Degradable slope protection vegetation geotextile and preparation method thereof

Abstract

The invention discloses degradable slope protection vegetation geotextile and a preparation method. The degradable slope protection vegetation geotextile comprises two layers of double-sided degradable biological geotextile and concrete arranged between the two layers of double-sided degradable biological geotextile; the double-sided degradable biological geotechnical cloth comprises two layers of polylactic acid biopolymer geotechnical cloth and jute fiber bundles, and the jute fiber bundles penetrate through the two layers of polylactic acid biopolymer geotechnical cloth from top to bottom and are bound to form the double-sided degradable biological geotechnical cloth. The double-sided degradable biological geotextile forms a carrier, a better growth environment is provided for plants in the biochar vegetation concrete, the blended biochar vegetation concrete is uniformly poured in the middle of the double-sided degradable geotextile, and the purpose of uniformly reinforcing the side slope is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of geotextiles, and in particular to a degradable slope protection and vegetation geotextile and a preparation method thereof. Background Art

[0002] With the continuous development of my country's national infrastructure and the implementation of various construction projects, excavation slopes have gradually formed. To ensure the stability of the soil at the edge of the excavation area, existing technologies generally use simple grass planting and slope reduction, retaining walls, or skeleton protection or anchor bolt protection. These technical measures can overcome the serious soil erosion and disasters such as landslides and mud-rock flows caused by slopes, but they cannot achieve sustainable development.

[0003] In fact, with the continuous advancement of construction projects, geotextiles with a certain strength and greening function are needed in the protection of excavated slopes to be suitable for excavated slope protection projects. Existing technologies set up retaining walls or simply use vegetation greening and other measures to protect excavated slopes. However, the retaining walls required by these measures have high requirements on the bearing capacity of the slope ground foundation and are not suitable for high slopes. Simple vegetation slope protection technology has a weak effect on slope stability and cannot effectively solve the problem of soil erosion on the slope surface. The application of this technology is also subject to certain limitations and is only suitable for some relatively gentle slopes.

[0004] Therefore, in order to ensure the stability of the slope, it is necessary to adopt further engineering technology to stabilize and protect the slope, and to meet the existing engineering construction requirements and lower the maintenance cost in the later stage. In view of the environmental problems caused by the existing measures, it is urgent to develop a biodegradable slope protection vegetation geotextile and its preparation method. Summary of the Invention

[0005] (1) Technical issues to be resolved

[0006] The technical problem to be solved by the present invention is to provide a degradable slope protection vegetation geotextile and a preparation method. The double-sided degradable bio-geotextile is formed into a carrier to provide a better growth environment for the plants in the biochar vegetation concrete. The mixed biochar vegetation concrete is evenly poured in the middle of the double-sided degradable geotextile to achieve the purpose of uniform slope reinforcement.

[0007] (2) Technical solution

[0008] The solution adopted by the present invention to solve the above technical problems is a degradable slope protection vegetation geotextile, which includes two layers of double-sided degradable biological geotextiles and biochar vegetation concrete placed between the two layers of double-sided degradable biological geotextiles; the double-sided degradable biological geotextile includes two layers of polylactic acid biopolymer geotextiles and jute fiber bundles, and the double-sided degradable biological geotextile is formed by jute fiber bundles passing through two layers of polylactic acid biopolymer geotextiles and binding them from top to bottom.

[0009] In some embodiments, the polylactic acid biopolymer geotextile is formed by connecting polylactic acid fibers through a needle punching process.

[0010] Specifically, both polylactic acid fiber and jute fiber bundles are biodegradable, implementing the concept of environmental protection, green and sustainable development; after degradation, jute fiber can provide a good growth environment for plant growth and better achieve vegetation restoration.

[0011] By adopting the above scheme, the polylactic acid biopolymer geotextile can ensure the strength characteristics of the overall geotextile.

[0012] In some embodiments, the jute fiber bundles are passed through two layers of polylactic acid biopolymer geotextiles from top to bottom and tied at fixed points to form the double-sided degradable bio-geotextile.

[0013] In some embodiments, the jute fiber bundles pass through the polylactic acid biopolymer geotextile to form a plurality of fixed points on the polylactic acid biopolymer geotextile, and the plurality of fixed points are arranged in a matrix.

[0014] In some embodiments, a distance L is formed between any one of the fixed points and an adjacent one of the fixed points, and the range of L is 1m-2m.

[0015] By adopting the above solution, jute fiber bundles are passed through the polylactic acid biopolymer geotextile and tied at fixed points to form the double-sided degradable bio-geotextile, thereby ensuring the strength and stability of the double-sided degradable bio-geotextile.

[0016] In some embodiments, the double-sided biodegradable geotextile is impregnated with fungi required by plants before laying.

[0017] In some embodiments, the desired plant bacterial species includes Bacillus subtilis.

[0018] By adopting the above scheme, Bacillus subtilis is beneficial to plant growth and can act as a biological fertilizer, while promoting slope reinforcement; providing a better environment for plant growth and geotextile reinforcement.

[0019] In some embodiments, the biochar vegetation concrete is formed by mixing cement and coarse aggregate to form a base concrete, and plant seeds and a small amount of biochar are mixed into the base concrete.

[0020] Specifically, the biochar-vegetated concrete used for slope reinforcement and vegetation restoration contains the following raw materials in parts by weight: 25-30 parts of cement, 40-50 parts of coarse aggregate, 0.5-2 parts of plant seeds, and 1-5 parts of biochar.

[0021] In some embodiments, the plant seeds include pigeon pea seeds.

[0022] Using the above scheme, pigeon pea is a fast-growing shrub with a very developed root system, and the planting coverage rate can reach up to about 90%; as a protective plant, pigeon pea can not only fix the soil and reduce soil erosion, but its root nodules can also fix nitrogen and increase soil fertility, and the fallen leaves can improve the soil structure and increase the organic matter content; biochar can react with concrete to increase the strength of the concrete itself; the addition of biochar increases the strength of the vegetation concrete, and at the same time, biochar has good water retention and can be used as a soil conditioner to promote soil remediation and plant growth.

[0023] The solution adopted by the present invention to solve the above technical problems is a method for preparing a degradable slope protection vegetation geotextile, comprising the following steps:

[0024] (1) Preparation of double-sided biodegradable geotextile: polylactic acid fiber is needle-punched into polylactic acid biopolymer geotextile, and jute fiber bundles are used to pass through two layers of polylactic acid biopolymer geotextile from top to bottom to achieve fixed-point binding, forming a complete structure of the three parts;

[0025] (2) soaking the prepared double-sided biodegradable geotextile in a Bacillus subtilis solution;

[0026] (3) Preparation of biochar-based concrete: Cement, coarse aggregate, pigeon pea seeds and a small amount of biochar are mixed to form biochar-based concrete;

[0027] (4) Remove the pumice, loose layer, weeds, dead branches and leaves, garbage and other debris from the slope surface, lay the double-sided degradable bio-geotextile on the surface of the excavated slope, and form a 10cm-20cm overlap between adjacent double-sided degradable bio-geotextiles; form the double-sided degradable bio-geotextile into a carrier, and then evenly pour the mixed biochar vegetation concrete in the middle of the double-sided degradable geotextile. After the biochar vegetation concrete hardens, a degradable slope protection vegetation geotextile is formed.

[0028] By adopting the above scheme, the double-sided degradable bio-geotextile is formed into a carrier to provide a better growth environment for the plants in the biochar vegetation concrete. The mixed biochar vegetation concrete is evenly poured in the middle of the double-sided degradable geotextile to achieve the purpose of uniform slope reinforcement.

[0029] (3) Beneficial effects

[0030] Compared with the prior art, the present invention designs a degradable slope protection vegetation geotextile and a preparation method thereof.

[0031] (1) The polylactic acid fiber and jute fiber bundle used in the present invention are both degradable, implementing the concept of environmentally friendly, green and sustainable development; after degradation, the jute fiber can provide a good growth environment for plant growth, thereby better achieving vegetation restoration;

[0032] (2) The double-sided biodegradable geotextile of the present invention is formed by jute fiber bundles passing through two layers of polylactic acid biopolymer geotextile from top to bottom and tied at fixed points, and has a stable structure and high strength;

[0033] (3) The polylactic acid biopolymer geotextile of the present invention can ensure the strength characteristics of the entire geotextile;

[0034] (4) The Bacillus subtilis used in the present invention is beneficial to plant growth and can serve as a biological fertilizer. It can also promote slope reinforcement and provide a better environment for plant growth and geotextile reinforcement.

[0035] (5) The pigeon pea used in the present invention is a fast-growing shrub with a very developed root system. The planting coverage rate can reach up to about 90%. As a protective plant, the pigeon pea can not only fix the soil and reduce soil erosion, but its root nodules can also fix nitrogen and increase soil fertility. The fallen leaves can improve the soil structure and increase the organic matter content. Biochar can react with concrete to increase the strength of the concrete itself. The addition of biochar increases the strength of the vegetation concrete. At the same time, biochar has good water retention and can be used as a soil conditioner to promote soil remediation and plant growth.

[0036] (6) The present invention adopts needle punching technology, which can easily realize the mass production of double-sided biodegradable geotextiles, reduce production costs and improve production efficiency;

[0037] (7) The present invention forms a double-sided degradable bio-geotextile into a carrier to provide a better growth environment for the plants in the biochar vegetation concrete. The mixed biochar vegetation concrete is evenly poured in the middle of the double-sided degradable geotextile to achieve the purpose of uniform slope reinforcement. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0039] Figure 1 Schematic diagram of the cross-sectional structure of a degradable slope protection vegetation geotextile of the present invention;

[0040] Figure 2 It is a schematic diagram of the planar structure of the double-sided degradable bio-geotextile of the present invention.

[0041] The names of the components corresponding to the various reference numerals in the figure are: 1. Double-sided degradable bio-geotextile; 1-1. Polylactic acid biopolymer geotextile; 1-2. Jute fiber bundle; 2. Biochar vegetation concrete. DETAILED DESCRIPTION

[0042] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0044] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0045] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0046] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0047] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples, however, one skilled in the art will appreciate that the examples can be practiced without these specific details.

[0048] The following describes the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0049] like Figure 1-Figure 2 As shown, the present invention provides a degradable slope protection and vegetation geotextile, which includes two layers of double-sided degradable bio-geotextiles 1 and a biochar vegetation concrete 2 placed between the two layers of the double-sided degradable bio-geotextiles 1. The double-sided degradable bio-geotextiles 1 include two layers of polylactic acid biopolymer geotextiles 1-1 and jute fiber bundles 1-2, and the double-sided degradable bio-geotextiles 1 are formed by tying the jute fiber bundles 1-2 from top to bottom through the two layers of polylactic acid biopolymer geotextiles 1-1. In some embodiments, the polylactic acid biopolymer geotextile 1-1 is formed by connecting polylactic acid fibers through a needle punching process. Specifically, the polylactic acid fibers and jute fiber bundles 1-2 are both degradable, implementing the concept of environmentally friendly, green and sustainable development. After degradation, the jute fibers can provide a good growth environment for plant growth, better achieving vegetation restoration. Using the above solution, the polylactic acid biopolymer geotextile 1-1 can ensure the strength characteristics of the entire geotextile.

[0050] In some embodiments, the jute fiber bundles 1-2 are passed through two layers of polylactic acid biopolymer geotextile 1-1 from top to bottom and tied at fixed points to form the double-sided degradable bio-geotextile 1. In some embodiments, the jute fiber bundles 1-2 pass through the polylactic acid biopolymer geotextile 1-1 to form a plurality of fixed points on the polylactic acid biopolymer geotextile 1-1, and the plurality of fixed points are arranged in a matrix. In some embodiments, a spacing L is formed between any one of the fixed points and its adjacent fixed point, and the range of L is 2m. Using this arrangement, the jute fiber bundles 1-2 are passed through the polylactic acid biopolymer geotextile 1-1 and tied at fixed points to form the double-sided degradable bio-geotextile 1, ensuring the strength and stability of the double-sided degradable bio-geotextile 1.

[0051] In some embodiments, the double-sided biodegradable geotextile 1 is impregnated with a desired bacterial species for plants before installation. In some embodiments, the desired bacterial species for plants includes Bacillus subtilis. Using this solution, Bacillus subtilis is beneficial to plant growth, acting as a biofertilizer and promoting slope reinforcement, providing a better environment for plant growth and geotextile reinforcement.

[0052] In some embodiments, the biochar-vegetated concrete 2 is formed by mixing cement and coarse aggregate to form a base concrete, and plant seeds and a small amount of biochar are mixed into the base concrete. Specifically, the biochar-vegetated concrete 2 used for slope reinforcement and vegetation restoration contains the following raw materials, in parts by weight: 25-30 parts cement, 40-50 parts coarse aggregate, 0.5-2 parts plant seeds, and 1-5 parts biochar. In some embodiments, the plant seeds include pigeon pea seeds. Using this solution, pigeon pea is a fast-growing shrub with a well-developed root system, and its planting coverage can reach up to approximately 90%. As a protective plant, pigeon pea can stabilize soil and reduce soil erosion, while its nodules can fix nitrogen and increase soil fertility, and its fallen leaves can improve soil structure and increase organic matter content. Biochar can react with concrete, increasing its strength. The addition of biochar improves the strength of the vegetated concrete. At the same time, biochar has excellent water retention properties and can act as a soil conditioner, promoting soil remediation and plant growth.

[0053] The present invention provides a method for preparing a degradable slope protection vegetation geotextile, comprising the following steps:

[0054] (1) preparing a double-sided biodegradable bio-geotextile 1: needle-punching polylactic acid fibers into a polylactic acid biopolymer geotextile 1-1, and using jute fiber bundles 1-2 to pass through two layers of the polylactic acid biopolymer geotextile 1-1 from top to bottom to achieve fixed-point tying, thereby forming a complete structure of the three parts;

[0055] (2) soaking the prepared double-sided biodegradable geotextile 1 in a Bacillus subtilis solution;

[0056] (3) Preparation of biochar-based concrete 2: Cement, coarse aggregate, pigeon pea seeds and a small amount of biochar are mixed to form biochar-based concrete 2;

[0057] (4) Remove the pumice, loose layer, weeds, dead branches and leaves, garbage and other debris from the slope surface, and lay the double-sided degradable bio-geotextile 1 on the surface of the excavated slope, with a 20cm overlap between adjacent double-sided degradable bio-geotextiles 1; form the double-sided degradable bio-geotextile 1 into a carrier, and then evenly pour the mixed biochar vegetation concrete 2 in the middle of the double-sided degradable geotextile. After the biochar vegetation concrete 2 hardens, a degradable slope protection vegetation geotextile is formed. Using the above scheme, the double-sided degradable bio-geotextile 1 is formed into a carrier to provide a better growth environment for the plants in the biochar vegetation concrete 2. The mixed biochar vegetation concrete 2 is evenly poured in the middle of the double-sided degradable geotextile, achieving the purpose of uniform slope reinforcement.

[0058] Wherein, the concentration of the Bacillus subtilis solution is OD600=1.0.

[0059] The following is a specific application scenario of the double-sided degradable bio-geotextile 1 of the present invention, but it is not limited to this: the double-sided degradable bio-geotextile 1 is transported from the factory to the excavated slope. Before laying the double-sided degradable bio-geotextile 1, the soil slope is cleared, leveled, and rolled. When laying begins, the double-sided degradable bio-geotextile 1 is spread out manually, and all vehicles and machines are strictly prohibited from passing directly on the geotextile. When laying the geotextile, care should be taken to keep it close to the slope surface, and the seams of the geotextile should be overlapped to enhance the slope protection effect. The mixed biochar vegetation concrete 2 is evenly poured in the middle of the double-sided degradable bio-geotextile 1, and the biochar vegetation concrete 2 is hardened to achieve the purpose of slope reinforcement.

[0060] The same or similar parts between the various embodiments in this specification can be referred to each other, and each embodiment focuses on the differences from other embodiments.

[0061] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A degradable slope protection geotextile, characterized by: The degradable slope protection vegetation geotextile comprises two layers of double-sided degradable bio-geotextile (1) and concrete placed between the two layers of the double-sided degradable bio-geotextile (1); the double-sided degradable bio-geotextile (1) comprises two layers of polylactic acid biopolymer geotextile (1-1) and jute fiber bundles (1-2), and the double-sided degradable bio-geotextile (1) is formed by tying the jute fiber bundles (1-2) from top to bottom through the two layers of polylactic acid biopolymer geotextile (1-1).

2. The degradable slope protection and vegetation geotextile according to claim 1, characterized in that: The concrete comprises biochar-grown concrete (2).

3. The degradable slope protection and vegetation geotextile according to claim 1, characterized in that: The polylactic acid biopolymer geotextile (1-1) is formed by connecting polylactic acid fibers through a needle punching process.

4. The degradable slope protection geotextile according to claim 1, characterized in that: The jute fiber bundles (1-2) are passed through two layers of polylactic acid biopolymer geotextiles (1-1) from top to bottom and tied at fixed points to form the double-sided degradable biogeotextile (1).

5. The degradable slope protection and vegetation geotextile according to claim 4, characterized in that: The jute fiber bundles (1-2) pass through the polylactic acid biopolymer geotextile (1-1), forming a plurality of fixed points on the polylactic acid biopolymer geotextile (1-1), and the plurality of fixed points are arranged in a matrix.

6. The degradable slope protection and vegetation geotextile according to claim 5, characterized in that: A distance L is formed between any one of the fixed points and an adjacent one of the fixed points, and the range of L is 1m-2m.

7. The degradable slope protection and vegetation geotextile according to claim 1, characterized in that: The double-sided degradable bio-geotextile (1) is impregnated with bacterial species required by plants before being laid; and the bacterial species required by plants include Bacillus subtilis.

8. The degradable slope protection geotextile according to claim 2, characterized in that: The biochar vegetation concrete (2) is prepared by mixing cement and coarse aggregate to form base concrete, and plant seeds and a small amount of biochar are mixed into the base concrete.

9. The degradable slope protection and vegetation geotextile according to claim 8, characterized in that: The plant seeds include pigeon pea seeds.

10. A method for preparing a degradable slope protection geotextile, characterized by: The following steps are involved: (1) preparing a double-sided biodegradable bio-geotextile (1): needle-punching polylactic acid fibers into a polylactic acid biopolymer geotextile (1-1), and using jute fiber bundles (1-2) to pass through two layers of the polylactic acid biopolymer geotextile (1-1) from top to bottom to achieve fixed-point tying, thereby forming a complete structure of the three parts; (2) soaking the prepared double-sided biodegradable geotextile (1) in a Bacillus subtilis solution; (3) preparing biochar-vegetated concrete (2): mixing cement, coarse aggregate, pigeon pea seeds and a small amount of biochar to form biochar-vegetated concrete (2); (4) Remove the floating stones, loose layers, weeds, dead branches and leaves, garbage and other debris on the slope surface, lay the double-sided degradable bio-geotextile (1) on the surface of the excavated slope, and form a 10cm-20cm overlap between adjacent double-sided degradable bio-geotextiles (1); form the double-sided degradable bio-geotextile (1) into a carrier, and then evenly pour the mixed biochar vegetation concrete (2) in the middle of the double-sided degradable geotextile, and wait for the biochar vegetation concrete (2) to harden to form a degradable slope protection vegetation geotextile.

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