CN210885521U - Modular ecological island for ecological restoration - Google Patents

Abstract

The utility model discloses an ecological island of modularization for ecological remediation, include: the island body is used for forming a stable and reliable natural ecological purification system, is constructed on the riverbed of a riverway, and the upper end of the island body extends to the water level above the normal water level of the riverway. The periphery of the island body is provided with a surrounding pile frame for stabilizing the island body, the lower end of the surrounding pile frame is embedded into a riverbed and fixed, the upper end of the surrounding pile frame extends to a position above the normal water level of a riverway, the peripheral wall of the surrounding pile frame is provided with an inflow and outflow seam, the inflow and outflow seam is used for allowing water in the riverway to enter the island body for purification, and meanwhile, the water quantity entering and discharging the island body and the water distribution condition are controlled. The utility model discloses an ecological island, the island body is laid all around and is enclosed pile frame, so need not pass through chain or rope anchor at the river course bank, ecological island structure relatively stable, independent to ensure the patency in river course, and through setting up the business turn over seam, as the passageway of island body influent and effluent and control the flow and the rivers distribution situation of the island body influent and effluent.

Description

Modular ecological island for ecological restoration

Technical Field

The utility model relates to a basin administers the field, especially, relates to an ecological island of modularization for ecological remediation.

Background

With the rapid development of urbanization in China and the change of unnatural features of a river channel (such as dam building and gate building of the river channel) caused by traditional hydraulic engineering, the continuity and the wriggling of the river channel are damaged, the problem of water environment of a drainage basin is highlighted day by day, the receiving water bodies of the river channel, the lake and the like are polluted by various point sources, surface sources and internal sources, the self-cleaning capability of the receiving water bodies is reduced, the water quality is blacked and smelled, an aquatic ecosystem is degraded, and the function of natural ecological attributes of the river channel is further lost.

At present, the measures for ecological restoration of the riverway are mainly to construct a conventional ecological green island or an ecological floating island, and the two island structures have certain effects on changing the flow rate of the riverway and improving the water environment, but the two island structures have some defects in the aspects of function exertion and practical application. The ecological green island is a fixed island, the island body is composed of soil and plants, the plants are planted on the island, the bottom of the island is directly combined with a river bed, river water basically cannot flow into the island, only little river water permeates through the soil of the island body, and the growth of the plants on the island is maintained, so that the capability and the effect of purifying the water quality of the river are very limited.

Ecological chinampa is made through the manual work, for setting up filler, plant, aeration equipment in the floating bed structure of an organic whole at waters such as river course, lake, the chinampa passes through chain or rope and at the anchoring of river course both sides, whole chinampa floats from top to bottom according to river seasonal water level change, the river flows through when floating island below through the chinampa on the microbial absorption, degradation and plant absorption effect reach the purpose of purifying river water, but this kind of mode exists several not enough: (1) the bottom space of the floating island is large, water flow is easy to diffuse, the retention time of the water flow is short, microorganisms on the filler are difficult to ingest and are easy to lose due to water flow scouring, and the water quality treatment effect is poor; (2) aeration is needed at the bottom of the floating island, so that matched air source equipment and pipeline systems are needed, the electric energy is consumed, the oxygen utilization rate is low, and the daily maintenance and management are very inconvenient; (3) chains or ropes are required to be anchored at the bank side around the whole floating island, which is equal to artificial arrangement of obstacles and influences the smoothness of the river channel.

SUMMERY OF THE UTILITY MODEL

The utility model provides a ecological island of modularization for ecological remediation to solve that present green island of ecology and ecological chinampa exist to river course quality of water purification ability and effect limited, need consume electric energy, oxygen utilization ratio low, be not convenient for daily maintenance and management and influence the technical problem of the patency of river course.

The utility model adopts the technical scheme as follows:

the utility model provides an ecological island of modularization for ecological remediation sets up in the river course that treats ecological remediation in order to be used for constructing stable, reliable natural ecological clean system to purify rivers in the river course, resume the function of river course, and keep the continuity and the wriggling nature of river course, ecological island includes: the island body is used for forming a stable and reliable natural ecological purification system, is constructed on the riverbed of a riverway, and the upper end of the island body extends to be higher than the normal water level of the riverway; the periphery of the island body is provided with a surrounding pile frame for stabilizing the island body, the lower end of the surrounding pile frame is embedded into a riverbed and fixed, the upper end of the surrounding pile frame extends to a position above the normal water level of a riverway, the peripheral wall of the surrounding pile frame is provided with an inflow and outflow seam, the inflow and outflow seam is used for allowing water in the riverway to enter the island body for purification, and meanwhile, the water quantity entering and discharging the island body and the water distribution condition are controlled.

Furthermore, the ecological island is arranged in the center of the river channel or at the position close to the river bank of the river channel or connected with the river bank; the transverse section of the ecological island is oval, and the long axis of the ecological island faces the extending direction of the river channel; the area of the vertical section of the ecological island is smaller than 1/3 of the vertical section of the river channel where the ecological island is arranged.

Furthermore, the enclosing pile frame comprises a plurality of pile rods which are sequentially arranged at intervals along the circumferential direction of the island body, the lower end of each pile rod is embedded into a supporting layer below the riverbed, and the upper end of each pile rod extends to a position 500-600 mm above the normal water level of the riverway; the clearance between two adjacent pile rods is 3-10 mm.

Furthermore, the gap between two adjacent pile rods of the surrounding pile frame, which are vertically arranged with the water flow direction of the river channel, is 3-4 mm; the clearance between two adjacent pile rods of the pile enclosing frame, which are arranged in parallel with the water flow direction of the river channel, is 8-10 mm.

Further, the pile rod is a wood pile prepared from wood, or a stone pile prepared from stone, or a concrete pile formed by pouring reinforced concrete; the section of the pile rod is circular or polygonal, and the outer diameter of the pile rod is 100-200 mm.

Furthermore, the pile enclosing frame further comprises a plurality of connecting rods or connecting ropes, and the connecting rods or the connecting ropes are used for connecting the pile rods into a whole.

Furthermore, the island body comprises a gravel layer or a crushed stone layer laid on the river bed and a biological medium soil layer laid on the gravel layer or the crushed stone layer; the gravel layer or the crushed stone layer extends to above the normal water level of the river channel; various aquatic plants of different types are planted on the biological medium soil layer.

Furthermore, the gravel layer comprises a coarse gravel layer, a middle gravel layer and a fine gravel layer which are sequentially paved from bottom to top; the coarse gravel layer is laid on the river bed; the biological medium soil layer is laid on the fine gravel layer.

Further, the particle size range of the coarse gravels in the coarse gravel layer is 30 mm-50 mm; the particle size range of the medium gravel in the medium gravel layer is 10-15 mm; the fine gravel layer has a fine gravel particle size range of 3mm to 8 mm.

Furthermore, the height of the coarse gravel layer is 300-400 mm, the height of the middle gravel layer is 100-200 mm, the height of the fine gravel layer is 100-200 mm, and the sum of the heights of the coarse gravel layer, the middle gravel layer and the fine gravel layer is 50-100 mm higher than the normal water level of the river channel; the thickness of the biological medium soil layer is 500 mm-600 mm.

The utility model discloses following beneficial effect has:

the utility model discloses an ecological island of modularization for ecological remediation is including the island body that is used for forming stable, reliable natural ecological clean system and enclose and locate the island external application in stabilizing the island body enclose the pile frame, and make after the lower extreme embedding riverbed through enclosing the pile frame in, enclose the pile frame fixed, so the utility model discloses an ecological island easily realizes the modularization, and can adopt a plurality of ecological islands of different sizes, forms to assemble and make up in a flexible way according to river course quality of water, depth of water, velocity of flow and processing requirement, and still can resume various functions of river course through moulding and arranging to the rationalization of ecological island, and keep the continuity and the wriggling nature of river course, the continuity performance of river course guarantees that aquatic organisms such as fish normally flourish and derives, and river course mainstream, tributary, gulf, cardiac beach, pool such as deep pool are moulded to the wriggling performance of river course, and then for fish, birds, amphibian space, and amphibian, Insects and the like provide places for breeding and inhabiting, rich landscape effects are generated, meanwhile, the meandering form of the riverway can reduce and consume the impact of flood, the stability of the form of a riverbed is ensured, and the pressure of a downstream river section is weakened; in the ecological island, the surrounding pile frames are arranged around the island body, so that anchoring by chains or ropes at the bank of the river channel is not needed, the ecological island is relatively stable and independent in structure, the smoothness of the river channel is guaranteed, and meanwhile, aquatic plants can be planted outside the surrounding pile frames, so that the plant absorption function and the landscape effect are further enhanced; the utility model discloses an ecological island adopts the fender pile frame fixed and set up the business turn over seam on fender pile frame's perisporium, as the passageway of island body influent and effluent and control island body influent and effluent flow and rivers distribution situation, can also effectively intercept great floater simultaneously and prevent that it from getting into in the island, in addition, can also create a relatively stable safe microenvironment on river course or river bank limit, has stronger water impact load capacity when dealing with river water level change.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

fig. 1 is a schematic plan view of a modular ecological island for ecological restoration according to a preferred embodiment of the present invention, which is installed in a river;

fig. 2 is a schematic cross-sectional view of the ecological island of fig. 1.

Description of the figures

10. A river channel; 101. a riverbed; 102. a normal water level; 103. river banks; 20. an island body; 21. a coarse gravel layer; 22. a middle gravel layer; 23. a fine gravel layer; 24. a biological medium soil layer; 25. an aquatic plant; 30. enclosing a pile frame; 31. a pile rod.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered below.

Referring to fig. 1 and 2, a preferred embodiment of the present invention provides a modular ecological island for ecological restoration, which is disposed in a river 10 to be ecological-restored for constructing a stable and reliable natural ecological purification system, so as to purify water flow in the river 10, recover the function of the river 10, and maintain the continuity and the serpentine of the river 10, and the ecological island includes: an island body 20 for forming a stable and reliable natural ecological purification system, the island body 20 being constructed on a riverbed 101 of a river channel 10, and an upper end of the island body 20 extending above a normal water level 102 of the river channel 10. The periphery of the island body 20 is provided with a surrounding pile frame 30 for stabilizing the island body 20, the lower end of the surrounding pile frame 30 is embedded into a riverbed 101 for fixation, the upper end of the surrounding pile frame 30 extends to a position above a normal water level 102 of the riverway 10, the peripheral wall of the surrounding pile frame 30 is provided with an inflow and outflow seam, the inflow and outflow seam is used for allowing water in the riverway 10 to enter the island body 20 for purification, and meanwhile, the water quantity entering and discharging the island body 20 and the water distribution condition are controlled.

The utility model discloses an ecological island of modularization for ecological remediation is including the island body 20 that is used for forming stable, reliable natural ecological clean system and enclose and locate island body 20 and be used for stabilizing the enclosure pile frame 30 of island body 20 outward, and make enclosure pile frame 30 fixed in riverbed 101 through the lower extreme embedding riverbed of enclosure pile frame 30 back, so the utility model discloses an ecological island easily realizes the modularization, and can adopt a plurality of ecological islands of different sizes, forms to assemble and make up in a flexible way according to river course quality of water, depth of water, velocity of flow and processing requirement, and still can resume the various functions of river course 10 through rationalization moulding and arranging to ecological island, and keep the continuity and the wriggling nature of river course 10, the continuity of river course can guarantee that aquatic organisms such as fish normally multiply and thrive, the wriggling performance of river course moulds riverway mainstream, tributary, river course, gulf, heart beach, deep pool etc. water space, and then for fish, Birds, amphibians, insects and the like provide places for breeding and inhabiting, rich landscape effects are generated, meanwhile, the meandering form of the river channel can reduce and consume the impact of flood, the stability of the form of the river bed is ensured, and the pressure of the downstream river section is weakened; in the ecological island of the utility model, the surrounding pile frames 30 are arranged around the island body 20, so that the ecological island is relatively stable and independent in structure and ensures the smoothness of the river course without being anchored by chains or ropes at the bank of the river course, and meanwhile, aquatic plants can be planted outside the surrounding pile frames 30, so that the plant absorption function and the landscape effect are further enhanced; the utility model discloses an ecological island adopts and encloses that pile frame 30 is fixed and set up the business turn over seam on enclosing pile frame 30's perisporium, as the passageway of island body 20 intaking and play water and control island body 20 and advance, go out the flow and the rivers distribution situation of water, can also effectively intercept great floater simultaneously and prevent that it from getting into in the island body 20, in addition, can also create a relatively stable safe microenvironment on river course or river bank limit, have stronger water impact load capacity when dealing with the river water level change.

Alternatively, as shown in fig. 1, the ecological island is disposed at the center of the river channel 10 or near the river bank 103 of the river channel 10 or connected to the river bank 103, the ecological island should be disposed at a place where the river channel is gentle and has a certain water depth for a long time, and the specific disposition position of the ecological island should be specifically set according to the specific condition of the river channel. In other embodiments, the ecological island may also be disposed in a grass ditch, a stream channel or a manually excavated trench for water quality treatment. The transverse section of the ecological island is oval, and the long axis of the ecological island faces the extending direction of the river channel 10, so that the blocking effect on water flow is reduced. The area of the vertical section of the ecological island is smaller than 1/3 of the vertical section of the river channel 10 at the setting position of the ecological island, and the effect of blocking water flow is reduced.

Optionally, as shown in fig. 2, the pile surrounding frame 30 includes a plurality of pile rods 31 sequentially arranged at intervals along the circumferential direction of the island body 20, the lower end of each pile rod 31 is embedded into the supporting layer below the river bed 101 to fix the pile rod 31, so as to prevent the pile rod 31 from loosening, and the upper end of each pile rod 31 extends to a position 500mm to 600mm above the normal water level 102 of the river 10. The gap between two adjacent pile rods 31 is 3-10 mm, and the setting of the gap between two adjacent pile rods 31 can control the flow rate of water inlet and outlet of the island body and the distribution condition of water flow in the island body 20.

Optionally, as shown in fig. 1, the gap between two adjacent pile rods 31 of the pile enclosing frame 30, which are arranged perpendicular to the water flow direction of the river channel 10, is 3mm to 4 mm. Because the water flow is fast and the water power is large in the direction perpendicular to the surrounding pile frame 30, the gap between two adjacent pile rods 31 needs to be correspondingly reduced, and the phenomenon that the gap is too large, the water quantity entering the island body 20 is too much, the water flow is too fast, the structure of the island body is unstable, and the water flow purification effect is poor is prevented. The gap between two adjacent pile rods 31 of the pile enclosing frame 30, which are arranged in parallel with the water flow direction of the river channel 10, is 8-10 mm. Since the water flow is slow in the direction parallel to the pile enclosing frame 30 and the hydraulic power is small, the gap between two adjacent pile rods 31 needs to be correspondingly increased to smoothly discharge the water flow in the island body 20, so that the water output and the water input form a dynamic balance.

Alternatively, as shown in fig. 2, the pile rod 31 is a wooden pile made of wood, or a stone pile made of stone, or a concrete pile formed by pouring reinforced concrete. The cross section of the pile rod 31 is circular or polygonal, and the outer diameter of the pile rod 31 is 100 mm-200 mm.

Preferably, the pile enclosing frame 30 further comprises a plurality of connecting rods or connecting ropes for connecting the plurality of pile rods 31 into a whole, so as to enhance the stability of the whole pile enclosing frame 30. The connecting rod can be a rod formed by processing trees or a rod formed by processing phyllostachys pubescens. The connecting rope can be a nylon rope, a steel wire rope and the like.

Alternatively, as shown in fig. 2, the island body 20 includes a gravel layer or crushed stone layer laid on the river bed 101, and a bio-medium soil layer 24 laid on the gravel layer or crushed stone layer. The gravel or crushed rock layer extends above the normal water level 102 of the river 10. The biological medium soil layer 24 is planted with various aquatic plants 25 of different species.

The utility model discloses a body 20 lower parts in island are equipped with gravel layer or rubble layer, because gravel or rubble surface roughness just have great specific surface's characteristics, easily the microorganism hangs the membrane, and the great porosity of gravel or rubble simultaneously easily makes rivers pass through, cuts dirty ability reinforce, so through gravel or the degradation of rubble layer hold back, filter, adsorb and microorganism get rid of the river in suspended particle pollutant and the dissolubility organic pollutant, reach water purification's purpose. The aquatic plants 25 at the uppermost layer of the island body 20 mainly have the following functions: (1) the plants fix the biological medium soil layer 24 through the root system, so that the loss of medium soil caused by the fact that the island body 20 is submerged by the flood of the river channel is avoided; (2) the plant root system is utilized to absorb nutrient substances such as nitrogen (N), phosphorus (P) and the like in the river water from the biological medium soil layer 24 and the gravel or the rubble layer, so that the aim of purifying the river water is fulfilled; (3) according to the plant rhizosphere effect, a living place is provided for microorganisms, and photosynthetic products and energy are supplied; (4) the microenvironment of the biological medium soil layer 24 is improved, so that the air permeability and the water permeability of the biological medium soil layer 24 are better, and the types and the number of microorganisms or rhizosphere microorganisms are increased; (5) the good microclimate is suitable for birds to inhabit. The biological medium soil layer 24 is used as a carrier for growth and bearing of aquatic plants and microorganisms, and has the main functions of: (1) the pollutants in the river water are used as nutrient substances of microorganisms and aquatic plants through the capillary action of the biological medium soil layer 24, so that the removal of Chemical Oxygen Demand (COD) and Biochemical Oxygen Demand (BOD) in the river water is achieved₅) Ammonia (NH)₃) The purpose of contaminants such as phosphorus (P); (2) the biological medium soil layer 24 has good air permeability and water permeabilityIn the period of rising river water level and rainfall, the biological medium soil layer 24 has the function of a filter for downward flow, and can effectively intercept and filter suspended matters contained in river water and pollutants in the early period of rainfall; (3) an ideal symbiotic environment is provided for plants and microorganisms, the plant roots provide growing places, nutrition and energy for the microorganisms, otherwise, the metabolism of the microorganisms enhances the decomposition of organic matters and promotes the mineralization of plant nutrient elements, for example, the microorganisms can provide soluble phosphate for the plants by dissolving the phosphate in minerals and accelerate the absorption of the phosphate by the plants, and in addition, the microorganisms can also activate the biological medium soil layer 24 and increase the air permeability and water permeability of the biological medium soil layer 24, thereby creating good conditions for the water absorption, oxygen delivery and respiration of the plant roots.

In the island body 20 of the utility model, the relative density of the gravel layer or the gravel layer is large, and the gravel layer or the gravel layer is not easy to be washed and lost by water; the biological medium soil layer 24 is loose in soil quality and good in air permeability and water permeability, not only provides an ideal symbiotic environment for aquatic plants and microorganisms and improves the effect of treating the water quality of river water, but also can effectively intercept and filter suspended matters contained in the river water and pollutants in the early stage of rainfall during the rising of the water level of the river water and the period of rainfall; the variety of the planted aquatic plants 25 is diversified, the root system function and the rhizosphere effect of various plants are fully exerted, the biological medium soil layer 24 is stabilized, an ideal place is provided for microorganisms and rhizosphere microorganisms, nutrition and energy are supplied, the types and the quantity of the microorganisms are enriched, meanwhile, the plant root system can be used for absorbing the river water, N, P and other nutrient substances from the biological medium soil layer 24 and the gravel layer or the crushed stone layer, the aim of purifying the river water is achieved, a natural, ecological, green and environment-friendly landscape effect is created, thereby the utility model discloses a 20 sets of plants in island body, soil, microorganism, air and river environment constitute a reliable stable natural ecological clean system in coordination, have formed a relatively complete, simple "amphibian, amphibious" circulation biological chain, have richened biological variety, have provided an ideal habitat for the reproduction of animals and plants is lived.

In the embodiment of this alternative, as shown in fig. 2, the gravel layer comprises a coarse gravel layer 21, a medium gravel layer 22 and a fine gravel layer 23 which are laid in this order from bottom to top. A coarse gravel layer 21 is laid on the river bed 101. A layer of biological medium soil 24 is laid on the fine gravel layer 23. The bottommost part of the island body 20 of the utility model is provided with the coarse gravel layer 21 or the gravel layer, the coarse gravel or the gravel has rough surface and the characteristic of larger specific surface area, so that the microorganism can be easily hung on the film, meanwhile, the coarse gravel or the gravel has larger porosity, so that the water flow can easily pass through, the dirt intercepting capability is strong, and the continuous and stable operation can be kept; the middle gravel layer 22 or the crushed stone layer is arranged on the coarse gravel layer 21 or the crushed stone layer, the porosity is reduced due to the small particle size of the middle gravel, and the middle gravel layer 22 or the crushed stone layer is used for blocking the upper fine gravel layer 23 or the crushed stone layer and the lower coarse gravel layer 21 or the crushed stone layer and preventing the upper fine gravel or the crushed stone from falling into the coarse gravel layer 21, and the middle gravel layer 22 or the crushed stone layer also has the characteristics of rough surface, large specific surface area and porosity, and is easy to form a film and intercept dirt; the middle gravel layer 22 or the crushed stone layer is provided with the fine gravel layer 23 or the crushed stone layer, the porosity is reduced due to the smaller particle size of the fine gravel layer 23, the fine gravel layer is used for blocking the upper biological medium soil layer 24 and the lower middle gravel layer 22 or the crushed stone layer, the upper biological medium soil layer 24 is prevented from falling into the middle gravel layer 22, the holes of the gravel or the crushed stone are blocked, the treatment effect is influenced, the fine gravel layer 23 or the crushed stone layer also has the characteristics of rough surface and large specific surface area, and pollutants in river water can be intercepted, adsorbed and degraded by microorganisms.

The utility model discloses ecological island's effect principle: by utilizing an ecological principle and a modern sewage treatment technology, a natural ecological purification system consisting of plants, soil, microorganisms and a river channel is integrally created, on one hand, the traditional concept and the conventional practice of hydraulic engineering are broken through by utilizing the ecological principle, the continuity and the wriggling property of the river channel are restored by reasonably shaping and arranging an ecological island in the river channel, the continuity of the river channel ensures that aquatic organisms such as fishes and the like normally multiply and inhabit, and the wriggling property of the river channel creates a main stream, a branch stream, a river bay, a cardiac beach and a deep pool habitat of the river channel, so that a waterfront space formed by the riverway provides places for fishes, birds, amphibians, insects and the like to multiply and inhabit, thereby forming rich landscape effects, meanwhile, the wriggling form of the river channel can reduce and consume the impact of flood, ensure the stability of the form of a river bed, and weaken the pressure of a downstream river section; on the other hand, by utilizing the modern sewage treatment technology, the characteristic of plug flow type is adopted in the ecological island like the traditional activated sludge process, the function of submerged biological contact oxidation in a similar biomembrane process is exerted, and the function of similar artificial wetland is taken into consideration simultaneously, so that the purification of the water quality of the river channel is realized, and the specific implementation process is as follows: firstly, when the water flow along the river channel is viewed, the river water firstly flows through coarse, medium and fine gravels or a gravel layer in a plug flow manner from gaps of the upstream surrounding pile frame 30 (when the water level of the river channel rises to exceed the normal water level by a certain height, the river water can reach a biological medium soil layer at the same time), and suspended particle pollutants and soluble organic pollutants in the river water are removed through the interception, filtration and adsorption of the gravels or the gravel layer (microorganisms are easy to attach to the gravels or the gravel layer to form a biological membrane), so that the aim of purifying the water quality is fulfilled; secondly, from the vertical view of the ecological island, besides the purifying effect of the gravel or the gravel layer at the bottom, the microbes and the aquatic plants in the biological medium soil layer at the upper part of the island body form a symbiotic relationship, so that pollutants in river water can be further removed, and in conclusion, from the construction of the ecological system, the utility model integrates the plants, the soil, the microbes, the air and the river environment to cooperate to form a reliable and stable natural ecological purifying system, and forms a relatively complete and simple 'amphibious and amphibious' circulating biological chain; in the river water quality purification process, the river water integrally flows to the tail end of the island body in a plug flow manner along the length direction of the ecological island, oxygen is filled into the island body and nutrient substances are conveyed in a natural acting manner from upstream to downstream, and the river water quality purification is efficiently completed through the synergistic effect of gravels or broken stones, microorganisms, medium soil layers and aquatic plants in the ecological island.

Further, the coarse gravel of the coarse gravel layer 21 has a particle size ranging from 30mm to 50 mm. The medium gravel layer 22 has a particle size ranging from 10mm to 15 mm. The fine gravel of the fine gravel layer 23 has a particle size ranging from 3mm to 8 mm.

Furthermore, the height of the coarse gravel layer 21 is 300 mm-400 mm, the height of the medium gravel layer 22 is 100 mm-200 mm, the height of the fine gravel layer 23 is 100 mm-200 mm, and the total height of the coarse gravel layer 21, the medium gravel layer 22 and the fine gravel layer 23 is 50 mm-100 mm higher than the normal water level 102 of the river channel 10, so that the biological medium soil layer 24 is positioned above the water body. The thickness of the biological medium soil layer 24 is 500 mm-600 mm.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A modular ecological island for ecological restoration, characterized in that it is provided in a river (10) to be ecologically restored for constructing a stable, reliable natural ecological purification system for purifying water flow within the river (10), restoring the function of the river (10), and maintaining the continuity and sinuosity of the river (10), the ecological island comprising:

an island body (20) for forming a stable, reliable natural ecological purification system, the island body (20) being constructed on a riverbed (101) of the river channel (10) and an upper end of the island body (20) extending above a normal water level (102) of the river channel (10);

island body (20) periphery is equipped with and is used for stabilizing fender pile frame (30) of island body (20), the lower extreme embedding of fender pile frame (30) riverbed (101) internal fixation, the upper end of fender pile frame (30) extends to more than normal water level (102) of river course (10), be equipped with the business turn over seam on the perisporium of fender pile frame (30), the business turn over seam is used for supplying rivers in river course (10) get into purify in the island body (20), simultaneously to entering and discharge the water yield and the rivers distribution situation of island body (20) are controlled.

2. The modular ecological island for ecological remediation of claim 1,

the ecological island is arranged at the center of the river channel (10), or at a position close to a river bank (103) of the river channel (10) or connected with the river bank (103);

the transverse section of the ecological island is oval, and the long axis of the ecological island faces the extending direction of the river channel (10);

the area of the vertical cross section of the ecological island is smaller than 1/3 of the vertical cross section of the river channel (10) where the ecological island is arranged.

3. The modular ecological island for ecological remediation of claim 1,

the pile enclosing frame (30) comprises a plurality of pile rods (31) which are sequentially arranged at intervals along the circumferential direction of the island body (20), the lower end of each pile rod (31) is embedded into a supporting layer below the riverbed (101), and the upper end of each pile rod (31) extends to a position 500-600 mm above the normal water level (102) of the riverway (10);

the clearance between two adjacent pile rods (31) is 3-10 mm.

4. The modular ecological island for ecological remediation of claim 3,

the gap between two adjacent pile rods (31) of the pile enclosing frame (30) which are arranged vertically to the water flow direction of the river channel (10) is 3-4 mm;

the gap between two adjacent pile rods (31) of the pile enclosing frame (30) which are arranged in parallel with the water flow direction of the river channel (10) is 8-10 mm.

5. The modular ecological island for ecological remediation of claim 3,

the pile rod (31) is a wood pile prepared from wood, or a stone pile prepared from stone, or a concrete pile formed by pouring reinforced concrete;

the cross section of the pile rod (31) is circular or polygonal, and the outer diameter of the pile rod (31) is 100-200 mm.

6. The modular ecological island for ecological remediation of claim 3,

enclose stake frame (30) still include many connecting rods or connect the rope, the connecting rod or connect the rope and be used for linking into an integrated entity many stake pole (31).

7. The modular ecological island for ecological remediation of claim 1,

the island body (20) comprises a gravel layer or a crushed stone layer laid on the river bed (101) and a biological medium soil layer (24) laid on the gravel layer or the crushed stone layer;

the gravel layer or the crushed stone layer extends to the normal water level (102) of the river channel (10) or above;

the biological medium soil layer (24) is planted with various aquatic plants (25).

8. The modular ecological island for ecological remediation of claim 7,

the gravel layer comprises a coarse gravel layer (21), a middle gravel layer (22) and a fine gravel layer (23) which are sequentially paved from bottom to top;

the coarse gravel layer (21) is laid on the river bed (101);

the biological medium soil layer (24) is laid on the fine gravel layer (23).

9. The modular ecological island for ecological remediation of claim 8,

the particle size range of the coarse gravels of the coarse gravel layer (21) is 30-50 mm;

the particle size range of the medium gravel layer (22) is 10-15 mm;

the particle size range of the fine gravel layer (23) is 3mm to 8 mm.

10. The modular ecological island for ecological remediation of claim 8,

the height of the coarse gravel layer (21) is 300-400 mm, the height of the middle gravel layer (22) is 100-200 mm, the height of the fine gravel layer (23) is 100-200 mm, and the sum of the heights of the coarse gravel layer (21), the middle gravel layer (22) and the fine gravel layer (23) is 50-100 mm higher than the normal water level (102) of the river channel (10);

the thickness of the biological medium soil layer (24) is 500-600 mm.

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