KR20110117857A - Multistage weir having rapids and puddles for an ecological river and construction method of rapids and puddles - Google Patents

Abstract

The present invention relates to a multi-stage ecological river underwater beam and its construction method that allows aquatic organisms to inhabit, and more specifically, to install the underwater beam in multiple stages spaced apart at regular intervals from the upstream side to the downstream side, Subsequently, the shallows of the aquatic habitat space deeper than the bedrock, and the deep trenches extending deeper than the bedrock in the downstream flow direction, form an esophagus, providing ample depth for habitats and hiding places for fish and aquatic life. In addition, the multi-stage ecological river underwater walk with a shoal and underwater ditch where fish can inhabit by maintaining a minimum depth of water even when the water level in the river water is low or the bottom of the river is low and the river water lacks, will be.

Description

Multistage weir having rapids and puddles for an ecological river and construction method of rapids and puddles}

The present invention relates to a multi-stage ecological river underwater beam and its construction method that allows aquatic organisms to inhabit, and more specifically, to install the underwater beam in multiple stages spaced apart at regular intervals from the upstream side to the downstream side, Subsequently, the shallows of aquatic animal habitat spaces deeper than the riverbed, and the deep trenches extending from the shoal to the downstream flow direction, form a fishery, providing sufficient depth for habitats and hiding places for fish and aquatic life. In addition, the multi-stage ecological river underwater walkway with a stream and underwater ditch where fish can inhabit by maintaining a minimum depth even when the water level is low or the bottom of the river is exposed is low. will be.

As is well known, underwater beams are made to deplete water in rivers, agricultural waterways or reservoirs due to lack of water due to changes in the natural environment, and are made to efficiently utilize water resources. On a slope, river water flows on a steep slope like a waterfall.

Since these underwater beams are usually made of concrete and their slopes are formed high, the upstream and downstream movements of the fish are disrupted, resulting in ecosystem disturbance and destruction, as well as the environment in which fish and aquatic life can live, i.e. plants Most of these plants have failed to settle.

In addition, the existing underwater beams do not have a constant flow of river water due to changes in the natural environment such as flood droughts. That is, because the flow rate is fast and the flow rate is high, the fish can be safely moved up and down, and the fish can hide. In most cases, there is not enough space for the fishery and it loses its function as fishery.

For example, as a technique for forming an esophagus on one side of a submerged beam, a separate fishery is formed on one side of the beam connecting the top and bottom of the beam step by step so that the water descending from the underwater beam stays in the groove of the stepped block to slow the flow rate. In some cases, the fish may use less force and go up by making the flow rate constant, but this is because the habitat of aquatic organisms due to artificial materials is weak and the water is insufficient, which causes the fish to lose its function as fish. It was difficult.

In this regard, the present applicant has applied for and registered Patent No. 0486920, “Natural log underwater beam structure” (registered on May 2, 2005), and the eco-natural log underwater beam structure is a stream as shown in FIGS. 1 to 3. Submerged beams (1) consisting of anti-corrosive cylindrical logs placed on the riverbed while blocking the flow of rivers to raise the water level of the upstream and crossing the both eyes of the submerged beams (1), and are arranged at regular intervals on the upper and downstream sides of the underwater beams (1). The fixed pile 2 fixed to the bottom of the river while being in contact with the main surface of the fixed beam 2 and the fixed pile 2 on the upper and downstream sides of the underwater beam 1 to be integrally fixed. And anchored to the bottom of the river in the state connected by the anchor bolt (4), the lower portion of the underwater beam (1) and the ring to prevent the lower phase of the bottom of the underwater beam (1) to support the lower portion of the underwater beam (1) and At the same time the underwater beams ( 1) is placed on the upper support side and the lower side of the submerged beams (1) along the outer periphery of the submerged beams (1) and the support piles (2) and the center support piles to prevent the rise of up (6) together with a plurality of support stones (7) consisting of a predetermined size of megaliths supporting the underwater beams, and a vegetation plant (eg, lying down willow) inserted between the support stones (7) to form a habitat for aquatic organisms ( 9) characterized by consisting of. Where 8 is the plan.

This conventional natural natural log underwater beam structure has a log cylindrical log that functions as an underwater beam naturally placed on the riverbed, and as time passes, there is a gap between the log and the riverbed that aquatic creatures can enter and exit. It is proposed as an environmentally friendly composition that can help the aquatic organisms to communicate naturally and upstream and downstream, and provide natural hides and nests of aquatic organisms in the gaps between the megaliths around the preservative cylinders. It became.

However, this pre-registration technique is a case in which the underwater beam is installed alone across the river, and the water level is rapidly lowered on the boundary of the underwater beam, so that the flow rate of the water proceeds rapidly and is discharged quickly to the downstream side, so that the time for the river water to stay is short. If this is required for a long time, it is not suitable.

In particular, when the water level is low due to lack of river water, or when the water level is low, or when the bottom of the riverbed is exposed, that is, when the water in the river is depleted due to summer drought, or when the water does not flow due to snow, freezing in winter, etc. This lack of water directly affects the river ecosystem, making it difficult for fish, etc. to travel upstream, and the lack of habitats as diverse habitats and hiding places for fish and aquatic organisms. There was a problem.

Accordingly, the present invention has been devised to solve the conventional problems as described above, the object of which is from the upstream side to the downstream side of the underwater borough which is installed as an eco-friendly log in order to ensure that fish upstream safely and comfortably By installing a plurality of underwater beams in multiple stages spaced at regular intervals, they have a storage function to secure the quantity of river water by delaying the flow of water in stages between different levels of water beams, while providing minimum fishery space and fishery function during the dry season. It is to provide a multi-stage ecological river underwater walk with a shoal and underwater ditch that can be a habitat and hiding place for fish and aquatic life by having deeper shoals and underwater ditches than the riverbed.

In addition, it is an object of the present invention to form a stream of water through the multi-stage underwater beams and underwater ditch, so that the flow rate of the river water is made smoothly, and also provides upstream of fish and the like by providing aquatic and fishery space in which aquatic plants are settled. The present invention provides a multi-stage ecological river underwater beam and its construction method, which are equipped with shoals and underwater trenches to facilitate the habitat of fish and aquatic organisms.

In addition, it is an object of the present invention to form a stream of water through the multi-stage submerged to have an aeration function in the occurrence of the fall of the river water to increase the self-cleaning power to prevent oxygen supply, as well as sludge deposition in the river water, It is to provide a multi-stage ecological river underwater walk with a shoal and underwater ditch and its construction method to provide environment-friendly hydrophilic space by improving landscape and refreshing feeling due to river water fall occurrence.

In order to achieve the object of the present invention, the present invention is provided with a plurality of log beams that cross the both sides of the river are installed in a plurality of spaced apart at regular intervals in the flow direction of the river, each underwater beam is disposed in the transverse direction Cylindrical wood stacked one or more stages, and a pair of fixed piles that are in close contact with the outer circumferential surface at every position of the cylindrical wood and are connected to the cylindrical wood with anchor bolts from the upper side and fixed at the lower end thereof. And, consisting of megaliths supported along the outer surface of the cylinders and the fixed piles, each of the underwater beams stacked and stacked in the cylindrical wood is lowered so that the water level decreases in the flow step toward the downstream underwater beams It is installed in the form of losing, and each of the underwater beams form a fishery space of a shallow deeper than the lower bed side by side on the lower side thereof, It is respectively communicated with is characterized in that the formation of streams in the width direction at regular intervals in a number of spaced deep underwater ditch than discrete charge image to each other so as to have a function as the least is provided extending in the leading direction of flow.

In addition, the underwater ditch is characterized in that it extends from the upstream side to the position of the underwater beam located on the downstream side.

In addition, the underwater ditch is characterized in that it is formed in a form that is gently curved along the flow direction of the flow.

In addition, the shoals and underwater ditch is characterized in that the excavated in a certain width and depth from the lower bed made of an inverted trapezoidal cross-sectional shape consisting of both side walls and the bottom.

In addition, the shoals and underwater ditch is characterized in that the width and depth of about 1 ~ 1.5m formed.

In addition, the shoals and underwater ditch is characterized by planting the waterside aquatic plants to help in wildlife habitat.

In addition, the shoals and underwater ditch are provided with rubble layers in which rubble and gravel are filled from the inside of the lower bed ground on the wall and bottom along the trapezoidal cross-sectional shape, and a water-permeable fiber band made of geotextiles supporting the rubble layer. The inclined support piles are tightly supported on the outer surface of the water-permeable fiber band and are fixed in the lower ground along both wall surfaces and installed at regular intervals, and the support trees in the transverse direction along the longitudinal direction at a predetermined height position of the inclined support piles are integrally formed. It is connected to the structure, characterized in that it is installed as a U-shaped fixture which is fixed in the lower ground through the water-permeable fiber band at a predetermined interval from the inclined support pile and the transverse support wood.

In addition, the present invention is a method of constructing an ecological river underwater beam consisting of cylindrical trees placed on the river while crossing the both sides of the river to block the flow of the river to increase the water level in the upstream, the log beam-shaped underwater beam in the direction of the river flow Steps to install a plurality of each of the underwater beams in such a way that the water level is reduced in each step by step spaced apart; Digging sideways side by side of each underwater beam and an underwater ditch communicating with the shoal and extending in a flow direction in a flowing direction in a deep trapezoidal cross-sectional shape than the bottom; Forming a sidewall and a bottom by filling a filling stone such as rock and crushed stone and an excavated soil along the cross-sectional shape of the excavated ground; Laying a water-permeable fiber cloth made of a permeable forge so as to cover the sidewall and the bottom surface filled with the excavated soil and the filling stone; Fixing a plurality of inclined support piles to the base at regular intervals along the sidewalls; Connecting a plurality of rows of trees in the transverse direction to the inclined support piles fixed to the base; And penetrating the water-permeable fiber band from the outer surface of the inclined support tree connected to the horizontal tree to the U-shaped fixture and fixing it to the base plate.

As described above, the present invention installs a plurality of submerged beams having different levels in the river in a multi-stage manner so that the river water on the upstream side has a storage function to secure a sufficient quantity of the stored river without rapidly changing to the low water level on the downstream side. At the same time, it is possible to maintain the depth needed for fish farming by forming rivers and underwater trenches with lower depths than the riverbed in the underwater beams of each stage, even in the changing natural environment where the bottom of the riverbed is exposed during the dry season. It provides space, that is, fishery spaces and fisheries, to become habitats and hideouts for fish and aquatic organisms, thus conserving ecosystems.

In addition, it is possible to reduce the flow rate of the water by securing the stability of the structure according to the prevention of scour, and to reduce the water flow rate by the water protection stones installed on the bottom, so that the fish can go upstream more comfortably and safely. In addition, the aquatic plants such as plants and plants are planted in the shoals and aquatic ditches, creating a habitat for fish and aquatic organisms, which can further increase the ecological preservation efficiency.

In addition, the present invention is configured to have the left and right slopes of the upstream submerged beams, the middle and submerged submerged beams and the downstream submerged beams in opposite directions alternately with each other so that the streams can flow smoothly in the left and right directions at the same time as the stream flows from the upstream to the downstream. It is possible to delay and extend the passage time of the river water inside the underwater beam of the, which has the advantage of reducing the flow rate of the river water.

In addition, the present invention has an aeration function as a drop phenomenon that occurs through the various stages of the upstream submerged, midstream and downstream submerged, can prevent the supply of oxygen to the river water as well as the sludge deposition to maintain according to the increase in the self-cleaning capacity Management is unnecessary, and it is more natural-friendly because it can secure a hydrophilic space such as improving the scenery of the river with the sound of refreshing water when falling.

1 to 3 show a conventional natural natural log underwater beam structure,
1 is a side view.
2 is a plan view.
3 is an enlarged view of a portion “A” of FIG. 1.
4 is a plan view showing the overall configuration of the present invention.
5 is a side view of FIG. 4.
Figure 6 is a partially enlarged cross-sectional view showing an upstream underwater beam structure of the present invention.
Figure 7 is a partially enlarged cross-sectional view showing a middle class underwater beam structure of the present invention.
8 is a partially enlarged cross-sectional view showing a structure of a downstream underwater beam of the present invention.
Figure 9 is an enlarged cross-sectional view showing the underwater ditch structure and construction of the present invention.
10 is a side view showing a river water drainage state according to the present invention.

Hereinafter, the configuration of the present invention in detail with reference to the accompanying drawings as follows.

Figure 4 is a plan view showing the overall configuration of the present invention, as shown in the present invention is a plurality of underwater beams, that is, upstream underwater beams 10 are spaced apart from each other in the flow direction of the log beam form across both sides of the river Intermediate submerged beams 11 and downstream submerged beams 12 are installed at intervals to have different levels of water, and a plurality of bed guards 13 are provided on the upper and lower sides of the respective submerged beams, and the bottoms of the riverbeds alternate with each other. It is configured to have left and right slopes in the opposite direction so that the river water can be drained from the upstream (A) to the downstream (B) side and drained to the left and right at the same time.

At this time, a plurality of lines (L) denoted by a dashed line is a line of columnar trees (not shown) that are settled on the riverbed at intervals in both directions of the river to fix the riverbed stone 13.

In addition, each of the upstream submersible beams 10, the midstream submersible beams 11, and the downstream submersible beams 12 extends in the flow direction in succession to the shoals 15 and the shoals 15 in the transverse direction, respectively. The plurality of longitudinal underwater trenches 16 are formed to be spaced apart from each other, and the underwater trenches 16 are gently formed to be inclined to one side with respect to the flow direction to be less affected by the flow rate of water.

The shoals and underwater ditches are formed side by side along the both sides of the rivers at the bottom of each underwater beam with a width and depth of 1 ~ 1.5m, separated by the width direction of the river at a predetermined interval is spaced several installed in the flow direction.

 These shoals and underwater trenches are excavated to a lower depth than the bottom of the riverbed to store the river water, so that the amount of river water is not constant due to changes in the natural environment such as floods and droughts. However, even in the dry season, when there is a lack of water in the river water, it always maintains the function of the minimum habitat space, the fishery and the fishery space.

In addition, aquatic plants, such as lying down willows, are planted and settled in these shoals and underwater ditches, which will serve as a hiding place and food for aquatic organisms and insects.

FIG. 5 is a side view of FIG. 4, and as shown therein, the upstream subwater beam 10, the midstream subwater beam 11, and the downstream subwater beam 12 form a step with different heights from each other. The height is gradually lowered toward the underwater beams 11 and the downstream underwater beams 12. That is, the midstream underwater beams 11 are formed at a lower height than the upstream underwater beams 10, and the downstream underwater beams 12 are formed at a height lower than the midstream underwater beams 11. In addition, a number of bed guard seats 13 provided on the bottom of the underwater beam of each stage are fixed by columnar trees 14 fixed to the bed. In this case, the upstream submersible beam 10, the midstream submerged beam 11, and the downstream submerged beam 12 are formed with a transverse shoal 15 on each rear side of the drainage direction from the upstream A to the downstream B side, and the shoals A longitudinal underwater ditch 16, indicated by dashed lines in the drawing at 15, is formed in communication with the shoal 15.

As shown in FIG. 6, the upstream submerged beams 10 are fixed to the lower part at intervals on both sides of the river and are fixed to the lower part and are provided with a front and rear pair of fixed piles 2 provided in a direction draining from the upstream to the downstream side. The first stage upstream lumber (3) is provided on the two-stage index wood (5) supported by the pile (6), and the upstream wood (3) is fixed by the anchor bolt (4) 2) is fixed.

The walnut tree (3) is an emulsified log that is placed on the riverbed across the river to prevent the flow of the river to increase the water level of the upstream, and the fixed pile (2) to prevent corrosion by water It is made of synthetic resin material which is durable against water like PE polymer material. In addition, the lower surface of the index tree (5) and the upper surface of the central support pile (6) are connected to each other using a ring or the like, and the central support pile (6) supports the lower part of the overflow tree (3) and the index tree (5) As well as the function to prevent the rise of the moon tree (3).

And, as shown in Figure 7 the middle-class underwater beams 11 is fixed between the fixed pile (2) provided in the front and rear pairs in the direction of being settled on the lower side and drained from the upstream to the downstream at intervals on both sides of the river, The first stage overflow tree (3) is stacked on the first stage index tree (5) supported by the lower support pile (6), and the overflow stream (3) is fixed to the front and rear by the anchor bolt (4) It is fixed to (2), the downstream underwater beam 12 is fixed to the fixed pile provided in a pair of front and rear in the direction of being settled in a plurality of rivers and drained upstream from the downstream at intervals on both sides of the river as shown in FIG. Between 2), the first stage upstream wood (3) is provided, the upstream wood (3) is fixed to the front and rear fixed pile (2) by the anchor bolt (4).

On the other hand, the construction method of the multi-stage ecological river underwater beams equipped with the shoals and underwater trenches of the present invention, as shown in Figure 9, is placed on the river while crossing the both eyes of the river to block the flow of the river to increase the water level upstream In the method of building the ecological river underwater beam consisting of cylindrical logs, log beam-shaped underwater beams are spaced apart at regular intervals in the direction of river flow, so that each of the underwater beams is installed in such a manner that the level of water is reduced by the flow level.

Thereafter, the trench 15 and the underwater trench 16 communicating in parallel with the shoals along the bottom side of each submersible are extended in a predetermined shape in the flowing direction to excavate in an inverted trapezoidal cross-sectional shape with a predetermined width and depth deeper than the bottom. The following is formed by excavating the width and depth of about 1 ~ 1.5m.

On the other hand, the underwater groove 16 extends from the upstream side to the position of the underwater beam located on the downstream side, and is excavated in a form that is gently curved along the flow direction of the flow.

Subsequently, the filling stones 20, such as rocks and crushed stones, and the excavating soil 19 are filled along the cross-sectional shape of the excavated ground to form sidewalls and a bottom to form a waterway, and the excavated soil 19 and filling of this waterway form are formed. A water permeable fibrous band 21 made of a permeable forge is laid so as to cover the side wall and the bottom surface filled with the stone 20. At this time, the water permeable fiber zone 21 is sown or planted the seeds of aquatic plants to perform the function of feeding and hiding places of the aquatic organisms, blocking the sunlight to help the fishes to comfortably enter the upstream to fully function as fishery Create a habitat environment to encourage

Thereafter, a plurality of inclined support piles 17 are fixed to the base at regular intervals along the sidewalls, and then a plurality of rows of crosswoods 18 are connected to the predetermined height positions of the inclined support piles 17 fixed to the base. do.

Thereafter, the lateral wood 18 is penetrated through the water-permeable fiber band 21 to the U-shaped fixture 22 from the outer surface of the inclined support pile 17 is connected to the base.

10 is a side view showing the river water drainage state according to the present invention, as shown in the present invention, between the fixed pile (2) provided in the front and rear pairs in the direction of draining from the upstream to the downstream side, the central support pile (6) Upstream submerged beam (10) consisting of three tiers by stacking three stages of upstream lumber (3) fixed to a fixed pile (2) by anchor bolts (4) on a two-stage index wood (5) supported by the lower part by 1) fixed to the fixed pile 2 by anchor bolts 4 between the fixed piles 2, the anchor bolt 4 on the first stage of the still water tree (5), which is supported by the central support pile (6) Upstream submerged beams (12) are provided with a first-class upstream tree (11) between the fixed pile (2) in the middle class underwater beams (11), the middle level underwater beams (11), which are stacked to form a two-tier (3) The river water on the upstream side suddenly changes to the low water level on the downstream side by forming a step so that the height gradually decreases toward the side. In this case, the water flow rate is reduced and the flow rate of the fish is reduced. It can serve as a habitat and hiding place for living things, thus preserving ecosystems.

In addition, by having an aeration function as a drop phenomenon caused by passing through several stages of the upstream submersible beam 10, the midstream submerged beam 11, and the downstream submerged beam 12, it is possible to prevent the supply of oxygen to the river water as well as sludge deposition. Maintenance is not necessary according to the self-cleaning ability, and the landscape of the underwater walk is improved to generate a refreshing sound of water to provide a hydrophilic space.

In addition, the present invention, because the upstream submarine 10, the middle submarine 11, and the downstream submarine 12 includes a plurality of riverbeds (13), not only has the ability to prevent scour due to falling, but also to the flow rate of water Resistance can reduce the outflow rate of river water and provide an environment for aquatic life.

As described above, the present invention installs the water beams having different water levels, which are installed in the river in the water direction, in a multi-stage manner, so that the river water on the upstream side does not rapidly change to the low water level on the downstream side, thereby reducing the flow rate of the water and storing the river water inside the beam. Simultaneous formation of shoals and underwater ditches in the underwater tiers of each tier allows the preservation of the ecosystem by being the habitat and hiding place of fish and aquatic creatures by the shoals and submerged ditches during the dry season.

In addition, it has an aeration function due to a dropping phenomenon that occurs through several stages of upstream submerged, midstream submerged and downstream submerged, so that it can prevent not only oxygen supply but also sludge deposition in the river water, so maintenance is not necessary due to self-cleaning ability. It will be able to secure a hydrophilic space and provide a more natural friendly underwater walk with a refreshing sound of water.

In the above described the construction method of the multi-stage ecological river underwater beam and the shoals and underwater ditch with the shoals and underwater ditch according to the present invention in detail, but this is only the most preferred embodiment of the present invention, the present invention It is not intended to be limited to, but the scope is determined and defined by the appended claims. In addition, anyone of ordinary skill in the art will be able to make various modifications and imitations according to the description of the specification of the present invention, but it will be apparent that this is also outside the scope of the present invention.

2: Fixed stake 3: Moon tree
4: anchor bolt 5: index tree
6: central support pile 10: upstream underwater beam
11: upstream underwater walk 12: downstream underwater walk
13: River Guard Stone 14: Original Tree
15: Shoke 16: Underwater Ditch
17: inclined support pile 18: crosswood
19: Excavated Soil 20: Filled Stone
21: water permeable fiber band 22: U-shaped fixture

Claims (8)

Install a plurality of underwater beams in the form of log beams across both sides of the river, spaced apart at regular intervals in the flow direction of the stream,
Each underwater beam is arranged in the transverse direction and stacked in one or more stages, and the cylinders are in close contact with the outer circumferential surface of the cylinders at certain positions, and are connected to the cylinders with anchor bolts from the upper side, and the lower end thereof It consists of a pair of fixed stakes fixed to the, and the megaliths supported along the outer surface of the cylindrical and fixed stakes,
Each of the cylindrical beams stacked in the transverse direction are stacked in such a way that the water level decreases in the water flow step toward the downstream underwater beams,
The submerged beams form a locator space of a deeper deeper than the riverbed side by side in succession to the lower side, and several underwater grooves deeper than the riverbed separated from each other at regular intervals in the width direction of the river are connected to each of the streams in the flow direction of the flow of water. Multi-stage ecological river underwater walk with a shoal and an underwater ditch, characterized in that formed to extend and have a function as an esophagus. The method of claim 1,
The underwater ditch 16 is a multi-stage ecological river underwater walk with a shoal and an underwater ditch, characterized in that extending from the upstream side to the position of the underwater beam located on the downstream side. The method of claim 1,
The underwater ditch 16 is a multi-stage ecological river underwater beam with a shoal and an underwater ditch, characterized in that it is formed in a form that gently bends along the flow direction of the flowing water. The method of claim 1,
The shoals (15) and the underwater ditch (16) are excaved to a predetermined width and depth from the bottom of the multi-stage ecological river underwater walk with a shoal and underwater ditch, characterized in that consisting of a cross-sectional cross-sectional shape consisting of both walls and the bottom. The method of claim 4, wherein
The shoals (15) and the underwater ditch (16) is a multi-stage ecological river underwater walk with a shoal and underwater ditch, characterized in that the width and depth is formed about 1 ~ 1.5m. The method of claim 4, wherein
The shoals (15) and the underwater ditch (16) is a multi-stage ecological river underwater walk with a shoal and underwater ditch, characterized in that planted and settled aquatic plants to function as a water plant. The method of claim 4, wherein
The shoals 15 and the underwater ditch 16 have a rubble layer filled with rubble and gravel from the inside of the lower bed on the wall and bottom along its trapezoidal cross-sectional shape, and a water-permeable fiber band made of geotextiles supporting the rubble layer. (21) is laid, the inclined support piles are fixedly supported on the outer surface of the water-permeable fiber band 21 and fixed in the lower bed ground along both side walls and installed at regular intervals, and the length at a predetermined height position of the inclined support piles. The supporting members in the transverse direction are connected in an integral structure along the direction, and are installed as U-shaped fixtures fixed through the water permeable fiber zone 21 at regular intervals from the inclined support pile and the transverse supporting members and fixed in the lower ground. Multi-stage ecological river underwater walk with shoal and underwater ditch. In the method of constructing an ecological river underwater beam consisting of cylindrical wood placed on the river while crossing the both sides of the river to block the flow of the river to increase the water level in the upstream,
Installing a plurality of underwater beams having a log beam shape in which water levels are reduced in flow stages by being spaced apart at regular intervals in the flow direction of the stream;
Digging deep into the trapezoidal cross-sectional shape deeper than the lower phase of the shallow neck 15 and the underwater trench 16 communicating in parallel with the shallow neck and extending in a predetermined shape in a flowing direction parallel to the lower side of each underwater beam;
Forming a sidewall and a bottom by filling the filling stone 20 and the excavation soil 19 such as rocks and crushed stones along the cross-sectional shape of the excavated ground;
Laying a water permeable fibrous band 21 made of a permeable forge so as to cover the sidewall and the bottom surface filled with the excavated soil 19 and the filling stone 20;
Fixing the plurality of inclined support piles 17 on the base at regular intervals along the sidewalls;
Connecting a plurality of rows of trees 18 in the transverse direction to the inclined support piles 17 fixed to the base;
Passing through the water-permeable fiber band 21 to the U-shaped fixture 22 from the outer surface of the inclined support pile 17 is connected to the diaphragm 18 and settled on the base; Construction method of multi-stage ecological river underwater beams equipped with.

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