JP3242197B2 - Vegetation root consolidation fish nest block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ecologically friendly vegetation rooting fish nest block for landscapes and ecosystems such as fish.

[0002]

2. Description of the Related Art A concrete rooting block made of a river has a square or polygonal bottom surface in order to connect a large number of blocks, and recently a hole is provided through the inside of the body to serve as a fish nest. Some are also available (eg, Japanese Utility Model Laid-Open No. 2-84824).

[0003]

In recent years, there has been a demand for a landscape in a river using a consolidation block that is as natural as possible and suitable for plants and organisms, in consideration of the environment.
Further, with respect to durability, a material which is stable for a long period of time has been demanded more than before.

[0004]

SUMMARY OF THE INVENTION In order to meet the above-mentioned demand, the present invention provides a vegetation root consolidation block having a vegetation soil accommodating hole 4 provided substantially downward from the top of a mountain-shaped frame. A vegetation root-consolidated fish nest block having a high-strength concrete layer 1 and at least a porous concrete layer 2 at the rear surface and having a fish nest hole 3 from the side to the inside was provided. High-strength concrete layer 1 here
The high strength of the porous concrete layer 2
This means that the porous concrete layer 2 on the rear side in the direction of flowing water protects the strength of the porous concrete layer 2 from the point of difficulty, so that it is a general term for ordinary concrete, high-strength concrete and the like.

[0005] The porous concrete layer 2 is a layer formed of porous concrete (NFC), which has a large gap and therefore has difficulty in strength, but greatly contributes to the biological environment as described later. As an example of a method for forming the porous concrete layer 2, a concrete obtained by adding a high-performance water reducing agent, activated silica, or the like to a binder and dusting the aggregate with a viscous cement mortar that does not cause separation can be used. Although the porous concrete layer 2 does not necessarily need to extend to the inside, porous concrete is used for the surface even if the inside is ordinary concrete in consideration of the object of the present invention.

A landslide prevention net 5 is preferably provided around the vegetation soil accommodation hole 4. This sediment loss prevention net 5
In the case where the vegetation soil accommodating hole 4 is a hole penetrating from the top to the bottom, a bag-like one that is also present at the bottom is preferable. In addition, the most effective part by providing the sand flow prevention net 5 is
It is a portion where the fish nest hole 3 and the vegetation soil accommodating hole 4 intersect from the side of the frame toward the inside. Sand Loss Prevention Net 5
The material is not particularly limited as long as it is durable, but it is necessary to have a mesh that does not allow the earth and sand filling the vegetation soil accommodating hole 4 to flow away.

[0007] This vegetation root compaction fish nest block has a structure having a slope that is curved downward (convex downward) from the bottom to the top with respect to the direction of flowing water, and the bottom is suitable for laying many pieces. A square or polygon is good.

[0008]

The vegetation root compaction fish nest block of the present invention has a high-strength concrete layer 1 on the front in the flowing direction, so that it exhibits resistance to impacts caused by earth and sand flowing down the river,
Have durability. The surface of the other part is the porous concrete layer 2, so that bacteria, small animals, algae, and the like in the water can adhere and inhabit.

Since the fish nest hole 3 is provided from the side to the inside, the hole can be used as a habitat for fish.
The roots and sediment of the plants rooted in the soil of the vegetation soil receiving hole 4 are used to prevent fish and other organisms living in the fish nest hole 3 and the sediment loss prevention net 5.
Can be contacted through. This enables spawning and the like in a more natural form.

[0010] Since the slope from the bottom to the top has a downwardly curved gradient with respect to the direction of flowing water, the force (F) of pushing down the entire vegetation root consolidation fish nest block to the ground by the flowing water pressure acts to improve stability. Increase.

[0011]

FIG. 1 is a cutaway side view of a main part of a vegetation root compaction fish nest block of the present invention arranged in a river, and FIG. 2 is a plan view of the same. This vegetation root compaction fish nest block having a flat part at the top when viewed from the side, the front in the flowing direction has a shape with a slope that is curved downward (convex downward) from the bottom to the top. I have. As the momentum of the water increases, the force (F) acts obliquely downward as indicated by the arrow in the figure, so that it is pressed against the ground and has good stability. It is a high-strength concrete layer 1 using concrete. The rear portion is entirely formed of the porous concrete layer 2.

The porous concrete layer 2 occupying a large part of the vegetation root compaction fish nest block of the present invention is provided with a vegetation soil receiving hole 4 from the top downward. The vegetation soil accommodation hole penetrates to the bottom in this example, but may be a hole extending to the position of the fish nest hole 3 provided from the side to the inside.

A landslide prevention net 5 is provided around the inside of the vegetation soil accommodation hole 4. The sediment loss prevention net 5 is a hole in which the vegetation soil accommodation hole 4 of the vegetation root compaction fish nest block penetrates from the top to the bottom, so that the net also exists at the bottom. Since the net 5 for preventing sand flow is provided, the hair roots and soil of the plants that have been rooted in the soil of the vegetation soil receiving hole 4 communicate with organisms such as fish living in the fish nest hole 3 via the net 5 for preventing sand flow. Can be contacted.

In the vegetation root compaction fish nest block, the fish nest hole 3 is provided substantially horizontally from the rear until reaching the vegetation soil accommodation hole 4, but it may be further provided on the side surface to provide a plurality of nests. The structure may be wide and narrow, or vice versa.

The bottom is a square suitable for laying a large number of pieces for rooting. The corner is cut off at four corners so as to be close to an octagon, and a projection 6 is provided at the corner to enable connection between blocks. It has become.

[0016]

Since the vegetation root compaction fish nest block of the present invention has the above-described structure, the landscape in a river constructed using the vegetation root is close to nature, and is suitable for living things such as plants and fish. It will be suitable. In addition, it has excellent durability and functions as a solidification block for a long period of time, as well as vegetation and fish nest functions.

[Brief description of the drawings]

FIG. 1 is a cutaway side view of a main part of a vegetation root compaction fish nest block of the present invention disposed in a river.

FIG. 2 is a plan view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High-strength concrete layer 2 Porous concrete layer 3 Fish nest hole 4 Vegetation soil accommodation hole 5 Sediment loss prevention net 6 Projection bar

──────────────────────────────────────────────────続 き Continued on the front page (56) References Japanese Utility Model 4-134534 (JP, U) Japanese Utility Model 4-89114 (JP, U) Japanese Utility Model 3-54162 (JP, U) Japanese Utility Model 1- 105635 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02B 3/14 A01K 61/00 313

Claims (3)

(57) [Claims] 1. A vegetation root compaction block having a vegetation soil receiving hole 4 provided substantially downward from the top of a chevron frame, having a high-strength concrete layer 1 on a front surface in a flowing water direction, and a rear portion having at least a surface. A vegetation root consolidation fish nest block comprising a porous concrete layer 2 and a fish nest hole 3 provided from the side to the inside. 2. The fish nest block according to claim 1, wherein a sediment flow prevention net 5 is provided around the vegetation soil accommodating hole 4. 3. The fish nest block for consolidating vegetation roots according to claim 1, wherein a slope is provided which is curved downward from the bottom to the top in the flowing water direction.