Wind prevention and sand fixation geotextile based on EICP technology and preparation method of wind prevention and sand fixation geotextile

Abstract

The invention discloses wind-proof and sand-fixing geotechnical cloth based on an EICP technology and a preparation method. The wind-proof and sand-fixing geotechnical cloth is composed of two layers of needle-punched geotechnical cloth, a supply system arranged between the two layers of needle-punched geotechnical cloth and a water retention film arranged on the outer surfaces of the needle-punched geotechnical cloth. The needle-punched geotextile takes degradable plant fibers as raw materials, and is processed and formed by a needle punching process; the replenishment system comprises a main replenishment pipe, a replenishment pipe joint, a branch replenishment pipe, a butterfly-shaped joint and a replenishment plate; the branch supply pipe comprises a plurality of branch supply pipe sections arranged in the axial direction of the branch supply pipe, the branch supply pipe sections are connected with the main supply pipe through supply pipe connectors, and every two adjacent branch supply pipe sections are connected through a butterfly connector. The supply plate extends out of the cavity of the butterfly joint along the two radial ends of the branch supply pipe; a gap is formed between the part, located in the cavity, of the supply plate and the inner wall of the butterfly-shaped connector; the water retention 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 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] Geotextile is an important material for windbreak and sand fixation. Geotextile directly covers the surface of sand and soil, which can prevent the sand and soil from being blown up by wind. It is widely used due to its low cost, fast construction, simple process and obvious effect.

[0003] In fact, most of the existing geotextiles used for windbreak and sand fixation are made of synthetic fiber materials that are not easily degradable. Although they can achieve windbreak and sand fixation, the geotextiles themselves will pollute the environment. In addition, general geotextiles cannot use the biosolidation process to achieve the consolidation and bonding of sand. In the long run, the effect of windbreak and sand fixation is limited. Therefore, in order to meet the growing construction requirements and address the shortcomings of general geotextiles for windbreak and sand fixation, there is an urgent need for a geotextile for windbreak and sand fixation that is degradable, pollution-free, and has a certain ability to biosolidify sand. 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. The purpose of wind-proof and sand-fixing can be achieved by further reinforcing the surrounding sand and soil by relying on the coverage of the wind-proof and sand-fixing geotextile itself and utilizing the EICP solidification technology.

[0006] (II) Technical solution

[0007] The solution adopted by the present invention to solve the above technical problems is a wind-proof 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 one layer of the needle-punched geotextiles;

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

[0009] The supply system comprises 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 interconnected;

[0010] The branch supply pipe comprises a plurality of branch supply pipe sections arranged along the axial direction thereof, the branch supply pipe section close to the main supply pipe is 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, and a 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 be connected to 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 wind-proof and sand-fixing geotextile through a hot-dip coating process.

[0013] Specifically, each component of the replenishment system is made of polybutylene adipate or 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 a butterfly joint round tube end, and the butterfly joint round tube end is used to connect the branch supply pipe section;

[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 hole 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 hole, 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 in the pipe and the liquid tension, 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 a plurality of 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 an opening is provided at the end of the main supply pipe extending above the soil surface to add EICP supply fluid.

[0020] Specifically, the EICP replenishing solution includes soybean urease solution and salt solution, which are prepared in a ratio of 1:1; wherein 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 limited and fixed between two layers of needle-punched geotextiles; a degradable bundling 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 polybutylene adipate or terephthalate (PBAT) fibers.

[0023] In some embodiments, the degradable plant fiber used in the needle-punched geotextile is selected from 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 selected from polyadipate or polybutylene 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 problem 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 parts of the supply system: using biodegradable plastic as raw material, processing them into a main supply pipe, a supply pipe joint, a branch supply pipe section, a butterfly joint and a supply plate 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 are extended to a certain length; the branch supply pipe section and the butterfly joint are mechanically connected section by section; one end of a branch supply pipe section located at the two ends of the axial direction of the branch supply pipe extends out of the needle-punched geotextile for a certain length, and the end extending out of 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, and then covering the supply system with another layer of needle-punched geotextile, and connecting the two layers of needle-punched geotextiles together by sewing and binding with degradable binding fibers up and down in the slightly concave area of ​​the uppermost layer of needle-punched geotextile;

[0030] (V) A coating liquid is made from biodegradable 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 in position inside the two layers of needle-punched geotextiles, and is simultaneously connected together by bundling fibers passing up and down;

[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 in sequence 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 protruding above the soil surface for adding EICP supply liquid.

[0033] (III) Beneficial effects

[0034] Compared with the prior art, the present invention designs a windproof and sand-fixing geotextile based on EICP technology and a preparation method thereof.

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

[0036] (2) The present invention has a reasonable structure; the EICP replenishing liquid can seep out from the gap between the replenishing plate and the butterfly joint, and flow to various places along the replenishing plate under the action of the liquid surface tension; the needle-punched geotextile, with its good filtering and water permeability function and the drainage function of the geotextile fiber, can ensure that the EICP replenishing liquid drained from the replenishing 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 of the sand soil due to the single irrigation; in addition, due to the presence of the upper water-retaining film, favorable conditions for moisture retention 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 shell layer with a considerable thickness on the surface of the sand, and the hard shell 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 replenishment 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 drawings required for use in the embodiments will be briefly introduced below. 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 paying creative work.

[0040] Figure 1 The schematic diagram of the layers of the windbreak and sand fixation geotextile based on EICP technology;

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

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

[0043] Figure 4 This is a 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. Round tube end of butterfly joint; 2-4-2. Wing end of butterfly joint; 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 specific implementation of the present invention is further described in detail below in conjunction with 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 clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The following describes the implementation methods 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 implementation methods, 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 following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present 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 the present 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 drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0050] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

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

[0052] like Figure 1-Figure 4As shown, the present invention provides a wind-proof and sand-fixing geotextile based on EICP technology, including a wind-proof and sand-fixing geotextile; the wind-proof 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 through 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 from the main supply pipe 2-1. 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 two ends of the butterfly joint 2-4 located in the radial direction of the branch supply pipe 2-3 are 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 in sequence along its axial direction, and the supply pipe joint 2-2 is a three-way joint; every two adjacent main supply pipe sections 2-1-1 are connected by the supply pipe joint 2-2, and the supply pipe joint 2-2 is located at any radial end of the main supply pipe 2-1 and is connected to a branch supply pipe 2-3.

[0055] In some embodiments, one end of the main supply pipe 2-1 along its axial direction extends above the soil surface, and the end of the main supply pipe 2-1 extending above the soil surface is provided with an opening for adding EICP supply liquid. Specifically, the EICP supply liquid comprises soybean urease solution and salt solution, which are prepared in a ratio of 1:1; wherein 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.

[0056] In some embodiments, the supply system 2 is fixed between 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. Specifically, the degradable binding wire is made of polyadipate fiber.

[0057] In some embodiments, each component of the replenishment system 2 is made of polyadipate plastic and is processed and formed by a thermoplastic process so that it 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 molding thickness of each layer of the needle-punched geotextile 1 is about 8 mm, so that it has the protection and water-permeable functions of a general needle-punched geotextile 1, and the palm fiber gradually degrades naturally and will 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 wind-proof and sand-fixing geotextile through a hot-dip coating process, and the film thickness is about 0.8 mm, so that it can play a moisturizing role when the EICP replenishing liquid is added to solidify the sand in the initial use, and it 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 windproof and sand-fixing geotextile based on the EICP technology, comprising the following steps:

[0061] (I) Preparation of a needle-punched geotextile 1: Using palm fiber as raw material, a needle-punched geotextile 1 is formed by a needle-punching process, and 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, 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 respectively 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, and the two ends of the supply plate 2-5 extend out by about 40 cm; 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 the two ends of the axial direction of the branch supply pipe 2-3 extends out of the needle-punched geotextile 1 by about 5 cm, and the end extending out of 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;

[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 using binding fibers made of polyadipate plastic to sew and bind the two layers of needle-punched geotextile 1 together by passing through and sewing the slightly concave area of ​​the uppermost layer of needle-punched geotextile 1;

[0065] (V) A coating liquid is prepared with polylactic acid (PLA) as a raw material and coated on one side of the outer surface of the windbreak and sand-fixing geotextile through a hot-dip coating 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 geotextile 1, and is realized by bundling the fibers to pass through up and down to connect the two layers of needle-punched geotextile 1 together; after the completion of step (V), 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 in sequence 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 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 protruding 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 the EICP technology in the above-mentioned embodiment, but it is not limited to this: the wind-proof and sand-fixing geotextile based on the EICP technology is transported from the factory to the construction site of the key area where wind-proof and sand-fixing is required, and after the sand slope area to be laid is leveled, the wind-proof and sand-fixing geotextile based on the 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 in turn through a three-way joint; 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 2 days through the supply system 2, and the amount used each time is 5L / m 2 , added 5 times in total.

[0068] The same and similar parts between the various embodiments in this specification can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0069] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A windproof and sand-fixing geotextile based on EICP technology, characterized by: 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 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 the axial direction thereof; 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); a 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 provided 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 as raw material and is coated on the outer surface of any layer of the windproof and sand-fixing geotextile through a hot-dip coating process.

2. The windproof and sand-fixing geotextile based on EICP technology according to claim 1, characterized in that: The butterfly joint (2-4) is located at two 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 two ends of the butterfly joint (2-4) located in the radial direction of the branch supply pipe (2-3) extend outward along the radial direction of the branch supply pipe (2-3) to form butterfly joint wing ends (2-4-2), and 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 hole (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 hole (2-4-2a).

3. The windproof 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).

4. The windproof and sand-fixing geotextile based on EICP technology according to claim 3, 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) can be 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 end of the supply pipe joint (2-2) located in the radial direction of the main supply pipe (2-1).

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

6. The windproof 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 the needle-punched geotextile (1): a degradable binding wire is used to pass through the two layers of the needle-punched geotextile (1) up and down, avoiding the supply system (2), so that the two layers of the needle-punched geotextile (1) are sewn together and the position of the supply system (2) is limited.

7. The windproof 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) can be palm fiber or pineapple leaf fiber; the degradable plastic used in the water-retaining film (3) can be polylactic acid (PLA) or polybutylene adipate / terephthalate (PBAT).

8. The windproof 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.

9. A method for preparing a windproof and sand-fixing geotextile based on EICP technology, characterized in that: The steps include: (I) Preparation of a needle-punched geotextile (1): using degradable tropical plant fiber as raw material and forming the needle-punched geotextile (1) through a needle-punching process; (II) preparing the 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 the two 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 the two axial ends of the branch supply pipe (2-3) extends out of the needle-punched geotextile (1) to a certain length, and the end extending out of the needle-punched geotextile (1) is connected to the main supply pipe (2-1) through a 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 as a raw material 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).

10. The method for preparing the windproof and sand-fixing geotextile based on EICP technology according to claim 9, 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 fibers passing up and down; After the completion of step (V), 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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