A new type of windbreak and sand-fixing barrier
By staggered arrangement of anchor bolts and Z-shaped windbreak and sand-fixing belts, combined with elliptical through holes, the problem of grass checkerboard sand barriers being prone to bending under high wind speeds was solved, achieving better wind speed dispersion and sand barrier stability, and improving the windbreak and sand-fixing effect and lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI SHUANGCHENG NEW MATERIAL TECH CO LTD
- Filing Date
- 2025-08-11
- Publication Date
- 2026-07-17
AI Technical Summary
Existing straw checkerboard sand barriers are prone to bending and increasing gaps under high wind speeds, which reduces their wind speed reduction effect and results in poor lifespan and effectiveness in preventing wind erosion and fixing sand.
The system employs staggered, spaced anchor bolts and Z-shaped windbreak and sand-fixing belts. The anchor bolts have through grooves, and the windbreak and sand-fixing belts are inserted into the through grooves. The belts have elliptical through holes with an opening rate of 38% to 42%, forming an interlaced protective structure that disperses wind force and reduces wind speed.
It effectively disperses wind force, reduces wind speed, reduces sand and dust movement, prevents sand and dust from flying, and improves the effect of windbreak and sand fixation and service life.
Smart Images
Figure CN224514085U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of windbreak and sand fixation technology, and in particular to a novel windbreak and sand fixation barrier. Background Technology
[0002] The increasing desertification of land poses a serious threat to human survival, making windbreak and sand fixation an urgent task. In recent decades, with the deepening understanding of deserts, desertification control has begun to show some results, and many types of sand-blocking and sand-fixing engineering measures have emerged. Common windbreak and sand-fixing methods and measures include afforestation, setting up sand barriers, planting protective forests, installing windbreak and dust suppression nets, grassland cover, forest belt planting, geotextile covering, and gravel sand fixation. Among these, the windbreak and sand-fixing barrier scheme is widely used in various windbreak and sand control projects due to various factors such as construction period, time to see results, and construction cost.
[0003] Currently, the most widely used windbreak and sand-fixing barrier scheme is the straw checkerboard sand barrier. Due to the limitations of construction technology and the performance of the materials themselves, the straw stalks will bend when the wind speed is high, and the gaps between the upright straw stalks will increase. The effect of reducing wind speed will be greatly reduced, and this situation will become more and more serious over time. Its windbreak and sand-fixing effect and service life cannot fully meet the needs. Summary of the Invention
[0004] To address the aforementioned problems, this utility model provides a novel windbreak and sand-fixing barrier.
[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a novel windbreak and sand-fixing barrier, comprising several rows of anchor rods arranged in a staggered manner, wherein the anchor rods are provided with radially arranged through grooves from the middle of the top to the bottom, and the anchor rods are connected by windbreak and sand-fixing strips that extend in a Z-shape, wherein the windbreak and sand-fixing strips are inserted into the through grooves of the corresponding anchor rods, and a fixing ring is also fitted on the top of the anchor rods.
[0006] Furthermore, the windbreak and sand-fixing belt is strip-shaped, and its surface has several rows of spaced through holes along its length.
[0007] Furthermore, the through hole is elliptical in shape, with a major axis of 14mm and a minor axis of 3mm.
[0008] Furthermore, the perforation rate of the through holes on the surface of the windbreak and sand-fixing belt is 38% to 42%.
[0009] Furthermore, the depth of the channel is greater than the width of the windbreak and sand-fixing belt.
[0010] In summary, this utility model has the following beneficial effects: 1. In this application, by setting up several rows of anchor bolts that are staggered and spaced apart, and cooperating with the windbreak and sand-fixing belt to spread out in a Z-shaped direction, the windbreak and sand-fixing belt forms 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 wind and sand flow. 2. In this application, by arranging elliptical through holes at intervals on the windbreak and sand-fixing belt, the wind generated by the external environment can pass through the belt and reduce the wind speed. When the wind generated by the external environment passes through the belt, it forms airflows that interfere with each other in multiple directions (up, down, left, right) on the inner side of the belt, so as to achieve the effect of strong wind on the outside, weak wind on the inside, light wind on the outside, and no wind on the inside, thus preventing sand and dust from flying. Attached Figure Description
[0011] Figure 1 This is a construction layout diagram of the windbreak and sand-fixing barrier according to an embodiment of the present utility model, wherein the arrows indicate the layout direction of the windbreak and sand-fixing belt; Figure 2 This is a schematic diagram of the anchor rod and fixing ring according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the planar structure of the windbreak and sand-fixing belt according to an embodiment of this utility model; In the diagram: 10, anchor bolt; 11, through groove; 20, windbreak and sand-fixing strip; 21, through hole; 30, fixing ring. Detailed Implementation
[0012] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0013] like Figure 1-3 As shown in the figure, this application discloses a windbreak and sand-fixing barrier, including a plurality of anchor rods 10, a windbreak and sand-fixing belt 20 and a fixing ring 30.
[0014] Anchor bolts 10 are arranged in several rows at staggered intervals, and have an overall cylindrical structure. They can be integrally molded from polyester, polypropylene, ABS, or other polymer materials through injection molding; they can also be made from galvanized steel pipes, stainless steel pipes, or other metal materials through cutting and processing; or they can be molded from resin and high-strength fiber materials. The lower half of the anchor bolt 10 is inserted into the ground for fixation; the upper half has radially arranged through grooves 11 from the middle of the top downwards, which are used to fix the windbreak and sand-fixing strip 20. The depth of the through grooves 11 is greater than the width of the windbreak and sand-fixing strip 20, so that the windbreak and sand-fixing strip 20 can be completely placed within the through grooves 11.
[0015] The windbreak and sand-fixing strip 20 is a strip formed by stretching polypropylene composite material. It unfolds in a Z-shape, with several rows of anchor bolts 10 connected sequentially, creating a staggered protective structure on the sand surface. This effectively disperses wind force, reduces the direct impact of wind speed on the sand surface, and minimizes sand movement. The surface of the windbreak and sand-fixing strip 20 has several rows of spaced-apart through-holes 21 along its length. Each through-hole 21 is elliptical, with a major axis of 14mm and a minor axis of 3mm. The opening rate of the through-holes 21 on the surface of the windbreak and sand-fixing strip 20 is 38%–42%. By arranging the elliptical through-holes 21 at intervals on the windbreak and sand-fixing strip, external winds can pass through the strip and their speed reduced. When external winds pass through the strip, multiple airflows in multiple directions (up, down, left, right) are created on the inner side of the strip, resulting in strong winds on the outside, weak winds on the inside, light winds on the outside, and no wind on the inside, thus preventing sand and dust from flying.
[0016] The production steps of windbreak and sand-fixing belt 20 are as follows: Ingredients: Polypropylene is used as the raw material, with the addition of 5% black masterbatch, 0.075% toughening agent, 0.2% stiffening agent, and 0.1% light stabilizer. The mixture is thoroughly stirred, and other functional additives can be added as needed. The black masterbatch contains ≥42% carbon black, preferably 42%, with a carbon black particle size of 20–60 nm, and the ash content is ≤0.5%. By adding black masterbatch, toughening agent, stiffening agent, and light stabilizer, the anti-aging properties and wind load-bearing capacity of the strip can be effectively improved.
[0017] Molding: Plasticized extrusion is performed by a single screw extruder, and then rolled by a roller press to form a sheet with uniform thickness and a smooth surface.
[0018] Punching: Using a special punching die, several rows of evenly spaced forming holes are punched into the formed sheet metal. The size of the forming holes is 1.42×1.42mm.
[0019] Stretching: The punched sheet is longitudinally stretched into strips using a stretching machine at a stretching ratio of 3-4 times, with a preferred stretching ratio of 3.2 times; the stretching temperature is 126±1℃ to ensure the uniformity of the stretching ratio.
[0020] To achieve high longitudinal tensile strength, uniaxially oriented polypropylene products typically use a stretch ratio of 11 to 12. This yields a longitudinal tensile strength of around 350 MPa, but significantly increases transverse brittleness, reducing the tensile strength to below 25 MPa, lower than the raw material's tensile strength, making it prone to brittle fracture during bending. To ensure suitable load-bearing capacity in both longitudinal and transverse directions while maintaining a certain level of resistance to brittle fracture, various stretch ratios were tested, as detailed in the table below:
[0021] Table 1: Comparison of longitudinal and transverse tensile strength and brittleness of strips at different draw ratios When a uniaxial stretch ratio of 3-4 is selected, the transverse tensile strength of the strip increases significantly, and it will not break when folded, giving the strip excellent resistance to brittle fracture. At a uniaxial stretch ratio of 3.2, 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, fully meeting the requirements for strip use.
[0022] Slitting: The stretch-formed strip is slitting in the online width to cut it into longitudinal continuous strips of a set width, ensuring that the width tolerance of the strip is controlled within ±1mm, and guaranteeing the accuracy of the fit between the strip and the anchor rod 10 during construction.
[0023] Winding: After the stretched and slit strips have cooled, they are wound into rolls to form windbreak and sand-fixing strip rolls 20, which are convenient for later use.
[0024] Specifically, by comparing various openings of different shapes and sizes, under the same wind speed, same opening ratio, same distance, and same strip tension, the wind speed after passing through different sets of openings, as well as the displacement data of the windward center position of the strip, are shown in the table below:
[0025] Table 2: Comparison of wind speed reduction rate and strip displacement due to wind resistance under different aperture shapes As shown in the table above, the wind speed reduction rate is the greatest when elliptical through holes are selected. The wind with an initial speed of 10 m / s will be reduced to below 1.8 m / s after passing through a layer of sand barrier strips, which can fully meet the requirements for windbreak and sand fixation.
[0026] By comparing various elliptical through-holes of different sizes, under the same wind speed, same opening ratio, same distance, and same strip tension, the wind speed after passing through different hole groups, as well as the displacement data of the windward center position of the strip, are shown in the table below:
[0027] Table 3: Comparison of wind speed reduction rate and strip displacement due to wind resistance under different sized orifices As shown in the table above, the smaller the opening of 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 both the wind speed reduction rate and the load formed by the strip due to wind resistance, the elliptical through-hole with a major axis of 14mm and a minor axis of 3mm can effectively reduce the wind speed while reducing the load on the strip, thus ensuring the stability of the entire windbreak and sand-fixing barrier.
[0028] After determining the size of the elliptical through-holes, the opening ratio was verified. In existing technologies, the opening ratio of sand barrier strips is usually between 35% and 50%. The wind speed reduction effects of strips with the same hole shape but different opening ratios were experimentally compared, as shown in the table below:
[0029] Table 4: Comparison of wind speed reduction rate and strip displacement due to wind resistance under different opening ratios The test data in the table above shows that when the opening ratio is higher than 40%, the wind speed reduction rate is smaller; when it is lower than 40%, the wind speed reduction rate is smaller; however, the lower the opening ratio, the higher the material cost of the strip. Considering both windproof effect and cost, an opening ratio of 38% to 42% is selected, with 40% being the preferred value.
[0030] The fixing ring 30 is a circular structure used to be fitted onto the top of the anchor rod 10. After the windbreak and sand-fixing belt 20 is installed, tools can be used to turn the two halves of the anchor rod 10, which are divided by the through groove 11, outward or expand them so that the fixing ring 30 cannot fall off the anchor rod 10, thereby fixing the windbreak and sand-fixing belt 20 in the through groove 11 to prevent the windbreak and sand-fixing belt 20 from loosening or falling off under the action of wind.
[0031] The working principle of a novel windbreak and sand-fixing barrier in this application embodiment is as follows: The sandy ground in the construction area should be cleared and leveled using mechanical or manual methods, ensuring that there are no large rocks, shrubs, or protruding pits or bumps that could hinder construction.
[0032] Draw several horizontal and vertical construction lines on the sandy ground in the construction area. The depth of the horizontal and vertical construction lines should be 10-20 mm, with an 800 mm interval between adjacent horizontal construction lines and an 800 mm interval between adjacent vertical construction lines. When drawing the lines, try to make the horizontal construction lines perpendicular to the direction of the prevailing wind to achieve the purpose of frontal wind resistance. The horizontal and vertical construction lines should intersect each other to form several intersection points.
[0033] Anchor bolts 10 are inserted at intervals at several intersections along the same transverse construction line, with the anchor bolts 10 on adjacent transverse construction lines staggered. During installation, the ungrooved end of the anchor bolt 10 is vertically inserted into the sand, with the insertion depth ensuring the ungrooved portion is completely submerged. When inserting, ensure that the groove length of the through-groove 11 within the anchor bolt 10 on the first transverse construction line is aligned with the length of the transverse construction line, while the groove length of the through-groove 11 within the outermost anchor bolt 10 on other transverse construction lines is perpendicular to the length of the transverse construction line. This arrangement of the through-groove 11 within the outermost anchor bolt 10 on other transverse construction lines perpendicular to the length of the transverse construction line facilitates the turning of the windbreak and sand-fixing belt 20 between adjacent rows of anchor bolts 10, ensuring continuity during installation; it also allows for connection with surrounding windbreak and sand-fixing barriers.
[0034] The windbreak and sand-fixing strip 20 is unfolded in a Z-shape with the anchor rod 10 as the turning point and inserted into the through groove 11 of the corresponding anchor rod 10. The windbreak and sand-fixing strip 20 should be taut during installation, with its upper edge 10mm lower than the top of the anchor rod 10, and ensuring that the longitudinal ribs on the windbreak and sand-fixing strip 20 are located within the through groove 11 of the anchor rod 10. Then, a fixing ring 30 is fitted onto the top of the anchor rod 10. Specifically, during installation, when two windbreak and sand-fixing strips are installed in one anchor rod, it is necessary to ensure that the windbreak and sand-fixing strip between the two anchor rods is taut, and that the corresponding longitudinal ribs of the two windbreak and sand-fixing strips at the overlapping position are located within the anchor rod. When only one windbreak and sand-fixing strip is installed in one anchor rod, it is not necessary to install a second windbreak and sand-fixing strip, ensuring that the windbreak and sand-fixing strip between the two anchor rods is taut, and that the longitudinal ribs of the windbreak and sand-fixing strip are located within the anchor rod. For anchor rods 10 that have been secured to the windbreak and sand-fixing strip 20, the two halves of the anchor rod 10, divided by the through groove 11, are turned outward or deformed to prevent the fixing ring 30 from falling off the slotted end of the anchor rod 10. Then, the top of the anchor rod 10 is hammered to make the lower edge of the windbreak and sand-fixing strip 20 sink into the sand, thereby enhancing the connection strength between the overall structure and the sandy ground and maintaining a good protective state. For anchor rods 10 located around which only one windbreak and sand-fixing strip 20 has been installed, if it is necessary to connect with other windbreak and sand-fixing barriers in the surrounding area, the top of the anchor rod 10 is not turned outward or deformed temporarily to facilitate connection with other windbreak and sand-fixing barriers in the surrounding area.
[0035] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.
Claims
1. A new type of windbreak and sand-fixing barrier, characterized in that: It includes several rows of staggered and spaced anchor rods (10), each anchor rod (10) having a radially arranged through groove (11) from the middle of the top end downwards, the anchor rods (10) being connected by a windbreak and sand-fixing strip (20) that unfolds in a Z-shape, and the windbreak and sand-fixing strip (20) being inserted into the through groove (11) of the corresponding anchor rod (10), and a fixing ring (30) being fitted on the top end of each anchor rod (10).
2. The novel windbreak and sand-fixing barrier according to claim 1, characterized in that: The windbreak and sand-fixing belt (20) is strip-shaped, and its surface has several rows of spaced through holes (21) along its length.
3. The novel windbreak and sand-fixing barrier according to claim 2, characterized in that: The through hole (21) is elliptical in shape, with a major axis of 14 mm and a minor axis of 3 mm.
4. The novel windbreak and sand-fixing barrier according to claim 2, characterized in that: The perforation rate of the through holes (21) on the surface of the windbreak and sand-fixing belt (20) is 38% to 42%.
5. The novel windbreak and sand-fixing barrier according to claim 1, characterized in that: The depth of the channel (11) is greater than the width of the windbreak and sand-fixing belt (20).