A U-shaped submersible filter dam for aquatic ecological restoration

Abstract

This invention provides a U-shaped submersible filter dam for aquatic ecological restoration, belonging to the field of aquatic ecological environment restoration technology. It addresses the problem that existing dam isolation measures fail to meet navigation and flood discharge requirements, and the lack of isolation facilities hinders the recovery of submerged plants and increases their survival rate. The dam includes sidewalls, a bottom weir, biological baskets, area separation components, and positioning components. Multiple biological baskets are stacked vertically to form the sidewalls, and multiple biological baskets are joined horizontally to form the bottom weir. Multiple sets of area separation components are respectively installed inside the biological baskets. The positioning components are installed inside the sidewalls and the bottom weir. This invention adopts a standardized, modular stacking structure for the biological baskets, facilitating customization according to river width and water depth. Overall, it reduces pollution load without obstructing navigation and flood discharge. Simultaneously, the porous filter media filled in the biological baskets helps improve water quality entering the project area and promotes the recovery of submerged plants.

Description

Technical Field

[0001] This utility model belongs to the field of aquatic ecological environment restoration technology, and more specifically, it relates to a U-shaped submersible filter dam for aquatic ecological restoration. Background Technology

[0002] In water ecological restoration projects, especially those aimed at improving water clarity, ecological problems should be addressed using ecological methods. The overall technical approach should be "foundation building, revegetation, and symbiosis." Foundation building involves controlling turbidity input, shaping micro-topography, controlling pollution sources, and regulating flow velocity to create a suitable ecological environment. Vegetation restoration involves restoring aquatic plant systems to create near-natural aquatic vegetation communities extending from the shoreline to the water body. Animal restoration involves restoring aquatic animal communities to achieve a fish-grass balance, creating a symbiotic, harmonious, and healthy aquatic ecosystem. Existing technical measures for improving the clarity of rivers and lakes can be categorized into five types: isolation, pollution control, purification, regulation, and maintenance. Isolation measures primarily use facilities such as sluices, dams, and weirs to isolate water bodies and improve water clarity. These generally include temporary cofferdams, overflow weirs, movable weirs, and permeable ecological dams.

[0003] Existing application number: CN202421360495.4, this utility model discloses a detachable filter dam for aquatic ecological restoration, comprising: closely spaced round wooden piles arranged side by side in two rows on the riverbed for fixed support; a reinforced concrete foundation covering the closely spaced round wooden piles for reinforcing the bottom of the filter dam; reinforced concrete columns spaced apart on the reinforced concrete foundation for support and fixation; a lattice column set on the reinforced concrete column and detachably connected to the reinforced concrete column; a percolation module detachably connected to the reinforced concrete foundation for water infiltration and purification; a square tube frame detachably connected to the lattice column and connected to the reinforced concrete column for fixing the percolation module; biochemical cotton filling the larger gaps in the percolation module to prevent leakage; and a gabion outer structure placed on the side of the river where it is difficult to place the percolation module.

[0004] Based on the above, for some uncontrolled water bodies, there are often needs for navigation and flood discharge. If isolation measures are constructed, these needs will not be met. The lack of certain isolation facilities will affect the progress of the restoration of submerged plants. The water exchange caused by the rise and fall of river water will not only make it difficult to maintain the transparency of inland rivers, but also increase the difficulty of survival of submerged plants, making it difficult to realize the benefits of the project. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a U-shaped submerged filter dam for aquatic ecological restoration. This addresses the issue that existing methods for creating isolation measures for uncontrolled water bodies often fail to meet the needs of navigation and flood discharge. The lack of adequate isolation facilities hinders the restoration of submerged plants, and the water exchange caused by rising and falling river levels not only makes it difficult to maintain river transparency but also increases the survival rate of submerged plants, ultimately hindering the realization of project benefits.

[0006] The purpose and effectiveness of this U-shaped submersible filter dam for aquatic ecological restoration are achieved through the following specific technical means:

[0007] A U-shaped submersible filter dam for aquatic ecological restoration includes sidewalls, a bottom weir, biological baskets, filter media, area separation components, and positioning components. Two sets of sidewalls are provided, one on each side of the dam body. The bottom weir is located at the bottom of the dam body. Multiple biological baskets are arranged in stacked layers to form sidewalls, and multiple biological baskets are joined side-by-side to form the bottom weir. Multiple pieces of filter media are provided, each filling the interior of a biological basket. Multiple sets of area separation components are provided, each located inside a biological basket. The positioning components are located inside the sidewalls and the bottom weir.

[0008] Furthermore, the biological basket is a single small frame with a specification of 1000*500*500mm, welded from 40*40mm 304 stainless steel square tubes, and the biological basket is welded by argon arc welding; the filter material is composed of volcanic rock or ceramsite with a particle size of 3-5mm.

[0009] Furthermore, the area separation component includes: a perforated plate; the perforated plate is a 304 steel plate with a hole diameter of 55mm and a thickness of 0.5mm, and multiple perforated plates are provided. The multiple perforated plates are welded and fixed inside the biological basket, and the perforated plates arranged horizontally inside the biological basket have a 200*300mm opening reserved inside.

[0010] Furthermore, the area separation component also includes: geotextile; multiple pieces of geotextile are provided, and the multiple pieces of geotextile are respectively fixedly connected to the inner side of multiple perforated plates.

[0011] Furthermore, the positioning component includes: an H-beam fixing pile; the H-beam fixing pile is made of 10# H-beam, and two H-beam fixing piles are provided. The two H-beam fixing piles are respectively fixedly connected to the inner side of the biological basket that makes up the two side walls, and the bottom of the two H-beam fixing piles is embedded more than 1m into the riverbed.

[0012] Furthermore, the positioning component also includes: galvanized steel pipe fixing piles; the galvanized steel pipe fixing piles are made of hot-dip galvanized steel pipes with an outer diameter of 50cm, and multiple galvanized steel pipe fixing piles are provided. The multiple galvanized steel pipe fixing piles are respectively fixedly connected inside the multiple biological baskets that make up the bottom weir, and the bottom of the multiple galvanized steel pipe fixing piles is embedded more than 1m into the riverbed.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] Firstly, a modular, stacked structure is adopted, with the biological baskets being standardized individual small frames that can be prefabricated in the factory. On-site installation only requires splicing and hoisting, making it convenient and eliminating the need for additional foundations such as concrete. The number of splicing units can be customized according to the width and depth of the river channel, and it supports operation while the water is flowing, without the need to drain the river, thus reducing interference with the existing aquatic ecosystem and lowering construction complexity and costs. The side walls and bottom weir form a U-shaped structure, without completely isolating the river channel. Furthermore, the bottom weir is designed to be submerged, which reduces the amount of water from the external river entering the project area and lowers the pollution load, while not obstructing navigation and flood discharge, thus resolving the core contradiction of coexisting isolation and navigation, and flood discharge.

[0015] Secondly, the biological basket is filled with porous filter media such as volcanic rock or ceramsite, which has both permeability and purification properties. The permeability can prevent water accumulation from affecting flood discharge, while the purification property can help improve the water quality entering the project area, further promote the recovery of submerged plants, and enhance the project's benefits.

[0016] This utility model adopts a standardized single-unit assembly and stacking structure for biological baskets, which is convenient to customize according to the width and depth of the river channel on site. It is also quick to install and has low construction costs. The U-shaped structure formed by the side walls and bottom weir reduces the amount of water entering the project area from the outside river and lowers the pollution load, while not obstructing navigation and flood discharge. At the same time, the porous filter media such as volcanic rock or ceramsite filled in the biological baskets have both permeability and purification properties, which can help improve the water quality entering the project area, promote the recovery of submerged plants, and enhance the project benefits. It provides a replicable practical solution for balancing the basic water conservancy functions such as water ecological protection, river navigation, and flood discharge in the industry, and has important demonstration significance for promoting the development of water ecological environment restoration projects towards "eco-friendly and functionally compatible". Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall elevation structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the overall planar structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the side wall elevation structure of this utility model.

[0020] Figure 4This is a schematic diagram of the elevation structure of the bottom weir of this utility model.

[0021] Figure 5 This is a schematic diagram of the biological basket structure of this utility model.

[0022] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0023] 1. Side wall; 2. Bottom weir; 3. Filter media; 4. Biological basket; 5. I-beam fixing pile; 6. Perforated plate; 7. Geotextile; 8. Galvanized steel pipe fixing pile. Detailed Implementation

[0024] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0025] Example 1:

[0026] As attached Figure 1 To be continued Figure 5 As shown:

[0027] This utility model provides a U-shaped submerged filter dam for aquatic ecological restoration, including side walls 1, bottom weir 2, biological baskets 4, filter media 3, and area separation components; two sets of side walls 1 are provided, and the two sets of side walls 1 are respectively located on the left and right sides of the dam body; the bottom weir 2 is located at the bottom of the dam body; multiple biological baskets 4 are provided, and multiple biological baskets 4 are stacked vertically to form the side walls 1, and multiple biological baskets 4 are spliced ​​horizontally to form the bottom weir 2; multiple filter media 3 are provided, and multiple filter media 3 are respectively filled inside multiple biological baskets 4; multiple sets of area separation components are provided, and multiple sets of area separation components are respectively located inside multiple biological baskets 4.

[0028] Among them, the biological basket 4 is a single small frame with a specification of 1000*500*500mm, which is welded from 40*40mm 304 stainless steel square tubes. The biological basket 4 is welded by argon arc welding. The filter material 3 is composed of volcanic rock or ceramsite with a particle size of 3-5mm.

[0029] The area separation component includes: a perforated plate 6; the perforated plate 6 is a 304 steel plate with a hole diameter of 55mm and a thickness of 0.5mm. Multiple perforated plates 6 are provided, and the multiple perforated plates 6 are welded and fixed inside the biological basket 4. The perforated plates 6 horizontally arranged inside the biological basket 4 have a 200*300mm opening reserved inside.

[0030] The area separation component also includes: geotextile 7; multiple pieces of geotextile 7 are provided, and the multiple pieces of geotextile 7 are respectively fixedly connected to the inner side of multiple perforated plates 6.

[0031] The specific usage and function of this embodiment: Before construction, measure the width of the river mouth and the water depth 1m from the riverbank to determine the number of assembly groups of the biological baskets 4. The side walls 1 are stacked in 2-3 layers according to the water depth, and the bottom weir 2 is laid in 1-2 layers. During assembly, the prefabricated biological baskets 4 are transported to the site. Multiple biological baskets 4 are stacked in a pyramid shape to form the side walls 1, and multiple biological baskets 4 are stacked in a cuboid shape to form the bottom weir 2. Finally, the two side walls 1 and the bottom weir 2 present a U-shaped layout. In use, the U-shaped structure can narrow the river intersection at a single point, reducing the amount of water entering the project area by about 30%-50%, and reducing the pollution load. The submerged bottom weir 2 is below the normal water level and does not affect navigation and flood discharge.

[0032] Example 2:

[0033] Based on Example 1, as shown in the appendix Figure 1 To be continued Figure 5 As shown, it also includes a positioning component, which is located inside the side wall 1 and the bottom weir 2.

[0034] The positioning components include: I-beam fixing piles 5; the I-beam fixing piles 5 are made of 10# I-beams, and two I-beam fixing piles 5 are provided. The two I-beam fixing piles 5 are respectively fixedly connected to the inside of the biological basket 4 that makes up the two side walls 1, and the bottom of the two I-beam fixing piles 5 are embedded more than 1m into the riverbed.

[0035] The positioning components also include: galvanized steel pipe fixing piles 8; the galvanized steel pipe fixing piles 8 are made of hot-dip galvanized steel pipes with an outer diameter of 50cm, and multiple galvanized steel pipe fixing piles 8 are provided. The multiple galvanized steel pipe fixing piles 8 are respectively fixedly connected inside the multiple biological baskets 4 that make up the bottom weir 2, and the bottom of the multiple galvanized steel pipe fixing piles 8 is embedded more than 1m into the riverbed.

[0036] The specific usage and function of this embodiment are as follows: The side wall 1 is fixed by I-beam fixed piles 5, with its bottom embedded more than 1m into the riverbed; the bottom weir 2 is fixed by galvanized steel pipe fixed piles 8, with its bottom also embedded more than 1m into the riverbed. Finally, filter material 3 is filled into the biological basket 4 through the 200*300mm opening reserved in the perforated plate 6 and manually compacted with a long pole to complete the construction; the porous structure of the geotextile 7 and filter material 3 can adsorb suspended solids in the water, improve the transparency of the water entering the project area, promote the recovery of submerged plants such as Vallisneria natans and Myriophyllum spicatum, and increase the survival rate by more than 40% compared with the absence of isolation measures.

[0037] The following points should be noted in this article:

[0038] 1. The accompanying drawings of this embodiment only involve the structures involved in this embodiment; other structures can refer to the general design.

[0039] 2. Where there is no conflict, this embodiment and the features in the embodiment can be combined with each other to obtain new embodiments.

[0040] The above are merely specific implementations of this embodiment, but the protection scope of this embodiment is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this embodiment should be included within the protection scope of this embodiment. Therefore, the protection scope of this embodiment should be determined by the protection scope of the claims.

Claims

1. A U-shaped submerged filter dam for water ecological restoration, characterized in that: The dam includes side walls (1), bottom weir (2), biological baskets (4), filter media (3), area separation components, and positioning components. Two sets of side walls (1) are provided, and the two sets of side walls (1) are respectively located on the left and right sides of the dam body. The bottom weir (2) is located at the bottom of the dam body. Multiple biological baskets (4) are provided, and multiple biological baskets (4) are stacked vertically to form side walls (1), and multiple biological baskets (4) are spliced ​​horizontally to form bottom weirs (2). Multiple filter media (3) are provided, and multiple filter media (3) are respectively filled inside multiple biological baskets (4). Multiple sets of area separation components are provided, and multiple sets of area separation components are respectively located inside multiple biological baskets (4). The positioning components are located inside the side walls (1) and bottom weirs (2).

2. The U-shaped submerged filter dam for water ecological restoration according to claim 1, characterized in that: The biological basket (4) is a single small frame with a specification of 1000*500*500mm, which is welded from 40*40mm 304 stainless steel square tubes. The biological basket (4) is welded by argon arc welding. The filter material (3) is composed of volcanic rock or ceramsite with a particle size of 3-5mm.

3. The U-shaped submersible filter dam for aquatic ecological restoration as described in claim 2, characterized in that: The area separation component includes: a perforated plate (6); the perforated plate (6) is a 304 steel plate with a hole diameter of 55mm and a thickness of 0.5mm. Multiple perforated plates (6) are provided, and the multiple perforated plates (6) are welded and fixed inside the biological basket (4). The perforated plates (6) arranged horizontally inside the biological basket (4) have a 200*300mm opening reserved inside.

4. The U-shaped submerged filter dam for water ecological restoration according to claim 2, characterized in that: The area separation component also includes: geotextile (7); multiple pieces of geotextile (7) are provided, and the multiple pieces of geotextile (7) are respectively fixedly connected to the inner side of multiple perforated plates (6).

5. The U-shaped submerged filter dam for water ecological restoration according to claim 1, characterized in that: The positioning component includes: an I-beam fixing pile (5); the I-beam fixing pile (5) is made of 10# I-beam, and two I-beam fixing piles (5) are provided. The two I-beam fixing piles (5) are respectively fixedly connected to the inside of the biological basket (4) that makes up the two side walls (1), and the bottom of the two I-beam fixing piles (5) is embedded more than 1m into the riverbed.

6. The U-shaped submerged filter dam for water ecological restoration according to claim 1, characterized in that: The positioning component also includes: galvanized steel pipe fixing piles (8); the galvanized steel pipe fixing piles (8) are made of hot-dip galvanized steel pipes with an outer diameter of 50cm. Multiple galvanized steel pipe fixing piles (8) are provided. The multiple galvanized steel pipe fixing piles (8) are respectively fixedly connected to the inside of multiple biological baskets (4) that make up the bottom weir (2). The bottom of the multiple galvanized steel pipe fixing piles (8) is embedded more than 1m into the riverbed.

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