Sand fences and their sand traps

Abstract

The application discloses a sand barrier with a sand-filled bottom bag and a bagged sand ridge type wing arranged on the bottom bag, and the bagged sand ridge type wing is connected with the bottom bag. The bagged sand ridge type wing and the bottom bag can be stitched and bonded, or are formed by relying on the internal transverse band of the bottom bag, and the bag opening is gathered and tied. The matched sand chute is provided with multiple parallel funnel outlets, and the funnel outlet is provided with a clamping device capable of being opened and closed to fix the bag opening. The application replaces the traditional hard plastic wing with the bagged sand ridge type wing, greatly reduces the heightening cost, significantly improves the height-width ratio of the sand barrier, and has no vacuum air leakage risk. The multiple-outlet funnel improves the sand filling efficiency and is suitable for large-area sand land treatment.

Description

Technical Field

[0001] This invention belongs to the field of sand control and desertification prevention technology, and relates to sand barriers and supporting construction components, specifically a ridge sand barrier and a supporting special sand bucket. Background Technology

[0002] Sandbag-type grid sand barriers are the mainstream engineering measures for desertification control and sandy land windbreak and sand fixation. They have the advantages of convenient installation, strong environmental adaptability, stable sand fixation effect and low engineering cost, and are widely used in desert and sandy land degradation ecological restoration projects.

[0003] The existing national standard GB / T 16453.5-2008 specifies the dimensions of sand barriers: the standard grid size is 1m×1m; in areas with an average annual wind speed >8m / s, the grid size should be increased to 0.8m×0.8m; in flat, low-wind areas, larger grid sizes of 1.5m×1.5m and 2m×2m can be used. Currently, commonly used sand barriers in engineering projects are divided into three categories: straw grid sand barriers, nylon mesh grid sand barriers, and sandbag grid sand barriers. Straw grid sand barriers are limited by the supply of straw raw materials, making large-scale promotion difficult; sandbag grid sand barriers have a material cost that is more than 20% lower than nylon mesh sand barriers, making them the mainstream application solution for desertification control projects.

[0004] Currently, the commonly used forming heights for conventional circular tube sandbag sand barriers under normal pressure are 90mm, 120mm, 150mm, and 200mm. After natural filling, the circular sandbags will collapse into an elliptical shape due to their own weight, with a stable height-to-width ratio (H / L) generally between 0.35 and 0.45, rarely exceeding the upper limit of 0.5. Simply increasing the diameter of the sandbag tube to increase the height of the sand barrier would simultaneously and significantly increase the amount of sand filling, fabric consumption, transportation, and construction costs, making large-scale application economically unfeasible. Figure 8 As shown, conventional low sand barriers have insufficient effective sand-blocking height, and sand particles carried by wind and sand can easily overturn the top of the sand barriers, thus limiting the sand-fixing effect.

[0005] The existing sand barrier heightening schemes have the following obvious shortcomings.

[0006] Firstly, the inventor's 3D printing sand barrier technology (CN116446368A) involves mixing mortar on-site to form sand barriers to increase their height. However, this results in high consumption of cement and water resources, high material transportation costs, poor environmental friendliness during construction, and difficulty in widespread adoption.

[0007] Secondly, the applicant's vacuum seedling sand barrier (application number 2026108651499): relies on vacuum negative pressure to shape the sandbags to increase their height, which requires high sealing technology for the bag body, and is prone to air leakage and failure after construction, resulting in poor structural stability.

[0008] Thirdly, the use of rigid wings to increase the height of sand barriers: The official WeChat account of the China Association for Desertification Control and Sand Industry published a document titled "Research and Application of Winged Bag Sand Barrier Laying Machinery," which states that winged bag sand barriers consist of a base bag and wings, with the wings being rigid plastic wings that can stand upright. When the wing height is 100mm, wind erosion is reduced by 21% compared to the control sand barrier. Our research found that the purchase cost of a 200mm diameter sand barrier bag is 0.8 yuan / m, while adding 100mm high wings to increase the height increases the purchase cost to 2.2 yuan / m. Therefore, increasing the sand barrier height by 100mm through wings increases the cost to 2.75 times the original cost, equivalent to a 100mm high wing cost of 1.4 yuan / m (2.2 yuan / m - 0.8 yuan / m). The applicant also studied various existing utility model patents, including CN221721593U "An Intermittent Feather Bag Sand Barrier", CN221740993U "A Windproof Fence-Type Feather Bag Sand Barrier", CN213508400U "A Breathable Feather Bag Sand Barrier", CN213508401U "An Open Feather Bag Sand Barrier", CN210597261U "A Breathable Feather Bag Sand Barrier", and CN207348041U "A Feather Bag Sand Barrier", which use wings to increase the height of sandbag sand barriers. The applicant found that they all have a common drawback: the cost of increasing the height of the sand barrier by using wings is very high.

[0009] In summary, existing technologies cannot increase the effective sand-blocking height of sand barriers with only a slight increase in cost, and there is a lack of supporting structures that can simultaneously achieve sand fixation. These are technical problems that urgently need to be solved in current sand control and desertification prevention projects. Summary of the Invention

[0010] The purpose of this invention is to overcome the shortcomings of existing sand barriers, such as high cost of increasing height and easy failure of vacuum seedling sand barrier structures. The first aspect is to provide a ridge-feather sand barrier that increases the overall height of the sand barrier while controlling the cost slightly. The second aspect is to provide a multi-outlet sand bucket adapted to the construction of the ridge-feather sand barrier, thereby improving the efficiency of on-site sand filling construction.

[0011] To achieve the above objectives, the first aspect of the present invention provides a sand barrier, comprising a bottom bag filled with sand and wings disposed above the bottom bag, characterized in that: the wings are bagged sand barrier-type wings disposed above the bottom bag and connected and fixed to the bottom bag.

[0012] As a preferred option, the connection structure between the bagged sand embankment and the bottom bag can be any of the following.

[0013] Option 1: The bottom of the bagged sand embankment is sewn to the top of the bottom bag using stitching, waterproof adhesive, hot pressing, or plastic buckle fastening.

[0014] Option 2: A horizontally pulling layer, such as a strap, mesh, or fabric, is installed inside the bottom bag at the top. This layer gathers the upper space of the bottom bag, forming a raised sand ridge. Among the three types of pulling layers—strap, mesh, and fabric—the strap uses the least material, followed by the mesh, and then the fabric is the most wasteful.

[0015] Option 3: After the bottom of the bagged sand embankment overlaps with the top of the bottom bag, use nylon straps to wrap and secure it.

[0016] As a preferred option, the openings of the bagged sand embankments and the bottom bag are gathered and combined, and then sealed together with cable ties or other means to complete the sand filling and sealing operation in a unified manner.

[0017] This invention is a technological innovation that replaces traditional rigid plastic wings with bagged sand barriers. This allows the overall height-to-width ratio (H / L) of the sand barrier after it is fully filled and formed to easily exceed 0.5, or even reach more than 1. It cleverly solves the technical bottleneck that the height-to-width ratio (H / L) of traditional sandbag-type sand barriers is difficult to exceed 0.5 after collapse.

[0018] In this invention, D represents the height of the bottom bag after filling with sand, and d represents the height of the sand-filled embankment. The embankment height and the bottom bag height satisfy d / D ≤ 0.50, preferably d / D ≤ 0.34. If d / D is greater than 0.50, and the lateral width of the sand-filled embankment is too large, it is prone to lateral collapse after filling with sand, making it difficult to stabilize itself, and the heightening effect is greatly reduced. When d / D is controlled to ≤ 0.34, the sand embankment is narrow and high, with excellent sand-blocking efficiency and low increase in fabric material consumption.

[0019] In this invention, S represents the width of the bagged sand embankment after being filled with sand. After filling with sand, the width S of the bagged sand embankment and the width L of the bottom bag satisfy S / L≤0.50, preferably S / L≤0.34, and more preferably S / L≤0.25. This results in a narrow and high sand embankment, leading to better sand-blocking efficiency and lower material consumption.

[0020] Preferably, the upper bagged sand embankment and the lower bottom bag form a self-stabilizing structure with a convex cross-section.

[0021] A second aspect of the present invention provides a sand bucket adapted to a sand barrier, comprising an upper feed hopper and a lower diversion section; the diversion section is integrally formed or separately assembled with a plurality of funnel outlets arranged in parallel; each funnel outlet is fixedly provided with an openable clamp on its outer wall, the clamp being used to clamp and fix the bag opening, so that the bag opening and the funnel outlet are respectively connected to achieve simultaneous filling of sand into multiple bag openings, that is, a worker can shovel sand and simultaneously fill multiple bags such as bottom bags and edge bags, thereby improving work efficiency.

[0022] Preferably, the clamp is any one of the following: elastic clamp, plastic buckle, elastic strap, clamp, or magnetic pressure block.

[0023] In this invention, the bottom bags and bagged sand embankments use a general-purpose anti-aging flexible fabric for sand barrier engineering, such as polypropylene woven fabric, polyethylene woven fabric, polyethylene geotextile, polyester woven fabric, or composite geomembrane. The fabric weight, tensile strength, abrasion resistance, and anti-aging parameters are conventionally selected based on the regional wind and sand intensity, and can be freely adjusted by those skilled in the art according to engineering requirements. The preferred fabric weight is 120-250 g / m², with a longitudinal tensile strength ≥12 kN / m, possessing outdoor anti-aging performance for more than 5 years, and suitable for long-term burial in sandy areas.

[0024] Compared with the prior art, the present invention has the following beneficial effects.

[0025] Firstly, the increased cost makes it suitable for large-scale promotion: Increasing the height of traditional rigid plastic wings by 100mm increases the cost of sand barrier materials to 2.75 times the original cost. This invention uses a bagged sand barrier made of the same material as the base bag, protruding from the base bag. Increasing the height by 100mm requires only a small amount of additional stitching or tensioning layers, resulting in minimal increase in the overall cost of the sand barrier. The increased cost significantly reduces the cost of sand control projects. Actual measurements show that the increased cost of this invention is as low as 3.57% of the cost of current wing designs.

[0026] Secondly, the structure is stable and there is no risk of air leakage and failure: Compared with vacuum seedling sand barriers, this invention does not require airtight vacuum bags, does not rely on negative pressure for shaping, and only relies on the self-weight of the sand inside the sandbag to form the shape. There is no problem of air leakage at the seal or structural collapse, and the stability is stronger for long-term use in the field.

[0027] Thirdly, the high molding height and significant sand-blocking and sand-fixing effect: The one-piece molding structure can increase the total height-to-width ratio (H / L) of the sand barrier to over 1, greatly increasing the effective sand-blocking height and reducing the amount of sand that winds and sands can carry over the sand barrier. The surface sand-fixing and deep sand-blocking effects are better than those of traditional flat sandbag sand barriers.

[0028] Fourth, high construction efficiency: The multi-outlet sand bucket can simultaneously fill the bagged sand embankment and bottom bag with sand, filling both the upper and lower bags at once, thereby shortening the on-site construction time. Attached Figure Description

[0029] Figure 1 This is a frontal schematic diagram of a single sand barrier in this invention, used to demonstrate the integrated external structure of the bottom bag and the bagged sand barrier.

[0030] Figure 2 for Figure 1 Schematic diagram of the AB section structure.

[0031] Figure 3 This is a schematic diagram of the overall structure of the sand barrier formed by the built-in strap in this invention, used to show the integrated external structure of the bottom bag and the bagged sand barrier.

[0032] Figure 4 for Figure 3Schematic diagram of the E-F cross-section structure.

[0033] Figure 5 This is a schematic diagram of the overall structure of the double-outlet sand hopper in the present invention.

[0034] Figure 6 This is a schematic diagram of the double-outlet sand hopper in the present invention for the synchronous sand filling operation while clamping two bag mouths.

[0035] Figure 7 This is a schematic diagram of the cross-section structure of a sandbag for a ridge-feather sand barrier in the present invention.

[0036] Figure 8 It is a schematic diagram of the actual scene comparison of the formation of an existing conventional round tube sandbag sand barrier, used to show that the effective sand-blocking height of the current low sand barrier is insufficient, and the sand grains carried by the sand flow are very easy to翻越 the top of the sand barrier.

[0037] Explanation of reference numerals: 1-bottom bag, 2-bagged sand ridge, 3-sewing thread, 4-filled sand material, 5-tension layer, 6-bag mouth, 7-feed hopper, 8-hopper outlet, 9-magnetic pressing block, 10-top bag. Specific implementation manners

[0038] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The protection scope of the present invention is not limited to the following embodiments.

[0039] Embodiment 1 Sewn and integrally formed ridge-feather sand barrier.

[0040] As Figure 1 、 Figure 2 shown, a ridge-feather sand barrier includes a bottom bag 1 filled with sand material 4, and a bagged sand ridge 2 sewn to be connected to the bottom bag 1 above the bottom bag 1.

[0041] The finished fabric perimeter of the bottom bag 1 is 628 mm, and the theoretical diameter of the circular cross-section is 200 mm; the fabric perimeter of the bagged sand ridge 2 is 220 mm, and the theoretical diameter of the circular cross-section is 70 mm. Both use the same polypropylene anti-aging woven fabric. The bottom of the bagged sand ridge 2 is hermetically sewn to the upper part of the bottom bag 1 along the sewing thread 3 to form an integrated structure.

[0042] After the sand filling is completed, the bag mouths 6 of the bottom bag 1 and the bagged sand ridge 2 are收拢 and merged and then uniformly tied and sealed. The measured height D of the bottom bag 1 is 180 mm, and the height d of the bagged sand ridge 2 is 30 mm, d / D≈0.167, which meets the preferred range d / D≤0.34; the upper bagged sand ridge 2 and the lower bottom bag 1 form a stable structure that can stand on its own with a cross-section of "凸" character; the overall total height H of the sand barrier = D + d = 210 mm, and the bottom width L after the bottom bag 1 is laid is 207.4 mm. The overall height-width ratio H / L≈1.0125, which is much higher than the stable height-width ratio of 0.35-0.45 of traditional sandbags.

[0043] This embodiment does not require rigid plastic sheets. The height-increasing part shares the same fabric as the bottom bag 1, and the material cost per unit length increases by only 35%, which is far lower than the cost increase of the current wings to 2.75 times that of the original sand barrier.

[0044] Example 2: Built-in self-forming ridge and sand barrier with built-in straps.

[0045] like Figure 3 , Figure 4 As shown, this embodiment does not use a sewn-on split sand ridge. Instead, multiple parallel tension layers 5, such as drawstrings, are arranged horizontally above the inside of the bottom bag 1 with a fabric circumference of 628mm. The drawstrings are made of nylon tape, and one is placed every 40mm along the neck of the bottom bag 1. The two ends of the drawstrings are sewn and fixed to the side walls of the bottom bag 1. Among the three tension layers 5, namely drawstrings, mesh, and fabric, drawstrings use the least material, followed by mesh, and then fabric is the most wasteful.

[0046] During the sand filling process, the tension layer 5, such as the straps, tightens inward to restrain the horizontal expansion of the upper part of the bottom bag 1, automatically narrowing to form a raised bag-filled sand embankment 2; the bag opening 6 is uniformly gathered and tied. The tension layer 5, such as the straps, restricts the horizontal expansion of the upper bag body and forces it to increase in height vertically, eliminating the need for additional sewing of height-increasing structures and simplifying the processing procedures.

[0047] If the bottom bag 1 with a fabric circumference of 628mm is laid and used in the existing manner, the height-to-width ratio H / L is generally 0.35-0.45, so its maximum bag height is 90mm. After using the tension layer 5 such as straps to force vertical increase, the measured ridge height d=86mm, and the measured bag height D=103mm, which together equals the barrier height of 189mm. Therefore, it can be seen that in this embodiment, when the tension layer 5 such as straps is used to force vertical increase, the ridge and sand barrier are increased by 189mm-90mm=99mm.

[0048] This embodiment does not require rigid plastic sheets. The 99mm increase in height (close to 100mm) is achieved by the tension layer 5, such as straps, which restricts the lateral expansion of the upper bag body and forces a vertical increase in height. In summary, this embodiment does not add fabric, but only adds straps costing less than 0.05 yuan, which is equivalent to 3.57% of the current cost of 1.4 yuan / m for a 100mm high wing.

[0049] Another advantage of this embodiment is that the width of the tension layer 5, such as the straps, is minimized so that the width S of the sand-filled sand embankment 2 and the width L of the bottom bag 1 satisfy S / L≤0.50, preferably S / L≤0.34, and more preferably S / L≤0.25. This results in a narrower and higher sand-blocking embankment 2, leading to better sand-blocking efficiency and lower material consumption.

[0050] Example 3: Dual-outlet sand bucket.

[0051] like Figure 5 , Figure 6As shown, a sand bucket for a sand barrier has a large-diameter feed hopper 7 at the top and two funnel outlets 8 connected in parallel at the bottom of the diversion section; magnetic suction blocks 9 are fixed to the outer wall of the funnel outlets 8 as clamps.

[0052] During construction, the two bag openings 6 of a sand barrier are respectively fitted onto the outer walls of the two funnel outlets 8. The bag openings 6 are automatically attracted and clamped by magnetic clamping blocks 9 to prevent the bag openings 6 from falling off during the sand filling process. After the sand is poured in from the feed hopper 7, it is diverted to the two funnel outlets 8, and the filling of the bottom bag 1 and the bagged sand barrier 2 in a sand barrier is completed simultaneously, which doubles the construction efficiency.

[0053] In addition to the magnetic clamp, the clamp can be replaced with elastic clips, buckles, or elastic straps to fit bag openings of different widths.

[0054] Example 4: Sandbags for sand barriers.

[0055] like Figure 7 As shown, a sandbag for a sand barrier includes a bottom bag 1 and a top bag 10 connected above it.

[0056] Furthermore, the top bag 10 and the bottom bag 1 are fixedly connected by stitching with suture 3 or by adhesive bonding; or, the upper space inside the bottom bag 1 is provided with a lateral pulling strap, net or fabric pull layer 5, which forms the connected top bag 10 by narrowing the upper space of the bottom bag 1.

[0057] Furthermore, the opening 6 of the top bag 10 and the opening 6 of the bottom bag 1 are gathered together for overall binding and fixation. The ratio of the perimeter of the top bag 10 to the perimeter of the bottom bag 1 is ≤0.50, preferably ≤0.34, and more preferably ≤0.25.

[0058] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any simple modifications, equivalent structural substitutions, or improvements in construction methods made within the spirit and technical principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A sand barrier, comprising a bottom bag filled with sand and feathers disposed above the bottom bag, characterized in that: The wings are bagged sand ridge-like wings that are set above the bottom bag and fixed to the bottom bag.

2. The sand barrier according to claim 1, characterized in that, The connection between the bagged sand embankment and the bottom bag can be any of the following structures: Firstly, the bottom of the bagged sand embankment is fixed to the top of the bottom bag by sewing with stitching, bonding with waterproof adhesive, hot pressing, or interlocking with plastic buckles; Secondly, the upper part of the bottom bag is equipped with horizontally pulling straps, nets, or fabrics to gather the upper space of the bottom bag, forming a bagged sand embankment that protrudes from the top of the bottom bag; Third, the bottom of the bagged sand embankment overlaps with the top of the bottom bag and is then secured with straps. Fourth, a horizontally pulling layer is provided at the top inside the bottom bag. The pulling layer constricts the upper space of the bottom bag, forming a bagged sand ridge that protrudes from the top of the bottom bag.

3. The sand barrier according to claim 1, characterized in that: After the openings of the bagged sand embankments and the bottom bag are gathered together, the whole bag is tied and sealed.

4. The sand barrier according to claim 1, characterized in that: After filling with sand, the height d of the sand embankment and the height D of the bottom bag satisfy d / D≤0.50, preferably d / D≤0.34; or, after filling with sand, the width S of the sand embankment and the width L of the bottom bag satisfy S / L≤0.50, preferably S / L≤0.34, more preferably S / L≤0.

25.

5. The sand barrier according to claim 1, characterized in that: The upper bagged sand embankment and the lower bottom bag form a self-stabilizing structure with a convex cross-section.

6. A sand bucket adapted to any one of the sand barriers described in claims 1 to 5, characterized in that: It includes an upper feed hopper and a lower flow section; the flow section is integrally formed or separately assembled with several funnel outlets arranged in parallel; each funnel outlet is fixedly provided with an openable clamp on its outer wall, the clamp is used to clamp and fix the bag mouth, so that the bag mouth and the funnel outlet are connected respectively, so as to realize the simultaneous filling of sand into multiple bags.

7. The sand bucket according to claim 6, characterized in that, The clamp is any one of the following: elastic clamp, plastic buckle, elastic strap, clamp, or magnetic pressure block.

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