JPH0762335B2 - Ecosystem improvement revetment structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is built on the shore of rivers, waterways, etc., and provides a favorable environment for the reproduction and growth of small animals such as fish and aquatic insects, and plants such as aquatic plants. It is related to the revetment structure that improves the ecosystem of.

[0002]

2. Description of the Related Art As disclosed in Japanese Utility Model Laid-Open No. 54-65896, it has been conventionally practiced to provide a space for a fish nest in a seawall structure in order to promote the breeding of fish. To construct this revetment structure, a box-shaped block is used in which the top and bottom surfaces are fully open and openings are formed in the front wall and left and right side walls.The block is connected to the bottom of a waterway in the left-right direction. It is laid on the ground and is piled up in a number of vertical stages corresponding to the height of shores such as waterways.

The cavity of the block surrounded by the front and rear walls and the left and right side walls is used as a space for fish nests, and fish enter into the cavity through the opening of the front wall and the left and right side walls It is designed so that it can freely move in and out of the cavities of adjacent blocks in the vertical and horizontal directions through the openings and the openings of the upper and lower surfaces.

However, in this revetment structure, the upper surface of the foundation concrete on which the lowermost block is placed is formed flat, and there is no space where fry and juveniles can escape to avoid predation by external enemies such as adult fish. , Especially does not exist. Therefore, when a foreign enemy enters through the opening in the front wall, there is no way to escape anymore, the consumption rate of predation of juveniles and juveniles becomes high, and the breeding of fishes cannot be practically promoted.

Further, aquatic plants and algae provide a space for fry and juveniles to escape, and also provide an environment suitable for the growth of small animals such as fish and aquatic insects by releasing oxygen associated with the respiratory action. , Initially, there is no soil layer necessary for vegetation such as aquatic plants to settle and grow on the top surface of the foundation concrete. Therefore, there is no choice but to wait for the sediment mixed in the water flow to enter from the opening of the front wall and accumulate, and it takes a long time to form the soil layer for vegetation. Will not be used as a good space for fish nests, and is also unsuitable as a habitat for aquatic insects and small animals.

Further, since there are no through holes or openings penetrating in the thickness direction on the rear wall of the block, the shore part formation and the waterway which the revetment structure contacts are completely cut off by the revetment structure, Clean groundwater filtered in the soil on the shore side will not be added to the water flow in waterways. Therefore, the water flow cannot be purified by the added groundwater.

[0007] As described above, the conventional revetment structure not only lacks the feasibility of maintaining and improving the ecosystem of water and the shore, but also requires a lot of labor for construction because it is constructed by stacking blocks in multiple stages. In a situation where there is a serious shortage of workers, the construction cost increases, and the work efficiency is poor, so the construction period must be extended.

[0008]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an environment suitable for the breeding and growth of small animals such as fish and aquatic insects, and the establishment and growth of plants such as aquatic plants. Since it is possible to reliably obtain a purification effect by adding groundwater on the shore side to the shore, it is effective for maintaining and improving the ecosystem of water and the shore, and at the same time, it is an ecologically improved revetment that saves construction work and can be performed efficiently at low cost. Is to provide the structure.

[0009]

In the following, referring to the reference numerals in the accompanying drawings, the revetment structure of the present invention has a bottom plate portion 2 horizontally connected to a lower portion of an upright wall plate portion 1 to form a water channel 8 or the like. the L-shaped block body 3 heights commensurate with the height of Kishibe, formed by擬木block 15 or the like, is composed of a high partition body 9 fitted with fixing member 10 at the bottom, Kishibe locations canals 8
Penetrated in the thickness direction into the upright wall plate portion 1 in direct contact with the layer 7
L-shaped block body 3 is provided with slits 4 that are long in the vertical direction.
A fixing hole 11 into which the fixing member 10 is inserted is provided in the bottom plate portion of the.

A high partition with the bottom plate 2 of the L-shaped block body 3
By applying leakage prevention treatment with the body 9 ,
The system holding member 5a and the bottom mud and cut grass for river cleaning are stored.
A deep space 6 is provided , and the horizontal projection 14 of the bed 20 and the horizontal projection 13 of the bottom plate 2 of the left and right L-shaped block bodies 3 are fitted to each other to set the bed 20 at the bottom of the water channel 8 or the like. The ecosystem holding member 5b is housed in the recessed space 12 near the center of the riverbed 20. Here, members 5a, 5b for holding the ecosystem
Means sand, gravel, gravel, rubble, crushed stone, etc.

[0011]

[Operation] The earth and sand contained in the water stream flowing through the water channel 8 is deep
When passing through the space 6 and the recessed space 12, the ecosystem holding members 5a and 5b in the spaces 6 and 12 come into contact with or collide with the surfaces of the ecosystem holding members 5a and 5b which function as flow-over resistance elements. The earth and sand gradually accumulate in these spaces 6 and 12 .

[0012] These sediments are used as members 5 for maintaining the ecosystem.
A soil layer suitable for vegetation is formed with a and 5b, and plants such as aquatic plants and algae settle and grow in the soil layer. When the aquatic plant grows to some extent, the space within the community of aquatic plants provides an optimal environment for small animals such as fry and juveniles or aquatic insects to escape. At the stage where the sediment accumulation is insufficient, the large and small play spaces left between the ecosystem holding members 5a, 5a and 5b, 5b are used as a retreat space for fry and small animals.

In the deep space 6 , the fish evacuate from external enemies, and perform breeding behavior such as spawning. Groundwater in the shore formation 7 that is in contact with the revetment structure permeates into the slits 4 of the upright wall plate portion 1 of the block body 3 while being filtered in the soil along the way, and the water flow and space 6 in the water channels 8 and the like from the slits 4 Is added to the accumulated water inside.

[0014]

In the illustrated embodiment, the upright wall plate portion 1 of the L-shaped block main body 3 is provided with two slits 4 on the left and right, and a stone-clad pattern 19 is drawn on the entire surface excluding these slits 4 and the surroundings. It is in harmony with the scenery. As the fixing member 10 of the partition 9, two right and left screwing pins screwed and fixed to the lower nut type insert are used. The bottom plate portion 2 of the L-shaped block 3 is provided with four fixing holes 11. By inserting the lower part of the fixing member 10 into the fixing hole 11, a partition having a high average height with respect to the block main body 3 is formed.
Body 9 is attached, sand and gravel, gravel, or accommodate Kuriishi, ecosystems holding member 5a of the crushed stone, etc., Ya sediment during river cleaning
A deep space 6 is formed for throwing away the grass .

When the partition body 9 is attached to the block body 3, the mortar 17 is filled in the contact portion between the bottom plate portion 2 of the block body 3 and the partition body 9 or a sealing material is inserted to prevent water leakage. Give. Since this leakage prevention treatment, the groundwater flowing out from the slit 4 is retained in dry season, water is reserved in the deep space 6, the air
Organisms and plants can grow within 6 seconds.

As shown in FIGS. 5 and 6, the partition body 9 is formed by arranging ten pseudo-wood blocks in series and joining them in series with a joining material 16. The length of these pseudo-tree blocks is
However, the average height is set high. Each partition 9
Uses the pseudo-tree 15 in order to harmonize with the surrounding landscape, but even if a flat partition plate or the like is used instead of the pseudo-tree 15, the function is sufficiently achieved and the pseudo-tree 15 is used. It is cheaper than

The river bed plate 20 is stably placed by bringing the upper surface 21 of the horizontal projection portion 13 of the bottom plate portion 2 of the left and right block bodies 3 into contact with the lower surface 22 of the horizontal projection portion 14 of the river bed plate 20. . A recessed space 12 near the center of the bed 20
Is provided, and the ecosystem holding member 5b is also provided in the recessed space 12 .
The riverbed ecosystem can be preserved by laying.

[0018]

As described above, in the revetment structure of the present invention, the depth surrounded by the upright wall plate portion 1, the bottom plate portion 2 and the partition 9 is increased.
Since the ecosystem holding member 5a is housed in the open space 6 and the ecosystem holding member 5b is housed in the recessed space 12 provided in the riverbed 20, the space between the ecosystem holding members 5a and
And the escape indicated by the total of the voids between the ecological shape holding members 5b
A large space for occupancy will be secured, and it will be added to the external enemy.
Since the fry and the aquatic insects that have been cut off can immediately hide themselves, the consumption rate of the fry by predation can be reduced.

Due to the deep space 6 and the recessed space 12,
Since many of the ecological holding members 5a and 5b that are housed promote the uptake and accumulation of sediment in the water stream, the soil layer necessary for the growth of plants such as aquatic plants is formed early and sufficiently thick, and fry and aquatic insects are formed. Aquatic plants, which are useful as an escape space for such plants, will be established and proliferate at an early stage, and the oxygen released from the proliferating plants will maintain a good oxygen concentration in the water.
An environment suitable for the breeding and growth of fish and small animals is surely obtained, which is effective for maintaining and improving the ecosystem of water and the shore.

Upright in direct contact with the shore formation 7 of the waterway 8
The slits 4 that penetrate the wall plate portion 1 in the thickness direction are vertically
It is provided long, and the shore part formation 7 and waterways 8 are the slits 4
Since normal groundwater that has been filtered and permeated in the soil of the shore formation 7 is added to the water flow in the waterway 8 etc., it is diluted and purified by the added groundwater. Can be done reliably.

The block body 3 is formed by connecting the bottom plate portion 2 to the upright wall plate portion 1 at a right angle, and has a height corresponding to the height of the shore of the water channel 8 to be laid, so that the height of the block body 3 is small. Unlike conventional revetment structures that stack low blocks in multiple stages, the use of civil engineering machinery allows efficient construction work at low cost by a small number of workers.
Further, since the partition body 9 can be easily attached to the existing water channel, the existing structure can also be used as an ecologically improved revetment.

The lower end of the slit 4 is deep
It opens in space 6 and contacts the upright wallboard 1 during the dry season.
Groundwater from the touching shore part 7 flows out from the slit 4.
To dwell Te, water 18 is secured in the space 6,
Organisms and plants can grow.

The upright wall plate portion 1, the bottom plate portion 2 and the partition body 9
The space 6 formed by and is deep,
There is enough volume to throw away the bottom mud and grass that are produced during cleaning.
Therefore, by using this deep space 6, the dump site
The problem is easily resolved, and the groundwater, soil fungi, and organisms flowing out from the slit 4 also perform a cleaning action.

Further, even if the water falls in the water channel 8 or the like by mistake, the partition plate 9 for forming the deep space 6 has the bottom plate portion 1.
Since it stands up to a certain height or more, the partition 9
Can be used as a foothold to easily escape.

[Brief description of drawings]

FIG. 1 is a perspective view showing an exploded state of a block body and a partition body of an L-shaped ecologically improved revetment structure according to an embodiment of the present invention.

FIG. 2 is a perspective view of the block body.

FIG. 3 is a plan view of the revetment structure in a laid state.

4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is a plan view of a partition body.

FIG. 6 is a front view of the partition body.

[Explanation of symbols]

 1 L-shaped block body upright wall plate portion 2 L-shaped block body bottom plate portion 3 L-shaped block body 4 Slit 5a Ecosystem holding member 5b Ecosystem holding member 6 Deep between the upright wall plate portion and the partition body Space 7 Shore layer 8 Waterway 9 Partition body 10 Fixing member 11 Fixing hole 12 Recessed space for laying ecological system holding member 13 Horizontal projection of bottom plate 14 Horizontal projection of riverbed 15 Simulated wood block 16 Joining of partition plate Member 17 Water leakage prevention mortar 18 Water 19 Stone-clad pattern 20 Riverbed plate 21 Upper surface of horizontal protrusion of bottom plate 22 Lower surface of horizontal protrusion of riverbed plate

Claims (1)

[Claims] 1. A bottom plate portion 2 is horizontally connected to a lower portion of an upright wall plate portion 1 and is formed by an L-shaped block body 3 having a height corresponding to the height of a shore of a water channel 8 and a pseudo-wood block 15. , An upright wall plate portion 1 which is composed of a high partition 9 having a fixing member 10 attached to the lower portion thereof and which is in direct contact with the shore formation 7 of a water channel 8 or the like.
The slit 4 that penetrates in the thickness direction in the vertical direction
Only, the fixing hole 11 provided in which the bottom plate portion to the fixing member 10 of the L-shaped block body 3 is inserted, the water leakage prevention processing performed that between the bottom plate portion 2 and the partition member 9 of the L-type block body 3
I, L type between the upstanding wall plate portion of the block body 3 1 and the bottom plate portion 2 and the <br/> partition body 9, the holding member 5a and river cleaning ecosystem
It forms a deep space 6 in which bottom mud and mowed grass are stored,
The lower end of the grate 4 is opened in the space 6, and the horizontal projection 14 of the riverbed 20 and the bottom plate 2 of the left and right L-shaped block bodies 3 are provided.
Of by fitting the horizontal protrusion 13, the bed plate 20 installed on the bottom of the canals 8, space 1 recess near the center of the bed plate 20
An ecologically improved revetment structure in which the ecological member 5b is housed in 2.