Slope grass planting method

Abstract

The invention discloses a side slope grass planting method which comprises the following steps: S1, after laying soil on the surface of a side slope base body, covering a slope surface soil layer with grass planting balls to form a grass planting ball layer; s2, a plant fiber net is laid on the surface of the grass planting ball layer, anchor rods are installed so that the plant fiber net can be fixed to the slope surface, sufficient water is poured, and side slope grass planting is completed; the grass planting ball layer is divided into an upper layer structure, a middle layer structure and a lower layer structure from the longitudinal section, and the grain sizes of grass planting balls of the grass planting ball layer from the upper layer to the middle layer to the lower layer are gradually reduced to form the multi-layer hole structure grass planting ball layer. The grass planting ball comprises the following components in percentage by mass: 70%-80% of neutral regenerated micro powder, 1%-3% of plant fibers, 20%-30% of nutrient soil, 0.1%-1% of vegetation seeds, 1%-2% of dextrin powder and the balance of water. The neutral grass planting ball layer has good grain composition and porosity, the problem of soil fixation can be solved, plant growth is facilitated, the greening requirement is met, and construction is easy and convenient.

Description

Technical Field

[0001] The invention relates to the technical field of green ecology and slope greening, and more specifically, to a slope grass planting method. Background Art

[0002] The specific implementation forms of slope protection include plant-type slope protection, ecological bag slope protection, porous structure slope protection, etc. Among them, the ecological bag slope protection has the problem of easy aging, and under the scouring of water flow, it may affect the stability of the slope due to uneven settlement; the porous structure slope protection has the problem of high cost and low vegetation coverage; the plant-type slope protection has limited ability to resist water flow and wind and wave scouring. When the slope protection is tilted at a large angle, rainwater flows down the slope, and the plants are easily scoured by rainwater to form deep grooves in the early stage of growth.

[0003] Slope protection and greening refers to planting plants on the surface of the slope base after the slope has been leveled. The plant roots are used to fix the soil to protect the slope, prevent water erosion and soil erosion caused by water erosion, and thus meet the requirements for slope surface stability while restoring the damaged natural ecological environment. It is an effective means of slope protection.

[0004] At present, the research and application of ecological greening are developing rapidly. The main technologies include spraying, bag filling, grouting, paving, etc. First, a soil environment is created on the exposed slope surface, and then artificial sowing, mechanical spraying, and direct planting are used to finally achieve vegetation coverage on the slope surface. Taking spraying as an example, the soil is mixed with fiber, peat soil, water retaining agent, adhesive, fertilizer and plant seeds, and then mechanically sprayed onto the slope surface to form "guest soil", which plays a positive role in environmental governance. However, there are also many problems, mainly in the following aspects: 1. The overall slope protection environment is not conducive to plant growth. Most of the adhesives are cement with high alkalinity; 2. The lawn planted in the early stage of growth is also easily washed away and cannot meet the requirements of water and soil conservation. For example, patent CN115053784A discloses a spraying material and a method of using the same, in which a concrete spraying matrix is ​​obtained by mixing sand, cement, soil, fiber and water, and a layer of soil seed matrix is ​​sprayed on the concrete matrix with a thickness of 1 cm to 3 cm. However, the soil seed layer is easily washed away by storms and rainstorms, causing soil and water loss; patent CN107963838A discloses an ecological spray-anchor slope protection method, in which a greening surface layer composed of cement-enhanced alkaline-modified composite planting soil and seeds is sprayed. Although the surface layer is very stable, cement is used as a binder, and the high alkalinity is not conducive to plant growth. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned defects of the prior art and provide a method for planting grass on a slope, by setting a grass planting ball layer composed of multiple layers with different particle sizes and different porosities, and the particle size of the grass planting balls is prepared from small to large along the depth direction, so that the grass planting ball layer has a good particle grading, which provides a channel for the circulation of water, reduces soil loss and improves the survival rate of vegetation; in addition, the porosity of the grass planting balls directly affects the growth space and growth path of the plants, plays an important role in the living environment of the plants, the root growth distribution, etc., and the grass planting balls are neutral and will not inhibit the growth of plants. It is a feasible way to solve the problem of soil fixation, is beneficial to plant growth, meets the greening requirements, and is simple to construct. It is easy to construct, is conducive to production flow and scale, can be widely used in slope management, and solves the key technical problems encountered in slope protection and grass planting in actual engineering.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] A slope grass planting method comprises the following steps:

[0008] S1. After laying soil on the surface of the slope base, cover the grass balls to the slope soil layer to form a grass ball layer;

[0009] S2, laying a plant fiber net on the surface of the grass ball layer, installing anchor rods to fix the plant fiber net on the slope surface, and watering it to complete the slope grass planting;

[0010] The grass ball layer is divided into an upper, middle and lower three-layer structure from a longitudinal cross section, and the particle size of the grass balls in the grass ball layer gradually decreases from the upper layer to the middle layer to the lower layer to form a multi-layer porous structure grass ball layer;

[0011] The grass ball comprises the following components in percentage by mass: 70% to 80% of neutral regenerated micro powder, 1% to 3% of plant fiber, 20% to 30% of nutrient soil, 0.1% to 1% of vegetation seeds, 1% to 2% of dextrin powder and the balance is water.

[0012] Implementing the embodiments of the present invention will have the following beneficial effects:

[0013] (1) The present invention uses recycled micropowder as the main raw material to prepare grass planting balls, which is beneficial to the resource utilization of recycled micropowder. The neutralization process of recycled micropowder absorbs carbon dioxide. On the one hand, it creates a suitable vegetation growth environment and promotes the rapid growth of plants. On the other hand, the carbonization reaction is beneficial to waste carbon fixation, energy conservation and emission reduction. The preparation process is simple and the cost is low. At the same time, the grass planting balls based on neutral recycled micropowder have a significant carbon fixation effect, which is beneficial to reducing carbon emissions.

[0014] (2) The present invention provides a grass ball layer composed of a multi-layer porous structure, and fills it with grass balls of different particle sizes. The particle sizes of the grass balls are prepared from large to small along the depth direction, so that the grass ball layer has good particle grading. The spherical surfaces of the spherical particles constitute the pores between the particles. The pores are three-dimensionally staggered to form a coherent water transfer channel, which provides a channel for water circulation, can effectively slow down the erosion of rainwater, reduce soil loss and improve the survival rate of vegetation. The grass balls are neutral and will not inhibit the growth of plants. They are a feasible way to solve the problem of soil fixation, facilitate plant growth, meet greening requirements, and are simple to construct.

[0015] (3) The present invention adopts a spreading or backfilling method to form a grass ball layer which can be used to provide seeds and nutrients and cover the exposed soil layer; the plant fiber mesh layer fixes and protects the grass ball layer to prevent the grass balls from rolling down due to storms. This structure forms a green plant protection net on the surface of the slope, protecting the slope structure in an ecological and green way.

[0016] (4) The slope grass planting method of the present invention combines new materials, and the grass planting ball components cooperate with each other. The regenerated micropowder has a porous structure and controllable pores, so that the prepared grass planting ball has excellent water retention and water permeability. The nutrient soil can provide nutrients for plant seeds, and cooperate with the cross-linked plant fibers to play a breathable function, and together provide a suitable growth environment for the growth of plant seeds. The grass planting ball is sown according to the conventional sowing steps, and has good anti-scouring ability. The plant seeds can germinate and grow within 5-10 days. The plant seeds have a high survival rate and strong versatility. In the present invention, dextrin powder is used as a binder, which dissolves in water. The germinated grass seeds can easily break through the grass planting ball. The broken grass planting ball is equivalent to covering the soil with a layer of nutrient insulation slag, which helps vegetation grow better. It can effectively overcome the shortcomings of the commonly used ecological slope protection form, realize the coordinated adaptation of new materials and planting methods, and is easy to construct. It is conducive to production flow and scale, and can be widely used in slope management, solving the key technical problems encountered in slope protection and grass planting in actual engineering. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of slope grass planting according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with specific embodiments, but the present invention is not limited in any way.

[0019] The present invention discloses a slope grass planting method, such as Figure 1 As shown, the following steps are included:

[0020] S1. After laying soil on the surface of the slope base 1, the grass planting balls are covered to the slope soil layer 2 to form a grass planting ball layer 3.

[0021] S2, laying a plant fiber net 4 on the surface of the grass ball layer 3, installing anchor rods 5 to fix the plant fiber net 4 on the slope surface, and watering it sufficiently to complete the slope grass planting.

[0022] Specifically, the present invention lays a layer of grass ball layer 3 with particle grading on the slope soil layer 2, so that in the early growth stage when the vegetation has not yet played a protective role, less soil is exposed, which can not only effectively slow down the scouring of rainwater and reduce soil loss, but also improve the survival rate of vegetation and will not inhibit plant growth. A layer of plant fiber net 4 is laid on the grass ball, which can not only fix the grass ball so that it will not roll off the slope due to strong winds or heavy rains, but also fix the grass roots during the grass growth cycle. The plant fiber net 4 can be degraded and absorbed by the vegetation after a certain period. The anchor rod 5 can effectively fix the plant fiber net 4. When in use, the anchor rod 5 is nailed into the slope soil layer 2, and the lawn roots in the grass ball pass through the surface slope soil layer 2 to contact the substrate and take root, which can prevent the lawn from being washed away by rain impact.

[0023] Furthermore, the grass ball layer 3 is divided into an upper, middle and lower three-layer structure from a longitudinal cross section, and the grass ball particle size of the grass ball layer 3 gradually decreases from the upper layer to the middle layer to the lower layer to form a multi-layer porous structure grass ball layer 3.

[0024] Furthermore, the grass ball includes the following components in percentage by mass: 70% to 80% of neutral regenerated micropowder, 1% to 3% of plant fiber, 20% to 30% of nutrient soil, 0.1% to 1% of vegetation seeds, 1% to 2% of dextrin powder and the remainder is water.

[0025] Specifically, the functions and synergistic effects of each component in the present invention are as follows: The present invention first utilizes the carbonizable property of the regenerated micropowder, which becomes neutral after carbonization. On the one hand, it creates a suitable vegetation growth environment to promote rapid plant growth. On the other hand, the carbonization reaction is beneficial to waste carbon fixation, energy conservation and emission reduction. The preparation process is simple and the cost is low. At the same time, the grass planting balls based on neutral regenerated micropowder have a significant carbon fixation effect, which is beneficial to reduce carbon emissions. Secondly, the porous structure and controllable pores of the regenerated micropowder are utilized, so that the prepared grass planting balls have excellent water retention and water permeability. Furthermore, the nutrient soil can provide nutrients for plant seeds, cooperate with the cross-linked plant fibers to play a breathable function, and jointly provide a suitable growth environment for the growth of plant seeds. At the same time, it has good anti-scouring ability. Plant seeds can germinate and grow within 5 to 10 days. The survival rate of plant seeds is high and the versatility is strong. Furthermore, the use of dextrin powder as a binder in the present invention can promote the agglomeration of soil particles, increase the number of soil aggregates, improve soil water retention and biological activity, and dissolve in water. Germinated grass seeds can easily break through the grass balls, and the broken grass balls are equivalent to covering the soil with a layer of nutrient insulation slag, which helps vegetation grow better. Therefore, neutral regenerated micropowder, plant fiber, nutrient soil, vegetation seeds and dextrin powder have a synergistic effect, play a role in water retention and water permeability, and at the same time enhance the ability to resist scours, improve plant rooting, germination and growth rate, and the porous structure of the grass ball can also provide oxygen for plant roots to breathe, preventing root rot and plant death when there is too much external moisture.

[0026] In a specific embodiment, the mesh size of the plant fiber net 4 is 10 mm×10 mm to 20 mm×20 mm.

[0027] In a specific embodiment, the number of anchor rods 5 installed is 4 per square meter, and they are fixed around the plant fiber net 4 .

[0028] In a specific embodiment, the total thickness of the grass ball layer 3 is 2 cm to 4 cm.

[0029] In a specific embodiment, the particle size of the grass planting ball is 5 mm to 30 mm.

[0030] In a specific embodiment, the porosity of the grass ball is 15% to 30%.

[0031] Specifically, the present invention arranges a grass ball layer 3 composed of a multi-layer porous structure, and fills it with grass balls containing different particle sizes and different porosities. The particle size of the grass balls is prepared from large to small along the depth direction, so that the grass ball layer 3 has good particle grading, and the spherical surfaces of the spherical particles constitute the pores between the particles. The pores are three-dimensionally staggered to form a coherent water transfer channel, which provides a channel for water circulation, can effectively slow down the erosion of rainwater, reduce soil loss and improve the survival rate of vegetation; and the grass balls are neutral and will not inhibit the growth of plants. It is a feasible way to solve the problem of soil fixation, is beneficial to plant growth, meets greening requirements, and is simple to construct.

[0032] In a specific embodiment, the particle size of the neutral regenerated micro powder is 1 um to 300 um.

[0033] In a specific embodiment, the neutral regenerated micro powder of the present invention is divided into the following three particle sizes: first particle size: 1-100um; second particle size: 100-200um; third particle size: 200-300um. The regenerated micro powder of each particle size is used to prepare grass planting balls, and different porosities can be obtained. The mixing mass ratio of the first particle size, the second particle size and the third particle size is (0-10):(0-10):(0-10).

[0034] In a specific embodiment, the grass planting balls of the present invention are divided into the following three particle sizes: first particle size: 5-10mm; second particle size: 10-20mm; third particle size: 20-30mm. The grass planting balls of each particle size are evenly spread on the slope to form a three-layer structure of lower, middle and upper layers.

[0035] Specifically, the porosity of the grass planting ball directly affects the growth space and growth path of the plant, and plays an important role in the plant's living environment, root growth distribution, etc. Based on this, the present invention comprehensively considers the mesoscopic structural characteristics of the regenerated micropowder, such as the pore structure, porosity, and number of pores, and the physiological growth characteristic parameters of the vegetation, and reasonably grades the neutral regenerated micropowder of multiple particle sizes to regulate the porosity of the grass planting ball, which helps to provide scientific and good growth space and growth conditions for the growth of plant roots, thereby improving the growth vitality and coverage of the plants.

[0036] In a specific embodiment, the length of the plant fiber is 0.1 mm to 2.0 mm.

[0037] In a specific embodiment, the nutrient soil is acid fertilizer powder with a particle size of ≤150um;

[0038] In a specific embodiment, the vegetation seeds include one or more of Bermuda grass, tall fescue, ryegrass, red fescue and bluegrass.

[0039] In a specific embodiment, the method for preparing the grass ball comprises the following steps:

[0040] S1. Carbon dioxide is introduced into waste concrete powder with a pH of 12.6 for carbonization to obtain neutral regenerated micro powder with a pH of 8.6.

[0041] Specifically, the neutral regenerated micropowder is prepared by introducing carbon dioxide into alkaline initial regenerated micropowder for carbonization.

[0042] In a specific embodiment, the carbonization conditions in step S1 are: carbon dioxide concentration of 20% to 99%, carbonization pressure of 0.1 MPa to 0.3 MPa, carbonization temperature of 15° C. to 25° C., and carbonization time of 8 h to 12 h.

[0043] In a specific embodiment, the carbonization conditions in step S1 may also be: carbon dioxide concentration of 20% to 25%, humidity of 65% to 75%, carbonization temperature of 15° C. to 25° C., and carbonization time of 3 to 7 days.

[0044] S2. Mixing the neutral regenerated micro powder with plant fiber, nutrient soil, vegetation seeds and dextrin powder to obtain a mixed powder.

[0045] S3, spraying water on the mixed powder to form granules, and consolidating and drying the mixed powder to obtain a grass planting ball.

[0046] In a specific embodiment, the mixing ratio of the mixed powder to water is 1:(0.25-0.3).

[0047] In a specific embodiment, the temperature of the consolidation and drying is 30°C to 40°C.

[0048] Specifically, the present invention realizes the coordinated adaptation of new materials and planting methods, can be easily constructed, is conducive to streamlined and large-scale production, can be widely used in slope management, and solves the key technical problems encountered in slope protection and grass planting in actual engineering.

[0049] The following are specific embodiments

[0050] Example 1

[0051] A slope grass planting method of this embodiment includes the following steps:

[0052] S1. After laying soil on the surface of the slope base, cover the grass balls to the slope soil layer to form a grass ball layer.

[0053] S2. Lay a plant fiber net (10mm×10mm) on the surface of the grass ball layer and install anchor rods to fix the plant fiber net on the slope. The number of anchor rods installed is 4 per square meter. They are fixed around the plant fiber net and watered to complete the slope grass planting. Among them:

[0054] The total thickness of the grass ball layer is 4 cm, and the grass ball layer is divided into three layers of upper, middle and lower structures from the longitudinal section.

[0055] The grass ball includes the following components in mass percentage: 80% neutral regenerated micro powder, 1% plant fiber with a length of 0.5 mm, 16% nutrient powder, 1% tall fescue, 2% dextrin powder and the balance is water; the neutral regenerated micro powder is divided into the following three particle sizes: the first particle size: 1-100um; the second particle size: 100-200um; the third particle size: 200-300um. The mixing mass ratio of the first particle size, the second particle size and the third particle size is 8:1:1.

[0056] The preparation method of the grass ball comprises the following steps:

[0057] S1. Carbon dioxide is introduced into waste concrete powder with a pH of 12.6 for carbonization to obtain neutral regenerated micro powder with a pH of 8.6. The carbonization conditions are: carbon dioxide concentration of 99%, carbonization pressure of 0.3 MPa, carbonization temperature of 18°C ​​to 22°C, and carbonization time of 8 hours.

[0058] S2. Mixing the neutral regenerated micro powder with plant fiber, nutrient soil, vegetation seeds and dextrin powder to obtain a mixed powder.

[0059] S3. The mixed powder is granulated by spraying water, the mixing ratio of the mixed powder to water is 1:0.3, and the mixed powder is placed in a ventilated environment indoors until solidified and dried at low temperature in a drying furnace at 40°C to obtain a grass ball.

[0060] Example 2

[0061] A slope grass planting method of this embodiment includes the following steps:

[0062] S1. After laying soil on the surface of the slope base, cover the grass balls to the slope soil layer to form a grass ball layer.

[0063] S2. Lay a plant fiber net (10mm×10mm) on the surface of the grass ball layer, and install anchor rods to fix the plant fiber net on the slope. The number of anchor rods installed is 4 per square meter. Fix them around the plant fiber net, water them sufficiently, and complete the slope grass planting.

[0064] The total thickness of the grass ball layer is 4 cm, and the grass ball layer is divided into three layers of upper, middle and lower structures from the longitudinal section.

[0065] The grass ball includes the following components in mass percentage: 76% neutral regenerated micro powder, 1% plant fiber with a length of 0.5 mm, 20% nutrient powder, 1% tall fescue, 2% dextrin powder and the balance is water. The neutral regenerated micro powder is divided into the following three particle sizes: first particle size: 1-100um; second particle size: 100-200um; third particle size 200-300um, and the mixing mass ratio of the first particle size, the second particle size and the third particle size is 2:7:1.

[0066] The preparation method of the grass ball comprises the following steps:

[0067] S1. Carbon dioxide is introduced into waste concrete powder with a pH of 12.6 for carbonization to obtain neutral regenerated micro powder with a pH of 8.6. The carbonization conditions are: carbon dioxide concentration of 99%, carbonization pressure of 0.3 MPa, carbonization temperature of 18°C ​​to 22°C, and carbonization time of 8 hours.

[0068] S2. Mixing the neutral regenerated micro powder with plant fiber, nutrient soil, vegetation seeds and dextrin powder to obtain a mixed powder.

[0069] S3. The mixed powder is granulated by spraying water, the mixing ratio of the mixed powder to water is 1:0.3, and the mixed powder is placed in a ventilated environment indoors until solidified and dried at low temperature in a drying furnace at 40°C to obtain a grass ball.

[0070] Example 3

[0071] A slope grass planting method of this embodiment includes the following steps:

[0072] S1. After laying soil on the surface of the slope base, cover the grass balls to the slope soil layer to form a grass ball layer.

[0073] S2. Lay a plant fiber net (10mm×10mm) on the surface of the grass ball layer, and install anchor rods to fix the plant fiber net on the slope. The number of anchor rods installed is 4 per square meter. Fix them around the plant fiber net, water them sufficiently, and complete the slope grass planting.

[0074] The total thickness of the grass ball layer is 4 cm, and the grass ball layer is divided into three layers of upper, middle and lower structures from the longitudinal section.

[0075] The grass ball includes the following components in mass percentage: 71% neutral regenerated micro powder, 1% plant fiber with a length of 0.5 mm, 25% nutrient powder, 1% tall fescue, 2% dextrin powder and the balance is water. The neutral regenerated micro powder is divided into the following three particle sizes: first particle size: 1-100um; second particle size: 100-200um; third particle size: 200-300um. The mixing mass ratio of the first particle size, the second particle size and the third particle size is 1:2:7.

[0076] The preparation method of the grass ball comprises the following steps:

[0077] S1. Carbon dioxide is introduced into waste concrete powder with a pH of 12.6 for carbonization to obtain neutral regenerated micro powder with a pH of 8.6. The carbonization conditions are: carbon dioxide concentration of 99%, carbonization pressure of 0.3 MPa, carbonization temperature of 18°C ​​to 22°C, and carbonization time of 8 hours.

[0078] S2. Mixing the neutral regenerated micro powder with plant fiber, nutrient soil, vegetation seeds and dextrin powder to obtain a mixed powder.

[0079] S3. The mixed powder is granulated by spraying water, the mixing ratio of the mixed powder to water is 1:0.3, and the mixed powder is placed in a ventilated environment indoors until solidified and dried at low temperature in a drying furnace at 40°C to obtain a grass ball.

[0080] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for planting grass on a slope, characterized in that: The following steps are involved: S1. After laying soil on the surface of the slope base, cover the grass balls to the slope soil layer to form a grass ball layer; S2, laying a plant fiber net on the surface of the grass ball layer, installing anchor rods to fix the plant fiber net on the slope surface, and watering it to complete the slope grass planting; The grass ball layer is divided into an upper, middle and lower three-layer structure from a longitudinal cross section, and the particle size of the grass balls in the grass ball layer gradually decreases from the upper layer to the middle layer to the lower layer to form a multi-layer porous structure grass ball layer; The grass ball comprises the following components in percentage by mass: 70% to 80% of neutral regenerated micro powder, 1% to 3% of plant fiber, 20% to 30% of nutrient soil, 0.1% to 1% of vegetation seeds, 1% to 2% of dextrin powder and the balance is water.

2. The slope grass planting method according to claim 1, characterized in that: The total thickness of the grass ball layer is 2 cm to 4 cm.

3. The slope grass planting method according to claim 2, characterized in that: The particle size of the grass planting ball is 5mm to 30mm; The porosity of the grass planting ball is 15% to 30%.

4. The slope grass planting method according to claim 1, characterized in that: The particle size of the neutral regenerated micro powder is 1 um to 300 um.

5. The slope grass planting method according to claim 1, characterized in that: The length of the plant fiber is 0.1 mm to 2.0 mm; The nutrient soil is acid fertilizer powder with a particle size of ≤150um; The vegetation seeds include one or more than two of bermudagrass, tall fescue, ryegrass, red fescue and bluegrass.

6. The slope grass planting method according to claim 1, characterized in that: The method for preparing the grass ball comprises the following steps: S1, introducing carbon dioxide into waste concrete powder with a pH of 12.6 for carbonization to obtain neutral regenerated micro powder with a pH of 8.6; S2, mixing the neutral regenerated micropowder with plant fiber, nutrient soil, vegetation seeds and dextrin powder to obtain a mixed powder; S3, granulating the mixed powder by water spraying, and consolidating and drying to obtain the grass planting ball.

7. The slope grass planting method according to claim 7, characterized in that: In step S3, the mixing ratio of the mixed powder to water is 1:(0.25-0.3).

8. The slope grass planting method according to claim 1, characterized in that: The mesh size of the plant fiber net is 10mm×10mm to 20mm×20mm.

9. The slope grass planting method according to claim 1, characterized in that: The number of anchor rods installed is 4 per square meter, and they are fixed around the plant fiber net.

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