Geogrid with X-shaped section structure
By designing an X-shaped cross-section geogrid, the contact area and friction between the reinforcement and the soil are increased. Combined with the anchoring effect of the four legs, the problems of insufficient pull-out resistance and unstable connection of existing geogrids are solved, achieving a higher reinforcement effect and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA MERCHANTS EXPRESSWAY NETWORK TECH HLDS CO LTD
- Filing Date
- 2026-02-27
- Publication Date
- 2026-05-12
AI Technical Summary
The friction between the reinforcing bars and the soil in existing geogrids is not fully utilized, resulting in insufficient pull-out resistance, and the fixing effect of traditional connection methods is not good.
The design of X-shaped cross-section geogrids increases the contact area and friction between the reinforcement and the soil by setting wing plates, grooves and node slots on the main body of the geogrid and connecting them with four legs. This improves the friction between the reinforcement and the soil, enhances the soil compaction by using the trapezoidal shape of the grooves, and improves the connection stability by combining the anchoring effect of the four legs.
It enhances the friction and pull-out resistance between the reinforcement and the soil, improves the reinforcement effect of the grid, enhances the stability and bending resistance of the grid to the soil, and makes the connection more stable.
Smart Images
Figure CN122013744A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of geogrid technology, specifically relating to an X-shaped cross-section geogrid. Background Technology
[0002] Geogrids are two-dimensional or three-dimensional mesh grids with a certain height, made of high-molecular polymer materials such as polypropylene and polyethylene through thermoforming and molding. Geogrids are widely used in the reinforcement of roadbeds, embankments, retaining walls, slopes, and soft soil foundations. Through the friction and lateral restraint between the reinforced body and the soil, they improve the integrity and safety of the reinforced structure. Currently, the main geogrid-reinforced structures include reinforced soil retaining walls, reinforced slopes, reinforced soil roadbeds, reinforced soil abutments, and reinforced soil cushion layers. By layering and compacting the fill soil and placing geogrids, the overall structural integrity and shear strength of the fill soil are improved. Currently, the main types of geogrids include uniaxial geogrids, biaxial geogrids, triaxial geogrids, warp-knitted geogrids, and steel-plastic geogrids.
[0003] Currently, the main types of geogrids used are longitudinally thickened unidirectional geogrids and bidirectional geogrids with equal width in both the longitudinal and transverse directions. Other geogrid materials, such as steel-plastic geogrids and warp-knitted geogrids, also employ bidirectional geogrids with equal width in both the longitudinal and transverse directions. This fully utilizes the longitudinal and transverse tensile strength of the materials, while the longitudinal and transverse reinforcements constrain and anchor the soil within the grid, further enhancing soil reinforcement. In addition, new geogrid types such as triaxial and multiaxial geogrids have emerged. These geogrids primarily increase the tensile strength of the geogrid in different directions on the plane by adding reinforcements in different directions. However, regardless of whether it is a unidirectional, bidirectional, or multiaxial geogrid, the main reinforcement and anchoring is achieved by arranging reinforcements on the geogrid plane. The interaction between the geogrid and the soil, through the interfacial friction between the reinforcement and the soil, enhances pull-out resistance. The geogrid's reinforcement of the soil is mainly achieved through interfacial friction between the reinforcement and the soil, and the constraint and anchoring of the soil by the longitudinal and transverse reinforcements. However, the current geogrid cross-section is mainly a regular rectangular strip. The pull-out resistance of the reinforcement is mainly achieved through the friction between the upper and lower surfaces of the geogrid and the soil. The degree of friction at the reinforcement-soil interface is far lower than the tensile strength of the reinforcement, and the potential of the reinforcement is not fully utilized. Summary of the Invention
[0004] To address the shortcomings of existing technologies, this invention provides an X-shaped cross-section geogrid.
[0005] This invention is achieved through the following technical solution: An X-shaped cross-section geogrid includes a geogrid body, which includes longitudinal bars and transverse bars, and the longitudinal bars and transverse bars intersect to form a square grid structure. The cross-section of the main body of the grid is provided with wing plates, which are symmetrically arranged at the four corners of the cross-section of the main body of the grid to form an X-shaped cross-section structure, so that the upper and lower surfaces of the main body of the grid form a first groove along the length direction, and the left and right sides of the main body of the grid form a second groove along the length direction; node grooves are provided at the nodes of the main body of the grid.
[0006] In the above technical solution, the node groove is viewed from above as a square groove, and the cross-section of the node groove is a trapezoidal groove.
[0007] In the above technical solution, the deflection angle of the wing plate relative to the horizontal axis of the grid section is 30°.
[0008] In the above technical solution, the first groove is a trapezoidal groove. When in use, the grid body is laid horizontally and buried in the soil. The first groove is filled with soil from the upper and lower parts of the grid, so that the soil is compacted in the first groove, and the soil compaction degree is improved. At the same time, the trapezoidal shape of the first groove provides constraint on the soil in the groove, further improving the friction between the reinforcement and the soil.
[0009] In the above technical solution, the second groove is a trapezoidal groove. When in use, the main body of the grid is laid horizontally and buried in the soil. The second groove is filled with soil on the left and right sides of the grid, so that the soil is squeezed and compacted in the second groove. The increased density of the soil in the second groove increases the friction between the soil and the grid. At the same time, the second groove forms a lateral constraint on the soil in the grid formed by the longitudinal and transverse bars, further improving the reinforcement effect of the grid on the soil.
[0010] In the above technical solution, when multiple grid bodies are connected, they are fixed at the node slots of adjacent grid bodies by four legs; the four legs include anchor blocks and four legs, the anchor blocks are square blocks, the legs are inverted L-shaped, and the four legs are respectively connected to the four corners of the anchor blocks; the anchor blocks are embedded in the node slots of the grid bodies, and the four inverted L-shaped legs are stuck at the corners of the grid body nodes, and the legs are inserted into the soil around the grid body nodes (in the use state, the grid bodies are laid horizontally and buried in the soil).
[0011] The advantages and beneficial effects of this invention are as follows: 1. The X-shaped cross-section geogrid of the present invention, by setting wing plates, first buries the geogrid body in the soil to compact the soil. In use, the wing plates set at the four corners of the geogrid cross-section can increase the contact area between the geogrid body and the soil, improve the friction between the reinforcement and the soil, increase the pull-out resistance of the geogrid, and improve the reinforcement effect of the geogrid on the soil. Furthermore, since the wing plates increase the maximum size of the geogrid cross-section, the bending and torsional resistance of the geogrid is increased under the condition of soil compaction, improving the stability of the reinforced soil slope and further improving the reinforcement effect of the geogrid on the soil.
[0012] 2. The X-shaped cross-section geogrid of the present invention, by setting a first groove and a second groove, after the geogrid is arranged and the backfill is compacted, due to the trapezoidal shape of the first and second grooves, the soil in the first groove on the upper and lower surfaces is further compacted under vertical pressure. At the same time, the trapezoidal first groove increases the constraint force on the soil in the first groove, improves the compaction degree of the soil in the first groove, further improves the friction between the upper and lower surfaces of the geogrid and the soil and the pull-out force of the geogrid. Moreover, due to the trapezoidal shape of the second grooves on the left and right sides of the geogrid, the soil is squeezed into the second groove, improving the compaction degree of the soil in the second groove, further improving the lateral friction between the geogrid and the soil, and improving the horizontal constraint effect of the geogrid on the soil in the grid, thus improving the reinforcement and strengthening effect of the geogrid.
[0013] 3. The X-shaped cross-section geogrid of the present invention, by setting node grooves and four-legged supports, when connecting two adjacent geogrid sections, stacks the ends of the two geogrid sections together at a certain length, and then sets four-legged supports at the node grooves. The square anchor blocks of the four-legged supports are embedded in the node grooves, which can fix the four-legged supports on the geogrid. Furthermore, the four inverted L-shaped legs of the four-legged supports penetrate the soil at the node, further fixing the relative position of the upper and lower stacked geogrids and making the upper and lower geogrids better fixed to the soil. Compared with the traditional method of fixing geogrids with U-shaped nails, the node grooves and four-legged supports have better fixing effect and anchoring force. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention.
[0015] Figure 2 This is a schematic diagram of the connection method and connection device of the two grid sections in this invention.
[0016] Figure 3 This is a schematic diagram of the connection point node slot in this invention.
[0017] Figure 4 This is a schematic diagram of the longitudinal groove and the second groove of the grid cross-section in this invention.
[0018] Figure 5 This is a schematic diagram of the structural composition of the four-legged support legs in this invention.
[0019] In the figure: 1-1, main body of the grid; 1-2, longitudinal rib; 1-3, transverse rib; 1-4, wing plate; 2-1, four-legged support; 3-1, node groove; 4-1, first groove; 4-2, second groove; 5-1, anchor block; 5-2, support leg.
[0020] For those skilled in the art, other related figures can be obtained from the above figures without any creative effort. Detailed Implementation
[0021] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below with reference to specific embodiments.
[0022] See Figure 1 and attached Figure 2 An X-shaped cross-section geogrid includes a geogrid body 1-1, which includes longitudinal bars 1-2 and transverse bars 1-3. The longitudinal bars 1-2 and transverse bars 1-3 intersect to form a square grid structure.
[0023] See appendix Figure 3 and attached Figure 4 The cross section of the grid body 1-1 is provided with wing plates 1-4. The wing plates 1-4 are symmetrically arranged at the four corner points of the cross section of the grid body 1-1 to form an X-shaped cross section structure, so that the upper and lower surfaces of the grid body 1-1 form a first groove 4-1 along the length direction, and the left and right sides of the grid body 1-1 form a second groove 4-2 along the length direction; a node groove 3-1 is provided at the node of the grid body 1-1. The node groove 3-1 is a square groove when viewed from above.
[0024] See appendix Figure 2 and attached Figure 5 When multiple grille bodies 1-1 are connected, they are fixed at the node slots 3-1 of adjacent grille bodies 1-1 by four-legged supports 2-1. See Appendix Figure 5 The four-legged support 2-1 includes an anchor block 5-1 and four legs 5-2. The anchor block 5-1 is a square block, and the legs 5-2 are inverted L-shaped. The four legs 5-2 are respectively connected to the four corners of the anchor block 5-1. The anchor block 5-1 is embedded in the node groove 3-1 of the grid body 1-1, which can improve the fixing effect of the grid body 1-1. The four inverted L-shaped legs 5-2 are stuck at the corners of the nodes of the grid body 1-1, and the legs 5-2 are inserted into the soil around the nodes of the grid body 1-1 (in the use state, the grid body 1-1 is laid horizontally and buried in the soil), which can effectively improve the anchoring effect of the stacked grid bodies 1-1 and strengthen the connection effect between different grid bodies.
[0025] Furthermore, the wing plate 1-4 is deflected at an angle of 30° relative to the horizontal axis of the geogrid cross-section. By setting the wing plate 1-4, the contact area between the geogrid and the soil in both the vertical and horizontal directions is increased, thereby increasing the total surface area of the geogrid and improving the friction between the reinforcement and the soil. However, the amount of material used in the geogrid is not significantly increased, which improves the pull-out resistance and overall technical and economic efficiency of the geogrid.
[0026] Furthermore, the first groove 4-1 is a trapezoidal groove. During use, the grid body 1-1 is laid horizontally and buried in the soil. The first groove 4-1 is filled with soil from the upper and lower parts of the grid, which compacts the soil in the first groove and increases the soil compaction. At the same time, the trapezoidal shape of the first groove 4-1 provides constraint on the soil in the groove, further improving the friction between the reinforcement and the soil.
[0027] Furthermore, the second groove 4-2 is a trapezoidal groove. During use, the main body of the grid 1-1 is laid horizontally and buried in the soil. The second groove 4-2 is filled with soil from the left and right sides of the grid, which compacts the soil in the second groove. The increased density of the soil in the second groove increases the friction between the soil and the grid. At the same time, the second groove 4-2 provides lateral restraint to the soil in the grid formed by the longitudinal reinforcement 1-2 and the transverse reinforcement 1-3, further improving the reinforcement effect of the grid on the soil.
[0028] Furthermore, the cross-sectional shape of the node groove 3-1 of the grid body 1-1 is a trapezoidal groove. When the grid body is buried in the soil, the trapezoidal groove of the node groove 3-1 can constrain the soil in the groove and increase the compaction of the soil in the groove.
[0029] Furthermore, during use, when connecting two adjacent geogrids 1-1, a certain length of geogrid at the edge needs to be stacked together, and the stacked node slots 3-1 overlap. Four-legged supports 2-1 are used to fix the overlapping geogrid body. Anchor blocks 5-1 are embedded in node slots 3-1. Four inverted L-shaped supports extend into the soil next to the nodes, fixing the geogrid nodes and anchoring the geogrids. The fixing effect of the four-legged supports 2-1 includes the embedding effect of anchor blocks 5-1 and node slots 3-1, as well as the fixing effect of inverted L-shaped supports 5-2 on the geogrid nodes and the anchoring effect after extending into the soil. Compared with traditional U-shaped supports, the fixing and anchoring effect of geogrid connection sections is better.
[0030] Working principle: In use, the main body of the grid 1-1 is first laid horizontally in the soil, and soil is filled and compacted on the top of the grid. The total surface area of the grid is increased by the wing plate 1-4, which can improve the contact area between the grid and the soil and the friction between the reinforcement and the soil. Furthermore, the wing plate 1-4 forms a first groove 4-1 and a second groove 4-2 symmetrically arranged on the upper and lower surfaces and left and right sides of the grid. The trapezoidal shape of the first groove 4-1 further compacts the soil in the first groove, and at the same time, the sidewall of the first groove increases the constraint effect on the soil in the first groove, improving the friction between the reinforcement and the soil. The trapezoidal groove of the second groove 4-2 increases the compaction of the soil entering the second groove 4-2, improves the friction between the left and right lateral surfaces of the reinforcement and the soil, and at the same time provides lateral constraint on the soil in the grid formed by the longitudinal reinforcement 1-2 and the transverse reinforcement 1-3.
[0031] After the main body of the grid 1-1 is laid, the edges of two adjacent grid bodies are stacked together for a certain length and fixed to the node groove 3-1 by four-legged support legs 2-1. The square anchor block 5-1 is embedded in the node groove 3-1 of the grid body connection section to play an anchoring role. The four inverted L-shaped support legs 5-2 extend into the soil next to the grid node. The four-legged support legs 2-1 fix the stacked grid at the node through the four legs. At the same time, the support legs extending into the soil play an anchoring role for the connected grid, further improving the fixing effect of the stacked grid node. In addition, the node groove 3-1 of the non-connecting section is trapezoidal in shape, which can improve the compaction of the soil entering the node groove and play a lateral restraint role for the soil in the groove, further improving the reinforcement and anchoring effect of the grid on the soil.
[0032] The present invention has been described above by way of example. It should be noted that any simple modifications, alterations or other equivalent substitutions that can be made by those skilled in the art without creative effort without departing from the core of the present invention fall within the protection scope of the present invention.
Claims
1. A geogrid with an X-shaped cross-section, characterized in that: The grid includes a main body, which consists of longitudinal and transverse ribs that intersect to form a square grid structure. The cross-section of the main body of the grid is provided with wing plates, which are symmetrically arranged at the four corners of the cross-section of the main body of the grid to form an X-shaped cross-section structure, so that the upper and lower surfaces of the main body of the grid form a first groove along the length direction, and the left and right sides of the main body of the grid form a second groove along the length direction; node grooves are provided at the nodes of the main body of the grid.
2. The X-shaped cross-section geogrid according to claim 1, characterized in that: The node groove is viewed from above as a square groove, and its cross-section is a trapezoidal groove.
3. The X-shaped cross-section geogrid according to claim 1, characterized in that: The wing plate is deflected at an angle of 30° relative to the horizontal axis of the grid section.
4. The X-shaped cross-section geogrid according to claim 1, characterized in that: The first groove is a trapezoidal groove. During use, the main body of the grid is laid horizontally and buried in the soil. The first groove is filled with soil from the upper and lower parts of the grid, which compacts the soil in the first groove and increases the soil compaction. At the same time, the trapezoidal shape of the first groove provides constraint on the soil in the groove.
5. The X-shaped cross-section geogrid according to claim 1, characterized in that: The second groove is a trapezoidal groove. During use, the main body of the grid is laid horizontally and buried in the soil. The second groove is filled with soil from the left and right sides of the grid, which compacts the soil in the second groove. The increased density of the soil in the second groove increases the friction between the soil and the grid. At the same time, the second groove provides lateral constraint to the soil in the grid formed by the longitudinal and transverse bars.
6. The X-shaped cross-section geogrid according to claim 1, characterized in that: When multiple grid bodies are connected, they are fixed at the node slots of adjacent grid bodies by four legs. The four legs include an anchor block and four legs. The anchor block is a square block and the legs are inverted L-shaped. The four legs are connected to the four corners of the anchor block. The anchor block is embedded in the node slot of the grid body, and the four inverted L-shaped legs are stuck at the corners of the grid body node and inserted into the soil around the grid body node.