CN108547254B - River channel ecological revetment and construction method thereof - Google Patents
River channel ecological revetment and construction method thereof Download PDFInfo
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- CN108547254B CN108547254B CN201810336850.7A CN201810336850A CN108547254B CN 108547254 B CN108547254 B CN 108547254B CN 201810336850 A CN201810336850 A CN 201810336850A CN 108547254 B CN108547254 B CN 108547254B
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- 238000010276 construction Methods 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000002689 soil Substances 0.000 claims abstract description 50
- 238000001179 sorption measurement Methods 0.000 claims abstract description 47
- 239000004567 concrete Substances 0.000 claims abstract description 26
- 239000002023 wood Substances 0.000 claims abstract description 21
- 238000009991 scouring Methods 0.000 claims abstract description 6
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 4
- 241000196324 Embryophyta Species 0.000 claims description 26
- 239000002245 particle Substances 0.000 claims description 19
- 238000001914 filtration Methods 0.000 claims description 18
- 229910021536 Zeolite Inorganic materials 0.000 claims description 13
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 13
- 239000010881 fly ash Substances 0.000 claims description 13
- 239000010457 zeolite Substances 0.000 claims description 13
- 239000004575 stone Substances 0.000 claims description 8
- 235000019738 Limestone Nutrition 0.000 claims description 7
- 239000006028 limestone Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 230000003628 erosive effect Effects 0.000 claims description 6
- 230000008635 plant growth Effects 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000011380 pervious concrete Substances 0.000 claims description 4
- 235000005273 Canna coccinea Nutrition 0.000 claims description 3
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- 241001092500 Photinia x fraseri Species 0.000 claims description 3
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- 241001521648 Thalia dealbata Species 0.000 claims description 2
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- 238000002156 mixing Methods 0.000 claims description 2
- 235000013311 vegetables Nutrition 0.000 claims description 2
- 239000003344 environmental pollutant Substances 0.000 abstract description 4
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/122—Flexible prefabricated covering elements, e.g. mats, strips
- E02B3/123—Flexible prefabricated covering elements, e.g. mats, strips mainly consisting of stone, concrete or similar stony material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/30—Flood prevention; Flood or storm water management, e.g. using flood barriers
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Botany (AREA)
- Environmental Sciences (AREA)
- Revetment (AREA)
Abstract
A river channel ecological revetment and a construction method thereof comprise a permeation adsorption filter layer, wood pile guard feet, a gabion retaining wall, a bottom mud ecological bag layer and a vegetation layer, wherein the permeation adsorption filter layer is arranged at the joint of a river channel bank slope and a river bed and comprises two permeable concrete layers and an adsorption filter layer; the bottom ends of the sheet pile guard feet are embedded into the riverbed close to the outer edge of the step at the bottom layer of the permeation and adsorption filter layer; the gabion retaining wall comprises a Bingge net cage and a support; the bottom mud ecological bag layer is composed of a plurality of bottom ecological bags; the vegetation layer consists of a soil layer and a vegetation net; the construction method comprises the following steps: and sequentially laying a permeation adsorption filter layer, a gabion retaining wall and a vegetation layer on the step slope surface of the river bank slope surface, and embedding wood pile protection feet at slope feet. The invention has the beneficial effects that: the water body is ensured to be fully exchanged, N, P, heavy metal and other pollutants in the water body are effectively adsorbed, the strong anti-scouring capability of the water body is ensured, and the water body has good durability and applicability.
Description
Technical Field
The invention relates to a river channel ecological revetment and a construction method thereof.
Background
The ecological bank protection is a slope protection form for protecting the river slope surface by utilizing a structure formed by combining plants or plants and geotechnical materials, is an artificial bank protection with natural river bank properties, has the functions of preventing the river bank from collapsing, also has the functions of delaying flood and compensating withering, regulating water level, purifying the river channel and the like, and forms a coordinated river channel landscape with the surrounding environment. In summary, the ecological bank protection is an improvement of the traditional bank protection, is a product of the river engineering subject development to a relatively advanced stage, is a requirement of modern people for harmonious coordination with the nature, and is a necessary result of the technical development and progress of the bank protection.
On the other hand, the large amount of silt deposited at the bottom of the river seriously affects the functions of flood control, shipping and water regulation and storage. Furthermore, a large amount of pollutants are enriched in the silt at the bottom of the river, and if the silt is disturbed, part of the pollutants may be returned from the sediment into the river water, thereby causing a permanent influence on the water area. Meanwhile, the river bottom sludge contains a large amount of substances such as N, P elements and the like required by plant growth, and the sludge serving as a raw material for cultivating the plant growth has higher economical efficiency and feasibility.
The patent with publication number 103061310B is a new type of ecological habitat revetment, which is built layer by layer with stones to form an ecological habitat area, and water pipes communicating the inside and outside are used as the access way for aquatic animals, but the revetment still uses a large amount of geotechnical materials such as reinforced concrete and building blocks, and has certain damage to the original natural ecosystem of the river.
The patent with publication number 203890955U is an ecological bank protection vegetation structure, adopts the alloy steel wire cage body to pile up layer by layer at the junction of river course bank slope and riverbed and forms the step form, and the plant pad is placed to the internal portion of alloy steel wire cage, and the plant pad includes the plant rhizome or the seedling of matrix and different grade type, but this structure receives water impact to influence greatly, and the internal portion of cage soil body matrix and plant seedling receive the water impact easily destroyed, and soil particles can run off along with the water flow, and water purification efficiency is lower.
Disclosure of Invention
The invention provides a river channel ecological revetment and a construction method thereof, aiming at solving the problems of weak scouring resistance or low water purification efficiency of the traditional revetment technology and the current partial ecological revetment technology.
The invention relates to a river channel ecological revetment, which is characterized in that: the ecological river mud bag comprises a permeation adsorption filter layer, wood pile guard feet, a gabion retaining wall, a bottom mud ecological bag layer and a vegetable layer, wherein the permeation adsorption filter layer is arranged at the joint of a river bank slope and a river bed, the permeation adsorption filter layer forms a first step bank slope which can be attached to a step surface of the river bank slope from bottom to top along the slope surface of the bank guard, the permeation adsorption filter layer comprises an inner layer of permeable concrete and an outer layer of permeable concrete and an adsorption filter layer clamped between the two permeable concrete layers, and the adsorption filter layer is filled in a gap reserved between the two permeable concrete layers; the wood pile protection legs are closely arranged along the edge of the bottom end of the permeation and adsorption filter layer, and the bottom end of each wood pile protection leg is embedded into a riverbed at the outer edge of the step at the bottom layer of the permeation and adsorption filter layer; the gabion retaining wall comprises gabion net boxes and supports filled in the gabion net boxes, wherein the gabion net boxes are stacked and connected from bottom to top along the slope of the first stepped bank, one side surface of the gabion retaining wall is matched with the slope surface of the slope of the first stepped bank, and the other side surface of the gabion retaining wall forms a second stepped bank slope for stacking bottom mud ecological bags; the bottom mud ecological bag layer is composed of a plurality of bottom ecological bags, the bottom ecological bags are stacked on the step surface of the slope of the second stepped embankment, and the highest point of the bottom mud ecological bag layer does not exceed the highest point of the wood pile toe guard; the vegetation layer comprises soil horizon and vegetation net, the soil horizon covers at the top layer of gabion retaining wall, clearance and top layer between the ecological bag of sediment, and one side of soil horizon to the riverbed is the slope, soil horizon surface planting vegetation forms the vegetation net, the vegetation net divide into aquatic plant, ground cover plant and bush from bottom to top according to the environment of planting soil horizon in proper order. Wood pile foot protection wood pile foot protection
The concrete layer that permeates water is formed by being interrupted the coarse aggregate of grade, ordinary portland cement and water mixture, and thickness 20 ~ 30mm, and is two-layer altogether, presss from both sides the filter layer in, and one side is pasted tightly with the bank domatic, and the another side is pasted tightly with the interior border of gabion barricade, provides infiltration passageway for the inside and outside water of revetment to soil and filter layer play the stabilization and solidification effect in the opposite bank, prevent that the granule from along with water flow loss.
The adsorption and filtration layer is laid between two permeable concrete layers, is 50-60 mm thick and is of a layered structure formed by laying fine gravel, zeolite, macadam and fly ash, and the volume ratio of the fine gravel, the zeolite, the macadam and the fly ash in the adsorption and filtration layer is 4:2:2: 2. The particle size of the gravel is 2-4 cm, the particle size of the zeolite is 0.5-1 cm, the particle size of the limestone is 0.5-1 cm, and the particle size of the fly ash is 0.5-300 mu m, so that N, P and other elements in the water body can be effectively adsorbed.
The timber pile banket adopts timber pile embedding riverbed and closely arranges, and timber pile stake footpath is 160mm, and the pile length is 3m, and the top of timber pile surpasss the soil horizon timber pile banket on bottommost gabion barricade surface.
The gabion retaining wall is of a cuboid structure and is formed by stacking and connecting cuboid check net boxes filled with supports step by step along a slope surface; the check net cage is made of woven net sheets with twisted and hexagonal meshes, one third of the width of the upper layer of net cage is stacked on the lower layer of net cage and stacked step by step to form a step shape, and adjacent net cages are bound and connected through steel wires; the support is a mixture of large-particle-size stone blocks, broken stones, gravels and soil.
The bottom mud ecological bag layer is formed by piling up ecological bags filled with bottom mud and organic fertilizers required by plant growth, and the bottom mud is river bottom silt obtained after dredging and subjected to harmless treatment.
The aquatic plant includes power flower, candle and/or saxifrage again, the ground is by the plant including big flower canna, the bush includes glochidia cauliflora, photinia fraseri and/or fructus gardeniae, and the vegetation kind is abundant, for waters and all ring edge borders provide the condition of hiding the shade, provides abundant habitat and food source for the animal and plant, and plant roots's development plays the firm effect of muscle again to the revetment system.
The invention relates to a construction method of a river channel ecological revetment, which comprises the following steps:
1) making the bank slope at the junction of the river bed and the bank slope surface into a step type to form a step type slope surface;
2) paving a first permeable concrete layer on the step slope surface of the river bank slope surface to level;
3) laying an adsorption filtration layer on the basis of the first layer of pervious concrete for adsorbing N, P or heavy metal elements in the water body, wherein the adsorption filtration layer consists of fine gravel, zeolite, crushed limestone and fly ash;
4) a second permeable concrete layer is laid on the basis of the adsorption and filtration layer, so that the leveling effect is achieved, only the permeation of water is allowed, and the loss of soil body particles in the bank and small-particle-size particles in the filtration layer along with water flow is prevented;
5) after the cushion layer is laid, hoisting cuboid check-guest net cages filled with large-particle-size stones, gravels and soil one by one to the cushion layer, stacking the check-guest net cages step by step along a slope surface to finally form a gabion retaining wall, weakening the impact action of water flow and slowing down the flow rate of the water flow, wherein the check-guest net cages are made of woven mesh sheets with twisted and hexagonal meshes, one third of the width of the upper net cage is stacked on the lower net cage and stacked step by step to form a step shape, and adjacent net cages are bound and connected through steel wires;
6) stacking bottom mud ecological bags on the step surface of the gabion retaining wall, filling soil into large gaps among the bottom mud ecological bags to form a soil layer, wherein the slope surface of the soil layer is flat, and an included angle between the slope surface of the soil layer and the plane of a river bed is an acute angle;
7) a vegetation net is paved on the surface of the soil layer, and aquatic plants, ground cover plants and shrubs are planted on the vegetation net according to the water level condition;
8) the water flow scouring erosion situation of the toe is usually serious, wood pile protection feet are adopted at the toe, the wood pile protection feet are embedded into a riverbed and are closely arranged along the outer edge of the bottom of the permeation adsorption filter layer, and the top of each wood pile is higher than a soil layer so as to reduce the erosion of the toe caused by the water flow to erode the wood pile protection feet.
The invention has the beneficial effects that: the revetment utilizes silt soil dredged from river bottom as a nutrient source for plant growth, and embodies the concepts of environmental protection and ecological cycle. The revetment adopts a combined structure system, provides a larger inhabitation and reproduction space for aquatic organisms, fully exerts the characteristics that the ecological bag is deformed and consumes energy due to water flow impact and the gabion retaining wall is stable in structure, strengthens the anti-scouring capability of the revetment, and is suitable for a river channel with higher water flow velocity. The combined structure system has large gaps and good water permeability, and ensures the flow and exchange of water bodies inside and outside the revetment. The ecological revetment adopts vegetation and geotechnical filter layer for double filtration, and the filtration effect is superior to that of the ecological revetment in a common form.
Drawings
Figure 1 is a schematic cross-sectional view of the revetment structure (a represents the maximum water level and B represents the normal water level).
Figure 2 is a schematic top view of the present revetment structure.
FIG. 3 is a schematic view of the overall structure of the check box.
Detailed Description
The invention will be further explained with reference to the drawings
With reference to the accompanying drawings:
The pervious concrete layer 11 is formed by mixing coarse aggregate of discontinuous grain size, ordinary portland cement and water, and thickness is 20 ~ 30mm, and is two-layer altogether, presss from both sides the filter layer in, and one side pastes tightly with the bank domatic formation echelonment, and the another side pastes tightly with the interior boundary of gabion barricade.
The adsorption and filtration layer 12 is laid between two permeable concrete layers, is 50-60 mm thick and is of a layered structure formed by laying fine gravel, zeolite, macadam and fly ash, and the volume ratio of the fine gravel, the zeolite, the macadam and the fly ash in the adsorption and filtration layer is 4:2:2: 2. The particle size of the gravel is 2-4 cm, the particle size of the zeolite is 0.5-1 cm, the particle size of the limestone is 0.5-1 cm, and the particle size of the fly ash is 0.5-300 mu m.
The timber pile banket adopts timber pile embedding riverbed and closely arranges, and timber pile stake footpath is 160mm, and stake length 3m, and the top of timber pile surpasss the soil horizon on bottom gabion retaining wall surface.
The gabion retaining wall 3 is of a cuboid structure and is formed by stacking and connecting cuboid check gabion net cages filled with large-particle-size stones, gravels and soil step by step along a slope surface; the size of the check net box is 1.2m multiplied by 0.5m multiplied by 3m and 0.5m multiplied by 3m, the check net box is made of braided net sheets with twisted and hexagonal meshes, one third width of the upper layer net box is stacked on the lower layer net box and stacked step by step to form a step shape, and the adjacent net boxes are connected through steel wire binding.
The bottom mud ecological bag layer 4 is formed by piling up ecological bags filled with bottom mud and organic fertilizers required by plant growth, wherein the bottom mud is river bottom silt which is obtained after dredging and is subjected to harmless treatment.
The aquatic plant comprises Thalia dealbata, candelilla and/or saxifrage, the ground cover plant comprises canna grandiflora, and the shrub comprises Forsythia viridissima, Photinia fraseri and/or Gardenia jasminoides.
1) making a bank slope at the junction of the river bed and the slope surface of the river bank into a step type, and forming the step type slope surface, wherein the step width is 900-1300 mm, and the step height is 500-600 mm;
2) paving a first permeable concrete layer with the thickness of 20-30 mm on the step slope surface of the river bank slope surface to play a leveling role;
3) laying an adsorption filter layer with the thickness of 50-60 mm on the basis of the first layer of pervious concrete, wherein the adsorption filter layer is used for adsorbing N or P elements in the water body, and consists of fine gravel, zeolite, macadam limestone and fly ash, and the volume ratio of the fine gravel, the zeolite, the macadam limestone and the fly ash in the filter layer is 4:2:2: 2;
4) a second permeable concrete layer with the thickness of 20-30 mm is laid on the basis of the adsorption and filtration layer, so that the effect of leveling is achieved, only the permeation of water is allowed, and the loss of soil body particles in the bank and small-particle-size particles in the filtration layer along with water flow is prevented;
5) after the cushion layer is laid, hoisting cuboid check-guest net cages filled with large-particle-size stones, gravels and soil one by one to the cushion layer, stacking the check-guest net cages step by step along a slope surface to finally form a gabion retaining wall, weakening the impact action of water flow and slowing down the flow rate of the water flow, wherein the check-guest net cages are made of woven mesh sheets with twisted and hexagonal meshes, one third of the width of the upper net cage is stacked on the lower net cage and stacked step by step to form a step shape, and adjacent net cages are bound and connected through steel wires;
6) stacking bottom mud ecological bags on the step surface of the gabion retaining wall, filling soil into a large gap between the bottom mud ecological bags to form a soil layer, wherein the slope surface of the soil layer is flat, and the slope surface forms a slope with an included angle of 30 degrees with the plane of a river bed;
7) a vegetation net is paved on the surface of the soil layer, aquatic plants, ground cover plants and shrubs are planted on the vegetation net according to the water level condition, and the capability of the vegetation layer for adsorbing N, P elements and heavy metal pollutants and the photosynthesis oxygen supply capability are improved;
8) the water flow scouring erosion situation at the toe of the slope is usually serious, sheet pile protection feet are adopted at the toe of the slope, the wood pile protection feet are embedded into a riverbed and are closely arranged along the outer edge of the bottom of a permeation adsorption filter layer, the top of each sheet pile is higher than a soil layer by about 0.2-0.3 m, the effective width of the cross section of each sheet pile is 600mm, the effective height is 180mm, the thickness is 13.4mm, each sheet pile is embedded into the riverbed by 1.8m, and the top of each wood pile is higher than the soil layer, so that the erosion of the toe of the slope caused by water flow is reduced.
The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but includes equivalent technical means as would be recognized by those skilled in the art based on the inventive concept.
Claims (6)
1. The utility model provides a river course ecological bank protection which characterized in that: the ecological river mud bag comprises a permeation adsorption filter layer, wood pile guard feet, a gabion retaining wall, a bottom mud ecological bag layer and a vegetable layer, wherein the permeation adsorption filter layer is arranged at the joint of a river bank slope and a river bed, the permeation adsorption filter layer forms a first step bank slope which can be attached to a step surface of the river bank slope from bottom to top along the slope surface of the bank guard, the permeation adsorption filter layer comprises an inner layer of permeable concrete and an outer layer of permeable concrete and an adsorption filter layer clamped between the two permeable concrete layers, and the adsorption filter layer is filled in a gap reserved between the two permeable concrete layers; the permeable concrete layer is formed by mixing coarse aggregate of discontinuous grain grades, ordinary portland cement and water, has a thickness of 20-30 mm, is divided into two layers, and is internally provided with a filter layer, one surface of the permeable concrete layer is tightly attached to the slope surface of a river bank, and the other surface of the permeable concrete layer is tightly attached to the inner boundary of the gabion retaining wall; the adsorption and filtration layer is laid between two permeable concrete layers, is 50-60 mm thick and is of a layered structure formed by laying fine gravel, zeolite, macadam and fly ash, and the volume ratio of the fine gravel, the zeolite, the macadam and the fly ash in the adsorption and filtration layer is 4:2:2: 2; the particle size of the gravel is 2-4 cm, the particle size of the zeolite is 0.5-1 cm, the particle size of the limestone is 0.5-1 cm, and the particle size of the fly ash is 0.5-300 mu m;
the wood pile protection legs are closely arranged along the edge of the bottom end of the permeation and adsorption filter layer, and the bottom end of each wood pile protection leg is embedded into a riverbed at the outer edge of the step at the bottom layer of the permeation and adsorption filter layer; the gabion retaining wall comprises gabion net boxes and supports filled in the gabion net boxes, wherein the gabion net boxes are stacked and connected from bottom to top along the slope of the first stepped bank, one side surface of the gabion retaining wall is matched with the slope surface of the slope of the first stepped bank, and the other side surface of the gabion retaining wall forms a second stepped bank slope for stacking bottom mud ecological bags; the bottom mud ecological bag layer is composed of a plurality of bottom ecological bags, the bottom ecological bags are stacked on the step surface of the slope of the second stepped embankment, and the highest point of the bottom mud ecological bag layer does not exceed the highest point of the sheet pile toe guard; the vegetation layer comprises soil horizon and vegetation net, the soil horizon covers at the top layer of gabion retaining wall, clearance and top layer between the ecological bag of sediment, and one side of soil horizon to the riverbed is the slope, soil horizon surface planting vegetation forms the vegetation net, the vegetation net divide into aquatic plant, ground cover plant and bush from bottom to top according to the environment of planting soil horizon in proper order.
2. The ecological revetment for river channels of claim 1, wherein: the timber pile banket adopts timber pile embedding riverbed and closely arranges, and timber pile stake footpath is 160mm, and stake length 3m, and the top of timber pile surpasss the soil horizon on bottom gabion retaining wall surface.
3. The ecological revetment for river channels of claim 1, wherein: the gabion retaining wall is of a cuboid structure and is formed by stacking and connecting cuboid check gabion net boxes filled with large-particle-size stones, gravels and soil step by step along a slope surface; the check net cage is made of woven net sheets with twisted pairs and hexagonal meshes, one third of the width of the upper layer of net cage is stacked on the lower layer of net cage and stacked step by step to form a step shape, and adjacent net cages are bound and connected through steel wires.
4. The ecological revetment for river channels of claim 1, wherein: the bottom mud ecological bag layer is formed by piling up ecological bags filled with bottom mud and organic fertilizers required by plant growth, and the bottom mud is river bottom silt obtained after dredging and subjected to harmless treatment.
5. The ecological revetment for river channels of claim 1, wherein: the aquatic plant comprises Thalia dealbata, candelilla and/or saxifrage, the ground cover plant comprises canna grandiflora, and the shrub comprises Forsythia viridissima, Photinia fraseri and/or Gardenia jasminoides.
6. The construction method of the river channel ecological bank protection as claimed in any one of claims 1 to 5, comprising the following steps:
1) making the bank slope at the junction of the river bed and the bank slope surface into a step type to form a step type slope surface;
2) paving a first permeable concrete layer on the step slope surface of the river bank slope surface to level;
3) laying an adsorption filtration layer on the basis of the first layer of pervious concrete for adsorbing N, P or heavy metal elements in the water body, wherein the adsorption filtration layer consists of fine gravel, zeolite, crushed limestone and fly ash;
4) a second permeable concrete layer is laid on the basis of the adsorption and filtration layer, so that the leveling effect is achieved, only the permeation of water is allowed, and the loss of soil body particles in the bank and small-particle-size particles in the filtration layer along with water flow is prevented;
5) after the cushion layer is laid, hoisting cuboid check-guest net cages filled with large-particle-size stones, gravels and soil one by one to the cushion layer, stacking the check-guest net cages step by step along a slope surface to finally form a gabion retaining wall, weakening the impact action of water flow and slowing down the flow rate of the water flow, wherein the check-guest net cages are made of woven mesh sheets with twisted and hexagonal meshes, one third of the width of the upper net cage is stacked on the lower net cage and stacked step by step to form a step shape, and adjacent net cages are bound and connected through steel wires;
6) stacking bottom mud ecological bags on the step surface of the gabion retaining wall, filling soil into large gaps among the bottom mud ecological bags to form a soil layer, wherein the slope surface of the soil layer is flat, and an included angle between the slope surface of the soil layer and the plane of a river bed is an acute angle;
7) a vegetation net is paved on the surface of the soil layer, and aquatic plants, ground cover plants and shrubs are planted on the vegetation net according to the water level condition;
8) the water flow scouring erosion condition at the toe of the slope is usually serious, sheet pile guard feet are adopted at the toe of the slope, the wooden pile guard feet are embedded into a riverbed and are closely arranged along the outer edge of the bottom of the permeation adsorption filter layer, and the top of the wooden pile is higher than a soil layer so as to reduce the erosion of the water flow to the toe of the slope.
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| CN109811723B (en) * | 2019-03-07 | 2024-05-14 | 杭州中联筑境建筑设计有限公司 | Stepped ecological landscape slope protection |
| CN110984073B (en) * | 2019-12-21 | 2021-07-27 | 华北水利水电大学 | Plant organic combination composite ecological slope protection and construction method |
| CN115030607B (en) * | 2022-05-25 | 2023-03-24 | 浙江泓智新材料有限公司 | River channel ecological protection fence and installation method thereof |
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| JP2002294655A (en) * | 2001-04-03 | 2002-10-09 | Toa Harbor Works Co Ltd | Sea bank for ecotone protection |
| CN203021358U (en) * | 2012-02-20 | 2013-06-26 | 广州市新之地环保产业有限公司 | Inland river bank vegetation buffer purification zone |
| KR101568828B1 (en) * | 2013-08-27 | 2015-11-16 | 한국건설기술연구원 | River Bank Protection Structure using Polyurethane Coating Porous Aggregate and Mat, and Method for Constructing thereof |
| CN203977363U (en) * | 2014-06-26 | 2014-12-03 | 江苏建筑职业技术学院 | A kind of ecological slope protection |
| CN205954567U (en) * | 2016-08-24 | 2017-02-15 | 浙江省风景园林设计院有限公司 | Landscape zhong he lake revetment structure |
| CN106337394A (en) * | 2016-09-22 | 2017-01-18 | 水利部中国科学院水工程生态研究所 | River bank ecological restoration device and method suitable for mountain river characteristics |
| CN106522160A (en) * | 2016-10-24 | 2017-03-22 | 廊坊师范学院 | Construction method of revetment type ecological landscape |
| CN207211061U (en) * | 2017-06-05 | 2018-04-10 | 唐山职业技术学院 | A kind of ecological revetment for purifying area source pollutants |
| CN208563250U (en) * | 2018-04-16 | 2019-03-01 | 浙江工业大学 | A kind of river channel ecology shore protection |
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