Prestressed assembled geocell and using method

Abstract

The application discloses a prestressed assembly type earthwork grid and a use method, belongs to the technical field of geotechnical engineering, and comprises a grid net, a prestressed grid reinforcing body which is correspondingly arranged with the grid net and is fixed to the upside of the grid net and is used for improving vertical anti-settling force, and a plurality of anchoring members which are uniformly and interval arranged on the prestressed grid reinforcing body, and the anchoring members are sequentially penetrated through the prestressed grid reinforcing body and the grid net from top to bottom and are fixed in the soil body. The prestressed grid reinforcing body is assembled on the earthwork grid net, the transverse constraint capability is ensured, and the vertical anti-settling capability is improved through the reinforcing ribs of the prestressed grid reinforcing body.

Description

Technical Field

[0001] This invention belongs to the field of geotechnical engineering technology, specifically relating to a prestressed prefabricated geogrid and its usage method. Background Technology

[0002] As two typical reinforcing materials, geogrids and geocells are widely used in geotechnical engineering.

[0003] Geogrids are a type of intersecting grid structure. Due to the interlocking action between the surface and soil particles, they can provide a lateral constraint on the soil particles, thereby achieving the effect of soil reinforcement. However, as a planar structure, geogrids have very little constraint on vertical loads during the roadbed reinforcement process, which can easily cause large settlement deformation.

[0004] Geocells are often stretched into a honeycomb shape during use, hence they are also called honeycomb confinement systems. As a three-dimensional reinforced structure, geocells have a certain bending resistance due to their overall reinforcement. At the same time, the internal structure of the cell can apply confining pressure to the soil, thereby reducing soil settlement and deformation and improving soil bearing capacity. As a three-dimensional reinforced structure, geocells have a better reinforcement effect than geogrids, but their mechanism of action and failure modes are more complex, and their cost is also higher than that of geogrids.

[0005] With the further development of technology, some scholars have proposed a three-dimensional reinforcement form for geogrids. This involves attaching structures such as rubber sheets and iron plates to the ribs of the geogrid in a planar reinforcement manner. While strengthening the ribs of the geogrid, the structure also provides a passive lateral resistance effect due to its height, in addition to the conventional interlocking effect with the soil. However, most of the previous three-dimensional reinforcement structures were achieved by pasting and binding, which is a relatively complex construction process. Small-area pasting reinforcement is insufficient to resist soil settlement during highway traffic. Summary of the Invention

[0006] To solve the above problems, the present invention adopts the following technical solution:

[0007] A prestressed prefabricated geogrid, comprising:

[0008] Grille;

[0009] A prestressed grid reinforcement is provided corresponding to the grid and fixed to the upper side of the grid to improve the vertical anti-settlement force.

[0010] Multiple anchors are evenly spaced on the prestressed grid reinforcement, and the anchors pass through the prestressed grid reinforcement and the grid mesh from top to bottom, and are fixed in the soil.

[0011] Furthermore, the prestressed grid reinforcement is a multi-cell plug-in prestressed reinforcement and / or a single-cell tenon-and-mortise reinforcement, and both are fixed to the upper side of the grid mesh by anchors.

[0012] Furthermore, both the multi-cell plug-in prestressed reinforcement and the single-cell tenon-and-mortise reinforcement are provided with carbon fiber composite strands at their lower ends, and the carbon fiber composite strands are fixed to both ends of the reinforcement through strand fixing ends.

[0013] Furthermore, both the multi-cell plug-in prestressed reinforcement and the single-cell tenon-and-mortise reinforcement are provided with drainage holes at their lower ends, and the drainage holes are provided one-to-one with the ribs of the grid mesh.

[0014] Furthermore, the grid mesh is provided with multiple reserved holes.

[0015] Furthermore, the multi-cell plug-in prestressed reinforcement includes: a plurality of prestressed grid longitudinal ribs and a plurality of prestressed grid transverse ribs that are plugged in, wherein the plurality of prestressed grid longitudinal ribs are arranged at intervals along a first direction of the grid; and the plurality of prestressed grid transverse ribs are arranged at intervals along a second direction of the grid.

[0016] The prestressed lattice transverse ribs are provided with multiple grooves, the size of which is matched with the width of the prestressed lattice longitudinal ribs, and the connection between the prestressed lattice longitudinal ribs and the prestressed lattice transverse ribs is fixed by anchors.

[0017] Furthermore, the anchoring components, from top to bottom, include:

[0018] An anchoring claw striker, wherein the anchoring claw striker is slidably disposed on the transverse rib of the prestressed grid, and the first end of the anchoring claw striker is located on the upper side of the transverse rib of the prestressed grid, and the second end penetrates the transverse rib of the prestressed grid and extends into the groove;

[0019] The prestressed grid transverse rib buckle is set in the groove and sleeved on the outside of the second end of the anchor claw striker;

[0020] The longitudinal ribs of the prestressed grid are provided with prestressed grid longitudinal rib slots, which are engaged with the transverse ribs of the prestressed grid.

[0021] The first grid fixing end is fixed to the end of the prestressed grid longitudinal rib away from the prestressed grid transverse rib buckle, and is sleeved on the outside of the anchor claw striker. The first grid fixing end is provided with an anchor claw assembly thread, and the first grid fixing end is configured to cooperate with the reserved hole.

[0022] An anchoring claw is detachably connected to the lower end of the first grid fixing end, and an assembly nut is correspondingly provided inside the anchoring claw.

[0023] Furthermore, the anchoring claw includes:

[0024] The anchoring claw body is conical and hollow. The mounting nut is located at the center of the hollow structure, and the second end of the anchoring claw striker abuts against the bottom end of the mounting nut. Multiple weak points are provided at intervals on the outer surface of the anchoring claw body.

[0025] A mixture of pebbles and gunpowder, wherein the mixture of pebbles and gunpowder is disposed within the hollow structure and evenly wraps around the outside of the mounting nut.

[0026] An anchoring claw trigger pad is disposed between the second end of the anchoring claw striker and the mixture of small stones and gunpowder.

[0027] Furthermore, the single-cell zongzi corner tenon type reinforcement includes: a tenon-jointed prestressed horizontal square piece connected by mortise and tenon and tenon-jointed prestressed vertical insertion valves at the four corners, and a second grid mesh fixing end is provided at the bottom end of the tenon-jointed prestressed vertical insertion valve, and the second grid mesh fixing end is configured to cooperate with the reserved hole.

[0028] The four corners of the prestressed horizontal square piece and the prestressed vertical plug valve are provided with long tenons, short tenons and through tenons that cooperate with each other.

[0029] The second grid mesh has a tapered fixed end.

[0030] A method for using a prestressed prefabricated geogrid, employing any of the prestressed prefabricated geogrids described above, the method comprising the following steps:

[0031] S10. Fabricate the grid mesh with pre-drilled holes. The grid mesh has multiple pre-drilled holes.

[0032] S20, prestressed lattice longitudinal ribs, prestressed lattice transverse ribs, tenon-jointed prestressed horizontal square material, and tenon-jointed prestressed vertical plug valve are all manufactured by 3D printing, and the length of each section is the length of 3-7 grid mesh holes.

[0033] S21. During the printing process, the longitudinal ribs of the prestressed lattice, the transverse ribs of the prestressed lattice, the tenon-jointed prestressed horizontal square material, and the tenon-jointed prestressed vertical plug valve are all printed from the upper surface of the lattice, and the long side of the lower surface of the lattice is made to be greater than the long side of the upper surface during the printing process.

[0034] After the S30 prestressed lattice longitudinal ribs, prestressed lattice transverse ribs, tenon prestressed horizontal square material, and tenon prestressed vertical plug valve are printed and cooled, the carbon fiber composite stranded wire is anchored to the stranded wire fixed end using a riveting machine, and prestress is applied to it so that the projected area of ​​its upper and lower surfaces is equal.

[0035] S40. Complete the assembly of the prestressed lattice reinforcement and the single-cell tenon-and-mortise reinforcement;

[0036] S50. While unrolling the grid mesh, fix both the multi-cell plug-in prestressed reinforcement and the single-cell tenon-and-mortise reinforcement to the grid mesh, fix the anchor claws to the multi-cell plug-in prestressed reinforcement, and extend them through the grid mesh into the soil cover.

[0037] S60. Insert the anchoring claw striker into the predetermined position;

[0038] S70. Place the backfill soil into the geogrid;

[0039] S80. Striking the striker causes the weak part of the anchor claw body to break open and penetrate into the soil.

[0040] S90, cover with soil and compact.

[0041] Beneficial effects:

[0042] 1. The prestressed prefabricated geogrid provided by the present invention combines the advantages of two reinforcing materials. By assembling prestressed geogrid reinforcements into the geogrid, the vertical anti-settlement capacity is improved by the reinforcing ribs of the prestressed geogrid reinforcements while ensuring its lateral restraint capacity.

[0043] 2. The prestressed prefabricated geogrid provided by the present invention further increases the range of the soil it controls by assembling anchor claws, thereby improving its reinforcement effect on the soil.

[0044] 3. The prestressed prefabricated geogrid provided by this invention is assembled on-site. During transportation, the geogrid is transported in rolls. The geogrid reinforcement is easy to stack and place due to its regular external shape. During construction, neither the multi-cell plug-in prestressed reinforcement nor the single-cell tenon-and-mortise reinforcement requires additional bolts, nuts, etc., making construction convenient and the construction site clean.

[0045] 4. The prestressed prefabricated geogrid provided by this invention, in actual operation, the upper load acts on the arched structure of the geogrid, and the force is transmitted to the carbon fiber composite strands and the anchoring nodes of the geogrid through the geogrid structure. On the one hand, after the repeated loads such as vehicle loads disappear, the carbon fiber composite strands can guide the geogrid to recover. On the other hand, the upper load causes the lower part of the geogrid to relax, which can apply greater external pressure to the connection of the transverse ribs and longitudinal ribs of the geogrid, thereby enhancing the stability of the assembled structure.

[0046] 5. The prestressed prefabricated geogrid provided by the present invention can ensure that the water inside the geogrid can be smoothly discharged along the bottom grid ribs through the drainage holes provided inside.

[0047] 6. The prestressed prefabricated geogrid provided by the present invention, through the combined action of prestressed reinforcement, geogrid mesh and anchoring claws, improves its vertical anti-settlement capacity while ensuring the lateral restraint capacity of conventional geogrid, and at the same time reduces construction difficulty and improves construction efficiency through assembly. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention;

[0049] Figure 2 This is a schematic diagram of the bottom assembly configuration of one embodiment of the present invention;

[0050] Figure 3 Schematic diagram of a multi-cell plug-in prestressed reinforcement structure;

[0051] Figure 4 Schematic diagram of the transverse ribs of the plug-in prestressed lattice;

[0052] Figure 5 Schematic diagram of the longitudinal ribs of the plug-in prestressed lattice;

[0053] Figure 6 A schematic diagram of a single-cell zongzi-style prestressed reinforced structure with tenon joints;

[0054] Figure 7 Schematic diagram of a prestressed square block structure with tenon joint;

[0055] Figure 8 This is a schematic diagram of a prestressed vertical plug valve with tenon joint;

[0056] Figure 9 A schematic diagram of a pre-drilled perforated grid structure;

[0057] Figure 10 Diagram showing the mechanism of explosive detonation triggered by the internal explosives of the anchor claw;

[0058] Figure 11 This is a schematic diagram of the internal structure of the anchor claw.

[0059] Among them, 1. prestressed grid longitudinal ribs; 2. prestressed grid transverse ribs; 3. grid mesh; 4. anchor claws; 5. anchor claw strikers; 6. drainage holes; 7. carbon fiber composite stranded wire; 8. stranded wire fixing end; 9. prestressed grid transverse rib buckles; 10. prestressed grid longitudinal rib slots; 11. first grid mesh fixing end; 12. anchor claw assembly threads; 13. tenon-jointed prestressed horizontal square material; 14. tenon-jointed prestressed vertical plug valve; 151. first long tenon; 152. second long tenon; 161. first short tenon; 162. second short tenon; 171. first through tenon groove; 172. second through tenon groove; 173. third through tenon groove; 174. fourth through tenon groove; 18. second grid mesh fixing end; 19. assembly nut; 20. anchor claw trigger washer; 21. mixture of small stones and gunpowder. Detailed Implementation

[0060] Example 1

[0061] refer to Figures 1-11 ,

[0062] A prestressed prefabricated geogrid, comprising:

[0063] 3. Grille mesh;

[0064] The prestressed grid reinforcement is provided corresponding to the grid 3 and fixed to the upper side of the grid 3 to improve the vertical anti-settlement force.

[0065] Multiple anchors are evenly spaced on the prestressed lattice reinforcement, and the anchors pass through the prestressed lattice reinforcement and the grid mesh 3 from top to bottom, and are fixed in the soil.

[0066] In this embodiment, the prestressed grid reinforcement is a multi-cell plug-in prestressed reinforcement and / or a single-cell tenon-and-mortise reinforcement, and both are fixed to the upper side of the grid 3 by anchors.

[0067] Specifically, multi-cell plug-in prestressed reinforcement is suitable for multi-cell continuous reinforcement.

[0068] In this embodiment, the multi-cell plug-in prestressed reinforcement includes: multiple prestressed grid longitudinal ribs 1 and multiple prestressed grid transverse ribs 2 that are plugged in; the multiple prestressed grid longitudinal ribs 1 are arranged at intervals along the first direction of the grid 3; and the multiple prestressed grid transverse ribs 2 are arranged at intervals along the second direction of the grid 3.

[0069] Multiple grooves are provided on the transverse ribs 2 of the prestressed lattice. The size of the grooves is matched with the width of the longitudinal ribs 1 of the prestressed lattice. The connection between the longitudinal ribs 1 and the transverse ribs 2 of the prestressed lattice is fixed by anchors.

[0070] In this embodiment, the anchors, from top to bottom, include:

[0071] Anchoring claw striker 5 is slidably disposed on the prestressed grid transverse rib 2, with the first end of the anchoring claw striker 5 located on the upper side of the prestressed grid transverse rib 2 and the second end penetrating through the prestressed grid transverse rib 2 and extending into the groove.

[0072] The prestressed lattice transverse rib buckle 9 is set in the groove and sleeved on the outside of the second end of the anchor claw striker 5.

[0073] The longitudinal rib 1 of the prestressed grid is provided with a prestressed grid longitudinal rib slot 10, which is configured to cooperate with the prestressed grid transverse rib buckle 9.

[0074] The first grid fixing end 11 is fixed to the end of the prestressed grid longitudinal rib 1 away from the prestressed grid transverse rib buckle 9, and is sleeved on the outside of the anchor claw striker 5. The first grid fixing end 11 is provided with external thread 12.

[0075] Anchor claw 4 is detachably connected to the lower end of the first grid fixing end 11, and an assembly nut 19 is correspondingly provided inside the anchor claw 4.

[0076] Specifically, the multi-cell plug-in prestressed reinforcement is assembled with the grid mesh 3 through the grid mesh fixing end 11 and the reserved holes.

[0077] In this embodiment, the anchoring claw 4 includes:

[0078] The anchoring claw body is conical and hollow. The mounting nut 19 is located at the center of the hollow structure, and the second end of the anchoring claw striker 5 abuts against the bottom end of the mounting nut 19. Multiple weak points are provided at intervals on the outer surface of the anchoring claw body.

[0079] The mixture 21 of pebbles and gunpowder is disposed within a hollow structure and evenly covers the outside of the assembly nut 19.

[0080] Anchor claw trigger pad 20 is disposed between the second end of the anchor claw striker 5 and the mixture of small stones and gunpowder 21.

[0081] Specifically, after the anchoring claw 4 is assembled, the anchoring claw striker 5 is triggered by external pressure. The anchoring claw striker 5 strikes the anchoring claw trigger pad 20, thereby causing the internal small stones to shift. The friction and shifting of the internal small stones generates heat, which in turn detonates the explosive inside the anchoring claw 4, causing the anchoring claw 4 to explode along the predetermined weak part, thereby achieving the purpose of enhancing the anchoring effect between the grid and the underlying soil.

[0082] Specifically, the anchoring claw 4 is pre-designed with blasting patterns during the production process, which facilitates the anchoring claw to blast open in a directional and uniform manner, thereby enhancing the anchoring effect between the grid and the underlying soil.

[0083] In this embodiment, the single-cell zongzi corner tenon reinforcement includes: a tenon prestressed horizontal square piece 13 connected by tenon and mortise and tenon and tenon prestressed vertical insertion valve 14 at the four corners, and a second grid mesh fixing end 18 is provided at the bottom end of the tenon prestressed vertical insertion valve 14.

[0084] Specifically, the single-cell tenon-and-mortise type reinforcement is assembled with the pre-reserved holes of the grid mesh 3 through the grid mesh fixing end 18.

[0085] The four corners of the prestressed horizontal square piece 13 and the prestressed vertical plug valve 14 are provided with mutually matching long tenons 15, short tenons 16 and through tenons 17.

[0086] The second grid fixed end 18 is tapered.

[0087] Specifically, the tenon-jointed prestressed horizontal square piece 13 is composed of four prestressed reinforcing ribs of the same size and tenon-jointed prestressed vertical plug valves 14 at the four corners.

[0088] The tenon-jointed prestressed vertical plug valve 14 replaces the vertical square material of the mortise and tenon structure on the one hand, and is used for the connection and fixation between the reinforcing body and the grid mesh 3 on the other hand.

[0089] In this embodiment, the grid mesh 3 is provided with a plurality of reserved holes, which are configured to cooperate with the first grid mesh fixing end 11 and / or the second grid mesh fixing end 18.

[0090] In this embodiment, carbon fiber composite strands 7 are provided at the lower ends of the prestressed grid longitudinal ribs 1, the prestressed grid transverse ribs 2, and the tenoned prestressed transverse square material 13, and the carbon fiber composite strands 7 are fixed to both ends of the reinforcing body through strand fixing ends 8.

[0091] Specifically, the carbon fiber composite stranded wire 7 can be replaced by steel stranded wire with an outer PVC sheath.

[0092] Specifically, during the production process, the lower surface long side of the prestressed lattice longitudinal rib 1, the prestressed lattice transverse rib 2, and the tenon-jointed prestressed transverse square piece 13 is slightly longer than the upper surface long side. Later, after prestressing is applied using carbon fiber composite strand 7, the projected areas of the upper and lower surfaces of the reinforcing ribs are equal after prestressing. This facilitates the assembly process during construction and provides stronger joint connections during operation.

[0093] In this embodiment, drainage holes 6 are provided at the lower ends of the prestressed grid longitudinal ribs 1, the prestressed grid transverse ribs 2, and the tenoned prestressed horizontal square material 13. The drainage holes 6 are provided in a one-to-one correspondence with the ribs of the grid mesh 3.

[0094] Preferably, the drainage hole is an arc-shaped groove, which facilitates the drainage of moisture inside the reinforcement.

[0095] Specifically, the multi-cell plug-in prestressed reinforcement adopts a plug-in method with the prestressed grid longitudinal rib 1 on top and the prestressed grid transverse rib 23 on the bottom, with the two ribs intersecting vertically; the single-cell tenon-and-mortise reinforcement is formed by vertically plugging four tenon-jointed prestressed horizontal square pieces 13 together, then gently hammering them with a rubber mallet to fix them, and then fixing them to the four tenon-jointed prestressed vertical plug-in valves 14.

[0096] Example 2

[0097] This embodiment provides a method for using a prestressed prefabricated geogrid, employing the prestressed prefabricated geogrid provided in Embodiment 1. The method includes the following steps:

[0098] S10. Fabricate the grid mesh 3, which has multiple pre-reserved holes;

[0099] S20, prestressed lattice longitudinal rib 1, prestressed lattice transverse rib 2, tenon-jointed prestressed horizontal square material 13, and tenon-jointed prestressed vertical plug valve 14 are all made by 3D printing, and the length of each section is the length of 3-7 grid mesh 3 holes of the grid mesh 3.

[0100] Specifically, the manufacturing process of geogrid 3 is the same as that of traditional geogrids, which involves extrusion, cooling, punching, stretching and winding to ensure its strength.

[0101] Preferably, the mesh size is 30mm-70mm, and the board material used in the extrusion process has reserved holes to facilitate subsequent assembly.

[0102] Preferably, the printing material is a blend of polylactic acid and natural rubber. The dimensions of the grid ribs are 50mm-100mm high and 20mm-50mm wide, with each section being 150mm-350mm long. This means that each section of the grid reinforcement controls the length of 3-7 grid holes in the pre-reserved grid mesh.

[0103] S21, prestressed lattice longitudinal rib 1, prestressed lattice transverse rib 2, tenon-jointed prestressed horizontal square material 13, tenon-jointed prestressed vertical plug valve 14 During the printing process, printing starts from the upper surface of the lattice, and the long side of the lower surface of the lattice is made larger than the long side of the upper surface during the printing process.

[0104] S30, prestressed lattice longitudinal rib 1, prestressed lattice transverse rib 2, tenon prestressed transverse square material 13, tenon prestressed vertical plug valve 14 After printing and cooling, use a riveting machine to anchor the carbon fiber composite strand 7 to the strand fixed end 8, apply prestress to it, and make its upper and lower surface projected areas equal.

[0105] S40. Complete the assembly of the prestressed lattice reinforcement and the single-cell tenon-and-mortise reinforcement;

[0106] Specifically, the geogrid is laid and assembled simultaneously during construction, and the anchoring claw 4 is fixed to the construction soil as a positioning point before the blasting is triggered.

[0107] S50. While unrolling the grid mesh 3, fix both the multi-cell plug-in prestressed reinforcement and the single-cell tenon-and-mortise reinforcement onto the grid mesh 3. Fix the anchor claw 4 onto the multi-cell plug-in prestressed reinforcement and extend it through the grid mesh 3 into the soil cover.

[0108] S60. Insert the anchoring claw pin 5 into the predetermined position;

[0109] S70. Place the backfill soil into the geogrid;

[0110] S80. Striking the striker causes the weak part of the anchor claw body to break open and penetrate into the soil.

[0111] S90, cover with soil and compact.

[0112] Specifically, the multi-cell plug-in prestressed reinforcement can have anchor claws fixed at the lower end. Before being triggered by pressure, the anchor claws can penetrate the soil to play a role in initial positioning and fixation. Similarly, the single-cell tenon-and-mortise type reinforcement, because the lower part of the internal tenon-and-mortise prestressed vertical plug-in valve 14 has a conical structure, can also penetrate the soil to play a role in positioning the prestressed prefabricated geogrid.

[0113] The material used in the preparation of prestressed geogrid reinforcement is a blend of polylactic acid (PLA) and natural latex. PLA has high strength but lacks toughness, so natural latex is used to improve its toughness. At the same time, it can be vulcanized to further enhance its durability and anti-aging properties.

[0114] Specifically, the prestressed geogrid is laid and assembled simultaneously during construction, and the anchoring claw 4 is fixed to the construction soil as a positioning point before the blasting is triggered.

[0115] The working principle of this invention is as follows:

[0116] In actual operation, the upper load acts on the arched structure of the geogrid, and the force is transmitted to the carbon fiber composite strand 7 and the anchoring nodes of the geogrid through the geogrid structure. On the one hand, after the repeated loads such as vehicle loads disappear, the carbon fiber composite strand 7 can guide the geogrid to restore its shape. On the other hand, the upper load causes the lower part of the geogrid to relax, which can apply greater external pressure to the connection of the prestressed geogrid transverse rib 2 and the prestressed geogrid longitudinal rib 1, thereby enhancing the stability of the structure assembly.

[0117] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A method for using a prestressed prefabricated geogrid, characterized in that, The prestressed prefabricated geogrid includes: Grille; A prestressed grid reinforcement is provided corresponding to the grid and fixed to the upper side of the grid to improve the vertical anti-settlement force. Multiple anchors are evenly spaced on the prestressed lattice reinforcement, and the anchors pass through the prestressed lattice reinforcement and the grid mesh from top to bottom, and are fixed in the soil. The prestressed grid reinforcement is a multi-cell plug-in prestressed reinforcement and / or a single-cell tenon-and-mortise reinforcement, and both are fixed to the upper side of the grid by anchors. The grid mesh is provided with multiple reserved holes; The multi-cell plug-in prestressed reinforcement includes: multiple prestressed grid longitudinal ribs and multiple prestressed grid transverse ribs that are plugged in; the multiple prestressed grid longitudinal ribs are arranged at intervals along a first direction of the grid; and the multiple prestressed grid transverse ribs are arranged at intervals along a second direction of the grid. The prestressed grid transverse ribs are provided with multiple grooves, the size of which is matched with the width of the prestressed grid longitudinal ribs, and the connection between the prestressed grid longitudinal ribs and the prestressed grid transverse ribs is fixed by anchors. The anchors, from top to bottom, include: An anchoring claw striker, wherein the anchoring claw striker is slidably disposed on the transverse rib of the prestressed grid, and the first end of the anchoring claw striker is located on the upper side of the transverse rib of the prestressed grid, and the second end penetrates the transverse rib of the prestressed grid and extends into the groove; The prestressed grid transverse rib buckle is set in the groove and sleeved on the outside of the second end of the anchor claw striker; The longitudinal ribs of the prestressed grid are provided with prestressed grid longitudinal rib slots, which are engaged with the transverse ribs of the prestressed grid. The first grid fixing end is fixed to the end of the prestressed grid longitudinal rib away from the prestressed grid transverse rib buckle, and is sleeved on the outside of the anchor claw striker. The first grid fixing end is provided with an anchor claw assembly thread, and the first grid fixing end is configured to cooperate with the reserved hole. An anchoring claw, which is detachably connected to the lower end of the first grid fixing end, and an assembly nut is correspondingly provided inside the anchoring claw; The anchoring claw includes: The anchoring claw body is conical and hollow. The mounting nut is located at the center of the hollow structure, and the second end of the anchoring claw striker abuts against the bottom end of the mounting nut. Multiple weak points are provided at intervals on the outer surface of the anchoring claw body. A mixture of pebbles and gunpowder, wherein the mixture of pebbles and gunpowder is disposed within the hollow structure and evenly wraps around the outside of the mounting nut. An anchoring claw trigger pad, wherein the anchoring claw trigger pad is disposed between the second end of the anchoring claw striking pin and the mixture of small stones and gunpowder; The single-cell zongzi-shaped tenon-and-mortise type reinforcement includes: a tenon-jointed prestressed horizontal square piece connected by mortise and tenon and a tenon-jointed prestressed vertical insertion valve at the four corners, and a second grid mesh fixing end is provided at the bottom of the tenon-jointed prestressed vertical insertion valve, which is configured to cooperate with the reserved hole. The four corners of the prestressed horizontal square piece and the prestressed vertical plug valve are provided with matching long tenons, short tenons and through tenons. The second grid mesh fixing end is tapered; The method of using the prestressed prefabricated geogrid includes the following steps: S10. Fabricate the grid mesh with pre-drilled holes. The grid mesh has multiple pre-drilled holes. S20, prestressed lattice longitudinal ribs, prestressed lattice transverse ribs, tenon-jointed prestressed horizontal square material, and tenon-jointed prestressed vertical plug valve are all manufactured by 3D printing, and the length of each section is the length of 3-7 grid mesh holes. S21. During the printing process, the longitudinal ribs of the prestressed lattice, the transverse ribs of the prestressed lattice, the tenon-jointed prestressed horizontal square material, and the tenon-jointed prestressed vertical plug valve are all printed from the upper surface of the lattice, and the long side of the lower surface of the lattice is made to be greater than the long side of the upper surface during the printing process. After the S30 prestressed lattice longitudinal ribs, prestressed lattice transverse ribs, tenon prestressed horizontal square material, and tenon prestressed vertical plug valve are printed and cooled, the carbon fiber composite stranded wire is anchored to the stranded wire fixed end using a riveting machine, and prestress is applied to it so that the projected area of ​​its upper and lower surfaces is equal. S40. Complete the assembly of the prestressed lattice reinforcement and the single-cell tenon-and-mortise reinforcement; S50. While unrolling the grid mesh, fix both the multi-cell plug-in prestressed reinforcement and the single-cell tenon-and-mortise reinforcement to the grid mesh, fix the anchor claws to the multi-cell plug-in prestressed reinforcement, and extend them through the grid mesh into the soil cover. S60. Insert the anchoring claw striker into the predetermined position; S70. Place the backfill soil into the geogrid; S80. Striking the striker causes the weak part of the anchor claw body to break open and penetrate into the soil. S90, cover with soil and compact.

2. The method of using the prestressed prefabricated geogrid according to claim 1, characterized in that, Both the multi-cell plug-in prestressed reinforcement and the single-cell tenon-and-mortise reinforcement have carbon fiber composite strands at their lower ends, and the carbon fiber composite strands are fixed to both ends of the reinforcement through the strand fixing end.

3. The method of using the prestressed prefabricated geogrid according to claim 1, characterized in that, Both the multi-cell plug-in prestressed reinforcement and the single-cell tenon-and-mortise reinforcement are provided with drainage holes at their lower ends, and the drainage holes are provided one-to-one with the ribs of the grid mesh.

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