Slope protection structure for relieving water and soil loss of expansive soil and construction method

Abstract

The invention discloses a slope protection structure for relieving water and soil loss of expansive soil and a construction method, and relates to the technical field of slope protection for water and soil loss of expansive soil, the slope protection structure comprises a protection mechanism, the protection mechanism comprises a supporting ring plate assembly, and the supporting ring plate assembly comprises multiple sets of arc-shaped supporting plates and a reinforcement cage assembly; the reinforcement cage assembly comprises a plurality of groups of ring ribs which are uniformly arranged on the outer side of the arc-shaped supporting plate in a sleeving manner; through the designed protection mechanism, permeation pipes are evenly distributed in the upper half area of the outer side of the cement protection barrel, high-pressure pouring of concrete slurry is achieved through a grouting pipe and a slurry outlet hole, the grouting height is controlled in cooperation with a third-stage overflow hole of a second annular plate, it is ensured that no gap exists in the cement protection barrel, and the permeation path of water in the structure is blocked; the cement protection barrel formed through pouring can bear rainstorm impact, the surface soil body of the side slope is effectively protected, the mud loss and the landslide risk are reduced, and the service life is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of slope protection for expansive soil and water loss, and in particular relates to a slope protection structure and a construction method for alleviating expansive soil and water loss. Background Art

[0002] As a special type of soil, expansive soil has significant characteristics of swelling when absorbing water and shrinking when losing water. Its swelling and shrinkage deformation coefficient can reach 0.4-0.8, which makes the slopes very prone to disasters such as surface scour, crack development and deep slippage under conditions such as rainfall infiltration and dry-wet cycles. It is very easy to cause soil erosion and structural instability under rainfall or dry-wet cycles.

[0003] In the existing technology, protective structures (such as concrete slope protection and grass grids) have significant defects: rigid concrete slope protection is difficult to adapt to soil expansion and contraction, and the crack width is often 2 to 5 mm, which causes water to penetrate and accelerate soil softening. Although flexible grass grids allow a certain amount of deformation, they have weak anti-scouring ability (critical flow velocity <1m / s). During heavy rain, the grass peeling rate is as high as 30% to 50%, which can easily lead to dangerous natural disasters such as soil landslides and mudslides. Usually, attempts are made to drain water through built-in drainage pipes (such as PVC corrugated pipes), but the contact surface between the pipe and the soil is easily deformed by soil expansion and compression (breakage rate >60% when the curvature radius is <0.5m), and static drainage cannot match dynamic seepage (the permeability coefficient difference is 10² to 10³ times). At the same time, after the PVC life is damaged, it affects its use and also reduces its service life. To this end, we propose a slope protection structure and construction method for alleviating soil erosion in expansive soil. Summary of the Invention

[0004] The object of the present invention is to provide a slope protection structure and a construction method for alleviating soil erosion in expansive soil, so as to solve the technical problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a slope protection structure for alleviating soil erosion in expansive soil, comprising a protection mechanism, wherein the protection mechanism comprises: A support ring plate assembly, the support ring plate assembly comprising a plurality of groups of arc-shaped support plates; A steel cage assembly, the steel cage assembly comprising a plurality of groups of annular bars uniformly sleeved on the outside of the arc-shaped support plate, and a plurality of groups of longitudinal support bars disposed on the outside of the plurality of groups of annular bars; The outer sides of the longitudinal support bars and the ring bars are poured with concrete and solidified to form a cement protective cylinder; Multiple groups of permeation tubes are evenly arranged between the two groups of annular ribs. The bottom of the permeation tube fits with the outer side of the arc-shaped support plate, and sealing grease is applied at the fitting position. Industrial filter cloth is arranged on the top of the permeation tube.

[0006] Preferably, one end surface of the multiple groups of arc-shaped support plates are provided with a splicing convex plate, and the other end surface is provided with a splicing groove that engages with the splicing convex plate. The upper and lower surfaces of the splicing convex plate are rollingly embedded with multiple groups of sliding balls, and the upper and lower ends of the inner side of the splicing groove are symmetrically provided with sliding grooves that are compatible with the sliding balls.

[0007] Preferably, a pull ring is provided at one end of the arc-shaped support plate, and a cylindrical cavity is formed on the inner side of multiple groups of the arc-shaped support plates. A grouting pipe inserted into the cavity is provided at the bottom of a group of arc-shaped support plates located at the top, and a slurry outlet hole connected to the grouting pipe is provided at the top of one end of the arc-shaped support plate inserted into the slope.

[0008] Preferably, the steel cage assembly further comprises a first annular plate and a second annular plate which are sleeved on the outside of the plurality of groups of arc-shaped support plates.

[0009] Preferably, the bottom, middle and top of both sides of the second annular plate are penetrated by a third overflow hole, a second overflow hole and a first overflow hole respectively, and the third overflow hole, the second overflow hole and the first overflow hole are all equipped with blocking blocks.

[0010] Preferably, a positioning and locking assembly is provided on the outside of the steel cage assembly, and the positioning and locking assembly includes a mounting ring that is slidably sleeved on the outside of multiple groups of longitudinal support ribs.

[0011] Preferably, the positioning and locking assembly further comprises a plurality of sets of hinged seats evenly arranged on one side of the mounting ring, the hinged seats are hinged with steel bar clips, and the outer sides of the plurality of sets of longitudinal support bars are fastened with extrusion rings.

[0012] Preferably, sliding holes adapted to the longitudinal supporting ribs are evenly provided at both ends of the hinge seat.

[0013] Preferably, a baffle is fixedly provided on the inner bottom of the hinge seat, and flow grooves are evenly provided on the inner wall of the mounting ring at positions on both sides of the baffle.

[0014] The present invention also discloses a construction method of a slope protection structure for alleviating soil and water loss in expansive soil, which specifically comprises the following steps: Step 1: Open an upward-sloping grouting hole in the slope that needs to be protected; Step 2: Insert the assembled support ring plate assembly, positioning clamp assembly and steel cage assembly into the grouting hole; Step 3: Connect the grouting pipe to the external high-pressure grouting machine, deliver the concrete slurry to the inner end of the grouting hole, and gradually fill the grouting hole. At the same time, the concrete slurry covers the steel cage assembly; Step 4: The installation ring is pushed to move by the flow of concrete, and the steel bar is squeezed to move and insert into the inside of the slope grouting hole to form a reverse positioning structure; Step 5: As the concrete is continuously poured in, the first concrete that enters flows out from the third overflow hole, the second overflow hole, and the first overflow hole in sequence; Step 6: When the grouting pressure detected by the high-pressure grouting machine increases, stop grouting and wait for the concrete slurry to solidify into a cement protection barrel. When the concrete slurry solidifies, remove the arc support plate by pulling the pull ring. After waiting for the removal of the arc support plate, continue to spray water into the cavity of the cement protection barrel for maintenance, thereby completing the construction of the slope protection structure.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention has a protective mechanism designed in which the infiltration pipes are evenly distributed in the upper half of the outer side of the cement protection barrel, and the top is covered with industrial filter cloth. The high-pressure injection of concrete slurry is achieved through the grouting pipe and the slurry outlet. The grouting height is controlled by the three-level overflow hole of the second annular plate to ensure that there are no gaps inside the cement protection barrel, blocking the penetration path of water inside the structure, improving the overall waterproof performance, and can directionally drain the water inside the expansive soil to avoid the expansion and softening of the soil caused by water retention. The cast cement protection barrel can withstand the impact of heavy rain, effectively protect the surface soil of the slope, reduce the risk of mud loss and landslide, and also improve the service life.

[0016] (2) The present invention uses a designed positioning and locking assembly. The flow of concrete slurry pushes the installation ring to slide along the longitudinal support reinforcement, driving the hinged steel bar to insert into the slope, forming a barbed anchoring structure. The friction coefficient between the steel bar and the soil is much higher than that of the smooth concrete surface, effectively resisting the pulling force generated by the expansion and contraction of the expansive soil, avoiding the overall slippage of the protective structure. Multiple groups of steel bar are evenly distributed along the ring to form a three-dimensional anchoring network, which converts the connection force between the cement protective barrel and the surrounding soil from single-point force to surface contact force, reducing the risk of local stress concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a right side structural schematic diagram of the present invention; Figure 3 It is a structural schematic diagram of the steel cage assembly of the present invention; Figure 4 It is a schematic diagram of the blocking block structure of the present invention; Figure 5 This is a schematic structural diagram of the positioning and locking assembly of the present invention in its initial state; Figure 6 This is a schematic diagram of the structure of the arc-shaped support plate of the present invention; Figure 7 This is a schematic cross-sectional view of the arc-shaped support plate of the present invention; Figure 8 For the present invention Figure 7 A schematic diagram of the enlarged structure of the middle part A; Figure 9 For the present invention Figure 7 A schematic diagram of the enlarged structure of the middle B part; Figure 10 For the present invention Figure 7 The enlarged structural diagram of the middle C part; Figure 11 This is a structural diagram of the cement protection barrel of the present invention; Figure 12 This is a structural schematic diagram of the positioning and locking assembly of the present invention in an expanded state; Figure 13 This is a schematic cross-sectional view of the cement protection barrel of the present invention; Figure 14 For the present invention Figure 13 The enlarged structural diagram of the middle D part; In the figure: 100, support ring plate assembly; 200, positioning clamping assembly; 300, steel cage assembly; 400, cement protection barrel; 101, arc-shaped support plate; 102, pull ring; 103, grouting pipe; 104, splicing protrusion; 105, slurry outlet; 106, sliding ball; 107, splicing groove; 108, slide; 201, mounting ring; 202, hinged seat; 203, steel bar clip; 204, circulation groove; 205, baffle; 206, extrusion ring; 207, sliding hole; 301, first annular plate; 302, longitudinal support rib; 303, penetration pipe; 304, annular rib; 305, second annular plate; 306, blocking block; 307, first overflow hole; 308, second overflow hole; 309, third overflow hole. DETAILED DESCRIPTION

[0018] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example 1 See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 13 and Figure 14The present invention provides a technical solution: a slope protection structure for alleviating soil erosion in expansive soil, including a protection mechanism, the protection mechanism including: The support ring plate assembly 100 includes multiple sets of arc-shaped support plates 101 spliced ​​end to end into a cylindrical structure; The steel cage assembly 300 includes multiple groups of annular ribs 304 uniformly sleeved on the outside of the arc-shaped support plate 101, and multiple groups of longitudinal support ribs 302 are fastened to the outside of the multiple groups of annular ribs 304; Concrete is poured outside the longitudinal support bars 302 and the annular bars 304 and solidified to form a cement protection barrel 400, which is embedded in the interior of the expansive soil slope. Multiple groups of permeable tubes 303 are evenly arranged between the two groups of annular reinforcements 304. The permeable tubes 303 are used to transport excess water inside the expansive soil from the position of the permeable tubes 303 to the interior of the cement protection barrel 400, and then directly discharged to the outside through the cement protection barrel 400. The bottom of the permeable tube 303 is in contact with the outer side of the arc-shaped support plate 101, and the contact position is coated with sealing grease to increase the sealing effect of the contact position, thereby preventing the concrete from entering the interior of the subsequently formed cement protection barrel 400 through the gap at the contact position during concrete pouring, causing leakage. The permeable tubes 303 are evenly distributed in the upper half of the cylinder formed by the multiple groups of arc-shaped support plates 101. The top position height of the permeable tube 303 is higher than the height of the outer side of the first annular plate 301 and the second annular plate 305, and the top of the permeable tube 303 is provided with an industrial filter cloth, which can both block the soil and not affect the water in the soil from entering the interior of the permeable tube 303. The surfaces of the joints of the multiple sets of arc-shaped support plates 101 are all provided with a joint convex plate 104 on one end, and a joint groove 107 is provided on the other end surface to engage with the joint convex plate 104. The upper and lower ends of the joint convex plate 104 are all rollingly embedded with multiple sets of sliding balls 106. The upper and lower ends of the inner side of the joint groove 107 are symmetrically provided with sliding grooves 108 adapted to the sliding balls 106. Sealing grease is applied to the joints of the multiple groups of arc-shaped support plates 101. A pull ring 102 is provided at one end of the arc-shaped support plates 101 close to the outside of the slope. A cylindrical cavity is formed on the inner side of the multiple groups of arc-shaped support plates 101. A grouting pipe 103 inserted into the cavity is provided at the bottom of the group of arc-shaped support plates 101 at the top. A grouting hole 105 communicating with the grouting pipe 103 is provided at the top of the end of the arc-shaped support plate 101 inserted into the slope. The steel cage assembly 300 also includes a first annular plate 301 and a second annular plate 305 that are sleeved on the outside of the multiple sets of arc-shaped support plates 101. The first annular plate 301 is inserted into one end of the slope, and the second annular plate 305 is located at one end outside the slope. The ends of the longitudinal support ribs 302 are respectively fastened to the first annular plate 301 and the second annular plate 305. The bottom, middle and top of both sides of the second annular plate 305 are respectively penetrated by the third overflow hole 309, the second overflow hole 308 and the first overflow hole 307. The third overflow hole 309, the second overflow hole 308 and the first overflow hole 307 are all equipped with blocking blocks 306, which are used to block the third overflow hole 309, the second overflow hole 308 and the first overflow hole 307.

[0020] Example 2 Based on Example 1, please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 、 Figure 11 and Figure 12 A positioning and engaging assembly 200 is provided on the outside of the steel cage assembly 300. The positioning and engaging assembly 200 includes a mounting ring 201 that is slidably mounted on the outside of multiple groups of longitudinal support ribs 302. The longitudinal support ribs 302 pass through the interior of the mounting ring 201, and the mounting ring 201 is located between two groups of annular ribs 304. The positioning and locking assembly 200 further includes a plurality of hinged seats 202 evenly arranged on one side of the mounting ring 201. A steel bar clip 203 is hingedly connected to the hinged seats 202. An extrusion ring 206 is fastened to the outer sides of the plurality of longitudinal support ribs 302. The end of the steel bar clip 203 away from the hinged seat 202 is attached to the outer side of the extrusion ring 206. Sliding holes 207 that match the longitudinal support ribs 302 are evenly provided at both ends of the hinge seat 202. The diameter of the sliding hole 207 is larger than the diameter of the longitudinal support ribs 302. The end of the steel bar clip 203 away from the hinge seat 202 points to the outside of the slope. A baffle 205 is fixedly provided at the bottom inner side of the hinged seat 202. The top surface of the baffle 205 fits the outer side of the arc-shaped support plate 101 and can slide and displace on the outer side of the arc-shaped support plate 101. The inner wall of the mounting ring 201 is evenly provided with flow grooves 204 at positions on both sides of the baffle 205.

[0021] Example 3 Based on Example 2, please refer to Figures 1-9 The present invention also discloses a construction method for a slope protection structure for alleviating soil erosion in expansive soil, which specifically comprises the following steps: Step 1: Open an upwardly inclined grouting hole in the slope to be protected, with the inner bottom of the grouting hole being higher than the outer bottom, and the inner top of the grouting hole being no higher than the top of the permeable tube 303; Step 2: Insert the assembled support ring plate assembly 100, positioning clamp assembly 200 and steel cage assembly 300 into the grouting hole, with one end of the first annular plate 301 facing the inside of the grouting hole; Step 3: Connect the grouting pipe 103 to the external high-pressure grouting machine, deliver the concrete slurry to the inner end of the grouting hole, and gradually fill the grouting hole. At the same time, the concrete slurry covers the steel cage assembly 300; Step 4: The flow of concrete pushes the installation ring 201 to move, and squeezes the steel bar clip 203 to move into the inside of the slope grouting hole to form a reverse positioning structure; Step 5: As concrete is continuously poured in, the first concrete that enters flows out from the third overflow hole 309, and then the third overflow hole 309 is blocked by a set of blocking blocks 306. The concrete slurry level continues to rise, and then flows out from the second overflow hole 308. The second overflow hole 308 is also blocked, and grouting continues, so that the concrete slurry flows out from the first overflow hole 307. At this time, the first overflow hole 307 is blocked and grouting continues; Step 6: When the grouting pressure detected by the high-pressure grouting machine increases, stop grouting and wait for the concrete slurry to solidify into a cement protection barrel 400. When the concrete slurry solidifies for a predetermined time, remove the arc support plate 101 by pulling the pull ring 102. After waiting for the removal of the arc support plate 101, continue to spray water into the cavity of the cement protection barrel 400 for maintenance, thereby completing the construction of the slope protection structure.

[0022] The working principle and use process of the present invention: When the slope protection structure is assembled, firstly, multiple groups of arc-shaped support plates 101 are spliced ​​end to end to form a cylindrical structure; The mounting ring 201, the first annular plate 301, and the second annular plate 305 are respectively sleeved on the outer side of the arc-shaped support plate 101, wherein the first annular plate 301 is located at the end of the arc-shaped support plate 101, the second annular plate 305 is located at the starting end of the arc-shaped support plate 101, and the mounting ring 201 is located close to the first annular plate 301; Multiple groups of longitudinal support ribs 302 are evenly and tightly connected on the side where the first annular plate 301 and the second annular plate 305 are close to each other, and the longitudinal support ribs 302 are suspended between the outer side of the arc-shaped support plate 101. The longitudinal support ribs 302 pass through the sliding holes 207 in sequence to position the mounting ring 201. At this time, the baffle 205 is located directly below the mounting ring 201. At the same time, the annular ribs 304 are evenly sleeved on the outer side of the longitudinal support ribs 302 and tightly connected. The extrusion ring 206 is placed on the outside of the longitudinal support rib 302 and fastened so that the steel bar clip 203 fits the outside of the extrusion ring 206; Multiple groups of permeate tubes 303 are evenly arranged inside the frame formed by the longitudinal support ribs 302 and the annular ribs 304, and are positioned by fastening them to the longitudinal support ribs 302 and the annular ribs 304, with the bottoms of the permeate tubes 303 fitting against the outer sides of the arc-shaped support plate 101. A grouting hole is drilled on the slope to be protected using a drilling machine. The drilling direction is tilted upward so that the inner side of the grouting hole is higher than the outer side. Then, the assembled support ring plate assembly 100, positioning clamping assembly 200, and steel cage assembly 300 are inserted into the grouting hole as a whole, so that one end of the first annular plate 301 faces the inside of the grouting hole and reaches the predetermined position. Then, the grouting pipe 103 is connected to an external high-pressure grouting machine to transport the concrete slurry into the grouting hole. At this time, the concrete slurry flows out from the grouting hole 105 and is transported to the innermost position of the grouting hole. As the concrete slurry is continuously poured in, the slurry inside the grouting hole is continuously displaced outward. When the concrete slurry moves to the position of the installation ring 201, the concrete slurry is blocked by the baffle 205, so that the installation ring 201 is pushed by the concrete slurry to slide on the outside of the longitudinal support rib 302, and drives the steel bar clip 203 to follow the displacement. The steel bar clip 203 is affected by the fulcrum structure formed by the extrusion ring 206, and then continuously tilts upward. At the same time, it is pushed and squeezed by the installation ring 201, so that one end of the steel bar clip 203 is inserted to the outside of the grouting hole, that is, the inside of the slope, forming a reverse positioning structural state, thereby maintaining the position and structural stability of the slope protection structure; As the concrete slurry continues to be poured, when the mounting ring 201 and the steel bar clip 203 are in a stable position, the concrete slurry overflows from the flow groove 204 and continues to flow to the outside of the grouting hole. When the poured concrete slurry flows out from the position of the third overflow hole 309, it indicates that the bottom of the grouting hole is full of slurry, and then the third overflow hole 309 is blocked by the blocking block 306, and the concrete slurry continues to be poured into the grouting hole; When the poured concrete slurry flows out from the second overflow hole 308, it indicates that the middle part of the grouting hole has been filled with slurry, and then the second overflow hole 308 is blocked by the blocking block 306, and the concrete slurry continues to be poured into the grouting hole; When the poured concrete slurry flows out from the first overflow hole 307, it indicates that the top of the grouting hole is already filled with slurry. Then, the first overflow hole 307 is blocked by the blocking block 306, and the concrete slurry is continued to be poured into the grouting hole. The grouting pressure of the high-pressure grouting machine is observed. When the grouting pressure of the high-pressure grouting machine increases, the grouting is stopped, and the concrete slurry is left to solidify. When the concrete slurry has been left to stand for the planned time, the pull ring 102 is connected to the external pulling mechanism, thereby pulling the pull ring 102 to drive the arc-shaped support plates 101 to be disassembled, so that the multiple groups of arc-shaped support plates 101 are disassembled respectively; During the process of splitting the arc-shaped support plates 101, the splicing protrusions 104 slide inside the splicing grooves 107, and the sliding balls 106 roll inside the slide grooves 108, thereby reducing the friction between the two sets of arc-shaped support plates 101, and facilitating the splitting process of the multiple sets of arc-shaped support plates 101; When the concrete slurry solidifies, a cement protection barrel 400 is formed, in which the steel cage assembly 300 and the positioning snap-fit ​​assembly 200 form the skeleton of the cement protection barrel 400. At this time, the top position height of the infiltration tube 303 is higher than the outer surface position height of the cement protection barrel 400. The infiltration tube 303 realizes the communication function between the outer top of the cement protection barrel 400 and the inside of the slope, which is used to transport the excess water inside the expansive soil from the position of the infiltration tube 303 to the inside of the cement protection barrel 400, and then directly discharge it to the outside through the cement protection barrel 400, thereby reducing the loosening of the soil inside the expansive soil slope due to the increase of water, and avoiding the occurrence of accidents such as landslides and mudslides.

[0023] The above embodiments are only used to illustrate the technical method of the present invention and are not intended to limit the present invention. 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 method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A slope protection structure for alleviating soil erosion in expansive soil, characterized in that: A protective mechanism is included, wherein the protective mechanism includes: A support ring plate assembly (100), the support ring plate assembly (100) comprising a plurality of groups of arc-shaped support plates (101); A steel cage assembly (300), the steel cage assembly (300) comprising a plurality of groups of annular ribs (304) uniformly sleeved on the outside of the arc-shaped support plate (101), and a plurality of groups of longitudinal support ribs (302) disposed outside the plurality of groups of annular ribs (304); Concrete is poured outside the longitudinal support ribs (302) and the annular ribs (304) and solidifies to form a cement protection barrel (400); Multiple groups of permeation tubes (303) are evenly arranged between the two groups of annular ribs (304). The bottoms of the permeation tubes (303) are in contact with the outer sides of the arc-shaped support plate (101), and sealing grease is applied to the contacting positions. Industrial filter cloth is provided on the tops of the permeation tubes (303).

2. A slope protection structure for alleviating soil erosion in expansive soil according to claim 1, characterized in that: One end surface of the plurality of groups of arc-shaped support plates (101) is provided with a splicing convex plate (104), and the other end surface is provided with a splicing groove (107) that engages with the splicing convex plate (104). The upper and lower surfaces of the splicing convex plate (104) are rollingly embedded with multiple groups of sliding balls (106), and the upper and lower ends of the inner side of the splicing groove (107) are symmetrically provided with sliding grooves (108) that are compatible with the sliding balls (106).

3. The slope protection structure for alleviating water and soil erosion in expansive soil according to claim 1, characterized in that: A pull ring (102) is provided at one end of the arc-shaped support plate (101), and a cylindrical cavity is formed on the inner side of multiple groups of the arc-shaped support plates (101). A grouting pipe (103) inserted into the cavity is provided at the bottom of a group of arc-shaped support plates (101) at the top, and a grouting hole (105) communicating with the grouting pipe (103) is provided at the top of one end of the arc-shaped support plate (101) inserted into the slope.

4. The slope protection structure for alleviating soil erosion of expansive soil according to claim 1, characterized in that: The steel cage assembly (300) further comprises a first annular plate (301) and a second annular plate (305) sleeved on the outside of the plurality of groups of arc-shaped support plates (101).

5. The slope protection structure for alleviating soil erosion of expansive soil according to claim 4, characterized in that: The bottom, middle and top of both sides of the second annular plate (305) are respectively penetrated by a third overflow hole (309), a second overflow hole (308) and a first overflow hole (307), and the third overflow hole (309), the second overflow hole (308) and the first overflow hole (307) are all equipped with blocking blocks (306).

6. The slope protection structure for alleviating water and soil erosion in expansive soil according to claim 1, characterized in that: A positioning and engaging assembly (200) is provided on the outside of the steel cage assembly (300), and the positioning and engaging assembly (200) comprises a mounting ring (201) slidably sleeved on the outside of multiple groups of longitudinal support ribs (302).

7. The slope protection structure for alleviating water and soil loss in expansive soil according to claim 6, characterized in that: The positioning and locking assembly (200) further comprises a plurality of sets of hinged seats (202) evenly arranged on one side of the mounting ring (201), a steel bar clip (203) being hingedly connected to the hinged seats (202), and an extrusion ring (206) being fastened to the outer sides of the plurality of sets of longitudinal support bars (302).

8. The slope protection structure for alleviating water and soil erosion in expansive soil according to claim 7, characterized in that: Sliding holes (207) that match the longitudinal support ribs (302) are evenly provided at both ends of the hinge seat (202).

9. The slope protection structure for alleviating water and soil loss in expansive soil according to claim 7, characterized in that: A baffle (205) is fixedly provided on the inner bottom of the hinge seat (202), and circulation grooves (204) are evenly provided on the inner wall of the mounting ring (201) at positions on both sides of the baffle (205).

10. A construction method for a slope protection structure for alleviating soil and water loss in expansive soil according to any one of claims 1 to 9, characterized in that: The specific steps include: Step 1: Open an upward-sloping grouting hole in the slope that needs to be protected; Step 2: inserting the assembled support ring plate assembly (100), positioning clamping assembly (200) and steel cage assembly (300) into the grouting hole; Step 3: Connecting the grouting pipe (103) to an external high-pressure grouting machine, delivering concrete slurry to one end of the inner portion of the grouting hole, and gradually filling the grouting hole, while the concrete slurry covers the steel cage assembly (300); Step 4: The installation ring (201) is pushed to move by the flow of concrete, and the steel bar clamping strip (203) is squeezed to move and insert into the inside of the slope grouting hole, thereby forming a reverse positioning structure; Step 5: As the concrete is continuously poured in, the first concrete that enters flows out from the third overflow hole (309), the second overflow hole (308) and the first overflow hole (307) in sequence; Step 6: When the grouting pressure detected by the high-pressure grouting machine increases, the grouting is stopped and the concrete slurry is left to stand and solidify into a cement protection barrel (400). When the concrete slurry solidifies, the arc support plate (101) is removed by pulling the pull ring (102). After the arc support plate (101) is removed, water is continuously sprayed into the cavity of the cement protection barrel (400) for maintenance, thereby completing the construction of the slope protection structure.

Images