Full-section slope protection method for pumped storage power station bank soil gentle slope and pumped storage power station bank

Abstract

The invention belongs to the technical field of pumped storage power station libraries, and provides a full-section slope protection method for a pumped storage power station library bank soil gentle slope and a pumped storage power station library, the pumped storage power station library bank soil gentle slope is partitioned along a vertical section, and then different protection measures are taken for different regions; on the basis of solving the problems of slope erosion of a reservoir bank soil gentle slope and overall bank slope instability caused by reservoir area water level change, the situation that the ecological landscape function is damaged can be avoided; meanwhile, a Reynolds protection pad is arranged in a normal water level change area, an ecological planting bag is arranged on the Reynolds protection pad, and emergent aquatic plants and herbaceous plants are planted on the ecological planting bag, so that the protection stability of an area in which the water level alternately rises and falls can be ensured, and the herbaceous plants are planted by adopting a three-dimensional vegetation net pad in an abnormal water level change area; on the basis of avoiding increasing the cost and the construction period, the problem that the normal water level change area is affected after the abnormal water level change area is damaged under the flood conditions such as heavy rainwater is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of pumped storage power stations, and in particular relates to a full-section slope protection method for a gentle slope of a reservoir bank of a pumped storage power station and a pumped storage power station. Background Art

[0002] One of the main functions of a pumped-storage power station is to use excess electricity to pump water from the lower reservoir to the upper reservoir for storage during periods of low load in the power system, and to use the water from the upper reservoir to generate electricity during peak load periods to meet electricity demand during peak hours. This process causes the water level in the reservoir area to fluctuate greatly and rise and fall frequently.

[0003] For the gentle slope of the reservoir bank of the pumped storage power station, the objective situation that the water level in the reservoir area fluctuates greatly and rises and falls frequently will not only cause soil erosion on the surface of the slope and overall instability of the slope, but also the entire slope section from the underwater area at the bottom of the slope to the land area and vegetation community at the top of the slope, especially the ecological and landscape functions of the water level fluctuation zone will inevitably be damaged. Specifically, due to the drastic and frequent changes in the water level in the reservoir area, the mechanical properties of the soil on the slope will degrade during the alternating rise and fall of the water level, and the surface soil will be prone to loosening, sliding or even collapse, thereby threatening the overall stability and safety of the slope; not only that, some native vegetation on the slope with poor water resistance may be difficult to survive due to repeated flooding, resulting in the overall or partial exposure of the slope, which further aggravates the soil erosion on the slope and seriously damages the ecological and landscape functions of the reservoir slope. In the current protection plan, the damage is particularly serious in the area where the water level rises and falls alternately, and the upper area will also be damaged in the case of flooding with heavy rain, which will affect the area where the water level rises and falls alternately and increase the speed and degree of destruction in the area where the water level rises and falls alternately; while focusing on reinforcing the area where the water level rises and falls alternately and the area above it will greatly increase the cost and construction period, and in the area where the water level rises and falls alternately, it is difficult to carry out effective reinforcement measures due to the scouring of the alternately rising and falling water level. After long-term and frequent operation, the pumped-storage power station is severely damaged. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a full-section slope protection method for the soil gentle slope of the bank of a pumped-storage power station and a pumped-storage power station reservoir, the soil gentle slope of the bank of the pumped-storage power station is divided into a plurality of areas, and different protection measures are taken for different areas through Reynolds mats for bottom protection, ecological planting bags and different types of plants, so that the damage to the ecological landscape function can be avoided on the basis of solving the problems of slope erosion and overall instability of the soil gentle slope of the bank caused by water level changes in the reservoir area; at the same time, Reynolds mats are arranged in the normal water level change area, ecological planting bags are arranged on the Reynolds mats, and emergent plants and herbaceous plants are planted on the ecological planting bags, so that the protection stability of the area where the water level alternately rises and falls can be ensured, and in the abnormal water level change area, three-dimensional vegetation mesh mats are used to plant herbaceous plants, so that the problem of affecting the normal water level change area after the abnormal water level change area is damaged under flood conditions such as heavy rain is solved on the basis of avoiding increasing costs and construction period.

[0005] In order to achieve the above-mentioned object, in the first aspect, the present invention provides a full-section slope protection method for a gentle slope of a reservoir bank of a pumped storage power station, which adopts the following technical scheme:

[0006] A full-section slope protection method for a gentle slope of a pumped storage power station reservoir bank, comprising:

[0007] Along the vertical section, the gentle slope of the reservoir bank of the pumped storage power station is divided into the perennially flooded area, the normal water level change area, the abnormal water level change area and the landscape restoration area;

[0008] Different protection measures are adopted for different areas. In the perennially flooded area, Reno mats are installed to protect the bottom and aquatic plants. In the area with normal water level changes, Reno mats are installed, and ecological planting bags are installed on the Reno mats, and emergent plants and herbaceous plants are planted on the ecological planting bags. In the area with abnormal water level changes, three-dimensional vegetation mesh mats are used to plant herbaceous plants. In the landscape restoration area, vetiver is planted.

[0009] Furthermore, the perennially flooded area refers to the slope area from the bottom of the slope to the dead water level of the reservoir, which is in a perennially flooded state; the normal water level change area refers to the slope drawdown zone from the dead water level to the normal water storage level, where the water level changes frequently; the abnormal water level change area refers to the slope area between the normal water storage level and the verified flood level, which is an extension of the normal water level change area to the upper slope and is only flooded in flood conditions; the landscape restoration area refers to the terrestrial slope area connected to the verified flood level to the lower limit of the original natural vegetation community.

[0010] Furthermore, a Reynolds mattress is arranged in the perennially flooded area, and weathered rocks are loaded into the Reynolds mattress for filling.

[0011] Furthermore, when aquatic plants are arranged in the perennially flooded area, a floating bed is used to support the aquatic plants; the aquatic plants are arranged to be Vallisneria, Ceratophyllum, Potamogeton and / or Euryale ferox.

[0012] Furthermore, when slope protection is performed in the normal water level change area, a Reno cushion layer is laid on the slope surface, and the Reno cushion layer includes a plurality of Reno cage connection structures, and each Reno cage includes a Reno cushion cover plate, a Reno cushion side plate, a Reno cushion end plate and a Reno cushion bottom plate; each Reno cage is separated into independent units by partitions at preset intervals;

[0013] A layer of gravel is laid on the bottom plate of the Reno mattress, and multiple ecological planting bags are laid flat on the gravel layer in each Reno cage; adjacent ecological planting bags are connected by ecological bag connecting buckles;

[0014] Cover with the Reno mat cover plate and fix the Reno mat together with the ecological planting bag on the slope with anchor nails.

[0015] Furthermore, the distribution of emergent plants and herbaceous plants in the normal water level change zone is as follows: reeds, calamus and / or cattails are planted in the slope section within one-third of the height range below the normal water level change zone; and bahia grass, vetiver, Achnatherum splendens and / or Spartina alterniflora are planted in the slope section within two-thirds of the height range above the normal water level change zone.

[0016] Furthermore, the three-dimensional vegetation net is filled with soil, gravel and fine stones for plant roots to pass through.

[0017] Furthermore, when planting vetiver, vetiver is planted after being mixed with other auxiliary grasses with well-developed root systems.

[0018] Furthermore, the planted vetiver is maintained for a preset number of days; when planting vetiver, the materials include vetiver, bahia grass, berberis, soil conditioner and vetiver fertilizer.

[0019] In order to achieve the above object, in a second aspect, the present invention also provides a pumped storage power station, which adopts the following technical solution:

[0020] A pumped storage power station reservoir, the gentle soil slope of the bank of the pumped storage power station reservoir is obtained by the full-section slope protection method of the gentle soil slope of the bank of the pumped storage power station reservoir as described in the first aspect.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The gentle slope of the reservoir bank of the pumped storage power station is divided into the perennial inundation area, the normal water level change area, the abnormal water level change area and the landscape restoration area. Then, different protection measures are taken for different areas through Reno mats, ecological planting bags and different types of plants. This can avoid the damage of ecological landscape functions on the basis of solving the slope erosion and overall instability of the gentle slope of the reservoir bank caused by the water level change in the reservoir area. At the same time, Reno mats are set in the normal water level change area, and ecological planting bags are set on the Reno mats, and emergent plants and herbaceous plants are planted on the ecological planting bags. This can ensure the protection stability of the area where the water level alternately rises and falls, and in the abnormal water level change area, three-dimensional vegetation mesh mats are used to plant herbaceous plants. On the basis of avoiding increasing costs and construction period, the problem of affecting the normal water level change area after the abnormal water level change area is damaged under flood conditions such as heavy rain is solved.

[0023] 2. The enhanced ecological slope protection technology in the present invention is used for key protection in water level change areas. A slope protection solution combining Reynolds mats, gravel and ecological planting bags is adopted. The Reynolds mat bottom plate and gravel layer are used to improve the basic conditions of the bank slope soil in the water level change area. The ecological bag connecting buckles are used to achieve a tight lateral connection between the ecological planting bags. The anchor nails are used to achieve a firm longitudinal connection between the ecological planting bags, the Reynolds mats and the bank slope soil. This solves the problem of softening the bank slope soil foundation and difficulty in anchoring due to water level changes during use of ecological planting bags in areas with normal water level changes, effectively ensuring the overall stability and safety of the bank slope against scouring and sliding, and at the same time providing a stable and permeable planting foundation for slope protection vegetation.

[0024] 3. The ecological protection method of the present invention realizes full-section coverage of vertical protection of the bank slope, from the underwater area at the bottom of the bank slope to the land and vegetation community at the top of the bank slope, constructing a three-dimensional green vegetation bank slope protection system from water to land.

[0025] 4. The ecological protection method of the present invention reasonably divides the vertical section protection area of ​​the bank slope according to the unique hydrodynamic conditions of the pumped storage reservoir area, and implements targeted ecological protection measures based on the hydrodynamic characteristics of each zone, optimizes the combination of various types of slope protection technologies and ecological management technologies, avoids the blindness of ecological restoration, and can maximize the engineering and ecological benefits of various technologies. It solves the ecological fragility problem of bank slope vegetation being difficult to survive due to the objective situation of large water level fluctuations and frequent rises and falls in the reservoir area, so that bank slope management achieves green ecological restoration in the true sense.

[0026] 5. The Reno cushion bottom protection measure in the present invention is used to protect the bank slope from being eroded by water flow. It has the advantages of high strength and strong adaptability to the foundation. When used in conjunction with the floating bed technology for planting aquatic plants, it not only ensures the safety of the bottom of the bank slope, but also realizes the effective expansion of the green protection system to the water area.

[0027] 6. The enhanced ecological slope protection technology in the present invention takes into account the large daily fluctuation of water levels, and plants emergent vegetation and herbaceous vegetation with good water resistance in the upper and lower parts of the water level fluctuation area, respectively, taking into account the reasonable combination of plant measures and engineering measures, as well as the natural transition of vegetation communities from aquatic environment to terrestrial environment.

[0028] 7. The management of landscape restoration areas in the present invention not only focuses on whether the vegetation technology can be successfully implemented, but also pays more attention to whether the vegetation measures and slope protection structures taken are coordinated with the local natural landscape, including the symbiosis between the selected slope protection vegetation and the original vegetation community, avoiding the rigidity of ecological restoration measures and even the negative impact on the ecological environment.

[0029] 8. The present invention can eliminate the adverse effects caused by large fluctuations and frequent rises and falls of the water level in the reservoir area, and solve the problems of slope erosion, overall instability of the bank slope and damage to the ecological landscape function caused by changes in the water level in the reservoir area. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings in the specification that constitute a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments of this embodiment and their descriptions are used to explain this embodiment and do not constitute improper limitations on this embodiment.

[0031] Figure 1 This is a schematic diagram of ecological protection zoning of a vertical section of a gentle slope of a pumped storage reservoir bank according to Example 1 of the present invention;

[0032] Figure 2 This is a schematic diagram of a full-section green ecological slope protection structure for a gentle slope of soil on the bank of a pumped storage power station according to Example 1 of the present invention;

[0033] Figure 3 This is a schematic cross-sectional view of the reinforced ecological slope protection structure in the normal water level change area of ​​Example 1 of the present invention;

[0034] Figure 4 This is a schematic diagram of a Reynolds pad mesh box according to Example 1 of the present invention;

[0035] Among them, 1. Reno mattress bottom plate; 2. Gravel layer; 3. Ecological planting bag; 4. Connecting buckle; 5. Reno mattress side plate; 6. Reno mattress cover plate; 7. Vegetation; 8. Anchor nails; 9. Reno mattress end plate; 10. Reno mattress partition. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0038] Embodiment 1:

[0039] One of the main functions of a pumped storage power station is to use excess electricity to pump water from the lower reservoir to the upper reservoir for storage during the off-peak period of the power system, and to use the water from the upper reservoir to generate electricity during the peak load period to meet the power demand during the peak period. This process makes the change of the water level in the reservoir area have the following characteristics:

[0040] Large water level fluctuation: The daily water level fluctuation of pumped storage power stations is usually large, generally exceeding 10 to 20 meters, and some power stations reach 30 to 40 meters. Frequent lifting and lowering: Due to the need to frequently pump water to the upper reservoir during low periods and release water for power generation during peak periods, the water level of pumped storage power stations changes rapidly, generally reaching 5 to 8 meters per hour, or even 8 to 10 meters per hour. This frequent lifting and lowering operation is the core mechanism of the operation of pumped storage power stations and is also the key to their ability to quickly respond to changes in power system load.

[0041] For the gentle slope of the reservoir bank of the pumped storage power station, the objective situation of large fluctuations in the water level in the reservoir area and frequent rise and fall may not only cause soil erosion on the surface of the slope and overall instability of the slope, but also the ecological and landscape functions of the entire slope section from the underwater area at the bottom of the slope to the land and vegetation community at the top of the slope, especially the water level fluctuation zone, will inevitably be damaged. Specifically, due to the drastic and frequent changes in the water level in the reservoir area, the mechanical properties of the soil on the slope may degrade during the alternating rise and fall of the water level, and the surface soil may loosen, slide or even collapse, thereby threatening the overall stability and safety of the slope. In addition, some native vegetation on the slope with poor water resistance may find it difficult to survive due to repeated flooding, resulting in the overall or partial exposure of the slope, which further aggravates the soil erosion on the slope and seriously damages the ecological and landscape functions of the reservoir slope.

[0042] In order to solve the problems of large fluctuations and frequent ups and downs in the water level in the reservoir area of ​​pumped-storage power stations, which cause slope erosion on the gentle slope of the reservoir bank, overall instability of the bank slope, and damage to the ecological landscape function, it is of great engineering practical significance to implement targeted zoning ecological protection measures for the entire vertical section of the bank slope, especially the water level change area.

[0043] In order to solve at least one of the above problems, Figure 1 and Figure 2As shown, this embodiment provides a full-section slope protection method for the gentle slope of the reservoir bank of a pumped-storage power station, which can solve the problems of slope erosion, overall instability of the slope, and damage to the ecological landscape function of the gentle slope of the reservoir bank caused by changes in the water level in the reservoir area.

[0044] In the method, based on the hydrodynamic characteristics of the reservoir area, the vertical section of the bank slope is divided from low to high into perennial flooding area, normal water level change area, abnormal water level change area and landscape restoration area, and different slope protection technologies and vegetation schemes are used in different areas. The method includes the following steps:

[0045] S1. According to the water level in the pumped-storage power station reservoir, the gentle slope of the pumped-storage power station reservoir bank is divided into perennial inundation area, normal water level change area, abnormal water level change area and landscape restoration area on the vertical section along the entire bank slope of the pumped-storage power station reservoir.

[0046] Optionally, the gentle slope of soil on the reservoir bank refers to a slope in the reservoir area that is mainly composed of soil and has a relatively gentle slope. Its slope is usually less than 25°, which is a classification relative to a steep slope. The stability of the gentle slope of soil on the reservoir bank directly affects the safety of the reservoir and the environment around the reservoir. The prevention and control measures for gentle slopes are different from those for steep slopes, adhering to the management concept of combining slope stability and safety with ecological balance and natural recovery.

[0047] The full section of the gentle slope of the bank of the pumped-storage power station refers to the entire vertical section from the underwater area at the bottom of the slope to the land and vegetation community at the top of the slope.

[0048] The hydrodynamic characteristics of the reservoir area mainly refer to the dynamic characteristics of the water flow in the reservoir area, which are mainly manifested in the water level of the reservoir area, including: dead water level, which refers to the lowest water level that the reservoir is allowed to drop to under normal operation; normal water storage level, which refers to the upper limit water level that the reservoir is allowed to store water for beneficial purposes under normal operation; verification flood level, which refers to the highest flood level reached by the reservoir (in front of the dam) when the dam encounters a verification flood, and is the highest water level allowed to be reached by the reservoir in a short period of time under extraordinary operation.

[0049] S2. Use different protective measures for different areas:

[0050] S2.1. In perennially flooded areas, the main focus is on bottom protection, using Reno mats for bottom protection and floating bed technology for aquatic plant planting, with submerged and floating aquatic plants selected.

[0051] The so-called perennially flooded area refers to the area on the slope from the bottom of the slope to the dead water level of the reservoir. It is in a perennially flooded state and it is necessary to pay attention to the protection of the soil at the bottom of the slope. It is suitable for planting submerged and floating aquatic plants.

[0052] Optionally, the Reno cushion bottom protection measure refers to setting a flexible cushion-shaped engineering component composed of a machine-woven double-twisted hexagonal metal mesh with a thickness of 0.17m, a length of 5m, and a width of 2m, and filling the cushion with fresh or slightly weathered rocks and other fillers and then laying it at the bottom of the bank slope. It is used to protect the bank slope from being scoured by water flow and has the advantages of high strength and strong adaptability to the foundation.

[0053] Optionally, the floating bed technology for aquatic plant planting refers to a technology that uses a floating bed to support aquatic plants, so that aquatic plants grow in a relatively fixed area to form a vegetation cover layer to improve water quality and ecological environment. It is mainly used for water body management and landscape restoration projects. You can choose from the products and models currently on the market. Vegetation includes submerged plants such as Vallisneria, Dermatophyte, and Water Chestnut, as well as floating plants such as Euryale.

[0054] S2.2. In the area of ​​normal water level fluctuation, emphasis is placed on the stability, durability and erosion resistance of the slope protection structure, and an enhanced ecological slope protection technology combining Reno mats with ecological planting bag slope protection technology, as well as a vegetation planting plan combining emergent plants and herbaceous plants, is adopted.

[0055] The normal water level change zone refers to the bank slope drawdown zone from the dead water level to the normal water storage level. The water level changes frequently, and the bank slope soil and vegetation often experience drastic changes in water level in a short period of time. It is a key area for vertical protection of the bank slope. Under the influence of water level changes, the strength of the bank slope soil will be significantly reduced, and it will be more susceptible to water erosion, resulting in increased soil erosion and harm to the stability of the bank slope. Therefore, it is necessary to strengthen the bank slope soil protection measures and pay attention to the stability, durability and anti-scouring ability of the slope protection structure. In addition, the frequent changes in water levels also have higher requirements on the water resistance of vegetation. It is necessary to adopt a vegetation plan that combines emergent plants and herbaceous plants with good water resistance to take into account the ecological and landscape functions of the slope protection.

[0056] Optionally, the ecological planting bag slope protection technology refers to the technology of using ecological bags for slope management and protection. It has a targeted water-permeable and soil-impermeable filtering function, and has the advantages of moisture resistance, biodegradation resistance, aging resistance, UV resistance and zero pollution. It has great advantages in resisting slope erosion caused by vertical rise and fall of water levels and rain. Plant roots can grow freely through the bag body, forming an anchoring effect between the ecological bag and the slope soil, and finally forming a stable and durable green ecological slope. At present, there are related ecological planting bag products on the market to choose from. However, the ecological planting bag slope protection technology is also subject to certain limitations in practical applications. It is more suitable for hard foundations, that is, it requires that the slope foundation has no obvious settlement and deformation. At the same time, there is also the problem that the ecological bag is not easy to anchor on ordinary slopes.

[0057] The enhanced ecological slope protection technology in the area with normal water level fluctuations refers to the slope protection measures combining Reno pads with ecological planting bags to solve the problem that the ecological planting bags have high requirements on the bank slope foundation and are difficult to anchor. Figure 3 and Figure 4 As shown, the specific implementation steps and methods are:

[0058] S2.2.1. A layer of Reno mat is laid on the slope. The Reno mat layer is composed of several Reno cages connected together. Each Reno cage is composed of a Reno mat cover plate 6, a Reno mat side plate 5, a Reno mat end plate 9, a Reno mat partition plate 10 and a Reno mat bottom plate 1. The optional specifications are 0.4m thick, 2m wide and 6m long. Double partitions are used to separate the inner space into independent units every 1m. The Reno mat is produced in one-time molding. Except for the cover plate, the side plates, end plates, partition plates and bottom plates are inseparable. At this time, there is no filler in the mat.

[0059] S2.2.2. Lay a 0.15m thick gravel layer 2 on the Renault pad bottom plate 1, with a stone particle size range of 7cm to 15cm, d 50 =12cm, the gravel layer 2 and the Reno cushion bottom plate 1 work together to effectively improve the overall strength of the soil slope and adapt to the uneven settlement of the foundation. At the same time, it has good water permeability and air permeability, providing a reliable hard foundation for the laying of the ecological planting bag 3.

[0060] S2.2.3. Because the bank slope is a gentle slope of soil, only one layer of ecological planting bags 3 needs to be laid on the gravel layer 2. The ecological planting bags 3 are also called vegetation bags or greening bags. Their specifications are 0.25m thick, 0.4m wide, and 0.5m long. The bags are connected by ecological bag connecting buckles 4. The ecological bag connecting buckles 4 are usually made of high-strength, corrosion-resistant linear materials. Two adjacent ecological planting bags 3 are connected by bundling or the like, which can ensure that the ecological planting bags 3 are still tightly connected under harsh environmental conditions.

[0061] S2.2.4. Cover the Reno mattress with a cover plate 6 and fix the Reno mattress together with the ecological planting bag 3 therein on the bank slope with anchor nails 8; the ecological planting bag 3 is used for planting vegetation 7.

[0062] The vegetation planting plan combining emergent plants and herbaceous plants in the area of ​​normal water level fluctuation refers to the selection of easy-to-maintain emergent plants such as reeds, calamus, and cattails in the slope section about one-third of the height range below the area of ​​normal water level fluctuation; and the planting of herbaceous vegetation with good water resistance such as bahia grass, vetiver, Achnatherum splendens, and Spartina alterniflora in the slope section about two-thirds of the height range above the area of ​​normal water level fluctuation.

[0063] S2.3. In areas with abnormal water level changes, the main purpose is to prevent slope erosion, and a slope protection technology combining three-dimensional vegetation mesh mats with water-resistant herbaceous plants is used.

[0064] The abnormal water level change zone refers to the slope area between the normal water storage level and the verified flood level, which is the extension of the normal water level change zone to the upper slope. It is only occasionally flooded under special hydrodynamic characteristics such as floods. Therefore, it is also necessary to properly consider the impact of water level changes on soil and vegetation, mainly to resist slope scouring caused by rainfall. It is suitable for planting herbaceous plants with root reinforcement measures and good water resistance.

[0065] Optionally, the three-dimensional vegetation net is a three-dimensional network-like geosynthetics used for planting grass and consolidating soil. It is waterproof, anti-corrosive, anti-aging, and hydrolysis-resistant. The mesh gaps can be filled with soil, gravel, and fine stones, allowing plant roots to pass through and grow evenly. Before the grass grows, the three-dimensional vegetation net can protect the slope from wind and rain erosion. After the grass grows, it forms a strong green composite mechanical interlocking system with the net mat and soil, which plays a role in draining water, consolidating soil, and protecting the slope. There are currently a variety of mass-produced products and models available on the market.

[0066] S2.4. In the landscape restoration area, focus on the coordination between the ecological slope protection and the surrounding environment, and adopt the vegetation solution of Vetiver technology.

[0067] The landscape restoration area refers to the land slope area above the verified flood level and connected with the lower limit of the original natural vegetation community. The situation of reservoir water flooding can be ignored, and the focus is on the coordination between the slope protection structure and the natural landscape, as well as the symbiosis between the selected slope protection vegetation and the original vegetation community.

[0068] Optionally, the vetiver technology refers to a comprehensive application technology in which vetiver is mixed with other auxiliary grasses with relatively developed root systems, planted according to correct planning and design, and then after about 60 days of professional maintenance and management, a high-density above-ground hedge and a high-strength underground biological wall are quickly formed. The main materials are vetiver, bahia grass, sedge, soil conditioner, vetiver-specific fertilizer, etc.

[0069] Embodiment 2:

[0070] This embodiment provides a pumped storage power station, and the gentle slope of the bank of the pumped storage power station is obtained by the full-section slope protection method of the gentle slope of the bank of the pumped storage power station as described in Example 1.

[0071] The above description is only a preferred embodiment of the present embodiment and is not intended to limit the present embodiment. For those skilled in the art, the present embodiment may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment shall be included in the protection scope of the present embodiment.

Claims

1. A full-section slope protection method for a gentle slope on the bank of a pumped storage power station, characterized in that: include: Along the vertical section, the gentle slope of the reservoir bank of the pumped storage power station is divided into the perennially flooded area, the normal water level change area, the abnormal water level change area and the landscape restoration area; Different protection measures are adopted for different areas. In the perennially flooded area, Reno mats are installed to protect the bottom and aquatic plants. In the area with normal water level changes, Reno mats are installed, and ecological planting bags are installed on the Reno mats, and emergent plants and herbaceous plants are planted on the ecological planting bags. In the area with abnormal water level changes, three-dimensional vegetation mesh mats are used to plant herbaceous plants. In the landscape restoration area, vetiver is planted.

2. The full-section slope protection method for a gentle slope on the bank of a pumped storage power station as claimed in claim 1, characterized in that: The perennially flooded area refers to the slope area from the bottom of the slope to the dead water level of the reservoir, which is in a perennially flooded state; the normal water level change area refers to the slope drawdown zone from the dead water level to the normal water storage level, where the water level changes frequently; the abnormal water level change area refers to the slope area between the normal water storage level and the verified flood level, which is an extension of the normal water level change area to the upper slope and is only flooded in flood conditions; the landscape restoration area refers to the land slope area connecting the verified flood level to the lower limit of the original natural vegetation community.

3. The full-section slope protection method for a gentle slope on the bank of a pumped storage power station according to claim 1, characterized in that: A Reynolds mat is arranged in the perennially flooded area, and weathered rocks are loaded into the Reynolds mat for filling.

4. The full-section slope protection method for a gentle slope on the bank of a pumped storage power station as claimed in claim 1, characterized in that: When aquatic plants are arranged in the perennially flooded area, a floating bed is used to support the aquatic plants; the aquatic plants are arranged to be Vallisneria, Ceratophyllum, Potamogeton and / or Euryale ferox.

5. The full-section slope protection method for a gentle slope of a pumped storage power station reservoir bank as claimed in claim 1, characterized in that: When slope protection is performed in the area with normal water level changes, a Reno cushion layer is laid on the slope surface, wherein the Reno cushion layer includes a plurality of Reno cage connection structures, each Reno cage includes a Reno cushion cover plate, a Reno cushion side plate, a Reno cushion end plate and a Reno cushion bottom plate; each Reno cage is separated into independent units by partitions at preset intervals; A layer of gravel is laid on the bottom plate of the Reno mattress, and multiple ecological planting bags are laid flat on the gravel layer in each Reno cage; adjacent ecological planting bags are connected by ecological bag connecting buckles; Cover with the Reno mat cover plate and fix the Reno mat together with the ecological planting bag on the slope with anchor nails.

6. The full-section slope protection method for a gentle slope on the bank of a pumped storage power station as claimed in claim 5, characterized in that: The distribution of emergent plants and herbaceous plants in the normal water level fluctuation zone is as follows: reeds, calamus and / or cattails are planted in the slope section within the one-third height range below the normal water level fluctuation zone; and bahia grass, vetiver, Achnatherum splendens and / or Spartina alterniflora are planted in the slope section within the two-thirds height range above the normal water level fluctuation zone.

7. The full-section slope protection method for a gentle slope on the bank of a pumped storage power station as claimed in claim 1, characterized in that: The three-dimensional vegetation net is filled with soil, gravel and fine stones for plant roots to pass through.

8. The full-section slope protection method for a gentle slope of a pumped storage power station reservoir bank as claimed in claim 1, characterized in that: When planting vetiver, mix it with other auxiliary grasses with well-developed root systems before planting.

9. The full-section slope protection method for a gentle slope on the bank of a pumped storage power station as claimed in claim 1, characterized in that: The planted vetiver is maintained for a preset number of days; when planting vetiver, the materials include vetiver, bahia grass, berberis grass, soil conditioner and vetiver fertilizer.

10. A pumped storage power station, characterized in that: The gentle slope of soil on the bank of a pumped storage power station is obtained by the full-section slope protection method for the gentle slope of soil on the bank of a pumped storage power station as described in any one of claims 1-9.

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