Method for planting vegetation on high and steep rock slope

Abstract

The invention relates to a high and steep rock slope vegetation planting method, which comprises the step of constructing a slope protection structure on a high and steep rock, the device comprises a plurality of roughening grooves formed in the slope surface of the high and steep rock slope, a protection net is laid on the slope surface of the high and steep rock slope, and a reinforcing assembly is arranged between the protection net and an inner cavity of each roughening groove. The roughening groove can be formed in the slope surface of the high and steep rock slope through a machine, the slope surface is subjected to roughening treatment, then the protective net is laid on the slope surface of the high and steep rock slope, corners of the protective net are fixed through the anti-falling fixing piles, then the protective net is fixed to an inner cavity of the roughening groove through the reinforcing assembly, and the protective net is fixed to the slope surface of the high and steep rock slope through the reinforcing assembly. And the vegetation base material is sprayed on the slope surface, so that the vegetation base material is not easily separated from the inner cavity of the roughening groove, vegetation can be planted on the high and steep rock slope, and the purpose of full-slope-ratio vegetation greening construction is achieved.

Description

Technical Field

[0001] The present application belongs to the technical field of slope ecological protection and slope vegetation restoration, and in particular, relates to a method for planting vegetation on high and steep rock slopes. Background Art

[0002] For the restoration of vegetation on steep rock slopes, the current main technologies used are vegetation bag masonry, three-dimensional net vegetation spraying technology, frame protection technology, and vegetation concrete technology. These technologies use different technical means to fix soil, organic matter and other vegetation materials on the slope surface, create a plant growth environment, and carry out vegetation restoration on rock slopes. The vegetation bag technology places vegetation bags containing plant seeds and growth substrates on the slope layer by layer in a tight code. In the early stage, the vegetation bags are used to stabilize the soil and prevent slope soil erosion. After completion, the soil fixing function of plant roots is brought into play. However, this technology needs to comprehensively consider the stability of the slope after the construction of the vegetation bags and the stability of the vegetation bags themselves.

[0003] The three-dimensional net is a three-dimensional space frame with a grid structure made of high-strength polymer or synthetic fiber material, fixed on the slope to reinforce the soil. Common frame protection types include arched frames, frame beams, mortar-laid stone frame protection, etc., which are generally not used alone, but are often used in conjunction with measures such as planting turf, vegetation bags, and soil spraying.

[0004] Common frame protection types include arch frames, frame beams, mortar-laid stone frame protection, etc., which are generally not used alone and are often combined with measures such as planting turf, vegetation bags, and soil spraying. This measure is expensive, difficult to construct, and has a long construction period. It is often used for high and steep slopes with poor shallow stability. The stabilizing effect is stronger than the greening effect, and there is often excessive protection, which is not suitable for high and steep rock slopes with stable rock strata.

[0005] Vegetation concrete, also known as vegetation concrete, is a technology that improves soil strength and anti-scouring properties by mixing cement with soil, while also achieving vegetation construction. This technology can significantly improve the anti-scouring ability of the spraying layer compared to traditional soil spraying technology, and can fix the slope spray-mixed substrate to achieve greening plant construction. However, these technologies are mostly used on gentle slopes with a ratio of less than 1:0.75, and are rarely used on slopes with a ratio of more than 1:0.5. For high and steep rock slopes, active protection nets are often hung and vines are planted at the foot of the slope, with the help of climbing vines to achieve greening of the slope surface.

[0006] A study took jute vegetation bags as an example. On a slope with a slope height of 8m and a slope angle of 1:1.15, the vegetation bags were in an unstable state and required additional engineering measures to increase stability. The stability coefficient of the three-dimensional net technology decreased nonlinearly on a slope with a slope angle of 1:1.5 as the thickness of the protective structure layer increased. When the thickness was 16cm, the stability coefficient reached a critical value of 1. It is not suitable for thicker soil layers. Through simulated rainfall tests, it was found that the sliding force of the three-dimensional net flexible protective structure under rainfall conditions increased, the anti-sliding force decreased, and the stability of the protective structure was significantly reduced. Moreover, under the same protective structure design parameters, the stability of the protective structure decreased as the slope inclination increased. When applied to high and steep rock slopes, its stability should be carefully considered.

[0007] Therefore, how to break the limitation that slopes above 1:0.75 are difficult to green, realize slope protection and slope greening construction on steep rock slopes, and achieve rapid vegetation recovery on steep rock slopes is an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0008] In order to solve the above technical problems, the high and steep rock slopes were roughened mechanically, the micro-topography of the slopes was created by superimposing vegetation sticks, and the vegetation substrate was fixed on the slopes using the dry spraying process. A systematic vegetation construction technology suitable for high and steep rock slopes with different slope ratios was proposed, breaking the limitation that high and steep rock slopes with slope ratios above 1:0.75 are difficult to green, and vegetation greening construction of all slope ratios can be achieved.

[0009] A high-steep rock slope protection structure provided in the present application adopts the following technical scheme: a high-steep rock slope protection structure, comprising a plurality of roughening grooves opened on the slope surface of the high-steep rock slope, a protective net is laid on the slope surface of the high-steep rock slope, a reinforcement component is arranged between the protective net and the inner cavity of the roughening groove, the reinforcement component comprises a U-shaped steel sleeve mounted on the surface of the protective net, both ends of the U-shaped steel sleeve are fixedly connected with piercing cones, and an anti-slip steel bar frame is installed on the outer side of the U-shaped steel sleeve.

[0010] By adopting the above technical scheme, a roughening groove is opened on the slope surface of the high and steep rock slope by machinery, the slope surface is roughened, and then the protective net is laid on the slope surface of the high and steep rock slope, and the corners of the protective net are fixed by anti-detachment fixing piles, and then the protective net is fixed to the inner cavity of the roughening groove by reinforcement components, and then the vegetation substrate is sprayed onto the slope surface, so that the vegetation substrate is not easy to separate from the inner cavity of the roughening groove, and vegetation can be planted on the high and steep rock slope, achieving the purpose of full-slope vegetation greening construction.

[0011] Preferably, anti-slip fixing piles are provided between the corners of the protective net and the steep rock slope, the anti-slip fixing piles are installed on the inclined surface of the steep rock slope by a pile driver, and the surface of the protective net is sleeved on the surface of the anti-slip fixing piles.

[0012] Preferably, a plurality of anti-slip barbs are welded on the surface of the piercing cone.

[0013] By adopting the above technical solution and setting the anti-detachment barbs, it can be ensured that after the piercing cone enters the inner wall of the roughening groove, the piercing cone will not easily detach from the inner wall of the roughening groove, thereby improving the reliability of the fixing of the protective net.

[0014] Preferably, a connecting gasket is welded to the middle of the inner side of the anti-slip steel bar frame, a threaded column is welded to the surface of the U-shaped steel sleeve, the connecting gasket is sleeved on the surface of the threaded column, and a nut is threadedly connected to the surface of the threaded column.

[0015] Preferably, a limit strip is welded on the top of the inner cavity of the connecting gasket, and limit grooves for the limit strip to slide are provided on both sides of the surface of the threaded column.

[0016] By adopting the above technical solution, through the coordinated use of the limit strip and the limit groove, after the connecting gasket is sleeved on the surface of the threaded column, the limit strip enters the inner cavity of the limit groove, which can limit the rotation of the connecting gasket and the anti-slip steel bar frame and ensure the stability of the anti-slip steel bar frame.

[0017] By adopting the above technical solution, through the coordinated use of the limit strip and the limit groove, after the connecting gasket is sleeved on the surface of the threaded column, the limit strip enters the inner cavity of the limit groove, which can limit the rotation of the connecting gasket and the anti-detachment fixed pile frame, thereby ensuring the stability of the slope vegetation environment.

[0018] At the same time, the present application also provides a method for planting vegetation on the high and steep rock slope using the high and steep rock slope protection structure, comprising the following steps:

[0019] (1) When excavating a stable high and steep rock slope, on the premise of ensuring the slope ratio, use rock drilling machinery to process the slope horizontally so that the undulating texture of the slope is cleared to present horizontal stripes. The height difference of the texture should be within 10 cm, and the raised part can be in the form of a 10 cm wide strip.

[0020] (2) According to the above structure, a protective net is laid on the slope of the steep rock slope, a reinforcement component is arranged between the protective net and the inner cavity of the roughening trough, and anti-slip fixed piles are arranged between the corners of the protective net and the steep rock slope. The anti-slip fixed piles are mechanically penetrated into the rock layer or soil layer and anchored on the steep rock slope, and the protective net is fixed on the anti-slip fixed piles;

[0021] (3) The slope surface is flat, and the fine pumice on the surface is cleaned with water. For slopes with a slope ratio of less than 1:0.75 (the slope ratio is the ratio of the vertical height to the horizontal width of the slope surface), the vegetation substrate and plant seeds are directly mixed and sprayed on the slope surface, with a spraying thickness of 10-12 cm. The vegetation substrate includes the following components in parts by weight: 8-10 parts of cement, 4-6 parts of ecological agent, 2-3 parts of fly ash, 1-2 parts of sodium carboxymethyl cellulose powder, 2-4 parts of sugarcane bagasse fiber (3-5 cm long filaments), and 100 parts of sandy loam; the ecological agent is a commonly used microbial agent, preferably an agent or fertilizer containing phosphate-solubilizing bacteria;

[0022] The sowing amount of plant seeds is calculated according to formula (1):

[0023] W=G×Q / (1000×T×C×D×P×R) (1)

[0024] W---plant seed sowing amount, g / m 2 ;

[0025] G---desired plant density, plants / m 2 ;

[0026] Q---1000-grain weight of seeds, g;

[0027] T---Correction rate of the thickness of the matrix layer containing the seed layer. The correction rate of the thickness of the matrix layer containing the seed is 2cm-3cm, and the correction rate of the thickness of the matrix layer containing the seed is greater than 3cm. 0.8,

[0028] C---site condition correction rate, the correction rate for slope ratio less than 1:0.75 is 0.9, the correction rate for slope ratio between 1:0.75-1:0.5 is 0.8, and the correction rate for slope ratio greater than 1:0.5 is 0.7;

[0029] D---Correction rate during construction period. The correction rate during the non-plant growing season is 0.8, and the correction rate during the plant growing season is 1;

[0030] P---seed purity, %;

[0031] R---seed germination rate, %.

[0032] For slopes with a slope ratio greater than 1:0.75, first drive anchor rods to tie up planting rods. The planting rods are filled with 100 parts of sandy loam, 3-4 parts of rice husks, 5-6 parts of 8mm humic acid granular fertilizer, 3-5 parts of slow-release urea, 1-2 parts of sodium carboxymethyl cellulose powder, and 3-5 parts of nitrogen, phosphorus and potassium compound fertilizer granules, which are composed by weight. The nitrogen, phosphorus and potassium compound fertilizer granules are universal compound fertilizers, that is, nitrogen, phosphorus and potassium: 15-15-15; the longitudinal spacing of the planting rods with a slope ratio less than 1:0.3 is 0.8-1.2m, and the longitudinal spacing of the planting rods with a slope ratio of more than 1:0.3 is 0.6-0.8m. Then, tie a protective net (preferably a galvanized three-dimensional net) on the anchor rod for fixation, and use a reinforcement component to make the protective net fit within 5cm of the slope surface. The vegetation substrate is reinforced, and then the first layer of the vegetation substrate is sprayed by dry spraying technology, with a spraying thickness of 8-10 cm, wherein the vegetation substrate comprises the following components in weight proportion: 10-12 parts of cement, 4-6 parts of bagasse fiber (3-5 cm long filaments), 3-4 parts of fly ash, 5-7 parts of ecological agent, 3-4 parts of sodium carboxymethyl cellulose powder, and 100 parts of sandy loam, wherein the ecological agent is a commonly used microbial agent, preferably an agent or fertilizer containing phosphate-solubilizing bacteria; and then a second layer is sprayed thereon, that is, the first layer of the vegetation substrate is mixed with plant seeds and then sprayed onto the slope surface to form a matrix layer containing a seed layer, with a spraying thickness of 2-3 cm; after spraying the second layer of the vegetation substrate, the substrate is covered in time; the sowing amount of plant seeds is calculated according to formula (1).

[0033] Preferably, the roughening treatment is to use a rock drilling machine to perform transverse slope treatment when excavating a stable high and steep rock slope, while ensuring the slope ratio, so that the undulating texture of the cleaned slope presents transverse stripes, the height difference of the texture concave or convex is preferably within 10cm, and the convex part is in the form of a strip with a width of 10cm; inner grooves with an interval of 2cm can also be provided inside the grooves, and the depth of the inner grooves is 2-3cm.

[0034] Beneficial effects of this application:

[0035] 1. The present invention mechanically opens a roughening pit on the slope of a high and steep rock slope, roughens the slope, then lays a protective net on the slope of the high and steep rock slope, fixes the corners of the protective net by anti-slipping fixing piles, then reinforces the protective net by using a reinforcement assembly, and then fixes the vegetation substrate by a dry spraying process, so that the vegetation substrate is fixed on the slope, thereby achieving a vegetation environment for the rock slope, and proposing a vegetation construction technology suitable for high and steep rock slopes with different slope rates, breaking the limitation that the slope of high and steep rock slopes is difficult to green, and achieving the purpose of vegetation greening construction with full slope rates. The present invention ensures the stability of the cones by setting anti-slipping barbs, and improves the reliability of the fixation of the protective net.

[0036] 2. The present invention uses a limit strip and a limit groove in combination. After the connecting gasket is sleeved on the surface of the threaded column, the limit strip enters the inner cavity of the limit groove, which can limit the rotation of the connecting gasket and the anti-detachment fixed pile frame, thereby ensuring the stability of the slope vegetation environment.

[0037] 3. The microbial agent containing phosphate-solubilizing bacteria produces organic acids during the improvement of the soil matrix, which can not only reduce the pH value in the soil environment, but also directly release the phosphorus in the phosphate in the soil into the soil. In combination with fly ash in different proportions, the water storage capacity of the original matrix is ​​improved, and the content of effective phosphorus, quick-acting potassium and organic matter in the soil is increased. By monitoring the content of effective phosphorus and oxalic acid in different soil samples, this experiment concluded that the content of effective phosphorus and oxalic acid in the soil can be effectively increased by adding fly ash and microbial agents containing phosphate-solubilizing bacteria to the matrix sprayed with guest soil.

[0038] 4. There are many factors that affect the moisture content of the substrate. We found that the number of layers and thickness of the vegetation substrate affect the water retention capacity of the substrate, while fly ash, sodium carboxymethyl cellulose powder and bagasse fiber all play a certain role in water retention in the substrate. The moisture content of the substrate without any one or several of the above components is lower than that of Example 3. Bagasse fiber filaments and corn stalk segments affect the substrate ventilation after guest soil spraying to a certain extent. Among them, we found that using bagasse fiber filaments instead of commonly used corn stalk segments can effectively increase the friction of high and steep slopes, reduce soil erosion, and also have the effect of increasing the ventilation of the substrate. As a nutrient material, the length of bagasse fiber filaments will also affect the substrate ventilation of the guest soil formulation mechanism.

[0039] 5. From the perspective of plant growth, the test was implemented in July. After 2 months of vegetation recovery, the vegetation coverage of Example 3 could reach 92%. After 1 year of recovery, the vegetation coverage of Example 3 could reach 95%. The shrub plants Sophora japonica and Spatholobus chinensis showed obvious growth advantages, were distributed in large quantities and relatively evenly on the slope, and the vegetation had obvious growth. The average heights of Sophora japonica and Spatholobus chinensis were 82 cm and 66 cm respectively. After 2 years of experimental observation, it was found that the implementation of this technology created a vegetation community combining grass and shrubs, and the vegetation coverage could be stably maintained at more than 90%. The vegetation community began to develop in a diversified manner from the artificially planted community. In addition to the good growth and development of the multi-flowered indigo, Spatholobus chinensis, Sophora japonica, and Cynodon dactylon used in the test, the native plants such as Humulus sphaerocephala, Parthenocissus, Lentil, Airplane Grass, and Reed-like plants invaded the slope significantly, and were distributed more on the gentle platform of the slope and the foot of the slope, achieving a better near-natural recovery effect. In addition, through years of research on steep slopes, this application has found a method for calculating the sowing amount suitable for vegetation restoration on steep slopes. This method objectively selects factors that affect seed germination and growth, and measures the sowing amount suitable for vegetation restoration on steep slopes from multiple angles. This method has achieved good recovery rates in the vegetation restoration construction on steep slopes in many places, and the sowing amount in the soil spraying is controlled appropriately according to the local conditions, achieving the effect of cost saving.

[0040] 6. The anti-skid slow-release vegetation rod installed on the steep slope can realize the slow release of nutrients in the fertilizer. The slow-release vegetation rod of the present application can provide nutrients for the slope vegetation for a long time. The slow-release fertilizer and water-retaining agent of different particle sizes are obtained through experiments. The nitrogen release after 24 hours and 72 hours is compared. The nitrogen release obtained by the component ratio of Example 3 of the present application is more balanced, and the nitrogen release in the early stage of plant recovery growth is more balanced.

[0041] 7. By adopting the grid of the protective net and the slope protection device composed of the U-shaped steel sleeve, the ability of the protective device to prevent soil erosion can be improved as a whole during the process of rainwater scouring. After the test, the structure was found to have parameters with better toughness and mechanical properties, that is, the square structure with a side length of 30 cm of the grid, combined with the U-shaped steel sleeve for fixing, has a better mechanical effect, high tear strength and low elongation, higher node bearing capacity, and the geocell composed of the slope after the simulated rainfall runoff erosion test has better mechanical performance parameters. After heavy rainfall, the strength of the soil changes. Examples 1-2 of the present application can all maintain a better stability coefficient, Ks is between 1.42-1.44, among which the roughening treatment of the present application can achieve better stabilization of high and steep slopes. In addition, the planting rod of the present application has the function of slowly releasing nutrients, it can also store rainwater and provide moisture for plant growth, it has an anti-skid slow-release effect on the high and steep slope surface, it can increase friction to prevent the sliding of the slope soil, and it can also provide long-term nutrients and moisture for plant growth. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0043] Figure 1 It is a three-dimensional schematic diagram of the structure of the present invention.

[0044] Figure 2 The present invention Figure 1 Enlarged diagram of point A

[0045] Figure 3 It is a three-dimensional schematic diagram of the reinforcement component of the present invention.

[0046] Figure 4 It is a three-dimensional disassembly schematic diagram of the reinforcement component of the present invention.

[0047] Explanation of the reference numerals in the accompanying drawings: 1. High and steep rock slope; 2. Roughening groove; 3. Protective net; 4. Anti-slip fixed piles; 5. Reinforcement assembly; 51. U-shaped steel sleeve; 52. Cone; 53. Anti-slip steel bar frame; 54. Anti-slip barb; 55. Connecting gasket; 56. Threaded column; 57. Nut; 58. Limit strip; 59. Limit groove. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present application. The materials used in this application are all materials that can be purchased on the market. The ecological agent is a common microbial agent containing phosphate-solubilizing bacteria, which is purchased from Shandong Qilu Chemical Technology Co., Ltd.; the cement is ordinary silicate cement; humic acid granular fertilizers of different particle sizes are produced by Shanxi Jiayou Humic Acid Technology Co., Ltd., and slow-release urea is produced by Hebei Devodo Fertilizer Co., Ltd. Planting sticks, also called ecological sticks, are long or cylindrical planting bags, which are commercially available polypropylene bags or degradable non-woven bags filled with soil and other plant growth matrices. The proportions of each component in this application are all weight-to-weight ratios.

[0049] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0050] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0051] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0052] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0053] In addition, the term "plurality" shall mean two or more.

[0054] Embodiment 1:

[0055] Combination Figure 1-4The embodiment of the present application discloses a high and steep rock slope protection structure, including a plurality of roughening grooves 2 opened on the slope surface of the high and steep rock slope 1, a protective net 3 is laid on the slope surface of the high and steep rock slope 1, a reinforcement component 5 is arranged between the protective net 3 and the inner cavity of the roughening groove 2, the reinforcement component 5 includes an anti-slip steel frame 53 and a U-shaped steel sleeve 51 sleeved on the surface of the protective net 3, the shape of the anti-slip steel frame 53 can be a small piece of steel net, both ends of the U-shaped steel sleeve 51 are fixedly connected with a piercing cone 52, the outer side of the U-shaped steel sleeve 51 is installed with an anti-slip steel frame 53, and an anti-slip fixed pile 4 is arranged between the corners of the protective net 3 and the high and steep rock slope 1. The anti-detachment fixing pile 4 is installed on the inclined surface of the high and steep rock slope 1 by a pile driver, the surface of the protective net 3 is sleeved on the surface of the anti-detachment fixing pile 4, and a plurality of anti-detachment barbs 54 are welded on the surface of the piercing cone 52. The setting of the anti-detachment barbs 54 can ensure that after the piercing cone 52 enters the inner wall of the roughening groove 2, it is ensured that the piercing cone 52 will not easily detach from the inner wall of the roughening groove 2, thereby improving the reliability of the fixing of the protective net 3. A connecting gasket 55 is welded to the middle part of the inner side of the anti-detachment steel bar frame 53, and a threaded column 56 is welded on the surface of the U-shaped steel sleeve 51. The connecting gasket 55 is sleeved on the surface of the threaded column 56, and a nut 57 is threadedly connected to the surface of the threaded column 56. The roughening treatment is to use rock drilling machinery to perform horizontal slope treatment when excavating a stable high and steep rock slope, while ensuring the slope ratio, so that the undulating texture of the slope surface is horizontally striped, the texture is concave or convex with a height difference of 10cm, and the convex part is 10cm wide stripe; the inner grooves are also provided with an interval of 2cm inside the grooves, and the depth of the inner grooves is 3cm. The protective net 3 is a square grid structure with a side length of 30cm.

[0056] Working principle: When the present invention is used, the user opens a roughening groove 2 on the slope surface of the high and steep rock slope 1 by means of a machine, roughens the slope surface in the groove, then lays the protection net 3 on the slope surface of the high and steep rock slope 1, fixes the corners of the protection net 3 by means of the anti-falling fixing piles 4, then passes the protection net 3 through the inner cavity of the roughening groove 2, picks up the U-shaped steel sleeve 51 and covers the surface of the protection net 3, then uses a hammer to make the piercing cone 52 enter the inner wall of the roughening groove 2, and through the anti-falling fixing piles 4, the protection net 3 is fixed to the edge of the protection net 3. The thorn 54 makes the cone 52 firmly fixed, then the anti-slip steel frame 53 is picked up, the connecting gasket 55 is put on the surface of the threaded column 56, and the nut 57 is tightened to ensure that the anti-slip steel frame 53 is firmly fixed in the inner cavity of the roughening groove 2, and the vegetation substrate is sprayed to the inner cavity of the roughening groove 2 on the steep rock slope 1 in the form of dry spraying. The anti-slip steel frame 53 increases the connection strength of the spraying, and the vegetation substrate is firmly attached to the anti-slip steel frame 53, so that the vegetation substrate is not easy to fall off the inner cavity of the roughening groove 2.

[0057] In summary, the high-steep rock slope protection structure adopts the above-mentioned technical scheme, and a roughening groove 2 is mechanically opened on the slope surface of the high-steep rock slope 1 to roughen the slope surface. Then, the protection net 3 is laid on the slope surface of the high-steep rock slope 1, and the corners of the protection net 3 are fixed by anti-detachment fixing piles 4. Then, the protection net 3 is fixed to the inner cavity of the roughening groove 2 through the reinforcement component 5 to fix the vegetation substrate, so that the vegetation substrate is not easy to separate from the inner cavity of the roughening groove 2, that is, the purpose of full-slope vegetation greening construction is achieved. The scheme creates a vegetation community combining grass and shrubs, with a vegetation coverage of more than 95%. The overall slope is flat, and except for slight soil and water loss in the early stage, there is no obvious scouring mark. A variety of plants can grow and develop well, and native plants obviously invade the slope surface, achieving a good near-natural recovery effect.

[0058] Embodiment 2:

[0059] Combination Figure 4 A limiting strip 58 is welded on the top of the inner cavity of the connecting gasket 55, and limiting grooves 59 for the limiting strip 58 to slide are provided on both sides of the surface of the threaded column 56. Through the coordinated use of the limiting strip 58 and the limiting groove 59, after the connecting gasket 55 is sleeved on the surface of the threaded column 56, the limiting strip 58 enters the inner cavity of the limiting groove 59, which can limit the rotation of the connecting gasket 55 and the anti-detachment steel frame 53, thereby ensuring that the vegetation substrate in the form of dry spraying can be stably attached to the surface of the anti-detachment steel frame 53.

[0060] Example 3

[0061] A method for planting vegetation on a steep rock slope using the steep rock slope protection structure of the first embodiment comprises the following steps:

[0062] (1) When excavating a stable high and steep rock slope, use rock drilling machinery to process the slope horizontally. Under the premise of ensuring the slope ratio, process the slope so that the undulating texture of the cleaned slope presents horizontal stripes. The height difference of the texture is preferably within 10 cm, and the raised part can be in the form of a 10 cm wide stripe.

[0063] (2) According to the structure of Example 1, a protective net is laid on the slope of the steep rock slope, a reinforcement component is arranged between the protective net and the inner cavity of the roughening groove, and anti-slip fixed piles are arranged between the corners of the protective net and the steep rock slope. The anti-slip fixed piles are mechanically penetrated into the rock layer or soil layer and anchored on the steep rock slope, and the protective net is fixed on the anti-slip fixed piles;

[0064] (3) The slope surface is flat, and the fine pumice on the surface is cleaned with water. For slopes with a slope ratio of less than 1:0.75 (the slope ratio is the ratio of the vertical height to the horizontal width of the slope), the vegetation substrate and plant seeds are directly mixed and sprayed onto the slope surface to form a matrix layer containing a seed layer. The spraying thickness is 12 cm, wherein the vegetation substrate comprises the following components in parts by weight: 10 parts of cement, 6 parts of ecological agent, 2 parts of fly ash, 2 parts of sodium carboxymethyl cellulose powder, 4 parts of sugarcane bagasse fiber (5 cm long filaments), and 100 parts of sandy loam; the ecological agent is a commonly used microbial agent, preferably an agent or fertilizer containing phosphate-solubilizing bacteria;

[0065] The sowing amount of plant seeds is calculated according to formula (1):

[0066] W=G×Q / (1000×T×C×D×P×R) (1)

[0067] W---plant seed sowing amount, g / m 2 ;

[0068] G---desired plant density, plants / m 2 ;

[0069] Q---1000-grain weight of seeds, g;

[0070] T---Correction rate of the thickness of the matrix layer containing the seed layer. The correction rate of the thickness of the matrix layer containing the seed layer is 2cm-3cm, and the correction rate of the thickness of the matrix layer containing the seed layer is greater than 3cm. 0.8,

[0071] C---site condition correction rate, the correction rate for slope ratio less than 1:0.75 is 0.9, the correction rate for slope ratio between 1:0.75-1:0.5 is 0.8, and the correction rate for slope ratio greater than 1:0.5 is 0.7;

[0072] D---Correction rate during construction period. The correction rate during the non-plant growing season is 0.8, and the correction rate during the plant growing season is 1;

[0073] P---seed purity, %;

[0074] R---seed germination rate, %.

[0075] For slopes with a slope ratio greater than 1:0.75, first anchor rods are used to tie planting rods. The planting rods are filled with the following components by weight: 100 parts of sandy loam, 3 parts of rice husks, 5 parts of 8mm humic acid granules, 5 parts of slow-release urea, 1 part of sodium carboxymethyl cellulose powder, and 5 parts of nitrogen, phosphorus and potassium compound fertilizer granules. The nitrogen, phosphorus and potassium compound fertilizer granules are universal compound fertilizers, i.e., nitrogen, phosphorus and potassium: 15-15-15. The longitudinal spacing of the planting rods with a slope ratio less than 1:0.3 is 1m, and the longitudinal spacing of the planting rods with a slope ratio of more than 1:0.3 is 0.8m. Then, a protective net (preferably a galvanized wire mesh) is tied to the anchor rod for fixation. The protective net is attached to the slope surface within 5cm with a reinforcement component for reinforcement of the planting substrate, and then dry spraying is used. The process comprises spraying a first layer of vegetation substrate, the spraying thickness of the vegetation substrate is 8 cm, wherein the vegetation substrate comprises the following components in weight proportion: 11 parts of cement, 6 parts of bagasse fiber (5 cm long filaments), 6 parts of ecological agent, 3 parts of fly ash, 4 parts of sodium carboxymethyl cellulose powder, and 100 parts of sandy loam, wherein the ecological agent is a commonly used microbial agent, preferably an agent or fertilizer containing phosphate-solubilizing bacteria; spraying a second layer on the first layer, that is, mixing the first layer of vegetation substrate (only replacing the 3 cm filaments of bagasse fiber) with plant seeds and spraying them onto the slope surface to form a matrix layer containing a seed layer, the spraying thickness is 2 cm; after spraying the last layer of vegetation substrate, timely cover the ground; the sowing amount of plant seeds is calculated according to formula (1).

[0076] Test 1: Slow-release test of vegetation sticks with different component ratios

[0077] Test method: This test studies the slow-release effect of planting sticks with different component ratios, that is, different ratios of humic acid granular fertilizer, slow-release urea and sodium carboxymethyl cellulose powder (water retention), and the slow-release effect of the combination with slow-release fertilizer on soil nutrients. Test on slow-release nitrogen of planting sticks with different component ratios: accurately weigh 0.5g of slow-release fertilizer composed of planting stick raw materials with different ratios, and place them in different 250mL beakers respectively, and let them stand for 24h. The initial pH of the solution is 6.8. After the slow-release fertilizer is saturated with adsorption, filter it, weigh the mass of the gel, collect the filtrate, and then put the gel in an oven to dry to constant weight. Put it in distilled water and let it stand for 24h / 72h, then filter it, weigh the mass of the gel, determine the volume of the filtrate and the total nitrogen content, and then put it in an oven to dry to constant weight, and calculate the nitrogen release of the slow-release fertilizer; the total nitrogen content is determined by the sulfuric acid-hydrogen peroxide digestion Nessler colorimetric method. Nitrogen release (mg·g -1 ) Calculation method: Q s =C2·V2 / m, where: C2—total nitrogen content of the filtrate after filtration with distilled water, mg·L -1 ; V2—the volume of the filtrate after adding distilled water and filtering, L; m——the mass of the slow-release fertilizer before adding the solution.

[0078] Table 1 Sustained release test of plant growth sticks with different component weight ratios

[0079]

[0080] Test results: The anti-skid slow-release plant rod installed on the steep slope can realize the slow release of nutrients in the fertilizer. The slow-release plant rod of the present application can provide nutrients for the slope vegetation for a long time. The slow-release fertilizer and water-retaining agent of different particle sizes are obtained through experiments. The nitrogen release amount obtained by the component ratio of Example 3 of the present application is relatively balanced. Among them, the humic acid granular fertilizer of different particle sizes can realize the slow release of effective nitrogen. The particles are too small (humic acid 5mm), or the humic acid content is high, which affects the release of nitrogen in the early stage. If the particles are too small, the release of nitrogen in the early stage is too fast. Sodium carboxymethyl cellulose also plays a role in retaining water in the soil. If the water-retaining agent is not added, the release of nitrogen in the early stage will also show the effect of too fast release; if the amount is too much, the soil aggregate structure formed is too large, which is not conducive to the release of nitrogen in the early stage.

[0081] Experiment 2: Effects of high and steep slope spraying methods on soil ventilation and moisture content

[0082] Experimental method: The effects of different high-steep slope spraying methods on soil ventilation and water content were studied. Specifically, a 1m*1m test plot was set on the high-steep slope with a slope ratio of 1:0.5. The following treatment plots were set to form a substrate layer for plant growth. After spraying, water was poured thoroughly. The substrate moisture content (%), substrate ventilation (maximum volumetric oxygen content per square meter of substrate, unit m2) and soil moisture content (%) were calculated and measured 30 days after spraying. 3 / m 2 ), available phosphorus content (mg / kg) and organic acid (oxalic acid) content (mg / kg), each treatment was repeated three times and the average value was taken. Plant seeds were mixed according to the weight ratio: Sophora japonica 4.6: Morus alba 3.5: Cynodon dactylon 1.5, Indigofera odorifera 3, the sowing amount was calculated according to the formula of Example 3, the vegetation was restored for 2 months (implemented in Hechi, Guangxi in July 2022), and the vegetation coverage in each sample plot was measured after 1-2 years.

[0083] Example 3

[0084] The first layer of vegetation substrate is 8 cm thick and contains 11 parts of cement, 6 parts of bagasse fiber (5 cm long filaments), 6 parts of ecological agent, 3 parts of fly ash, 4 parts of sodium carboxymethyl cellulose powder, and 100 parts of sandy loam.

[0085] The second layer of vegetation substrate + seeds, 2 cm thick, 11 parts of cement, 6 parts of bagasse fiber (3 cm long filaments), 6 parts of ecological agent, 3 parts of fly ash, 4 parts of sodium carboxymethyl cellulose powder, and 100 parts of sandy loam.

[0086] Comparative Example 1: Other raw materials are the same as in Example 1, and the thickness of the first layer is replaced with 5 cm.

[0087] Comparative Example 2: Other raw materials are the same as those in Example 1, the first layer of vegetation substrate is omitted, and the second layer is directly sprayed.

[0088] Comparative Example 3: Other raw materials are the same as those in Example 1, and the first and second layers of fly ash are omitted.

[0089] Comparative Example 4: Other raw materials are the same as those in Example 1, and the first and second layers of microbial agents containing phosphate-solubilizing bacteria are omitted.

[0090] Comparative Example 5: Other raw materials are the same as those in Example 1, and the first and second layers of sodium carboxymethyl cellulose powder are omitted.

[0091] Comparative Example 6: Other raw materials are the same as those in Example 1, and bagasse fiber is omitted from both the first layer and the second layer.

[0092] Comparative Example 7: The other raw materials are the same as those in Example 1, and the first and second layers of bagasse fiber filaments are replaced with corn stalks.

[0093] Comparative Example 8: Other raw materials are the same as those in Example 1, and the first and second layers of bagasse fiber filaments are both 3 cm long.

[0094] Table 2 Effects of high and steep slope spraying methods on soil ventilation and moisture content

[0095]

[0096]

[0097] Test results: The microbial agent containing phosphate-solubilizing bacteria produces organic acid during the improvement of the soil matrix, which can not only reduce the pH value in the soil environment, but also directly release the phosphorus in the phosphate in the soil into the soil. The water storage capacity of the original matrix is ​​improved by cooperating with fly ash in different proportions, and the content of available phosphorus, quick-acting potassium and organic matter in the soil is increased. This experiment monitors the content of available phosphorus and oxalic acid in different soil samples, and it is concluded that by adding fly ash and a microbial agent containing phosphate-solubilizing bacteria to the matrix sprayed with guest soil, the content of available phosphorus and oxalic acid in the soil can be effectively increased. The data of comparative examples 3 and 4 when using only one of the components show that fly ash and a microbial agent containing phosphate-solubilizing bacteria have a synergistic effect, and the content of available phosphorus and oxalic acid is significantly reduced when one of the components is omitted compared with other comparative examples or embodiments. There are many factors that affect the moisture content of the substrate. We found that the number of layers and thickness of the vegetation substrate affect the water retention capacity of the substrate, while fly ash, sodium carboxymethyl cellulose powder and bagasse fiber all play a certain role in water retention in the substrate. The moisture content of the substrate omitting any one or several of the above components is lower than that of Example 3. Bagasse fiber filaments and corn stalk segments affect the substrate ventilation after guest soil spraying to a certain extent. Among them, we found that using bagasse fiber filaments instead of commonly used corn stalk segments can effectively increase the friction of high and steep slopes, reduce soil and water loss, and also have the effect of increasing the ventilation of the substrate. The length of bagasse fiber filaments will also affect the substrate ventilation of the guest soil formula mechanism. At the same time, the length of bagasse fiber filaments in the first layer of the bottom substrate is conducive to increasing the slope friction of the high and steep slopes and reducing the soil and water loss rate. In addition, the combined use of fly ash and sodium carboxymethyl cellulose powder, two soil conditioners, can enable the guest soil matrix to form a light, cohesive, granular structure that is not prone to soil erosion. It has good agglomeration and good ventilation, providing a good growth environment for plants growing on the guest soil matrix. A comparative study showed that the ventilation volume of the matrix decreased significantly when any one of them was omitted, and the water retention capacity of the matrix was significantly reduced.

[0098] From the perspective of plant growth, the test was implemented in July. One week after the test was implemented, plant seeds began to germinate. It was found that yellow flower Sophora japonica and car mulberry seeds germinated sporadically. The germination amount of Cynodon dactylon was large and grew fast. After the vegetation was restored for 2 months, the vegetation coverage of Example 3 could reach 92%. The vegetation community was mainly Cynodon dactylon. Because the shrubs grew slowly and the herbaceous community was dense, it was found that car mulberry, yellow flower Sophora japonica, and multi-flowered indigo were distributed sporadically. The germination of the three shrub car mulberry was relatively good. After one year of recovery, the vegetation coverage of Example 3 could reach 95%. The shrub plants yellow flower Sophora japonica and car mulberry plants showed obvious growth advantages, were distributed in large quantities and relatively evenly on the slope, and the vegetation had obvious growth. The average heights of yellow flower Sophora japonica and car mulberry were 82cm and 66cm respectively.

[0099] After two years of experimental observation, it was found that the implementation of this technology created a vegetation community that combined grass and shrubs, and the vegetation coverage could be stably maintained at more than 90%. The vegetation community began to diversify from artificially planted communities. In addition to the Indigofera ovata, Caragana chinensis, Sophora japonica, and Cynodon dactylon used in the experiment, which grew and developed well, native plants such as Humulus foetida, Parthenocissus, Lablab pea, Alpinia sphaerocephala, and Reed have obviously invaded the slope, and are mostly distributed on the gentle platform of the slope and at the foot of the slope, achieving a good near-natural restoration effect.

[0100] Experiment 3: Influence of different slope geotechnical structure mechanical properties parameters

[0101] Test method: This test mainly studies the influence of different slope geotechnical structure dimensions on parameters such as the bearing capacity of the slope geotechnical structure. Specifically, the slope structure of Embodiment 1-2 of the present invention is adopted, wherein the grid side length (square) of the protective net 3, the ordinary anchor rod (rebar) or the U-shaped steel sleeve are used to improve the tensile and creep resistance of the overall slope structure. The simulated slope ratio is 1:0.75, the simulated rainfall runoff erosion force, the raindrop diameter is selected as 5mm, the raindrop flow speed is 9.11m / s, and under the condition of surface water flow depth of 100mm, the influence of different grass-planted slope geotechnical structure mechanical performance parameters (tear strength, elongation, node bearing capacity, stability coefficient Ks) is simulated and calculated.

[0102] Table 3 Effects of different grass-planted slope geotechnical structures on slope mechanical performance parameters

[0103]

[0104]

[0105] Test results: The protective structure of the steep slope of Examples 1-2 of the present application is specifically a slope protection device composed of a grid of a protective net, a U-shaped steel sleeve and a roughening treatment. In the process of rainwater scouring, the ability of the protective device to prevent soil erosion can be improved as a whole. After the test, the structure obtained parameters with better toughness and mechanical properties, that is, a square structure with a side length of 30 cm, roughening treatment, and a good mechanical effect of fixing with a U-shaped steel sleeve, high tear strength and low elongation, and higher node bearing capacity, indicating that the geocell composed of the slope after the simulated rainfall runoff erosion test through the protection system of Example 1 has better mechanical performance parameters. When Test Example 6 is fixed with ordinary anchor rods, its tear strength is significantly reduced, and the elongation rate will also increase, which is not conducive to the stability of the slope. The optimal side length of the protective net is 30 cm. If it is too long, the bearing capacity will be significantly reduced, and the elongation rate will increase, which is not conducive to the stability of the slope; if the side length is too small, although the node bearing capacity is enhanced, its elongation rate will be significantly reduced, and the elongation rate is too low, which is not conducive to protecting the slope from the hazards of extreme weather erosion.

[0106] After heavy rainfall, the soil strength changes. Examples 1-2 of the present application can maintain a relatively optimal stability coefficient, Ks is between 1.42-1.44, and the roughening treatment used in the present application can achieve a better stabilization of steep slopes. In addition, the planting stick of the present application has the function of slowly releasing nutrients. It can also store rainwater and provide moisture for plant growth. It has an anti-slip slow-release effect on steep slopes, which can increase friction to prevent the sliding of soil on the slope, and can also provide long-term nutrients and moisture for plant growth.

[0107] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high and steep rock slope protection structure, characterized by: The invention comprises a plurality of roughening grooves (2) provided on the surface of a high and steep rock slope (1); a protective net (3) is laid on the surface of the high and steep rock slope (1); a reinforcement component (5) is arranged between the protective net (3) and the inner cavity of the roughening groove (2); the reinforcement component (5) comprises a U-shaped steel sleeve (51) sleeved on the surface of the protective net (3); both ends of the U-shaped steel sleeve (51) are fixedly connected with a piercing cone (52); and an anti-slip steel frame (53) is installed on the outer side of the U-shaped steel sleeve (51).

2. A high and steep rock slope protection structure according to claim 1, characterized in that: Anti-slip fixing piles (4) are arranged between the corners of the protection net (3) and the high and steep rock slope (1); the anti-slip fixing piles (4) are installed on the inclined surface of the high and steep rock slope (1) by a pile driver, and the surface of the protection net (3) is sleeved on the surface of the anti-slip fixing piles (4).

3. The high and steep rock slope protection structure according to claim 1 is characterized by: A plurality of anti-slip barbs (54) are welded on the surface of the piercing cone (52).

4. The high and steep rock slope protection structure according to claim 1 is characterized by: A connection gasket (55) is welded to the middle of the inner side of the anti-slip steel bar frame (53), a threaded column (56) is welded to the surface of the U-shaped steel sleeve (51), the connection gasket (55) is sleeved on the surface of the threaded column (56), and a nut (57) is threadedly connected to the surface of the threaded column (56).

5. A high and steep rock slope protection structure according to claim 4, characterized in that: A limit strip (58) is welded to the top of the inner cavity of the connection gasket (55), and limit grooves (59) for the limit strip (58) to slide are provided on both sides of the surface of the threaded column (56).

6. A high and steep rock slope protection structure according to claim 5, characterized in that: The roughening groove (2) is used for roughening treatment. When a stable high and steep rock slope is excavated, the rock drilling machine is used for transverse slope treatment under the premise of ensuring the slope ratio, so that the undulating texture of the slope cleaning presents transverse stripes, the height difference of the texture is within 10 cm, and the convex part is in the form of a strip with a width of 10 cm.

7. A method for planting vegetation on a steep rock slope using the steep rock slope protection structure of claim 1, comprising the following steps: (1) When excavating a stable high and steep rock slope, use rock drilling machinery to perform transverse slope treatment. Roughen the slope while ensuring the slope ratio, so that the undulating lines of the slope surface show transverse stripes; (2) According to the structure of claim 1, a protective net is laid on the slope of the steep rock slope, a reinforcement component is arranged between the protective net and the inner cavity of the roughening groove, and anti-slip fixed piles are arranged between the corners of the protective net and the steep rock slope. The anti-slip fixed piles are mechanically penetrated into the rock layer or soil layer and anchored on the steep rock slope, and the protective net is fixed on the anti-slip fixed piles; (3) The slope surface is flat and the fine pumice on the surface is removed by water. For slopes with a slope ratio of less than 1:0.75 (the slope ratio is the ratio of the vertical height to the horizontal width of the slope), the planting substrate and plant seeds are directly mixed and sprayed on the slope surface. The spraying thickness is 10-12 cm, of which: The vegetation substrate comprises the following components in weight proportions: 8-10 parts of cement, 4-6 parts of ecological agent, 2-3 parts of fly ash, 1-2 parts of sodium carboxymethyl cellulose powder, 2-4 parts of bagasse fiber (3-5 cm long filaments), and 100 parts of sandy loam; the ecological agent is a commonly used microbial agent, preferably an agent or fertilizer containing phosphate-solubilizing bacteria; The sowing amount of plant seeds is calculated according to formula (1): W=G×Q / (1000×T×C×D×P×R) (1) W---plant seed sowing amount, g / m 2 ; G---desired plant density, plants / m 2 ; Q---1000-grain weight of seeds, g; T---Correction rate of the thickness of the matrix layer containing the seed layer. The correction rate of the thickness of the matrix layer containing the seed is 2cm-3cm, and the correction rate of the thickness of the matrix layer containing the seed is greater than 3cm. 0.8, C---site condition correction rate, the correction rate for slope ratio less than 1:0.75 is 0.9, the correction rate for slope ratio between 1:0.75-1:0.5 is 0.8, and the correction rate for slope ratio greater than 1:0.5 is 0.7; D---The correction rate during the construction period in the non-plant growing season is 0.8, and the correction rate during the plant growing season is 1; P---seed purity, %; R---seed germination rate, %; When the slope ratio is greater than 1:0.75, first drive anchor rods to tie planting rods. The planting rods are filled with 100 parts of sandy loam, 3-4 parts of rice husks, 5-6 parts of 8mm humic acid granular fertilizer, 3-5 parts of slow-release urea, 1-2 parts of sodium carboxymethyl cellulose powder, and 3-5 parts of nitrogen, phosphorus and potassium compound fertilizer granules, which are composed by weight. The longitudinal spacing of the planting rods with a slope ratio less than 1:0.3 is 0.8-1.2m, and the longitudinal spacing of the planting rods with a slope ratio of more than 1:0.3 is 0.6-0.8m. Then tie the protective net on the anchor rod for fixation, and use the reinforcement component to make the protective net fit within 5cm of the slope surface for reinforcement of the planting substrate. Then dry spray the first layer of planting substrate and spray sow. The thickness is 8-10 cm, wherein the vegetation substrate comprises the following components in weight proportion: 10-12 parts of cement, 4-6 parts of bagasse fiber (3-5 cm long filaments), 3-4 parts of fly ash, 5-7 parts of ecological agent, 3-4 parts of sodium carboxymethyl cellulose powder, and 100 parts of sandy loam, wherein the ecological agent is a commonly used microbial agent, preferably an agent or fertilizer containing phosphate-solubilizing bacteria; and then a second layer is sprayed thereon, that is, the materials of the first layer of vegetation substrate are mixed in proportion, and then mixed with plant seeds and sprayed onto the slope surface to form a matrix layer containing a seed layer, and the spraying thickness is 2-3 cm; after spraying the second layer, the substrate is covered in time; the sowing amount of plant seeds is calculated according to formula (1).

8. The method according to claim 7, characterized in that: The roughening treatment is to use rock drilling machinery to perform transverse slope treatment when excavating a stable high and steep rock slope, while ensuring the slope ratio, so that the undulating texture of the cleaned slope presents transverse stripes, the height difference of the texture is within 10cm, and the convex part is in the form of a strip with a width of 10cm; inner grooves are also provided inside the grooves with an interval of 2cm, and the depth of the inner grooves is 2-3cm.

9. The method according to claim 7, characterized in that: The planting stick is filled with the following components in parts by weight: 100 parts of sandy loam, 3 parts of rice husks, 5 parts of 8mm humic acid granular fertilizer, 5 parts of slow-release urea, 1 part of sodium carboxymethyl cellulose powder, and 5 parts of nitrogen, phosphorus and potassium compound fertilizer granules.

10. The method according to claim 7, characterized in that: For the slope with a slope ratio greater than 1:0.75, the first layer of vegetation substrate is 8 cm thick, composed of 11 parts of cement, 6 parts of bagasse fiber (5 cm long filaments), 6 parts of ecological agent, 3 parts of fly ash, 4 parts of sodium carboxymethyl cellulose powder, and 100 parts of sandy loam; the second layer of vegetation substrate + seeds is 2 cm thick, composed of 11 parts of cement, 6 parts of bagasse fiber (3 cm long filaments), 6 parts of ecological agent, 3 parts of fly ash, 4 parts of sodium carboxymethyl cellulose powder, and 100 parts of sandy loam.

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