JPH11286919A - Bed protecting member and bed protecting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a river environment close to the natural state by forming a concrete block having a horizontally long H-shaped plan form, and providing a hole for setting up a pile. SOLUTION: A concrete block 1A having a horizontally long H-shaped plan form and a plurality of holes is formed. In construction, a pile 3 is set up in each hole of the concrete block 1A, or the tip of the pile 3 is driven to a river to lay a plurality of the concrete blocks 1A on the river bed. Small stones 4 of various sizes are packed between the planted piles 3 on the concrete block 1A to construct a bulkhead for the river. According to this, a bulkhead having a river environment such as rapid current or pool close to the natural state can be formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bed protection member laid on a riverbed to protect the riverbed against running water, and to a bed protection structure using the same.

[0002]

2. Description of the Related Art The conventional bed protection structure is constructed such that a large number of piles are driven into a riverbed, and large and small stones are packed between the piles so that the stones do not move (run off) with respect to the flow.

[0003]

In the conventional protective floor structure,
In this construction, a large number of piles must be driven into the riverbed, so it is difficult to pile up the riverbed when the riverbed is hard soil or rocky soil, etc. Noise, vibration, etc. had adverse effects on the surroundings. Also, since the piles were driven into the riverbed, it was difficult to modify them once they were constructed. Furthermore, in the excavated river, the workability of the above-mentioned pile driving work was poor.

[0004] For these reasons, there has been a demand for the appearance of a bed protection structure using a natural material and having a river environment such as a rapids or an abyss near a natural state.

The present invention has been made in view of the above, and has been made in consideration of the above-mentioned problems, and has the above-mentioned conventional problems and can provide a river environment close to nature. It is an object of the present invention to provide a protection structure using a slab.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, a bed guard member according to the present invention has a horizontally long H-shape and a hole for erecting a pile. It is a concrete block.

[0007] In the protective floor structure using the above protective member, a plurality of protective members are laid on the riverbed, piles are erected in the respective holes, and a horizontal rail is bridged on the piles. In addition, large and small stones are packed between the piles.

[0008]

[Operation] A bed protection structure is constructed by laying bed protection members in a pre-planned area of the river bed, and the bed is protected by the bed protection members laid there.
Then, piles are erected in each hole of the member for bed protection, and a horizontal rail is bridged on the piles.Furthermore, by stuffing large and small stones on these, they become resistance to the flow. Thus, a porous riverbed is formed. The gaps between the piles, crosspieces and large and small stones create a stream through which the river water flows.

[0009]

Embodiments of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes a concrete block laid on a riverbed. This concrete block 1 has a required thickness, and has a width H at a middle portion narrower than a width at both ends in a longitudinal direction. It has a planar shape. And a plurality of holes 2 penetrating in the vertical direction are provided.

The holes 2 are for erecting the stakes 3 as shown by chain lines in the respective drawings, and the number and arrangement of the stakes 3 are appropriate depending on the erection configuration of the stakes 3. That is,
FIGS. 1, 2 and 3 show concrete blocks 1A, 1B and 1C according to the first, second and third embodiments in which the number and arrangement of the holes are different.

The concrete block 1A according to the first embodiment shown in FIG. 1 has a total of six concrete blocks 1 at both ends in the longitudinal direction, two in the width direction and two in the middle part in the longitudinal direction. A hole 2 is provided. The concrete block 1B according to the second embodiment shown in FIG.
A total of two holes 2 are provided. The concrete block 1C of the third embodiment shown in FIG.
A plurality of holes 2 are provided.

Each of the above concrete blocks 1A to 1
Among the C, for example, the concrete block 1A of the first embodiment shown in FIG. 1 is provided with a pile 3 erected in each hole 2 and then laid on the riverbed as shown in FIG. As shown in (1), large and small stones 4 are packed between the piles 3 standing on each concrete block 1A. The pile 3 may be made of wood or concrete.

At this time, each concrete block 1
A is laid in the area planned in advance. The pile 3 is erected in each hole 2 before or after the concrete block 1A is laid on the riverbed. And this pile 3
Is erected by inserting it into the hole 2, but if necessary, pebbles or gravel are put into the gap between the hole 2 and fixed. Further, the tip of the pile 3 may be driven into the riverbed with the concrete block 1A laid on the riverbed.

In the embodiment described above, an example is shown in which only the pile 3 is erected on each of the concrete blocks 1A to 1C. For example, in the concrete block 1A of the first embodiment, as shown in FIG. In addition, a pile 3 in which the horizontal rail 5 is bridged on the pile 3 erected at both ends may be partially used as shown in FIGS. In this case, the horizontal rail 5 can prevent the stone 4 from being washed away by running water. Although the connection between the horizontal rail 5 and the pile 3 is not shown, it is connected with a wire or a bolt is used. When the pile 3 and the crosspiece 5 are made of wood, nails may be used.

FIGS. 9 and 10 show a state in which the concrete block 1A according to the first embodiment is laid stepwise on a riverbed having a step in the flow direction.

As for the use of the concrete block with and without the cross bar 5, for example, as shown in FIG. 9, a concrete block without the cross bar 5 is used in a part of the river width direction. As a result, even when the amount of flowing water is small, flowing water is constantly generated in this portion, and this portion can be used as a fishway.

FIG. 11 shows an example of the form of the pile 3 and the crosspiece 5 of the concrete block 1B according to the second embodiment in which two holes are provided. 5 has a configuration in which the bridge is inclined.

FIG. 12 shows an example of the configuration of the pile 3 and the crosspiece 5 of the concrete block 1C according to the third embodiment in which four holes 2 are provided. The other piles 3A are arranged in a row, and the horizontal rail 5 is bridged between the two piles 3 and 3A.

FIG. 13 shows a state in which the concrete blocks according to the above-described embodiments are laid on a riverbed, and various piles are used in an upright configuration in consideration of the state of the riverbed and the flow of water. . And stuff the stones on this. The flow of water in this case is in the direction of the arrow.

The concrete blocks shown in FIG. 13 are laid in a zigzag manner so that the ends of the other two concrete blocks enter the side of the narrow intermediate portion of one concrete block. An example is shown in which the arrangement is made such that there is no gap. In the drawing, 1D is a half-shaped concrete block used to straighten the outer edge of the concrete block laying area.

[0021]

According to the present invention, it is possible to construct a protective floor structure by laying a protective floor member on a riverbed. Therefore, even when the riverbed is hard, construction of a protective floor structure in which many piles are erected can be performed. It is possible. In addition, it is possible to arbitrarily set the planar shape of the laying area, and it is possible to relatively easily modify the laying area.

In addition, the protective floor structure in which the protective member is laid,
Since there is a gap through which water can pass between the members for bed protection and the stones stuffed on it, the structure becomes porous to the flow of water, and a good habitat for aquatic organisms can be obtained. In addition, the water purification function can be performed.

Further, due to the action of flowing water, bending, steps,
It promotes the emergence of a variety of flow paths such as local deep digging, and can provide a river environment close to nature.

[0024] Furthermore, the riverbed structure according to the present invention, in which the riverbed member is laid on the riverbed, has a riverbed downstream from this part that is scoured and has an edge. In this way, a favorable environment for the fish can be created in which the scouring edge is set.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment.

FIG. 2 is a perspective view showing a second embodiment.

FIG. 3 is a perspective view showing a third embodiment.

FIG. 4 is a perspective view showing a state where a concrete block according to the first embodiment is laid.

FIG. 5 is a perspective view showing a state where a concrete block according to the first embodiment is laid and stones are packed thereon.

FIG. 6 is a perspective view showing an example in which a horizontal rail is bridged on a pile.

FIG. 7 is a perspective view showing a state where concrete blocks having different pile configurations are laid.

FIG. 8 is a perspective view showing a state where concrete blocks having different pile configurations are laid and stones are packed thereon.

FIG. 9 is a perspective view showing a state in which the concrete blocks according to the first embodiment are laid in steps.

FIG. 10 is a perspective view showing a state in which the concrete blocks according to the first embodiment are laid in steps and stones are packed thereon.

FIG. 11 is a perspective view showing a pile configuration of a concrete block according to the second embodiment.

FIG. 12 is a perspective view illustrating a pile configuration of a concrete block according to a third embodiment.

FIG. 13 is a perspective view showing a state in which a concrete block according to each embodiment is laid.

[Explanation of symbols]

1, 1A, 1B, 1C, 1D ... concrete block,
2 ... holes, 3, 3A ... piles, 4 ... stones, 5 ... horizontal rails.

Claims (4)

[Claims] 1. A floor guard member comprising a concrete block having a plane shape formed in a horizontally long H shape and having a hole for erecting a pile. 2. A protection floor structure comprising a plurality of the protection floor members according to claim 1 laid on a riverbed, and a pile installed in each hole. 3. A protection floor structure, wherein a lateral beam is bridged on the pile of the protection floor structure according to claim 2. 4. A bed protection structure characterized in that large and small stones are packed between piles of the bed protection structure according to claim 2.