A windproof and sand-fixing geotextile based on EICP technology and its preparation method

Abstract

The invention discloses a windproof and sand-fixing geotextile based on EICP technology and a preparation method thereof. The windproof and sand-fixing geotextile consists of two layers of needle-punched geotextiles, a supply system placed between the two layers of needle-punched geotextiles, and a water-retaining film placed on the outer surface of the needle-punched geotextiles; the needle-punched geotextiles are made of degradable plant fibers and are formed by a needle-punching process; the supply system includes a main supply pipe, a supply pipe joint, a branch supply pipe, a butterfly joint and a supply plate; the branch supply pipe includes a plurality of branch supply pipe sections arranged along its axial direction, the branch supply pipe sections are connected to the main supply pipe through the supply pipe joint, and every two adjacent branch supply pipe sections are connected through a butterfly joint; the supply plate extends out of the cavity of the butterfly joint at both ends of the branch supply pipe in the radial direction; a gap is provided between the part of the supply plate located in the cavity and the inner wall of the butterfly joint; the water-retaining film is made of degradable plastic and is coated on the outer surface of the windproof and sand-fixing geotextile through a hot-dip coating process.

Description

Technical Field

[0001] The present invention relates to the technical field of small vulcanizing machines, and in particular to a windproof and sand-fixing geotextile based on EICP technology and a preparation method thereof. Background Art

[0002] Geotextiles are a key material for windbreaks and sand fixation. Directly covering the surface of sand, they prevent it from being lifted by the wind. Their low cost, quick installation, simple process, and significant effectiveness have led to their increasing use.

[0003] In fact, most existing geotextiles used for windbreaks and sand fixation are made of non-biodegradable synthetic fibers. While these geotextiles achieve windbreaks and sand fixation, they themselves pollute the environment. Furthermore, these geotextiles are unable to utilize the biosolidification process to consolidate and strengthen the sand, resulting in limited long-term effectiveness. Therefore, to address the shortcomings of conventional geotextiles, there is an urgent need for a biodegradable, pollution-free geotextile with a certain degree of biosolidification capability. Summary of the Invention

[0004] (1) Technical issues to be resolved

[0005] The technical problem to be solved by the present invention is to provide a wind-proof and sand-fixing geotextile based on EICP technology and a preparation method, which can be applied along transportation routes in desert areas or other key areas requiring wind-proof and sand-fixing. It relies on the coverage of the wind-proof and sand-fixing geotextile itself and uses EICP solidification technology to further reinforce the surrounding sand and soil to achieve the purpose of wind-proof and sand-fixing.

[0006] (2) Technical solution

[0007] The solution adopted by the present invention to solve the above technical problems is a windbreak and sand-fixing geotextile based on EICP technology, which is composed of two layers of needle-punched geotextiles, a supply system placed between the two layers of the needle-punched geotextiles, and a water-retaining film placed on the outer surface of any layer of the needle-punched geotextiles;

[0008] The needle-punched geotextile is made of degradable plant fibers and is formed by a needle-punching process.

[0009] The supply system includes a main supply pipe, a supply pipe joint, a branch supply pipe, a butterfly joint and a supply plate, and the main supply pipe and the branch supply pipe are connected to each other;

[0010] The branch supply pipe includes a plurality of branch supply pipe sections arranged along its axial direction. The branch supply pipe section close to the main supply pipe is connected to the main supply pipe via the supply pipe joint. Every two adjacent branch supply pipe sections are connected via a butterfly joint. The branch supply pipe section farthest from the main supply pipe is connected to a butterfly joint at one end away from the main supply pipe, and the end of the butterfly joint away from the main supply pipe is a closed end. A cavity is provided inside the butterfly joint so that the butterfly joint can penetrate the adjacent branch supply pipe section.

[0011] The cavity of the butterfly joint passes through both ends of the butterfly joint along the radial direction of the branch supply pipe; the supply plate is assembled in the cavity, and the supply plate extends out of the cavity of the butterfly joint along both ends of the radial direction of the branch supply pipe; and a gap is formed between the portion of the supply plate located in the cavity and the inner wall of the butterfly joint;

[0012] The water-retaining film is made of degradable plastic and is coated on the outer surface of the windproof and sand-fixing geotextile through a hot-dip process.

[0013] Specifically, each component of the replenishment system is made of polyadipate or polybutylene terephthalate (PBAT) plastic and is processed and formed by a thermoplastic process so that it can be used to add EICP replenishment fluid when solidifying sand in the initial stage of use, and can be naturally degraded in the later stage of use without causing pollution to the environment.

[0014] In some embodiments, the two ends of the butterfly joint located in the axial direction of the branch supply pipe extend outward along the axial direction of the branch supply pipe to form butterfly joint round tube ends, and the butterfly joint round tube ends are used to connect the branch supply pipe sections;

[0015] The two ends of the butterfly joint located in the radial direction of the branch supply pipe extend outward along the radial direction of the branch supply pipe to form butterfly joint wing ends, and the butterfly joint wing ends are provided with a plurality of cross-shaped slots connected in sequence along the axial direction of the branch supply pipe, and every two adjacent cross-shaped slots are connected;

[0016] The cross-section of the supply plate in the axial direction of the branch supply pipe is a plurality of cross-shaped structures connected in sequence, and the size of the cross-shaped slot is slightly larger than the outer contour size of the cross-shaped structure of the cross-section of the supply plate, so that a gap is formed between the supply plate and the cross-shaped slot, so that the EICP supply liquid can seep out from the gap between the wing end of the butterfly joint and the supply plate under the action of the pressure and liquid tension in the pipe and flow along the outer surface of the supply plate.

[0017] In some embodiments, the main supply pipe is connected to a plurality of branch supply pipes arranged at intervals along its axial direction, and each branch supply pipe is connected to a needle-punched geotextile at both upper and lower ends.

[0018] In some embodiments, the main supply pipe includes multiple main supply pipe sections arranged in sequence along its axial direction, and the supply pipe joint is a tee joint; every two adjacent main supply pipe sections are connected by the supply pipe joint, and the supply pipe joint is located at any radial end of the main supply pipe and is connected to a branch supply pipe.

[0019] In some embodiments, one end of the main supply pipe along its axial direction extends above the soil surface, and the end of the main supply pipe extending above the soil surface is provided with an opening for adding EICP supply fluid.

[0020] Specifically, the EICP feed solution includes soybean urease solution and salt solution, which are prepared in a ratio of 1:1; the salt solution can be a mixture of 0.2 mol / L urea solution and 0.2 mol / L calcium chloride solution in a ratio of 1:1.

[0021] In some embodiments, the supply system is fixed in position between two layers of needle-punched geotextiles; a degradable binding wire is used to pass through the two layers of needle-punched geotextiles up and down, avoiding the supply system, so that the two layers of needle-punched geotextiles are sewn together while limiting the position of the supply system.

[0022] Specifically, the degradable bundling wires are made of poly (butylene adipate) or poly (butylene terephthalate) (PBAT) fibers.

[0023] In some embodiments, the degradable plant fiber used in the needle-punched geotextile is palm fiber or pineapple leaf fiber to ensure good tolerance to high temperature in the application environment; the degradable plastic used in the water-retaining film is polyadipate or butylene terephthalate.

[0024] In some embodiments, the windproof and sand-fixing geotextile is a sheet-like structure as a whole and cannot be folded.

[0025] The solution adopted by the present invention to solve the above technical problems is a method for preparing a windproof and sand-fixing geotextile based on EICP technology, comprising the following steps:

[0026] (I) Preparation of needle-punched geotextile: using degradable tropical plant fiber as raw material, and processing it through a needle-punching process to form a needle-punched geotextile;

[0027] (II) Preparation of various components of the supply system: using biodegradable plastic as raw material, processing them into main supply pipes, supply pipe joints, branch supply pipe sections, butterfly joints and supply plates through a thermoplastic process;

[0028] (III) The supply plate is passed through the two butterfly joint wing ends of the butterfly joint, and the two ends of the supply plate extend a certain length; the branch supply pipe sections and the butterfly joints are mechanically connected one by one; one end of a branch supply pipe section located at both ends of the branch supply pipe extends a certain length beyond the needle-punched geotextile, and the end extending beyond the needle-punched geotextile is connected to the main supply pipe through a supply pipe joint; the branch supply pipe section at the other end is connected to a butterfly joint, and the end of the butterfly joint away from the main supply pipe is sealed by hot melt bonding;

[0029] (IV) Laying the connected supply system on a layer of needle-punched geotextile, covering the supply system with another layer of needle-punched geotextile, and using degradable binding fibers to sew binding fibers up and down through the slightly concave area of ​​the top layer of needle-punched geotextile to connect the two layers of needle-punched geotextile together;

[0030] (V) A coating liquid is made from degradable plastic as a raw material and is coated on the outer surface of the windbreak and sand-fixing geotextile through a hot-dip coating process to form a water-retaining film.

[0031] In some embodiments, in step (IV), the supply system is fixed within the two layers of needle-punched geotextiles, and is simultaneously connected by bundling fibers passing up and down to connect the two layers of needle-punched geotextiles;

[0032] After the completion of step (V), the wind-proof and sand-fixing geotextile is in a sheet-like structure as a whole and cannot be folded; after being transported to the construction site and laid, the exposed ends of the branch supply pipes of a row of several wind-proof and sand-fixing geotextiles are mechanically connected to the main supply pipe section through a three-way joint using a supply pipe joint, so that the main supply pipe is connected to multiple wind-proof and sand-fixing geotextiles in parallel, and then the soil is covered and pressed, and the end of the main supply pipe is kept above the soil surface for adding EICP supply liquid.

[0033] (3) Beneficial effects

[0034] Compared with the existing technology, the present invention designs a windbreak and sand fixation geotextile based on EICP technology and its preparation method.

[0035] (1) The windbreak and sand-fixing geotextile based on EICP technology of the present invention is a new type of environmentally friendly engineering material. Tropical plant fibers are used as the raw materials of the needle-punched geotextile, and degradable plastics are used as the raw materials of the supply system. The entire windbreak and sand-fixing geotextile is naturally degradable and the degradation products are pollution-free, thereby protecting the environment while preventing wind and sand.

[0036] (2) The present invention has a reasonable structure; the EICP replenishing liquid can seep out from the gap between the supply plate and the butterfly joint, and flow to various places along the supply plate under the action of the liquid surface tension; the needle-punched geotextile, with its good filtering and water permeability function and the drainage effect of the geotextile fiber, can ensure that the EICP replenishing liquid drained from the supply plate can smoothly enter the soil and be evenly distributed within the coverage of the wind-proof and sand-fixing geotextile, avoiding the waste caused by the EICP replenishing liquid being concentrated infiltrated into a certain place in the sand soil due to the separate irrigation; in addition, due to the presence of the upper water-retaining film, favorable conditions for moisturizing are created for the EICP curing reaction, avoiding excessive evaporation in the desert; in summary, the reasonable structure of the present invention enables the EICP replenishing liquid to enter the soil evenly and creates suitable conditions for the EICP curing reaction;

[0037] (3) The present invention has a good sand-fixing ability. On the one hand, the wind-proof and sand-fixing geotextile is directly laid on the surface of the sand, isolating the contact between the airflow and the sand particles, and effectively suppressing the wind-blown sand. On the other hand, after the laying is completed, the EICP replenishment liquid is added to form a consolidation and cementation hard crust layer with a considerable thickness on the surface of the sand. The hard crust layer is not easily eroded by wind. Therefore, the wind-proof and sand-fixing effect of the present invention is significantly better than that of general geotextiles.

[0038] (4) The needle-punched geotextile in the present invention is made of cheap tropical plant fibers and processed using a common needle-punching process; the various parts of the supply system are produced using a mature thermoplastic process and a simple mechanical connection method, which is cost-effective and easy to achieve mass production of wind-proof and sand-fixing geotextiles based on EICP technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] 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.

[0040] Figure 1 This is a layered diagram of the windbreak and sand fixation geotextile based on EICP technology;

[0041] Figure 2 Schematic diagram of the recharge system laid inside the needle-punched geotextile;

[0042] Figure 3 This is a schematic diagram of a butterfly joint;

[0043] Figure 4 Schematic diagram of the supply plate.

[0044] The names of the components corresponding to the various figure marks in the figure are: 1. Needle-punched geotextile; 2. Supply system; 2-1. Main supply pipe; 2-1-1. Main supply pipe section; 2-2. Supply pipe joint; 2-3. Branch supply pipe; 2-3-1. Branch supply pipe section; 2-4. Butterfly joint; 2-4-1. Butterfly joint round pipe end; 2-4-2. Butterfly joint wing end; 2-4-2a. Slot; 2-4-3. Closed end; 2-4-4. Cavity; 2-5. Supply plate; 3. Water-retaining film. DETAILED DESCRIPTION

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] The following describes the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0052] like Figure 1-Figure 4As shown, the present invention provides a windproof and sand-fixing geotextile based on EICP technology, including a windproof and sand-fixing geotextile; the windproof and sand-fixing geotextile is composed of two layers of needle-punched geotextiles 1, a supply system 2 placed between the two layers of the needle-punched geotextiles 1, and a water-retaining film 3 placed on the outer surface of any layer of the needle-punched geotextiles 1, wherein the layer covered with the water-retaining film 3 needs to face upwards when laying. The needle-punched geotextile 1 is made of degradable plant fiber and is formed by a needle-punching process; the supply system 2 includes a main supply pipe 2-1, a supply pipe joint 2-2, a branch supply pipe 2-3, a butterfly joint 2-4 and a supply plate 2-5, and the main supply pipe 2-1 and the branch supply pipe 2-3 are interconnected; the branch supply pipe 2-3 includes a plurality of branch supply pipe sections 2-3-1 arranged along its axial direction, and the branch supply pipe section 2-3-1 close to the main supply pipe 2-1 is connected to the main supply pipe 2-1 through the supply pipe joint 2-2, and every two adjacent branch supply pipe sections 2-3-1 are connected by a butterfly joint 2-4, and the branch supply pipe section 2-3-1 farthest from the main supply pipe 2-1 is connected to a butterfly joint 2-4 at one end away from the main supply pipe 2-1, and the butterfly joint 2-4 is far away One end away from the main supply pipe 2-1 is a closed end 2-4-3; a cavity 2-4-4 is provided inside the butterfly joint 2-4, so that the butterfly joint 2-4 can be connected with its adjacent branch supply pipe section 2-3-1; the cavity 2-4-4 of the butterfly joint 2-4 passes through both ends of the butterfly joint 2-4 along the radial direction of the branch supply pipe 2-3; the supply plate 2-5 is assembled in the cavity 2-4-4, and the supply plate 2-5 extends out of the cavity 2-4-4 of the butterfly joint 2-4 along both ends of the radial direction of the branch supply pipe 2-3; and, there is a gap between the part of the supply plate 2-5 located in the cavity 2-4-4 and the inner wall of the butterfly joint 2-4; the water-retaining film 3 is made of degradable plastic and is coated on the outer surface of any layer of the wind-proof and sand-fixing geotextile through a hot-dip coating process.

[0053] In some embodiments, the butterfly joint 2-4 is located at both ends of the branch supply pipe 2-3 in the axial direction, and is extended outward along the axial direction of the branch supply pipe 2-3 to form a butterfly joint round tube end 2-4-1, and the butterfly joint round tube end 2-4-1 is used to connect the branch supply pipe section 2-3-1; the butterfly joint 2-4 is located at both ends of the branch supply pipe 2-3 in the radial direction and is extended outward along the radial direction of the branch supply pipe 2-3 to form a butterfly joint wing end 2-4-2, and the butterfly joint wing end 2-4-2 is provided with a plurality of cross-shaped slots 2-4-2 connected in sequence along the axial direction of the branch supply pipe 2-3. 4-2a, every two adjacent cross-shaped slots 2-4-2a are interconnected; the cross-section of the supply plate 2-5 in the axial direction of the branch supply pipe 2-3 is a plurality of cross-shaped structures connected in sequence, and the size of the cross-shaped slots 2-4-2a is slightly larger than the outer contour size of the cross-shaped structure of the cross-section of the supply plate 2-5, so that a gap is formed between the supply plate 2-5 and the cross-shaped slots 2-4-2a, so that the EICP supply liquid can seep out from the gap between the butterfly joint wing end 2-4-2 and the supply plate 2-5 under the action of the pressure in the pipe and the liquid tension, and flow along the outer surface of the supply plate 2-5.

[0054] In some embodiments, the main supply pipe 2-1 is connected to a plurality of branch supply pipes 2-3 arranged at intervals along its axial direction, and the upper and lower ends of each branch supply pipe 2-3 are connected to a needle-punched geotextile 1. In some embodiments, the main supply pipe 2-1 includes a plurality of main supply pipe sections 2-1-1 arranged sequentially along its axial direction, and the supply pipe joints 2-2 are configured as tee joints; each two adjacent main supply pipe sections 2-1-1 are connected via the supply pipe joints 2-2, and a branch supply pipe 2-3 is connected to either radial end of the supply pipe joints 2-2 located on the main supply pipe 2-1.

[0055] In some embodiments, one axial end of the main supply pipe 2-1 extends above the soil surface, and an opening is provided at this end for adding EICP replenishment fluid. Specifically, the EICP replenishment fluid comprises a soybean urease solution and a saline solution in a 1:1 ratio; the saline solution can be a 1:1 mixture of 0.2 mol / L urea solution and 0.2 mol / L calcium chloride solution.

[0056] In some embodiments, the supply system 2 is positioned and fixed between two layers of needle-punched geotextiles 1 using a degradable binding wire that passes through the two layers of needle-punched geotextiles 1, avoiding the supply system 2. This allows the two layers of needle-punched geotextiles 1 to be sewn together while simultaneously restricting the position of the supply system 2. Specifically, the degradable binding wire is made of polyadipate fiber.

[0057] In some embodiments, the components of the replenishment system 2 are made of polyadipate plastic and are individually processed and formed by a thermoplastic process so that they can be used to add EICP replenishment fluid during the initial use of solidified sand and soil, and can be naturally degraded in the later use without causing pollution to the environment.

[0058] In some embodiments, the degradable plant fiber of the needle-punched geotextile 1 is palm fiber, and the formed thickness of each layer of the needle-punched geotextile 1 is about 8 mm, so that it has the protective and water-permeable functions of a general needle-punched geotextile 1, and the palm fiber gradually degrades naturally and does not pollute the environment.

[0059] In some embodiments, the degradable plastic used in the water-retaining film 3 is polylactic acid (PLA), which is coated on the outer surface of any layer of the windproof and sand-fixing geotextile through a hot-dip process, and the film thickness is about 0.8 mm, so that it can play a moisturizing role when EICP replenishing liquid is added to solidify the sand in the initial use, and can be naturally degraded in the later use without causing pollution to the environment.

[0060] The present invention also provides a method for preparing a windbreak and sand-fixing geotextile based on the EICP technology, comprising the following steps:

[0061] (I) Preparation of a needle-punched geotextile 1: Palm fiber is used as raw material and processed by a needle-punching process to form a needle-punched geotextile 1, wherein each layer of the needle-punched geotextile 1 has a thickness of about 8 mm;

[0062] (II) Preparation of various components of the supply system 2: Using polyadipate plastic as raw material, the components are processed into a main supply pipe 2-1, a supply pipe connector 2-2, a branch supply pipe section 2-3-1, a butterfly connector 2-4, and a supply plate 2-5 through a thermoplastic process;

[0063] (III) The supply plate 2-5 is passed through the two butterfly joint wing ends 2-4-2 of the butterfly joint 2-4, with the supply plate 2-5 extending approximately 40 cm from both ends; the branch supply pipe sections 2-3-1 and the butterfly joints 2-4 are mechanically connected section by section; one end of a branch supply pipe section 2-3-1 located at both ends of the branch supply pipe 2-3 extends approximately 5 cm beyond the needle-punched geotextile 1, and the end extending beyond the needle-punched geotextile 1 is connected to the main supply pipe 2-1 through the supply pipe joint 2-2; the other end of the branch supply pipe section 2-3-1 is connected to a butterfly joint 2-4, and the end of the butterfly joint 2-4 away from the main supply pipe 2-1 is sealed by hot melt bonding;

[0064] (IV) Laying the connected supply system 2 on a layer of needle-punched geotextile 1, and then covering the supply system 2 with another layer of needle-punched geotextile 1, and sewing and binding fibers made of polyadipate plastic up and down through the slightly concave area of ​​the top layer of needle-punched geotextile 1 to connect the two layers of needle-punched geotextile 1 together;

[0065] (V) A coating liquid is prepared using polylactic acid (PLA) as a raw material and is coated on one side of the outer surface of the windbreak and sand-fixing geotextile through a hot-dip process to form a water-retaining film 3 with a film thickness of about 0.8 mm.

[0066] In some embodiments, in step (IV), the supply system 2 is limited and fixed inside the two layers of needle-punched geotextiles 1, and is connected together by bundling the fibers up and down; after step (V) is completed, the wind-proof and sand-fixing geotextile is a sheet-like structure as a whole and cannot be folded; after being transported to the construction site and laid, the exposed ends of the branch supply pipes 2-3 of a row of several wind-proof and sand-fixing geotextiles are mechanically connected to the main supply pipe section 2-1-1 through a three-way joint using a supply pipe joint 2-2, so that the main supply pipe 2-1 is connected in parallel to multiple pieces of wind-proof and sand-fixing geotextiles, and then the soil is covered and pressed, and the end of the main supply pipe 2-1 is kept above the soil surface for adding EICP supply liquid.

[0067] The following is a specific application scenario of the wind-proof and sand-fixing geotextile based on EICP technology in the above embodiment, but it is not limited to this: the wind-proof and sand-fixing geotextile based on EICP technology is transported from the factory to the construction site of the key area where wind-proof and sand-fixing is required, and the sand slope area to be laid is leveled, and the wind-proof and sand-fixing geotextile based on EICP technology is laid in the area. When laying, the layer covered with the water-retaining film 3 needs to face upwards; during the construction process, at least 10 cm of overlap is required between each two pieces of geotextile; the exposed end of the branch supply pipe 2-3 of each row of geotextile is mechanically connected to the main supply pipe section 2-1-1 through a three-way joint in turn; then the soil is covered on the geotextile to press the cloth, the covering thickness is about 30 cm, and the open end of the main supply pipe 2-1 is extended above the soil surface; when in use, EICP supply liquid is added once every two days through the supply system 2, and the amount used each time is 5L / m 2 , added 5 times in total.

[0068] 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.

[0069] 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 windbreak and sand fixation geotextile based on EICP technology, characterized by: The windbreak and sand fixation geotextile is composed of two layers of needle-punched geotextiles (1), a supply system (2) placed between the two layers of needle-punched geotextiles (1), and a water-retaining film (3) placed on the outer surface of any one layer of the needle-punched geotextiles (1); The needle-punched geotextile (1) is made of degradable plant fibers and is formed by a needle-punching process; The supply system (2) comprises a main supply pipe (2-1), a supply pipe joint (2-2), a branch supply pipe (2-3), a butterfly joint (2-4) and a supply plate (2-5); the main supply pipe (2-1) and the branch supply pipe (2-3) are interconnected; The branch supply pipe (2-3) comprises a plurality of branch supply pipe sections (2-3-1) arranged along its axial direction. The branch supply pipe section (2-3-1) close to the main supply pipe (2-1) is connected to the main supply pipe (2-1) via the supply pipe joint (2-2). Every two adjacent branch supply pipe sections (2-3-1) are connected via a butterfly joint (2-4). The branch supply pipe section (2-3-1) farthest from the main supply pipe (2-1) is connected to a butterfly joint (2-4) at one end away from the main supply pipe (2-1), and the end of the butterfly joint (2-4) away from the main supply pipe (2-1) is a closed end (2-4-3). A cavity (2-4-4) is provided inside the butterfly joint (2-4) so ​​that the butterfly joint (2-4) can be connected to its adjacent branch supply pipe section (2-3-1). The cavity (2-4-4) of the butterfly joint (2-4) passes through both ends of the butterfly joint (2-4) along the radial direction of the branch supply pipe (2-3); the supply plate (2-5) is assembled in the cavity (2-4-4), and the supply plate (2-5) extends out of the cavity (2-4-4) of the butterfly joint (2-4) along both ends of the radial direction of the branch supply pipe (2-3); and a gap is formed between the portion of the supply plate (2-5) located in the cavity (2-4-4) and the inner wall of the butterfly joint (2-4); The water-retaining film (3) is made of degradable plastic and is coated on the outer surface of any layer of the wind-proof and sand-fixing geotextile through a hot-dip coating process; The butterfly joints (2-4) are located at both ends of the branch supply pipe (2-3) in the axial direction, and are extended outward along the axial direction of the branch supply pipe (2-3) to form butterfly joint round tube ends (2-4-1). The butterfly joint round tube ends (2-4-1) are used to connect the branch supply pipe sections (2-3-1). The butterfly joint (2-4) is located at both ends of the branch supply pipe (2-3) in the radial direction and extends outward along the radial direction of the branch supply pipe (2-3) to form butterfly joint wing ends (2-4-2). The butterfly joint wing ends (2-4-2) are provided with a plurality of cross-shaped slots (2-4-2a) connected in sequence along the axial direction of the branch supply pipe (2-3), and every two adjacent cross-shaped slots (2-4-2a) are connected to each other. The cross section of the supply plate (2-5) in the axial direction of the branch supply pipe (2-3) is a plurality of cross-shaped structures connected in sequence, and the size of the cross-shaped slot (2-4-2a) is slightly larger than the outer contour size of the cross-shaped structure of the cross section of the supply plate (2-5), so that a gap is formed between the supply plate (2-5) and the cross-shaped slot (2-4-2a).

2. The windbreak and sand-fixing geotextile based on EICP technology according to claim 1, characterized in that: The main supply pipe (2-1) is connected to a plurality of branch supply pipes (2-3) arranged at intervals along its axial direction, and the upper and lower ends of each branch supply pipe (2-3) are connected to a needle-punched geotextile (1).

3. The windbreak and sand-fixing geotextile based on EICP technology according to claim 2, characterized in that: The main supply pipe (2-1) comprises a plurality of main supply pipe sections (2-1-1) arranged in sequence along its axial direction, and the supply pipe joint (2-2) is a tee joint; every two adjacent main supply pipe sections (2-1-1) are connected via the supply pipe joint (2-2), and a branch supply pipe (2-3) is connected to any one radial end of the supply pipe joint (2-2) located on the main supply pipe (2-1).

4. The windbreak and sand-fixing geotextile based on EICP technology according to claim 1, characterized in that: One end of the main supply pipe (2-1) extends above the soil surface along its axial direction, and an opening is provided at the end of the main supply pipe (2-1) extending above the soil surface for adding EICP supply liquid.

5. The windbreak and sand-fixing geotextile based on EICP technology according to claim 1, characterized in that: The supply system (2) is fixed in position between the two layers of needle-punched geotextiles (1): a degradable binding wire is used to pass through the two layers of needle-punched geotextiles (1) up and down, avoiding the supply system (2), so that the two layers of needle-punched geotextiles (1) are sewn together while limiting the position of the supply system (2).

6. The windbreak and sand-fixing geotextile based on EICP technology according to claim 1, characterized in that: The degradable plant fiber used in the needle-punched geotextile (1) is selected from palm fiber or pineapple leaf fiber; the degradable plastic used in the water-retaining film (3) is selected from polylactic acid (PLA) or polybutylene adipate / terephthalate (PBAT).

7. The windbreak and sand-fixing geotextile based on EICP technology according to claim 1, characterized in that: The windproof and sand-fixing geotextile is a sheet-like structure as a whole and cannot be folded.

8. A method for preparing a windbreak and sand-fixing geotextile based on the EICP technology of claim 1, characterized in that: The following steps are included: (I) Preparation of needle-punched geotextile (1): using degradable tropical plant fiber as raw material and processing it by needle-punching to form needle-punched geotextile (1); (II) Preparation of various components of the supply system (2): using biodegradable plastic as raw material, and processing them into a main supply pipe (2-1), a supply pipe joint (2-2), a branch supply pipe section (2-3-1), a butterfly joint (2-4) and a supply plate (2-5) through a thermoplastic process; (III) The supply plate (2-5) is passed through the two butterfly joint wing ends (2-4-2) of the butterfly joint (2-4), and both ends of the supply plate (2-5) are extended to a certain length; the branch supply pipe section (2-3-1) and the butterfly joint (2-4) are mechanically connected section by section; one end of a branch supply pipe section (2-3-1) located at both ends of the axial direction of the branch supply pipe (2-3) is extended to a certain length outside the needle-punched geotextile (1), and the end extending from the needle-punched geotextile (1) is connected to the main supply pipe (2-1) through the supply pipe joint (2-2); the branch supply pipe section (2-3-1) at the other end is connected to a butterfly joint (2-4), and the end of the butterfly joint (2-4) away from the main supply pipe (2-1) is sealed by hot melt bonding; (IV) Laying the connected supply system (2) on a layer of needle-punched geotextile (1), and then covering the supply system (2) with another layer of needle-punched geotextile (1), and using degradable binding fibers to sew and bind the slightly concave area of ​​the uppermost layer of needle-punched geotextile (1) up and down to connect the two layers of needle-punched geotextile (1) together; (V) A coating liquid is made from degradable plastic and coated on the outer surface of the windbreak and sand-fixing geotextile through a hot-dip coating process to form a water-retaining film (3).

9. The method for preparing a windbreak and sand-fixing geotextile based on EICP technology according to claim 8, characterized in that: In the step (IV), the supply system (2) is fixed in position inside the two layers of needle-punched geotextiles (1), and the two layers of needle-punched geotextiles (1) are connected together by bundling the fibers up and down; After step (V) is completed, the windbreak and sand-fixing geotextile is in a sheet-like structure as a whole and cannot be folded; after being transported to the construction site and laid, the exposed ends of the branch supply pipes (2-3) of a row of several windbreak and sand-fixing geotextiles are mechanically connected to the main supply pipe section (2-1-1) in sequence using a supply pipe joint (2-2), so that the main supply pipe (2-1) is connected in parallel to multiple windbreak and sand-fixing geotextiles, and then the soil is covered and the geotextiles are pressed, and the end of the main supply pipe (2-1) is kept protruding above the soil surface for adding EICP supply liquid.

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