quarter-shaped shield b4, b4, b4, b at the upper position of 2,2
4 are provided.

In such a floor block A, the shields b, b4
By reducing the open area of the vertical hole space 8,
The deposition preventing effect can be increased.

A floor protection block A as a second modification shown in FIG. 12 is located on the upstream side of the vertical hole space 8 and at the upper position.
A half-moon shaped shield b is provided, and shield half halves b ′ and b ′ are formed by dividing the shield b into left and right parts at upper positions of the peripheral vertical hole space forming parts 2 and 2 located on the upstream side. Is provided.

In the floor guard block A, the deposition preventing effect can be increased by reducing the open area of the vertical hole space 8 by the shield b and the shield half b '.

A floor protection block A as a third modification shown in FIG. 13 is located on the downstream side of the vertical hole space 8 and at the lower position.
In addition to providing the obliquely columnar shield c, the shield halves c ′ and c ′ are provided below the peripheral vertical hole space forming portions 2 and 2 located on the downstream side.

In such a floor protection block A, the amount of scour can be reduced by the shield c and the shield half c ', and the deposition rate can be slightly reduced. this is,
Since the upstream inclined surface c3 of the shield c is inclined frontward, rearward, and rearward, gravel and the like that are about to flow into the vertical hole space 8 are likely to flow out again along the upstream inclined surface c3. is there.

A floor guard block A as a fourth modification shown in FIG. 14 has a vertical hole space forming portion 3 at a lower position of the vertical hole space 8.
A ring-shaped shield c having the same outer diameter as the inner diameter is provided, and quarter-circle shields c4, c4 are provided at the lower positions of the four peripheral vertical hole space forming portions 2, 2, 2, 2. , c4, c4 are provided.

In such a guard floor block A, the shields c, c4
By properly forming the thickness, the scour prevention effect can be obtained.

A floor protection block A as a fifth modification shown in FIG. 15 is located on the downstream side of the vertical hole space 8 and at the lower position.
A half-moon shaped shield c is provided, and shield half halves c ′, c are formed by dividing the above shields c, c into left and right parts at the lower positions of the peripheral vertical hole space forming parts 2, 2 located on the downstream side. 'Is provided.

In the floor guard block A, the scour prevention effect can be obtained by appropriately forming the thickness of the shield c and the shield half c '.

In the floor protection block A as a sixth modification shown in FIG. 16, a shield d having a triangular side surface is arranged on the upper surface of the floor protection block main body a and the upstream side of the vertical hole space forming portion 3 is arranged. The peripheral vertical hole space forming portion 2 is shielded while partially shielding it.

In the floor guard block A, the open area of the vertical hole space 8 by the shield d is made sufficiently small,
Both the scour prevention effect and the accumulation prevention effect can be obtained.

In this case, it is preferable that the relative roughness height, which is the ratio of the roughness height of the shield d as the roughness to the water depth, is made small.

In a floor guard block A as a seventh modification shown in FIG. 17, a half-moon shaped shield d is arranged on the upper surface of the floor guard block body a, and the upstream side of the vertical hole space forming portion 3 is partially In addition to shielding, a part of the peripheral vertical hole space forming portion 2 is also shielded.

In the floor guard block A, the deposition preventing effect can be obtained by reducing the open area of the vertical hole space 8 by the shield d.

In the bed guard block A according to this embodiment, as shown in the first to seventh modification examples, shields b and c are provided on the upstream side and / or the downstream side of the vertical hole space 8. It is also possible to provide the shield body d on the upper surface of the floor protection block body a, and the shields b, c, d can be arbitrarily combined with each other in shape and arrangement position. The size can be appropriately designed and used.

Here, in order to suppress both deposition and scour by the floor protection block A, the area covering the upstream side of the vertical hole space 8 is increased by the shields b and d, and at the same time, the shield c on the downstream side is provided. It is also possible to make the arrangement position of the shallow.

For example, on the upstream side of the vertical hole space 8 and at the upper position, the half-moon shaped shield b shown in the second modification is provided, while on the downstream side of the vertical hole space 8 and at the upper position. , Third
It is possible to use an obliquely cut columnar shield c shown in the modified example, and the shield b formed to have a size that shields the vertical hole space forming portion 3 by half or more.

The floor protection block body a and the shield b,
The shapes of c and d and the shape of the vertical hole space 8 are not limited to those of this embodiment, and can be arbitrarily designed.

[Second Embodiment] A shown in FIGS. 18 to 24
Is a protection bed block as a second embodiment, and the basic structure is the same as that of the protection bed block A of the first embodiment, but in the protection bed block A of the second embodiment, 15, the upstream side is at a low position, and the downstream side is formed at a high position in a rearwardly inclined shape, and the front-rear width of the light passing hole 15 is formed small,
The open area of the ecosystem protection space 16 in plan view is made as small as possible, and the floor protection block body a
In addition to the four corners, the communication passage 5 is formed toward the front, rear, left and right sides.

Further, in the bed guard block A of the second embodiment,
Adjacent floor guard block A is formed by forming adhesive filling hole forming portion 17 having an opening on the upper surface side and the side surface side, instead of forming small vertical hole space forming portion 4 without providing protrusion 7 on floor guard block main body a. Adhesive filling holes 18 are formed by the adhesive filling hole forming portions 17, 17 of A and A, and an adhesive such as concrete or cement is filled into the adhesive filling holes 18 to adjoin adjacent floors. The blocks A and A can be firmly and integrally connected to each other.

The floor block A constructed as described above is
As shown in FIG. 18, when they are laid in order on the river bed K, the vertical hole space 8 is the center and the peripheral vertical hole space 8'is formed around the vertical hole space 8 and each vertical hole space 8, 8 ' Communication passage 5
Through the ecological protection space 16 formed in each communication passage 5 and each vertical hole space 8, 8 ′, the flowing water gradually flows through the riverbed K, thereby improving the flood control effect of the river. Not only can it be improved, but the ecological protection environment can be improved.

At this time, since the shields b and c are formed around the light-passing hole 15 in the floor protection block main body a, the shields b and c prevent the scour of the river bed K and the river bed K from being scoured. The effect of preventing the accumulation of gravel and the like on K can be secured.

Further, as in the case of the first embodiment, a floor board B can be appropriately attached to the lower surface of the floor protection block A for use.

[Third Embodiment] A shown in FIGS. 25 to 35.
Is a guard bed block as a third embodiment, and the basic configuration is the same as that of the guard bed block A of the second embodiment, but in the guard bed block A of the third embodiment, On the upper surface of a, a semi-disc-shaped shield d is provided on the shield b.
And a side shield plate that extends rearward from the left and right rear ends of the shield d along the left and right side edges of the light passage hole 15
d1 and d1 are integrally formed, and quarter disk-shaped shield half portions d'and d'are provided on the upper ends of the peripheral vertical hole space forming portions 2 and 2 on the downstream side while the upstream side is formed. In the peripheral vertical hole space forming portions 2 and 2, peripheral light transmitting hole forming portions 19 and 19 for forming the peripheral light transmitting holes 20 are formed, and the peripheral light transmitting hole forming portions 19 and 1 are formed.
The side shields d1 'and d1' are integrally formed along the side edges of 9.

In this way, the protection floor block A is shown in FIG.
As shown in Fig. 5, when it is laid on the riverbed K in an orderly manner,
The four guard floor blocks A are assembled to form one peripheral vertical hole space 8 ', and a peripheral light passage hole 20 is formed above the peripheral vertical hole space 8'. Regarding the light hole 20, the light passage hole 15 formed in the central portion of the floor block body a is shielded from the upstream side and the left and right sides by the shield d and the side shields d1 and d1. Similarly, the upstream side and the left and right sides are shielded by the shield d'and the side shields d1 ', d1'.

Therefore, the running water flowing down from the upstream side to the downstream side on the floor protection block body a is smooth along the shields d, d'and the side shields d1, d1, d1 ', d1'. The gravel and the like that flow to and move along with the flowing water hit the shields d and d'and jump over the light-passing holes 15 and 20, and at the same time,
The side shields d1 and d1 'do not flow into the light passage holes 15 and 20 from the side, and the scour prevention effect of the river bed K and the river bed K
The effect of preventing the accumulation of gravel and the like on the top can be further enhanced.

Further, in the bed guard block A of the third embodiment,
The shield half part c'which is integrally formed with the upstream peripheral vertical hole space forming portion 2 is formed with a front-rear-back-high inclined downstream inclined surface c3 ', while the downstream peripheral vertical hole space forming portion is formed. 2, a shield half b'integrally formed on the second side has a front low rear high inclined inclined surface on the upstream side.
It forms b3 '.

In this way, in the peripheral vertical hole space 8'formed around the central vertical hole space 8 ', the scour preventive effect of the river bed K by the shields b', c'and the effect on the river bed K are obtained. The effect of preventing the accumulation of gravel, etc. is ensured.

In addition, in the peripheral vertical hole space forming portion 2, a quarter of a truncated cone is formed in the portion between the shield half portions b ', c'and the communication passage 5 formed below them. Circular concave surface
21 and 22 are formed, and stepped concave grooves 23 and 24 communicating with the upper surfaces of the end portions of the communication passages 5 are formed in the concave surfaces 21 and 22, respectively.

In this way, the inflow / outflow of the flowing water between the peripheral vertical hole space 8'and the communication passage 5 is made smooth, and the flood control effect can be enhanced.

Incidentally, as in the case of the first embodiment, a floor board B can be appropriately attached to the lower surface of the floor protection block A for use.

Next, the first embodiment constructed as above will be described.
A modified example of the floor protection block A according to the third embodiment will be described.

In the floor guard block A as an eighth modification shown in FIG. 36, the vertical passage space 8 formed in the central portion of the floor guard block body a radially communicates with the communicating passages 5, 5 toward each corner.
5 and 5 are formed, and the communication passages 5, 5 gathered at the corners
The end portions of 5, 5 are connected so that the vertical hole spaces 8, 8 communicate with each other.

37. As the ninth modification example shown in FIG. 37, a floor guard block A has a peripheral vertical hole space forming portion 2 having a right-angled triangular shape in plan view, which is formed at a corner portion to form a set of peripheral vertical hole space forming portions. A peripheral vertical space 8'having a quadrangular prism shape is formed by 2, 2, 2, 2.

The peripheral light passage hole 20 is also formed in the peripheral vertical hole space 8 ', and the first to third embodiments are provided on the upstream side and the downstream side of the peripheral light passage hole 20 as well. A shield similar to any of the above is formed.

38 to 41, a guard floor block A as a tenth modification example has an upper layer portion a1 formed in a rectangular plate shape and a lower layer portion a2 inscribed in the upper layer portion a1. It is formed in a cylindrical shape having a radius.

The upper layer portion a1 has a light-passing hole 15 formed in the center portion thereof, and the downstream side inclined portions c3, c3 of front low rear height are formed on the upstream left and right side portions, respectively. The peripheral light passage hole forming portions 19 and 19 are respectively formed on the upper and lower sides, and the front and rear high height upstream side inclined surfaces b3 and b3 are formed on the peripheral light passage hole forming portions 19 and 19, respectively. An adhesive filling hole forming portion 17 is formed in the central portion of each of these.

Further, the lower part a2 forms an ecosystem protection space 16 in the central part, and four connecting lines are formed in a direction intersecting with the flowing direction of flowing water at an intersection angle of 45 degrees from the ecosystem protection space 16. The passages 5, 5, 5, 5 are formed radially.

In this way, the four guard beds A,
The peripheral vertical hole space 8 formed by the assembly of A, A and A is
As shown in FIG. 38, the shape is surrounded by a quarter circular arc surface, and the peripheral light passage hole 20 is also provided in the upper part of the peripheral vertical hole space 8.
In addition, the shields b ′ and c ′ are formed on the upstream side and the downstream side of the peripheral light passage hole 20, respectively.

Further, the protection floor block A may also be provided with a shield d if necessary.

In the floor protection block A as an eleventh modification shown in FIG. 42, the floor protection block main body a is formed into a regular hexagon in plan view, and the vertical hole space 8 is formed in the central portion of the floor protection block main body a.
And the peripheral vertical hole space forming portion 2 is formed at a corner portion or a side portion, and the communication passage 5 is formed from the vertical hole space 8 toward each peripheral vertical hole space forming portion 2, 2.

Further, as shown in FIG. 43, a peripheral communication passage forming portion 25 is formed on the side surface of the floor protection block main body a, and the end portion of the peripheral communication passage forming portion 25 is formed into a peripheral vertical hole space forming portion. 2, 2
Is communicated to.

In this way, as shown in FIG. 42, when a large number of protection beds A are laid on the river bed K in order, the corners and the corners are gathered to form the peripheral vertical hole space 8 '. At the same time, the sides are in surface contact with each other and the peripheral vertical hole space 8 '
And the side surfaces are in surface contact with each other to form the peripheral communication passage 26.

At this time, the vertical hole spaces 8 and 8 formed in the central portion of the floor guard block a, the vertical hole spaces 8 and the peripheral vertical hole spaces 8 ', and the peripheral vertical hole spaces 8'and 8'. ′ Are connected to each other in a mesh shape by the respective communication passages 5 and the peripheral communication passages 26, so that the flood control function can be well secured.

Further, the structures of the light passage hole and the shield according to the first to third embodiments can be applied to the upper position of the vertical hole space 8 and also to the peripheral vertical hole space 8 '. Can also be applied, and in this case as well, the effect of preventing scour of the river bed K and the effect of preventing accumulation of gravel and the like on the river bed K can be well secured.

Next, FIG. 44 shows a modification example of the shield d.
-It demonstrates, referring FIG.

The shield as the first embodiment shown in FIG. 44 has a shape obtained by halving the oblong elliptical shape, and the front end is formed in the oblong shape located on the upstream side outside the vertical hole space 8 and The upper surface is formed in an upward slope from the upstream side to the downstream side.

A shield d as a second modification shown in FIG.
Is a shape obtained by halving a vertically elongated elliptical shape, and the front end is formed in a vertically elongated shape located on the downstream side inner side of the vertical hole space 8 and the upper surface is formed in an upward slope shape from the upstream side toward the downstream side. doing.

A shield d as a third modification shown in FIG.
Is formed in a triangular plate shape, and the upper surface is formed in an upward slope shape from the upstream side toward the downstream side.

A shield d as a fourth modification shown in FIG.
Has a triangular plate-like shape on the upstream side and a rectangular plate-like shape on the downstream side, and the upper surface of the triangular plate-like part is formed in an upwardly inclined shape from the upstream side toward the downstream side, and also has a rectangular plate-like shape. Is formed on a horizontal plane parallel to the upper surface of the floor block body a.

The various shields d described above can be appropriately set according to the velocity and flow rate of the flowing water of the river bed K. Further, the inclination angle of the upper surface of each shield d can be appropriately set, and can be a horizontal surface parallel to the upper surface of the floor protection block body a.

[0119]

According to the present invention, the following effects can be obtained.

(1) In the present invention as set forth in claim 1, since the guard bed block partially shields the vertical hole space formed in the guard bed block with the shield, the guard bed block is provided in the river bed. When it is laid in order, it is possible to reduce the turbulence of running water in each vertical hole space to prevent scouring of the river bed due to the same running water and to prevent the accumulation of sand and gravel on the river bed. Good protection can be ensured.

Therefore, it is possible to improve the flood control of the river and protect the ecosystem of the river, and also to function as a hideaway for aquatic animals by forming a shade in the vertical hole space and the communication passage. Aquatic animals can be raised.

(2) In the present invention as set forth in claim 2, an upper layer portion mainly having a bed protection function and a lower layer portion mainly supporting the upper layer portion and having a function of protecting and cultivating an ecosystem of fish and algae. Form the body of the floor block from, and form a light-passing hole that penetrates vertically in the upper layer,
The light passage hole is formed in a lower position on the upstream side and in a rearward tilted position on the lower side, while the ecosystem protection space communicating with the light passage hole is formed in the lower layer. It is made wider than the front and back, and the circumference of the light-transmitting hole is a shield that partially shields the vertical hole space formed by the ecosystem protection space and the light-transmitting hole. A communication path extending from the space in the radial direction and communicating with the outside is formed.

Therefore, especially in the event of a flood, the upper layer exerts a floor protection function, and the flood can be swiftly drained, while the lower ecosystem protection space and communication passage ensure a gentle flow of water. Then, while providing a habitat for fish and algae, it can protect and nurture the ecosystem and purify water quality, and further function as a habitat for aquatic animals at water flow rates and low water levels. It also functions as an evacuation site for aquatic animals during floods.

At this time, since the light-transmitting hole is formed in the upper layer, light enters the ecological protection space through the light-transmitting hole, and from this point as well, it is comfortable for fish and algae. A system protection environment can be provided.

In addition, the light passage hole is formed in a forwardly inclined shape in which the upstream side is at a low position and the downstream side is at a high position, and the light passage hole is partially shielded around the vertical hole space around the light passage hole. Therefore, it is difficult for the flowing water flowing down the protection bed block from the upstream side to the downstream side of the river to flow into the ecosystem protection space through the light passage hole, which prevents scouring of the river bed. In addition, gravel, etc. flowing down together with the running water is bounced back to the front, low, and high on the downstream inclined surface of the sloped hole for light passage, and it is difficult for it to flow into the ecosystem protection space. It can be prevented from being deposited.

(3) In the present invention as set forth in claim 3, the floor protection block main body is formed in a regular polygonal shape in plan view, and a vertical hole space is formed in the central portion of the floor protection block main body. Since the communication passages are formed from the space to the corners around the space, it is possible to lay such guard bed blocks on the river bed in an orderly manner. Connected at the corners of the main body of the floor block, the vertical hole spaces formed in the center of the main body of the floor block can be communicated with each other through each communication passage, improving the flood control of the river and ecology of the river. The system can be protected.

(4) In the present invention as set forth in claim 4, the floor protection block main body is formed in a regular polygonal shape in plan view, and a vertical hole space is formed in the central portion of the floor protection block main body to form the vertical hole. Since the communication passages are formed from the space toward the peripheral side, it is possible to lay such a guard bed block on the river bed in an orderly manner. Connected at the sides of the main body of the floor block, the vertical hole spaces formed in the center of the main body of the floor block can be communicated with each other through each communication passage, improving the flood control of the river and ecology of the river. The system can be protected.

(5) In the present invention according to claim 5, a peripheral vertical hole space is formed which vertically penetrates the peripheral portion of the floor protection block body and communicates substantially perpendicularly to the tip opening portion of the communication passage. Because of the formation of the section, when such a guard bed block is laid in order on the river bed, in addition to the vertical hole space formed in the central portion of the guard bed block, the surrounding area of the guard bed block body is also surrounded. The vertical hole space forming unit is gathered to form the vertical hole space around the vertical hole space, and the ecosystem protection space can be added.

At this time, since the central vertical space and the peripheral vertical space communicate with each other through the communication passages, it is possible to improve the flood control of the river and to make the ecosystem comfortable for fish and algae. A protected environment can be provided.

(6) According to the sixth aspect of the present invention, since the peripheral communication passage forming groove extending in the horizontal direction substantially orthogonal to the vertical space is formed on the side surface of the floor protection block main body, such protection is provided. When the floor blocks are laid in order on the river bed, peripheral communication passages can be added by the peripheral communication passage forming grooves formed in the adjacent floor protection block main body, and the communication passages formed in a mesh form The flood control function can be improved.

(7) In the present invention as set forth in claim 7, a peripheral vertical hole space which penetrates the periphery of the floor protection block body in the up-down direction and communicates substantially perpendicularly to the end of the peripheral communication passage forming groove. Since the forming portion is formed, in addition to the effect described in (6) above, the peripheral vertical hole spaces formed by the gathered peripheral vertical hole space forming portions can be connected by the peripheral communication passages. , It is possible to improve the ecological protection environment by adding ecological protection space for fish and algae.

(8) In the present invention as set forth in claim 8, since the adhesive filling hole forming portion having an opening on the upper surface side and the side surface side is formed in the periphery of the floor guard block main body, the floor guard block is formed. If they are laid in order on the riverbed, the adhesive filling hole forming parts are formed by the adhesive filling hole forming parts of the adjacent floor protection block main body, and concrete or mortar is bonded to the adhesive filling hole forming part. By filling the agent, it is possible to firmly bond the adjacent floor block blocks to each other to integrate the plurality of floor block groups, and to ensure the good floor guard function by the floor block groups.

(9) In the present invention according to claim 9, the shield is provided on the upstream side or the downstream side of the peripheral vertical hole space formed by assembling a plurality of vertical hole spaces and / or peripheral vertical hole space forming portions. The vertical hole space and /
Alternatively, a shield that blocks a part of the upstream side of the peripheral vertical hole space can prevent the accumulation of gravel and the like on the riverbed, while the downstream side of the vertical vertical space and / or the peripheral vertical hole space can be prevented. By the shield that shields the part, the riverbed can be prevented from being excavated.

(10) In the tenth aspect of the present invention, the shield is arranged on the upper surface of the floor protection block body and is formed by collecting a plurality of vertical hole spaces and / or peripheral vertical hole space forming portions. Since the upstream side of the surrounding vertical hole space is partially shielded, it is possible to prevent the river bed from being scourd through each vertical hole space by the same shield, and to prevent the accumulation of gravel and the like on the river bed. Can be prevented. In this case, it is desirable that the shield area of the vertical hole space or the peripheral vertical hole space is sufficiently large.

(11) In the present invention as set forth in claim 11, the shield partially shields the upstream side of the peripheral vertical hole space formed by a plurality of vertical hole spaces and / or peripheral vertical hole space forming portions. At the same time, since the front side of the shield is formed with an inclined front-side, rear-rear-high, and inclined upstream side in a side view, the shield forms the vertical hole space and / or the upstream side of the peripheral vertical hole space. Since the upper part can be largely shielded, it is possible to reliably prevent the accumulation of gravel and the like on the riverbed through the vertical hole space and / or the peripheral vertical hole space.

In addition, since the upstream inclined surface of the shield is formed in an inclining shape of front low rear high, in the vertical hole space and / or the peripheral vertical hole space, from the upstream lower side to the downstream upper side. Suppressing the flow of gravel, etc. toward the downstream side by the upstream slope, and the flow of gravel, etc. scourd from the riverbed through the vertical hole space and / or the surrounding vertical hole space. You can

(12) In the twelfth aspect of the present invention, the shield partially shields the downstream side of the peripheral vertical hole space formed by a plurality of vertical hole spaces and / or peripheral vertical hole space forming portions. In addition, since the front side of the shield has an inclined downstream side surface with a front low rear height in a side view, the shield allows the vertical hole space and / or the downstream of the peripheral vertical hole space to be downstream. The lower side part can be largely shielded, and it is possible to reliably prevent the riverbed from being scourd through the vertical hole space and / or the peripheral vertical hole space and gravel and the like flowing out through the vertical hole space.

Moreover, since the downstream inclined surface of the shield is formed in an inclined shape of front low rear high, the gravel and the like that move with the flowing water flowing from the upstream side to the downstream side of the river are When it tries to flow into the hole space and / or the surrounding vertical hole space, it is reflected upward by the downstream side inclined surface, so that gravel and the like is deposited on the riverbed through the vertical hole space and / or the surrounding vertical hole space. Can be prevented.

[Brief description of the drawings]

FIG. 1 is an explanatory plan view showing a state in which a floor protection block as a first embodiment according to the present invention is laid.

FIG. 2 is a sectional view taken along line II of FIG. 1;

FIG. 3 is a perspective view of a floor protection block as a first embodiment.

FIG. 4 is a plan view of the guard floor block.

FIG. 5 is a front view of the guard block.

FIG. 6 is a sectional view taken along line II-II of FIG.

FIG. 7 is a sectional view taken along line III-III of FIG. 5;

FIG. 8 is a perspective view of a reinforcing reinforcing bar incorporated inside the guard floor block main body.

FIG. 9 is a perspective view of a connector inserted into a connection portion.

FIG. 10 is a perspective view of a floor block for arranging the most downstream side of the floor block group.

FIG. 11 is a schematic plan view and a schematic side view of a floor protection block as a first modification.

FIG. 12 is a schematic plan view and a schematic side view of a floor protection block as a second modification.

FIG. 13 is a schematic plan view and a schematic side view of a floor protection block as a third modification.

FIG. 14 is a schematic plan view and a schematic side view of a floor protection block as a fourth modification.

FIG. 15 is a schematic plan view and a schematic side view of a floor protection block as a fifth modification.

FIG. 16 is a schematic plan view and a schematic side view of a floor protection block as a sixth modification.

FIG. 17 is a schematic plan view and a schematic side view of a floor protection block as a seventh modification.

FIG. 18 is an explanatory plan view showing a state in which a floor protection block as a second embodiment is laid.

FIG. 19 is a plan view of the guard floor block.

FIG. 20 is a side view of the guard floor block.

21 is a sectional view taken along line IV-IV of FIG.

FIG. 22 is a front view of the guard floor block.

FIG. 23 is a rear view of the guard floor block.

FIG. 24 is a bottom view of the guard floor block.

FIG. 25 is an explanatory plan view showing a state in which a floor protection block as a third embodiment is laid.

FIG. 26 is a plan view of the guard floor block.

FIG. 27 is a side view of the guard floor block.

28 is a sectional view taken along line VV of FIG.

FIG. 29 is a sectional view taken along line VI-VI of FIG. 26.

FIG. 30 is a front view of the guard floor block.

FIG. 31 is a rear view of the guard floor block.

FIG. 32 is a view on arrow P of FIG. 26.

FIG. 33 is a view on arrow Q in FIG. 26.

34 is a sectional view taken along line VII-VII of FIG.

FIG. 35 is a bottom view of the guard floor block.

FIG. 36 is a plan view showing a state in which a floor protection block is laid as an eighth modification.

FIG. 37 is a plan view showing a state in which a floor protection block as a ninth modification is laid.

FIG. 38 is a plan view showing a state in which a floor protection block is laid as a tenth modification.

FIG. 39 is a plan view of the guard floor block.

FIG. 40 is a side view of the guard floor block.

FIG. 41 is a front view of the guard floor block.

FIG. 42 is an explanatory plan view showing a state in which a floor protection block is laid as an eleventh modification.

FIG. 43 is a cross-sectional view of a peripheral communication passage.

FIG. 44 is a plan view and a cross-sectional side view of a shield as a first modification.

45A and 45B are a plan view and a sectional side view of a shield as a second modification.

FIG. 46 is a plan view and a sectional side view of a shield as a third modification.

47A and 47B are a plan view and a sectional side view of a shield as a fourth modification.

[Explanation of symbols]

 A Floor protection block 2 Peripheral vertical hole space forming part 3 Vertical hole space forming part 4 Small vertical hole space forming part 5 Communication path 6 Reinforcing bar 7 Protrusion 8 Vertical hole space 9 Small vertical hole space 10 Connecting tool 11 Recessed part

Claims (12)

[Claims] 1. A part of the floor guard block main body, which has a vertical hole space penetrating in the vertical direction and a communication passage extending in the radial direction from the vertical hole space and communicating with the outside, partially covering the vertical hole space. A floor block that is provided with a shielding body. 2. A main body of a guard bed block is formed from an upper layer portion mainly having a floor guarding function and a lower layer portion which supports the upper layer portion and mainly has a function of protecting and nurturing an ecosystem of fish and algae, In the upper layer portion, a light passage hole penetrating in the up-down direction is formed, and the light passage hole is formed in a lower position on the upstream side and in a rearward inclination position on the lower side, while the lower layer portion has The ecosystem protection space that communicates with the hole for light transmission,
Formed to be wider in the front and rear than the hole for light passage, and surrounding the hole for light passage as a shield that partially shields the vertical hole space formed by the ecosystem protection space and the hole for light passage, In addition, a floor protection block that extends from the ecological protection space in the radiation direction and forms a communication path that communicates with the outside. 3. The guard floor block main body is formed in a regular polygonal shape in plan view, a vertical hole space is formed in the central portion of the floor guard block main body, and the vertical floor space is connected to the peripheral corners. The floor protection block according to claim 1 or 2, wherein a passage is formed. 4. The floor protection block main body is formed in a regular polygonal shape in plan view, and a vertical hole space is formed in the center of the floor protection block main body, and the vertical floor space is connected to the peripheral side portions. The floor protection block according to claim 1 or 2, wherein a passage is formed. 5. A peripheral vertical hole space forming portion that penetrates in the up-down direction and that communicates substantially perpendicularly to the tip opening portion of the communication passage is formed in the periphery of the floor protection block body. The floor block according to any one of 1 to 4. 6. The floor guard according to any one of claims 1 to 5, wherein a peripheral communication passage forming groove extending in a substantially horizontal direction is formed on a side surface of the floor guard block main body. block. 7. A peripheral vertical hole space forming portion that penetrates in the up-down direction and communicates substantially perpendicularly to the end portion of the peripheral communication passage forming groove is formed in the periphery of the floor protection block body. The floor protection block according to claim 6. 8. The floor guard block according to claim 1, wherein an adhesive filling hole forming portion having an opening on the upper surface side and the side surface side is formed around the floor guard block main body. . 9. The shield partially shields at least one of the upstream side and the downstream side of the vertical hole space and / or the peripheral vertical hole space formed by a plurality of peripheral vertical hole space forming portions. The floor guard block according to any one of claims 1 to 8. 10. The shield is arranged on the upper surface of the floor protection block body, and part of the upstream side of the peripheral vertical hole space formed by collecting a plurality of vertical hole spaces and / or peripheral vertical hole space forming portions. The floor protection block according to any one of claims 1 to 8, which is shielded. 11. The shielding body partially shields an upstream side of a vertical hole space and / or a peripheral vertical hole space formed by assembling a plurality of peripheral vertical hole space forming portions, and a side surface at a rear portion of the shield body. The floor protection block according to any one of claims 1 to 9, wherein an upstream-side inclined surface having a front-rear, rear-rear-high inclination is formed. 12. The shielding body partially shields a downstream side of a peripheral vertical hole space formed by assembling a plurality of vertical hole spaces and / or peripheral vertical hole space forming portions, and at the front portion of the shielding body. The floor protection block according to any one of claims 1 to 9, wherein an inclined downstream side inclined surface having a front low rear high is formed in a side view.