Layered geogrid imitating fish scale staggered arrangement

Abstract

The layered geogrid imitating fish scale staggered arrangement comprises fish scale-shaped double-layer grid strips, the fish scale-shaped double-layer grid strips comprise first grid strips and second grid strips, the first grid strips are provided with first tooth-shaped rib structures, the second grid strips are provided with second tooth-shaped rib structures connected with the first tooth-shaped rib structures in an engaged mode, and the first grid strips and the second grid strips are connected in an engaged mode. The ends, connected with the first grille bars, of the second grille bars have elasticity, so that the second grille bars can rotate around the first grille bars under the action of external force. The connecting blocks are used for connecting the adjacent fish scale-shaped double-layer grating strips and forming a net-shaped structure; wherein the adjacent fish-scale-shaped double-layer grating strips are arranged in a positive and negative alternating manner. The meshing structure can form a continuous arched force transmission path under the action of a vertical load, so that local stress is effectively diffused to a peripheral area through the contact surfaces of the tooth-shaped ribs and the semi-open type grid strips, and the shear resistance, the stress diffusion capacity and the overall stability of the structure are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of civil engineering, and in particular to a layered geogrid arranged in a fish scale-like staggered manner. BACKGROUND

[0002] In the technical field of civil engineering, geogrids are a kind of main geosynthetics, which have unique performance and functions compared with other geosynthetics. They are mainly used for the reinforcement of building structure soft foundation, the construction of roads and railways, etc., and their working principle is based on the action of reinforcement. In theory, when the geogrid is subjected to load, it can disperse and transfer stress, control soil settlement and reflection cracking. When the geogrid is subjected to horizontal tension, it can play its lateral limiting role, enhance the overall anti-sliding performance and bearing capacity of the soil. Geogrids have the advantages of convenient construction, low cost, shortening of construction period, strengthening of soil slope, reduction of cushion thickness, increase of road (ground) bearing capacity, reduction of road (ground) surface deformation and crack generation, etc., and therefore have a wide application in the technical field of civil engineering.

[0003] However, the existing geogrids are divided into plastic geogrids, steel-plastic geogrids, glass fiber geogrids and polyester warp-knitted polyester geogrids, which have the problems of poor reinforcement performance, insufficient tensile strength leading to easy cracking, high cost of some products, etc. In addition, the existing geogrids are generally two-dimensional grid-shaped or three-dimensional grid-shaped with a certain height, but the internal structure of the geogrid is not optimized to enhance its overall performance. Moreover, simply using higher performance materials to make geogrids has limited performance improvement. With the gradual improvement of the construction standards in the technical field of civil engineering, traditional geogrids cannot meet the needs of some high-standard civil engineering projects at present. SUMMARY

[0004] Therefore, the present application provides a layered geogrid arranged in a fish scale-like staggered manner, which utilizes the bionic fish scale-like staggered arrangement to make the geogrid have multiple stress directions. This multi-directional stress characteristic enables the geogrid to better adapt to complex environments and improve the bearing capacity of the geogrid.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions: A layered geogrid arranged in a fish scale-like staggered manner, comprising: The fish scale-shaped double-layer grid strip comprises a first grid strip and a second grid strip, the second grid strip comprises two half-open grid strips, the two half-open grid strips are fixed at two ends of the first grid strip in opposite inclined directions, the first grid strip is provided with a first tooth-shaped rib structure, the second grid strip is provided with a second tooth-shaped rib structure which is engagedly connected with the first tooth-shaped rib structure, and the end of the second grid strip connected with the first grid strip is flexible, so that the second grid strip can rotate around the first grid strip under the action of an external force. The connecting block is used for connecting adjacent fish scale-shaped double-layer grid strips and forming a mesh structure. The fish scale-shaped double-layer grid strip is connected by the connecting block in a first state and a second state, respectively, the first grid strip is located at the bottom of the second grid strip when the fish scale-shaped double-layer grid strip is in the first state, the first grid strip is located at the top of the second grid strip when the fish scale-shaped double-layer grid strip is in the second state, and a staggered arrangement in imitation of fish scales is formed.

[0006] Optionally, in the staggered arrangement in imitation of fish scales, the connecting block has a square cross section, and the fish scale-shaped double-layer grid strips are connected to four edges of the square cross section respectively to realize the cross connection of the fish scale-shaped double-layer grid strips in the horizontal direction and the vertical direction.

[0007] Optionally, in the staggered arrangement in imitation of fish scales, the included angle between the second grid strip and the first grid strip is 10°-20°.

[0008] Optionally, in the staggered arrangement in imitation of fish scales, the length of the fish scale-shaped double-layer grid strip is less than or equal to 10 cm.

[0009] Optionally, in the staggered arrangement in imitation of fish scales, the shapes of the first tooth-shaped rib structure and the second tooth-shaped rib structure are all triangular, fish scale-shaped or wave-shaped.

[0010] Optionally, in the staggered arrangement in imitation of fish scales, the fish scale-shaped double-layer grid strip and the connecting block are integrally formed.

[0011] Optionally, in the staggered arrangement in imitation of fish scales, the material of the fish scale-shaped double-layer grid strip is plastic or carbon fiber.

[0012] Optionally, in the staggered arrangement in imitation of fish scales, the material of the fish scale-shaped double-layer grid strip is carbon fiber, and the first grid strip and the second grid strip are both hollow structures.

[0013] Optionally, in the layered geogrid arranged in a fish scale staggered manner, a reinforcing rib is arranged in the interior of the first geogrid strip and the second geogrid strip.

[0014] Optionally, in the layered geogrid arranged in a fish scale staggered manner, the connecting block is a hollow structure.

[0015] The layered geogrid arranged in a fish scale staggered manner provided by the application is configured by using the fish scale staggered arrangement, a plurality of fish scale double-layer geogrid strips and connecting blocks are connected to form a net structure, and adjacent fish scale double-layer geogrid strips are arranged in a first state and a second state. In the first state, the first geogrid strip is located at the bottom of the second geogrid strip, and in the second state, the first geogrid strip is located at the top of the second geogrid strip. It can be understood that the adjacent geogrid strips are arranged in an alternating manner. The first geogrid strip is provided with a first tooth-shaped rib structure, and the second geogrid strip is a half-open geogrid strip. When the overlying soil body exerts pressure or the underlying soil body is uplifted, the first tooth-shaped rib structure on the first geogrid strip and the second tooth-shaped rib structure of the second geogrid strip form a mechanical interlocking. Due to the alternating arrangement of the adjacent fish scale double-layer geogrid strips, the interlocking structure can form a continuous arched force transmission path under the action of vertical load, so that the local stress is effectively diffused to the surrounding area through the contact surface of the tooth-shaped rib and the half-open geogrid strip, thereby significantly improving the shear resistance, stress diffusion capacity and overall stability of the structure. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0017] Figure 1 It is an overall structural schematic diagram provided in the specific embodiment 1 of the present application. Figure 2 It is another perspective structural schematic diagram of the overall structure provided in the specific embodiment 1 of the present application. Figure 3 It is still another perspective structural schematic diagram of the overall structure provided in the specific embodiment 1 of the present application. Figure 4 It is a structural schematic diagram of the connection between the connecting block and the fish scale double-layer geogrid strip provided in the specific embodiment 1 of the present application. Figure 5 It is another perspective structural schematic diagram of the connection between the connecting block and the fish scale double-layer geogrid strip provided in the specific embodiment 1 of the present application. Figure 6A schematic diagram of the overall stress state provided in specific embodiment 1 of the present application; Figure 7 A schematic diagram of another perspective of the overall stress state provided in specific embodiment 1 of the present application; Figure 8 A schematic diagram of the connection block and the fish scale-shaped double-layer grid strip in the stress state provided in specific embodiment 1 of the present application.

[0018] In Figures 1-8 , the present application provides a fish scale-shaped double-layer grid strip. 1, fish scale-shaped double-layer grid strip; 2, connection block; 11, first grid strip; 12, second grid strip; 3, transverse grid belt; 4, longitudinal grid belt; 5, grid unit. DETAILED DESCRIPTION

[0019] The present application provides a fish scale-shaped interlaced arrangement of layered geogrids, which utilizes the bionic fish scale interlaced arrangement to withstand the overlying soil load pressure or the lower layer soil uplift pressure, so as to be widely applicable to the deformation of soil in different situations, i.e., can prevent uneven settlement of soil and can also inhibit soil reflection cracking.

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0021] Bionics can provide various inspirations across disciplines by studying various natural phenomena in the biological world, and there are quite a few application examples in related fields. During swimming, the scales of a fish will form different stress states according to the swing, and each surface can be in a state of compression or bending. The change of such stress state can be applied to geogrids, providing a reference for designing a structure capable of generating similar "two-way stress".

[0022] The design inspiration of the geogrid in the present application comes from the scales of a fish. The scales on the body of a fish are not arranged in a straight line, but are staggered and stacked one after another, forming a flexible and strong protective layer. Based on this, the geogrid of the present application is designed.

[0023] Embodiment 1.

[0024] As Figures 1-8As shown, this application provides a layered geogrid with a fish-scale-like staggered arrangement. The layered geogrid includes: fish-scale-shaped double-layer geogrid bars 1, comprising a first geogrid bar 11 and a second geogrid bar 12. The second geogrid bar 12 includes two semi-open geogrid bars, which are fixed to both ends of the first geogrid bar 11 in opposite inclined directions. The first geogrid bar 11 is provided with a first toothed rib structure, and the second geogrid bar 12 is provided with a second toothed rib structure that engages with the first toothed rib structure. The end of the second geogrid bar 12 connected to the first geogrid bar 11 has… The elasticity allows the second grid strip 12 to rotate around the first grid strip 11 under the action of external force; the connecting block 2 is used to connect adjacent fish-scale double-layer grid strips 1 and form a mesh structure; wherein, adjacent fish-scale double-layer grid strips 1 are connected by the connecting block 2 in a first state and a second state respectively. When the fish-scale double-layer grid strip 1 is in the first state, the first grid strip 11 is located at the bottom of the second grid strip 12; when the fish-scale double-layer grid strip 1 is in the second state, the first grid strip 11 is located at the top of the second grid strip 12, forming a fish-scale-like staggered arrangement. It can be understood that the fish-scale double-layer grid strip 1 in the first state is obtained by rotating the fish-scale double-layer grid strip 1 in the second state by 180°.

[0025] Specifically, when the geogrid is not under load or under a small load, there are tiny gaps between the staggered fish-scale double-layer geogrid strips 1. When the geogrid is subjected to pressure from the upper soil layer, the first geogrid strip 11 in the first state will deflect under pressure, causing the second geogrid strip 12 fixed at both ends to deform in conjunction. In the second state, the two semi-open geogrid strips of the fish-scale double-layer geogrid 1 will rotate downward around the ends of the first geogrid strip 11. In addition, the fish-scale double-layer geogrid strips 1 in the first state and the fish-scale double-layer geogrid strips 1 in the second state are connected by connecting blocks 2 to form a mesh structure. This alternating arrangement of positive and negative geogrids can prevent the fish-scale double-layer geogrid strips 1 from arching in the same direction in a local area and losing the constraint on the soil below the arch when subjected to local pressure.

[0026] The downward pressure of the second geogrid strip 12 causes the first geogrid strip 11 to tighten, and the downward pressure of the first geogrid strip 11 causes the second geogrid strip 12 to rise, forming a stress redistribution and load diffusion effect, effectively suppressing uneven settlement. This allows the geogrid to form a force transmission structure similar to an arch bridge, preventing locally concentrated stress from continuing to be transmitted downwards or upwards. When the lower foundation heaves or uneven reverse force is generated, pressure acts on the bottom of the geogrid from below, pushing the first geogrid strip 11 to bulge upwards. At this time, the second geogrid strip 12 rotates in the opposite direction with the cooperation of its elastic end and engages with the first geogrid strip 11, suppressing soil heave while also preventing breakage caused by rigid constraints.

[0027] Alternatively, when the fish-scale double-layer grid bar 1 protrudes and bends from the first grid bar 11 to the second grid bar 12, since both ends of the fish-scale double-layer grid bar 1 are connected to the connecting block 2, it cannot extend freely, thus generating tension at both ends. This tension is transmitted to the two semi-open grid bars of the second grid bar 12, causing them to be subjected to tension with an opening tendency. At this time, the soil on the protruding side blocks the bending deformation of the fish-scale double-layer grid bar 1, and the first toothed rib structure engages with the second toothed rib structure on the two semi-open grid bars, thereby generating friction to prevent the first toothed rib structure and the second toothed rib structure from misaligning.

[0028] When the fish-scale double-layer grid bar 1 bends from the second grid bar 12 toward the first grid bar 11, the two semi-open grid bars of the second grid bar 12 are subjected to pressure from the soil compression, resulting in pressure generated at both ends of the fish-scale double-layer grid bar 1. The two semi-open grid bars are compressed with the first grid bar 11. The compressive strength of the first grid bar 11 and the second grid bar 12 themselves, together with the frictional force, prevent the first toothed rib structure and the second toothed rib structure from being misaligned, thus utilizing the properties of the toothed rib structure itself.

[0029] In summary, the interlocking of the first and second toothed rib structures disperses and transmits vertical forces to the surrounding soil, helping to counteract local soil deformation and prevent stress concentration-induced damage. This prevents uneven soil settlement and inhibits reflective cracking. In some cases, when the soil laterally slides, the first toothed rib structure of the first grid bar 11 and the second toothed rib structure of the second grid bar 12, in addition to their interlocking, also have frictional and interlocking forces with the surrounding soil, increasing the shear strength of the geogrid and preventing soil displacement.

[0030] Furthermore, the connecting block 2 has a square cross-section, and fish-scale double-layer grid strips 1 are connected to the four sides of the square cross-section to achieve horizontal and vertical cross-connection of the fish-scale double-layer grid strips 1. It can be understood that the connecting block 2 is a cube, and fish-scale double-layer grid strips 1 are connected to the four side walls of the cube. Multiple fish-scale double-layer grid strips 1 are connected horizontally and vertically through the connecting block 2 to form a mesh structure including multiple quadrilaterals. Each mesh structure is considered a grid unit 5. In addition, adjacent fish-scale double-layer grid strips 1 on the connecting block 2 are alternately distributed in opposite directions, so that the sum of the resultant torque (relative to the geometric center of the grid unit 5) generated by the forces acting on the four connecting blocks 2 in each grid unit 5 is zero, ensuring that the grid unit 5 is force-balanced and has no rotational tendency, thereby enhancing the connection between the grid units 5 of the geogrid and the stability during use. Meanwhile, the toothed rib structure of the fish-scale double-layer geogrid strip 1 reduces material loss compared to existing plastic geogrids, steel-plastic geogrids, glass fiber geogrids, and polyester warp-knitted geogrids, and also improves its torsional and bending strength.

[0031] It should be noted that under the arching effect caused by local soil loads on one or more fish-scale double-layer grid strips 1, the stress in all directions is transmitted through the connecting blocks 2, so that adjacent grid units 5 and within a certain range all exhibit a strong stress state, cooperating with each other to coordinate the soil deformation stress of the entire area. The opposite sides of the fish-scale double-layer grid strips 1 in each grid unit 5 are arranged upside down by 180°, and the adjacent fish-scale double-layer grid strips 1 between each connecting block 2 are arranged alternately in the forward and reverse directions in the transverse or longitudinal directions, thereby avoiding the unidirectional effect of the arching effect within a certain range.

[0032] Multiple fish-scale-shaped double-layer grid strips 1 connected laterally by connecting block 2 form a transverse grid strip 3; multiple fish-scale-shaped double-layer grid strips 1 connected longitudinally by connecting block 2 form a longitudinal grid strip 4.

[0033] In addition, the angle between the second grid strip 12 and the first grid strip 11 is 10°-20°. If the angle between the second grid strip 12 and the first grid strip 11 is too small, it cannot provide sufficient interlocking depth, the self-locking effect of the fish-scale double-layer grid strip 1 will be weakened, the pull-out resistance will not be significantly improved, that is, the interlocking effect will be poor, and its interlocking structure will be prone to misalignment, which may lead to connection failure or a decrease in the overall stability of the structure in severe cases. If the angle between the second grid strip 12 and the first grid strip 11 is too large, the interlocking depth will be increased, causing the material to lose the flexibility of stress release and become too rigid. This can easily lead to excessive stress or material cracking in areas of concentrated stress, reducing the reliability and durability of the structure.

[0034] Preferably, the length of the fish-scale double-layer grid strip 1 is less than or equal to 10 cm. If the length of the fish-scale double-layer grid strip 1 is too short, it means that the interlocking area of ​​the first grid strip 11 and the second grid strip 12 within each grid unit 5 is reduced, the load transmission path is shortened, resulting in uneven force distribution and localized stress concentration. If the fish-scale double-layer grid strip 1 is too long, it is difficult to achieve uniform force transmission under load, and the load often concentrates at the connection root of the first grid strip 11 and the second grid strip 12, causing excessively high localized stress, which can easily lead to crack initiation or fatigue fracture under long-term use. Therefore, the length of the fish-scale double-layer grid strip 1 should be neither too short nor too long. This design can improve the load transmission capacity of the fish-scale double-layer grid strip 1 and extend its service life.

[0035] In an optional embodiment, both the first and second toothed rib structures are continuously arranged triangles or fish scales. The staggered arrangement of triangles mimicking fish scales makes the engagement of the first and second toothed rib structures more robust.

[0036] Meanwhile, the arrangement of any of the above shapes increases the contact area of ​​the first grid strip 11 and the second grid strip 12, which is more conducive to the transmission of force. In addition, when the fish scale double-layer grid strip 1 is arched, the first toothed rib structure and the second toothed rib structure are firmly locked together to prevent the strength loss caused by the mutual slippage between the components.

[0037] In an optional embodiment, the fish-scale-shaped double-layer geogrid strips 1 and the connecting block 2 are integrally formed. This design saves installation time, improves the overall performance of the geogrid, and prevents problems with poor coupling between components.

[0038] In an optional embodiment, the fish-scale double-layer grid strip 1 is made of either plastic or carbon fiber. Choosing the material of the fish-scale double-layer grid strip 1 from these two materials according to actual needs increases the flexibility of material selection.

[0039] In an optional embodiment, the connecting block 2 is a hollow structure. With this configuration, after the geogrid is installed, the soil will enter the hollow structure and replace the raw materials to achieve the same effect, reducing material consumption and lowering costs.

[0040] Example 2.

[0041] The difference between Embodiment 2 and Embodiment 1 is that the fish-scale double-layer grid strip 1 is made of carbon fiber, and both the first grid strip 11 and the second grid strip 12 are hollow structures. Without affecting its structural strength, the fish-scale double-layer grid strip 1 is hollowed out, retaining only a certain thickness, such as the outline of a triangle or other toothed cross-section, thereby reducing material consumption and lowering costs. This allows for improved overall structural strength and load-bearing capacity while further reducing weight, and avoids excessive material usage leading to high costs.

[0042] Reinforcing ribs are provided inside the first grid bar 11 and the second grid bar 12. This improves the load-bearing strength of the geogrid.

[0043] Example 3.

[0044] The difference between Embodiment 3 and Embodiment 1 is that the first and second toothed rib structures of the fish-scale double-layer geogrid strip 1 are both continuously wavy. This reduces the probability of sand and other particles in the soil getting stuck between the continuous triangular toothed structures, allowing the first and second toothed rib structures to better interlock and improve friction. Furthermore, the wavy surface results in a more uniform stress distribution when the geogrid is under stress, preventing stress concentration at sharp points that could lead to material fatigue or damage.

[0045] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0046] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0047] It should also be noted that in the apparatus, equipment, and housing of this application, the components or steps can be disassembled and / or reassembled. These disassemblies and / or reassemblies should be considered as equivalent solutions of this application.

[0048] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0049] It should be understood that the qualifiers “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0050] The above description has been given for illustrative and descriptive purposes. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A layered geogrid with an alternating fish-scale pattern, characterized in that, include: The fish-scale double-layer grid bar includes a first grid bar and a second grid bar. The second grid bar includes two semi-open grid bars, which are fixed to the two ends of the first grid bar in opposite inclination directions. The first grid bar is provided with a first toothed rib structure, and the second grid bar is provided with a second toothed rib structure that engages with the first toothed rib structure. The end of the second grid bar connected to the first grid bar is elastic, so that the second grid bar can rotate around the first grid bar under the action of external force. Connecting blocks are used to connect adjacent fish-scale-shaped double-layer grid strips and form a mesh structure; The adjacent fish-scale double-layer grid strips are connected by the connecting block in a first state and a second state, respectively. When the fish-scale double-layer grid strip is in the first state, the first grid strip is located at the bottom of the second grid strip. When the fish-scale double-layer grid strip is in the second state, the first grid strip is located at the top of the second grid strip, forming an imitation fish-scale staggered arrangement.

2. The layered geogrid with an imitation fish scale interlaced arrangement according to claim 1, characterized in that, The connecting block has a square cross-section, and the fish-scale double-layer grid strips are connected to the four sides of the square cross-section to achieve the cross-connection of the fish-scale double-layer grid strips in the horizontal and vertical directions.

3. The layered geogrid with an imitation fish scale interlaced arrangement according to claim 1, characterized in that, The angle between the second grid bar and the first grid bar is 10°-20°.

4. The layered geogrid with an imitation fish scale interlaced arrangement according to claim 1, characterized in that, The length of the fish-scale double-layer grid strip is less than or equal to 10cm.

5. The layered geogrid with an imitation fish scale interlaced arrangement according to claim 1, characterized in that, The first toothed rib structure and the second toothed rib structure are both continuously arranged triangles, fish scales, or waves.

6. The layered geogrid with an imitation fish scale interlaced arrangement according to claim 1, characterized in that, The fish-scale-shaped double-layer grid strips and the connecting block are integrally formed.

7. The layered geogrid with an imitation fish scale interlaced arrangement according to claim 1, characterized in that, The fish-scale-shaped double-layer grid strips are made of plastic or carbon fiber.

8. The layered geogrid with an imitation fish scale interlaced arrangement according to claim 1, characterized in that, The fish-scale-shaped double-layer grid strips are made of carbon fiber, and both the first and second grid strips are hollow structures.

9. The layered geogrid with an imitation fish scale interlaced arrangement according to claim 8, characterized in that, Reinforcing ribs are provided inside both the first and second grid bars.

10. The layered geogrid with an imitation fish scale interlaced arrangement according to claim 1, characterized in that, The connecting block has a hollow structure.

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