A water-retaining planting bag for ecological vegetation restoration on steep rock slopes

Abstract

This utility model relates to the field of ecological vegetation restoration technology, specifically disclosing a water-retaining planting bag for ecological vegetation restoration on steep rock slopes. It aims to solve the problem of poor water retention and low vegetation survival rates caused by traditional planting bags on steep rock slopes due to the large angle and rapid water flow. The water-retaining planting bag consists of an outer planting bag and an inner water-retaining bag. This utility model achieves water retention through the inner water-retaining bag, continuously providing a moist environment for vegetation growth, significantly improving the survival rate of ecological vegetation restoration on steep rock slopes, while reducing daily maintenance costs. It is suitable for ecological vegetation restoration projects on various types of steep rock slopes.

Description

Technical Field

[0001] This utility model relates to the field of ecological environment restoration technology, and in particular to a water-retaining planting bag for ecological vegetation restoration on steep rock slopes. Background Technology During the construction of highways, railways, and mining projects, a large number of steep rock slopes are often formed. These slopes have exposed rocks, scarce soil, and fragile ecological environments. If vegetation is not restored in time, they can easily cause geological disasters such as soil erosion and landslides, thus disrupting the regional ecological balance.

[0002] Currently, the restoration of ecological vegetation on steep rock slopes often employs the method of "planting walls constructed by stacking soil-filled planting bags." This involves filling traditional planting bags with growing substrate and then stacking the bags on the rock slope according to a certain pattern to provide a substrate for vegetation growth. However, traditional planting bags have significant drawbacks: steep rock slopes typically have an angle greater than 60°, resulting in rapid water flow during rain or artificial watering. Traditional planting bags rely solely on the absorbency of their fabric to retain water, leading to extremely poor water retention. Water is quickly lost along the slope, causing the growing substrate inside the planting bags to dry out rapidly. Furthermore, vegetation seedlings have high water requirements in their early growth stages and are highly susceptible to wilting and death in water-scarce environments. Consequently, the survival rate of restored vegetation on slopes is generally below 40%, wasting significant human and material resources and failing to achieve the expected ecological restoration effects. In addition, frequent artificial watering is required to maintain vegetation survival, significantly increasing daily maintenance costs. Therefore, developing a planting bag that can effectively retain water, improve vegetation survival rate, and reduce maintenance costs in the environment of steep rock slopes has become an urgent problem to be solved in the field of ecological vegetation restoration of steep rock slopes. Utility Model Content The purpose of this invention is to overcome the shortcomings of traditional planting bags in the prior art, such as poor water retention, low vegetation survival rate, and high maintenance cost when used on steep rock slopes, and to provide a water-retaining planting bag for ecological vegetation restoration on steep rock slopes. To achieve the above objectives, the present invention adopts the following technical solution: A water-retaining planting bag for ecological vegetation restoration on steep rock slopes includes an outer planting bag and a water-retaining inner bag. The water-retaining inner bag is placed inside the outer planting bag and has a water-retaining layer that can store rainwater or artificial watering to continuously provide a moist environment for the growth substrate. On the outer planting bag, above the water-retaining layer of the inner water-retaining bag, there are plant growth holes with a diameter of 3-5 cm. This size ensures that the seedlings can grow smoothly while preventing the growth substrate from leaking out. On the inner water-retaining bag, above the water-retaining layer, there are air-permeable and water-collecting holes. These holes face the same direction as the plant growth holes, ensuring that rainwater or artificial watering can pass through the plant growth holes and the air-permeable and water-collecting holes to enter the water-retaining layer for storage. At the same time, it ensures the air permeability of the growth substrate and prevents the plant roots from rotting due to lack of oxygen. Furthermore, the water-retaining inner bag can be installed flexibly. It can be pre-inserted into the outer planting bag during the factory production process, reducing on-site construction steps and improving construction efficiency; or it can be inserted into the planting bag during on-site construction according to actual needs. Furthermore, the water-retaining inner bag uses commercially available plastic film bags, which can store a large amount of water and provide a moist environment for the growth substrate for a long time, reducing the frequency of watering even in dry weather. Furthermore, the outer planting bags are made of polypropylene geotextile, which can withstand the gravity of steep rock slopes and extend the service life of the planting bags. Furthermore, the plant growth holes are evenly distributed on the outer planting bag, with a spacing of 8-12 cm between adjacent plant growth holes. This ensures that the seedlings have sufficient space during growth and avoids competition for light, water, and nutrients due to overcrowding. The distribution density of the air-permeable and water-permeable collection holes on the inner water-retaining bag is consistent with the distribution density of the plant growth holes, ensuring that there is a corresponding air-permeable and water-permeable collection hole below each plant growth hole. This allows water to enter the water-retaining layer evenly, thereby uniformly moistening the growth substrate and promoting uniform plant growth.

[0003] Figure description, Figure description Figure 1 is a schematic diagram of the structure of the water-retaining planting bag. In the figure, 1 is the combination of the outer planting bag and the water-retaining inner bag, 2 is the air-permeable and water-collecting growth holes on the outer planting bag and the water-retaining inner bag, and 3 is the water-retaining and moisture-retaining layer. Detailed Implementation The present invention will be further described in detail below with reference to specific embodiments. Example 1: A water-retaining planting bag for ecological vegetation restoration of high-steep rock slope surfaces, comprising an outer planting bag and a water-retaining inner bag; the outer planting bag is sewn with polypropylene geotextile with a gram weight of 180 g / ㎡ and a breaking strength of 12 kN / m, with dimensions of 50 cm × 30 cm; the water-retaining inner bag uses a plastic film bag available in the market, with dimensions of 49 cm × 29 cm. The water-retaining inner bag is pre-fitted into the inner part of the outer planting bag during factory production. The thickness of the non-porous water-retaining layer of the water-retaining inner bag is 5 cm and is located below the water-retaining layer. In the upper area of the outer planting bag, corresponding to the upper part of the water-retaining layer of the water-retaining inner bag, plant growth holes are opened. The aperture of the plant growth holes is 4 cm, the distance between adjacent holes is 10 cm, and a total of 6 are opened, evenly distributed in 2 rows and 3 columns; in the corresponding position in the upper area of the water-retaining inner bag, air-permeable, water-permeable and water-collecting holes are opened. The aperture of the air-permeable, water-permeable and water-collecting holes is 2 cm, the number is the same as that of the plant growth holes, and the orientation is the same, all facing upwards. During construction, the growth soil mixed with broadleaf grass, bermudagrass, tall fescue and Leucaena leucocephala is filled into the water-retaining planting bag. After filling, the bag mouth is tied tightly with a nylon rope; subsequently, the water-retaining planting bag is stacked on the rock slope surface with a slope of 70° in a "pin" shape with the plant growth holes and the air-permeable, water-permeable and water-collecting holes facing upwards. The stacking height is 5 m, and the planting bags are fixed with a wire mesh to prevent slipping.

[0004] When it rains or is watered artificially, the water enters the water-retaining layer successively through the plant growth holes of the outer planting bag and the air-permeable, water-permeable and water-collecting holes of the water-retaining inner bag. The water-retaining layer absorbs and stores the water; during the subsequent vegetation growth process, the water-retaining layer slowly releases the water, keeping the growth substrate continuously moist. After monitoring, the vegetation survival rate in this embodiment reaches more than 85%, which is significantly improved compared with the survival rate of 35% of the traditional planting bag, and the number of artificial water replenishment times per month is reduced from 5 times to 1 time, and the maintenance cost is reduced by 70%. Example 2: A water-retaining planting bag for ecological vegetation restoration of high-steep rock slope surfaces, which is different from Example 1 in that: the water-retaining inner bag is fitted into the inner part of the outer planting bag during on-site construction; the aperture of the plant growth holes of the outer planting bag is 3 cm, the distance between adjacent holes is 8 cm, and a total of 8 are opened; the water-retaining inner bag uses a plastic film bag available in the market, the aperture of the air-permeable, water-permeable and water-collecting holes of the water-retaining inner bag is 3 cm, and the growth substrate is mixed with broadleaf grass, bermudagrass, tall fescue, Leucaena leucocephala, etc. Constructed on a mine rock slope with a slope of 65°, the stacking height is 23 m. Through practice, the vegetation survival rate reaches 82%, the number of water replenishment times per month is reduced from 4 times to 1 time, the maintenance cost is reduced by 65%, and the landscape greening effect of the slope is improved after the vegetation grows out. (V) Utility model effects Significant water retention effect: This utility model stores water through the water-retaining layer of the inner bag, preventing rainwater or artificial watering from rapidly escaping on steep rock slopes, providing a continuous moist environment for the growth substrate, meeting the water needs of plant seedlings, and significantly improving the survival rate of vegetation. Compared with traditional planting bags, the survival rate is increased by 40%-50%. Reduced maintenance costs: The water-retaining layer can retain moisture for a long time, reducing the frequency of manual watering during dry weather. It can usually reduce the number of waterings per month from 4-5 times to once, significantly reducing the labor and water costs of daily maintenance, and reducing maintenance costs by 60%-70%. Highly adaptable: The outer planting bag is made of high-strength polypropylene geotextile, which is resistant to aging and corrosion and can adapt to the complex environment of steep rock slopes; the water-retaining inner bag has a flexible installation method, which can be prefabricated in the factory or installed on site, and the water-retaining material is environmentally friendly and biodegradable, which will not cause environmental pollution. It is suitable for ecological vegetation restoration projects of various steep rock slopes such as highways, railways, and mines. Promote uniform vegetation growth: The plant growth holes and aeration and water collection holes are evenly distributed to ensure that water enters the water-retaining layer evenly and moistens the growth substrate. At the same time, it ensures sufficient space for vegetation growth, avoids plant competition, promotes uniform and healthy vegetation growth, and enhances the ecological restoration effect.

Claims

1. A water-retaining planting bag for ecological vegetation restoration of high-steep rock surface slope, characterized in that, It includes an outer planting bag and a water-retaining inner bag; the water-retaining inner bag is fitted inside the outer planting bag and has a water-retaining layer for storing moisture; On the outer planting bag, plant growth holes are provided in the area above the water-retaining layer of the inner water-retaining bag, and the diameter of the plant growth holes is 3-5 cm; The water-retaining inner bag has a breathable and water-permeable collection hole in the area above the water-retaining layer, and the breathable and water-permeable collection hole of the water-retaining inner bag faces the same direction as the plant growth hole of the outer planting bag. The water-retaining planting bags are used to fill soil growth substrate mixed with various plants. After the bags are filled with soil, the opening can be tied tightly. When stacking the bags, they are arranged with the air-permeable and water-collecting holes and the plant growth holes facing upwards.

2. The water-retaining planting bag for ecological vegetation restoration on steep rock slopes according to claim 1, characterized in that, The water-retaining inner bag can be pre-inserted into the outer planting bag during factory production, or inserted into the outer planting bag during on-site construction.

3. The water-retaining planting bag for ecological vegetation restoration on steep rock slopes according to claim 1, characterized in that, The water-retaining layer of the inner water-retaining bag is made of commercially available plastic film bag.

4. The water-retaining planting bag for ecological vegetation restoration on steep rock slopes according to claim 1, characterized in that, The outer planting bag is made of polypropylene geotextile.

5. The water-retention planting bag for ecological vegetation restoration of high-steep rock surface slope according to claim 1, characterized in that, The plant growth holes are evenly distributed on the outer planting bag, with a spacing of 8-12 cm between two adjacent plant growth holes; the distribution density of the air-permeable and water-collecting holes on the water-retaining inner bag is consistent with the distribution density of the plant growth holes.

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