JPH0881937A - Bed-protecting block - Google Patents

Abstract

PURPOSE: To prevent scouring on a riverbed by a method wherein the underside of sectorial parts, a circular part, semi-circular parts and communicating parts are blocked with a bottom board, and water current flowing into the riverbed is prevented therewith. CONSTITUTION: A grouped bed-protecting block bodies G is formed by laying the bed-protecting block bodies (a) on the riverbed K. Abed-protecting block A is formed with a bottom board (b) attached to the underside of the block body (a), and the blocks A are laid in the breadthwise direction only on the lowermost part of the block body group G, and thereby a bed-protecting block row L is formed. The block A is so constructed that sectorial parts 2, a circular part 3, semi-circular parts 4 and communicating parts 5 provided to the block body (a) are blocked with a bottom board (b), and because of such structure, earth and sand on the riverbed K right beneath the bottom board can be prevented from moving by water current flowing in through the communicating parts 5, and thereby scouring and breakage of blocks caused by scouring can be prevented. Furthermore, running water resistance can be reduced by hollow parts of the blocks while the blocks can be utilized as gathering places for fishes.

Description

Detailed Description of the Invention

[0001]

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

[0002]

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

A cutout portion is provided in each guard floor block to form a cavity surrounded by the guardbed block. The cavity portion is opened vertically and laterally. The resistance received from running water is reduced and it can also be used as a fish nest.

[0004]

However, in the above-mentioned protection bed block, the riverbed located immediately below the downstream end of the protection bed group is scourd from the downstream side, and the water depth on the downstream side becomes deeper, If the row of protection bed blocks at the downstream end is separated from the river bed and floats in the air, and further scouring progresses, the downstream end of the protection bed block may be damaged due to its own weight.

[0005]

Therefore, according to the present invention, a floor guard block main body and a floor plate attached to the lower surface of the floor guard block body are provided, and the floor guard block body has at least two square vertices. A circular sector centered on the central part of the square and a semi-circular part of small diameter centered on the midpoint of at least two sides of the square. A communicating portion is formed on the lower surface, the communicating portion communicating in the radial direction of the fan-shaped portion from the fan-shaped portion to the circular portion, and the floor plate is the fan-shaped portion and the circular portion formed in the floor protection block body. And the semicircular part and the lower part of the communication part are closed, and the protection bed block is provided.

Another feature is that the floor guard block main body and the floor board are separate bodies and are connected by a connecting means.

[0007]

Embodiments of the present invention will be specifically described below with reference to the drawings.

1 to 3 is a floor guard block according to the present invention. In the floor guard block A, a floor plate b is bonded to the lower surface of the floor guard body a by an adhesive as a connecting means. Are formed.

On the riverbed K, a large number of single guardbed block bodies a are laid in order in the front-rear and left-right directions to form a guardbed block body group G, which is located on the most downstream side of the guardbed block body group G. Only the guard floor block A according to the present invention is arranged to form the guard floor block row L.

As shown in FIGS. 3 to 7, the floor protection block main body a has a fan-shaped portion 2 surrounded by arcs of equal diameter centering on four vertices of a square, and a central portion of the square. It has a planar shape in which a circular portion 3 having the same radius as the fan-shaped portion 2 and a semicircular portion 4 having a small diameter centered on the midpoints of the four sides of the square are cut out. And a communicating portion 5 is formed on the lower surface of the fan-shaped portion 2 in the radial direction so as to communicate from the fan-shaped portion 2 to the circular portion 3.

In this way, as shown in FIG. 1, when the guard floor block body a is laid in order in the front, rear, left and right, the circular portion 3 is formed by the four adjacent fan-shaped portions 2, 2, 2, 2. A circular space 8 having the same size as the above is formed, and a small circular space 9 is formed by two adjacent semicircular portions 4 and 4.

The communicating portion 5 is composed of the floor protection block body a.
When these are stacked, a space is formed between the same floor block bodies a, and running water flows into the circular portion 3 through the space.

In the present embodiment, the radius of the circular portion 3 is made equal to the radius of the fan-shaped portion 2, but it is needless to say that the radii of the two may be different without being restricted by this.

Further, reinforcing bar 6 is embedded inside the floor protection body a, and the reinforcing bar 6 is formed in an annular shape as shown in FIGS. 4 and 6. Protrusions 7 projecting outward are attached to four locations in the circumferential direction. The protrusion 7 is exposed in the space inside the semicircular portion 4 as shown in FIGS. The exposed protrusion 7 is used for hanging a wire in some cases and for lifting the protection floor block body a alone or for lifting the protection floor block A. Further, the floor guard block main body a can also be carried by suspending a wire on the circular portion 3 or the sector portion 2.

As shown in FIG. 4, the small circular space 9 is provided with a protrusion 7 so that adjacent floor guard block bodies a can be connected to each other through the protrusion 7 as shown in FIG. The connecting tool 10 is formed into a column having a diameter corresponding to the size of the small circular space 9, and its height is formed to be the same as the height of the floor block a. . Then, the concave portion 11 is bored to a height corresponding to the protrusion 7.

As shown in FIGS. 3 to 7, the floor plate is formed in a square plate shape, and includes the fan-shaped portion 2, the circular portion 3, the semicircular portion 4, and the communicating portion 5 formed on the floor protection block body a. The lower part is blocked.

FIGS. 10 to 14 show a floor protection block A which forms a group of floor protection block bodies G and longitudinal columns on the left and right sides of the floor protection block row L. The floor protection block body a
2 fan-shaped parts 2 and 2, 1 circular part 3 and 3 semi-circular parts 4, 4 and 4 and 2 communicating parts 5 and 5 are formed, and front and rear corners 12 and Forming twelve.

The floor protection block A is formed by connecting a floor plate b to the lower surface of the floor protection block main body a by a connecting bolt 13 as a connecting means, and is shown in FIGS. 12, 13 and 15. In this way, female screw parts 14, 14, 14 are embedded in the lower three parts of the floor protection block body a, and each female screw part is
While the lower ends of 14, 14 and 14 are opened to the outside, bolt insertion holes 1 corresponding to the above-mentioned female screw portions 14, 14 and 14 are provided at three locations on the floor board b.
5,15,15 are formed in a vertical penetration state. 16 is a washer.

In this way, each bolt insertion hole 15,15,15
The connecting bolts 13, 13, 13 are inserted from below the floor plate b, and the male screw portions 13a, 13a, 13a formed at the tips of the connecting bolts 13, 13, 13 are inserted into the female screw portions 14, 14, 14 respectively. The floor plate b is detachably connected to the floor protection block body a by being screwed to the floor protection block body a so that the floor protection block body a can be used as a single body as necessary.

The embodiment of the present invention is configured as described above, and when the river bed K is protected by the protection bed block A and the protection bed block main body a according to this embodiment, the river bed K is As shown in FIGS. 1 and 2, the floor protection block main body a is laid in order in the front-rear, left-right direction to form a floor protection block body group G, and only the lowermost part of the floor protection block body group G is protected. Floor blocks A are arranged in the left-right width direction to form a floor protection block row L.

In this way, the floor guard block A forming the floor guard block row L has a floor plate below the fan-shaped portion 2, the circular portion 3, the semicircular portion 4 and the communicating portion 5 formed on the floor guard block body a. Since it is blocked by b, it is possible to prevent the sediments and the like of the river bed K located immediately below them from being moved by the flowing water flowing through the communication part 5 and the like, and washing the entire width of the river bed. It is possible to prevent digging. Therefore, damage to the floor protection block group G due to scouring can be prevented.

At this time, the adjoining floor protection block main bodies a are connected by using the connecting tool 10 as follows. That is, after arranging the floor protection block main bodies a as shown in FIGS. 1 and 2, the connecting tool is connected to the small circular space 9 formed by the semicircular portion 4.
Insert 10. At this time, the projection 7 protruding into the small circular 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 circular space 9. .

As a result, there is no movement between the floor protection block bodies a. In addition, the fact that the adjoining floor block main bodies a are connected in this manner makes it possible to fix the floor guard block body groups G arranged as shown in FIG. 1 and FIG. Will be done.

In the floor protection block main body a of the present embodiment, since the protection floor block main body group G is fixed simply by inserting the connecting tool 10 into the small circular space 9, the revetment, erosion control, etc. The construction will be very easy.

Further, even if the protection floor block main bodies a are stacked in several stages in a stable state, the overall stability is not deteriorated at all, and when the protection floor block main bodies a are stacked vertically, the communication portion 5 Serves as a passage for guiding the flowing water to the circular portion 3, and the resistance of the flowing water can be suppressed small. In addition,
In this stacking, when the first-stage floor protection block body a is arranged in the state shown in FIG. 1 and the second-stage floor protection block body a is arranged upside down, the vertically adjacent floor protection block bodies Since the communication part 5 of a forms a space twice as large as the space formed by one communication part 5, the water flow resistance is further reduced. Further, by forming the corners of the communication portion 5 to be round, it is possible to prevent scratches when a human body touches the corners.

After fixing the main body a of the floor protection block in this manner, the stones 12 are put in the space inside the circular portion 3, the circular space 8 and the like.
It is good to put in etc. This cobblestone 12 is a circular part 3 of the floor protection block body group G due to sludge on the seabed or riverbed due to the flow of water.
When it flows into the inner space or the circular space 8, it acts as a filter and has a role of purifying running water. Further, when the space in the circular portion 3, the circular space 8 or the like is filled with limestone, activated carbon or the like, the pesticide sewage and municipal sewage are purified.

In addition, this protection bed block body group G,
When laid on the seabed or the like, water freely flows into the space inside the circular portion 3 or the circular space 8 using the communication portion 5 as a flow path. Therefore, the space inside the circular portion 3 and the circular space 8 can be used as a fish nest. At this time, if a space such as the circular portion 3 or the circular space 8 is laid with earth and sand mixed with organic substances or its corrosives, a mat, etc., it is suitable for habitation, spawning and hatching of shrimp, crab, seafood and microorganisms. You can create a different environment.

Further, the space inside the circular portion 3 and the circular space 8
By vegetating bamboo, grass or the like inside, the structural strength of the floor protection block body group G can be improved.

Further, since the protection bed block A of the present invention and the protection bed block body a as a single body have a stable shape, they are constructed to form a structure such as a revetment, erosion control, or piles. It is also safe when stored in.

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

Further, in the above-mentioned embodiments, the case where the protection floor block A and the protection floor block main body a are laid on the riverbed, the seabed, etc. has been described. It can also be used as a block for various civil engineering works, such as the construction of

[0032]

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

That is, the protection bed block according to the present invention is
When placed and laid at the most downstream end of the conventional guard floor block group, the floor below the fan-shaped portion, the circular portion, the semicircular portion, and the communicating portion formed on the guard floor block main body of the guard floor block. Since it is blocked by, it is possible to prevent the sediment etc. of the river bed located directly below these from being moved by the running water flowing in through the communication part etc., and it is possible to prevent scouring of the river bed. it can. Therefore, it is possible to prevent damage to the floor block due to scouring.

The hollow portion formed by the fan-shaped portion, the circular portion, the semi-circular portion, and the communicating portion of the adjacent main floor blocks reduces the resistance received from running water and also functions as a fish nest. .

In the case where the floor guard block main body and the floor board are separate bodies, the floor guard floor block is laid by connecting the floor guard block body continuously on the downstream side of the weir, and then on the most downstream side. It is also possible to connect the floor plate to the main revetment block body located by connecting means.

[Brief description of drawings]

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

FIG. 2 is a sectional view taken along line I-I of FIG.

FIG. 3 is a perspective view of a floor protection block according to the present invention.

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

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

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

7 is a sectional view taken along line III-III in FIG.

FIG. 8 is a perspective view of reinforcing reinforcing bars incorporated in the guard floor block body.

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

FIG. 10 is a perspective view of a bed protection block for arranging a riverbed side edge portion.

FIG. 11 is a plan view of the guard floor block.

FIG. 12 is a bottom view of the guard floor block.

13 is a sectional view taken along line IV-IV in FIG.

FIG. 14 is a sectional plan view of the same floor block.

FIG. 15 is a cross-sectional view showing a connected state of a floor guard block main body and a floor board.

[Explanation of symbols]

 2 Fan-shaped part 3 Circular part 4 Semi-circular part 5 Communication part 6 Reinforcing bar 7 Protrusion 8 Circular space 9 Small circular space 10 Connecting tool 11 Recessed part 12 Kuriishi

Claims (2)

[Claims] 1. A guard floor block main body and a floor plate attached to the lower surface of the guard floor block main body, wherein the guard floor block main body is an arc of equal diameter centered on at least two apexes of a square. Encircled fan-shaped portion, a circular portion centered on the central portion of the square, and a planar shape with a notched small-diameter semicircular portion centered on the midpoint of at least two sides of the square, and, A communication part is formed on the lower surface in the radial direction of the fan-shaped part to communicate from the fan-shaped part to the circular part, and the floorboard is
A floor guard block characterized in that the fan-shaped portion, the circular portion, the semicircular portion, and the lower portion of the communication portion formed on the body of the floor guard block are closed. 2. The body of the floor protection block and the floor board are separate bodies,
The floor protection block according to claim 1, wherein the floor block is connected by connecting means.