Sand barrier type permeable geocell
By introducing permeable and ventilated structures and plug-in designs into geocells, the problems of wind and sand prevention and drainage in existing geocells have been solved, thereby improving the stability and service life of slopes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA RAILWAY ENG CONSULTING GRP CO LTD
- Filing Date
- 2025-04-18
- Publication Date
- 2026-04-17
AI Technical Summary
While existing geocells can prevent soil erosion and slope instability, they are not effective in preventing wind and sand, and they cannot drain water in time during rain, which affects the stability and lifespan of the slope.
A sand barrier type permeable geocell was designed, including a sand fixation layer and a sand barrier layer. The sand fixation layer is buried below the ground surface and has water seepage holes, while the sand barrier layer is located above the ground surface and has ventilation holes. The ventilation holes are denser near the ground surface and gradually decrease in density, while the water seepage holes have a lower density further away from the ground surface. Connectors are used to fix the structure at the connection nodes.
It effectively prevents wind erosion, increases surface roughness, reduces sand blowing, enhances slope stability, extends cell life, and rapidly filters water under immersion conditions, preventing fine-particle filler from being washed away.
Smart Images
Figure CN224133700U_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of slope protection technology, and in particular to a sand barrier type permeable geocell. Background Technology
[0002] Geocells have been widely used in geotechnical fields such as roadbed construction and slope greening. In recent years, geocells have been increasingly used for slope protection to prevent soil erosion and slope instability. For example, a large number of geocells have been laid in the roadbeds and slopes of some desert highways, effectively preventing local instability in roadbeds filled with silty sand. However, existing geocells only reinforce slopes and cannot achieve the effect of windbreak and sand control on the slope surface. As a result, a large amount of sand is blown away by surface winds on silty sand slopes, resulting in poor sand control. In addition, when there is rain, water cannot drain out of the existing geocells in time, causing the geocells to be soaked in water for a long time. This is not only detrimental to the stability of the protected slope, but also reduces the lifespan of the geocells due to long-term soaking. Utility Model Content
[0003] The purpose of this invention is to provide a sand barrier type permeable geocell to improve the above-mentioned problems. To achieve this purpose, the technical solution adopted by this invention is as follows:
[0004] A sand barrier type permeable geocell includes:
[0005] A sand-fixing layer, which is buried below the ground surface, has water seepage holes.
[0006] A sand barrier layer, located above the ground surface, with ventilation holes provided on the sand barrier layer.
[0007] Optionally, the height of the sand-fixing layer is 50-100 mm.
[0008] Optionally, the height of the sand barrier layer is 30-50mm.
[0009] Optionally, the sand barrier type permeable geocell is disposed on the slope surface. The sand barrier type permeable geocell includes a connector, which is disposed at the connection node of the sand barrier type permeable geocell and inserted into the ground to restrict the movement of the sand barrier type permeable geocell in the downhill direction.
[0010] Optionally, the connector is a U-shaped connector, which includes two pins, which are respectively inserted on both sides of the connection node.
[0011] Optionally, the U-shaped connector further includes a positioning strip, which is disposed between the two connector pins and located on the side of the connection node closer to the downhill direction.
[0012] Optionally, the diameter of the seepage hole is 1mm-6mm.
[0013] Optionally, the diameter of the ventilation hole is 8mm-15mm.
[0014] Optionally, the number of ventilation holes on the sand barrier layer gradually decreases along the direction from the ground surface to above the ground surface.
[0015] Optionally, the surface of the sand barrier layer is coated with an anti-aging coating.
[0016] The beneficial effects of this utility model are as follows:
[0017] This utility model provides a mesh-like sand barrier type permeable geocell, comprising a sand barrier layer and a sand-fixing layer. The sand barrier layer is exposed above the ground and has ventilation holes. These ventilation holes effectively increase surface roughness and reduce wind force, not only effectively preventing surface wind erosion and significantly reducing wind erosion, thus playing a role in windbreak and sand fixation, but also extending the service life of the geocell. The sand-fixing layer is buried underground and has seepage holes, which can quickly filter water under immersion conditions. The multi-layered linear micropores prevent the fine-particle filler from being washed away in desert areas, thus playing a role in water filtration and sand fixation.
[0018] Other features and advantages of this invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing embodiments of this invention. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the sand barrier type permeable geocell structure in the embodiments of this application;
[0021] Figure 2 This is a schematic diagram of the U-shaped connector structure in the embodiments of this application;
[0022] Figure 3 This is a schematic diagram of the anti-aging coating in an embodiment of this application.
[0023] Symbol explanation: 1. Sand barrier type permeable geocell; 2. U-shaped connector; 2.1. Positioning strip; 3. Sand fixation layer; 3.1. Water seepage hole; 4. Sand barrier layer; 4.1. Ventilation hole; 4.2. Anti-aging coating. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
[0025] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this utility model, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0026] Windbreak and sand fixation are inseparable from desertification control projects, which form the applied foundation of aeolian geomorphology research. These projects aim to prevent desertification and protect farmland, pastures, transportation routes, and settlements from sandstorms.
[0027] Currently, commonly used methods for desertification control include straw checkerboard sand barriers, stone checkerboard sand barriers, and high-standing sand barriers. Straw checkerboard sand barriers, as the name suggests, are engineering measures using straw (which can be rice straw, wheat straw, or reeds) tied into a checkerboard shape, typically one meter square, partially buried in the sand. They first appeared in Shapotou, Ningxia, to protect the Baotou-Lanzhou railway line passing through the Tengger Desert. Their disadvantages include high manpower and straw usage, high sand-fixing costs, long construction time, and limited lifespan, generally requiring replacement after 3-5 years. Their advantages include increasing surface roughness, reducing wind force, trapping condensation caused by large daily temperature differences, allowing water to infiltrate and increasing soil moisture content, and increasing soil organic matter content as the straw decomposes, thus improving the survival rate of sand-fixing plants. Before planting sand-fixing plants, the surface of areas with straw checkerboards forms a crust, making it less prone to sandstorms, thus playing a significant role in protecting transportation lines.
[0028] Stone checkerboard sand barriers: As the name suggests, these are checkerboard sand barriers made of stones. The disadvantage is that they are not as effective at controlling desertification as straw checkerboard sand barriers. However, they also have significant advantages: firstly, they can increase surface roughness and reduce wind force; secondly, they are easier to use locally available materials, as the quantity of straw, rice straw, and reeds in the desert is limited, but stones are plentiful in some areas; and thirdly, they have a long service life, and due to their weight, they are not easily blown away or damaged by the wind, making them more suitable for desert sand control in the Gobi Desert.
[0029] Tall, upright sand barriers, as the name suggests, are sand barriers erected high up. They can be made from various materials, such as netting, cloth, or plastic woven bags and snakeskin bags. Their advantages include a certain height and continuous protection, resulting in good sand-blocking effect and a large protection area, making them suitable for areas with high sand transport volumes. They are generally used on the outermost layer of planar protection. The disadvantages are that if a part of the sand barrier is damaged, the entire defense line will quickly fail. Furthermore, tall, upright sand barriers are generally only used for planar protection and cannot be used for wind and sand protection of roadbed structures.
[0030] In desert highways, numerous geocells are laid on the roadbed and slopes for slope protection. Existing geocells are generally buried below the soil surface, with each small cell filled with soil or gravel, and can also be planted with vegetation to enhance the bearing capacity and stability of the foundation, preventing localized instability. This patent combines the functions of existing geocells with sand barriers, reducing the height of the sand barrier protection and using geosynthetic materials to design a sand barrier-type permeable geocell. This geocell serves two purposes: firstly, it reinforces the slope; secondly, the prominent sand barrier portion on the slope surface helps to block and stabilize sand, significantly improving the sand control effect of the roadbed slope.
[0031] like Figure 1 As shown, the sand barrier type permeable geocell 1 of this utility model (hereinafter referred to as geocell 1) includes:
[0032] Sand fixation layer 3 is buried below the ground surface, and seepage holes 3.1 are provided on the sand fixation layer 3 for filtering water and preventing erosion.
[0033] Sand barrier layer 4, which is located above the ground surface, has ventilation holes 4.1.
[0034] Geocell 1 is made of long strips of material connected by ultrasonic welding or other methods. When unfolded, it forms a honeycomb-like three-dimensional grid, including multiple small cells. The small cells can be square, rectangular, circular, elliptical, or other shapes. Each small cell can be filled with sand, gravel, soil, or other materials.
[0035] The sand-fixing layer 3, which filters water and prevents erosion, mainly serves to stabilize the roadbed and slopes, and improve the foundation strength of the paved area; the upper sand barrier layer 4 mainly serves to block sand, increase surface roughness, and reduce wind force, thereby effectively reducing sand and dust, and achieving the purpose of sand fixation and sand control.
[0036] As an optional implementation, the height of the sand barrier layer 4 is 30-50mm. The current tall vertical sand barriers are relatively high, while the general geocell 1 is completely buried under the slope. Therefore, based on the design requirements of the geocell 1 itself, the height of the upper sand barrier layer 4 of the geocell 1 in this application is shorter than that of the tall vertical sand barrier. However, due to its very dense distribution, it can achieve the same sand control effect as the ordinary tall vertical sand barrier, and it is not easily damaged and has a longer service life.
[0037] As an optional implementation, the height of the sand-fixing layer 3 is 50-150 mm.
[0038] The welded joints of the aforementioned sheets are the connection nodes of geocell 1, which are the intersections of the four small cells, and the connection nodes are X-shaped. Since geocell 1 is laid on the slope, before filling each small cell with soil, it is necessary to limit geocell 1 to prevent it from sliding down the slope; therefore, a plug-in connector is required. The plug-in connector is inserted into the slope, preferably located below the X-shaped connection node (downhill direction), thereby restricting the geocell 1 from sliding downhill.
[0039] In addition, to prevent the geocell 1 from moving left and right during installation, the connector can be designed as a U-shaped connector 2. The U-shaped connector 2 includes two connector legs, which are respectively inserted on the left and right sides of the X-shaped connection node. At this time, the bend of the U-shaped connector 2 is above the connection node, thus simultaneously limiting the upward movement of the geocell 1.
[0040] In a preferred embodiment, the U-shaped connector 2 further includes a positioning strip 2.1, which is disposed between the two connector pins and located on the side of the connection node closer to the downslope direction. When the U-shaped connector 2 is inserted, the two connector pins are controlled to be on the left and right sides of the X-shaped connection node, and the positioning strip 2.1 is locked below the X-shaped connection node, further enhancing the limiting effect on the connection node in all directions.
[0041] See Figure 2In the geocell 1, the sand-fixing layer 3 is provided with permeable holes 3.1. The permeable holes 3.1 can be evenly distributed on the sheet. Specifically, the permeable holes 3.1 are arrayed micro-holes with a diameter of, for example, 1mm-6mm, more preferably 2mm-4mm. Within this range, rainwater can be ensured to seep out quickly from the permeable holes 3.1, while preventing soil, silt or gravel in the geocell 1 from flowing out from the permeable holes 3.1.
[0042] Ventilation holes 4.1 are provided on the sand barrier layer 4 of geocell 1. The ventilation holes 4.1 have a higher distribution density on the side close to the sand fixation layer 3, while the distribution density gradually decreases on the side away from the sand fixation layer 3. In other words, there are more ventilation holes 4.1 closer to the ground surface, and the number of ventilation holes 4.1 gradually decreases as it moves away from the ground surface. This makes the ventilation rate of the sand barrier layer 4 gradually decrease from the ground surface upwards, for example, from about 30% to about 10%. As sand carried by the wind moves upwards, the sand content gradually decreases from the surface, while the wind speed gradually increases. Therefore, the ventilation holes 4.1 of this invention are more densely packed closer to the surface. This effectively controls the amount of sand passing through, ensuring that the sand is evenly blocked in each cell, preventing it from accumulating at the edges of the geocell 1. Conversely, the number of ventilation holes 4.1 gradually decreases further away from the surface, reducing the wind throughput, increasing the roughness of the ground, and gradually weakening the intensity of the sandstorm. This improves the overall sand-blocking and sand-fixing capacity of the entire geocell 1, allowing the entire geocell 1 layout area to store more sand, thereby increasing the overall service life of the geocell 1 and preventing a large amount of sand from being blown onto the road surface.
[0043] The diameter of the ventilation hole 4.1 is larger than that of the water infiltration hole 3.1. For example, the diameter of the ventilation hole 4.1 can be 8mm-15mm, and more preferably 10mm-12mm. If the diameter is too small, the wind will not easily blow through, reducing the ventilation rate and failing to disperse and protect against wind and sand, leading to the failure of the entire protection system. If the diameter is too large, it will reduce the sand fixation effect and fail to effectively trap sand in the geocell 1, thus reducing wind and sand. In this embodiment, the sand barrier layer 4 gradually transitions from about 30% to 10% of the mesh ventilation rate of the ventilation holes 4.1 from the ground surface upwards, increasing the surface roughness and reducing wind force. This not only effectively prevents slope wind erosion and plays a role in windbreak and sand fixation, but also improves the overall service life of the geocell 1. The sand-fixing layer 3, which filters water and prevents erosion, is provided with multiple layers of linear micropores for rapid water filtration under immersion conditions. The multiple layers of linear micropores can prevent the fine-grained filler in desert areas from being eroded, thus playing a role in water filtration and sand fixation.
[0044] As an optional implementation method, see [link / reference]. Figure 3 The surface of the sand barrier layer 4 is coated with an anti-aging coating 4.2. The anti-aging coating 4.2 has the functions of anti-ultraviolet and anti-oxidation, which can effectively slow down the aging of the sand barrier layer 4 and improve its service life.
[0045] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A sand fence type water permeable earthwork cell, characterized by, include: Sand fixation layer (3), which is buried below the ground surface, and has seepage holes (3.1) on it; A sand barrier layer (4) is located on the ground surface, and ventilation holes (4.1) are provided on the sand barrier layer (4).
2. The sand-fence type water-permeable earthwork cell according to claim 1, characterized by The height of the sand-fixing layer (3) is 50-150 mm.
3. The sand-fence type water-permeable earthwork cell according to claim 1, characterized by The height of the sand barrier layer (4) is 30-50mm.
4. The sand-fence type water-permeable earthwork cell according to claim 1, characterized by The sand barrier type permeable geocell (1) is set on the slope. The sand barrier type permeable geocell (1) includes a connector. The connector is set at the connection node of the sand barrier type permeable geocell (1) and inserted into the ground to restrict the movement of the sand barrier type permeable geocell (1) downhill.
5. The sand-fence type water-permeable earthwork cell according to claim 4, characterized by The connector is a U-shaped connector (2), which includes two pins, which are respectively inserted on both sides of the connection node.
6. The sand barrier type permeable geocell according to claim 5, characterized in that, The U-shaped connector also includes a positioning clip (2.1), which is disposed between the two connector pins and is located on the side of the connection node closer to the downhill direction.
7. The sand-fence type water-permeable earth mat according to claim 1, wherein The diameter of the seepage hole (3.1) is 1mm-6mm.
8. The sand-fence type water-permeable earth mat according to claim 1, wherein The diameter of the ventilation hole (4.1) is 8mm-15mm.
9. The sand-fence type water-permeable earth mat according to claim 1, wherein Along the direction from the ground surface to above the ground surface, the distribution of ventilation holes (4.1) on the sand barrier layer (4) gradually decreases.
10. The sand-fence type water-permeable earth mat according to claim 1, wherein The surface of the sand barrier layer (4) is coated with an anti-aging coating.