Anti-scour system for rock slopes with upper soil cover and lower rock slope in cold and arid areas

Abstract

The present invention relates to the field of slope protection technology, and more specifically, to a system for preventing scour of rock slopes below the upper soil cover layer in cold and arid regions. The system comprises a plurality of drainage pipes, one end of which penetrates a precast concrete slab and penetrates into the soil of the slope, and an interconnecting pipe arranged in the soil of the slope; wherein the drainage ends of the drainage pipes are arranged to be tilted downward; the tops of the drainage pipes are penetrated by a plurality of through holes for allowing moisture from the soil of the slope to flow into the drainage pipes, and a push plate is slidably arranged inside the drainage pipes; in the system for preventing scour of rock slopes below the upper soil cover layer in cold and arid regions, when the drainage pipes are clogged, the water flow inside the drainage pipes is collected through the interconnecting pipes, forcing the driving assembly inside the interconnecting pipes to move, thereby enabling the push plate to slide inside the drainage pipes, and utilizing the sliding force to push away the multiple blockages in the drainage pipes, thereby reducing the congestion in the drainage pipes and improving the drainage efficiency of the soil of the slopes.

Description

Technical Field

[0001] The invention relates to the technical field of slope protection, in particular to an anti-scouring system for a rock slope with an upper soil cover layer and a lower rock cover layer in cold and arid areas. Background Art

[0002] Some soil overburden, such as aeolian silt, is loose, porous, has low shear strength, and is moderately compressible. Landslides can be caused by factors such as settlement, earthquake subsidence, frost heave damage, weathering and erosion, and water erosion. Rock is a sedimentary rock with relatively high integrity and hardness in its natural state. However, it softens and argillaceously forms weak interlayers when exposed to water. These interlayers are susceptible to rain and wind erosion, reducing their strength and making them less resistant to erosion and erosion. Furthermore, the primary cause of landslides in cold and arid regions is frost heave and thaw of slope soil, especially in spring when temperatures rise and the soil thaws.

[0003] At present, the engineering classification of soil is very mature, and the protection system for soil slopes is also very mature. The commonly used soil slope protection is plant protection (grass protection, dwarf shrub protection, mixed grass and wood protection), masonry protection (cover protection, stone facing wall, mortar masonry, concrete precast block protection), comprehensive protection (grass planting in hollow concrete grids, grass planting in hollow precast blocks, geosynthetics combined with plant protection, etc.).

[0004] During the slope protection process, in order to remove the water accumulated in the slope soil and prevent the accumulation of water due to freezing and thawing, which will cause the shear strength of the slope soil to drop significantly and cause landslides, drainage pipes are currently laid out within the spray protection range of each level of the slope, and the water accumulated in the slope soil can be discharged through the drainage pipes. In the related art, the Chinese patent with publication number CN107142923A also discloses a drainage pipe, which includes an outer pipe, an inner pipe is provided inside the outer pipe, the inner pipe is movably connected to the outer pipe, the inner pipe can be pulled out from the outer pipe, and a shovel is provided at the end of the inner pipe, which is fixedly connected to the inner pipe. The drainage pipe of this patent can discharge underground seepage water from soil layers such as water-containing sand and fully weathered granite above the slope protection and retaining wall, and can also discharge concentrated spring water above the slope protection and retaining wall that is inconvenient to remove, thereby effectively reducing the underground water level of soil layers such as water-containing sand and fully weathered granite above the slope protection and retaining wall, and enhancing the mechanical properties of the slope soil.

[0005] However, when soil from the slope enters the drain pipe through the holes, or due to external factors, such as animals placing obstacles in the drain pipe, the drain pipe needs to be cleaned. Currently, drain pipes are mostly cleaned manually. However, current drain pipes lack cleaning mechanisms. If the drainage system becomes clogged before the cleaning cycle is complete, the drainage efficiency of the slope soil will still be affected. Summary of the Invention

[0006] The purpose of the present invention is to provide an anti-scour system for rock slopes with an upper soil cover layer and a lower rock cover layer in cold and arid areas, so as to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, a scour prevention system for rock slopes below the upper soil cover layer in cold and arid areas is provided, comprising concrete grid beams staggered and embedded in the slope surface, precast concrete slabs arranged in the concrete grid beams, the precast concrete slabs and the concrete grid beams together forming a grid beam slope protection, and drainage ditches for collecting water from the slope surface are arranged between each level of the grid beam slope protection; the system also comprises a plurality of drainage pipes, one end of which passes through the precast concrete slab and penetrates into the slope soil, and interconnecting pipes arranged in the slope soil; wherein the drainage ends of the drainage pipes are arranged downwardly inclined; the top of the drainage pipes is penetrated by a plurality of through holes for allowing water from the slope soil to flow into the drainage pipes, and a push plate is slidably arranged inside; the outer ring of the push plate has a water channel for water to flow through; wherein:

[0008] One end of each of the plurality of longitudinally arranged drainage pipes is connected to an interconnecting pipe. A liquid storage cavity is provided inside the interconnecting pipe between two adjacent drainage pipes. When the drainage pipe is blocked, the water inside the drainage pipe flows into the liquid storage cavity through the water trough.

[0009] The bottom of the liquid storage chamber has a drainage component and a driving component inside; the drainage component discharges the water when the water in the liquid storage chamber reaches a preset height; the driving component uses the height of the water level in the liquid storage chamber to adjust the position of the push plate in the drain pipe, so that the push plate can push away the blockage in the drain pipe during the process of adjusting the position.

[0010] As a further improvement of this technical solution, a water stop plate is fixedly installed inside the interconnecting pipe between two adjacent drainage pipes, and a partition plate is fixedly installed below the connection point between the interconnecting pipe and the drainage pipe. The partition plate and the water stop plate separate the interior of the interconnecting pipe into a liquid storage chamber.

[0011] As a further improvement of the present technical solution, a drip hole is provided through the top of the partition. When the drain pipe is clogged, the water in the interconnecting pipe flows into the liquid storage cavity through the drip hole.

[0012] A drainage hole is provided on the top of the water stop plate, and the drainage hole is communicated with the drainage assembly.

[0013] As a further improvement of the present technical solution, the driving assembly includes a float arranged in the liquid storage chamber, and a connecting rope connecting the float and the push plate; the weight of the float is greater than the weight of the push plate.

[0014] As a further improvement of the present technical solution, the drainage assembly includes an outer tube and an inner tube fixedly arranged on the top of the water stop plate; wherein:

[0015] The top of the outer tube is a closed structure, and a gap for water flow is left between the bottom end of the outer tube and the top of the water stop plate;

[0016] The bottom of the inner tube is connected to the drainage hole;

[0017] A water absorption cavity is formed between the inner ring of the outer tube and the outer ring of the inner tube, and the top height of the inner tube is lower than the top height of the outer tube.

[0018] As a further improvement of the present technical solution, the drainage assembly includes a water baffle plate provided on the top of the water stop plate, and a sliding column fixedly provided on the top of the water stop plate, the sliding column slidingly passing through the water baffle plate, and a connecting spring elastically connecting the top of the sliding column and the top of the water baffle plate is provided between the top of the sliding column and the top of the water stop plate;

[0019] A pull rope connecting the bottom of the float and the top of the water baffle is provided between the two. When the float moves up to the bottom of the baffle, the pull rope switches from a loose state to a tight state to pull the water baffle up.

[0020] As a further improvement of the present technical solution, the friction force between the water retaining plate and the sliding column is greater than the elastic force of the connecting spring, smaller than the gravity of the float, and smaller than the buoyancy of the float caused by water.

[0021] As a further improvement of this technical solution, the diameter of the drainage hole is larger than that of the drip hole, so that when the water accumulated in the liquid storage chamber is discharged through the drainage hole, a large amount of water is prompted to enter the drainage pipe below through the top of the partition below.

[0022] As a further improvement of the present technical solution, a slot is provided in the upper half between the inner ring and the outer ring of the drain pipe, and a slide groove is provided in the lower half. A filter is provided in the slot. When the filter is in the slot, a movable cavity is provided between one end of the slot and one end of the filter for adjusting the position of the filter.

[0023] As a further improvement of the technical solution, a bevel is provided at the corner of one end of the cavity where the filter moves relative to the cavity;

[0024] A slider is provided for sliding in the slide groove, one end of the inner ring of the slider penetrates into the drain pipe and is fixedly connected to the push plate; a push arm is fixedly provided on the top of the end of the slider close to the bevel, one end of the slide groove is connected with one end of the slot, and the push arm enters the slot and drives the filter to move through the bevel.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. In the anti-scour system for rock slopes below the upper soil cover layer in this cold and arid area, when the drainage pipe is blocked, the water flow inside the drainage pipe is collected through the interconnecting pipe, forcing the driving component inside the interconnecting pipe to move, so that the push plate can slide inside the drainage pipe. The sliding force can push away multiple blockages in the drainage pipe, thereby reducing the congestion in the drainage pipe and improving the drainage efficiency of the slope soil.

[0027] 2. In the anti-scour system of the rock slope below the upper soil cover layer in the cold and arid area, when the water accumulated in the liquid storage chamber is discharged through the drainage hole, a large amount of water will fall into the top of the partition located below. Due to the small aperture of the drip hole, the water on the top of the partition cannot be quickly discharged. At this time, the water on the top of the partition will enter the interconnecting pipe, and under the action of a large amount of water flow, the push plate will be pushed and dispersed, prompting the push plate to move, thereby clearing the blockage in the push plate below.

[0028] 3. In the anti-scour system for the rock slope under the upper soil cover layer in the cold and arid area, the push plate can not only disperse the blockage in the drainage pipe during movement, but also drive the filter to move during movement, so that the position of the push plate at the through hole changes, thereby increasing the service life of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the interconnecting pipe of the present invention;

[0030] Figure 2 Schematic diagram of the cross-sectional structure of the drainage pipe of the present invention;

[0031] Figure 3 It is a structural schematic diagram of the float of the present invention;

[0032] Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure at A;

[0033] Figure 5 For the present invention Figure 3 A magnified schematic diagram of the structure at B;

[0034] Figure 6 It is a structural schematic diagram of the filter screen of the present invention;

[0035] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at C;

[0036] Figure 8 It is a schematic diagram of the motion state of the float of the present invention;

[0037] Figure 9 It is a structural schematic diagram of the water stop plate of the present invention;

[0038] Figure 10 For the present invention Figure 9 A magnified schematic diagram of the structure at D;

[0039] Figure 11 The overall structure of the present invention is schematically shown Figure 1 ;

[0040] Figure 12 The overall structure of the present invention is schematically shown Figure 2 ;

[0041] Figure 13 The overall structure of the present invention is schematically shown Figure 3 .

[0042] The meaning of each number in the figure is:

[0043] 100, drain pipe; 101, through hole; 102, filter; 103, movable cavity; 104, chute; 105, bevel;

[0044] 110, interconnecting pipe; 111, partition; 112, drip hole; 120, push plate; 121, water channel; 122, slider; 123, push arm; 130, water stop plate; 131, drain hole; 140, float; 141, connecting rope;

[0045] 150. Outer tube; 151. Inner tube; 152. Water suction chamber; 160. Water baffle; 161. Sliding column; 162. Connecting spring; 163. Pull rope. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0049] The soil cover layer takes aeolian silt as an example. The present invention provides an anti-scour system for rock slopes with an upper soil cover layer in cold and arid areas. For some areas with thicker upper soil cover layers, since some soil cover layers (such as aeolian silt) have poor physical and mechanical properties, in order to ensure the stability and safety of the slope, the slope angle of the upper soil cover layer should be greater than or equal to the critical slope angle to avoid the occurrence of an air-facing surface that endangers the safety and stability of the slope. Since the overall slope of the project is relatively high, the use of "steep slope + platform" instead of "slope to the top" can improve the overall stability of the slope and reduce the degree of scour and erosion of the slope surface. The stability of unexcavated slopes is better in their natural state, but under continuous rainfall and heavy rain, the slope soil is saturated, resulting in a decrease in the shear strength of the granular body of the cover layer, plastic deformation of the soil cover layer, and creep deformation, which causes the pore water pressure of the soil to rise, triggering overall sliding of the saturated soil zone or slope subsidence. In addition, the main cause of landslides in cold and arid areas is the frost heave and thawing of the slope soil layer. Considering the impact of water erosion on the rock, which leaves the upper rock mass exposed to the elements, the deformation and failure mode of the rock slope is primarily tensile cracking and staggered collapse. As the depth and width of the erosion increase, the rock mass above the erosion hole collapses, forming vertical tensile cracks. As the vertical tensile cracks develop and connect, the slope collapses as a whole. Therefore, to prevent rainwater from infiltrating or scouring along the slope surface and significantly reduce slope erosion, the underwater rock excavation slope is lined with C25 reinforced concrete slabs with a thickness of 20 cm. The above-water rock excavation slope is supported by hanging steel mesh and sprayed anchors. The rock slope is protected by a system of mortar anchors. The anchors have a diameter of 25 mm, a length of 9 m, penetrate 8.9 m into the bedrock, and protrude 0.1 m. The spacing and rows are both 2 m, arranged in a plum blossom pattern, and injected perpendicular to the slope surface. The excavation slope ratio of the upper soil cover layer is 1:2.0. To prevent soil erosion or damage from precipitation, concrete grid beams are embedded in the slope. Precast concrete slabs are installed between the concrete grid beams to prevent rainfall and snowmelt from seeping into the soil. Soil anchors with a spacing of 4m x 3m and a length of 12.0m are installed on the two slopes below the cover layer. They penetrate 11.9m into the soil, protrude 0.1m, and have a downward inclination angle of 15°. To prevent pre-drilled holes from collapsing during support operations, the main structure of the soil nails is made of steel pipes.

[0050] At the same time, the rock and soil at the toe of the slope are susceptible to erosion by running water, which reduces their shear strength and causes them to be carried away. This leaves the upper rock exposed to the air and in tension under its own weight. As the depth and width of the erosion increase, the rock above the erosion hole begins to collapse, forming a natural equilibrium arch and upward cracks. At the same time, the rock at the top of the slope develops vertical tensile cracks under the bending moment caused by its own weight. Eventually, the cracks penetrate, and the slope collapses as a whole. Therefore, anti-scouring tooth walls are installed at the toe of the slope, and concrete is used to cap the top of each slope level.

[0051] Secondly, for slopes in cold and arid regions with high soil moisture content, removing accumulated moisture is crucial to prevent freeze-thaw accumulation, which can significantly reduce the shear strength of the slope and cause landslides. Therefore, drainage pipes 100 are installed within the spray protection area of ​​each slope level. Furthermore, drainage ditches are installed between each slope level to collect runoff from the slope surface.

[0052] See also Figure 1-Figure 3 As shown, the slope anti-scour system includes a plurality of drainage pipes 100, one end of which passes through the precast concrete slab and penetrates into the slope soil, and an interconnecting pipe 110 arranged in the slope soil; wherein, the end of the drainage pipe 100 away from the slope soil is the drainage end, and the drainage end is tilted downward; at the same time, the interconnecting pipe 110 is also tilted, and the tilt state is preferably consistent with the tilt state of the slope, so as to facilitate construction. The top of the drainage pipe 100 is penetrated by a plurality of through holes 101 for allowing the water in the slope soil to flow into the drainage pipe 100, and a push plate 120 is slidingly arranged inside, and the outer ring of the push plate 120 has a water groove 121 for water to flow through; wherein, one end of the plurality of longitudinally arranged drainage pipes 100 are all connected to the interconnecting pipe 110, and a liquid storage chamber is provided inside the interconnecting pipe 110 between two adjacent drainage pipes 100. When the inside of the drainage pipe 100 is blocked, the water inside the drainage pipe 100 flows into the liquid storage chamber through the water groove 121;

[0053] The bottom of the liquid storage chamber has a drainage assembly, and a driving assembly is arranged inside; the drainage assembly discharges the water when the water in the liquid storage chamber reaches a preset height; the driving assembly uses the height of the water level in the liquid storage chamber to adjust the position of the push plate 120 in the drain pipe 100, so that the push plate 120 can push away the blockage in the drain pipe 100 during the process of adjusting the position.

[0054] That is to say, when the drain pipe 100 is blocked, the water flow inside the drain pipe 100 is collected through the interconnecting pipe 110, forcing the driving component inside the interconnecting pipe 110 to move, so that the push plate 120 can slide inside the drain pipe 100, and the sliding force is used to disperse multiple blockages in the drain pipe 100, thereby reducing the congestion in the drain pipe 100, facilitating the discharge of water in the drain pipe 100, and improving the drainage efficiency of the slope soil.

[0055] It should be noted that the top end of the drainage pipe 100 is preferably a closed structure, and the bottom end is an open structure, and the bottom end passes through the slope soil to drain excess water in the interconnecting pipe 110.

[0056] like Figure 3 and Figure 8 As shown, a water stop plate 130 is fixedly installed inside the interconnecting pipe 110 between two adjacent drain pipes 100, and a partition plate 111 is fixedly installed below the interconnecting pipe 110 where it communicates with the drain pipe 100. The partition plate 111 and the water stop plate 130 separate the interior of the interconnecting pipe 110 into a liquid storage chamber. Figure 4 As shown, a drip hole 112 is provided on the top of the partition 111. When the drain pipe 100 is clogged, the water in the interconnecting pipe 110 flows into the liquid storage cavity through the drip hole 112. Figure 5 As shown, a drainage hole 131 is opened on the top of the water stop plate 130, and the drainage hole 131 is connected to the drainage assembly.

[0057] Figure 3 The specific structure of the drive assembly is shown in FIG. The drive assembly includes a float 140 disposed in the liquid storage chamber and a connecting rope 141 connecting the float 140 and the push plate 120. At the same time, the weight of the float 140 is greater than the weight of the push plate 120. Specifically, one end of the connecting rope 141 is connected to the float 140, and the other end slides through the partition 111 and is fixedly connected to the push plate 120. In addition, a round rod (located at Figure 3 The portion where the connecting rope 141 is bent 90 degrees) is used to change the angle of the connecting rope 141 so that the connecting rope 141 can pull the push plate 120 to move.

[0058] Working principle:

[0059] When the drain pipe 100 is not blocked, water from the slope soil flows into the drain pipe 100 through the through hole 101. Since the drain end of the drain pipe 100 is tilted downward, the drain pipe 100 is in a state where the connection with the interconnecting pipe 110 is high and the drain end is low. When water flows into the drain pipe 100, it is discharged through the drain end of the drain pipe 100.

[0060] When the drain pipe 100 is blocked, the moisture in the slope soil flows into the drain pipe 100 through the through hole 101. Since the water in the drain pipe 100 cannot be discharged through the drainage end, the water will accumulate inside the drain pipe 100. When the water level in the drain pipe 100 is higher than the connection between the drain pipe 100 and the interconnecting pipe 110, the water in the drain pipe 100 will flow into the top of the partition 111 through the water groove 121, and then flow into the liquid storage chamber through the drip hole 112 at the top of the partition 111. Then, as the water in the liquid storage chamber continues to increase, the buoyancy forces the float 140 in the liquid storage chamber to move upward. During this upward movement, the distance between the float 140 and the push plate 120 decreases. At this point, the connecting rope 141 is loose, and no longer restricts the push plate 120. Since the drain pipe 100 is tilted, the push plate 120 slides toward the drain end of the drain pipe 100 under its own weight, thereby dispersing any obstructions within the drain pipe 100. Furthermore, the push plate 120 is preferably made of metal, which is heavier, thereby increasing the thrust of the push plate 120 during its movement.

[0061] When the blockage is pushed away, the water in the drain pipe 100 is no longer blocked and will no longer flow into the liquid storage chamber. Then, when the drainage component drains the water in the liquid storage chamber, the float 140 begins to move downward, and then the push plate 120 is pulled back to its original position through the connecting rope 141, so as to carry out the next pushing work.

[0062] In some embodiments, as Figure 3 and Figure 5 As shown, the drainage assembly includes an outer tube 150 and an inner tube 151 fixedly arranged on the top of the water stop plate 130; wherein, the top of the outer tube 150 is a closed structure, and a gap is left between the bottom end of the outer tube 150 and the top of the water stop plate 130 for water to flow through; the bottom of the inner tube 151 is connected to the drainage hole 131; a water absorption cavity 152 is formed between the inner circle of the outer tube 150 and the outer circle of the inner tube 151, and the top height of the inner tube 151 is lower than the top height of the outer tube 150.

[0063] In this way, when water just enters the liquid storage chamber, due to the obstruction of the inner tube 151, the water in the liquid storage chamber will not be discharged, and will continue to accumulate, thereby driving the float 140 to move upward; when the water level in the liquid storage chamber is higher than the height of the inner tube 151, the water in the liquid storage chamber will be discharged through the inner tube 151 and the drainage hole 131, and negative pressure will be generated in the water absorption chamber 152, forming a siphon. Under the action of the siphon, the water outside the outer tube 150 will be sucked into the water absorption chamber 152, thereby completely extracting the water outside the outer tube 150 and completing the drainage.

[0064] Furthermore, since the interconnecting pipe 110 is in an inclined state, in order to improve the drainage effect, the tops of the outer pipe 150 and the inner pipe 151 are kept parallel to the horizontal plane.

[0065] In other embodiments, Figure 9 and Figure 10 As shown, the drainage assembly includes a water baffle 160 mounted on top of the water stop 130, and a sliding post 161 fixedly mounted on top of the water baffle 130. The sliding post 161 slides through the water baffle 160, and a connecting spring 162 is provided between the top of the sliding post 161 and the top of the water baffle 160, elastically connecting the two. The friction between the water baffle 160 and the sliding post 161 is greater than the elastic force of the connecting spring 162, but less than the gravity of the float 140 and the buoyancy of the water on the float 140. Furthermore, a pull rope 163 is provided between the bottom of the float 140 and the top of the water baffle 160, connecting the two. When the float 140 moves upward to the bottom of the partition 111, the pull rope 163 switches from a loose state to a taut state, pulling the water baffle 160 upward.

[0066] Thus, in the initial state, the connecting spring 162 uses its own elasticity to push the water baffle 160 to the top of the water stop plate 130, and the water in the liquid storage chamber cannot be discharged through the drain hole 131. When the float 140 moves up to the bottom of the partition 111, the float 140 pulls the water baffle 160 upward via the pull rope 163. The upward movement of the water baffle 160 opens the drain hole 131, and the water in the liquid storage chamber is discharged through the drain hole 131. During this process, because the friction between the water baffle 160 and the sliding post 161 is greater than the elasticity of the connecting spring 162, the connecting spring 162 cannot push the water baffle 160 downward. Therefore, when the water in the liquid storage chamber is discharged, the float 140 falls to the top of the water baffle 160. The float 140 uses its own weight to press the water baffle 160 downward and reset, thereby closing the drain hole 131.

[0067] like Figure 8 As shown, it is worth noting that the diameter of the drain hole 131 is larger than that of the drip hole 112. Thus, when the water accumulated in the liquid storage chamber is discharged through the drain hole 131, a large amount of water will fall onto the top of the partition 111 located below. Since the drip hole 112 has a smaller diameter, the water on the top of the partition 111 cannot be quickly drained out. At this time, the water on the top of the partition 111 will enter the drain pipe 100. Under the action of the large amount of water flow, the push plate 120 is pushed and dispersed, prompting the push plate 120 to move, thereby clearing the blockage in the push plate 120 below.

[0068] Moreover, in order to prevent the soil of the slope from falling into the drain pipe 100 through the through hole 101, a filter 102 is currently installed on the outer or inner ring of the drain pipe 100. However, since the filter 102 is in a fixed state, the part of the filter 102 located at the through hole 101 is prone to rupture after long-term use. Figure 2As shown, the upper part of the drain pipe 100 between the inner and outer rings is provided with a slot, and the lower part is provided with a chute 104. A filter screen 102 is provided in the slot. When the filter screen 102 is in the slot, a movable cavity 103 is provided between one end of the slot and one end of the filter screen 102 for adjusting the position of the filter screen 102. Figure 6 and Figure 7 As shown, a bevel 105 is provided at the corner of one end of the cavity 103 where the filter 102 moves relative to each other; a slider 122 is provided for sliding in the slide 104, one end of the inner circle of the slider 122 penetrates into the interior of the drain pipe 100 and is fixedly connected to the push plate 120; a push arm 123 is fixedly provided on the top of the end of the slider 122 close to the bevel 105, one end of the slide 104 is connected to one end of the slot, and the push arm 123 enters the slot and drives the filter 102 to move through the bevel 105.

[0069] Working principle:

[0070] When push plate 120 moves toward the drain end of drain pipe 100, it drives slider 122, which in turn drives push arm 123. Push arm 123, through its beveled edge 105, drives filter screen 102 toward movable cavity 103, thereby changing the position of filter screen 102 within through-hole 101. In other words, during its movement, push plate 120 not only dissipates blockages within drain pipe 100 but also drives filter screen 102 to shift position, changing the location of push plate 120 within through-hole 101 and improving the service life of filter screen 102.

[0071] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A scour prevention system for a rock slope with an upper soil cover layer in a cold and arid region, comprising concrete grid beams interlaced and embedded in the surface of the slope, precast concrete slabs arranged in the concrete grid beams, the precast concrete slabs and the concrete grid beams forming a grid beam slope protection, drainage ditches for collecting water from the slope surface arranged between each level of the grid beam slope protection, a plurality of drainage pipes (100) with one end penetrating the precast concrete slab and penetrating into the slope soil, and interconnecting pipes (110) arranged in the slope soil; wherein, The drainage end of the drainage pipe (100) is tilted downward; a plurality of through holes (101) are provided through the top of the drainage pipe (100) for allowing water from the slope soil to flow into the drainage pipe (100), and a push plate (120) is provided inside for sliding; the push plate (120) is characterized in that the outer ring of the push plate (120) has a water groove (121) for water to flow through; wherein: One end of each of the plurality of longitudinally arranged drainage pipes (100) is connected to an interconnecting pipe (110), and a liquid storage cavity is provided inside the interconnecting pipe (110) between two adjacent drainage pipes (100). When the drainage pipe (100) is blocked, water in the drainage pipe (100) flows into the liquid storage cavity through the water channel (121); The bottom of the liquid storage chamber has a drainage component, and the interior of the drainage component has a driving component; the drainage component discharges the water when the water in the liquid storage chamber reaches a preset height; the driving component adjusts the position of the push plate (120) in the drainage pipe (100) using the height of the water level in the liquid storage chamber, so that the push plate (120) pushes away the blockage in the drainage pipe (100) during the process of adjusting the position.

2. The anti-scour system for rock slopes with an upper soil cover layer in cold and arid regions according to claim 1, characterized in that: A water stop plate (130) is fixedly provided inside the interconnecting pipe (110) and located between two adjacent drainage pipes (100). A partition plate (111) is fixedly provided below the portion where the interconnecting pipe (110) communicates with the drainage pipe (100). The partition plate (111) and the water stop plate (130) separate the interior of the interconnecting pipe (110) into a liquid storage chamber.

3. The anti-scour system for rock slopes with an upper soil cover layer in cold and arid regions according to claim 2, characterized in that: A drip hole (112) is provided through the top of the partition (111). When the drain pipe (100) is clogged, the water in the interconnecting pipe (110) flows into the liquid storage cavity through the drip hole (112). A drainage hole (131) is provided on the top of the water stop plate (130), and the drainage hole (131) is communicated with a drainage assembly.

4. The anti-scour system for rock slopes with an upper soil cover layer and a lower rock cover layer in cold and arid regions according to claim 1, characterized in that: The driving assembly comprises a float (140) disposed in the liquid storage chamber, and a connecting rope (141) connecting the float (140) and the push plate (120); the weight of the float (140) is greater than the weight of the push plate (120).

5. The anti-scour system for rock slopes with an upper soil cover layer and a lower rock cover layer in cold and arid regions according to claim 1, characterized in that: The drainage assembly comprises an outer tube (150) and an inner tube (151) fixedly arranged on the top of the water stop plate (130); wherein: The top of the outer tube (150) is a closed structure, and a gap for water flow is left between the bottom end of the outer tube (150) and the top of the water stop plate (130); The bottom of the inner tube (151) is in communication with the drainage hole (131); A water absorption cavity (152) is formed between the inner ring of the outer tube (150) and the outer ring of the inner tube (151), and the top height of the inner tube (151) is lower than the top height of the outer tube (150).

6. The anti-scour system for rock slopes with an upper soil cover layer and a lower rock cover layer in cold and arid regions according to claim 4, characterized in that: The drainage assembly includes a water baffle (160) arranged on the top of the water baffle (130), and a sliding column (161) fixedly arranged on the top of the water baffle (130), wherein the sliding column (161) slides through the water baffle (160), and a connecting spring (162) is provided between the top of the sliding column (161) and the top of the water baffle (160) to elastically connect the two. A pull rope (163) is provided between the bottom of the float (140) and the top of the water baffle (160) to connect the two. When the float (140) moves up to the bottom of the partition (111), the pull rope (163) switches from a loose state to a taut state to pull the water baffle (160) upward.

7. The anti-scour system for rock slopes with an upper soil cover layer and a lower rock slope in cold and arid regions according to claim 6, characterized in that: The friction force between the water baffle (160) and the sliding column (161) is greater than the elastic force of the connecting spring (162), less than the gravity of the floating ball (140), and also less than the buoyancy of the floating ball (140) caused by water.

8. The anti-scour system for rock slopes with an upper soil cover layer and a lower rock slope in cold and arid regions according to claim 3, characterized in that: The diameter of the drainage hole (131) is larger than the diameter of the drip hole (112), so that when the water accumulated in the liquid storage chamber is discharged through the drainage hole (131), a large amount of water is prompted to enter the drainage pipe (100) located below through the top of the partition (111) located below.

9. The anti-scour system for rock slopes with an upper soil cover layer and a lower rock cover layer in cold and arid regions according to claim 1, characterized in that: A slot is provided in the upper portion between the inner ring and the outer ring of the drain pipe (100), and a slide groove (104) is provided in the lower portion. A filter screen (102) is provided in the slot. When the filter screen (102) is located in the slot, a movable cavity (103) is provided between one end of the slot and one end of the filter screen (102) for adjusting the position of the filter screen (102).

10. The anti-scour system for rock slopes with an upper soil cover layer and a lower rock cover layer in cold and arid regions according to claim 9, characterized in that: A bevel (105) is provided at a corner of one end of the filter screen (102) relative to the movable cavity (103); A slider (122) is slidably provided in the chute (104), one end of the inner circle of the slider (122) penetrates into the interior of the drain pipe (100) and is fixedly connected to the push plate (120); a push arm (123) is fixedly provided at the top of one end of the slider (122) close to the oblique edge (105), one end of the chute (104) is communicated with one end of the slot, and the push arm (123) enters the slot and drives the filter (102) to move through the oblique edge (105).

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