JP2002371536A - Ecosystem conservation overhang channel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a channel that can secure a prescribed quantity of water flow (a planned water quantity) in spite of using general-purpose blocks causing no increase in cost, and moreover can maintain an ecosystem and make effective use of land. SOLUTION: This ecosystem conservation overhang channel comprises a U-shaped block 1 of one bank; an L-shaped block 2 of the other bank; a partition block 3 provided near the bottom slab tip of the L-shaped block, and a bottom slab block or a cast-in-place concrete layer 4 provided between the partition block and the U-shaped block of the other bank. The top part of the partition block is below the water surface in the planned flow quantity, and the bottom part of an ecosystem maintenance region 7 formed between the L-shaped block and the partition block is in a lower position than the maximum bed slab height. A habitation environment maintenance member is then filled in the ecosystem conservation region 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overhanging ecosystem waterway that allows sufficient water flow and enables effective use of land along the waterway while maintaining good ecosystem protection.

[0002]

2. Description of the Related Art Many attempts have been made to eliminate the adverse effects on ecosystems in three-sided concrete-filled waterways by providing vegetation and fish nest functions inside the waterways. For example, as seen in Japanese Utility Model Laid-Open No. 4-46124, Japanese Unexamined Patent Application Publication No. 9-250118, etc., a partition wall is provided near one bank (one side plate) or both banks (both side plate) in a concrete block body having a U-shaped cross section. Thus, there is an example in which a growth environment for aquatic organisms and waterside plants is formed between the side plate and the partition wall. In the case of using a concrete block body having a U-shaped cross section as in this example, when the planned flow rate determined by the channel width and the water level changes, it is necessary to provide a product designed to meet the specifications each time.

[0003] Japanese Patent Application Laid-Open No. 9-250119 and Japanese Patent Application Laid-Open No. 10-3
As seen in 17354 and the like, there is also an example in which the inside is filled with a vegetation base material. However, if a vegetation base material or the like is arranged on the bottom surface of the passing portion, the maintenance of the water channel becomes insufficient, and it becomes difficult to secure the planned flow rate gradually.

The example shown in FIG. 18 is a cross-sectional view of an ecosystem preservation waterway seen in Japanese Utility Model Laid-Open No. 4-46124. A partition 20 is provided near one shore, and an ecosystem conservation area is
This is a structure in which 22 is provided and chestnut stones 23 are arranged. In addition, special fairness
As shown in No. 7-62335, L-shaped blocks are used on both banks, cast-in-place concrete is used in the middle, and partitions are provided at predetermined intervals from the shore, and ecosystem retaining members are placed between them By doing so, there is a structure that secures the planned discharge and solves the above-mentioned difficulties to some extent. However, these two examples are the drawbacks that the land occupation rate of the canals is high.

[0005] The difficulty of high water occupancy in the waterway is eliminated by reducing the opening area at the top. JP 7-32
This purpose can be achieved by using an L-shaped block that is used on both banks, such as No. 4322, in which the upper part of the back plate is inclined forward.However, the difficulty in securing the planned flow rate is as much as the back plate is inclined. In addition, since a general-purpose L-shaped block in which the back plate is formed almost vertically cannot be used, the cost may be increased.

Therefore, as shown in FIG. 19, an ecosystem conservation area (vegetation area) is formed in the waterway, the effective utilization area at the top of the waterway can be increased, and more vegetation area is provided. As a result of studying an overhanging waterway block that can secure the amount of light collected, as shown in Japanese Patent Application No. 2000-358327, a substantially horizontal overhanging portion heading from the block bottom plate 24 to the top of the back plate 25 toward the waterway opening side.
26, a vegetation area is formed at the bottom of the block below the overhang portion 26, and an upper overhang block with a lighting hole is proposed in which a lighting hole 27 is formed at the overhang portion. This example is a structure that has not been seen in the past, such as forming a lighting hole in a horizontal overhang toward the water channel opening side. In this structure, the amount of light emitted from a lighting hole such as a slit to the bottom vegetation area is limited, so that the breeding of aqueous plants is limited. In addition, since the lighting hole 27 is formed in the horizontal overhang 26, there is a drawback that a U-shaped block having a substantially horizontal overhang toward the water channel opening side cannot be used at the top of a commonly used back plate. However, in this case, the cost may be increased. However, it can be appreciated that the L-shaped block 28 is used on the other shore and the cast-in-place concrete 29 is used in the middle to ensure the planned flow rate.

[0007]

Therefore, it is possible to secure a predetermined flow rate (planned flow rate), to use a general-purpose block that does not increase the cost, and to make it possible to conserve the ecosystem and to effectively use land. The waterway which makes it possible was examined. In particular, by improving the layout and shape of the partition blocks, a diverse habitat of living organisms is created, the ecosystem is well preserved and maintained, the water flow is sufficient, and the land along the waterways is effectively used. It was decided to provide an overhanging canal for ecosystem conservation that could be used.

[0008]

As a result of studying the above problems, a U-shaped block on one shore, an L-shaped block on the other shore, a partition block provided near the tip of the bottom plate of the L-shaped block, An ecosystem conservation overhanging canal comprising a bottom slab block or a cast-in-place concrete layer provided between the block and the other shore U-shaped block, wherein the top of the partition block is below the water surface at the planned flow rate. The planned flow rate here refers to a flow rate in a normal state that satisfies the function as a water channel. Although the bottom block is preferably a flat block, it may be provided with beams, natural stones or pseudo stones for controlling the water force and for the safety of aquatic organisms, and may be provided with irregularities. The cast-in-place concrete layer is cast according to the gradient of the water channel and the road. The bottom block or cast-in-place concrete may be porous concrete. If the width of the channel is narrow, or if the overhang length of the bottom plate of the L-shaped block or the U-shaped block can sufficiently cover the bottom of the channel, the bottom plate block or cast-in-place concrete is not necessarily required. In addition, depending on circumstances such as when it is desired to make the waterway bottom a more diverse ecosystem conservation area, a bottom block or cast-in-place concrete may be partially applied.

More specifically, a U-shaped block on one shore, an L-shaped block on the other shore, a partition block provided near the tip of the bottom plate of the L-shaped block, the partition block and the U-shaped block on the other shore. The bottom of the ecosystem conservation area formed between the L-shaped block and the partition block is the maximum floor, and the bottom of the partition block is below the water surface at the planned flow rate. An ecosystem overhanging waterway which is lower than the plate height and is filled with the habitat environment preservation member in the ecosystem preservation area.
With such a structure, a U-shaped block,
A certain amount of water flow can be secured between the L-shaped blocks on the other shore, and there is nothing blocking the upper part between the L-shaped blocks and the partition blocks. And enable effective land use.

[0010] The term "habitat environment conserving member" as used herein means a habitat for aquatic organisms such as aquatic plants and fish, such as natural stones, concrete blocks, bricks and other pottery, sand, mesh metal, and other porous materials. Is what you do. In this overhanging waterway for ecosystem preservation, a through hole communicating with the backfill stone on the reserve side was provided in the side plate of the U-shaped block or the L-shaped block. This allows the spring water to permeate into the water channel.

A U-shaped block or an L-shaped block is used on at least one shore, and a partition block is provided near the tip of the bottom plate of the U-shaped block or the L-shaped block. An ecosystem conservation overhanging channel characterized by the provision of formation means. The term turbulence formation means here means that even if the water flowing down the water channel is laminar, the presence of the partition block causes turbulence and supplies fresh water to the ecosystem conservation area. Say. Examples of the turbulent flow forming means include a protrusion provided in the partition block in a direction perpendicular to the flow path, a curved portion, and a through hole provided in the upper portion of the partition block. The random arrangement of the partition blocks connected in series is also effective for forming a turbulent flow. The random arrangement means changing the distance from the shore when installing the partition block,
It means that it is provided intermittently.

Further, the partition block may be provided with a means for guiding water to the ecosystem conservation area. As the water conveyance means, a concave groove, an inclined wall,
Alternatively, a concave groove or a protrusion provided on the upper surface of the partition block and having a downstream side inclined toward the ecosystem conservation area can be given.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional view of an overhanging canal for ecosystem conservation according to the present invention, and FIG. 2 is a perspective view showing an assembled state of blocks constituting the canal. As is apparent from these figures, the overhanging canal for ecological conservation according to the present invention has a U-shaped block 1 arranged on one shore (left side in the figure) inward of the canal and another shore (right side in the figure). The L-shaped block 2 is arranged with the bottom plate facing the inside of the water channel. A partition block 3 is disposed at the tip of the bottom plate of the L-shaped block 2. The partition block 3 is a strip-shaped elongated member, and the top 3a has a height below the water surface at the planned flow rate. A cast-in-place concrete layer 4 is formed between the partition block 3 and the U-shaped block 1 on the other shore. These are arranged on a foundation concrete 6 formed on a crushed foundation stone 5.

As described above, when the U-shaped block 1 is arranged on one shore and the L-shaped block 2 is arranged on the other shore to form a waterway, the width of the waterway can be arbitrarily designed and constructed. The U-shaped block 1 can secure a cross section of water passage, and the presence of the overhang portion 1a of the U-shaped block 1 enables effective land use, such as using the upper portion of the overhang portion for a sidewalk or the like. For this purpose, a guard member mounting hole 1b is provided at the edge of the overhang. Also, the L-shaped block 2 side has no overhanging portion, so it has good lighting and is most suitable for ecosystem conservation.
A compartment for ecosystem conservation can be provided above.

The ecosystem conservation area 7 is formed by arranging the partition block 3 at an arbitrary position at the end of the bottom plate 2a of the L-shaped block 2 in the center of the channel. It is significant that the ecosystem conservation area 7 is formed in this part with good lighting. As described above, the partitioning block 3 is set at a height such that the top 3a is below the water surface at the planned flow rate, so that water supply to the ecosystem conservation area 7 is ensured, soil inflow and habitat environment conservation component outflow occur. It has a soil retaining action to prevent Further, the presence of the partition block 3 has an effect of forming various flows. In this example, the ecosystem conservation area 7 is filled with a rubble stone 8 as a habitat conservation material (a material capable of reproductive conservation).

FIG. 3 is a cross-sectional view of an overhanging canal for ecosystem conservation according to another embodiment of the present invention. As in the previous embodiment, the U-shaped block 1 is arranged on one shore, the L-shaped block 2 is arranged on the other shore, and the partition block 3 is arranged at the tip of the bottom plate 2a. The bottom plate 2a has a bottom plate through-hole 2b.
To form a stable ecosystem conservation area 7 without runoff. The bottom of the ecosystem conservation area 7 is lower than the maximum floor slab height P formed by the cast-in-place concrete layer cast between the partition block and the other bank U-shaped block. Is made possible. Further, the side plate of the L-shaped block 2 is provided with a side plate through-hole 2c communicating with the backing stone 9 on the reserve side, so that spring water is allowed to permeate into the water channel. By similarly providing the through-holes in the cast-in-place concrete layer 4 and the foundation concrete 6, the spring water can be transmitted through the water channel. Further, the environment can be further considered by devising such as embedding cobblestone or the like in cast-in-place concrete.

FIG. 4 shows an example in which, in addition to the ecosystem conservation area 7 provided on the L-shaped block 2 side, the partition block 3 is also arranged on the U-shaped block 1 side to provide an ecosystem conservation area 10. The ecosystem conservation area 10 provided here has less solar radiation than the ecosystem conservation area 7 on the L-shaped block 2 side. However, it is an area suitable for the growth of plants that require less solar radiation because aquatic organisms can live in a hidden state that cannot be seen from the upper part of the waterway. Also, by changing the height of the partition block 3 on the L-shaped block 2 side and the U-shaped block 1 side and the filling amount of the habitat environment preserving member 8, various ecosystem conservation areas can be created. In FIGS. 3 and 4, the copy plate 19 is projected from the back side of the U-shaped block 1. When the copy plate 19 is protruded in this manner, the reaction force is reduced, and an effect of increasing stability is obtained.

In the overhanging canal for ecosystem preservation of the present invention, the arrangement and shape of the partition block 3 are particularly improved so as to maintain the preservation of ecosystem well. Therefore, first, even if the water flowing down the water channel is in a laminar state, the turbulence is generated by the presence of the turbulence forming means of the partition block 3 so that fresh water is supplied to the ecosystem conservation area. I have to. 5 to 11 are perspective views showing the arrangement of the partition block 3 having the function. FIG. 5 shows an example in which two different heights are arranged in the partition block 3 and the projections 11 and the depressions 12 are formed alternately in a direction perpendicular to the flow direction of the flow passage. The top of the depression 12 is below the water surface at the planned discharge. As shown in FIG. 6, the partition block 3 may be formed in an uneven manner so that the top portion becomes the protrusion 11 or the depression 12. FIG. 7 shows an example in which a through hole 13 is provided above the partition block 3 as a turbulent flow forming means. The top of the partition block 3 reaching the through hole 13 is below the water surface at the planned flow rate. Even if the water flowing down the waterway is laminar, the water flowing down the waterway enters and exits through the through-hole 13 of the partition block 3, causing disturbance and fresh water being supplied to the ecosystem conservation area 7. .

FIG. 8 shows an example in which the partition block 3 is formed in a curved shape. By connecting a plurality of blocks in the downflow direction of the water channel, the partition block 3 becomes wavy, and the water flowing down the water channel is disturbed. As shown in FIG. 9, the partition block 3 in which the downstream side is wider than the upstream side or vice versa is also provided with turbulence forming means, and as shown in FIG. 10, the downstream side is higher than or upstream of the upstream side. The reverse partition block 3 also has turbulence forming means. Further, the case where the partition block 3 is provided with a projection 14 projecting toward the ecosystem conservation area 7 as shown in FIG. 11 is also preferable because the water flowing down in the ecosystem conservation area 7 is disturbed. As a turbulence forming means for supplying fresh water to the ecosystem conservation area due to the occurrence of turbulence, in addition to this, when the partition block is installed, the distance from the shore of the partition block 3 is changed, or the partition block 3 is used. It may be provided intermittently.

FIGS. 12 to 17 are perspective views of an example in which the partition block 3 is provided with a water guiding means so that fresh water is supplied to the ecological conservation area. FIG. 12 shows an example in which a concave groove 15 is provided on the wall surface of the partition block 3 on the ecosystem conservation area 7 side as a water guide means. Even if the ecosystem conservation area 7 is filled with rocks such as habitat as a habitat environment conservation member, water flows down the groove 15 and fresh water is supplied to the ecosystem conservation area 7. As shown in FIG. 13, the ecosystem conservation area 7 side of the partition block 3 may be formed as an inclined wall surface (having a trapezoidal cross section different from the upper and lower sides).

FIG. 14 shows an example in which the distance from the shore of the partition block 3 is changed when the partition block is installed so that fresh water is supplied from the gap 16 to the ecosystem conservation area 7 as the water guide means. Further, as shown in FIG. 15, when a partition block 3 having a triangular bottom plate 3a is used so that the distance from the shore is wider on the upstream side than on the downstream side, the U-shaped block and the L-shaped block 2 conform to the same standard. In addition to the use of an object, an opening 17 can be provided for water flow. Contrary to this, if the partition block 3 is formed so that the distance from the shore of the partition block 3 is narrower on the upstream side than on the downstream side, as shown in FIG. Various riverbed structures can be created by sedimentation and runoff on the bottom slab. In the gap 16 and the opening 17, the movement of benthic organisms is easy.

Further, as shown in FIG. 17, even when a concave groove 18 whose downstream side is inclined toward the ecosystem conservation area 7 is provided on the upper surface of the partition block 3, fresh water can be supplied to the ecosystem conservation area 7. Therefore, it becomes a water conveyance means. In particular, in this case, there is little outflow of habitat conservation members such as chestnut stones, and there is a feature that no formwork is required at the time of cast-in-place concrete.

[0023]

The overhanging waterway for ecological preservation of the present invention has a simple U-shaped block, an L-shaped block, and a partitioning block, so that standard products can be used. Can construct a wide waterway. Even when using general-purpose blocks that do not increase costs,
(Planned water volume). Create and provide an environment suitable for diverse ecosystems and maintain it well. In addition, effective land use can be made possible.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an overhanging canal for ecological conservation according to the present invention.

FIG. 2 is a perspective view showing an assembled state of blocks constituting the water channel.

FIG. 3 is a cross-sectional view of an ecosystem conservation overhanging canal according to another embodiment of the present invention.

FIG. 4 is a cross-sectional view of another embodiment of an ecosystem conservation overhanging canal.

FIG. 5 is a perspective view showing an arrangement of partition blocks.

FIG. 6 is a perspective view showing an arrangement of partition blocks.

FIG. 7 is a perspective view showing an arrangement of partition blocks.

FIG. 8 is a perspective view showing an arrangement of partition blocks.

FIG. 9 is a perspective view showing an arrangement of partition blocks.

FIG. 10 is a perspective view showing an arrangement of partition blocks.

FIG. 11 is a perspective view showing an arrangement of partition blocks.

FIG. 12 is a perspective view showing an arrangement of partition blocks.

FIG. 13 is a perspective view showing an arrangement of partition blocks.

FIG. 14 is a perspective view showing an arrangement of partition blocks.

FIG. 15 is a perspective view showing an arrangement of partition blocks.

FIG. 16 is a perspective view showing an arrangement of partition blocks.

FIG. 17 is a perspective view showing an arrangement of partition blocks.

FIG. 18 is a sectional view of a conventional ecosystem conservation waterway.

FIG. 19 is a cross-sectional view of a proposed ecosystem conservation overhang channel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 U-shaped block 2 L-shaped block 3 Partition block 4 Cast-in-place concrete layer 5 Foundation crushed stone 6 Foundation concrete 7 Ecosystem conservation area 8 Kuriishi 9 Backfill stone 10 Ecosystem conservation area 11 Protrusion 12 Depression 13 Through hole 14 Protrusion 15 Concave groove 16 Clearance 17 Opening 18 Concave groove 19 Preprint

Claims (7)

[Claims] 1. A U-shaped block on one shore and an L-shaped block on another shore
And a partition block provided near the tip of the bottom plate of the L-shaped block, and a bottom plate block or a cast-in-place concrete layer provided between the partition block and the other U-shaped block. An overhanging waterway for ecosystem conservation characterized by the fact that is below the surface at the planned discharge. 2. A U-shaped block on one shore and an L-shaped block on another shore.
A top block of the L-shaped block, a partition block provided near the tip of the bottom plate of the L-shaped block, and a bottom block or a cast-in-place concrete layer provided between the partition block and the other U-shaped block. Is below the water surface at the planned discharge, the bottom of the ecosystem conservation area formed between the L-shaped block and the partition block is lower than the maximum floor slab height, and the ecosystem conservation area is filled with a habitat environment conservation member. An overhanging waterway for ecosystem conservation. 3. The overhanging canal for ecosystem preservation according to claim 1, wherein the side plate of the U-shaped block or the L-shaped block is provided with a through hole communicating with the backfill stone on the reserve side. 4. A U-shaped block or L-shaped block is used on at least one shore, and the U-shaped block or L-shaped block is used.
What is claimed is: 1. A waterway in which a partition block is provided near the tip of a bottom plate of a letter-shaped block, wherein said partition block is provided with turbulence forming means. 5. The ecosystem according to claim 4, wherein the turbulent flow forming means of the partition block is a projection perpendicular to the flow direction in the flow path, a curved shape, a through hole in the upper part of the partition block, and a turbulent arrangement of the partition block connected continuously. System maintenance overhang waterway. 6. A U-shaped block or L-shaped block is used on at least one shore, and the U-shaped block or L-shaped block is used.
What is claimed is: 1. A waterway in which a partition block is provided near the tip of a bottom plate of a character-shaped block, wherein said partition block is provided with a water guide means to an ecosystem protection area. 7. The partition block is provided with a groove, an inclined cross section, or an inclined wall provided on the ecosystem conservation area side of the partition block, or a concave section provided on the upper surface of the partition block inclined on the ecosystem conservation area side. The ecosystem conservation overhanging canal according to claim 6, which is a groove or a projection.