Integrally stretched geogrid
By designing the integrated tensile geogrid of round drum nodes and ribs, the balance of pore rate and strength of geogrid under low temperature conditions is solved, and an overall tensile geogrid with high pore rate and high strength is achieved. It is suitable for geogrids with excellent foundation reinforcement and locking performance.
Patent Information
- Application Number
- CN202422408068.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-30
AI Technical Summary
Existing geogrids are difficult to balance the pore rate and strength, resulting in reduced performance and poor locking performance under low temperature conditions.
An integral tensile geogrid is designed, using round drum nodes and rib strips extending in different directions. The dimension ratio of nodes to rib strips is greater than 2.0, and the aperture ratio is greater than 60%. It is manufactured through precision punching and vertical and horizontal integrated tensile production processes to ensure tensile strength ≥10kN/m.
It achieves high strength and good locking performance at high opening rate, improves foundation reinforcement effect and pull-resistance performance, and is suitable for permanent foundation reinforcement under low temperature conditions.
Smart Images
Figure CN223163852U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of geogrids, and particularly relates to an integrally stretched geogrid. Background Art
[0002] A geogrid is a polymer material widely used in civil engineering, mainly used for soil reinforcement and engineering construction such as roads and bridges. In recent years, with the continuous development of technology and the increasing market demand, the grid, as a new material, has been more and more widely used due to its convenient construction, low cost and excellent performance.
[0003] The materials used to make geogrids include polypropylene and polyethylene. Among them, polypropylene geogrids have high strength and rigidity and can withstand high loads, but polypropylene geogrids have poor low-temperature performance. The geogrids are prone to becoming brittle at lower temperatures, and their performance is far inferior to that of polyethylene geogrids under application conditions with lower temperatures; compared with polypropylene geogrids, polyethylene biaxial geogrids have better ductility and flexibility and excellent creep resistance. Especially at low temperatures, the performance of the geogrids far exceeds that of polypropylene geogrids, and the freeze-thaw cycle strength retention rate is high.
[0004] Whether it is a polypropylene geogrid or a polyethylene geogrid, in order to improve the interlocking performance of the geogrid with the soil, it is necessary to ensure that the geogrid has a high opening ratio. However, a high opening ratio will lead to a decrease in the strength of the geogrid. Therefore, how to balance the opening ratio and strength of the geogrid has always been the focus of research in the industry. Summary of the Utility Model
[0005] Details of one or more embodiments of the present utility model are set forth in the following drawings and description to make other features, objects and advantages of the present application more concise and understandable.
[0006] The present utility model provides an integrally stretched geogrid, which solves the technical problem that the existing geogrids cannot balance the opening ratio and strength, and has the characteristics of high opening ratio and ensuring the strength of the geogrid.
[0007] The present utility model discloses an integrally stretched geogrid, which comprises a plurality of drum-shaped nodes, and ribs extending from each of the nodes along at least 4 different directions; at least 3 adjacent nodes and the ribs connecting between the nodes define a grid, and a plurality of the grids are arranged repeatedly to define the integrally stretched geogrid; the ratio of the height of the node to the thickness of the rib is greater than 2.0, and the width of the node is 2-4 times the width of the rib; the opening ratio of the integrally stretched geogrid is greater than 60%.
[0008] In some of the embodiments, the length ratio of each rib extending from each of the nodes along at least 4 different directions is 1.0±0.2.
[0009] In some embodiments, the grid is a square or an equilateral triangle.
[0010] In some embodiments, each rib extending from each node in at least 4 different directions has the same shape and size.
[0011] In some embodiments, the length of the rib is selected from any value in the range of 20 - 60 mm.
[0012] In some embodiments, the thickness of the rib is greater than 2 mm.
[0013] In some embodiments, the width of the rib is less than 3 mm.
[0014] In some embodiments, the material of the integral stitched geogrid is polyethylene.
[0015] In some embodiments, the grid is a square.
[0016] In some embodiments, the node and the rib corresponding to the node are of an integral structure.
[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0018] The present utility model provides an integral stitched geogrid. By defining the shape of the node and the dimensional relationship between the node and the rib, an opening rate of the integral stitched geogrid greater than 60% is achieved. At the same time, the tensile strength of the integral stitched geogrid is ensured to be ≥ 10 kN / m. While ensuring the opening rate, the product has excellent strength performance, good performance of interlocking fillers, excellent pull-out performance, and good long-term strength, thereby effectively restricting the movement of soil particles and having excellent foundation reinforcement effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:
[0020] Figure 1 is a schematic structural view of the integral stitched geogrid provided by the embodiment of the present utility model;
[0021] Figure 2 is another angle structural view of the integral stitched geogrid provided by the embodiment of the present utility model;
[0022] In the above figures: 1, node; 2, rib; 3, grid. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0023] In order to make the purpose, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be described and explained below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments provided by the present utility model without making creative efforts belong to the scope of protection of the present utility model.
[0024] An embodiment of the present utility model provides an integrally stretched geogrid. Figure 1 、 2 FIG. is a schematic structural diagram of the integrally stretched geogrid according to an embodiment of the present utility model. Refer to Figure 1 、 2 As shown, the integrally stretched geogrid includes a plurality of drum-shaped nodes 1, and rib strips 2 extending from each node 1 along at least 4 different directions; at least 3 adjacent nodes 1 and the rib strips 2 correspondingly connected between the nodes 1 define a grid 3, and a plurality of grids 3 are arranged repeatedly to define the integrally stretched geogrid; the ratio of the height of the node 1 to the thickness of the rib strip 2 is greater than 2.0, and the width of the node 1 is 2-4 times the width of the rib strip 2; the opening ratio of the integrally stretched geogrid is greater than 60%.
[0025] By defining the shape of the node 1 and the dimensional relationship between the node 1 and the rib, the above integrally stretched geogrid achieves an opening ratio of more than 60% for the integrally stretched geogrid. At the same time, the tensile strength of the integrally stretched geogrid is guaranteed to be ≥10 kN / m. While ensuring the opening ratio, the product has excellent strength performance, good performance of locking the filler, excellent pull-out performance, and good long-term strength, so as to effectively restrict the movement of soil particles and have excellent foundation reinforcement effect. Specifically, the node 1 of the integrally stretched geogrid is drum-shaped and extends into rib strips 2 in different directions. The node 1 and the rib strips 2 are a complete integral structure formed by integral stretching, with a high degree of orientation and high strength efficiency of the node 1. At the lap joint of two groups or multiple rib strips 2, they are combined in a non-woven, injection molding or welding form. The drum-shaped node 1 is more likely to be embedded in the soil, and together with the grid 3, it forms a locking mechanism for the filler. The ratio of the height of the node 1 to the thickness of the rib strip 2 > 2.0, the width of the node 1 is 2-3 times the width of the rib strip 2, the node 1 is stretched sufficiently and has a small area. The special dimensional structure of the rib strip 2 and the node 1 makes the opening ratio of the product mesh > 60%. While ensuring the opening ratio, the product has excellent strength performance, good performance of locking the filler, excellent pull-out performance, the tensile strength of the product is ≥10 kN / m, and it has good long-term strength, so as to effectively restrict the movement of soil particles and have excellent foundation reinforcement effect.
[0026] In some of these embodiments, the length ratio of each rib 2 extending from each node 1 in at least 4 different directions is 1.0 ± 0.2. Further, the tensile strength ratio of each rib 2 extending from each node 1 in at least 4 different directions is 1.0 ± 0.2.
[0027] In some of these embodiments, the grid 3 is square or equilateral triangle. Further, the shape dimensions of each rib 2 extending from each node 1 in at least 4 different directions are the same; the length of the rib 2 is selected from any value in the range of 20 - 60 mm; the thickness of the rib 2 is greater than 2 mm; the width of the rib 2 is less than 3 mm. It can be understood that the length of the rib 2 can also be 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm and any point value within its range. The width of the rib 2 can also be 2.5 mm, 2.0 mm, 1.5 mm, 1.0 mm, 0.5 mm and any point value within its range. In some of these embodiments, the grid 3 is square.
[0028] The mesh holes of existing polyethylene grids are all oval long holes or rectangular holes, mainly applied to retaining structures such as retaining walls and anti - slide piles. The high tensile strength is mainly in the longitudinal direction, and the strength in the transverse or other directions is very low. For foundation bearing, the effect of enhancing the roadbed is poor. The overall opening rate of the product is low. In some large - particle - size or special soil environments, the interlocking performance is poor and the anti - pull - out performance is poor. The mesh holes formed by the ribs 2 and nodes 1 of the integral - stretching geogrid provided by the present utility model are approximately square or triangular. The nodes 1 are drum - shaped, with a high degree of orientation, high strength efficiency of the nodes 1, equal strength in each direction along the ribs 2, the ribs 2 are more slender but with a large thickness, the nodes 1 are fully stretched and have a small area. The special size structure of the ribs 2 and nodes 1 enables the opening rate of the product mesh holes > 60%, ensuring the opening rate while the product has excellent strength performance, good interlocking filler performance, excellent pull - out performance, the tensile strength of the product ≥ 10 kN / m, with good long - term strength, thus effectively restricting the movement of soil particles and having excellent foundation reinforcement effect.
[0029] In some of these embodiments, the material of the integral - stretching geogrid is polyethylene material. Existing polyethylene grids are all unidirectional grids, with excellent longitudinal strength but low transverse strength, mainly applied to retaining structures, and cannot provide an ideal mechanical interlocking system for foundation bearing, resulting in poor foundation reinforcement effect. The present utility model uses high - density polyethylene as the raw material, adopts the production process of extruding plates, precision punching and longitudinal and transverse integral stretching to produce a polyethylene bidirectional grid, which has high overall strength, small creep deflection, can be applied to the permanent foundation enhancement under low - temperature conditions, has high anti - low - temperature impact resistance and freeze - thaw cycle strength retention rate, large opening rate, better reinforcement effect, can be applied to large - particle - size or special soil environments, has excellent interlocking performance and excellent anti - pull - out performance, and can effectively improve the foundation bearing capacity.
[0030] In some of these embodiments, the node 1 and the rib corresponding to the node 1 are of an integral structure. Specifically, the present utility model uses high-density polyethylene as the raw material, adopts the production process of extruding plates, precision punching, and overall longitudinal and transverse stretching to produce a polyethylene biaxial grid, in which the node 1 and the rib 2 are an integral structure formed by overall stretching. Two or more ribs 2 are combined at the lap joint in a non-woven, injection-molded or welded form.
[0031] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.
[0032] The above-described embodiments only represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.
Claims
1. An integral stretched geogrid, characterized in that, It includes several drum-shaped nodes and ribs extending from each of the nodes in at least 4 different directions; at least 3 adjacent nodes and the ribs connecting between the nodes define a grid, and several of the grids are arranged repeatedly to define the overall stretched geogrid; The ratio of the height of the node to the thickness of the rib is greater than 2.0, and the width of the node is 2-4 times the width of the rib; the opening ratio of the overall stretched geogrid is greater than 60%.
2. The integral stretching geogrid according to claim 1, wherein The length ratio of each rib extending from each of the nodes in at least 4 different directions is 1.0±0.
2.
3. The integral stretching geogrid according to claim 2, wherein, The grid is a square or an equilateral triangle.
4. The integral stretching geogrid according to claim 3, wherein, The shape and size of each rib extending from each of the nodes in at least 4 different directions are the same.
5. The integral stretching geogrid according to claim 4, wherein The length of the rib is selected from any value in the range of 20-60mm.
6. The integral tensile geogrid according to claim 4, wherein The thickness of the rib is greater than 2mm.
7. The integral stretching geogrid according to claim 4, wherein The width of the rib is less than 3mm.
8. The integral stretching geogrid according to claim 1, characterized in that The material of the overall stretched geogrid is polyethylene.
9. The integral stretching geogrid according to claim 3, wherein The grid is a square.
10. The integral drawing geogrid according to claim 1, wherein, The node and the rib corresponding to the node are of an integral structure.