Spray-seeding and grass-planting protection method for strongly-weathered sandstone roadbed slope

Abstract

The invention provides a spray seeding and grass planting protection method for a strongly-weathered sandstone roadbed slope, and relates to the technical field of grass planting protection for the strongly-weathered sandstone roadbed slope, and the method comprises the following steps: preparing spray seeding soil, uniformly mixing the spray seeding soil for the first time, and standing the spray seeding soil after uniformly mixing; spraying water to infiltrate the strongly weathered sandstone side slope, and inserting fine bamboo sticks at the same time; uniformly mixing the spray-seeding soil by using a spray-seeding machine, and spray-seeding the spray-seeding soil onto the side slope; according to the method, the problems that the strongly-weathered sandstone side slope is poor in cohesiveness and dry and the like are effectively solved through the steps of covering the surface of the side slope subjected to spray-seeding with a straw mat and a geonet, removing the straw mat and the geonet after grass roots on the side slope, the retaining time of spray-seeding planted grass is long, secondary or multiple repeated spray-seeding is reduced, and the service life of the side slope is prolonged. Meanwhile, the spray-seeding effect is good, the spray-seeding effect is not prone to being washed by rainwater after spray-seeding, the water-retaining property is good, the survival rate of plants is guaranteed, and the safety and stability of the strongly-weathered sandstone roadbed slope are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of grass planting protection for strongly weathered sandstone roadbed slopes, and in particular to a spray-seeding grass planting protection method for strongly weathered sandstone roadbed slopes. Background Art

[0002] Slope protection is a crucial measure for roadbed stability and durability. There are many types of slope protection, including structural, ecological, and integrated. With increasing demand for environmental protection, more and more slope protection methods are being adopted. Direct seeding of grass seeds or spraying a mixture of seeds, substrate, and adhesive is the most commonly used slope protection measure. These methods are suitable for gentle slopes (gradients < 1:1.5) and require the use of water-retaining agents and non-woven fabric coverings. For medium and high slopes, lattice beams and grass planting are used. Concrete lattice beams divide the slope surface, with the grids filled with soil and grass. This method has proven effective for both rock and soil slopes.

[0003] Common arch frames require spray seeding for grass planting. Different soil types require different spray seeding methods. For rock slopes, due to the strong integrity of rock slopes, the requirements and standards for spray seeding base soil are lower. However, for soil slopes, especially strongly weathered sandstone slopes, due to the severe degree of weathering and poor adhesion of sand and gravel, it is difficult to achieve adhesion of ordinary spray seeding soil. Most of the spray seeding soil is washed away after rainfall, resulting in the need for multiple spray seeding and grass planting, which not only consumes a lot of manpower and machinery, but also increases costs. Summary of the Invention

[0004] The embodiment of the present invention provides a spray-seeding and grass-planting protection method for strongly weathered sandstone roadbed slopes, which is used to solve the above-mentioned problems.

[0005] In view of the above problems, the technical solution proposed by the present invention is: A spray-seeding and grass-planting protection method for strongly weathered sandstone roadbed slopes comprises the following steps: Prepare the spraying soil and mix it for the first time. After mixing, let the spraying soil stand for 0.5 to 2 days; Spray water on the strongly weathered sandstone slope and insert thin bamboo sticks at the same time, with 5cm~10cm of the sticks exposed; Use a sprayer to mix the above-mentioned spray soil evenly and spray it onto the slope with a thickness of 4-6 cm. Cover the surface of the slope after spraying with straw mats and geonets, and remove the straw mats and geonets after the grass takes root on the slope.

[0006] In order to better implement the technical solution of the present invention, the following technical measures are also adopted.

[0007] Furthermore, the bamboo sticks are arranged at equal intervals at a density of 5 to 10 per square meter.

[0008] Furthermore, the configuration process of the spraying soil includes the following steps: Cutting the fiber material into short pieces of 5 to 15 cm in length to obtain chopped fibers a; The seeds, base soil, fertilizer, water retaining agent and chopped fiber a are mixed for the first time.

[0009] Furthermore, the configuration process of the spraying soil includes the following steps: Cut the fiber material into short pieces with a length of 0.2-0.5 cm to obtain chopped fibers b; Mix the seeds, base soil, fertilizer, water retaining agent and chopped fiber b for the first time.

[0010] Furthermore, after the first mixing is completed and left to stand for 0.5 to 2 days, a second mixing is performed. After the mixing is completed, the spraying soil is injected into the anchor pot.

[0011] Furthermore, the anchoring pot body includes a cubic outer frame, each surface of which has an opening, wherein the two sides of each surface deviating from the opening are respectively defined as a first mounting surface and a second mounting surface, a plurality of hooks are respectively provided on the first mounting surface and the second mounting surface, and a diaphragm with a through hole is provided at the opening, and the above-mentioned second mixed spraying soil is filled inside the cubic outer frame.

[0012] Furthermore, the barbs are randomly arranged, and the barbs cover the first mounting surface and the second mounting surface respectively.

[0013] Furthermore, the size of the anchoring bowl body is adapted to the specifications of the spraying machine.

[0014] Furthermore, the anchoring bowl is made of biodegradable plastic.

[0015] Furthermore, the method further comprises the following steps: using a spraying machine to mix the second mixed spraying soil with the anchor pot, and then spraying it onto the slope, with the spraying thickness being 4 to 6 cm.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) It effectively solved the problems of poor adhesion and dryness of strongly weathered sandstone slopes. The spray-seeded grass can be maintained for a long time, which reduces the need for repeated spraying and reduces the labor and machinery costs of repeated construction.

[0017] (2) The construction process is fast and effective in completing the spraying and planting of grass, and the grass can be preserved for a long time on the slope of the strongly weathered sandstone roadbed, ensuring that the grass takes root in the slope.

[0018] (3) The material cost is low, the spraying effect is good, it is not easy to be washed away by rain after spraying, and it has good water retention, which ensures the survival rate of plants.

[0019] (4) Reduce the damage of rainwater erosion to the protection of the strongly weathered sandstone roadbed slope, reduce the cost and expense increase caused by secondary spraying and planting grass, and contribute to the safety and stability of the strongly weathered sandstone roadbed slope.

[0020] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a flow chart of Example 1 of the spray-seeding and grass-planting protection method for strongly weathered sandstone roadbed slopes disclosed in an embodiment of the present invention; Figure 2 Flowchart of Example 2 of the spray-seeding grass protection method for the strongly weathered sandstone roadbed slope disclosed in the embodiment of the present invention; Figure 3 This is a schematic structural diagram of the anchoring bowl disclosed in an embodiment of the present invention; Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle.

[0022] Reference numerals: 1, outer frame of the cube; 11, opening; 12, first mounting surface; 13, second mounting surface; 2, barb; 3, diaphragm; 31, through hole. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Example

[0024] like Figure 1 As shown, a spray-seeding and grass-planting protection method for a strongly weathered sandstone roadbed slope includes the following steps: S1, material preparation.

[0025] Materials include: seeds, base soil, fertilizer, water retaining agent and fiber materials, of which: Fiber materials include but are not limited to wheat straw, dead grass, etc., which are used to form a three-dimensional network structure in the soil, increase the shear strength and tensile strength of the soil, and reduce landslides and collapses on slopes due to rain erosion or gravity. At the same time, the porous structure of the fiber can absorb moisture, prolong the soil moistening time, and provide moisture support for plant seed germination and seedling growth. After mixing with soil, the fiber can absorb fertilizer or organic matter, slow down nutrient loss, and improve fertilizer utilization efficiency.

[0026] The base soil includes but is not limited to red clay, yellow clay, etc., which is used as the main body of the spraying matrix to provide a basic environment for plant growth.

[0027] Fertilizers are common slow-release fertilizers or compound fertilizers, which are used to provide the nutrients required for plant growth.

[0028] Water-retaining agents include but are not limited to polyacrylamide, lignocellulose, etc., which are used to improve soil moisture conditions and promote seed germination and seedling growth.

[0029] S2, chopped fiber materials such as wheat straw are cut into short pieces to obtain chopped fibers a.

[0030] The length of the chopped fibers a ranges from 5 to 15 cm, and the chopped fibers a are obtained by cutting fiber materials such as wheat straw and dead grass into pieces with a length of 5 to 15 cm.

[0031] In this embodiment, when the soil is directly sprayed by a sprayer, the length of the fiber material a is controlled to be 5 to 15 cm.

[0032] S3, mix grass seeds, base soil, fertilizer, water retaining agent, and chopped fiber a.

[0033] S4, after the first mixing, the mixture is allowed to stand.

[0034] After obtaining the materials for spraying soil, the grass seeds, base soil, fertilizer, water retaining agent, and chopped fiber a are mixed for the first time. After the mixing is completed, the spraying soil is left to stand for 0.5 to 2 days.

[0035] S5, put it into the sprayer and stir evenly.

[0036] After the spraying soil has been allowed to stand for 0.5 to 2 days, put the spraying soil into the spraying machine and stir it evenly.

[0037] S6, slope water spraying and infiltration.

[0038] S7: Insert thin bamboo sticks. The bamboo sticks are evenly spaced at a density of 5 to 10 per square meter, with 5 to 10 cm of bamboo sticks exposed.

[0039] S8, spray seeding, use a spray seeding machine to mix the above-mentioned spray soil evenly, and then spray it onto the slope with a spraying thickness of 4~6cm.

[0040] S9, covering with straw mats and geonet. Cover the slope surface after spraying with straw mats and geonet.

[0041] S10, remove the straw mat and geonet after the grass takes root. Example

[0042] like Figure 2 As shown, a spray-seeding and grass-planting protection method for a strongly weathered sandstone roadbed slope includes the following steps: S1, material preparation.

[0043] Materials include: seeds, base soil, fertilizer, water retaining agent and fiber materials, of which: Fiber materials include but are not limited to wheat straw, dead grass, etc., which are used to form a three-dimensional network structure in the soil, increase the shear strength and tensile strength of the soil, and reduce landslides and collapses on slopes due to rain erosion or gravity. At the same time, the porous structure of the fiber can absorb moisture, prolong the soil moistening time, and provide moisture support for plant seed germination and seedling growth. After mixing with soil, the fiber can absorb fertilizer or organic matter, slow down nutrient loss, and improve fertilizer utilization efficiency.

[0044] The base soil includes but is not limited to red clay, yellow clay, etc., which is used as the main body of the spraying matrix to provide a basic environment for plant growth.

[0045] Fertilizers are common slow-release fertilizers or compound fertilizers, which are used to provide the nutrients required for plant growth.

[0046] Water-retaining agents include but are not limited to polyacrylamide, lignocellulose, etc., which are used to improve soil moisture conditions and promote seed germination and seedling growth.

[0047] S2, fibrous materials such as wheat straw are cut into short pieces to obtain chopped fibers b.

[0048] The length of the chopped fibers b ranges from 0.2 to 0.5 cm, and the chopped fibers b are obtained by cutting fiber materials such as wheat straw and dead grass into pieces with a length of 0.2 to 0.5 cm.

[0049] In this embodiment, when a sprayer is used to directly spray the soil and anchor the pot, the length of the fiber material b is controlled to be 0.2-0.5 cm.

[0050] S3, mix grass seeds, base soil, fertilizer, water retaining agent, and chopped fiber b.

[0051] S4, after the first mixing, the mixture is allowed to stand.

[0052] S5, after the second mixing, inject the spraying soil into the anchor pot.

[0053] S6. Put the anchor pot and seeding soil into the seeding machine and mix them evenly.

[0054] The above steps S2 to S6 can also be implemented according to another implementation step, which is defined as implementation step a, including the following steps: S2a, cutting wheat straw, dead grass and other fiber materials into 5-15 cm length to obtain chopped fibers a, cutting wheat straw, dead grass and other fiber materials into 0.2-0.5 cm length to obtain chopped fibers b.

[0055] S3a, mixing grass seeds, base soil, fertilizer, water retaining agent, and chopped fiber a to obtain spraying soil a1, and mixing grass seeds, base soil, fertilizer, water retaining agent, and chopped fiber b to obtain spraying soil b.

[0056] S4a, respectively, mixing the spraying soil a1 and the spraying soil b for the first time, and after the first mixing is completed, letting the mixture stand for 0.5 to 2 days.

[0057] S5a, after the static state is completed, the spraying soil a1 and the spraying soil b are mixed for the second time respectively. After the second mixing is completed, the spraying soil b is injected into the anchor pot.

[0058] S6a, putting the anchor pot and the seeding soil a1 into a seeding machine and stirring them evenly.

[0059] The above steps S2 to S6 may also be implemented according to another implementation step, defined as implementation step b, comprising the following steps: S2b, cutting wheat straw, dead grass and other fiber materials into 5-15 cm length to obtain chopped fibers a, cutting wheat straw, dead grass and other fiber materials into 0.2-0.5 cm length to obtain chopped fibers b.

[0060] S3b, mixing base soil, fertilizer, water-retaining agent, and chopped fiber a to obtain spraying soil a2, and mixing grass seeds, base soil, fertilizer, water-retaining agent, and chopped fiber b to obtain spraying soil b.

[0061] S4b, respectively, mixing the spraying soil a2 and the spraying soil b for the first time, and after the first mixing is completed, letting the mixture stand for 0.5 to 2 days.

[0062] S5b, after the static state is completed, the spraying soil a2 and the spraying soil b are mixed for the second time respectively. After the second mixing is completed, the spraying soil b is injected into the anchor pot.

[0063] S6b, put the above anchor pot and spraying soil a2 into the spraying machine and stir them evenly.

[0064] The differences between the above three embodiments are: In steps S2 to S6, chopped fiber b is used instead of chopped fiber a, and the anchoring pot is used as a carrying container for the spraying soil. The anchoring pots are connected to each other and the arranged bamboo sticks and the covered spraying soil form an integrated cross-linked structure, which can effectively improve its stability and scouring resistance, reduce the damage caused by rainwater scouring to the protection of the strongly weathered sandstone roadbed slope, and ensure the survival rate of plants.

[0065] In steps S2a to S6a, the chopped fiber a is partially replaced by the chopped fiber b, wherein the chopped fiber a and the material form the spraying soil a1, and the chopped fiber b and the material form the spraying soil b. The anchoring pot is used as a carrying container for the spraying soil. The anchoring pots are connected to each other and the arranged bamboo sticks and the covered spraying soil form an integrated cross-linked structure, which can effectively improve its stability and scouring resistance, reduce the damage caused by rainwater scouring to the protection of the strongly weathered sandstone roadbed slope, and ensure the survival rate of plants. The role of the chopped fiber a is to form a three-dimensional network structure in the soil during the spraying process, further improving the stability of the integrated cross-linked structure. At the same time, seeds are configured in the spraying soil a1 to increase the density of plant coverage.

[0066] In steps S2b~S6b, the chopped fiber a is partially replaced by the chopped fiber b, wherein the chopped fiber a and the material form the spraying soil a2, and the chopped fiber b and the material form the spraying soil b. The anchoring pot is used as the carrying container of the spraying soil. The anchoring pots are connected to each other and the arranged bamboo sticks and the covered spraying soil form an integrated cross-linked structure, which can effectively improve its stability and scouring resistance, reduce the damage of rainwater scouring to the protection of the strongly weathered sandstone roadbed slope, and ensure the survival rate of plants. The role of the chopped fiber a is to form a three-dimensional network structure in the soil during the spraying process, further improving the stability of the integrated cross-linked structure. At the same time, no seeds are configured in the spraying soil a2.

[0067] The above embodiments can be selected according to the construction period and the expected effect. Generally speaking, the second embodiment is more suitable for spraying grass protection on the slopes of strongly weathered sandstone roadbed. The first embodiment can reduce the construction steps and improve construction efficiency. The third embodiment can reduce the cost of seeds, but will reduce the density of plant coverage.

[0068] S7, slope water spraying and infiltration.

[0069] S8: Insert thin bamboo sticks. The bamboo sticks are evenly spaced at a density of 5 to 10 per square meter, with 5 to 10 cm of bamboo sticks exposed.

[0070] S9, spray seeding, use a sprayer to mix the second mixed spray soil with the anchor pot, and then spray it onto the slope. The spraying thickness is 4~6cm.

[0071] S10, covered with straw mats and geonet.

[0072] S11, remove the straw mat and geonet after the grass takes root.

[0073] Among them, steps S10 to S11 can be selected according to actual needs. By mixing the anchor pot and the spraying soil, a relatively stable integrated cross-linked structure can be obtained, which can effectively improve its stability and anti-scouring properties.

[0074] like Figure 3 and 4 As shown, the anchoring pot body includes a cubic outer frame 1, each surface of which has an opening 11, wherein the two sides of each surface deviating from the opening 11 are respectively defined as a first mounting surface 12 and a second mounting surface 13, a plurality of hooks 2 are respectively provided on the first mounting surface 12 and the second mounting surface 13, and a diaphragm 3 with a through hole 31 is provided at the opening 11, and the above-mentioned second mixed spraying soil is filled inside the cubic outer frame 1.

[0075] The barbs 2 are randomly arranged and cover the first mounting surface 12 and the second mounting surface 13 respectively. The size of the anchoring pot is adapted to the specification of the sprayer. In addition, the anchoring pot is made of biodegradable plastic.

[0076] The diaphragm 3 is made of butylene terephthalate or polycaprolactone, which has elasticity. The spraying soil is injected into the interior by enlarging the through hole 31. After the injection is completed, the aperture of the through hole 31 can be restored to its original state to a certain extent.

[0077] Among them, the through hole 31 is used to maintain the connection between the inside and outside of the anchor pot, so that the roots of the seeds can enter the strongly weathered sandstone roadbed slope and grow after germination, and can drill out of the anchor pot to the outside of the soil during the growth process.

[0078] The outer cubic frame 1 and the hooks 2 are made of polybutylene succinate or polyhydroxyalkanoate, and the anchoring bowl body made of biodegradable plastic can be gradually degraded in the soil to avoid damage to the environment.

[0079] The hook barb 2 includes a connecting portion connected to the outer frame 1 of the cube and a hook-shaped hooking portion. In order to avoid the anchoring pots from being hooked together before spraying as much as possible, the anchoring pots are separated as much as possible by mixing the spraying soil with the anchoring pot. At the same time, the mechanical force of the sprayer will also separate the anchoring pots during the spraying process. After the sprayer sprays the anchoring pot and the spraying soil onto the slope of the strongly weathered sandstone roadbed, the anchoring pots are connected to each other through the hook barb 2 during the movement of the anchoring pot. At the same time, the spraying soil will also play a fixing role. The movement of the anchoring pot includes displacement caused by rain erosion and impact on the slope. At the same time, the bamboo sticks provided can further fix the hooking result formed by the anchoring pot.

[0080] Compared with Example 1, the above-mentioned Example 2 adds an anchoring bowl structure. The anchoring bowl forms an interlocking cross-linked structure during the spraying process, which can achieve a better spraying effect compared with Example 1. Specifically, it can further increase the stability of the slope sprayed soil, reduce fluidity during rain erosion and spraying, and enhance the stability of the sprayed grass.

[0081] The technical solution adopted by the present invention uses a new fiber material to improve the effect of slope spraying. Bamboo sticks are used to increase the stability of the slope spraying soil. The fiber material is evenly mixed with the spraying soil to improve the overall bonding effect. Slope soaking can increase the bonding effect of the interface and reduce the problem of poor adhesion at the interface. The construction is convenient, simple and fast. The spraying machinery used is common, and the materials of the mixture are improved and readily available.

[0082] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for spraying grass to protect the side slope of a strongly weathered sandstone roadbed, characterized in that: The steps include: Prepare the spraying soil and mix it for the first time. After mixing, let the spraying soil stand for 0.5 to 2 days; Spray water on the strongly weathered sandstone slope and insert thin bamboo sticks at the same time, with 5cm~10cm of the sticks exposed; Use a sprayer to mix the above-mentioned spray soil evenly and spray it onto the slope with a thickness of 4-6 cm. Cover the surface of the slope after spraying with straw mats and geonets, and remove the straw mats and geonets after the grass takes root on the slope.

2. The method according to claim 1, wherein: The bamboo sticks are arranged at equal intervals at a density of 5 to 10 per square meter.

3. The method according to claim 1, wherein: The process of preparing the spray soil includes the following steps: Cutting the fiber material into short pieces of 5 to 15 cm in length to obtain chopped fibers a; The seeds, base soil, fertilizer, water retaining agent and chopped fiber a are mixed for the first time.

4. The method according to claim 1, wherein: The process of preparing the spray soil includes the following steps: Cut the fiber material into short pieces with a length of 0.2-0.5 cm to obtain chopped fibers b; Mix the seeds, base soil, fertilizer, water retaining agent and chopped fiber b for the first time.

5. The method according to claim 4, characterized in that: After the first mixing is completed and left to stand for 0.5 to 2 days, a second mixing is performed. After the mixing is completed, the spray soil is injected into the anchor pot.

6. The method according to claim 5, characterized in that: The anchoring pot body comprises a cubic outer frame (1), each surface of which has an opening (11), wherein the two sides of each surface deviating from the opening (11) are respectively defined as a first mounting surface (12) and a second mounting surface (13), a plurality of hooks (2) are respectively provided on the first mounting surface (12) and the second mounting surface (13), a diaphragm (3) with a through hole (31) is provided at the opening (11), and the second mixed spraying soil is filled inside the cubic outer frame (1).

7. The method according to claim 6, characterized in that: The barbs (2) are randomly arranged, and the barbs (2) cover the first mounting surface (12) and the second mounting surface (13) respectively.

8. The method according to any one of claims 5 to 7, characterized in that: The size of the anchor bowl is adapted to the specifications of the sprayer.

9. The method according to any one of claims 5 to 7, characterized in that: The anchor bowl is made of biodegradable plastic.

10. The method according to claim 5, characterized in that: The method further comprises the following steps: using a spraying machine to mix the second mixed spraying soil with the anchor pot, and then spraying the mixture onto the slope, with the spraying thickness being 4 to 6 cm.

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