Anti-landslide reinforcing engineering structure

Through the plug-in design of the reinforcement plate group, the limiting connecting frame and the fixed anchor, the problems of the existing anti-slope device having a single fixing method and poor aesthetics are solved, and the reinforcement and improvement of the aesthetics of the slope are achieved.

CN120649484APending Publication Date: 2025-09-16CHONGQING JIAOTONG UNIV
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Patent Information

Application Number
CN202510906378.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-02
Publication Date
2025-09-16

AI Technical Summary

Technical Problem

The existing anti-slip device is fixed in a single way by rivets, which affects the appearance and is inconvenient to construct. The T-block and T-slot affect the appearance and construction efficiency.

Method used

The design of reinforcement plate group, first limiting connecting frame and second limiting connecting frame is adopted to achieve the reinforcement of slope by plugging and fixing anchors, and the reinforcement plate group is designed in upper and lower layers to cover the connection points and improve the aesthetics.

Benefits of technology

The effective reinforcement of the slope is achieved, the aesthetics and construction efficiency of the device are improved, the replacement of the reinforcement plate group is convenient, and the problem of reduced aesthetics of the connection is avoided.

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Abstract

The invention discloses an anti-landslide reinforcing engineering structure which comprises a plurality of reinforcing plate sets, a plurality of anti-landslide reinforcing plates, a plurality of anti-landslide reinforcing plates, a plurality of anti-landslide reinforcing plates and a plurality of anti-landslide reinforcing plates. The first limiting connecting frames are connected with the end corners of the reinforcing plate sets in an inserted mode, the first limiting connecting frames are used for connecting the four adjacent reinforcing plate sets, and the first limiting connecting frames are further used for fixing the reinforcing plate sets and the side slope; and the second limiting connecting frames are connected with the end corners of the reinforcing plate sets in an inserted mode, and the second limiting connecting frames are used for connecting every two adjacent reinforcing plate sets. According to the anti-landslide reinforcing engineering structure, through the structural design of the reinforcing plate sets, the first limiting connecting frames and the second limiting connecting frames, the device can achieve the slope reinforcing effect, the reinforcing plate sets are designed in an up-and-down layered mode, the connecting positions can be shielded, the attractiveness of the device is effectively improved, and the anti-landslide reinforcing engineering structure is suitable for popularization and application. And the phenomenon that the aesthetic property is reduced due to connection at the edges of the reinforcing plate group is effectively avoided.
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Description

Technical Field

[0001] The invention relates to the technical field of anti-landslide structures, in particular to an anti-landslide reinforcement engineering structure. Background Art

[0002] In areas with a humid climate and frequent rain, landslides and collapses are prone to occur, which will block roads and endanger public transportation safety. In order to prevent landslides on the slopes, it is usually necessary to install anti-landslide devices on the slopes.

[0003] For example, a Chinese invention patent (CN217923674U) discloses a slope anti-landslide device, which states: "It includes an anti-landslide block, the rear side of the anti-landslide block is fixedly connected with a plurality of fixing nails, the top of the anti-landslide block is provided with four planting holes, one side of the anti-landslide block is fixedly connected with two T-blocks, the other side of the anti-landslide block is fixedly connected with a connecting plate, one side of the connecting plate is provided with two T-slots, compared with the use of rivets to fix the anti-landslide blocks, this design can quickly install and disassemble the anti-landslide blocks through a snap-on design, so that damaged anti-landslide blocks can be replaced later, making the use effect better, and the anti-landslide block can be fixed on the slope through a plurality of fixing nails, thereby making the anti-landslide block more firmly fixed, and thus better supporting the slope to avoid landslides."

[0004] Based on the above, it can be seen that the following technical problems exist in the prior art: the anti-slip blocks are fixed to the slope by rivets, the fixing method is relatively simple, and T-blocks and T-slots are provided on both sides. Although the connection between multiple anti-slip blocks is achieved, the protruding T-blocks of the anti-slip blocks on the edge affect the final construction of the project. At the same time, the protruding T-blocks and T-slots affect the aesthetics of the device. For this reason, the present application proposes an anti-slip reinforcement engineering structure to provide a new technical solution to solve the technical problems mentioned above. Summary of the Invention

[0005] Based on this, it is necessary to provide an anti-landslide reinforcement engineering structure to address the above technical problems. Through the structural design of the reinforcement plate group, the first limiting connecting frame, and the second limiting connecting frame, the device can achieve the reinforcement effect of the slope, and the upper and lower layered design of the reinforcement plate group can cover the connection, effectively improve the aesthetics of the device, and effectively avoid the phenomenon of reduced aesthetics due to the connection at the edge of the reinforcement plate group.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The invention discloses an anti-landslide reinforcement engineering structure, which is used for slope reinforcement.

[0008] The anti-landslide reinforcement engineering structure specifically includes:

[0009] A reinforcement plate group, wherein the number of the reinforcement plate groups is multiple and the multiple reinforcement plate groups are arranged in a rectangular array;

[0010] A first limiting connecting frame, which is plug-connected to the end corners of the reinforcement plate group, and is used to connect four adjacent reinforcement plate groups. The first limiting connecting frame is also used to fix the reinforcement plate group to the slope;

[0011] A second limiting connecting frame, which is plug-connected to the end corners of the reinforcement plate group. The second limiting connecting frame is used to connect two adjacent reinforcement plate groups and is also used to fix the reinforcement plate group to the slope;

[0012] The reinforcement plate group includes a reinforcement frame and a beautification frame, the reinforcement frame and the beautification frame are stacked up and down, a window is provided in the middle of the reinforcement frame, a recessed portion is provided in the middle of the beautification frame, the recessed portion is plug-connected to the window, and a plurality of through slots are provided in the middle of the recessed portion;

[0013] The reinforcement frame is provided with a receiving groove at the end corner, and an insertion through hole is provided at one end of the receiving groove close to the center of the reinforcement frame. The four end corners of the lower end of the beautification frame are provided with protrusions, and the protrusions are plug-connected with the receiving groove; the reinforcement frame and the beautification frame are respectively provided with through hole one and through hole two at the end corners, and the through hole one and the corresponding through hole two are connected by pins.

[0014] As a preferred embodiment of the anti-landslide reinforcement engineering structure provided by the present invention, the first limiting connecting frame includes a square frame, and a fixing anchor 1 is provided at the four end corners of the lower end of the square frame. The square frame is located inside the accommodating groove, and the fixing anchor 1 passes through the corresponding accommodating groove and is plugged into the slope. A through hole 3 is opened on the square frame, and the through hole 3 corresponds to the position of the through hole 1 and the through hole 2. The pin used to connect the through hole 1 and the through hole 2 is plugged into the through hole 3.

[0015] As a preferred embodiment of the anti-landslide reinforcement engineering structure provided by the present invention, the second limiting connecting frame includes a rectangular frame, and a fixing anchor 2 is provided at the two end corners of the lower end of the rectangular frame and close to the reinforcement plate group. The rectangular frame is plugged into the accommodating groove, and the fixing anchor 2 passes through the corresponding accommodating groove and is plugged into the slope. A through hole 4 is opened on the rectangular frame, and the through hole 4 corresponds to the position of the through hole 1 and the through hole 2. The pin used to connect the through hole 1 and the through hole 2 is plugged into the through hole 4.

[0016] As a preferred embodiment of the anti-landslide reinforcement engineering structure provided by the present invention, the square frame is plug-connected with a fixing anchor, and the square frame and the fixing anchor are detachably fixed by fixing screws.

[0017] As a preferred embodiment of the anti-landslide reinforcement engineering structure provided by the present invention, the rectangular frame is plug-connected with the second fixing anchor, and the rectangular frame and the second fixing anchor are detachably fixed by a second fixing screw.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The anti-slip slope reinforcement engineering structure provided by the present invention enables the device to achieve the reinforcement effect of the slope through the structural design of the reinforcement plate group, the first limiting connecting frame, and the second limiting connecting frame. The upper and lower layered design of the reinforcement plate group can shield the connection points, effectively improving the aesthetics of the device and effectively avoiding the phenomenon of reduced aesthetics caused by the connection at the edge of the reinforcement plate group.

[0020] The anti-slip slope reinforcement engineering structure provided by the present invention can realize the connection and limitation between multiple reinforcement plate groups through the structural design of the first limiting connecting frame and the second limiting connecting frame, and can also realize the fixation of multiple reinforcement plate groups to the slope, and is more convenient and labor-saving when the reinforcement plate groups need to be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the solutions in the present invention, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 A schematic diagram of the overall structure of the anti-landslide reinforcement engineering structure provided by the present invention;

[0023] Figure 2 A schematic diagram of the structure of the reinforcement plate group for the anti-landslide reinforcement engineering structure provided by the present invention;

[0024] Figure 3 A schematic diagram showing the positions of the first and second position-limiting connecting frames of the anti-landslide reinforcement engineering structure provided by the present invention;

[0025] Figure 4 A schematic structural diagram of the first position-limiting connecting frame of the anti-landslide reinforcement engineering structure provided by the present invention;

[0026] Figure 5 This is a structural schematic diagram of the second limiting connecting frame of the anti-landslide reinforcement engineering structure provided by the present invention.

[0027] The markings in the figure are as follows:

[0028] 1. Reinforcement plate assembly; 2. Reinforcement frame; 3. Beautification frame; 4. Window; 5. Recessed portion; 6. Through slot; 7. Accommodating slot; 8. Insertion hole; 9. Protrusion; 10. First position-limiting connecting frame; 11. Second position-limiting connecting frame; 12. Square frame; 13. Fixing anchor 1; 14. Rectangular frame; 15. Fixing anchor 2; 16. Fixing screw 1; 17. Fixing screw 2; 18. Through hole 1; 19. Through hole 2; 20. Through hole 3; 21. Through hole 4. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0030] As described in the background technology, the anti-slip blocks are fixed to the slope by rivets, and the fixing method is relatively simple. T-blocks and T-slots are provided on both sides. Although the connection between multiple anti-slip blocks is achieved, the protruding T-blocks of the anti-slip blocks on the edge affect the final construction of the project. At the same time, the protruding T-blocks and T-slots affect the aesthetics of the device.

[0031] In order to solve this technical problem, the present invention provides an anti-landslide reinforcement engineering structure, which is applied to slope reinforcement.

[0032] Specifically, please refer to Figure 1 - Figure 3 The anti-landslide reinforcement engineering structure specifically includes:

[0033] Reinforcement plate group 1, the number of reinforcement plate groups 1 is multiple, and the multiple reinforcement plate groups 1 are arranged in a rectangular array;

[0034] The first limiting connecting frame 10 is plugged into the end corners of the reinforcement plate group 1. The first limiting connecting frame 10 is used to connect four adjacent reinforcement plate groups 1. The first limiting connecting frame 10 is also used to fix the reinforcement plate group 1 to the slope;

[0035] The second limiting connecting frame 11 is plugged into the end corner of the reinforcement plate group 1. The second limiting connecting frame 11 is used to connect two adjacent reinforcement plate groups 1. The second limiting connecting frame 11 is also used to fix the reinforcement plate group 1 to the slope;

[0036] The reinforcement plate assembly 1 includes a reinforcement frame 2 and a beautification frame 3. The reinforcement frame 2 and the beautification frame 3 are stacked up and down. A window 4 is provided in the middle of the reinforcement frame 2. A recessed portion 5 is provided in the middle of the beautification frame 3. The recessed portion 5 is plugged into the window 4. A plurality of through slots 6 are provided in the middle of the recessed portion 5.

[0037] An accommodating groove 7 is provided at the end corner of the reinforcement frame 2, and an insertion through hole 8 is provided at one end of the accommodating groove 7 close to the center of the reinforcement frame 2. A protrusion 9 is provided at the four end corner positions of the lower end of the beautification frame 3, and the protrusion 9 is plugged into the accommodating groove 7; a through hole 18 and a through hole 2 19 are respectively provided at the end corner positions of the reinforcement frame 2 and the beautification frame 3, and the through hole 18 and the corresponding through hole 2 19 are connected by pins.

[0038] The anti-slip slope reinforcement engineering structure provided by the present invention enables the device to achieve the reinforcement effect of the slope through the structural design of the reinforcement plate group 1, the first limiting connecting frame 10, and the second limiting connecting frame 11. The reinforcement plate group 1 is designed in upper and lower layers, which can shield the connection points, effectively improve the aesthetics of the device, and effectively avoid the phenomenon of reduced aesthetics caused by the connection at the edge of the reinforcement plate group 1.

[0039] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0040] Example 1:

[0041] Please refer to Figure 1 - Figure 3 , an anti-landslide reinforcement engineering structure, comprising:

[0042] Reinforcement plate group 1, the number of reinforcement plate groups 1 is multiple, and the multiple reinforcement plate groups 1 are arranged in a rectangular array;

[0043] The first limiting connecting frame 10 is plugged into the end corners of the reinforcement plate group 1. The first limiting connecting frame 10 is used to connect the four adjacent reinforcement plate groups 1. The first limiting connecting frame 10 is also used to fix the reinforcement plate group 1 to the slope. The four adjacent reinforcement plate groups 1 can be connected at their end corners by the first limiting connecting frame 10. At the same time, the four adjacent reinforcement plate groups 1 can be fixed to the slope at their end corners by plugging the first limiting connecting frame 10 into the slope.

[0044] The second limiting connecting frame 11 is plugged into the end corners of the reinforcement plate group 1. The second limiting connecting frame 11 is used to connect two adjacent reinforcement plate groups 1. The second limiting connecting frame 11 is also used to fix the reinforcement plate group 1 to the slope. The second limiting connecting frame 11 can be used to connect the end corners of two adjacent reinforcement plate groups 1. At the same time, the second limiting connecting frame 11 is plugged into the slope to achieve the fixation of the end corners of four adjacent reinforcement plate groups 1 to the slope.

[0045] Specifically, the reinforcement plate group 1 includes a reinforcement frame 2 and a beautification frame 3, which are stacked up and down. A window 4 is provided in the middle of the reinforcement frame 2, and a recessed portion 5 is provided in the middle of the beautification frame 3. The recessed portion 5 is plugged into the window 4, and a plurality of through slots 6 are provided in the middle of the recessed portion 5.

[0046] It can be seen that through the upper and lower layered design of the reinforcement plate group 1, after the reinforcement frame 2 is fixed to the slope through the first limiting connecting frame 10 and the second limiting connecting frame 11, the beautification frame 3 can be placed above the reinforcement frame 2, so that the first limiting connecting frame 10 and the second limiting connecting frame 11 are blocked by the end corners of the beautification frame 3, thereby achieving protection of the connection of the reinforcement plate group 1 and at the same time achieving the beautification effect of the connection of the reinforcement plate group 1; and through the recessed portion 5 opened in the middle of the beautification frame 3, the inside of the recessed portion 5 can be filled with soil to plant green plants, and the roots of the green plants can pass through the through groove 6 and extend into the slope to grow, thereby stabilizing the slope and reducing soil erosion.

[0047] An accommodating groove 7 is provided at the end corner of the reinforcement frame 2, and an insertion through hole 8 is provided at one end of the accommodating groove 7 close to the center of the reinforcement frame 2. A protrusion 9 is provided at the four end corner positions of the lower end of the beautification frame 3, and the protrusion 9 is plugged into the accommodating groove 7; a through hole 18 and a through hole 2 19 are respectively provided at the end corner positions of the reinforcement frame 2 and the beautification frame 3, and the through hole 18 and the corresponding through hole 2 19 are connected by pins.

[0048] It can be seen that the upper parts of the first limiting connecting frame 10 and the second limiting connecting frame 11 can be located inside the accommodating groove 7, and the lower ends of the first limiting connecting frame 10 and the second limiting connecting frame 11 can be connected to the slope through the insertion hole 8, and the connection strength of the reinforcement frame 2 and the beautification frame 3 can be improved through the protrusion 9.

[0049] Example 2:

[0050] The anti-landslide reinforcement engineering structure provided in Example 1 is further optimized. Specifically, Figure 4As shown, the first limiting connecting frame 10 includes a square frame 12, and a fixing anchor 13 is provided at the four end corners of the lower end of the square frame 12. The square frame 12 is located inside the accommodating groove 7, and the fixing anchor 13 passes through the corresponding accommodating groove 7 and is plugged into the slope. A through hole 3 20 is opened on the square frame 12, and the through hole 3 20 corresponds to the position of the through hole 1 18 and the through hole 2 19. The pin used for connecting the through hole 18 and the through hole 2 19 is plugged into the through hole 3 20.

[0051] Through the above structural design, after multiple reinforcement frames 2 are laid, the first limiting connecting frame 10 is installed so that the square frame 12 extends into the accommodating groove 7, and the fixing anchors 13 at the four end corners of the square frame 12 respectively pass through the insertion holes 8 opened at the end corners of the four adjacent reinforcement frames 2 and are plugged into the slope, so that the four adjacent reinforcement frames 2 are connected through the cooperation of the square frame 12 and the fixing anchors 13, and the reinforcement frame 2 and the slope are fixed at the same time; after the first limiting connecting frame 10 is installed, the beautification frame 3 is placed above the reinforcement frame 2 to cover the first limiting connecting frame 10, and the pin is inserted so that the pin passes through the beautification frame 3, the first limiting connecting frame 10, and the reinforcement frame 2 in turn, thereby realizing the connection between the three components, which can further improve the firmness of the connection.

[0052] Example 3:

[0053] The anti-landslide reinforcement engineering structure provided in Example 1 is further optimized. Specifically, Figure 5 As shown, the second limiting connecting frame 11 includes a rectangular frame 14, and a second fixing anchor 15 is provided at the two end corners of the lower end of the rectangular frame 14 and close to the reinforcement plate group 1. The rectangular frame 14 is plugged into the accommodating groove 7, and the second fixing anchor 15 passes through the corresponding accommodating groove 7 and is plugged into the slope. A fourth through hole 21 is opened on the rectangular frame 14, and the fourth through hole 21 corresponds to the position of the first through hole 18 and the second through hole 19. The pin used for connecting the first through hole 18 and the second through hole 19 is plugged into the fourth through hole 21.

[0054] Through the above structural design, after multiple reinforcement frames 2 are laid, the second limiting connecting frame 11 is installed so that the rectangular frame 14 extends into the accommodating groove 7, and the fixing anchors 2 15 at the two end corners of the rectangular frame 14 respectively pass through the insertion holes 8 opened at the end corners of the four adjacent reinforcement frames 2 and are plugged into the slope, so that the four adjacent reinforcement frames 2 are connected through the cooperation of the rectangular frame 14 and the fixing anchors 2 15, and the reinforcement frame 2 and the slope are fixed at the same time; after the second limiting connecting frame 11 is installed, the beautification frame 3 is placed above the reinforcement frame 2 to cover the second limiting connecting frame 11, and the pin is inserted so that the pin passes through the beautification frame 3, the second limiting connecting frame 11, and the reinforcement frame 2 in turn, thereby realizing the connection between the three components, which can further improve the firmness of the connection.

[0055] Example 4:

[0056] The anti-landslide reinforcement engineering structures provided in the second and third embodiments are further optimized. Specifically, Figure 4-Figure 5 As shown, the square frame 12 is plugged into the fixing anchor 13, and the square frame 12 and the fixing anchor 13 are detachably fixed by fixing screw 16. The rectangular frame 14 is plugged into the fixing anchor 2 15, and the rectangular frame 14 and the fixing anchor 2 15 are detachably fixed by fixing screw 2 17.

[0057] Through the above structural design, when the slope is replaced, the pins at the connection are removed and the beautification frame 3 is taken out from the upper end of the reinforcement frame 2. Through the detachable design of the first limiting connection frame 10 and the second limiting connection frame 11, the fixing screws 16 and 17 can be removed, so that the square frame 12 and the fixing anchor 1 13, and the rectangular frame 14 and the fixing anchor 2 15 can be separated. After the square frame 12 and the rectangular frame 14 are removed, the reinforcement frame 2 can be removed from the slope, and then the fixing anchor 13 and the fixing anchor 2 15 inserted into the slope can be taken out. Through this design, the removal of the first limiting connection frame 10 and the second limiting connection frame 11 will not be affected by the reinforcement frame 2, so that the removal operation is more convenient.

Claims

1. A landslide prevention reinforcement engineering structure, characterized in that: include: A reinforcement plate group (1), wherein the number of the reinforcement plate groups (1) is multiple, and the multiple reinforcement plate groups (1) are arranged in a rectangular array; A first position-limiting connecting frame (10), the first position-limiting connecting frame (10) is plug-connected to the end corners of the reinforcement plate group (1), the first position-limiting connecting frame (10) is used to connect four adjacent reinforcement plate groups (1), and the first position-limiting connecting frame (10) is also used to fix the reinforcement plate group (1) to the slope; A second position-limiting connecting frame (11), the second position-limiting connecting frame (11) is plug-connected to the end corners of the reinforcement plate group (1), the second position-limiting connecting frame (11) is used to connect two adjacent reinforcement plate groups (1), and the second position-limiting connecting frame (11) is also used to fix the reinforcement plate group (1) to the slope; The reinforcement plate group (1) comprises a reinforcement frame (2) and a beautification frame (3), wherein the reinforcement frame (2) and the beautification frame (3) are stacked up and down, a window (4) is provided in the middle of the reinforcement frame (2), and a recessed portion (5) is provided in the middle of the beautification frame (3), wherein the recessed portion (5) is plug-connected to the window (4), and a plurality of through slots (6) are provided in the middle of the recessed portion (5); The reinforcement frame (2) is provided with a receiving groove (7) at an end corner thereof, and an insertion through hole (8) is provided at one end of the receiving groove (7) close to the center of the reinforcement frame (2). The four end corner positions of the lower end of the beautification frame (3) are all provided with protrusions (9), and the protrusions (9) are plug-connected with the receiving groove (7); the reinforcement frame (2) and the beautification frame (3) are respectively provided with a first through hole (18) and a second through hole (19) at the end corner positions, and the first through hole (18) and the corresponding second through hole (19) are connected by a pin.

2. The anti-landslide reinforcement engineering structure according to claim 1, characterized in that: The first position-limiting connecting frame (10) comprises a square frame (12), and the four end corners of the lower end of the square frame (12) are all provided with a fixing anchor (13), the square frame (12) is located inside the receiving groove (7), and the fixing anchor (13) passes through the corresponding receiving groove (7) and is plugged into the slope. A through hole (20) is opened on the square frame (12), and the through hole (20) corresponds to the position of the through hole (18) and the through hole (19), and the pin used for connecting the through hole (18) and the through hole (19) is plugged into the through hole (20).

3. The anti-landslide reinforcement engineering structure according to claim 1, characterized in that: The second position-limiting connecting frame (11) comprises a rectangular frame (14), and two fixing anchors (15) are provided at the lower end of the rectangular frame (14) and at two end corner positions close to one side of the reinforcing plate group (1). The rectangular frame (14) is plug-connected with the receiving groove (7), and the fixing anchor (15) passes through the corresponding receiving groove (7) and is plug-connected with the slope. A through hole (21) is provided on the rectangular frame (14), and the through hole (21) corresponds to the position of the through hole (18) and the through hole (19). The pin for connecting the through hole (18) and the through hole (19) is plug-connected with the through hole (21).

4. The anti-landslide reinforcement engineering structure according to claim 2, characterized in that: The square frame (12) is plug-connected with the fixing anchor (13), and the square frame (12) and the fixing anchor (13) are detachably fixed by fixing screws (16).

5. The anti-landslide reinforcement engineering structure according to claim 3, characterized in that: The rectangular frame (14) is plug-connected with the second fixing anchor (15), and the rectangular frame (14) and the second fixing anchor (15) are detachably fixed by the second fixing screw (17).

Citation Information

Patent Citations

  • Anti-landslide device for side slope

    CN217923674U