Anti-scouring system for upper soil covering layer and lower rock slope in cold and arid area

Abstract

The invention relates to the technical field of slope protection, in particular to an anti-scouring system for an upper soil covering layer and a lower rock slope in a cold and arid area. One end of each drainage pipe penetrates through the prefabricated concrete plate and penetrates into the slope soil body, and the intercommunicating pipe is arranged in the slope soil body. Wherein the drainage end of the drainage pipe is arranged in a downward inclined manner; a plurality of through holes used for enabling water of a slope soil body to flow into the drainage pipe are formed in the top of the drainage pipe in a penetrating mode, and a push plate is slidably arranged in the drainage pipe; according to the anti-scouring system for the upper soil covering layer and the lower rock slope of the cold and arid area, when the drainage pipe is blocked, water flow in the drainage pipe is collected through the intercommunication pipe, a driving assembly in the intercommunication pipe is forced to move, and therefore a push plate can slide in the drainage pipe; and a plurality of blockages in the drainage pipe are pushed to be scattered by utilizing the sliding acting force, so that the congestion degree in the drainage pipe is reduced, and the drainage efficiency of a slope soil body is improved.

Description

Technical Field

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

[0002] Some soil cover layers (such as aeolian silt) are loosely structured, large-pore, low-shear-strength, and moderately compressible silts. Settlement, subsidence, frost heave damage, weathering and spalling, and water scouring can all cause soil landslides. Rock is a sedimentary rock with relatively high integrity and hardness in its natural state, but it softens and muddies when exposed to water to form weak interlayers. It is easily eroded by rain and wind, which reduces its strength and has poor resistance to erosion and scouring. In addition, the main cause of landslides in cold and arid areas is the frost heave and thawing of the slope soil layer, especially in spring when the temperature rises and the soil layer melts, which is prone to landslides.

[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, precast concrete block protection), comprehensive protection (hollow grass planting in concrete grids, hollow precast block grass planting, geosynthetics combined with plant protection, etc.).

[0004] In the process of slope protection, in order to remove the water accumulated in the slope soil, to 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. At present, drainage pipes are arranged within the spray protection range of each level of 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 arranged inside the outer pipe, the inner pipe is movably connected to the outer pipe, the inner pipe can be drawn out from the outer pipe, a shovel is arranged at the end of the inner pipe, and the shovel is fixedly connected to the inner pipe. The drainage pipe of the patent can discharge underground seepage water in the 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 discharge, thereby effectively reducing the underground water level of the 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 in the slope enters the drain pipe through the through hole, or due to external reasons, such as animals putting some obstacles into the drain pipe, the drain pipe needs to be cleaned. At present, the cleaning method of the drain pipe is mostly done manually. However, there is no cleaning mechanism in the current drain pipe. When the drainage is blocked before the cleaning cycle is reached, it will still affect the drainage efficiency of the slope soil. Summary of the invention

[0006] The purpose of the present invention is to provide an anti-scouring system for rock slopes below an upper soil cover layer in cold and arid areas to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above-mentioned purpose, a rock slope scour prevention system for the lower part of the upper soil cover layer in cold and arid areas is provided, comprising concrete grid beams staggered and embedded in the surface of the slope, precast concrete panels are arranged in the concrete grid beams, the precast concrete panels and the concrete grid beams together form 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; it also comprises a plurality of drainage pipes with one end penetrating the precast concrete panel and penetrating into the slope soil body, and an interconnecting pipe arranged in the slope soil body; wherein the drainage end of the drainage pipe is arranged to be inclined downward; a plurality of through holes for allowing the water of the slope soil body to flow into the drainage pipe are penetrated at the top of the drainage pipe, and a push plate is slidably arranged inside; the outer ring of the push plate has a water channel for water flow to pass through; wherein:

[0008] One end of the plurality of longitudinally arranged drainage pipes is connected to the interconnecting pipe, and a liquid storage cavity is arranged 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 groove;

[0009] The bottom of the liquid storage chamber has a drainage component and a driving component inside; the drainage component discharges 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 disperse the blockage in the drain pipe during the process of adjusting the position.

[0010] As a further improvement of the 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 interconnecting pipe where it is connected to 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 technical solution, a drip hole is provided through the top of the partition, and when the drainage pipe is blocked, 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 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 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 is left between the bottom end of the outer tube and the top of the water stop plate for water to flow through;

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

[0017] A water absorption cavity is formed between the inner circle of the outer tube and the outer circle 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 technical solution, the drainage assembly includes a water baffle plate arranged on the top of the water stop plate, and a sliding column fixedly arranged on the top of the water stop plate, the sliding column slides through the water baffle plate, and a connecting spring is arranged between the top of the sliding column and the top of the water baffle plate to elastically connect the two;

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

[0020] As a further improvement of the 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 floating ball, and smaller than the buoyancy of the floating ball caused by water.

[0021] As a further improvement of the present 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 technical solution, a slot is provided in the upper part between the inner circle and the outer circle of the drain pipe, and a slide groove is provided in the lower part. A filter is provided in the slot. When the filter is located 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 a corner of one end of the filter relative to the movable cavity;

[0024] A slider is slidably arranged in the slide groove, one end of the inner circle of the slider penetrates into the drain pipe and is fixedly connected to the push plate; a push arm is fixedly arranged 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 of the rock slope under the upper soil cover layer in the 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, and the sliding force is used to 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 baffle below. Since the aperture of the drip hole is small, the water on the top of the baffle cannot be quickly discharged. At this time, the water on the top of the baffle will enter the interconnecting pipe, and the push plate will be pushed and dispersed under the action of a large amount of water flow, prompting the push plate to move, so as to clear the blockage in the push plate below.

[0028] 3. In the anti-scour system of the rock slope under the upper soil cover layer in the cold and arid area, the push plate can not only disperse the blockages 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 It is a 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 ball of the present invention;

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

[0033] Figure 5 For the present invention Figure 3 A 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 schematic diagram of the structure at position C of FIG.

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

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

[0038] Fig.10 For the present invention Fig. 9 A schematic diagram of the structure at D of FIG.

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

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

[0041] Fig.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, moving 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, drainage hole; 140, float; 141, connecting rope;

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

[0046] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are 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 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0049] The soil cover layer takes aeolian silt as an example. The present invention provides an anti-scour system for the lower rock slope of the upper soil cover layer in cold and arid areas. For some areas with thicker upper soil cover layers, due to the poor physical and mechanical properties of some soil cover layers (such as aeolian silt), 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 appearance 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 "one 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 the unexcavated slope is better in the 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 soil pore water pressure to rise, triggering the overall sliding of the saturated soil zone or the subsidence of the slope. In addition, the main reason for landslides in cold and arid areas is the frost heave and thawing of the slope soil layer. Considering that the rock is eroded by flowing water, the upper rock mass will be in an air-exposed state. The deformation and failure mode of the rock slope is mainly tensile cracking and staggered collapse. With the continuous increase of erosion depth and width, the rock mass above the erosion hole collapses and forms vertical tensile cracks. As the vertical tensile cracks develop and penetrate, the slope will collapse as a whole. Therefore, in order to prevent rainwater from infiltrating or scouring along the slope and greatly reduce the erosion phenomenon of the slope, the underwater rock excavation slope is lined with C25 reinforced concrete slabs with a thickness of 20cm. The above-water rock excavation slope is treated with hanging steel mesh + sprayed anchor support, and the rock slope is protected by a system mortar anchor rod. The anchor rod has a diameter of 25mm, a length of 9m, a depth of 8.9m into the bedrock, and an exposure of 0.1m. The spacing and row spacing are both 2m, arranged in a plum blossom shape, and shot vertically into the slope. The excavation slope ratio of the upper soil cover layer is 1:2.0. To prevent precipitation from eroding or damaging the slope soil, concrete grid beams are embedded in the slope, and precast concrete slabs are set between the concrete grid beams to prevent rainfall and snowmelt from penetrating into the soil. The two-level slopes at the lower part of the cover layer are set with soil anchors with a spacing of 4m×3m and a length of 12.0m. They penetrate 11.9m into the soil, expose 0.1m, and have a downward inclination angle of 15°. They are arranged in a plum blossom shape. To prevent the collapse of pre-formed holes during support operations, the main structure of the soil nails uses steel pipes.

[0050] At the same time, the rock and soil at the foot of the slope are easily affected by the scouring of flowing water, which reduces the shear strength and is carried away, resulting in the upper rock being in an air-free state and in a tensile state under the action of its own weight; as the depth and width of the erosion continue to increase, the rock above the erosion hole begins to collapse and form a natural equilibrium arch, and forms 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, and eventually the tensile cracks penetrate, causing the slope to collapse as a whole. Therefore, an anti-scouring tooth wall is set at the foot of the slope, and concrete is used to press the top of each level of the slope.

[0051] Secondly, for soil slopes with high water content in cold and arid areas, the most important thing is to remove the water accumulated in the slope soil to prevent the accumulation of water due to freezing and thawing, which will cause a significant decrease in the shear strength of the slope soil and cause landslides. Therefore, drainage pipes 100 are arranged within the spray protection range of each level of slope. In addition, drainage ditches are set between each level of slope to collect water 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 penetrates 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 arranged to be inclined downward; at the same time, the interconnecting pipe 110 is also arranged to be inclined, and the inclined state is preferably consistent with the inclined 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 moisture of the slope soil to flow into the drainage pipe 100, and a push plate 120 is slidably arranged inside, and the outer circle of the push plate 120 has a water groove 121 for water flow to pass 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 arranged inside the interconnecting pipe 110 between two adjacent drainage pipes 100, and when the drainage pipe 100 is blocked, the water flow inside the drainage pipe 100 flows into the liquid storage chamber through the water groove 121;

[0053] A drainage assembly is provided at the bottom of the liquid storage chamber, and a driving assembly is arranged inside; the drainage assembly discharges water when the water in the liquid storage chamber reaches a preset height; the driving assembly adjusts the position of the push plate 120 in the drain pipe 100 using the height of the water level in the liquid storage chamber, so that the push plate 120 can disperse 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 is connected to the drain pipe 100. The partition plate 111 and the water stop plate 130 separate the inside of the interconnecting pipe 110 into a liquid storage chamber. Figure 4 As shown, 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 chamber through the drip hole 112; Figure 5 As shown, a drainage hole 131 is formed 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 diagram of the driving assembly is shown, and the driving assembly includes a floating ball 140 disposed in the liquid storage chamber, and a connecting rope 141 connecting the floating ball 140 and the push plate 120. At the same time, the weight of the floating ball 140 is greater than the weight of the push plate 120. Specifically, one end of the connecting rope 141 is connected to the floating ball 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 inside of the drain pipe 100 is not blocked, the water in 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, the water will be 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 in 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 increases, the floating ball 140 in the liquid storage chamber begins to move upward under the action of buoyancy. The distance between the floating ball 140 and the push plate 120 becomes closer during the upward movement. At this time, the connecting rope 141 is in a loose state, and no longer restricts the push plate 120. Since the drain pipe 100 is in an inclined state, the push plate 120 slides toward the drain end of the drain pipe 100 by its own weight, thereby pushing away the blockage in the drain pipe 100 during the sliding process. In addition, 120 is preferably made of metal material, which is heavier, thereby increasing the thrust of 120 when it moves.

[0061] When the blockage is dispersed, 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 discharges 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 dispersing work.

[0062] In some embodiments, Figure 3 and Figure 5 As shown, the drainage component 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 for water to flow through 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 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 to drive 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 to form 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 pumping out the water outside the outer tube 150 to complete 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, Fig. 9 and Fig.10 As shown, the drainage assembly includes a water baffle 160 disposed on the top of the water stop plate 130, and a sliding column 161 fixedly disposed on the top of the water stop plate 130. The sliding column 161 slides through the water baffle 160, and a connecting spring 162 is disposed between the top of the sliding column 161 and the top of the water baffle 160 to elastically connect the two. The friction 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 under water. At the same time, a pull rope 163 is disposed between the bottom of the floating ball 140 and the top of the water baffle 160 to connect the two. When the floating ball 140 moves up to the bottom of the partition 111, the pull rope 163 switches from a loose state to a tight state to pull the water baffle 160 up.

[0066] In this way, in the initial state, the connection spring 162 pushes the water baffle 160 to the top of the water stop plate 130 by its own elasticity, and the water in the liquid storage chamber cannot be discharged through the drainage hole 131. When the float 140 moves up to the bottom of the partition 111, the float 140 pulls the water baffle 160 up through the pull rope 163, and the water baffle 160 moves up to open the drainage hole 131, and the water in the liquid storage chamber is discharged through the drainage hole 131. In this process, since the friction between the water baffle 160 and the sliding column 161 is greater than the elasticity of the connection spring 162, the connection spring 162 cannot push the water baffle 160 downward. Therefore, when the water in the liquid storage chamber is discharged, when the float 140 falls to the top of the water baffle 160, the float 140 presses the water baffle 160 downward to reset by its own gravity, thereby closing the drainage hole 131.

[0067] like Figure 8 As shown, it is worth noting that the aperture of the drain hole 131 is larger than the aperture of the drip hole 112. In this way, when the water accumulated in the liquid storage chamber is discharged through the drain hole 131, a large amount of water will fall into the top of the partition 111 located below. Since the aperture of the drip hole 112 is small, the water on the top of the partition 111 cannot be quickly discharged. At this time, the water on the top of the partition 111 will enter the drain pipe 100, and the push plate 120 will be pushed and dispersed under the action of a large amount of water flow, prompting the push plate 120 to move, so as to achieve the cleaning of the blockage in the push plate 120 below.

[0068] In addition, 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 between the inner circle and the outer circle of the drain pipe 100 is provided with a slot, and the lower part is provided with a slide groove 104. A filter screen 102 is arranged 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. 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 slidably provided in the slide groove 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 bevel 105, one end of the slide groove 104 is connected to one end of the slot, and the push arm 123 enters the slot to drive the filter 102 to move through the bevel 105.

[0069] Working principle:

[0070] When the push plate 120 moves toward the drain end of the drain pipe 100, the push plate 120 drives the slider 122 to move, and the slider 122 moves the push arm 123. The push arm 123 moves through the bevel 105 to drive the filter 102 to move toward the moving cavity 103, and the position of the filter 102 at the through hole 101 is changed. In other words, the push plate 120 can not only push away the blockage in the drain pipe 100 during the movement, but also drive the filter 102 to move during the movement, so that the position of the push plate 120 at the through hole 101 is changed, thereby increasing the service life of the filter 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 by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A scour prevention system for a rock slope with an upper soil cover layer and a lower rock slope in a cold and arid region, comprising concrete grid beams interlaced and embedded in the surface of the slope, precast concrete panels arranged in the concrete grid beams, the precast concrete panels and the concrete grid beams together forming a grid beam slope protection, and drainage ditches for collecting water collected on the slope surface arranged between each level of the grid beam slope protection; further comprising a plurality of drainage pipes (100) with one end penetrating the precast concrete panels and penetrating into the soil body of the slope, and an interconnecting pipe (110) arranged in the soil body of the slope; wherein: The drainage end of the drainage pipe (100) is arranged to be 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 slidably provided inside; the feature is 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); a liquid storage chamber is provided inside the interconnecting pipe (110) between two adjacent drainage pipes (100); when the drainage pipe (100) is blocked, water inside the drainage pipe (100) flows into the liquid storage chamber through the water channel (121); The bottom of the liquid storage chamber has a drainage component, and the interior of the liquid storage chamber 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 uses the height of the water level in the liquid storage chamber to adjust the position of the push plate (120) in the drainage pipe (100), so that the push plate (120) can disperse the blockage in the drainage pipe (100) during the process of adjusting the position.

2. The anti-scour system for rock slopes under the upper soil cover layer in cold and arid regions according to claim 1, characterized in that: A water stop plate (130) is fixedly arranged inside the interconnecting pipe (110) and located between two adjacent drainage pipes (100). A partition plate (111) is fixedly arranged below the interconnecting pipe (110) where it 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 under the 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), and when the drainage pipe (100) is clogged, water in the interconnecting pipe (110) flows into the liquid storage chamber 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 connected to a drainage assembly.

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

5. The anti-scour system for rock slopes under the upper soil 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 to flow through 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 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).

6. The anti-scour system for rock slopes under the upper soil cover layer in cold and arid regions according to claim 4, characterized in that: The drainage assembly comprises a water baffle plate (160) arranged on the top of the water baffle plate (130), and a sliding column (161) fixedly arranged on the top of the water baffle plate (130); the sliding column (161) slides through the water baffle plate (160), and a connecting spring (162) is arranged between the top of the sliding column (161) and the top of the water baffle plate (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 tight state to pull the water baffle (160) upward.

7. The anti-scour system for rock slopes under the upper soil cover layer in cold and arid regions according to claim 6, characterized in that: The friction force between the water retaining plate (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 under the upper soil cover layer 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 plate (111) located below.

9. The anti-scour system for rock slopes under the upper soil cover layer in cold and arid regions according to claim 1, characterized in that: The upper part of the drain pipe (100) between the inner ring and the outer ring is provided with a slot, and the lower part is provided with a slide groove (104), a filter screen (102) is arranged in the slot, and 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 under the upper soil 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) that moves relative to the cavity (103); A slider (122) is slidably arranged in the slide groove (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 arranged at the top of one end of the slider (122) close to the bevel (105), one end of the slide groove (104) is connected to one end of the slot, and the push arm (123) enters the slot to drive the filter (102) to move through the bevel (105).

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