A method for intercepting and clearing debris flows

Abstract

This invention discloses a method for intercepting and clearing debris flows. It employs a monolithic, plate-shaped barrier component within the debris flow channel to intercept and dissipate the debris flow. The key feature is that the barrier component is designed to move vertically. During a debris flow, the barrier component is positioned at the bottom of the channel to intercept and dissipate the flow. After the debris flow stops, the barrier component is moved upwards out of the channel for subsequent dredging. This invention facilitates rapid dredging of debris flow channels after interception, restoring the barrier structure to its debris flow-blocking function.

Description

Technical Field

[0001] This invention relates to the field of debris flow control technology, specifically to a method for debris flow interception and dredging. Background Technology

[0002] Debris flows are special types of floods caused by precipitation (heavy rain, glacial meltwater, snowmelt) flowing down valleys or mountain slopes, carrying large amounts of solid materials such as mud, sand, rocks, and boulders. They are a catastrophic geological phenomenon. Debris flows are characterized by their suddenness, high velocity, large volume, large material capacity, and strong destructive power. They often destroy transportation infrastructure such as roads and railways, and even villages and towns, causing enormous losses.

[0003] Constructing retaining dams within debris flow channels is a conventional method for debris flow management, especially in the downstream flow zone. Retaining dam structures in this area can intercept and dissipate the debris flow, guiding it towards rapid deposition. A typical debris flow basin can be divided into three sections based on its trajectory: the formation zone, the flow zone, and the deposition zone. The formation and flow zones are usually located in sparsely populated or uninhabited areas, while the deposition zone typically represents areas where the debris flow has moved beyond mountainous terrain and into more level, populated areas. Therefore, intercepting and managing debris flows in the sparsely populated flow zone in advance can prevent uncontrolled erosion and deposition downstream, thus avoiding damage to buildings and farmland on both sides of the channel. For example, the applicant's patent CN207211097U discloses a structure for energy dissipation thresholds used for debris flow prevention; and CN201710359515.4 discloses a flow-through debris flow barrier dam and dam group, etc., which are all of this type of structure.

[0004] Existing fixed retaining dams installed within debris flow channels lose their function once they become silted up. However, debris flows are seasonal disasters, and before source control in the debris flow source area is achieved, debris flow events often occur multiple times within the same season. Therefore, the existing fixed retaining dam structure is usually difficult to use for secondary interception. Restoring the dams to their original use requires timely dredging, but the dam's own structure can hinder dredging work, making it difficult to carry out.

[0005] To facilitate dredging, CN201210206457.9 disclosed an open debris flow barrier dam group, comprising at least two barrier dams. Each barrier dam includes a main dam and a secondary dam. One end of the main dam connects to the wall of the debris flow gully, while the other end is open. The secondary dam is positioned near the open end of the main dam, forming a T-shaped or cross-shaped structure with the main dam, and the end of the secondary dam furthest from the main dam points in the direction of the debris flow. The barrier dams are staggered along the debris flow gully. This invention provides an open debris flow barrier dam group with a multi-stage open design, combining interception and diversion, resulting in good interception performance. The open design allows dredging vehicles to easily move between the barrier dams for dredging, making dredging more convenient. However, the barrier dams are fixed within the gully, and their presence still obstructs dredging, hindering the dredging process.

[0006] Therefore, how to provide a mudslide dredging method that can more easily and quickly remove silt and restore its barrier function has become a problem that needs to be considered and solved by those skilled in the art. Summary of the Invention

[0007] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is: how to provide a mudslide interception and dredging method that can more easily achieve rapid dredging of the barrier device and restore its barrier function.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0009] A method for intercepting and clearing debris flows involves using a plate-shaped barrier component within the debris flow channel to intercept and dissipate the debris flow. The barrier component is designed to be movable vertically. When a debris flow occurs, the barrier component is positioned at the bottom of the channel to intercept and dissipate the debris flow. After the debris flow stops, the barrier component is moved upwards out of the bottom of the channel before the channel is cleared.

[0010] This method allows for flexible control of the retaining components, enabling them to intercept and dissipate energy during debris flows. However, during post-flow dredging, they can be moved from the bottom of the gully, greatly facilitating dredging and improving efficiency. After dredging, the retaining structure is restored to its debris flow interception function for future interception. Ideally, retaining components with an overall height not exceeding half the height of the debris flow gully should be used to facilitate upward lifting.

[0011] Furthermore, the debris flow channel is located within the flow zone of the debris flow. This is because the flow zone is typically located in sparsely populated or uninhabited areas, while the deposition zone is usually where the debris flow has already flowed out of the mountainous area and into a relatively flat and populated area. Therefore, intercepting and managing the debris flow in the sparsely populated flow zone in advance can prevent it from eroding and depositing in the downstream deposition zone, thus avoiding damage to buildings or farmland on both sides of the channel. This is especially important when there are already important buildings or farmland and other human facilities in the downstream deposition zone of the debris flow, making it essential to intercept and manage the debris flow in advance within the flow zone.

[0012] Furthermore, roads are constructed on both sides of the debris flow channel to facilitate the transportation of engineering vehicles.

[0013] Furthermore, the retaining components are multiple components spaced apart along the length of the debris flow channel. This achieves tiered interception and gradual energy dissipation, which can better improve the interception effect of debris flows and dissipate their impact energy. Because existing tiered interception dam structures can achieve good debris flow interception effects but are extremely unfavorable for dredging work, this method ensures both effective debris flow interception and significantly improves the convenience of dredging.

[0014] Furthermore, the retaining components are moved out of the bottom of the ditch and dismantled before dredging. This further improves dredging efficiency, especially when using excavating machinery, making it more convenient and faster.

[0015] Furthermore, the dredging methods include using (natural or artificial) water flow to gradually disperse the silt and / or using excavation (manual or mechanical) to excavate and remove the silt. The specific dredging process is existing technology. The innovation of this application lies mainly in the fact that the dredging work can be more conveniently carried out after the retaining components are controlled and moved out of the bottom of the ditch. Therefore, the dredging process itself will not be described in detail here.

[0016] Furthermore, this method relies on a debris flow interception device installed within the debris flow channel. The debris flow interception device includes two interception plates that are integrally installed along the cross-section of the debris flow channel. The interception plates are arranged in pairs and are positioned opposite each other. The outermost side of the interception plate can slide up and down on slide rails installed on the side walls of both sides of the debris flow channel. Each of the two interception plates is also equipped with a lifting control device on the side walls of both sides of the debris flow channel.

[0017] In this way, the barrier plate can normally be located at the lower end of the sliding rail. When a debris flow occurs, the barrier plate acts as an interceptor and energy dissipator, allowing the debris flow to accumulate quickly. After a debris flow occurs, the barrier plate can be raised using a lifting control device. This allows the accumulated silt to be quickly dredged or slowly dispersed by the water flow in the channel, restoring its barrier function. In cases where the lifting control device fails due to deep or highly cemented debris flows, the barrier plate can be easily disassembled, removed, dredged, and reused.

[0018] Furthermore, the inner sides of the guardrails are mating surfaces, and the mating surfaces of the two guardrails can mate with each other after the guardrails slide to the lower end of the slide rail.

[0019] This allows for better interception.

[0020] Furthermore, the barrier plate has a mating structure on its mating surface, which is either a protruding insertion protrusion or a groove that can match the insertion protrusion.

[0021] In this way, when the two barrier plates are joined together, the insertion protrusion is inserted into the insertion slot, which can better connect them into a whole and improve the interception effect.

[0022] Furthermore, the bottom of the lower end face of the two guardrails (adjacent positions) has an upwardly recessed drainage culvert.

[0023] In this way, when no mudslide occurs and the barrier plate is located at the lower end of the slide rail, the water in the ditch can be easily drained away, avoiding accumulation.

[0024] Furthermore, the lower half of the mating side of the two guardrails is made of an elastic material.

[0025] In this way, after the two retaining plates are joined together, the lower part of the middle area is made of elastic material. When a debris flow occurs, the elasticity will allow the material to be pushed aside by the debris flow, producing an elastic discharge and energy dissipation effect, reducing the impact of the debris flow on the retaining plates, and preventing the formation of a barrier lake by blocking the ditch when the debris flow is too large.

[0026] Furthermore, the elastic material is rubber. It features low cost and reliable elasticity.

[0027] Furthermore, elastic metal strips are embedded vertically inside the elastic material. These elastic metal strips are multiple strips arranged at intervals in the horizontal direction. The upper ends of the elastic metal strips are fixed to the barrier plate body, and the flexibility of the elastic metal strips gradually increases from top to bottom.

[0028] In this way, the flexible metal strip not only provides better support and elasticity for the elastic material, but also ensures that the elasticity of the material gradually increases from bottom to top. This means that when the debris flow is small and the impact force is low, the area of ​​the elastic material being dispersed is small; however, when the debris flow is large and the impact force is high, the area of ​​the elastic material being dispersed increases accordingly. This allows the area of ​​the elastic material being dispersed and discharged to automatically adjust to the impact force of the debris flow, greatly improving the stability of the barrier itself. Furthermore, during installation, the elastic material can be fixed by connecting the upper end of the flexible metal strip to the barrier body (which can be welded, injection molded, or cast into a single piece), simplifying assembly.

[0029] Furthermore, the slide rail is installed in the slide rail groove, and rollers are provided on the lower outer side of the baffle plate and cooperate with the slide rail.

[0030] This ensures better stability and smoothness of the sliding motion.

[0031] Furthermore, an elastic sealing skin is fixedly installed on each side of the upper end of the slide rail groove.

[0032] This protects the slide rail grooves and prevents stones from entering and causing blockages. At the same time, the elastic sealing skin does not affect the up-and-down sliding of the barrier plate.

[0033] Furthermore, the elastic sealing layer is made of rubber. It is inexpensive and has stable elasticity.

[0034] Furthermore, a gap is left in the middle of the two elastic sealing sheets on opposite sides, and a row of elastic fine brushes is provided on each of the opposite ends of the two elastic sealing sheets, with the front ends of the elastic fine brushes staggered to form a seal.

[0035] In this way, the sealing is achieved by the elastic fine brushes at the front end of the elastic sealing skin. This not only makes it easier for the barrier to break the seal when sliding up and down without affecting its movement, but more importantly, the interlaced elastic fine brushes sealing the guide rail groove openings ensure that large particles of mud, sand, and stones cannot enter, while flowing water and fine mud can enter through the fine brushes. This not only avoids clogging but also lubricates the guide rail, facilitating the up and down sliding of the barrier. Combined with the water spraying effect of the water pipes embedded in the sliding rail groove, this ensures better reliability of the barrier sliding in the chute, both before and after a debris flow. Thus, even if some debris flows over the barrier and downwards during a debris flow impact, it will not cause blockage of the sliding rail groove. In implementation, the elastic fine brushes consist of bundles of several long, columnar elastic bodies arranged in one or more rows, and can be made of materials such as rubber, metal, or elastic plastic.

[0036] Furthermore, a water pipe is also embedded along the length of the inner wall of the slide rail groove. The upper end of the water pipe is equipped with a water inlet connector for connecting to a water source. An outlet is also provided on the inner wall of the slide rail groove and connected to the water pipe. The outlet end is set at an angle downward.

[0037] This water pipe allows for flushing of the silt and sand entering the slide rail groove, ensuring the stability of the slide rail operation. Especially since dredging takes time, the silt and sand that has entered the slide rail groove may have settled and dried by the time dredging is complete, affecting the normal operation of the slide rail. At this point, water can be sprayed from the pipe to moisten the silt and sand in the slide rail groove. Because of the unique sealing structure at the top of the slide rail groove, the silt and sand that settles in the groove is relatively fine, and after spraying water, it quickly forms a slurry, thus no longer affecting the re-lowering of the baffle plate. In this way, while ensuring smooth slide rail movement, no additional auxiliary support structure is needed between the lower end of the baffle plate and the slide rail groove. The lower end of the baffle plate can be a straight plate with a width smaller than the slide rail groove, directly inserted into the slide rail groove, with the rollers pressed against the guide rail. The rollers and guide rails can be fitted with convex or concave wheels, ensuring that they do not restrict the baffle plate from lifting into the slide rail groove. In this way, the barrier plate can be supported and maintained by the elastic sealing skin on both sides of the barrier plate, and a gap is left between it and the slide rail groove. Therefore, as long as the slide rail groove has a certain depth, usually 10-30cm, it can ensure the stability and reliability of the barrier plate sliding in the slide rail groove, and it is also very convenient to remove the barrier plate directly from the slide rail groove after lifting it to the top of the slide rail groove to complete the disassembly.

[0038] Furthermore, a water pipe is embedded in the upper part of the inner sidewalls on both sides of the slide rail groove, and multiple water outlets are arranged at intervals and staggered front to back on the two water pipes.

[0039] This design allows the water pipes used for flushing mud and sand to better avoid the dead zones that can easily form on one side. More importantly, when the mudslide stops and the barrier needs to be pulled upwards from the bottom of the ditch, the water pipes on both sides can simultaneously lubricate the portion of the barrier located within the sliding rail groove, ensuring consistent lubrication on both sides and stable force distribution during the pulling process. This allows for a smoother lifting of the barrier.

[0040] Furthermore, a prefabricated fixed retaining wall that protrudes upward is provided on the downstream side of the lower half of the slide rail groove at the edge of the slide rail groove.

[0041] In this way, the prefabricated fixed retaining wall can provide sufficient support for the sliding barrier, ensuring sufficient stability during the process of blocking debris flow.

[0042] Furthermore, the lifting control device includes a winch installed on the upper end of the side wall of the debris flow channel, and the drum at the output end of the winch is connected to the baffle plate by a pull rope.

[0043] In this way, the winch's output power can be used to control the pull rope to slide the barrier upwards. When it is necessary to control the barrier downwards, the winch releases the pull rope and provides traction, allowing the barrier to slide down the rail under its own weight. Therefore, it has the advantages of simple structure, convenient control, and stable and reliable operation.

[0044] Furthermore, auxiliary traction devices are also provided on both sides of the upper part of the slide rail. The auxiliary traction devices include fixed piles fixed to the side walls of the debris flow channel, and elastic traction ropes with one end connected to the fixed pile and the other end connected to the side of the barrier plate.

[0045] In this way, with the help of the traction ropes on both sides, the stability of the barrier panel can be better maintained during the lowering process.

[0046] During implementation, the ends of the pull ropes and traction ropes connected to the barrier panels are all knotted and tied to the lugs on the barrier panels. This facilitates rapid disassembly of the barrier panels after they are pulled out of the bottom of the ditch.

[0047] Furthermore, it also includes a control center, which is connected to the rainfall monitoring system on one end and to the winch on the other.

[0048] When rainfall is light, the barrier panels can be retracted onto the slope, allowing water to flow smoothly. When rainfall approaches the threshold for a debris flow, the rainfall monitoring system sends a signal to the control center, which then sends a signal to the winch (and jacks). The winch lowers the barrier panels (while the jacks extend to support them), forming a stable barrier dam. This control method is more convenient and intelligent. Alternatively, the barrier panels can be kept in the lowered position during normal operation and raised after the debris flow is intercepted for easy dredging. Multiple barrier panels are spaced along the length of the debris flow channel. This staged interception and energy dissipation of the debris flow improves the interception effect and dissipates its impact energy.

[0049] In summary, this invention enables more convenient and rapid dredging of debris flow channels after debris flow interception, restoring their interception function. The device offers advantages such as automatic closing based on rainfall, ease of subsequent dredging, increased efficiency, extended service life, and disassembly and reuse, thus reducing costs. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the debris flow blocking device used in a specific embodiment of the present invention, in which the blocking plate is in the raised state.

[0051] Figure 2 This is a schematic diagram of the debris flow blocking device used in a specific embodiment of the present invention, in which the blocking plate is in the lowered state.

[0052] Figure 3 yes Figure 1 Cross-sectional view of the individual slide rail groove section.

[0053] Figure 4 yes Figure 3 The diagram shows the structure of the slide rail after the baffle plate has been removed. Detailed Implementation

[0054] The present invention will now be described in further detail with reference to specific embodiments.

[0055] Optimal Implementation Method: A debris flow interception and dredging method, which uses an integral plate-shaped retaining member in the debris flow channel to intercept and dissipate the debris flow. The method is characterized by using a retaining member with an overall height not exceeding half the height of the debris flow channel and designing it as a vertically movable structure. When a debris flow occurs, the retaining member is controlled to be at the bottom of the channel to intercept and dissipate the debris flow. After the debris flow stops, the retaining member is controlled to move upwards out of the bottom of the channel before the channel is dredged.

[0056] This method allows for flexible control of the retaining components, enabling them to intercept and dissipate energy during debris flows. Furthermore, they can be removed from the bottom of the gully during post-flow dredging, greatly facilitating dredging operations and improving efficiency. After dredging, the retaining structure is restored to its debris flow interception function, facilitating future interception.

[0057] The debris flow channel is located within the flow zone of the debris flow. This is because the flow zone is typically located in sparsely populated or uninhabited areas, while the deposition zone usually represents a flatter, more populated area where the debris flow has already flowed out of the mountainous region. Therefore, intercepting and managing debris flows in the sparsely populated flow zone in advance can prevent them from eroding and depositing uncontrollably in the downstream deposition zone, thus avoiding damage to buildings or farmland on both sides of the channel. This is especially important when there are already important buildings or farmland in the downstream deposition zone of the debris flow, making it essential to intercept and manage the debris flow in advance within the flow zone.

[0058] Roads are also constructed on both sides of the debris flow channel to facilitate the transportation of engineering vehicles.

[0059] The retaining components are multiple units spaced apart along the length of the debris flow channel. This achieves tiered interception and gradual energy dissipation, which can better improve the interception effect of debris flows and dissipate their impact energy. While existing tiered interception dam structures can effectively intercept debris flows, they are extremely inconvenient for dredging operations. Therefore, this method ensures both effective debris flow interception and significantly improves the convenience of dredging.

[0060] One method involves removing and dismantling the retaining structures from the bottom of the ditch before dredging. This further improves dredging efficiency, especially when using excavating machinery, making the process more convenient and faster.

[0061] The dredging methods include using (natural or artificial) water flow to gradually disperse the silt and / or using excavation (manual or mechanical) to remove the silt. The specific dredging process is existing technology. The innovation of this application lies mainly in the fact that the dredging work can be more conveniently carried out after the retaining components are moved out of the bottom of the ditch. Therefore, the dredging process itself will not be described in detail here.

[0062] This method relies on a debris flow interception device installed within the debris flow channel. (See attached image for details about the debris flow interception device.) Figure 1-4 The system includes two barrier plates 1 that are set along the cross-section of the debris flow channel. The barrier plates 1 are set in pairs and are arranged opposite each other. The outer side of the barrier plate can slide up and down on the slide rails 2 set on the side walls of the debris flow channel. The two barrier plates 1 are also equipped with lifting control devices on the side walls of the debris flow channel.

[0063] In this way, the barrier plate can normally be located at the lower end of the sliding rail. When a debris flow occurs, the barrier plate acts as an interceptor and energy dissipator, allowing the debris flow to accumulate quickly. After a debris flow occurs, the barrier plate can be raised using a lifting control device. This allows the accumulated silt to be quickly dredged or slowly dispersed by the water flow in the channel, restoring its barrier function. In cases where the lifting control device fails due to deep or highly cemented debris flows, the barrier plate can be easily disassembled, removed, dredged, and reused.

[0064] Among them, the inner sides of the barrier plate 1 are the mating surfaces, and the mating surfaces of the two barrier plates can be mated together after the barrier plate slides to the lower end of the slide rail 2.

[0065] This allows for better interception.

[0066] The barrier plate has a docking structure on its docking surface. The docking structure is either a plug-in protrusion 4 protruding from the docking surface or a plug-in groove 3 that can match the plug-in protrusion.

[0067] In this way, when the two barrier plates are joined together, the insertion protrusion is inserted into the insertion slot, which can better connect them into a whole and improve the interception effect.

[0068] Among them, the bottom of the lower end face of the two barrier plates 1 has a drainage culvert 17 formed by an upward indentation.

[0069] In this way, when no mudslide occurs and the barrier plate is located at the lower end of the slide rail, the water in the ditch can be easily drained away, avoiding accumulation.

[0070] The lower half of the joint side of the two guardrails is made of elastic material 8.

[0071] In this way, after the two retaining plates are joined together, the lower part of the middle area is made of elastic material. When a debris flow occurs, the elasticity will allow the material to be pushed aside by the debris flow, producing an elastic discharge and energy dissipation effect, reducing the impact of the debris flow on the retaining plates, and preventing the formation of a barrier lake by blocking the ditch when the debris flow is too large.

[0072] The elastic material is rubber, which is characterized by low cost and reliable elasticity.

[0073] Among them, elastic metal strips 16 are embedded vertically inside the elastic material 8. The elastic metal strips 16 are multiple strips arranged at intervals in the horizontal direction. The upper end of the elastic metal strip is fixed to the barrier plate body. The flexibility of the elastic metal strip gradually increases from top to bottom.

[0074] In this way, the flexible metal strip not only provides better support and elasticity for the elastic material, but also ensures that the elasticity of the material gradually increases from bottom to top. This means that when the debris flow is small and the impact force is low, the area of ​​the elastic material being dispersed is small; however, when the debris flow is large and the impact force is high, the area of ​​the elastic material being dispersed increases accordingly. This allows the area of ​​the elastic material being dispersed and discharged to automatically adjust to the impact force of the debris flow, greatly improving the stability of the barrier itself. Furthermore, during installation, the elastic material can be fixed by connecting the upper end of the flexible metal strip to the barrier body (which can be welded, injection molded, or cast into a single piece), simplifying assembly.

[0075] The slide rail 2 is installed in the slide rail groove 5, and the lower outer side of the baffle plate 1 is provided with a roller 6 which is fitted on the slide rail 2.

[0076] This ensures better stability and smoothness of the sliding motion.

[0077] Among them, an elastic sealing skin 18 is fixedly installed on both sides of the upper end of the slide rail groove 5.

[0078] This protects the slide rail grooves and prevents stones from entering and causing blockages. At the same time, the elastic sealing skin does not affect the up-and-down sliding of the barrier plate.

[0079] The elastic sealing skin 18 is made of rubber. It is inexpensive and has stable elasticity.

[0080] Among them, there is a gap in the middle of the two elastic sealing sheets 18 on opposite sides, and a row of elastic fine brushes 19 are provided on the opposite ends of the two elastic sealing sheets, with the front ends of the elastic fine brushes staggered to form a seal.

[0081] In this way, the sealing is achieved by the elastic fine brushes at the front end of the elastic sealing skin. This not only makes it easier for the barrier to break the seal when sliding up and down without affecting its movement, but more importantly, the interlaced elastic fine brushes sealing the guide rail groove openings ensure that large particles of mud, sand, and stones cannot enter, while flowing water and fine mud can enter through the fine brushes. This not only avoids clogging but also lubricates the guide rail, facilitating the up and down sliding of the barrier. Combined with the water spraying effect of the water pipes embedded in the sliding rail groove, this ensures better reliability of the barrier sliding in the chute, both before and after a debris flow. Thus, even if some debris flows over the barrier and downwards during a debris flow impact, it will not cause blockage of the sliding rail groove. In implementation, the elastic fine brushes consist of bundles of several long, columnar elastic bodies arranged in one or more rows, and can be made of materials such as rubber, metal, or elastic plastic.

[0082] Among them, a water pipe 20 is also buried in the inner wall of the slide rail groove along the length direction. The upper end of the water pipe is provided with a water inlet connector for connecting the water source. The inner wall of the slide rail groove is also provided with a water outlet 21 connected to the water pipe 20. The water outlet is set at an angle downward.

[0083] This water pipe allows for flushing of the silt and sand entering the slide rail groove, ensuring the stability of the slide rail operation. Especially since dredging takes time, the silt and sand that has entered the slide rail groove may have settled and dried by the time dredging is complete, affecting the normal operation of the slide rail. At this point, water can be sprayed from the pipe to moisten the silt and sand in the slide rail groove. Because of the unique sealing structure at the top of the slide rail groove, the silt and sand that settles in the groove is relatively fine, and after spraying water, it quickly forms a slurry, thus no longer affecting the re-lowering of the baffle plate. In this way, while ensuring smooth slide rail movement, no additional auxiliary support structure is needed between the lower end of the baffle plate and the slide rail groove. The lower end of the baffle plate can be a straight plate with a width smaller than the slide rail groove, directly inserted into the slide rail groove, with the rollers pressed against the guide rail. The rollers and guide rails can be fitted with convex or concave wheels, ensuring that they do not restrict the baffle plate from lifting into the slide rail groove. In this way, the barrier plate can be supported and maintained by the elastic sealing skin on both sides of the barrier plate, and a gap is left between it and the slide rail groove. Therefore, as long as the slide rail groove has a certain depth, usually 10-30cm, it can ensure the stability and reliability of the barrier plate sliding in the slide rail groove, and it is also very convenient to remove the barrier plate directly from the slide rail groove after lifting it to the top of the slide rail groove to complete the disassembly.

[0084] Among them, a water pipe 20 is buried on the upper part of the inner sidewalls on both sides of the slide rail groove, and multiple water outlets 21 are arranged at intervals and staggered front and back on both water pipes.

[0085] This design allows the water pipes used for flushing mud and sand to better avoid the dead zones that can easily form on one side. More importantly, when the mudslide stops and the barrier needs to be pulled upwards from the bottom of the ditch, the water pipes on both sides can simultaneously lubricate the portion of the barrier located within the sliding rail groove, ensuring consistent lubrication on both sides and stable force distribution during the pulling process. This allows for a smoother lifting of the barrier.

[0086] Among them, a prefabricated fixed retaining wall 7 that protrudes upward is provided on the downstream side of the lower half of the slide rail groove 5 at the position of the slide rail groove.

[0087] In this way, the prefabricated fixed retaining wall can provide sufficient support for the sliding barrier, ensuring sufficient stability during the process of blocking debris flow.

[0088] The lifting control device includes a winch 9 installed on the upper end of the side wall of the debris flow channel, and the drum at the output end of the winch 9 is connected to the baffle plate 1 via a pull rope 10.

[0089] In this way, the winch's output power can be used to control the pull rope to slide the barrier upwards. When it is necessary to control the barrier downwards, the winch releases the pull rope and provides traction, allowing the barrier to slide down the rail under its own weight. Therefore, it has the advantages of simple structure, convenient control, and stable and reliable operation.

[0090] The upper sides of the slide rail are also equipped with auxiliary traction devices. The auxiliary traction devices include fixed piles 11 fixed to the side walls of the debris flow channel, and elastic traction ropes 12 with one end connected to the fixed pile and the other end connected to the side of the barrier plate.

[0091] In this way, with the help of the traction ropes on both sides, the stability of the barrier panel can be better maintained during the lowering process.

[0092] During implementation, the ends of the pull ropes and traction ropes connected to the barrier panels are all knotted and tied to the lugs on the barrier panels. This facilitates rapid disassembly of the barrier panels after they are pulled out of the bottom of the ditch.

[0093] It also includes a control center 13, one end of which is connected to the rainfall monitoring system 14, and the other end is connected to the winch.

[0094] When rainfall is light, the barrier panels can be retracted onto the slope, allowing water to flow smoothly. When rainfall approaches the threshold for a debris flow, the rainfall monitoring system sends a signal to the control center, which then sends a signal to the winch (and jacks). The winch lowers the barrier panels (while the jacks extend to support them), forming a stable barrier dam. This control method is more convenient and intelligent. Alternatively, the barrier panels can be kept in the lowered position during normal operation and raised after the debris flow is intercepted for easy dredging. Furthermore, multiple barrier panels are spaced along the length of the debris flow channel. This allows for tiered interception and energy dissipation of the debris flow, improving the interception effect and dissipating its impact energy.

Claims

1. A method for intercepting and clearing debris flows, characterized in that an integral, plate-shaped retaining structure is used within the debris flow channel to intercept and dissipate the debris flow, wherein... The barrier components are designed to be movable up and down. When a debris flow occurs, the barrier components are controlled to be at the bottom of the gully to intercept and dissipate the debris flow. After the debris flow stops, the barrier components are controlled to move up and out of the bottom of the gully so that the gully can be dredged. This method relies on a debris flow interception device installed in the debris flow channel. The debris flow interception device includes two interception plates that are installed along the cross-section of the debris flow channel. The interception plates are arranged opposite each other, and the outer side of the interception plates can slide up and down on the slide rails set on the side walls of the debris flow channel. The side walls of the debris flow channel are also equipped with lifting control devices for each of the two interception plates.

2. The debris flow interception and dredging method as described in claim 1, characterized in that, The debris flow channel is located within the debris flow circulation zone.

3. The debris flow interception and dredging method as described in claim 2, characterized in that, Highways are also built on both sides of the debris flow channel; The barrier components are multiple components spaced apart along the length of the debris flow channel.

4. The debris flow interception and dredging method as described in claim 2, characterized in that, After removing and dismantling the barrier components from the bottom of the ditch, the silt was removed. Dredging methods include using water flow to gradually disperse the silt and / or using excavation to remove the silt.

5. The debris flow interception and dredging method as described in claim 1, characterized in that, The inner sides of the guardrails are mating surfaces, and the mating surfaces of the two guardrails can mate with each other after the guardrails slide to the lower end of the slide rail.

6. The debris flow interception and dredging method as described in claim 5, characterized in that, The barrier plate has a mating structure on its mating surface. The mating structure is either a protruding insertion protrusion or a groove that can match the insertion protrusion.

7. The debris flow interception and dredging method as described in claim 6, characterized in that, The bottom of the two barrier panels has an upward-recessed drainage culvert.

8. The debris flow interception and dredging method as described in claim 1, characterized in that, The lower half of the joint side of the two guardrails is made of elastic material.

9. The debris flow interception and dredging method as described in claim 8, characterized in that, Elastic metal strips are embedded vertically inside the elastic material. These elastic metal strips are multiple strips arranged at intervals in the horizontal direction. The upper ends of the elastic metal strips are fixed to the barrier plate body, and the flexibility of the elastic metal strips gradually increases from top to bottom.

10. The debris flow interception and dredging method as described in claim 1, characterized in that, It also includes a control center, which is connected to the rainfall monitoring system on one end and to the winch on the other.

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