Wind prevention and sand fixation barrier production process and construction method thereof
By using windbreak and sand-fixing belts made of polypropylene material, combined with the construction method of anchor bolts and fixing rings, the problem of straw checkerboard sand barriers being easily bent in strong winds has been solved. This has resulted in higher tensile strength and anti-aging ability, reduced wind speed, reduced sand and dust, and extended service life.
Patent Information
- Application Number
- CN202511116583.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-11
- Publication Date
- 2025-11-18
Smart Images
Figure CN120963104A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of wind prevention and sand fixation, and particularly relates to a production process of a wind prevention and sand fixation barrier and a construction method thereof. BACKGROUND
[0002] With the increasing land desertification, human survival is seriously threatened, and wind prevention and sand fixation has become an urgent task. In recent decades, with the increasing understanding of the desert by human beings, desert control has also begun to have certain effectiveness, and many types of sand prevention and fixation engineering measures have appeared. Common wind prevention and sand fixation methods and measures include afforestation, setting sand barriers, planting protective forests, installing wind prevention and dust suppression nets, grassland covering, forest belt planting, geotextile covering, and gravel sand fixation. Among them, the wind prevention and sand fixation barrier scheme is widely used in various wind prevention and sand control projects due to various factors such as construction period, effective time, and construction cost.
[0003] At present, the widely used wind prevention and sand fixation barrier scheme is mainly a grass checkerboard sand barrier. Due to the limitations of construction technology and material properties, in the case of high wind speed, the grass stem will bend, the gap between the upright grass stems will increase, the wind speed reducing effect will be greatly reduced, and with the passage of time, the situation will become more serious, and the wind prevention and sand fixation effect and service life cannot fully meet the needs. SUMMARY
[0004] In order to solve the above problems, the present application provides a production process of a wind prevention and sand fixation barrier and a construction method thereof.
[0005] The above technical purpose of the present application is realized by the following technical scheme: a production process of a wind prevention and sand fixation barrier, the wind prevention and sand fixation barrier comprising an anchor rod, a wind prevention and sand fixation belt, and a fixed ring, a through groove is arranged radially in the middle of the top end of the anchor rod downward, and the production steps of the wind prevention and sand fixation belt are as follows:
[0006] Batching: taking polypropylene as raw material, adding 5% black masterbatch, 0.075% toughening agent, 0.2% rigidifying agent, and 0.1% light stabilizer, and fully stirring;
[0007] Forming: plasticizing extrusion is carried out through a single screw extruder, and then rolling is carried out through a rolling device to form a plate material with uniform thickness and smooth surface;
[0008] Punching: a special punching die is used to punch a plurality of rows of uniformly arranged forming holes on the formed plate material;
[0009] Stretching: a multi-roller stretching machine is used to longitudinally stretch the punched plate material to form a strip at a stretching ratio of 3-4 times, and the stretching temperature is 126±1 DEG C;
[0010] Slitting: using the method of online slitting, the strip after stretching is cut into a set width of longitudinal continuous strip;
[0011] Winding: after the strip after stretching and slitting is cooled, it is wound into a roll.
[0012] By adopting the above technical scheme, the addition of black masterbatch, toughening agent, rigidifying agent, light stabilizer and other various additives effectively improves the anti-oxidation and anti-aging ability of the windproof sand-fixing belt, and ensures the service life; through longitudinal stretching with a stretching ratio of 3-4 times, the tensile strength of the windproof sand-fixing belt is effectively improved.
[0013] Further, the carbon black content of the black masterbatch added in the batching step is ≥42%, the carbon black particle size is 20-60 nm, and the ash content is ≤0.5%.
[0014] By adopting the above technical scheme, the appropriate black masterbatch is selected, which takes into account the cost while ensuring the effect.
[0015] Further, the size of the forming hole in the punching step is 1.42×1.42 mm, and the stretching ratio in the stretching step is 3.2 times.
[0016] By adopting the above technical scheme, the forming hole with a size of 1.42×1.42 mm and the stretching ratio of 3.2 times are selected to obtain the optimal tensile strength and windproof sand-fixing effect.
[0017] Further, the windproof sand-fixing belt after forming is in the form of a strip, and a plurality of rows of elliptical through holes are arranged on the surface of the strip, the major axis of the elliptical through hole is 14 mm, the minor axis is 3 mm, and the opening rate of the strip surface is 38%-42%.
[0018] By adopting the above technical scheme, the elliptical through holes are arranged on the strip, which facilitates the wind formed by the external environment to pass through the strip and reduce the wind speed, so that when the wind formed by the external environment passes through the strip, the airflow in multiple directions of up, down, left and right interferes with each other on the inside of the strip, so as to achieve the effect of strong wind on the outside, weak wind on the inside, small wind on the outside, and no wind on the inside, preventing the flying of sand and dust. The opening rate is set to 38%-42%, which improves the windproof sand-fixing effect while ensuring the strength of the strip.
[0019] Further, the anchor rod is in the form of a circular tube, and the forming method is one of the following methods:
[0020] 1) integrally formed by injection molding process using polyester, polypropylene, ABS or other high molecular materials;
[0021] 2) made by cutting processing using galvanized steel pipe, stainless steel pipe or other metal materials;
[0022] 3) It is made of resin and high-strength fiber material and molded by molding.
[0023] By adopting the above technical solutions, the structural strength of the anchor bolts is guaranteed.
[0024] This application also discloses a method for constructing windbreaks and sand-fixing barriers, including the following steps:
[0025] The sandy ground in the construction area was cleared and leveled.
[0026] Draw several horizontal and vertical construction lines on the sandy ground in the construction area and form several intersection points;
[0027] Anchor bolts are inserted at intervals at several intersections on the same transverse construction line, and the anchor bolts on adjacent transverse construction lines are staggered.
[0028] The windbreak and sand-fixing belt is spread out in a Z-shaped direction with the anchor bolt as the turning point and inserted into the through groove of the corresponding anchor bolt, and a fixing ring is put on the top of the anchor bolt;
[0029] The two halves of the anchor rod, which are divided by the through groove at the top, are turned outward or expanded outward. The top of the anchor rod is then hammered so that the lower edge of the windbreak and sand-fixing belt is submerged in the sand.
[0030] By adopting the above technical solutions, the ground cleaning, leveling, and layout steps before construction provide a standardized benchmark for subsequent construction and reduce deviations during the construction process. The through-slot is used for the windbreak and sand-fixing belt to pass through, and together with the fixed ring and the structure of the outward-turned or outward-expanding top of the anchor rod, it can firmly lock the windbreak and sand-fixing belt and prevent it from loosening or falling off under the action of wind. The spaced and staggered anchor rods, together with the windbreak and sand-fixing belt spreading in a Z-shaped direction, make the windbreak and sand-fixing belt form an interlaced protective structure on the sand surface, which can effectively disperse wind force, reduce the direct impact of wind speed on the sand surface, and reduce the flow of wind and sand. Hammering the anchor rods makes the lower edge of the windbreak and sand-fixing belt sink into the sand, further enhancing the connection strength between the overall structure and the sandy ground, keeping the whole structure in good protective condition and extending the service life of the windbreak and sand-fixing barrier.
[0031] Furthermore, the groove length direction of the through groove in the anchor rod on the first transverse construction line is consistent with the length direction of the transverse construction line, while the groove length direction of the through groove in the outermost anchor rod on other transverse construction lines is perpendicular to the length direction of the transverse construction line.
[0032] By adopting the above technical solution, the groove length direction of the through-groove in the outermost anchor rod on other transverse construction lines is arranged perpendicular to the length direction of the transverse construction line. On the one hand, this facilitates the turning of the windbreak and sand-fixing belt between adjacent rows of anchor rods, so that the windbreak and sand-fixing belt can be arranged continuously; on the other hand, it can be used to connect with the surrounding windbreak and sand-fixing barriers.
[0033] In summary, the present application has the following beneficial effects:
[0034] 1、 In the application, the addition of black masterbatch, toughening agent, rigidifying agent, light stabilizer and other various additives effectively improves the anti-oxidation and anti-aging ability of the windproof sand-fixing belt, ensuring the service life; through longitudinal stretching of 3-4 times the stretching ratio, the tensile strength of the windproof sand-fixing belt is effectively improved.
[0035] 2、 In the application, through the steps of ground cleaning, leveling and line laying before construction, a standard reference is provided for subsequent construction, reducing the deviation in the construction process; the through slot is used for the windproof sand-fixing belt to pass through, and the fixed ring and the anchor rod top end are combined to form an outward turning or outward swelling deformation structure, which can firmly lock the windproof sand-fixing belt, avoiding loosening and falling under the action of wind; the anchor rods arranged at intervals and staggered are combined with the windproof sand-fixing belt to form a Z-shaped development, so that the windproof sand-fixing belt forms an interlaced protective structure on the sand surface, which can effectively disperse wind power, reduce the direct impact of wind speed on the sand surface, and reduce the flow of wind and sand; hammering the anchor rod makes the lower edge of the windproof sand-fixing belt sink into the sand, further enhancing the connection strength of the overall structure and the sand surface, so that the overall structure maintains a good protective state, prolonging the service life of the windproof sand-fixing barrier. BRIEF DESCRIPTION OF DRAWINGS
[0036] Fig. 1 is the construction layout of the windproof sand-fixing barrier of the embodiment of the present application, wherein the arrow direction is the layout direction of the windproof sand-fixing belt;
[0037] Fig. 2 is a structural schematic diagram of the anchor rod and the fixed ring of the embodiment of the present application;
[0038] Fig. 3 is a planar structural schematic diagram of the windproof sand-fixing belt of the embodiment of the present application.
[0039] In the figure: 10, anchor rod; 11, through slot; 20, windproof sand-fixing belt; 21, oval-shaped through hole; 30, fixed ring. DETAILED DESCRIPTION
[0040] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments; based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0041] As Figs. 1-3As shown, the embodiment of the present application discloses a wind and sand prevention barrier, which comprises an anchor rod 10, a wind and sand prevention belt 20 and a fixing ring 30. The anchor rod 10 is in a round rod structure, the lower half of the anchor rod 10 is used for inserting into the ground and fixed with the ground, and the upper half is provided with a radial through slot 11 which is opened from the middle of the top end downwards, and the through slot 11 is used for fixing the wind and sand prevention belt 20. The depth of the through slot 11 is greater than the width of the wind and sand prevention belt 20, so that the wind and sand prevention belt 20 can be completely placed in the through slot 11. The wind and sand prevention belt 20 is a belt which is stretched and formed by a polypropylene composite material, and a plurality of rows of elliptical through holes 21 are arranged on the belt in an interval. The fixing ring 30 is in a ring structure, and is used for sleeving on the top end of the anchor rod 10. After the wind and sand prevention belt 20 is installed, the two half rod bodies which are divided by the through slot 11 at the top end of the anchor rod 10 can be deformed by being turned outwards or bulged outwards by using a tool, so that the fixing ring 30 cannot be separated from the anchor rod 10, thereby fixing the wind and sand prevention belt 20 in the through slot 11 to prevent the wind and sand prevention belt 20 from loosening and falling off under the action of wind.
[0042] The embodiment of the present application also discloses a production process of the wind and sand prevention barrier, which comprises a forming process of the anchor rod 10 and a production method of the wind and sand prevention belt 20.
[0043] Specifically, the forming mode of the anchor rod 10 is one of the following modes:
[0044] 1) integrally formed by using polyester, polypropylene, ABS or other high molecular materials through an injection molding process;
[0045] 2) made by cutting processing by selecting a galvanized steel pipe, a stainless steel pipe or other metal materials;
[0046] 3) formed by using resin and high-strength fiber materials through a molding mode.
[0047] The production steps of the wind and sand prevention belt 20 are as follows:
[0048] Dosing: polypropylene is used as raw material, 5% of black mother, 0.075% of toughening agent, 0.2% of rigidifying agent and 0.1% of light stabilizer are added, and the mixture is fully stirred, and other functional additives can also be added according to needs.
[0049] The black masterbatch is the main source of carbon black in the strip. In order to ensure the content of carbon black in the strip, the smaller the content of carbon black in the black masterbatch, the greater the amount of black masterbatch added. However, since the dispersant, brightener and other components in the black masterbatch have an impact on the mechanical properties of the strip, the more these components, the lower the tensile strength of the strip, therefore, the greater the content of carbon black in the black masterbatch is better. The price of black masterbatch on the market will gradually increase with the increase of the content of carbon black, and the cost performance should be considered, so the black masterbatch with carbon black content ≥ 42% is selected, and 42% is the best. In addition to dyeing, carbon black is also a good anti-aging agent for polypropylene materials, which can shield ultraviolet rays, absorb ultraviolet energy in light, and prevent photoaging. With the increase of the content of carbon black, the anti-aging performance of polypropylene products is gradually enhanced, and when the content reaches 2%, the anti-aging performance does not change significantly with the increase of the content of carbon black, but the adverse effect of carbon black on the tensile strength of the product is more and more obvious. Therefore, the addition of 5% black masterbatch can make the content of carbon black in the strip about 2%, ensuring good anti-aging performance.
[0050] The carbon black dyeing effect is relatively ideal when the particle size is in the range of 20-60 nm, the dispersibility is the best, and the impact on the mechanical properties of the strip is also smaller; the ash content in the black masterbatch comes from the black masterbatch base and inorganic fillers, which has a greater negative impact on the strip, such as reducing the tensile strength, surface gloss, and internal micro-cracks of the product, therefore, the ash content in the black masterbatch is ≤ 0.5%.
[0051] The addition of 0.075% toughening agent and 0.2% rigidifying agent can eliminate the mechanical property decline of the strip caused by the addition of black masterbatch, and ensure that the strip has sufficient wind bearing capacity; the light stabilizer is a compound light stabilizer of type 388PP5 of American Cyanite brand, which can further eliminate free radicals generated between polypropylene molecules under natural light, quench excited state molecules, effectively reduce the occurrence of photooxidation, significantly prolong the photoaging period of the product, and ensure and improve the anti-aging ability of the product, effectively prolonging its service life.
[0052] Molding: plasticizing extrusion is carried out through a single screw extruder, and then the formed plate with uniform thickness and smooth surface is formed through a rolling device.
[0053] Punching: a special punching die is used to punch a plurality of rows of uniformly spaced formed holes on the formed plate, and the size of the formed hole is 1.42*1.42mm.
[0054] Stretching: the plate after punching is stretched longitudinally by a stretching machine to form a strip at a stretching ratio of 3-4 times, and the preferred stretching ratio is 3.2 times; the stretching temperature is 126±1℃, and the uniformity of the stretching at the stretching ratio is ensured.
[0055] In order to achieve high longitudinal tensile strength, the stretching ratio of the ordinary polypropylene material unidirectional stretching product is generally 11-12 times, so that the longitudinal tensile strength can reach about 350 MPa, but the transverse brittleness will increase obviously, and the tensile strength will be as low as below 25 MPa, lower than the tensile strength of the raw material, and easy to bend and break. In order to ensure the suitable bearing capacity in both longitudinal and transverse directions and maintain certain anti-brittleness performance, various different stretching ratios are tested, which can be seen in the following table:
[0056]
[0057] Table 1: Comparison table of longitudinal and transverse tensile strength and brittleness of the strip under different stretching ratios
[0058] When the unidirectional stretching ratio of 3-4 times is selected, the transverse tensile strength of the strip increases obviously, and no folding and breaking occurs, so that the strip has excellent anti-brittleness performance. When the unidirectional stretching ratio is 3.2 times, the transverse tensile strength of the strip can reach 40 MPa, slightly higher than the raw material itself, and the longitudinal tensile strength can reach 330 MPa, which fully meets the use requirements of the strip.
[0059] Slitting: The method of online width slitting is adopted to slit the strip after stretching and forming into a longitudinal continuous strip with a set width, so as to ensure that the width tolerance of the strip is controlled within ±1 mm and the accuracy of the strip cooperating with the anchor rod 10 in the construction process is ensured.
[0060] Winding: After the strip after stretching and slitting is cooled, it is wound into a roll to form a strip roll of the wind and sand prevention strip 20, which is convenient for later use.
[0061] The wind and sand prevention strip 20 made through the above steps has an elliptical through hole 21 on the strip surface, the major axis of which is 14 mm, and the minor axis is 3 mm. The opening rate of the elliptical through hole 21 on the strip surface of the wind and sand prevention strip 20 is 38%-42%, that is, the area ratio of the elliptical through hole 21 on the strip surface of the wind and sand prevention strip 20 is 38%-42%. Through the opening of the elliptical through hole 21, when the airflow formed by the external environment blows from the outside of the wind and sand prevention strip 20 to the strip, the airflow passes through the flat and long elliptical through hole 21, and multiple direction scattering occurs, which interferes with the scattering airflow generated by the surrounding holes, and forms multiple direction interfering airflows on the inside of the strip, such as up, down, left and right, to achieve the effect of strong wind outside, weak wind inside, small wind outside, and no wind inside, so as to reduce the airflow speed and prevent the flying of sand and dust.
[0062] Specifically, through comparison of multiple different shapes and sizes of openings, under the same wind speed, the same opening rate, the same distance, and the same strip tension, the measured wind speed after passing through different hole groups and the displacement data of the center position of the strip facing the wind are shown in the following table:
[0063] Table 2: Wind speed reduction rate and strip displacement due to wind resistance under different hole shapes
[0064] From the above table, when the elliptical through hole is selected, the wind speed reduction rate is the largest. When the initial wind speed is 10 m / s, the wind speed will be reduced to below 1.8 m / s after passing through a layer of sand barrier strip, which can fully meet the use requirements of wind prevention and sand fixation.
[0065] By comparing a plurality of different sizes of elliptical through holes, under the same wind speed, the same opening rate, the same distance, and the same strip tension, the measured wind speed after passing through different hole groups and the displacement data of the strip windward center position due to wind resistance are shown in the following table:
[0066] Table 3: Wind speed reduction rate and strip displacement due to wind resistance under different hole sizes
[0067] From the above table, the smaller the elliptical through hole, the lower the wind speed after passing through the hole group, and the greater the wind speed reduction rate. However, the displacement of the strip due to wind resistance is also greater. Therefore, considering the wind speed reduction rate and the load of the strip due to wind resistance, the elliptical through hole with a major axis of 14 mm and a minor axis of 3 mm can effectively reduce the wind speed while reducing the load of the strip, and ensure the stability of the entire wind prevention and sand fixation barrier.
[0068] After determining the size of the elliptical through hole, the opening rate is verified. The opening rate of the sand barrier strip in the prior art is usually 35% to 50%. The wind speed reduction effect of the strip with the same hole type and different opening rates is compared by experiment, as shown in the following table:
[0069]
[0070] Table 4: Wind speed reduction rate and strip displacement due to wind resistance under different opening rates
[0071] From the experimental data in the above table, when the opening rate is higher than 40%, the higher the opening rate, the smaller the wind speed reduction rate. When the opening rate is lower than 40%, the lower the opening rate, the smaller the wind speed reduction rate. The lower the opening rate, the higher the material cost of the strip. Considering the windproof effect and cost, the opening rate is selected to be 38% to 42%, and 40% is preferably selected.
[0072] The application also discloses a wind prevention and sand fixation barrier construction method, which is applied to the wind prevention and sand fixation barrier produced by the production process of the application.
[0073] The sand surface of the construction area is cleaned and leveled, which can be done by mechanical or manual methods, to ensure that there are no large stones, shrubs, and prominent pits or bumps that affect the construction site obstacles.
[0074] Draw several horizontal and vertical construction lines on the sand surface of the construction area. The depth of the horizontal and vertical construction lines is 10-20 mm, the interval between adjacent two horizontal construction lines is 800 mm, and the interval between adjacent two vertical construction lines is 800 mm. When drawing the lines, try to make the horizontal construction lines perpendicular to the local main wind direction to achieve the purpose of directly blocking the wind. The horizontal and vertical construction lines intersect with each other to form several intersection points.
[0075] Insert anchor rods 10 at intervals between several intersection points on the same horizontal construction line, and the anchor rods 10 of adjacent two horizontal construction lines are arranged in staggered positions. When installing, the end of the anchor rod 10 without a slot is inserted vertically into the sand, and the insertion depth is appropriate for the entire non-slotted part to be submerged in the sand. When inserting, ensure that the slot length direction of the through slot 11 in the anchor rod 10 on the first horizontal construction line is consistent with the length direction of the horizontal construction line, and the slot length direction of the through slot 11 in the anchor rod 10 on the outermost side of the other horizontal construction line is perpendicular to the length direction of the horizontal construction line. The slot length direction of the through slot 11 in the anchor rod 10 on the outermost side of the other horizontal construction line is arranged perpendicular to the length direction of the horizontal construction line, which on one hand facilitates the turning of the windbreak and sand fixation belt 20 between adjacent two rows of anchor rods 10, allowing the windbreak and sand fixation belt 20 to be continuous when arranged, and on the other hand can be used for connecting with the surrounding windbreak and sand fixation barrier.
[0076] The windbreak and sand fixation belt 20 is unfolded in a Z-shaped direction with the anchor rod 10 as the turning point and inserted into the through slot 11 of the corresponding anchor rod 10. When arranging, the windbreak and sand fixation belt 20 should be pulled tight, with its upper edge 10 mm lower than the top end of the anchor rod 10, and the longitudinal ribs on the windbreak and sand fixation belt 20 located in the through slot 11 of the anchor rod 10. Then, a fixed ring 30 is sleeved on the top end of the anchor rod 10. When two windbreak and sand fixation belts are installed in one anchor rod, the windbreak and sand fixation belt between the previous anchor rod should be ensured to be pulled tight, and the corresponding longitudinal ribs of the two windbreak and sand fixation belts at the overlapping position should be located in the anchor rod. When only one windbreak and sand fixation belt is inserted in one anchor rod, a second windbreak and sand fixation belt is not needed to be inserted to ensure that the windbreak and sand fixation belt between the previous anchor rod is pulled tight, and the longitudinal rib of the windbreak and sand fixation belt is located in the anchor rod.
[0077] The two half-shanks of the anchor rod 10, which are divided by the through slot 11 at the top end of the anchor rod 10, are deformed outwardly to prevent the fixing ring 30 from falling off from the slotted end of the anchor rod 10, and then the top end of the anchor rod 10 is hammered to make the lower edge of the wind and sand fixing belt 20 sink into the sand, so as to enhance the connection strength between the whole structure and the sand surface and keep the whole in a good protection state. For the anchor rod 10 on which only one wind and sand fixing belt 20 is installed at the periphery, if it is still needed to be connected with other wind and sand fixing barriers around, the top end of the anchor rod 10 is not temporarily deformed outwardly, so as to be connected with other wind and sand fixing barriers around.
[0078] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-described embodiments. Any technical solutions falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled in the art, some improvements and refinements without departing from the principles of the present application shall also be considered as falling within the protection scope of the present application.
Claims
1. A process for the production of windbreak and sandtrap, characterized by: The windbreak and sand fixation barrier comprises an anchor rod (10), a windbreak and sand fixation belt (20) and a fixing ring (30), the anchor rod (10) is provided with a radial through slot (11) in the middle of the top end, and the production steps of the windbreak and sand fixation belt (20) are as follows: Ingredients: taking polypropylene as raw material, adding 5% black masterbatch, 0.075% toughening agent, 0.2% rigidifying agent and 0.1% light stabilizer, and fully stirring; Molding: plasticizing extrusion through a single screw extruder, and then rolling through a rolling device to form a plate with uniform thickness and smooth surface; Punching: punching a plurality of rows of uniformly arranged forming holes on the molded plate through a special punching die; Stretching: longitudinally stretching the punched plate through a multi-roller stretching machine to form a strip at a stretching ratio of 3-4 times, and the stretching temperature is 126±1℃; Slitting: slitting the stretched and molded strip into a longitudinal continuous strip with a set width through an online slitting method; Winding: winding the stretched and slitted strip into a roll after cooling.
2. The production process of the wind-preventing sand-fixing barrier according to claim 1, characterized in that: The carbon black content of the black masterbatch added in the ingredient step is ≥42%, the carbon black particle size is 20-60nm, and the ash content is ≤0.5%.
3. The production process of windbreak and sand-fixing barrier according to claim 1, characterized in that: The size of the forming hole in the punching step is 1.42*1.42mm, and the stretching ratio in the stretching step is 3.2 times.
4. The production process of the wind-preventing sand-fixing barrier according to claim 3, characterized in that: The molded windbreak and sand fixation belt (20) is in the form of a strip, and the surface of the strip is provided with a plurality of rows of spaced oval through holes (21), the long axis of the oval through hole (21) is 14mm, the short axis is 3mm, and the opening rate of the strip surface is 38%-42%.
5. The production process of windbreak and sand-fixing barrier according to claim 1, characterized in that: The anchor rod (10) is in the form of a circular tube, and the molding method is one of the following methods: 1) integrally molding through injection molding process by using polyester, polypropylene, ABS or other high molecular materials; 2) selecting a galvanized steel pipe, a stainless steel pipe or other metal materials to make by cutting processing; 3) molding by using resin and high-strength fiber materials through molding.
6. A method for constructing a windbreak and sand-fixing barrier, characterized in that the windbreak and sand-fixing barrier is produced by the method according to any one of claims 1 to 6. The method comprises the following steps: Cleaning and leveling the sand surface of the construction area; Drawing a plurality of horizontal and vertical construction lines on the sand surface of the construction area to form a plurality of intersection points; Inserting the anchor rod (10) into the through slot (11) of the anchor rod (10) at the intersection points on the same horizontal construction line, and arranging the anchor rods (10) of the adjacent two horizontal construction lines in a staggered manner; Unfolding the windbreak and sand fixation belt (20) in a Z-shaped direction around the anchor rod (10) as a turning point and inserting it into the through slot (11) of the corresponding anchor rod (10), and sleeving the fixing ring (30) on the top end of the anchor rod (10); Flipping or bulging the two halves of the anchor rod (10) divided by the through slot (11) at the top end of the anchor rod (10), and hammering the top end of the anchor rod (10) to make the lower edge of the windbreak and sand fixation belt (20) sink into the sand.
7. The method according to claim 6, wherein the method is characterized by: The slot length direction of the through slot (11) in the anchor rod (10) on the first horizontal construction line is consistent with the length direction of the horizontal construction line, and the slot length direction of the through slot (11) in the anchor rod (10) on the outermost side of the other horizontal construction line is perpendicular to the length direction of the horizontal construction line.