Rainwater scouring prevention slope protection device

Abstract

The utility model provides a kind of rainwater scouring revetment device, including roadbed slope, the roadbed slope top is equipped with water interception ditch, the water interception ditch side is equipped with water retaining dike, the water retaining dike bottom is equipped with drainage groove, the roadbed slope slope is equipped with at least two parallel distribution's torrent chute, the torrent chute both sides are equipped with at least one group of drainage groove, the torrent chute inside is equipped with energy dissipation ridge, the torrent chute export is equipped with energy dissipation baffle, the roadbed slope bottom is equipped with sand trap, the sand trap is equipped in the outlet below of torrent chute, the sand trap side is equipped with diversion channel, the diversion channel is communicated with the side of sand trap far from slope.The utility model is cooperated with water retaining dike by slope top water interception ditch, effectively intercepts slope top catchment, avoids water flow to directly scour slope, and is cooperated with torrent chute and drainage groove to enhance slope stability, it is applicable to different slope, soil quality's roadbed slope, especially suitable for catchment large or rainfall concentrated area.

Description

Technical Field

[0001] This utility model mainly relates to the field of roadbed protection technology, specifically a slope protection device to prevent rainwater erosion. Background Technology

[0002] As a crucial component of road engineering, the stability of roadbed slopes directly impacts the service life of roads and driving safety. In the natural environment, rainwater erosion is one of the main causes of roadbed slope instability, especially in areas with high water volume, steep slopes, loose soil, or concentrated rainfall. The damage caused by rainwater erosion is more pronounced in these areas, and slopes are prone to surface erosion, gully erosion, and even collapse under the action of rainwater. The runoff formed by rainwater continuously cuts the slope surface, leading to soil loss and slope instability.

[0003] Existing scour interception devices suffer from several drawbacks: water at the top of the slope can easily flow directly into the slope, lacking effective source interception; the water flow on the slope surface is uneven, easily leading to concentrated scour; the water flow velocity in the rapid flow channel is high, resulting in a large impact on the slope foot, and the sediment it carries can easily clog the downstream drainage system.

[0004] To address the aforementioned problems, this utility model provides a rainwater erosion prevention slope protection device. Through an integrated design of "slope top interception - slope surface diversion - slope toe energy dissipation", it achieves full-process control of rainwater runoff and reduces erosion of roadbed slopes. Utility Model Content

[0005] To address the shortcomings of current technology, this utility model combines existing technology and, based on practical applications, provides a slope protection device to prevent rainwater erosion.

[0006] The technical solution of this utility model is as follows: A slope protection device for preventing rainwater erosion includes a roadbed slope. A water interception ditch is provided at the top of the roadbed slope. A water retaining embankment is provided on the side of the water interception ditch away from the top of the slope. A diversion channel is provided at the bottom of the water retaining embankment. At least two parallel rapid flow channels are provided on the slope surface of the roadbed slope. At least one set of drainage channels is provided on both sides of the rapid flow channels. Energy dissipation sills are provided at intervals inside the rapid flow channels. An energy dissipation baffle is provided at the outlet of the rapid flow channels. A sedimentation basin is provided at the bottom of the roadbed slope. The sedimentation basin is located below the outlet of the rapid flow channels. A diversion channel is provided next to the sedimentation basin. The diversion channel is connected to the side of the sedimentation basin away from the slope.

[0007] Furthermore, the sedimentation tank is equipped with at least two baffles, and the baffles are provided with water inlets, the height of which increases sequentially along the water flow direction.

[0008] Furthermore, a water passage is provided between the sedimentation tank and the diversion channel, and the water passage is higher than the water outlet.

[0009] Furthermore, a permeable layer is provided at the bottom of the intercepting ditch, which is composed of stacked gravel and geotextile, and an impermeable membrane is provided on the inner wall of the intercepting ditch.

[0010] Furthermore, the bottom of the drainage ditch is provided with permeable bricks, a filter screen is provided at the connection between the drainage ditch and the rapid flow ditch, a connecting plate is provided at the end of the drainage ditch away from the rapid flow ditch, a connector is provided on the connecting plate, and at least two pre-embedded anchor rods that are firmly connected to the roadbed slope are provided at the bottom of the drainage ditch.

[0011] Furthermore, the water-retaining embankment is higher than the road surface height on the roadbed, and the diversion channel extends into the rapid flow channel.

[0012] Furthermore, the rapid flow channel is set along the slope direction, and the drainage channel is connected to the rapid flow channel and is distributed in a horizontally upward direction.

[0013] Furthermore, the energy dissipation sill is an arc-shaped protrusion, the height of the energy dissipation sill is 1 / 3 to 1 / 2 of the depth of the rapid flow channel, and the distance between adjacent energy dissipation sills is 1.5 to 2.5 meters.

[0014] Furthermore, the energy dissipation baffle is set horizontally or tilted upwards.

[0015] The beneficial effects of this utility model are: 1. This utility model effectively intercepts water runoff from the top of the slope by combining a slope-top intercepting ditch with a water-retaining embankment, preventing water flow from directly scouring the slope and controlling the risk of scouring at the source. It also enhances slope stability by combining with a rapid flow channel and a drainage channel. It is suitable for roadbed slopes with different slopes and soil types, and is especially suitable for areas with large water runoff or concentrated rainfall.

[0016] 2. This utility model forms a mesh-like flow guiding system through the rapid flow channel and drainage channel, which concentrates and guides the dispersed water flow on the slope, reducing surface erosion and gully erosion. At the same time, the filter screen and permeable layer can filter silt and prevent the drainage system from being blocked. Meanwhile, the energy dissipation sill, energy dissipation baffle and slope foot sedimentation basin in the rapid flow channel work together to gradually weaken the energy of the water flow, reduce the impact on the slope foot and reduce siltation. Attached Figure Description

[0017] Appendix Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Appendix Figure 2 This is a schematic diagram of the cross-sectional structure of the intercepting ditch of this utility model.

[0019] Appendix Figure 3 This is a schematic diagram of the rapid flow channel and drainage channel of this utility model.

[0020] Appendix Figure 4 This is a schematic diagram of the internal structure of the sedimentation tank of this utility model.

[0021] The following are the labels shown in the diagram: 1. Roadbed slope; 2. Interception ditch; 3. Water retaining embankment; 4. Diversion channel; 5. Rapid flow channel; 6. Drainage channel; 7. Energy dissipation sill; 8. Energy dissipation baffle; 9. Sedimentation basin; 10. Diversion channel; 11. Partition; 12. Water outlet; 13. Water channel opening; 14. Permeable layer; 15. Impermeable membrane; 16. Filter screen; 17. Connecting plate; 18. Connector; 19. Permeable brick; 20. Embedded anchor bolt. Detailed Implementation

[0022] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0023] like Figure 1-4 The diagram shown is a schematic diagram of the structure of a slope protection device for preventing rainwater erosion provided in this embodiment.

[0024] In this embodiment, the structure is mainly as follows: Figure 1 As shown, the roadbed slope 1 is provided with a water interception ditch 2 at the top of the roadbed slope 1 to intercept the water collected at the top of the slope and to collect and transport the water flow at the top of the slope. The cross-sectional dimensions (such as width × depth) and longitudinal slope of the water interception ditch 2 should be designed based on the local rainstorm intensity formula for hydrological calculation to ensure that it can cope with rainfall with a certain return period, such as once in 5 years or once in 10 years. A water retaining embankment 3 is provided on the side of the water interception ditch 2 away from the top of the slope to prevent water flow from entering the slope.

[0025] At least two parallel rapid flow channels 5 are provided on the slope surface of the roadbed slope 1 to guide the main flow. At least one set of drainage channels 6 are provided on both sides of the rapid flow channels 5 to collect and disperse the water flow and guide the water flow on the slope. It is recommended that the rapid flow channels 5 and drainage channels 6 be made of high-strength PVC or precast concrete. The foundation of the rapid flow channels 5 must be compacted to prevent uneven settlement and cracking.

[0026] A sedimentation basin 9 is set at the bottom of the roadbed slope 1 to settle sediment. The walls and bottom of the sedimentation basin 9 need to be treated to prevent water leakage from affecting the stability of the slope. The sedimentation basin 9 is located below the outlet of the rapid flow channel 5. A diversion channel 10 is set on the side of the sedimentation basin 9 to discharge clean water. The diversion channel 10 is connected to the side of the sedimentation basin 9 away from the slope. The rapid flow channel 5 is set along the slope direction. The drainage channel 6 is connected to the rapid flow channel 5 and is distributed horizontally upward.

[0027] like Figure 2As shown, a permeable layer 14 is provided at the bottom of the intercepting ditch 2. The permeable layer 14 is made of stacked gravel and geotextile to filter silt and sand and is regularly dredged and maintained. Alternatively, replaceable prefabricated permeable modules can be used. An impermeable membrane 15 is provided on the inner wall of the intercepting ditch 2 to prevent leakage. A diversion channel 4 is provided at the bottom of the water retaining embankment 3 to divert water from the intercepting ditch 2 and guide it to the rapid flow channel 5. The number, spacing and size of the diversion channels 4 are calculated based on the local rainstorm intensity formula to ensure that it can guide all the water in the intercepting ditch 2 into the rapid flow channel 5 in a timely manner and avoid water accumulation in the intercepting ditch 2. The water retaining embankment 3 is higher than the road surface height above the roadbed, and the diversion channels 4 extend into the rapid flow channel 5.

[0028] like Figure 3 As shown, the bottom of the drainage ditch 6 is provided with permeable bricks 19, and the connection between the drainage ditch 6 and the rapid flow ditch 5 is provided with a filter screen 16. The filter screen 16 has a variety of different aperture sizes to adapt to different terrains. The filter screen 16 is detachable and needs to be cleaned regularly to prevent mud and sand from entering the rapid flow ditch 5. The end of the drainage ditch 6 away from the rapid flow ditch 5 is provided with a connecting plate 17. The connecting plate 17 is provided with a connector 18 to facilitate the connection and assembly of the drainage ditch 6 on two adjacent rapid flow ditch 5. The connection is provided with sealing and water-stopping measures such as rubber gaskets and sealant. At least two pre-embedded anchor rods 20 are provided at the bottom of the drainage ditch 6 and are firmly connected to the roadbed slope 1. The drainage ditch 6 is firmly connected to the slope surface through pre-embedded parts, anchor rods, etc.

[0029] The rapid flow channel 5 is equipped with energy dissipation sills 7 at intervals. The energy dissipation sills 7 are smoothly connected to the bottom and walls of the channel to avoid stress concentration that could cause structural damage and reduce the water flow velocity. The energy dissipation sills 7 are arc-shaped protrusions. The height of the energy dissipation sills 7 is 1 / 3 to 1 / 2 of the depth of the rapid flow channel 5, and the distance between adjacent energy dissipation sills 7 is 1.5 to 2.5 meters. An energy dissipation baffle 8 is installed at the outlet of the rapid flow channel 5 to reduce the impact force of the water flow. The energy dissipation baffle 8 is installed horizontally or inclined upwards. The energy dissipation sills 7 and energy dissipation baffle 8 should be integrally formed with the channel body or rigidly connected.

[0030] like Figure 4 As shown, the sedimentation tank 9 is equipped with at least two baffles 11. The baffles 11 can be made of reinforced concrete or corrosion-resistant composite materials to dissipate energy in stages. The baffles 11 are provided with inlets 12. The inlets 12 of the first baffle 11 can be designed to be movable or larger in size to cope with the initial impact of large particles of sediment and guide the water flow to settle. The height of the inlets 12 increases sequentially along the water flow direction. The bottom of the sedimentation tank 9 is designed in the shape of a bucket to collect sediment and can be equipped with a sludge pump for periodic mechanical sludge removal. An inlet 13 is provided between the sedimentation tank 9 and the diversion channel 10. The inlet 13 is higher than the inlet 12. Its specific height and sludge removal cycle are calculated based on the local rainstorm intensity formula to facilitate effective sedimentation in the sedimentation tank 9.

[0031] The working principle of this embodiment is as follows: When rainwater falls, the water-retaining embankment 3 at the top of the slope blocks surface runoff and directs the water flow into the intercepting ditch 2. The permeable layer 14 in the intercepting ditch 2 filters the sediment, and the water flows through the diversion channel 4 into the rapid flow channel 5 on the slope. The rainwater dispersed on the slope converges into the rapid flow channel 5 through the drainage channel 6. The energy dissipation sill 7 in the rapid flow channel 5 gradually reduces the water flow velocity, and the energy dissipation baffle 8 at the outlet further slows down the scouring of the water flow on the bottom of the slope. The water finally enters the sedimentation basin 9 at the foot of the slope, where the sediment is gradually settled by the baffle 11, and the clean water is discharged through the diversion channel 10, realizing the whole process protection of the roadbed slope 1 from "source interception - slope diversion - slope foot energy dissipation".

Claims

1. A slope protection device against rainwater erosion, comprising a roadbed slope, characterized in that, A water interception ditch is provided at the top of the roadbed slope. A water retaining embankment is provided on the side of the water interception ditch away from the top of the slope. A diversion channel is provided at the bottom of the water retaining embankment. At least two parallel rapid flow channels are provided on the slope surface of the roadbed slope. At least one set of drainage channels is provided on both sides of the rapid flow channels. Energy dissipation sills are provided at intervals inside the rapid flow channels. An energy dissipation baffle is provided at the outlet of the rapid flow channels. A sedimentation basin is provided at the bottom of the roadbed slope. The sedimentation basin is located below the outlet of the rapid flow channels. A diversion channel is provided next to the sedimentation basin. The diversion channel is connected to the side of the sedimentation basin away from the slope.

2. The rainwater erosion prevention slope protection device according to claim 1, characterized in that, The sedimentation tank is equipped with at least two baffles, and the baffles are provided with water inlets, the height of which increases sequentially along the water flow direction.

3. The rainwater erosion prevention slope protection device according to claim 2, characterized in that, A water passage is provided between the sedimentation tank and the diversion channel, and the water passage is higher than the water outlet.

4. The rainwater erosion prevention slope protection device according to claim 1, characterized in that, The bottom of the intercepting ditch is provided with a permeable layer, which is composed of crushed stone and geotextile. The inner wall of the intercepting ditch is provided with an impermeable membrane.

5. The rainwater erosion prevention slope protection device according to claim 1, characterized in that, The bottom of the drainage ditch is equipped with permeable bricks, and a filter screen is provided at the connection between the drainage ditch and the rapid flow ditch. A connecting plate is provided at the end of the drainage ditch away from the rapid flow ditch, and a connector is provided on the connecting plate. At least two pre-embedded anchor rods that are firmly connected to the roadbed slope are provided at the bottom of the drainage ditch.

6. The rainwater erosion prevention slope protection device according to claim 1, characterized in that, The water-retaining embankment is higher than the road surface on the roadbed, and the diversion channel extends into the rapid flow channel.

7. The rainwater erosion prevention slope protection device according to claim 1, characterized in that, The rapid flow channel is set along the slope direction, and the drainage channel is connected to the rapid flow channel and is distributed in a horizontally upward direction.

8. The rainwater erosion prevention slope protection device according to claim 1, characterized in that, The energy dissipation sill is an arc-shaped protrusion, the height of which is 1 / 3 to 1 / 2 of the depth of the rapid flow channel, and the distance between adjacent energy dissipation sills is 1.5 to 2.5 meters.

9. The rainwater erosion prevention slope protection device according to claim 1, characterized in that, The energy dissipation baffle is set horizontally or tilted upwards.

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