Ecological restoration method for extra-high-voltage engineering in Sagomean area

Abstract

The invention discloses an ecological restoration method for extra-high voltage engineering in a Saggoga region, and relates to the technical field of ecological restoration, and the method comprises the following steps: S1, prevention and control measures: firstly, incorporating an ecological restoration technology into a water and soil conservation scheme report; 2, red line control: arranging a hard fence limit in a manner of inwards shrinking for 5 meters along the land acquisition red line of the soil piling area; s2, performing engineering measures; and S4, monitoring, management and protection measures are carried out, the management and protection area is 4.8562 hm < 2 >, the monitoring time is from grass seed sowing to water conservation acceptance inspection, and monitoring is carried out once a month. According to the ecological restoration method for the extra-high-voltage engineering in the Sagomei district, four measures including a prevention and control measure, an engineering measure, a biological measure and a monitoring and management measure are innovatively put forward and applied around ecological restoration of a soil heaping area, and vegetation restoration in the Ningxia Sagomei district can be effectively achieved for reference of subsequent engineering with similar land properties.

Description

Technical Field

[0001] The present invention relates to the technical field of ecological restoration, and in particular to an ecological restoration method for ultra-high voltage engineering in Shagohuang area. Background Art

[0002] The Zhongning ±800 kV converter station, which is currently under the construction and management of the East China Engineering Construction Department, belongs to the ±800 kV UHV DC transmission project from Ningxia to Hunan. This is the first DC transmission line from the Shagohuang base to start feasibility study. It will become a representative project for the country's new energy supply and consumption and the implementation of the "dual carbon" goals and tasks, and has important demonstration and symbolic significance.

[0003] One of the prerequisites for the completion acceptance of the project is the passing of the water and soil conservation acceptance, and the ecological restoration of the soil dumping area is the focus of water and soil conservation. In order to restore the soil dumping area disturbed by occupation and excavation as soon as possible, and to ensure the sustainable use of land resources around the project, the currently commonly used ecological restoration method is to directly plant vegetation for restoration. The direct planting of vegetation, on the one hand, will still cause soil and water erosion problems in the early stage of planting, and on the other hand, it is impossible to carry out systematic restoration, which has no reference effect for subsequent projects of similar land nature. In view of this, this application proposes an ecological restoration method for ultra-high voltage projects in the Shagohuang area. Summary of the invention

[0004] The invention discloses an ecological restoration method for an ultra-high voltage project in a Shagohuang area, aiming to solve the technical problems in the background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A method for ecological restoration of a UHV project in the Shagohuang area comprises the following steps:

[0007] S1 Preventive Control Measures

[0008] The first is to incorporate ecological restoration technology into the soil and water conservation plan report.

[0009] The second is red line control. Along the land acquisition red line of the earth pile area, a hard fence limit is set 5 meters inward. Before starting construction, the road from the exit to the earth pile area is planned, and colorful flag limits are set to control vehicle routes and the scope of earth occupation to avoid encroaching on land outside the red line.

[0010] S2 Engineering Measures

[0011] (1) Land leveling

[0012] (2) Land tillage

[0013] S3 Biological measures

[0014] (1) Sowing grass seeds

[0015] The selection of suitable planting species is the key to ecological reconstruction. According to the geographical location of the project area and the local climatic conditions, the soil pile area adopts the scheme of pre-buried grass grid sand barriers and mixed sowing of sweet clover, Inner Mongolian ice grass, foxtail grass and millet. Due to the shortage of water in the project area, Zhongning Station has set up two sets of domestic sewage treatment devices in the temporary construction area.

[0016] (2) Apply organic fertilizer

[0017] S4 Monitoring and Maintenance Measures

[0018] The management area is 4.8562hm 2 The monitoring period starts from sowing grass seeds until the completion of water conservation acceptance, and monitoring is carried out once a month.

[0019] In a preferred embodiment, the hard fence used in step S1 is a wire mesh fence, which is welded with 3-5mm thick low-carbon steel wire, with a mesh size of 50x150mm, and the mesh is bent to achieve both aesthetics and enhanced impact resistance. The pillars are trapezoidal columns with an upper side of 5cm and a lower side of 8cm, a 135-degree elbow on the top, and a 200x200mm flange welded at the bottom; finally, after the wire mesh fence is completed, it is hot-dip galvanized and electrostatically sprayed with high-quality polyester powder, and the spray color adopts the internationally popular RAL color.

[0020] By setting up hard fences, the ecological restoration area can be effectively isolated to prevent irrelevant personnel from entering and causing damage.

[0021] In a preferred scheme, in step S2, due to the damage and occupation of land by the construction project, the original land morphology is changed, resulting in an uneven land surface, which is not conducive to subsequent land tillage and manual pre-embedding of grass grids. Therefore, land leveling is required, wherein land leveling mainly uses mechanical trimming and backfilling of topsoil in the soil pile area, and controls the ground slope to not exceed 20 degrees.

[0022] By using mechanical trimming and backfilling of topsoil, the structural strength of the soil in the restoration area can be effectively guaranteed, laying a good foundation for ecological restoration.

[0023] In a preferred embodiment, in step S2, the land needs to be plowed to meet the needs of later grassland recovery, break the compacted layer, loosen the soil, increase water permeability and air permeability, and improve the drought and waterlogging resistance of the land; the land is loosened mechanically with a loosening depth of not less than 30 cm.

[0024] By plowing the land, the soil can be effectively transported and the soil's water and air permeability can be increased.

[0025] In a preferred embodiment, in step S3, the ratio of sweet clover, Inner Mongolian wheat grass, foxtail grass and millet is 1:1:1:1, wherein the sowing amount of sweet clover, Inner Mongolian wheat grass and foxtail grass is 60kg / hm 2 , the sowing rate of millet is 38kg / hm 2 , and replanting is carried out at 20%, and the grass planting time is generally chosen in the rainy season to increase the survival rate.

[0026] By planting a mixture of sweet clover, Inner Mongolian wheatgrass, foxtail grass and millet, the most suitable planting plants for the soil in the restoration area can be determined.

[0027] In a preferred embodiment, in step S3, the rated capacity of the domestic sewage treatment device is 180m 3 / day, 60m 3 / day, with an average daily water output of 150m 3 The soil pile area is connected to the recycled water for irrigation.

[0028] By installing two domestic sewage treatment devices, the soil pile area can be fully irrigated to ensure the moisture required for vegetation growth.

[0029] In a preferred solution, in step S3, according to local reclamation experience, the area of ​​natural pasture for reclamation is restored to soil fertility by applying organic fertilizer, and the fertilization area is 4.8562hm 2 According to the "Supplementary Standards for Budget Quotas of Land Development and Reclamation Projects in Ningxia Hui Autonomous Region", the fertilizer standard is 4500kg / hm 2 .

[0030] By basing ourselves on local reclamation experience, we can apply fertilizers more accurately.

[0031] In a preferred solution, in step S4, the monitoring content is mainly to monitor the ecological restoration effect, that is, to monitor the vegetation in terms of plant growth, height, coverage, grass production, etc., and to replant areas with poor growth.

[0032] By replanting areas with poor growth, the ecological restoration of the soil pile area can be effectively achieved.

[0033] From the above, it can be seen that the present invention provides a method for ecological restoration of ultra-high voltage engineering in Shagohuang area, and innovatively proposes and applies four major measures around the ecological restoration of the soil pile area, namely, preventive control measures, engineering measures, biological measures, and monitoring and protection measures, which can effectively achieve vegetation restoration in the Shagohuang area of ​​Ningxia, and provide reference for subsequent projects with similar land properties; at the same time, the present invention has opened up a vegetation restoration test field, which is divided into four areas. The grass seeds are Inner Mongolia ice grass and Artemisia sphaerocephala, and the water sources are recycled water and tap water, which are matched in pairs, for a total of four combinations; the test phenomenon is that the ice grass area grows well, and Artemisia sphaerocephala is planted once in May and replanted once in July, but it did not germinate. The test results show that there is no obvious difference in the maintenance effect of tap water or recycled water, and the vegetation restoration result mainly depends on the grass seed variety. Ice grass is suitable for ecological restoration in this area, while Artemisia sphaerocephala is not suitable. Therefore, the ecological restoration of the soil pile area excludes Artemisia sphaerocephala recommended by the original special design for environmental water and soil conservation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is an overall flow chart of the ecological restoration method for the UHV project in Shagohuang area proposed by the present invention. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] Reference Figure 1 , a method for ecological restoration of ultra-high voltage engineering in Shagohuang area, comprising the following steps:

[0037] S1 Preventive Control Measures

[0038] First, ecological restoration technology should be incorporated into the soil and water conservation program report;

[0039] The second is red line control. Along the land acquisition red line of the earth pile area, a hard fence limit is set 5 meters inward. Before starting construction, the road from the exit to the earth pile area is planned, and colorful flag limits are set to control vehicle routes and the scope of earth occupation to avoid encroaching on land outside the red line.

[0040] In a preferred embodiment, the hard fence used in step S1 is a wire mesh fence, which is welded with 3-5mm thick low-carbon steel wire, with a mesh size of 50x150mm, and the mesh is bent to achieve both aesthetics and enhanced impact resistance. The pillars are trapezoidal columns with an upper side of 5cm and a lower side of 8cm, a 135-degree elbow on the top, and a 200x200mm flange welded at the bottom; finally, after the wire mesh fence is completed, it is hot-dip galvanized and electrostatically sprayed with high-quality polyester powder, and the spray color adopts the internationally popular RAL color.

[0041] By setting up hard fences, the ecological restoration area can be effectively isolated to prevent irrelevant personnel from entering and causing damage.

[0042] S2 Engineering Measures

[0043] (1) Land leveling

[0044] In a preferred embodiment, in step S2, due to the damage and occupation of land by the construction project, the original land morphology is changed, resulting in an uneven land surface, which is not conducive to subsequent land tillage and manual pre-embedding of grass grids. Therefore, land leveling is required, wherein land leveling mainly adopts mechanical trimming and backfilling of topsoil in the soil pile area, and controls the ground slope to not exceed 20 degrees.

[0045] By using mechanical trimming and backfilling of topsoil, the structural strength of the soil in the restoration area can be effectively guaranteed, laying a good foundation for ecological restoration.

[0046] (2) Land tillage

[0047] In a preferred embodiment, in step S2, the land needs to be plowed to meet the needs of later grassland recovery, break the compacted layer, loosen the soil, increase water permeability and air permeability, and improve the drought and waterlogging resistance of the land; the land is loosened mechanically with a loosening depth of not less than 30 cm.

[0048] By plowing the land, the soil can be effectively transported and the soil's water and air permeability can be increased.

[0049] S3 Biological measures

[0050] (1) Sowing grass seeds

[0051] The selection of suitable planting species is the key to ecological reconstruction. According to the geographical location of the project area and local climatic conditions, the soil pile area adopts the scheme of pre-buried grass grid sand barriers and mixed sowing of sweet clover, Inner Mongolia ice grass, foxtail grass and millet. Due to the water shortage at the project site, Zhongning Station has installed two sets of domestic sewage treatment devices in the temporary construction area.

[0052] In a preferred embodiment, in step S3, the ratio of sweet clover, Inner Mongolian wheat grass, foxtail grass and millet is 1:1:1:1, wherein the sowing amount of sweet clover, Inner Mongolian wheat grass and foxtail grass is 60kg / hm 2 , the sowing rate of millet is 38kg / hm 2 , and replanting is carried out at 20%, and the time for planting grass is generally chosen in the rainy season to improve survival.

[0053] By planting a mixture of sweet clover, Inner Mongolian wheatgrass, foxtail grass and millet, the most suitable planting plants for the soil in the restoration area can be determined.

[0054] In a preferred embodiment, in step S3, the rated capacity of the domestic sewage treatment device is 180m 3 / day, 60m 3 / day, with an average daily water output of 150m 3 The soil pile area is connected to the recycled water for irrigation.

[0055] By installing two domestic sewage treatment devices, the soil pile area can be fully irrigated to ensure the moisture required for vegetation growth.

[0056] (2) Apply organic fertilizer

[0057] In a preferred embodiment, in step S3, according to local reclamation experience, the area of ​​natural pasture for reclamation is restored to soil fertility by applying organic fertilizer, and the fertilization area is 4.8562hm 2 According to the "Supplementary Standards for Budget Quotas of Land Development and Reclamation Projects in Ningxia Hui Autonomous Region", the fertilizer standard is 4500kg / hm 2 .

[0058] By basing ourselves on local reclamation experience, we can apply fertilizers more accurately.

[0059] S4. Monitoring and protection measures, the protection area is 4.8562hm 2， The monitoring period starts from the sowing of grass seeds and ends when the water conservation acceptance is completed, with monitoring being conducted once a month.

[0060] In a preferred embodiment, in step S4, the monitoring content is mainly to monitor the ecological restoration effect, that is, to monitor the vegetation in terms of plant growth, height, coverage, grass production, etc., and to replant the poorly growing areas.

[0061] By replanting areas with poor growth, the ecological restoration of the soil pile area can be effectively achieved.

[0062] Among them, the ecological restoration method proposed in the present invention has the following engineering quantities for ecological restoration:

[0063] Land leveling = 4.8562hm 2

[0064] Land tillage = 4.8562hm 2

[0065] Sweet Clover Spread = 4.8562hm 2 (natural grassland)×60(1+20%)kg / hm 2 / 4=87kg

[0066] Spreading Inner Mongolian wheatgrass = 4.8562hm2 (natural grassland)×60(1+20%)kg / hm 2 / 4=87kg

[0067] Sowing foxtail grass = 4.8562hm 2 (natural grassland)×60(1+20%)kg / hm 2 / 4=87kg

[0068] Sowing millet = 4.8562hm 2 (Natural pasture) × 38 (1 + 20%) kg / hm 2 / 4 = 55kg soil fertilizer = 4.8562hm 2 ×4500kg / hm 2 =21853kg.

[0069] In summary, the ecological restoration method of the UHV project in the Shagohuang area proposed by the present invention focuses on the ecological restoration of the soil-pile area, and innovatively proposes and applies four major measures, namely, preventive control measures, engineering measures, biological measures, and monitoring and management measures, which can effectively achieve vegetation restoration in the Shagohuang area of ​​Ningxia, and provide reference for subsequent projects with similar land properties; at the same time, the present invention has opened up a vegetation restoration test field, which is divided into four areas. The grass seeds are selected from Inner Mongolia ice grass and Artemisia sphaerocephala, and the water sources are selected from recycled water and tap water, which are matched in pairs, for a total of four combinations. The experimental phenomenon is that the ice grass area grows well, and Artemisia sphaerocephala is planted once in May and replanted once in July, but it did not germinate. The test results show that there is no obvious difference in the maintenance effect of tap water or recycled water. The vegetation restoration result mainly depends on the grass seed variety. Ice grass is suitable for the ecological restoration of this area, while Artemisia sphaerocephala is not suitable. Therefore, the ecological restoration of the soil-pile area excludes Artemisia sphaerocephala recommended by the original special design for environmental water conservation.

[0070] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for ecological restoration of UHV engineering in Shagohuang area, characterized in that: The following steps are involved: S1 Preventive control measures: The first is to incorporate ecological restoration technology into the soil and water conservation plan report. The second is red line control. Along the land acquisition red line of the earth pile area, a hard fence limit is set 5 meters inward. Before starting construction, the road from the exit to the earth pile area is planned, and colorful flag limits are set to control vehicle routes and the scope of earth occupation to avoid encroaching on land outside the red line. S2 Engineering Measures: (1) Land leveling (2) Land tillage S3 Biological Measures: (1) Sowing grass seeds The selection of suitable planting species is the key to ecological reconstruction. According to the geographical location of the project area and the local climatic conditions, the soil pile area adopts the scheme of pre-buried grass grid sand barriers and mixed sowing of sweet clover, Inner Mongolian ice grass, foxtail grass and millet. Due to the shortage of water in the project area, Zhongning Station has set up two sets of domestic sewage treatment devices in the temporary construction area, and uses the reclaimed water generated by them to irrigate the soil pile area. (2) Apply organic fertilizer S4 monitoring and protection measures: The management area is 4.8562hm 2 The monitoring time starts from the sowing of grass seeds to the completion of water conservation acceptance, and monitoring is carried out once a month.

2. The method for ecological restoration of UHV engineering in Shagohuang area according to claim 1 is characterized in that: The hard fence used in step S1 is a wire mesh fence, which is welded with 3-5mm thick low-carbon steel wire, with a mesh size of 50x150mm, and the mesh is bent to achieve both aesthetics and enhanced impact resistance. The pillars are trapezoidal columns with an upper side of 5cm and a lower side of 8cm, a 135-degree elbow on the top, and a 200x200mm flange welded at the bottom; finally, after the wire mesh fence is manufactured, it is hot-dip galvanized and electrostatically sprayed with high-quality polyester powder, and the spray color adopts the internationally popular RAL color.

3. The ecological restoration method for the UHV project in Shagohuang area according to claim 1 is characterized in that: In step S2, due to the damage and occupation of land by the construction project, the original land morphology is changed, resulting in an uneven land surface, which is not conducive to subsequent land tillage and manual pre-embedding of grass grids. Therefore, land leveling is required, wherein land leveling mainly uses mechanical trimming and backfilling of topsoil in the soil pile area, and controls the ground slope to not exceed 20 degrees.

4. The method for ecological restoration of UHV engineering in Shagohuang area according to claim 1 is characterized in that: In step S2, when the land is plowed, after the topsoil is backfilled, it needs to be loosened to break the compacted layer, loosen the soil, increase the water permeability and air permeability, and improve the drought and waterlogging resistance of the land; the land is loosened mechanically, and the loosening depth is not less than 30 cm.

5. The method for ecological restoration of UHV engineering in Shagohuang area according to claim 1 is characterized in that: In step S3, the ratio of sweet clover, Inner Mongolian wheat grass, foxtail grass and millet is 1:1:1:1, and the sowing amount of sweet clover, Inner Mongolian wheat grass and foxtail grass is 60kg / hm 2 , the sowing rate of millet is 38kg / hm 2 , and replanting is carried out at 20%, and the time for planting grass is generally chosen in the rainy season to increase the survival rate.

6. The method for ecological restoration of UHV engineering in Shagohuang area according to claim 1 is characterized in that: In step S3, the rated capacity of the domestic sewage treatment device is 180m 3 / day, 60m 3 / day, with an average daily water output of 150m 3 The soil pile area is connected to the recycled water for irrigation.

7. The method for ecological restoration of UHV engineering in Shagohuang area according to claim 1 is characterized in that: In step S3, according to local reclamation experience, the area of ​​natural pasture for reclamation is restored to soil fertility by applying organic fertilizer, and the fertilization area is 4.8562hm 2 According to the "Supplementary Standards for Budget Quotas of Land Development and Reclamation Projects in Ningxia Hui Autonomous Region", the fertilizer standard is 4500kg / hm 2 .

8. The method for ecological restoration of UHV engineering in Shagohuang area according to claim 1 is characterized in that: In step S4, the monitoring content is mainly to monitor the ecological restoration effect, that is, to monitor the vegetation from the perspective of plant growth, height, coverage, grass production, etc., and to replant the poorly growing areas.

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