JP3025831U - River crossing structure where fish can easily climb - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention aims to provide a river crossing structure with sufficient consideration for fish. [Structure] A river crossing work installed in a river 1, in which a descending slope 2, a horizontal pool 3 and a descending slope 2 are continuously arranged in this order from above to below, A fishway that communicates with the horizontal pool section 3 is formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a river crossing structure installed in a river where fish easily climbs and a construction method thereof.

[0002]

[Problems to be solved by conventional techniques and devices]

 Conventionally, river maintenance has been carried out in accordance with river rehabilitation plans. For example, such river maintenance works include revetment work on the river banks on the left and right of the river, and weirs and floor works as described in detail below.

Here, the weir and the floor stop are appropriately installed in the river from the viewpoints of preventing the flow of soil and the like in the river to measure the stability of the river bed, and controlling flood control and water utilization.

When constructing a weir or a floor stop, water spatters and a floor protector are installed side by side in order to prevent the river bottom from being scraped off by falling water flowing from the top of the weir or the floor stop. It is common.

By the way, as interest in the environment (nature) is increasing more and more in recent years, rivers and living things (mainly fishes) living in rivers are no exception, and have been considered from the viewpoint of ecological consideration. The following problems have been pointed out in the weirs and floor stop works.

Since the weir and floor stop divide the river into an upstream side and a downstream side, it is impossible to prevent the fish from going up and down at this point, and it is inevitably tall and steep in terms of flood control and water use. In this respect, there may be problems such as preventing fish from going up and down. Even if the slope is constructed gently, the distance of the fishway is extended, and there are many cases where the fish cannot climb the fishway at a stretch.

[0007] In the first place, conventional weirs and floor stoppers are often works made of concrete, so that the surface is flat and unfavorable for fish, and it is very artificial. However, it also has the drawback of spoiling the natural landscape.

In addition, the weir and the floor stop are first to completely stop the river water in the transverse direction of the river and to divert the water to the other, and then to stop the river so that concrete is appropriately provided on the exposed ground. It is constructed through the process of placing it and curing it after concrete curing. Therefore, since the construction method is very troublesome, the construction period is required to be long, and there is a drawback that the cost is further increased, and further, the extension during the construction period is not preferable for the fish. For example, construction during the spawning season when fish run upstream would be fatal to the fish.

[0009] In the end, the dams and floor works that have been used up to now lack sufficient consideration for fish and nature.

The present invention solves the above-mentioned problems, and provides a river-crossing structure installed in a river, which gives sufficient consideration to fish and nature, and can be efficiently processed, and a construction method therefor. is there.

[0011]

[Means for Solving the Problems]

 The gist of the present invention will be described with reference to the accompanying drawings.

[0012] A river crossing workpiece installed in a river 1, in which a descending slope 2, a horizontal pool 3 and a descending slope 2 are continuously arranged in this order from above to below the slope 2. The present invention relates to a river-crossing structure in which a fishway is formed, which is characterized by forming a fishway communicating with the horizontal pool section 3.

In the cross-river structure according to claim 1, the descending inclined portion 2, the horizontal pool portion 3, and the descending inclined portion 2 are repeated in this order from the upper side to the lower side as a whole. The present invention relates to a river-crossing structure in which fish are easily climbed, which is characterized by a stepped structure.

In the river crossing structure according to claims 1 and 2, the present invention relates to a river crossing work product in which a descending slope portion 2 is formed by connecting blocks 4 vertically and horizontally so that fish easily climbs. is there.

The river crossing structure according to any one of claims 1 to 3, wherein the descending inclined portion 2 and the horizontal pool portion 3 are configured so as to incline downward toward the center in the river transverse direction. It is related to a river crossing structure in which a fish easily climbs.

The river crossing structure according to any one of claims 1 to 4, wherein the descending slope portion 2 and the horizontal pool portion 3 are formed with a lower portion 6 having a predetermined width, and each descending slope portion 2 and the horizontal pool portion. The present invention relates to a river-crossing structure in which a fish easily climbs, characterized in that the lower part 6 of the part 3 is configured so as to form a single recess 7 that is continuously provided in the longitudinal direction of the river.

The river crossing structure according to any one of claims 1 to 5, wherein the lower part of the water flow in the connecting portion of the horizontal pool portion 3 and the descending inclined portion 2 is formed in a curved shape. It relates to river crossing structures that are easy to climb.

In the river crossing work piece according to any one of claims 1 to 6, the inner front surface of the horizontal pool portion 3 is formed as an upslope 8 and the front surface of the horizontal pool portion 3 is located at the lower side. The present invention relates to a river-crossing structure in which a fish easily climbs, which is formed on a rising surface 9 that conceals the rear surface of the descending inclined portion 2.

A method of constructing a river crossing work to be installed in a river 1, wherein a predetermined length in the transverse direction of the river is dammed by a lateral damming means 10, and a predetermined length in the longitudinal direction of the river is provided at the end of the lateral damming means 10. The vertical direction damming means 11 for damming down the dam is arranged in series, and the block 4 according to claim 3 is installed in the part surrounded by the both damming means 10, 11 to form the descending inclined portions 2 at a predetermined interval. A horizontal pool portion 3 is formed between the descending inclined portions 2, and subsequently, the opposite side of the river 1 is similarly dammed by the transverse direction damming means 10 and the longitudinal direction damming means 11 and the same descending tilted portion as described above. 2. Construction of a river crossing structure in which a horizontal pool part 3 is formed and a river crossing structure is constructed by connecting the down sloped part 2 and the horizontal pool part 3 formed as described above to each other, which makes it easy for fish to climb. It relates to the law.

[0020]

[Action]

 The horizontal pool area is a resting place for fish to go up and down.

Further, since the horizontal pool portion is present, the gradient of the entire workpiece can be formed as gently as possible by appropriately setting the length of the horizontal pool portion (length in the river longitudinal direction).

[0022]

【Example】

 The drawings illustrate one embodiment of the present invention, which will be described below.

The drawing shows a case where concrete blocks 4 are vertically and horizontally connected to form a plurality of downward inclined portions 2, and a horizontal pool portion 3 is formed between the downward inclined portions 2.

The downward slope 2 and the horizontal pool 3 are formed in a downward slope toward the center of the river crossing direction, and the downward slope 2 and the horizontal pool 3 are set lower than both sides at the center of the river crossing direction. A lower portion 6 having a predetermined width is formed, and the lower portion 6 of each of the descending inclined portions 2 and the horizontal pool portion 3 is formed as a single recessed strip 7 continuously provided in the longitudinal direction of the river. Is made.

The block 4 has a water storage portion 4a formed in the center thereof, and a projection 4b for guiding the water of the river is formed in the front portion where the water flows down. Are formed in a curved shape so that they can flow down well (see FIGS. 5 and 6). The curved shape makes it difficult for bubbles and vortices to occur when water flows down, and makes it easier for fish to go up. The projection 4b also plays the role of making the block 4 look like a natural stone.

Further, the horizontal pool portion 3 secures water retention by an appropriate means, for example, a concrete mat 14, if the base has a high water permeability. If the substrate has good water retention and there is no risk of scour of the substrate, no action is required.

In addition, since the inner front surface of the horizontal pool portion 3 is formed as the upward sloped surface 8, water will flow down well (the projections 4b of the block 4 are curved. Same meaning, see FIG. 6).

Further, the front part of the horizontal pool part 3 is formed on the rising surface 9 so as to conceal the rear part of the lower descending slope part 2 (see FIG. 6). The falling water is prevented from pressing the downward slope 2 on the lower side, and in this respect, the strength against the water flow is improved and the effect of adjusting the water flow is obtained.

Reference numeral 12 is a ground stone, 13 is a natural stone (for landscape and for creating a favorable environment for fish by making a stream in the water and for making a fish habitat), 15 is a floor protector, and 5 is a riverbank of a low waterway. is there.

Next, the construction method of this embodiment will be described (see FIG. 7).

[0031] Up to about half the river crossing direction of the site where the workpiece of the present embodiment is to be constructed is dammed by the sheet pile 10 'as the crosswise damming means 10, and the crosswise direction of the river is measured from the end of this crosswise damming means 10. The embankment 11 'as a vertical direction damming means 11 is cut up to a predetermined length, and the block 4 is immediately laid in the space surrounded by the sheet pile 10' and the embankment 11 'and the descending slope 2 is formed at a predetermined interval. Then, a horizontal pool 3 is formed between the descending slopes 2 and the same, and then the opposite side of the river is similarly dammed to complete the plant crop in the same manner as described above.

If the sheet pile 10 ′ is driven to a predetermined height without being pulled out, it also blocks the water from the upstream side, and exerts an effect of preventing the water from flowing as underflow water under the workpiece.

Since this embodiment has been described above, it has the following features.

It is possible to secure the horizontal pool part 3 and the water pool part 4a where fish rest. The horizontal pool portion 3 and the water reservoir portion 4a create a fast flowing portion and a gentle rolling portion in the fishway, which makes the fishway as natural as possible.

Since the descending inclined portion 2 and the horizontal pool portion 3 are inclined in the center and there is a concave line 7 formed by the low part 6 in the center, at least this concave line 7 is required even when the amount of water is small. Is kept water and therefore the fishway will not disappear.

Since the descending inclined portion 2, the horizontal pool portion 3, the descending inclined portion 2, ... Are connected in series, the length L ′ of the descending inclined portion 2 and the length L of the horizontal pool portion 3 are The setting makes it possible to make the gradient of the entire workpiece as gentle as possible.

In the present embodiment, the horizontal pool portion 3 divides it in the longitudinal direction, and the whole is not an integral body, so that it is possible to secure durability against the lifting pressure from the river. Since the descending slope portions 2 are also formed by connecting the blocks 4 which are independent from each other, the uplift pressure property is enhanced also in this respect.

Since the descending slope 2 has a structure in which blocks 4 are connected in series, it adapts well even if the riverbed is deformed due to flooding or water erosion over a long period of time, and is well-adapted (flexibility). At this point, the durability of the descending inclined portion 2 becomes good. Further, since the block 4 is used to form the descending slope part 2, even if a part of the descending slope part 2 (block 4) is damaged due to unexpected conditions such as flood, the block 4 is replaced. It can be easily repaired by simply doing this, and maintenance becomes easier in this respect.

Since the above-mentioned device is applied to the front part of the block 4 and the inner front surface of the horizontal pool part 3, there is no obstruction to the run-up / fall of the fish.

Since the front portion of the horizontal pool portion 3 is configured so as to cover the rear portion of the downward sloped portion 2 located on the lower side, the durability is improved as described above.

In this embodiment, since concrete is not poured, the construction can be performed without making it dry, and naturally the curing period is not required. Therefore, the construction period can be shortened and the construction in consideration of the ecosystem is possible. It becomes law.

[0042]

[Effect of device]

 Since the present invention is configured as described above, it is possible to provide a river crossing structure with sufficient consideration for fish and ecosystem.

[Submission date] October 9, 1995

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction content]

[0001]

[Industrial applications]

 The present invention relates to a river crossing structure installed in a river where fish can easily climb.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

The present invention solves the above-mentioned problems, and provides a river-crossing structure installed in a river, which gives sufficient consideration to fish and nature and enables efficient processing.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Delete

[Brief description of drawings]

FIG. 1 is an overall perspective view of a present embodiment.

FIG. 2 is a longitudinal sectional view of the embodiment.

FIG. 3 is a cross-sectional view of this embodiment.

FIG. 4 is a plan view of the present embodiment (the water reservoir 4a and the protrusion 4b are drawn only in two blocks 4, and the rest are not shown).

FIG. 5 is a perspective view of a block of this embodiment.

FIG. 6 is an explanatory diagram of a main part of this embodiment.

FIG. 7 is a construction explanatory view of the present embodiment.

[Explanation of symbols]

 1 River 2 Downward Slope 3 Horizontal Pool 4 Block 6 Low Part 7 Recessed Line 8 Upward Slope 9 Rising Surface 10 Transverse Direction Dams 11 Longitudinal Direction Dams

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] October 9, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Name of device

[Correction method] Change

[Correction content]

[Title of device] River crossing structure where fish can climb easily

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be amended] Scope of utility model registration request

[Correction method] Change

[Correction content]

[Scope of utility model registration request]

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] Explanation of code

[Correction method] Change

[Correction content]

[Explanation of symbols] 1 river 2 downward slope 3 horizontal pool 4 block 6 low part 7 concave 8 upward slope 9 rising surface

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Yoshihiko Miyamoto 700-1, Kizaki-ichi, Hitachiota-shi, Ibaraki Prefecture, Kansai District Construction Bureau Hitachi Construction Office, Ministry of Construction (72) Masami Shirato, Kiichi-ichi, Kisaki-cho, Hitachiota, Ibaraki 700-1 Kanto Regional Construction Bureau, Ministry of Construction, Hitachi Construction Office (72) Inventor Noriyuki Nagatsuka 700-1 Kizakiichicho, Hitachiota, Ibaraki Prefecture 700-1 Kanto District, Construction Bureau Hitachi Construction Office (72) Inventor, Junichi Kaneko Tokyo Metropolitan Government 2-22-18 Minami-Aoyama Minato-ku Japan Platform Co., Ltd.

Claims (8)

[Scope of utility model registration request] 1. A river-crossing structure to be installed in a river, wherein a descending slope portion, a horizontal pool portion, and a descending slope portion are continuously arranged in this order from above to below, and the descending slope portion includes a horizontal pool portion. A river crossing structure where fish can easily climb, characterized by forming a fishway that communicates with. 2. The structure for crossing a river according to claim 1, wherein the descending slope portion, the horizontal pool portion, and the descending slope portion are repeated in this order from top to bottom to form a staircase as a whole. A river-crossing structure that allows fish to climb easily. 3. The river crossing structure according to claim 1, wherein the descending slope portion is formed by connecting blocks vertically and horizontally so that fish can easily climb. 4. The river crossing structure according to any one of claims 1 to 3, wherein the descending slope portion and the horizontal pool portion are arranged so as to slope down toward the center in the river transverse direction. A river crossing structure that makes it easy for fish to climb. 5. The river crossing structure according to claim 1, wherein the descending slope portion and the horizontal pool portion are formed with a low portion having a predetermined width, and the descending slope portion and the horizontal pool portion have a low height. A river crossing structure in which a fish is easy to climb, characterized in that the part is configured as a single concave line that is continuously provided in the longitudinal direction of the river. 6. The river crossing structure according to any one of claims 1 to 5, wherein the lower part of the water flow in the connecting portion of the horizontal pool portion and the descending slope portion is formed in a curved shape. A river crossing structure that is easy to climb. 7. The river crossing structure according to claim 1, wherein the inner front surface of the horizontal pool portion is formed as an upward slope, and the front surface of the horizontal pool portion is located on the lower side. A river crossing structure where fish easily climbs, which is formed on the rising surface that hides the rear surface of the descending slope. 8. A method for constructing a cross-river structure to be installed in a river, wherein a predetermined length in the transverse direction of a river is dammed by a lateral damming means, and a predetermined length in the longitudinal direction of the river is dammed at the end of the damming means. A vertical pool damming means is provided in series, and the blocks according to claim 3 are installed in a portion surrounded by these damming means to form descending inclined portions at predetermined intervals and a horizontal pool between the descending inclined portions. And then the other side of the river is also dammed by transverse damming means and longitudinal damming means, and the same descending slope portion and horizontal pool portion are formed to form the descending slope portion and horizontal pool. A method for constructing a river-crossing structure in which fish can easily climb, characterized by constructing a river-crossing structure in a continuous manner with the department.