Lattice beam and anchor rod composite expansive soil slope ecological protection device

Abstract

The utility model discloses a lattice girder and anchor rod composite expansive soil side slope ecological protection device which comprises a side slope body, a lattice girder system is arranged on the side slope body, the lattice girder system is formed by a plurality of transverse lattice girders and longitudinal lattice girders in a staggered mode, the lattice girder system is a prefabricated reinforced concrete member, and the longitudinal lattice girders and the transverse lattice girders are arranged in a staggered mode. The bottom of the lattice beam system is embedded in the side slope body, the lattice beam system and the side slope body are fixed through a plurality of anchor rods, a space formed by transverse lattice beams and longitudinal lattice beams in the lattice beam system serves as a planting groove, and the planting groove is internally covered with an ecological soil bag. A drainage mechanism is mounted at the position, aligned with each planting groove, of the transverse lattice beam. The advantages of the lattice beam system and the anchor rod are fully exerted through the composite structure of the lattice beam system and the anchor rod, the anchor rod can effectively improve the anti-sliding force of the slope soil body, the lattice beam can restrain the expansion deformation of the surface soil body of the slope, and the lattice beam system and the lattice beam system are matched with each other, so that the stability of the expansive soil slope is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of slope protection technology, specifically to an ecological protection device for expansive soil slopes that combines lattice beams and anchor rods. Background Technology

[0002] Expansive soil is a type of cohesive soil with significant water absorption and shrinkage characteristics, and it is widely distributed in my country. Expansive soil slopes are highly susceptible to deformation and damage, such as landslides and collapses, under the influence of natural environmental changes (e.g., rainfall, drought) and human engineering activities, seriously threatening the safety of surrounding buildings and structures and the lives and property of people. Traditional methods for protecting expansive soil slopes mainly include gravity retaining walls and masonry revetments, but these methods have many drawbacks. For example, gravity retaining walls require a large amount of masonry materials, have a large self-weight, and require high foundation bearing capacity; their protective effect is limited and they cannot achieve ecological restoration. While masonry revetments offer some protection, they also lack effective regulation of the internal stress of the slope soil and damage the natural ecological environment of the slope, hindering soil and water conservation and vegetation growth. Therefore, some new slope protection devices have emerged.

[0003] For example, utility model patent with publication number CN218060354U discloses a high slope reinforcement and protection structure, including a horizontal beam, a vertical beam, a soil fixing device, a baffle, and a drainage device. The horizontal beam is arranged parallel to the slope surface of the high slope, and the vertical beam is arranged between the horizontal beams. The horizontal beam and the vertical beam divide the slope surface of the high slope into a grid. The soil fixing device is arranged in the grid and filled with grass seed soil. The baffle is parallel to the horizontal beam and is arranged on the bottom plane of the high slope. The drainage device is arranged inside the slope body.

[0004] The aforementioned patent provides a slope protection device that utilizes lattice beams for slope protection. This reduces soil erosion, simplifies construction procedures, lowers costs, and improves reinforcement and protection effects. However, existing lattice beam protection structures have large gaps between the beams, which is detrimental to vegetation growth and ecological restoration. Furthermore, on expansive soil slopes, rainwater easily seeps into the soil during rainfall, causing it to expand and soften. This leads to soil on the inner side of the lattice beams easily flowing out with the rainwater, exacerbating the difficulty of vegetation restoration. Utility Model Content

[0005] The purpose of this utility model is to provide an ecological protection device for expansive soil slopes that combines lattice beams and anchor rods. It aims to improve the existing lattice beam protection structure, which has large gaps between lattice beams during use, which is not conducive to vegetation growth and ecological restoration. In addition, during rainfall, rainwater easily seeps into the soil of expansive soil slopes, causing the soil inside the lattice beams to easily flow out with the rainwater, exacerbating the difficulty of vegetation restoration.

[0006] This utility model is implemented as follows:

[0007] An ecological protection device for expansive soil slopes, comprising a composite of lattice beams and anchors, includes a slope body on which a lattice beam system is provided. The lattice beam system is formed by multiple interlaced horizontal and vertical lattice beams. The lattice beam system is a precast reinforced concrete component. The bottom of the lattice beam system is embedded in the slope body, and the lattice beam system and the slope body are fixed by multiple anchors. The space formed by the horizontal and vertical lattice beams in the lattice beam system is designated as a planting trough. The planting trough is covered with an ecological geotextile bag. Drainage mechanisms are installed at the positions of the horizontal lattice beams aligned with each planting trough.

[0008] Preferably, the slope body is provided with an embedding groove, the cross sections of the horizontal and vertical grid beams are inverted T-shaped, and the bottoms of the horizontal and vertical grid beams are embedded in the embedding groove.

[0009] Preferably, an elastic buffer layer is provided between the lattice beam system and the slope body, the elastic buffer layer is made of foamed concrete, and the elastic buffer layer covers the contact surface between the lattice beam and the slope.

[0010] Preferably, the horizontal lattice beams are provided with mounting holes at the positions aligned with the planting troughs, and a pressure-bearing platform is provided at the intersection of the horizontal and vertical lattice beams. An anchoring hole is provided in the middle of the pressure-bearing platform, the anchoring hole penetrates the lattice beam system, and a pressure-bearing sleeve is provided at the top of the anchoring hole.

[0011] Preferably, the bottom end of the anchor rod is provided with an anchoring joint, and the side of the anchoring joint is evenly provided with multiple barbs, which are inclined upwards and do not affect the anchor rod passing through the anchoring hole.

[0012] Preferably, the anchor rod is provided with a screw at the top, and a pressure cap is provided at one end of the screw that protrudes from the anchor hole. A gasket is provided between the pressure cap and the pressure plate.

[0013] Preferably, the planting trough is filled with nutrient soil, and the ecological geotextile bag is filled with improved expanded soil and plant seeds. The adjacent ecological geotextile bags are connected to each other, so that the ecological geotextile bags in each planting trough form a whole.

[0014] Preferably, the drainage mechanism is hollow inside and has an opening at the top, the top edge of the drainage mechanism is provided with a limiting protrusion, the drainage mechanism is filled with filter sand, and the bottom surface of the drainage mechanism is provided with water-permeable holes.

[0015] Preferably, it also includes a filter tray, the bottom of the slope body is provided with a drainage ditch, the top of the drainage ditch is symmetrically provided with limiting grooves on both sides, the filter tray is set on the top of the drainage ditch, and the two sides of the filter tray are pressed into the limiting grooves.

[0016] Preferably, the filter tray has symmetrical pressing edges on both sides, the pressing edges are pressed against the inner side of the limiting pressing groove, and the inner side of the filter tray is provided with a sand and gravel pad, and the filter tray is provided with multiple gripping rods.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model fully leverages the advantages of a composite structure combining a lattice beam system and anchor rods. Anchor rods effectively enhance the slope's anti-sliding capacity, while the lattice beams constrain the expansion and contraction deformation of the surface soil. Together, they significantly improve the stability of expansive soil slopes. The planting troughs inside the lattice beam system and the ecological geotextile bags on the slope surface provide a favorable environment for vegetation growth, achieving ecological protection of the slope and contributing to soil and water conservation and ecological restoration, aligning with green environmental protection principles. A drainage mechanism at the bottom of the horizontal lattice beams effectively drains rainwater from the planting troughs, reducing soil moisture content and minimizing the expansion and contraction deformation of the expansive soil, further improving slope stability and preventing water accumulation in the planting troughs that could cause the expansive soil to expand and loosen. The lattice beams utilize prefabricated components, facilitating convenient and rapid construction, reducing on-site construction time and costs, and improving construction efficiency.

[0019] 2. The bottom of the slope body of this utility model is provided with a drainage ditch, and a filter tray is provided at the opening above the drainage ditch. The tray can block large particles of impurities from entering the drainage ditch and can filter out the soil mixed in the water, thus preventing soil loss. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the slope body of this utility model;

[0022] Figure 3 This is a structural schematic diagram of the lattice beam system of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the anchor rod of this utility model;

[0024] Figure 5 This is a schematic diagram of the drainage mechanism of this utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the filter tray of this utility model.

[0026] In the diagram: 1. Slope body; 11. Drainage ditch; 12. Limiting groove; 13. Embedded groove; 2. Grid beam system; 21. Longitudinal grid beam; 22. Horizontal grid beam; 220. Mounting hole; 221. Planting trough; 222. Pressure bearing platform; 223. Anchor hole; 224. Pressure bearing sleeve; 3. Anchor rod; 31. Anchoring joint; 32. Barb; 33. Screw; 34. Pressure cap; 35. Gasket; 4. Ecological geotextile bag; 5. Drainage mechanism; 51. Limiting protrusion; 52. Filter sand and gravel; 6. Filter tray; 61. Edge pressing; 62. Sand and gravel cushion layer; 63. Holding rod. Detailed implementation method:

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0029] Example 1

[0030] like Figure 1 and Figure 3 As shown, an ecological protection device for expansive soil slopes, combining lattice beams and anchor rods 3, includes a slope body 1. A lattice beam system 2 is installed on the slope body 1. The lattice beam system 2 consists of multiple interlaced horizontal lattice beams 22 and longitudinal lattice beams 21. The slope body 1, in conjunction with the lattice beam system 2, can effectively protect the slope. The lattice beam system 2 is a precast reinforced concrete component, which can be directly transported to the slope, avoiding the cumbersome process of pouring lattice beams onto the slope body 1, effectively saving construction time and significantly shortening the construction period. The bottom of the lattice beam system 2 is embedded in the slope body 1, and the lattice beam system 2 and the slope body 1 are fixed together using multiple anchor rods 3. This further secures the lattice beam system 2, ensuring its stability. In the lattice beam system 2, the space enclosed by the horizontal lattice beams 22 and the vertical lattice beams 21 is designated as a planting trough 221. The planting trough 221 is covered with an ecological geotextile bag 4. The planting trough 221 and the ecological geotextile bag 4 facilitate planting, thereby further protecting the slope. Each horizontal lattice beam 22 is equipped with a drainage mechanism 5 aligned with the position of each planting trough 221. The drainage mechanism 5 facilitates the discharge of accumulated water from the planting trough 221, preventing water accumulation from affecting the slope.

[0031] like Figure 2As shown, the slope body 1 is provided with an embedded groove 13, and the cross sections of the horizontal lattice beam 22 and the longitudinal lattice beam 21 are inverted T-shaped. The bottom of the horizontal lattice beam 22 and the longitudinal lattice beam 21 are buried in the front insertion groove. This structure facilitates the stable installation of the lattice beam system 2 on the slope body 1 and ensures the stability of the lattice beam system 2.

[0032] like Figure 3 As shown, an elastic buffer layer is provided between the lattice beam system 2 and the slope body 1. The elastic buffer layer is made of foamed concrete and covers the contact surface between the lattice beam and the slope. The thickness of the elastic buffer layer is 2-3cm to facilitate buffering between the lattice beam system 2 and the slope body 1. The horizontal lattice beam 22 has an installation hole 220 aligned with the planting trough 221, which facilitates the installation of the drainage mechanism 5. A pressure-bearing platform 222 is provided at the intersection of the horizontal lattice beam 22 and the longitudinal lattice beam 21. An anchoring hole 223 is provided in the middle of the pressure-bearing platform 222, penetrating the lattice beam system 2. A pressure-bearing sleeve 224 is provided at the top of the anchoring hole 223. The pressure-bearing platform 222, in conjunction with the anchoring hole 223, facilitates the installation and fixing of the anchor rod 3, ensuring that the anchor rod 3 can pass through the lattice beam system 2 and fix the lattice beam system 2. The pressure-bearing sleeve 224 ensures that the anchor rod 3 can be stably connected to the lattice beam system 2.

[0033] like Figure 4 As shown, the bottom end of the anchor rod 3 is provided with an anchoring joint 31. Multiple barbs 32 are evenly distributed on the side of the anchoring joint 31, with the barbs 32 angled upwards. The barbs 32 do not affect the anchor rod 3 passing through the anchoring hole 223. This structure facilitates the anchor rod 3 passing through the anchoring hole 223, making it easier to stably fix the lattice beam system 2 onto the slope body 1. The top of the anchor rod 3 is provided with a threaded rod 33. One end of the threaded rod 33 that protrudes from the anchoring hole 223 is provided with a pressure cap 34. A gasket 35 is provided between the pressure cap 34 and the pressure plate 222. This structure facilitates the pressure cap 34 and the gasket 35 to be pressed tightly onto the lattice beam system 2, ensuring the stability of the lattice beam system 2 on the slope body 1.

[0034] like Figure 1 and Figure 3 As shown, the planting trough 221 is filled with nutrient soil, and the ecological geotextile bag 4 is filled with improved expanded soil and plant seeds. The adjacent ecological geotextile bags 4 are connected to each other, so that the ecological geotextile bags 4 inside each planting trough 221 form a whole. This structure can effectively prevent soil loss, ensure a stable growth environment for plants, and effectively improve the slope protection effect.

[0035] like Figure 5As shown, the drainage mechanism 5 is hollow inside with an opening at the top, facilitating stable drainage and filtration of rainwater. A limiting protrusion 51 is provided at the top edge of the drainage mechanism 5 to ensure it is securely pressed against the edge of the mounting hole 220, guaranteeing its stability within the hole. The drainage mechanism 5 is filled with filter sand 52, and its bottom surface has permeable holes. The filter sand 52, in conjunction with the permeable holes, facilitates rainwater filtration, preventing soil erosion from the rainwater.

[0036] Example 2

[0037] like Figure 1 and Figure 3 As shown, an ecological protection device for expansive soil slopes, combining lattice beams and anchor rods 3, includes a slope body 1. A lattice beam system 2 is installed on the slope body 1. The lattice beam system 2 consists of multiple interlaced horizontal lattice beams 22 and longitudinal lattice beams 21. The slope body 1, in conjunction with the lattice beam system 2, can effectively protect the slope. The lattice beam system 2 is a precast reinforced concrete component, which can be directly transported to the slope, avoiding the cumbersome process of pouring lattice beams onto the slope body 1, effectively saving construction time and significantly shortening the construction period. The bottom of the lattice beam system 2 is embedded in the slope body 1, and the lattice beam system 2 and the slope body 1 are fixed together using multiple anchor rods 3. This further secures the lattice beam system 2, ensuring its stability. In the lattice beam system 2, the space enclosed by the horizontal lattice beams 22 and the vertical lattice beams 21 is designated as a planting trough 221. The planting trough 221 is covered with an ecological geotextile bag 4. The planting trough 221 and the ecological geotextile bag 4 facilitate planting, thereby further protecting the slope. Each horizontal lattice beam 22 is equipped with a drainage mechanism 5 aligned with the position of each planting trough 221. The drainage mechanism 5 facilitates the discharge of accumulated water from the planting trough 221, preventing water accumulation from affecting the slope.

[0038] like Figure 2 As shown, the slope body 1 is provided with an embedded groove 13, and the cross sections of the horizontal lattice beam 22 and the longitudinal lattice beam 21 are inverted T-shaped. The bottom of the horizontal lattice beam 22 and the longitudinal lattice beam 21 are buried in the front insertion groove. This structure facilitates the stable installation of the lattice beam system 2 on the slope body 1 and ensures the stability of the lattice beam system 2.

[0039] like Figure 3As shown, an elastic buffer layer is provided between the lattice beam system 2 and the slope body 1. The elastic buffer layer is made of foamed concrete and covers the contact surface between the lattice beam and the slope. The thickness of the elastic buffer layer is 2-3cm to facilitate buffering between the lattice beam system 2 and the slope body 1. The horizontal lattice beam 22 has an installation hole 220 aligned with the planting trough 221, which facilitates the installation of the drainage mechanism 5. A pressure-bearing platform 222 is provided at the intersection of the horizontal lattice beam 22 and the longitudinal lattice beam 21. An anchoring hole 223 is provided in the middle of the pressure-bearing platform 222, penetrating the lattice beam system 2. A pressure-bearing sleeve 224 is provided at the top of the anchoring hole 223. The pressure-bearing platform 222, in conjunction with the anchoring hole 223, facilitates the installation and fixing of the anchor rod 3, ensuring that the anchor rod 3 can pass through the lattice beam system 2 and fix the lattice beam system 2. The pressure-bearing sleeve 224 ensures that the anchor rod 3 can be stably connected to the lattice beam system 2.

[0040] like Figure 4 As shown, the bottom end of the anchor rod 3 is provided with an anchoring joint 31. Multiple barbs 32 are evenly distributed on the side of the anchoring joint 31, with the barbs 32 angled upwards. The barbs 32 do not affect the anchor rod 3 passing through the anchoring hole 223. This structure facilitates the anchor rod 3 passing through the anchoring hole 223, making it easier to stably fix the lattice beam system 2 onto the slope body 1. The top of the anchor rod 3 is provided with a threaded rod 33. One end of the threaded rod 33 that protrudes from the anchoring hole 223 is provided with a pressure cap 34. A gasket 35 is provided between the pressure cap 34 and the pressure plate 222. This structure facilitates the pressure cap 34 and the gasket 35 to be pressed tightly onto the lattice beam system 2, ensuring the stability of the lattice beam system 2 on the slope body 1.

[0041] like Figure 1 and Figure 3 As shown, the planting trough 221 is filled with nutrient soil, and the ecological geotextile bag 4 is filled with improved expanded soil and plant seeds. The adjacent ecological geotextile bags 4 are connected to each other, so that the ecological geotextile bags 4 inside each planting trough 221 form a whole. This structure can effectively prevent soil loss, ensure a stable growth environment for plants, and effectively improve the slope protection effect.

[0042] like Figure 5 As shown, the drainage mechanism 5 is hollow inside with an opening at the top, facilitating stable drainage and filtration of rainwater. A limiting protrusion 51 is provided at the top edge of the drainage mechanism 5 to ensure it is securely pressed against the edge of the mounting hole 220, guaranteeing its stability within the hole. The drainage mechanism 5 is filled with filter sand 52, and its bottom surface has permeable holes. The filter sand 52, in conjunction with the permeable holes, facilitates rainwater filtration, preventing soil erosion from the rainwater.

[0043] like Figure 1 and Figure 2As shown, it also includes a filter tray 6. The bottom of the slope body 1 is provided with a drainage ditch 11, which is used to collect water flowing down the slope, facilitating water discharge and use. The top of the drainage ditch 11 is symmetrically provided with limiting grooves 12 on both sides. The filter tray 6 is set on the top of the drainage ditch 11, and the two sides of the filter tray 6 are pressed into the limiting grooves 12. This structure can ensure that the filter tray 6 is stably installed inside the drainage ditch 11.

[0044] like Figure 6 As shown, the filter tray 6 has symmetrical pressing edges 61 on both sides, which are pressed tightly against the inner side of the limiting groove 12 to facilitate the stable installation of the filter tray 6. Furthermore, the filter tray 6 has a sand and gravel pad 62 on its inner side, which prevents large particles of impurities from entering the drainage ditch 11. The filter tray 6 is equipped with multiple gripping rods 63, which facilitate gripping and disassembly of the filter tray 6.

[0045] Working Principle: In use, the placement and length of the anchor rods 3 are first determined based on the geological survey results of the expansive soil slope. Then, the prefabricated lattice beam system 2 is hoisted onto the slope, and the anchor rods 3 are passed through the anchoring holes 223 and anchored to the slope body 1. The anchor rods 3 are then fixed to the bearing sleeves 224 of the lattice beam using pressure caps 34 and gaskets 35, forming an integrated load-bearing structure with the lattice beam. The anchor body of the anchor rod 3 penetrates deep into the stable stratum of the slope, effectively transferring the tensile force of the slope soil to the stable stratum, thus improving the slope's resistance to sliding and overall stability. The inverted T-shaped cross-section design of the lattice beam increases the contact area between the lattice beam and the slope soil, enhancing the constraint effect of the lattice beam on the surface soil of the slope and reducing soil expansion and contraction deformation. The nutrient soil in planting trough 221 provides excellent conditions for vegetation growth. The vegetation roots can penetrate deep into the slope soil, increasing soil cohesion and shear strength, while simultaneously serving to stabilize the slope and restore the ecosystem. Ecological geotextile bags 4 are laid on the slope surface, further enhancing the ecological protection effect of the slope, preventing rainwater from directly eroding the slope soil, and reducing soil erosion. The drainage holes in the drainage mechanism 5 can promptly drain rainwater from planting trough 221, preventing rainwater from seeping into the slope soil. The drainage ditch 11 collects rainwater flowing down the slope body 1 and discharges it into an external ditch through an outlet.

[0046] In summary, compared with existing technologies, this application fully leverages the advantages of both the lattice beam system 2 and the anchor rod 3 through a composite structure. The anchor rod 3 effectively improves the anti-sliding force of the slope soil, while the lattice beam constrains the expansion and contraction deformation of the surface soil. The two work together to significantly improve the stability of expansive soil slopes. The planting trough 221 inside the lattice beam system 2 and the ecological geotextile bags 4 on the slope surface provide a favorable environment for vegetation growth, achieving ecological protection of the slope, which is beneficial for soil and water conservation and ecological restoration, aligning with the concept of green environmental protection. A drainage mechanism 5 is provided at the bottom of the horizontal lattice beam 22. This mechanism effectively drains rainwater from the planting trough 221, reducing the soil moisture content and minimizing the expansion and contraction deformation of the expansive soil, further improving slope stability and preventing water accumulation in the planting trough 221 from causing the expansive soil to expand and loosen. The lattice beams are made of prefabricated components, making construction convenient and quick, reducing on-site construction time and costs, and improving construction efficiency.

[0047] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An ecological protection device for expansive soil slopes composed of a lattice beam and anchor rod, comprising a slope body (1), characterized in that, The slope body (1) is provided with a grid beam system (2), which is formed by multiple horizontal grid beams (22) and vertical grid beams (21) interlaced. The grid beam system (2) is a precast reinforced concrete component. The bottom of the grid beam system (2) is buried on the slope body (1), and the grid beam system (2) and the slope body (1) are fixed by multiple anchor rods (3). The space formed by the horizontal grid beams (22) and vertical grid beams (21) in the grid beam system (2) is set as a planting trough (221). The planting trough (221) is covered with an ecological geotextile bag (4). The horizontal grid beams (22) are aligned with the position of each planting trough (221) and a drainage mechanism (5) is installed.

2. The ecological protection device for expansive soil slopes composed of a lattice beam and anchor bolts as described in claim 1, characterized in that, The slope body (1) is provided with an embedded groove (13), the cross sections of the horizontal grid beam (22) and the vertical grid beam (21) are inverted T-shaped, and the bottom of the horizontal grid beam (22) and the vertical grid beam (21) are embedded in the front insertion groove.

3. The ecological protection device for expansive soil slopes composed of a lattice beam and anchor bolts as described in claim 2, characterized in that, An elastic buffer layer is provided between the lattice beam system (2) and the slope body (1). The elastic buffer layer is made of foamed concrete and covers the contact surface between the lattice beam and the slope.

4. The ecological protection device for expansive soil slopes composed of a lattice beam and anchor bolts as described in claim 1, characterized in that, The horizontal lattice beam (22) is provided with an installation hole (220) aligned with the planting trough (221). A pressure-bearing platform (222) is provided at the intersection of the horizontal lattice beam (22) and the vertical lattice beam (21). An anchoring hole (223) is provided in the middle of the pressure-bearing platform (222). The anchoring hole (223) penetrates the lattice beam system (2). A pressure-bearing sleeve (224) is provided at the top of the anchoring hole (223).

5. The ecological protection device for expansive soil slopes composed of a lattice beam and anchor bolts according to claim 4, characterized in that, The bottom end of the anchor rod (3) is provided with an anchoring joint (31), and the side of the anchoring joint (31) is provided with a plurality of barbs (32), which are inclined upwards and do not affect the anchor rod (3) from passing through the anchoring hole (223).

6. The ecological protection device for expansive soil slopes composed of a lattice beam and anchor bolts according to claim 5, characterized in that, The anchor rod (3) is provided with a screw (33) at the top. One end of the screw (33) that passes through the anchor hole (223) is provided with a pressure cap (34). A gasket (35) is provided between the pressure cap (34) and the pressure plate (222).

7. The ecological protection device for expansive soil slopes composed of a lattice beam and anchor bolts according to claim 1, characterized in that, The planting trough (221) is filled with nutrient soil, and the ecological geotextile bag (4) is filled with improved expanded soil and plant seeds. The adjacent ecological geotextile bags (4) are connected to each other, so that the ecological geotextile bags (4) inside each planting trough (221) form a whole.

8. The ecological protection device for expansive soil slopes composed of a lattice beam and anchor bolts according to claim 1, characterized in that, The drainage mechanism (5) is hollow inside and has an opening at the top. The top edge of the drainage mechanism (5) is provided with a limiting protrusion (51). The drainage mechanism (5) is filled with filter sand (52), and the bottom surface of the drainage mechanism (5) is provided with water-permeable holes.

9. An ecological protection device for expansive soil slopes composed of a lattice beam and anchor bolts according to any one of claims 1-8, characterized in that, It also includes a filter tray (6), the bottom of the slope body (1) is provided with a drainage ditch (11), the top of the drainage ditch (11) is symmetrically provided with limiting grooves (12), the filter tray (6) is set on the top of the drainage ditch (11), and the two sides of the filter tray (6) are pressed into the limiting grooves (12).

10. The ecological protection device for expansive soil slopes composed of a lattice beam and anchor bolts according to claim 9, characterized in that, The filter tray (6) has symmetrical pressing edges (61) on both sides, the pressing edges (61) are pressed against the inner side of the limiting pressing groove (12), and the inner side of the filter tray (6) is provided with a sand and gravel pad layer (62). The filter tray (6) is provided with multiple gripping rods (63).

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