High and steep slope ecological restoration method based on geological safety

Abstract

The invention relates to a high and steep slope ecological restoration method based on geological safety, which comprises the following steps: trimming the surface of a target slope into a stepped platform structure, and uniformly forming planting holes along the longitudinal direction of the platform; paving a gravel permeable layer at the bottom of the hole, and filling the planting hole with a plant growth base material; trees are planted in the foundation pit, and the foundation pit is filled with soil; a supporting device is installed on the base of the trunk, the supporting device is adjusted to be stably connected with the trunk, and the supporting device is connected with a slope and implanted into a rock-soil layer. When planted trees incline, the connecting parts incline synchronously, the linkage assemblies and the movable rods which are connected with the connecting parts can be affected by the connecting parts, at the moment, the movable rods are driven to jack upwards under the action of the linkage assemblies, upward supporting force is provided for the supporting rods through the movable rods, downward pressure is buffered when the tree trunks incline, and therefore the tree trunks are prevented from being damaged. Therefore, the trees are not prone to toppling over, namely, when the trees are inclined, the inclination trend of the trees can be buffered through the counter-acting force in the inclination direction of the trees.

Description

Technical Field

[0001] The invention relates to the technical field of slope ecological restoration, and in particular to a method for ecological restoration of high and steep slopes based on geological safety. Background Art

[0002] Rocky soil mountainous areas are affected by topography, geological conditions and climatic conditions, especially the regional extreme continuous heavy rainfall, forming a large number of exposed soil or stone steep slopes, accompanied by a large amount of soil and water loss, which brings serious harm to the surrounding environment. It is easy to form unstable rock and soil on the steep slopes, which is easy to cause slope instability due to falling or collapse and landslide damage, posing a serious threat to the slope below. Therefore, it is necessary to carry out ecological restoration of steep slopes to effectively improve the ecological environment of the damaged slopes and avoid the geological disasters and environmental problems caused by them.

[0003] In the process of ecological restoration of high and steep slopes, when transplanting trees, the slopes are inclined and the tree roots have not yet grown deep into the soil. Therefore, they are easily tilted or even toppled by external factors (such as wind and rainy weather) during their growth. In view of this situation, anti-toppling devices are often installed around the trees in the early stage of tree planting to facilitate better growth of the trees.

[0004] Existing anti-dumping devices generally use ropes to tie several poles to the tree trunk for support. However, after being used for a period of time, the ropes are easy to loosen. In the case of strong winds, the tree will still fall over, and the anti-dumping effect is not ideal. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide an ecological restoration method for high and steep slopes based on geological safety, so as to solve the problem that the existing anti-dumping devices generally use ropes to tie several poles to the tree trunks for support, but after a period of use, the ropes are easy to loosen. In the case of strong winds, the trees will still fall, and the anti-dumping effect is not ideal.

[0006] The present invention is achieved through the following technical solutions:

[0007] A method for ecological restoration of high and steep slopes based on geological safety, comprising the following steps:

[0008] Step 1: Clean the target slope surface and trim it into a stepped platform structure, and evenly open planting holes along the longitudinal direction of the platform;

[0009] Step 2: Lay a permeable layer of crushed stone at the bottom of the hole and fill the planting hole with plant growth substrate;

[0010] Step 3: Plant the tree in the foundation pit and fill the pit with soil so that the soil covers the tree roots and the lower end of the trunk;

[0011] Step 4: Install the support device at the base of the tree trunk, adjust the support device to be firmly connected to the tree trunk, connect the support device to the slope surface and implant it into the rock and soil layer;

[0012] Step 5: A U-shaped diversion groove is set at the edge of the stepped platform, and seepage holes are set at intervals in the groove, which are connected to the longitudinal drainage pipe on the slope;

[0013] The support device includes a connecting part connected to the tree trunk and a supporting part connected to the slope surface, the supporting part includes a base installed on the slope surface and at least a pair of supporting units arranged on both sides of the base, the supporting unit includes a supporting rod, a movable rod, a cylinder and a linkage assembly, the two ends of the support rod are respectively connected to the connecting part and the linkage assembly, the upper end of the movable rod is connected to the linkage assembly, and the lower end is provided with a sealing block slidably connected to the inner cavity of the cylinder, the movable rod is driven by the linkage assembly to slide along the longitudinal direction of the cylinder, the bottom surface of the cylinder is connected to the top surface of the base, and the base is hollow and communicated with the cylinder.

[0014] It is further defined that the linkage assembly includes a first gear, a first rack portion and a second rack portion, the first rack portion is located on a side of the support rod facing the base, the second rack portion is located on a side of the movable rod away from the trunk, the first rack portion and the second rack portion are respectively meshed with two sides of the first gear, and the first gear is rotatably connected to the top surface of the cylinder.

[0015] It is further defined that the top surface of the support rod is provided with a slide groove penetrating through the bottom surface thereof, the side wall of the slide groove is provided with a guide groove, a guide block is slidably fitted in the guide groove, and the guide block is connected to the side wall of the second rack portion.

[0016] It is further defined that the connecting portion includes a sleeve sleeved outside the trunk and two clamping members arranged opposite to each other, the clamping members include a clamping plate and an elastic supporting member located between the clamping plate and the sleeve, and the two ends of the elastic supporting member are respectively connected to the clamping plate and the sleeve.

[0017] It is further defined that the inner wall of the sleeve is provided with a plug hole extending in the diameter direction thereof, the bottom surface of the plug hole is provided with a slot extending obliquely in a direction away from the clamping plate, a plurality of slots are provided and arranged in the extension direction of the plug hole, a plug rod is provided on a side of the clamping plate close to the plug hole, and the plug rod extends in the length direction of the slot;

[0018] The elastic support members are provided with two pieces one above the other, and the insertion rod is located between the two elastic support members.

[0019] It is further defined that the base includes a fixed seat and a rotating seat with a hollow interior, the rotating seat is located on the top surface of the fixed seat and the two are rotatably connected.

[0020] It is further defined that a gap is formed between the fixed seat and the rotating seat, a ring body connected to the top surface of the fixed seat is provided in the gap, the outer wall of the ring body is provided with a plurality of gear teeth evenly distributed along its circumferential direction, a second gear is meshed on the gear teeth, the second gear is rotatably installed on the rotating seat, and a motor connected to the second gear is also provided on the rotating seat.

[0021] It is further defined that the plant growth substrate in step 2 includes: 40-60% local soil, 20-30% organic fertilizer, 5-10% water retaining agent, and 2-5% microbial agent.

[0022] It is further specified that the microbial agent comprises nitrogen-fixing bacteria, phosphate-solubilizing bacteria and arbuscular mycorrhizal fungi, and the colony count ratio of the three is 1:0.8:1.2.

[0023] It is further defined that the water retaining agent includes polyacrylamide and bentonite, and the mass ratio thereof is 3:1-5:1.

[0024] The beneficial effects of the present invention are:

[0025] When the planted tree tilts, the connecting part tilts synchronously, and the linkage assembly and the movable rod connected thereto are both affected. At this time, the movable rod is driven upward under the action of the linkage assembly, so that the support rod is provided with an upward supporting force through the movable rod, so that the downward pressure when the trunk tilts is buffered, thereby making the tree less likely to fall over. That is, when the tree is tilted, the reaction force in the tilting direction of the tree can buffer the tilting tendency of the tree.

[0026] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the connecting portion of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the support unit of the present invention;

[0030] Figure 4 It is a structural schematic diagram of the base of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of the rotating seat of the present invention when it is disassembled.

[0032] In the figure:

[0033] 1. Base; 101. Fixed seat; 102. Rotating seat; 2. Support rod; 3. Movable rod; 301. Sealing block; 4. Cylinder; 5. First gear; 501. First rack portion; 502. Second rack portion; 6. Slide groove; 601. Guide groove; 7. Sleeve; 8. Clamping plate; 9. Elastic support member; 10. Socket; 1001. Slot; 11. Insert rod; 12. Gear teeth; 13. Second gear; 14. Motor. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition and explanation in the subsequent drawings.

[0037] In the above description of the present invention, it should be noted that the terms "one side", "the other side", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0038] In addition, the term "same" does not mean that the parts must be absolutely the same, but slight differences are allowed. The term "vertical" only means that the positional relationship between the parts is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0039] See also Figure 1-5 The present invention provides a technical solution: a method for ecological restoration of steep slopes based on geological safety, comprising the following steps:

[0040] Step 1: Clean the target slope surface and trim it into a stepped platform structure, and evenly open planting holes along the longitudinal direction of the platform;

[0041] Step 2: Lay a permeable layer of crushed stone at the bottom of the hole and fill the planting hole with plant growth substrate;

[0042] Step 3: Plant the tree in the foundation pit and fill the pit with soil so that the soil covers the tree roots and the lower end of the trunk;

[0043] Step 4: Install the support device at the base of the tree trunk, adjust the support device to be firmly connected to the tree trunk, connect the support device to the slope surface and implant it into the rock and soil layer;

[0044] Step 5: A U-shaped diversion groove is set at the edge of the stepped platform, and seepage holes are set at intervals in the groove, which are connected to the longitudinal drainage pipe on the slope;

[0045] The supporting device includes a connecting portion connected to the trunk and a supporting portion connected to the slope, the supporting portion includes a base 1 installed on the slope and at least a pair of supporting units arranged on both sides of the base 1, the supporting unit includes a supporting rod 2, a movable rod 3, a cylinder 4 and a linkage assembly, the two ends of the supporting rod 2 are respectively connected to the connecting portion and the linkage assembly, the upper end of the movable rod 3 is connected to the linkage assembly, and the lower end is provided with a sealing block 301 slidably connected to the inner cavity of the cylinder 4, the movable rod 3 is driven by the linkage assembly to slide along the longitudinal direction of the cylinder 4, the bottom surface of the cylinder 4 is connected to the top surface of the base 1, and the base 1 is hollow and connected to the cylinder 4.

[0046] Among them, in step one, the width of the stepped platform is 0.5-1.2m, and the height difference between adjacent platforms is 0.8-1.5m; planting holes are opened along the longitudinal direction of the platform at intervals of 1.5-2.5m, and the depth of the planting holes is 50-80cm.

[0047] In step 2, the crushed stone permeable layer has a thickness of 10-15 cm.

[0048] In this solution, since the base 1 is hollow and the two cylinders 4 are connected thereto, the base 1 and the two cylinders 4 form a storage chamber for storing fluid, and a valve structure for inputting or outputting fluid into or out of the storage chamber is also provided on the base 1. Since the two cylinders 4 are both provided with sealing blocks 301, the storage chamber can be made into a sealed space by closing the valve structure under the cooperation of the valve structure and the two sealing blocks 301.

[0049] When used specifically, after the tree is planted in the foundation pit, it is connected to the trunk through the connection part, and the support unit is connected to the slope surface, so as to complete the support of the tree through the support device. During the support process, if the tree tilts, the connection part connected to it will be synchronously tilted at the angle of the tree tilt. Since two support rods 2 are arranged on opposite sides of the connection part, when the connection part tilts, one of the support rods 2 will bear the downward pressure when the trunk tilts. At the same time, the linkage assembly and the movable rod 3 connected to it will be affected by it. At this time, under the action of the linkage assembly, the movable rod 3 is driven to push up, so as to provide an upward supporting force to the support rod 2 through the movable rod 3, so that it can buffer the downward pressure when the trunk tilts, so that the tree is not easy to tilt.

[0050] Among them, the base 1 can be a detachable structure, which can be split into two parts, left and right, to facilitate loading and unloading during use. At the same time, a sealing gasket and a sealing groove can be respectively set between the left and right parts of the structure. The sealing gasket and the sealing groove are interference fit, so that after the left and right parts of the structure are spliced ​​into the base 1, the sealing of the storage chamber is guaranteed.

[0051] By setting up the storage chamber, when the support rod 2 is pressed downward by the tilted tree, since the movable rod 3 is connected to the support rod 2 through the linkage assembly, the movable rod 3 will also be affected by the downward pressure of the tree. The storage chamber is sealed so that it can provide partial buffering force to the movable rod 3, further improving the supporting effect of the support unit.

[0052] In this embodiment, the linkage assembly includes a first gear 5, a first rack portion 501 and a second rack portion 502. The first rack portion 501 is located on the side of the support rod 2 facing the base 1, and the second rack portion 502 is located on the side of the movable rod 3 away from the trunk. The first rack portion 501 and the second rack portion 502 are respectively meshed with the two sides of the first gear 5, and the first gear 5 is rotatably connected to the top surface of the cylinder 4.

[0053] In this solution, when the tree tilts, the support rod 2 facing away from the tilting direction is subjected to a pulling force, so that the support rod 2 moves toward the tilting direction of the tree. Since the first rack portion 501 connected thereto is meshed with the first gear 5, the first gear 5 rotates. Through the rotation of the first gear 5, the second rack portion 502 meshed therewith moves downward. Since the second rack portion 502 is connected to the movable rod 3, the movable rod 3 slides downward in the cylinder 4, and one end of the storage cavity is squeezed through the sealing block 301, so that the pressure at the other end of the storage cavity increases.

[0054] When the pressure at the other end of the storage chamber increases, the sealing block 301 and the movable rod 3 in the cylinder 4 on this end are pushed upward due to the pressure. When the movable rod 3 moves upward, the second rack portion 502 connected thereto drives the first gear 5 meshing therewith to rotate, thereby driving the first rack portion 501 meshing therewith and the support rod 2 to be lifted in the opposite direction of the tree's inclination through the first gear 5, thereby supporting the tree. When the tree is tilted, the reaction force in the direction of the tree's inclination can buffer the tilting tendency of the tree.

[0055] In this embodiment, the top surface of the support rod 2 is provided with a slide groove 6 that passes through its bottom surface, and the side wall of the slide groove 6 is provided with a guide groove 601. A guide block is slidably fitted in the guide groove 601, and the guide block is connected to the side wall of the second rack part 502.

[0056] In this solution, the sliding track of the support rod 2 is limited by the cooperation of the slide groove 6 and the guide block, and the second rack portion 502 and the support rod 2 are not easily separated from the meshing state with the first gear 5.

[0057] In this embodiment, the connecting part includes a sleeve 7 that is sleeved outside the trunk and two clamping members that are arranged opposite to each other. The clamping members include a clamping plate 8 and an elastic supporting member 9 located between the clamping plate 8 and the sleeve 7. The two ends of the elastic supporting member 9 are respectively connected to the clamping plate 8 and the sleeve 7.

[0058] In this solution, the sleeve 7 and the base 1 can be disassembled into two left and right parts, so as to facilitate assembly and disassembly during use.

[0059] During installation, the two elastic support members 9 stretch naturally to push the two clamping plates 8 to move in a relatively close direction. Therefore, during installation, the two clamping plates 8 are respectively installed on both sides of the trunk. Under the action of the two elastic support members 9, the trunk is clamped by the two clamping plates 8 to complete the installation of the connection part. As the tree grows, the trunk becomes thicker and can also adapt to the elastic action of the elastic support members 9.

[0060] In this embodiment, the inner wall of the sleeve 7 is provided with a plug hole 10 extending along the diameter direction thereof, the bottom surface of the plug hole 10 is provided with a slot 1001 extending obliquely in a direction away from the clamping plate 8, a plurality of slots 1001 are provided and arranged along the extension direction of the plug hole 10, and a plug rod 11 is provided on one side of the clamping plate 8 close to the plug hole 10, and the plug rod 11 extends along the length direction of the slot 1001;

[0061] The elastic support members 9 are provided with two each, and the insertion rod 11 is located between the two elastic support members 9 .

[0062] In the present solution, each clamping plate 8 is supported by two upper and lower elastic support members 9, so that the clamping plate 8 has two fulcrums when supported. When the tree tilts, the elastic support member 9 located at the top will be subjected to greater pressure than the elastic support member 9 located at the bottom, causing the clamping plate 8 to tilt. At this time, the extension length of the elastic support member 9 located at the top is shorter than the extension length of the elastic support member 9 located at the bottom. At the same time, due to the tilting of the clamping plate 8, the plug rod 11 connected thereto tilts downward synchronously, and as the trunk tilts, the clamping plate 8 is squeezed to displace it. Therefore, when the plug rod 11 tilts downward, it displaces, so that the plug rod 11 is inserted into the slot 1001 and abuts against it. At this time, the clamping plate 8 and the sleeve 7 are rigidly connected through the plug rod 11 under the pressure of the tilting tree, so that the connecting part can tilt synchronously with the tree.

[0063] In this embodiment, the base 1 includes a fixed seat 101 and a rotating seat 102 with a hollow interior. The rotating seat is located on the top surface of the fixed seat 101 and the two are rotatably connected.

[0064] In this solution, the rotating seat 102 is connected to the supporting unit, the fixed seat 101 is connected to the slope surface, and nails can be set on the bottom surface of the fixed seat 101 to facilitate fixing with the rock and soil layer.

[0065] The interior of the rotating seat 102 is hollow.

[0066] In this embodiment, a gap is formed between the fixed seat 101 and the rotating seat 102, and a ring body connected to the top surface of the fixed seat 101 is provided in the gap. The outer wall of the ring body is provided with a plurality of gear teeth 12 evenly distributed along its circumferential direction, and a second gear 13 is meshed on the gear teeth 12. The second gear 13 is rotatably installed on the rotating seat 102, and a motor 14 connected to the second gear 13 is also provided on the rotating seat 102.

[0067] In this solution, the second gear 13 is driven to rotate by the motor 14. Since the second gear 13 is in meshing state with the ring body through multiple gear teeth 12, the second gear 13 rotates around the ring body. Since the second gear 13 is connected to the rotating seat 102, the rotating seat 102 is driven to rotate on the fixed seat 101, so that the support position of the support unit can be adjusted by rotating the rotating seat 102.

[0068] In this embodiment, the plant growth substrate in step 2 includes: 40-60% local soil, 20-30% organic fertilizer, 5-10% water retaining agent, and 2-5% microbial agent.

[0069] In this scheme, the risk of biological invasion caused by foreign soil is avoided by retaining the local soil microbial community and mineral components. A proportion of >40% can maintain the mechanical compatibility between the substrate and the original slope soil and prevent interface slip;

[0070] Mixing organic fertilizer with local soil creates a porosity of 18-25%, taking into account both air permeability and water retention. At the same time, the proportion of organic fertilizer is less than 30% to avoid the risk of root burn, while providing the nitrogen, phosphorus and potassium needed by trees in the early stages of growth;

[0071] When the amount of water retaining agent added is greater than 5%, the nutrient loss of the substrate in the 45° slope scour test is reduced by 40-60%, and the substrate can hold water up to 200-300 times its own weight in the dry season, extending the water supply cycle by 5-7 days;

[0072] Microbial agents produce antibacterial substances to inhibit soil-borne diseases such as damping-off. After the bacterial community is colonized, the effective nutrients in the rhizosphere can be increased by 2-3 times.

[0073] Through the above-mentioned ratio, it can adapt to the area with annual rainfall of 400-1200mm, acidic to weakly alkaline soil with pH value of 5.5-8.5, and soil / rock slope with slope of 25°-55°.

[0074] The specific experimental data are as follows:

[0075] Comparison group Tree survival rate (1 year) <![CDATA[Erosion volume of slope (t / m 2 ·year)]]> Remark Traditional Hakka soil recipe 58.2％ 2.35 Local landslide Pure organic fertilizer matrix 42.7％ 3.12 Serious substrate loss during the rainy season This program 86.5％ 0.89 The root system is 1.2-1.8m deep

[0076] In this embodiment, the microbial agent comprises nitrogen-fixing bacteria, phosphate-solubilizing bacteria and arbuscular mycorrhizal fungi, and the colony count ratio of the three is 1:0.8:1.2.

[0077] In this scheme, nitrogen-fixing bacteria convert nitrogen in the air into ammonium nitrogen that can be absorbed by plants, reducing the amount of nitrogen fertilizer applied;

[0078] Phosphate-solubilizing bacteria decompose insoluble phosphorus in the soil, release effective phosphorus, and secrete organic acids to dissolve insoluble phosphorus such as Ca-P and Fe-P, increasing the effective phosphorus content by 2-3 times;

[0079] The arbuscular mycorrhizal fungi can expand the root absorption range, enhance stress resistance, and improve water absorption efficiency. In this way, the ratio of fungi can be used to precisely control the interaction between microorganisms to achieve the synergistic effect of "nitrogen fixation, phosphorus release, and root expansion".

[0080] The specific experimental data are as follows:

[0081] Control group (colony ratio) Root biomass (g / plant) Soil available nitrogen (mg / kg) Mycorrhizal colonization rate (%) 1:1:1 (normal ratio) 58.3 24.7 62.5 1:0.8:1.2 (this solution) 82.6 31.9 88.4 0.5:1:1.5 (imbalance ratio) 47.1 18.2 51.3

[0082] Note: The test conditions are sandy slope soil with a pH of 7.2 and a test period of 120 days.

[0083] In this embodiment, the water retaining agent includes polyacrylamide and bentonite, and the mass ratio thereof is 3:1-5:1.

[0084] In this scheme, the PAM molecular chains in polyacrylamide (PAM) are rapidly stretched to form a hydrogel grid, which increases the water absorption in a short period of time to enhance the instantaneous water absorption capacity;

[0085] The bentonite interlayer structure absorbs bound water and gradually releases it under drought conditions, thus prolonging the water slow-release period.

[0086] The specific experimental data are as follows:

[0087] Ratio (PAM: bentonite) Water holding capacity (g / g) Water release cycle (days) Compressive strength(kPa) Nutrient loss rate (%) 2:1 450 5-7 18 12 3:1 420 7-9 28 8 4:1 400 8-10 32 6 5:1 380 9-11 25 9 Pure PAM 500 4-6 5 22

[0088] Note: The test conditions are pH 7.0, sandy slope with a slope of 45°, and rainfall simulation intensity of 30 mm / h.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A method for ecological restoration of high and steep slopes based on geological safety, characterized by: The steps include: Step 1: Clean the target slope surface and trim it into a stepped platform structure, and evenly open planting holes along the longitudinal direction of the platform; Step 2: Lay a permeable layer of crushed stone at the bottom of the hole and fill the planting hole with plant growth substrate; Step 3: Plant the tree in the foundation pit and fill the pit with soil so that the soil covers the tree roots and the lower end of the trunk; Step 4: Install the support device at the base of the tree trunk, adjust the support device to be firmly connected to the tree trunk, connect the support device to the slope surface and implant it into the rock and soil layer; Step 5: A U-shaped diversion groove is set at the edge of the stepped platform, and seepage holes are set at intervals in the groove, which are connected to the longitudinal drainage pipe on the slope; The support device comprises a connecting portion connected to a tree trunk and a supporting portion connected to a slope surface, the supporting portion comprises a base (1) mounted on the slope surface and at least one pair of supporting units arranged on both sides of the base (1) opposite to each other, the supporting unit comprises a supporting rod (2), a movable rod (3), a cylinder (4) and a linkage assembly, the two ends of the supporting rod (2) are respectively connected to the connecting portion and the linkage assembly, the upper end of the movable rod (3) is connected to the linkage assembly, and the lower end is provided with a sealing block (301) slidably connected to the inner cavity of the cylinder (4), the movable rod (3) is driven by the linkage assembly to slide along the longitudinal direction of the cylinder (4), the bottom surface of the cylinder (4) is connected to the top surface of the base (1), and the base (1) is hollow and communicates with the cylinder (4).

2. The method for ecological restoration of steep slopes based on geological safety according to claim 1 is characterized by: The linkage assembly comprises a first gear (5), a first rack portion (501) and a second rack portion (502); the first rack portion (501) is located on a side of the support rod (2) facing the base (1); the second rack portion (502) is located on a side of the movable rod (3) away from the tree trunk; the first rack portion (501) and the second rack portion (502) are respectively meshed with two sides of the first gear (5); and the first gear (5) is rotatably connected to the top surface of the cylinder (4).

3. The method for ecological restoration of steep slopes based on geological safety according to claim 2 is characterized by: The top surface of the support rod (2) is provided with a slide groove (6) penetrating through the bottom surface thereof, the side wall of the slide groove (6) is provided with a guide groove (601), a guide block is slidably fitted in the guide groove (601), and the guide block is connected to the side wall of the second rack portion (502).

4. The method for ecological restoration of steep slopes based on geological safety according to claim 1 is characterized by: The connecting portion comprises a sleeve (7) sleeved outside the tree trunk and two clamping members arranged opposite to each other, the clamping members comprising a clamping plate (8) and an elastic supporting member (9) located between the clamping plate (8) and the sleeve (7), and the two ends of the elastic supporting member (9) are respectively connected to the clamping plate (8) and the sleeve (7).

5. The method for ecological restoration of steep slopes based on geological safety according to claim 4 is characterized by: The inner wall of the sleeve (7) is provided with an insertion hole (10) extending in the diameter direction thereof, the bottom surface of the insertion hole (10) is provided with a slot (1001) extending obliquely in a direction away from the clamping plate (8), a plurality of the slots (1001) are provided and arranged in the extension direction of the insertion hole (10), and a plug rod (11) is provided on a side of the clamping plate (8) close to the insertion hole (10), and the plug rod (11) extends in the length direction of the slot (1001); The elastic support members (9) are provided with two pieces at the top and the bottom, and the insertion rod (11) is located between the two elastic support members (9).

6. The method for ecological restoration of steep slopes based on geological safety according to claim 1 is characterized by: The base (1) comprises a fixed seat (101) and a rotating seat (102) with a hollow interior, wherein the rotating seat is located on the top surface of the fixed seat (101) and the two are rotatably connected.

7. The method for ecological restoration of steep slopes based on geological safety according to claim 6 is characterized by: A gap is formed between the fixed seat (101) and the rotating seat (102), and a ring body connected to the top surface of the fixed seat (101) is arranged in the gap. The outer wall of the ring body is provided with a plurality of gear teeth (12) evenly distributed along its circumferential direction, and a second gear (13) is meshed on the gear teeth (12). The second gear (13) is rotatably mounted on the rotating seat (102), and a motor (14) connected to the second gear (13) is also arranged on the rotating seat (102).

8. The method for ecological restoration of steep slopes based on geological safety according to claim 1 is characterized by: The plant growth substrate in step 2 comprises: 40-60% local soil, 20-30% organic fertilizer, 5-10% water retaining agent, and 2-5% microbial agent.

9. The method for ecological restoration of steep slopes based on geological safety according to claim 8 is characterized by: The microbial agent comprises nitrogen-fixing bacteria, phosphate-solubilizing bacteria and arbuscular mycorrhizal fungi, and the colony count ratio of the three is 1:0.8:1.

2.

10. The method for ecological restoration of steep slopes based on geological safety according to claim 8, characterized in that: The water retaining agent comprises polyacrylamide and bentonite, and the mass ratio thereof is 3:1-5:1.

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