A method for protecting the side slope of a weathered sandstone roadbed by spraying and planting grass

Abstract

The application provides a kind of strong weathered sandstone roadbed slope's spray planting grass protection method, it is related to strong weathered sandstone roadbed slope planting grass protection technical field, including configuration spray soil, first mixing uniformity is carried out to the spray soil, after mixing uniformity is completed, spray soil is at rest;The strong weathered sandstone slope is sprayed and infiltrated, while inserting fine bamboo stick;After mixing uniformity is used to spray the spray soil, it is sprayed to the slope;The surface of the slope after spraying is covered with grass curtain and geonet, and after the grass is rooted on the slope, the grass curtain and geonet are removed, etc. Step, effectively solve the strong weathered sandstone slope's poor adhesion and dryness and other problems, the retention time of spray planting grass is long, reduces secondary or multiple repeated spraying, reduces the labor and mechanical cost of repeated construction, at the same time, the spraying effect is good, it is not easy to appear after spraying is washed by rain, water retention is good, guarantee the survival rate of plants, help the safety and stability of strong weathered sandstone roadbed slope.

Description

Technical Field

[0001] This invention relates to the field of grass planting protection technology for strongly weathered sandstone roadbed slopes, specifically to a method for hydroseeding and grass planting protection of strongly weathered sandstone roadbed slopes. Background Technology

[0002] Slope protection is a crucial measure for ensuring the stability and durability of roadbeds. There are many types of slope protection, which can be broadly categorized into structural protection, ecological protection, and comprehensive protection. With increasing demands for green and environmentally friendly practices, ecological and comprehensive slope protection are becoming more common. Directly sowing grass seeds or spraying a mixture of seeds, substrate, and adhesive is one of the most frequently used slope protection measures, suitable for gentle slopes (slope <1:1.5). This requires the use of water-retaining agents and non-woven fabric covering. For medium- to high slopes, a grid beam system combined with grass planting is used. Concrete grid beams divide the slope surface, and soil is filled and grass is planted within the grids. This method provides good protection for both rock and soil slopes.

[0003] Common arched frameworks require hydroseeding, and the hydroseeding methods vary greatly depending on the soil type. For rock slopes, the requirements and standards for the hydroseeding substrate are lower due to the strong integrity of the rock slope. However, for soil slopes, especially strongly weathered sandstone slopes, the degree of weathering is more severe and the cohesion of sand and gravel is poor, making it difficult to achieve adhesion of ordinary hydroseeding soil. Most of the hydroseeding soil is washed away after rainfall, resulting in the need for multiple hydroseeding sessions, which not only consumes a lot of manpower and machinery but also increases costs. Summary of the Invention

[0004] This invention provides a method for hydroseeding and planting grass to protect strongly weathered sandstone roadbed slopes, in order to solve the problems mentioned above.

[0005] In view of the above problems, the technical solution proposed by the present invention is as follows: A method for hydroseeding and planting grass to protect strongly weathered sandstone roadbed slopes includes the following steps: Prepare the hydroseeding soil by mixing it thoroughly for the first time. After mixing, let the hydroseeding soil stand for 0.5 to 2 days. Spray water to soak the strongly weathered sandstone slope, and at the same time insert thin bamboo sticks, with 5cm to 10cm of the bamboo sticks protruding. After mixing the above-mentioned soil with a hydroseeding machine, spray it onto the slope to a thickness of 4-6 cm. Cover the slope surface with straw mats and geonets after the grass has taken root on the slope, and then remove the straw mats and geonets.

[0006] To better realize the technical solution of the present invention, the following technical measures were also adopted.

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

[0008] Furthermore, the preparation process of hydroseeding soil includes the following steps: Cut the fibrous material into short sections of 5-15cm to obtain short fiber a; The seeds, base soil, fertilizer, water-retaining agent, and short-cut fiber a are mixed for the first time.

[0009] Furthermore, the preparation process of hydroseeding soil includes the following steps: The fiber material is cut into short sections of 0.2~0.5cm to obtain short fiber b; The seeds, base soil, fertilizer, water-retaining agent, and short-cut fiber b are mixed for the first time.

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

[0011] Furthermore, the anchoring bowl body includes a cubic outer frame, each surface of which has an opening, wherein the two sides of each surface away from the opening are defined as a first mounting surface and a second mounting surface, respectively. Multiple hooks are provided on the first mounting surface and the second mounting surface, and a membrane with through holes is provided at the opening. The aforementioned second-mixed sprayed 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 dimensions of the anchor bowl are adapted to the specifications of the hydroseeding machine.

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

[0015] Furthermore, the process also includes the following steps: after mixing the second batch of sprayed soil with the anchoring pot using a hydroseeding machine, spray it onto the slope to a thickness of 4-6 cm.

[0016] Compared with the prior art, the beneficial effects of the present invention are: (1) It effectively solves the problems of poor adhesion and dryness of strongly weathered sandstone slopes. The retention time of hydroseeding is long, reducing the need for secondary or multiple repeated hydroseeding and reducing the labor and machinery costs of repeated construction.

[0017] (2) The construction is fast and efficient to complete 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 on 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, the water retention is good, and the survival rate of plants is guaranteed.

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

[0020] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0021] Figure 1 This is a flowchart of Embodiment 1 of the method for hydroseeding and planting grass to protect strongly weathered sandstone roadbed slopes disclosed in this invention; Figure 2 This is a flowchart of Embodiment 2 of the hydroseeding and grass planting protection method for strongly weathered sandstone roadbed slopes disclosed in this invention; Figure 3 This is a schematic diagram of the structure 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. Cube outer frame; 11. Opening; 12. First mounting surface; 13. Second mounting surface; 2. Hook; 3. Diaphragm; 31. Through hole. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Example

[0024] like Figure 1 As shown, a method for hydroseeding and planting grass to protect strongly weathered sandstone roadbed slopes includes the following steps: S1, Material Preparation.

[0025] The materials include: seeds, substrate, fertilizer, water-retaining agent, and fiber materials, among which: Fiber materials, including but not limited to wheat straw and withered grass, are used to form a three-dimensional network structure in the soil, increasing the soil's shear and tensile strength, and reducing landslides and collapses on slopes and slopes caused by rainwater erosion or gravity. At the same time, the porous structure of the fibers can absorb water, prolonging the soil's moist time and providing water support for plant seed germination and seedling growth. Furthermore, when the fibers are mixed with the soil, they can absorb fertilizers or organic matter, slowing down nutrient loss and improving fertilizer utilization efficiency.

[0026] The substrate soil includes, but is not limited to, red clay and yellow clay, which are used as the main body of the hydroseeding substrate to provide the basic environment for plant growth.

[0027] The fertilizer is a common slow-release fertilizer or compound fertilizer, used to provide the nutrients needed for plant growth.

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

[0029] S2, short-cut fibers a are obtained by cutting fibrous materials such as wheat straw into short fibers.

[0030] The length range of chopped fiber a is 5~15cm. Chopped fiber a is obtained by cutting fibrous materials such as wheat straw and dry grass into lengths of 5~15cm.

[0031] In this embodiment, when using a hydroseeding machine to directly spray soil, the length of fiber material a is controlled to be 5~15cm.

[0032] S3 is a mixture of grass seeds, base soil, fertilizer, water-retaining agent, and short-cut fiber a.

[0033] S4, after the first mixing, let the mixture stand.

[0034] After obtaining the materials for the hydroseeding soil, mix the grass seeds, base soil, fertilizer, water-retaining agent, and short-cut fiber a for the first time. After mixing, let the hydroseeding soil stand for 0.5 to 2 days.

[0035] S5, put it into the hydroseeding machine and mix it evenly.

[0036] After letting the hydroseeding soil stand for 0.5 to 2 days, put the settled hydroseeding soil into the hydroseeding machine and mix it evenly.

[0037] S6, slope sprayed with water for soaking.

[0038] S7. Insert thin bamboo skewers, with the skewers spaced evenly at a density of 5 to 10 per square meter, and the skewers protruding 5cm to 10cm.

[0039] S8, hydroseeding: After mixing the above-mentioned hydroseeding soil with a hydroseeding machine, spray it onto the slope to a thickness of 4-6 cm.

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

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

[0042] like Figure 2 As shown, a method for hydroseeding and planting grass to protect strongly weathered sandstone roadbed slopes includes the following steps: S1, Material Preparation.

[0043] The materials include: seeds, substrate, fertilizer, water-retaining agent, and fiber materials, among which: Fiber materials, including but not limited to wheat straw and withered grass, are used to form a three-dimensional network structure in the soil, increasing the soil's shear and tensile strength, and reducing landslides and collapses on slopes and slopes caused by rainwater erosion or gravity. At the same time, the porous structure of the fibers can absorb water, prolonging the soil's moist time and providing water support for plant seed germination and seedling growth. Furthermore, when the fibers are mixed with the soil, they can absorb fertilizers or organic matter, slowing down nutrient loss and improving fertilizer utilization efficiency.

[0044] The substrate soil includes, but is not limited to, red clay and yellow clay, which are used as the main body of the hydroseeding substrate to provide the basic environment for plant growth.

[0045] The fertilizer is a common slow-release fertilizer or compound fertilizer, used to provide the nutrients needed for plant growth.

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

[0047] S2, short-cut fibers b are obtained by cutting fibrous materials such as wheat straw.

[0048] The length range of chopped fiber b is 0.2~0.5cm. Chopped fiber b is obtained by cutting fibrous materials such as wheat straw and dry grass into lengths of 0.2~0.5cm.

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

[0050] S3 is a mixture of grass seeds, base soil, fertilizer, water-retaining agent, and short-cut fiber b.

[0051] S4, after the first mixing, let the mixture stand.

[0052] S5. After the second mixing, inject the sprayed soil into the anchoring pot.

[0053] S6. Place the anchor bowl and the sprayed soil into the spraying machine and mix them evenly.

[0054] Steps S2 to S6 above can also be implemented according to another implementation step, defined as implementation step a, which includes the following steps: S2a, cut wheat straw, dry grass and other fibrous materials into short sections of 5-15cm to obtain chopped fiber a, and cut wheat straw, dry grass and other fibrous materials into short sections of 0.2-0.5cm to obtain chopped fiber b.

[0055] S3a, mix grass seeds, base soil, fertilizer, water-retaining agent and short-cut fiber a to obtain hydroseeding soil a1, and mix grass seeds, base soil, fertilizer, water-retaining agent and short-cut fiber b to obtain hydroseeding soil b.

[0056] S4a, mix the hydroseeding soil a1 and hydroseeding soil b separately for the first time. After the first mixing is completed, let the mixture stand for 0.5 to 2 days.

[0057] S5a, after standing, the sprayed soil a1 and sprayed soil b are mixed a second time. After the second mixing is completed, the sprayed soil b is injected into the anchoring pot.

[0058] S6a, put the above-mentioned anchoring bowl and sprayed soil a1 into the spraying machine and mix them evenly.

[0059] Steps S2 to S6 above can also be implemented according to another implementation step, defined as implementation step b, which includes the following steps: S2b, cut wheat straw, dry grass and other fibrous materials into short fibers a by cutting them into 5-15cm lengths, and cut wheat straw, dry grass and other fibrous materials into short fibers b by cutting them into 0.2-0.5cm lengths.

[0060] S3b, mix the base soil, fertilizer, water-retaining agent and short-cut fiber a to obtain hydroseeding soil a2, and mix grass seeds, base soil, fertilizer, water-retaining agent and short-cut fiber b to obtain hydroseeding soil b.

[0061] S4b, mix the hydroseeding soil a2 and hydroseeding soil b separately for the first time. After the first mixing is completed, let the mixture stand for 0.5 to 2 days.

[0062] S5b, after standing, the sprayed soil a2 and sprayed soil b are mixed a second time. After the second mixing is completed, the sprayed soil b is injected into the anchoring pot.

[0063] S6b, Place the above-mentioned anchoring bowl and sprayed soil a2 into the spraying machine and mix them evenly.

[0064] The differences between the three embodiments described above are as follows: In steps S2 to S6, short-cut fiber b is used instead of short-cut fiber a, and anchoring pots are used as the bearing container for the sprayed soil. The interconnection between the anchoring pots and the arrangement of bamboo sticks and the covering sprayed soil form an integrated cross-linked structure, which can effectively improve its stability and erosion resistance, reduce the damage of rainwater erosion to the slope of strongly weathered sandstone roadbed, and ensure the survival rate of plants.

[0065] In steps S2a to S6a, short-cut fibers b are used to partially replace short-cut fibers a. Short-cut fibers a and the material form sprayed soil a1, and short-cut fibers b and the material form sprayed soil b. Anchored pots are used as the carriers for the sprayed soil. The interconnection between the anchored pots and the bamboo sticks and the covering sprayed soil form an integrated cross-linked structure, which can effectively improve its stability and erosion resistance, reduce the damage of rainwater erosion to the slope of strongly weathered sandstone roadbed, and ensure the survival rate of plants. The role of short-cut fibers 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 contained in the sprayed soil a1, which can increase the density of plant cover.

[0066] In steps S2b to S6b, short-cut fibers b are used to partially replace short-cut fibers a. Short-cut fibers a and the material form sprayed soil a2, and short-cut fibers b and the material form sprayed soil b. Anchor bowls are used as the carriers for the sprayed soil. The interconnection between the anchor bowls and the bamboo sticks and the covering sprayed soil form an integrated cross-linked structure, which can effectively improve its stability and erosion resistance, reduce the damage of rainwater erosion to the slope of strongly weathered sandstone roadbed, and ensure the survival rate of plants. The role of short-cut fibers 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 placed in the sprayed soil a2.

[0067] The above embodiments can be selected according to the construction cycle and the expected effect. Generally speaking, the second embodiment is more suitable for spraying and planting grass to protect the slope 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 cover.

[0068] S7, slope sprayed with water for soaking.

[0069] S8. Insert thin bamboo skewers, with the skewers spaced evenly at a density of 5 to 10 per square meter, and the skewers protruding 5cm to 10cm.

[0070] S9, hydroseeding: After mixing the second batch of hydroseeding soil with the anchoring pot using a hydroseeding machine, the mixture is sprayed onto the slope to a thickness of 4-6 cm.

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

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

[0073] Among them, steps S10 to S11 can be selected for operation according to actual needs. By using the method of mixing the anchoring bowl and the sprayed soil, a relatively stable integrated cross-linked structure can be obtained, which can effectively improve its stability and erosion resistance.

[0074] like Figure 3 and 4 As shown, the anchoring bowl body includes a cubic outer frame 1, each of which has an opening 11. The two sides of each surface that are offset from the opening 11 are defined as a first mounting surface 12 and a second mounting surface 13, respectively. Multiple hooks 2 are provided on the first mounting surface 12 and the second mounting surface 13, and a membrane 3 with through holes 31 is provided at the opening 11. The above-mentioned second-mixed sprayed soil is filled inside the cubic outer frame 1.

[0075] The hooks 2 are randomly arranged and cover the first mounting surface 12 and the second mounting surface 13 respectively. The size of the anchor bowl is adapted to the specifications of the hydroseeding machine. In addition, the anchor bowl is made of biodegradable plastic.

[0076] The membrane 3 is made of butylene terephthalate or polycaprolactone and is elastic. The sprayed soil is injected into the interior by enlarging the through hole 31. After the injection is completed, the diameter 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 anchoring bowl, so that the roots can enter the strongly weathered sandstone roadbed slope to grow after the seeds germinate and can drill out of the anchoring bowl to the outside of the soil during the growth process.

[0078] The cubic outer frame 1 and the hooks 2 are made of polybutylene succinate or polyhydroxyalkanoate, and the anchoring bowl made of biodegradable plastic can gradually degrade in the soil, avoiding environmental damage.

[0079] The hook 2 includes a connecting part that connects to the outer cubic frame 1 and a hook-shaped hooking part. In order to avoid the anchor bowls from hooking together before spraying as much as possible, the anchor bowls are separated as much as possible by mixing the sprayed soil with the anchor bowls. At the same time, the mechanical force of the spraying machine will also separate the anchor bowls during the spraying process. After the spraying machine sprays the anchor bowls and sprayed soil onto the strongly weathered sandstone roadbed slope, the anchor bowls are connected to each other by the hook 2 during the movement of the anchor bowls. At the same time, the sprayed soil will also play a fixing role. The movement of the anchor bowls includes displacement caused by rainwater erosion and impact on the slope. In addition, the bamboo sticks can further fix the hooking result formed by the anchor bowls.

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

[0081] The technical solution adopted in this invention uses a new fiber material to improve the effect of hydroseeding on slopes. Bamboo sticks are used to increase the stability of the hydroseeded soil, and the fiber material is mixed evenly with the hydroseeded soil to improve the overall bonding effect. Soaking the slope further enhances the bonding effect at the interface, reducing problems such as poor interfacial bonding. The construction is convenient, simple, and fast, using common hydroseeding machinery, and the improved materials are readily available.

[0082] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for hydroseeding and planting grass to protect strongly weathered sandstone roadbed slopes, characterized in that, Includes the following steps: Prepare the hydroseeding soil by mixing it thoroughly for the first time. After mixing, let the hydroseeding soil stand for 0.5 to 2 days. Spray water to soak the strongly weathered sandstone slope, and then insert thin bamboo sticks. The bamboo sticks are arranged at equal intervals with a density of 5 to 10 sticks per square meter, and the bamboo sticks are exposed 5cm to 10cm. The preparation process of the hydroseeding soil includes the following steps: cutting the fiber material into short fibers b with a length of 0.2~0.5cm; mixing the seeds, base soil, fertilizer, water-retaining agent and short fibers b for the first time; after the first mixing is completed and left to stand for 0.5~2 days, a second mixing is also included; after the mixing is completed, the hydroseeding soil is injected into the anchoring pot; the anchoring pot includes a cubic outer frame (1), each of which has an opening (11) on each surface, wherein the two sides of each surface that deviate from the opening (11) are respectively defined as the first... A mounting surface (12) and a second mounting surface (13) are provided with multiple barbs (2) on the first mounting surface (12) and the second mounting surface (13) respectively. A membrane (3) with a through hole (31) is provided at the opening (11). The above-mentioned second-mixed sprayed soil is filled inside the cube outer frame (1). The barbs (2) are randomly arranged and cover the first mounting surface (12) and the second mounting surface (13) respectively. The barbs (2) include a connecting part connected to the cube outer frame (1) and a hook-shaped hooking part. After mixing the second batch of sprayed soil with the anchoring pot using a hydroseeding machine, spray it onto the slope to a thickness of 4-6 cm. During the spraying process of the hydroseeding machine, its mechanical force separates the anchor bowls. After the hydroseeding machine sprays the anchor bowls and the sprayed soil onto the slope of the strongly weathered sandstone roadbed, the anchor bowls are connected to each other by hooks (2) during the movement of the anchor bowls. The sprayed soil also plays a fixing role. At the same time, the thin bamboo sticks set up further fix the hook structure formed by the anchor bowls. Cover the slope surface with straw mats and geonets after the grass has taken root on the slope, and then remove the straw mats and geonets.

2. The method according to claim 1, characterized in that: The dimensions of the anchor bowl are compatible with the specifications of the hydroseeding machine.

3. The method according to claim 1, characterized in that: The anchor bowl is made of biodegradable plastic.

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