Bamboo tube type degradable slope re-greening geocell

Abstract

The application discloses a kind of degradable slope greenery restoration earthwork grid, including multiple bamboo tube units, biological base flexible connecting piece and slope anchoring piece;The bamboo tube unit is made of natural bamboo sawing;Multiple bamboo tube units are arranged in array mode to form grid or honeycomb structure, and are fixedly connected to the surface of slope by the slope anchoring piece;Adjacent bamboo tube units are fixedly connected together by the biological base flexible connecting piece;The gap between bamboo tube unit and adjacent bamboo tube unit is filled with guest soil base material, and cooperates with the seed of spray seeding plant to form ecological green layer.The bamboo tube unit made of natural bamboo and the biological base flexible connecting piece form honeycomb or net format structure, which is used for slope guest soil fixation and plant growth support, not only solves the problem of micro-plastic pollution and non-degradability of existing plastic earthwork grid, but also improves the efficiency of slope ecological restoration and long-term ecological stability.

Description

Technical Field

[0001] This invention relates to the field of ecological slope protection and vegetation restoration technology, and more specifically to a bamboo-tube type biodegradable geocell for slope revegetation. Background Technology

[0002] Currently, plastic geocells are widely used as surface reinforcement and topsoil stabilization structures for slopes in highway, railway, mining, water conservancy, and municipal engineering projects. Existing geocells are generally made of high-density polyethylene and other polymer materials welded together to form a honeycomb structure, which is then anchored to the slope surface and filled with planting soil for vegetation restoration.

[0003] While existing technologies can improve slope stability and promote vegetation growth to some extent, they still have the following drawbacks: 1. Environmental pollution: Plastic geocells, when exposed to ultraviolet radiation, rainwater, and temperature fluctuations for extended periods, are prone to aging and cracking, eventually forming microplastics that enter the soil and water, causing long-term pollution to the ecological environment. 2. Non-biodegradability: After the slope vegetation has formed, the plastic geocells remain in the natural environment for a long time, making it difficult to integrate with the ecosystem. 3. Poor ecological harmony: Plastic materials have poor harmony with the natural slope landscape, which is not conducive to the "near-natural" requirements of ecological restoration projects. 4. Post-construction maintenance issues: Aging plastic structures may experience cracking, warping, and other phenomena, affecting slope safety and landscape effects.

[0004] Therefore, there is an urgent need for a bamboo-tube-type biodegradable slope revegetation geocell that can replace traditional plastic geocells and has eco-friendly characteristics. Summary of the Invention

[0005] In view of this, the present invention provides a bamboo tube-type biodegradable slope revegetation geocell, the purpose of which is to solve the problems existing in the prior art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A bamboo-tube-type biodegradable slope revegetation geocell includes: multiple bamboo tube units, bio-based flexible connectors, and slope anchors; the bamboo tube units are made from natural bamboo sawn together; multiple bamboo tube units are arranged in an array to form a grid-like or honeycomb structure and are fixedly connected to the slope surface by the slope anchors; adjacent bamboo tube units are fixedly connected together by the bio-based flexible connectors; the gaps between the bamboo tube units and adjacent bamboo tube units are filled with topsoil substrate and plant seeds are sprayed to form an ecological revegetation layer.

[0007] Preferably, the length of the bamboo tube unit is 8 to 15 cm.

[0008] Preferably, the outer wall of the bamboo tube unit is provided with water-permeable cracks or openings to enhance the plant root penetration ability and water exchange ability.

[0009] Preferably, the surface of the bamboo tube unit is treated with carbonization, mildew prevention, or natural plant oil.

[0010] Preferably, the bamboo tube units are arranged in a hexagonal honeycomb arrangement, a matrix arrangement, or an irregular ecological arrangement.

[0011] Preferably, the bio-based flexible connector is one or more of bamboo strips, hemp rope, palm fiber rope, coconut fiber rope, and biodegradable fiber tape.

[0012] Preferably, the slope anchor is a bamboo anchor rod, bamboo nail, bamboo pile, or biodegradable ground nail.

[0013] Preferably, the bamboo tube unit is made of moso bamboo.

[0014] The present invention achieves the following technical effects compared to the prior art: 1) This invention uses natural bamboo and bio-based flexible connectors to form geocells, which can gradually degrade in the natural environment without causing microplastic pollution. Moreover, the materials do not need to be removed after natural degradation, which reduces the cost of later maintenance and treatment.

[0015] 2) This invention uses natural bamboo, which has good moisture absorption and breathability, which is conducive to the attachment, growth and moisture retention of plant roots. At the same time, the color of natural bamboo is in harmony with the natural environment, which can enhance the ecological landscape effect of the slope.

[0016] 3) The geocell structure of the present invention provides stable support in the early stage of vegetation restoration, and gradually degrades after the plant root system is formed, realizing the transition of the engineering structure to natural vegetation.

[0017] 4) Bamboo is abundant and inexpensive, making it suitable for large-scale applications in ecological restoration of mountainous areas, highways, and mines.

[0018] 5) This invention uses bamboo tube units made of natural bamboo to form a geocell structure through flexible connection. It can be adapted to the actual shape of the slope to improve the fit of the structure to the slope surface, so that the whole cell can better conform to the natural undulation of the slope, thereby enhancing the ability to intercept soil and the stability of the slope. At the same time, the bamboo tube units are connected by bio-based flexible connectors, so that the overall structure has a certain flexible deformation ability and can adapt to irregular slopes and complex landform conditions.

[0019] 6) This invention is applicable to highway slopes, railway slopes, mine ecological restoration, river ecological slope protection, sponge city ecological engineering, soil and water conservation engineering, and barren mountain revegetation projects. It is in line with the current development direction of "dual carbon" and "plastic-free ecological restoration" and has good industrialization prospects. Attached Figure Description

[0020] Figure 1 This is a three-dimensional view of a bamboo-tube type biodegradable slope revegetation geocell according to the present invention; Figure 2 This is a top view of a bamboo-tube type biodegradable slope revegetation geocell according to the present invention; Figure 3 This is a structural diagram of a bamboo tube unit; Figure 4 This is a schematic diagram of the application of a bamboo-tube type biodegradable slope revegetation geocell of the present invention to slope soil stabilization; In the diagram: 1. Bamboo tube unit; 2. Bio-based flexible connector; 3. Slope anchor; 4. Slope; 5. Topsoil substrate; 6. Vegetation. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1

[0023] Reference Figure 1-4 As shown, this invention discloses a bamboo-tube type biodegradable slope revegetation geocell, comprising: multiple bamboo tube units 1, bio-based flexible connectors 2, and slope anchors 3; the bamboo tube units 1 are made by sawing natural bamboo; the multiple bamboo tube units 1 are arranged in an array to form a grid-like or honeycomb structure, and are fixedly connected to the surface of the slope 4 by the slope anchors 3; adjacent bamboo tube units 1 are fixedly connected together by bio-based flexible connectors 2; the gaps between bamboo tube units 1 and adjacent bamboo tube units 1 are filled with topsoil substrate 5; plant seeds are sprayed on the topsoil substrate 5, the plant seeds grow into vegetation 6, and finally form an ecological revegetation layer.

[0024] The above technical solution uses bamboo tube units made of natural bamboo to form a geocell structure through flexible connection. It can be adapted to the actual shape of the slope. For example, when there are local depressions or areas of soil erosion on the slope, longer bamboo tube units can be selected for local compensation to improve the fit of the structure to the slope. This allows the geocell as a whole to better conform to the natural undulation of the slope, thereby enhancing the ability to intercept soil and the stability of the slope. At the same time, the bamboo tube units are connected by bio-based flexible connectors, which gives the overall structure a certain degree of flexible deformation ability and can adapt to irregular slopes and complex landform conditions.

[0025] In this embodiment, the length of the bamboo tube unit 1 is 8 to 15 cm; preferably, the length of the bamboo tube unit 1 is 10 cm.

[0026] In this embodiment, the outer wall of the bamboo tube unit 1 is provided with water-permeable cracks or openings to enhance the plant roots' ability to penetrate and exchange water.

[0027] In this embodiment, the surface of the bamboo tube unit 1 is treated with carbonization, mildew prevention, or natural plant oil to improve the early durability of the bamboo tube unit; specifically, the bamboo tube unit 1 is made of carbonized bamboo.

[0028] In this embodiment, the bamboo tube units 1 are arranged in a hexagonal honeycomb arrangement, a matrix arrangement, or an irregular ecological arrangement.

[0029] In this embodiment, the bio-based flexible connector 2 is one or more of bamboo strips, hemp rope, palm fiber rope, coconut fiber rope, and biodegradable fiber tape; specifically, the bio-based flexible connector 2 is bound with a composite of hemp rope and coconut fiber rope.

[0030] In this embodiment, the slope anchor 3 is a bamboo anchor rod, bamboo nail, bamboo pile, or biodegradable ground nail.

[0031] In this embodiment, the bamboo tube unit 1 is made of moso bamboo. Natural moso bamboo itself has a natural morphological characteristic of gradually decreasing diameter from the root to the tip, usually showing that the root is thicker, the tip is thinner, and the middle part is smoothly transitioned. This invention makes full use of this natural size variation law, and according to the stress requirements of different areas of the slope and the slope shape, bamboo tube units of different diameters are reasonably arranged to form an ecological cell system with staggered size.

[0032] In this embodiment, the bamboo tube unit 1, the bio-based flexible connector 2, and the slope anchor 3 can be made from waste materials generated during the traditional bamboo industry. The traditional bamboo industry typically generates a large amount of waste during processing, such as bamboo nodes. These materials are often treated as low-value waste because they are difficult to meet the requirements of traditional bamboo product processing. This invention directly uses the aforementioned waste materials generated during traditional bamboo industry processing, such as bamboo nodes, in the fabrication of geocells, achieving efficient resource utilization of bamboo waste. This not only reduces raw material costs but also improves the comprehensive utilization rate of bamboo, resulting in good ecological and economic benefits, and aligning with the development direction of green, low-carbon, and circular economy.

[0033] In this embodiment, the topsoil substrate 5 comprises planting soil, organic fiber, plant seeds, water-retaining agent, binder, organic fertilizer, and microbial inoculant. During the hydroseeding process, a portion of the topsoil substrate fills the inside of the bamboo tubes, while the other portion covers the spaces between the bamboo tubes to form a continuous planting layer, thus creating an integrated ecological structure between the bamboo tube unit 1 and the topsoil layer. Because the bamboo tube unit itself has a naturally hollow structure, it can form micro-planting cavities after hydroseeding, effectively storing topsoil, water, and nutrients. Compared to traditional plastic grid structures that only provide surface restraint, the bamboo tube structure in this invention can simultaneously perform multiple ecological functions, including soil stabilization, water storage, fertilizer retention, and root guidance.

[0034] In this embodiment, the microcavities formed inside the bamboo tube unit can significantly improve the roughness and porosity of the slope surface. Under rainfall conditions, this slows down the slope runoff velocity and enhances rainwater infiltration, thereby reducing soil erosion. Simultaneously, bamboo naturally possesses a certain degree of hygroscopicity, absorbing some moisture after rainfall and slowly releasing it under drought conditions, which helps improve the moisture retention capacity during plant germination. This significantly improves the problem of large-scale seed death due to slope water loss after germination, a common issue in traditional hydroseeding projects.

[0035] In this embodiment, the plant roots can rapidly extend along the gaps in the bamboo tubes and the surface of the bamboo material during growth, gradually penetrating the topsoil layer inside the bamboo tubes to form a three-dimensional interwoven root network. Over time, the bamboo tube material gradually undergoes natural degradation, and its degraded organic matter is further transformed into soil humus, improving slope soil fertility and microbial activity, thereby achieving a gradual evolution from artificial support structures to a natural plant slope stabilization system. Therefore, this invention not only solves the problems of traditional plastic geocells being difficult to degrade and prone to microplastic pollution, but also improves the efficiency of slope ecological restoration and long-term ecological stability through the synergistic effect of the bamboo tube structure and topsoil spraying.

[0036] In this embodiment, the geocell of the present invention can be prefabricated in the form of rolls, sheets or modular structures, which facilitates transportation and construction; specifically, the geocell is prefabricated as a rollable mesh, which is transported to the construction site and then unfolded and laid.

[0037] In this embodiment, the degradation cycle of the geocell of the present invention is 2 to 5 years, which matches the vegetation formation cycle of the slope.

[0038] In some other embodiments, the bamboo tube unit 1 can also be made of natural bamboo materials such as bamboo or nan bamboo.

[0039] Example 2

[0040] The construction method of the bamboo-tube type biodegradable slope revegetation geocell of the present invention: Step 1: Select natural bamboo with a diameter of 5-12 cm, cut it into 10 cm lengths, and make bamboo tube unit 1; Step 2: Using bamboo strips as bio-based flexible connectors 2, multiple bamboo tube units 1 are tied together horizontally and vertically to form a honeycomb-shaped cell structure. Step 3: After laying the honeycomb-shaped cell structure on the slope surface, fix it with bamboo anchor rods; Step 4: Spray the topsoil substrate 5, which is a mixture of planting soil, grass seeds, organic fiber, water-retaining agent and fertilizer, into the bamboo tube unit 1 and the gaps between adjacent bamboo tube units 1.

[0041] After construction, the bamboo tube structure initially serves to prevent soil erosion, plant roots penetrate the bamboo tubes in the middle stage to form a natural slope stabilization system, and the bamboo gradually degrades and integrates into the soil ecosystem in the later stage.

[0042] This invention is applicable to highway slopes, railway slopes, mine ecological restoration, river ecological slope protection, sponge city ecological engineering, soil and water conservation engineering, and barren mountain revegetation projects. It is in line with the current development trend of "dual carbon" and "plastic-free ecological restoration" and has good industrialization prospects.

[0043] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A bamboo-tube type biodegradable geocell for slope revegetation, characterized in that, include: Multiple bamboo tube units (1), bio-based flexible connectors (2), and slope anchors (3); the bamboo tube units (1) are made by sawing natural bamboo; multiple bamboo tube units (1) are arranged in an array to form a grid or honeycomb structure and are fixedly connected to the slope (4) surface by the slope anchors (3); adjacent bamboo tube units (1) are fixedly connected together by the bio-based flexible connectors (2); the gaps between the bamboo tube units (1) and adjacent bamboo tube units (1) are filled with topsoil substrate (5) and plant seeds are sprayed to form an ecological greening layer.

2. The bamboo-tube type biodegradable slope revegetation geocell according to claim 1, characterized in that, The length of the bamboo tube unit (1) is 8 to 15 cm.

3. The bamboo-tube type biodegradable slope revegetation geocell according to claim 1, characterized in that, The outer wall of the bamboo tube unit (1) is provided with water-permeable cracks or openings to enhance the plant roots’ ability to penetrate and exchange water.

4. The bamboo-tube type biodegradable slope revegetation geocell according to claim 1, characterized in that, The surface of the bamboo tube unit (1) is carbonized or treated with natural plant oil.

5. The bamboo-tube type biodegradable slope revegetation geocell according to claim 1, characterized in that, The bamboo tube units (1) are arranged in a hexagonal honeycomb arrangement, a matrix arrangement, or an irregular ecological arrangement.

6. The bamboo-tube type biodegradable slope revegetation geocell according to claim 1, characterized in that, The bio-based flexible connector (2) is one or more of bamboo strips, hemp rope, palm fiber rope, and coconut fiber rope.

7. The bamboo-tube type biodegradable slope revegetation geocell according to claim 1, characterized in that, The slope anchor (3) is a bamboo anchor rod, bamboo nail or bamboo pile.

8. The bamboo-tube type biodegradable slope revegetation geocell according to claim 1, characterized in that, The bamboo tube unit (1) is made of moso bamboo.

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