Novel retractable rubber spur dike and design method of structure thereof

Abstract

The invention discloses a novel retractable rubber spur dike and a design method of a structure of the novel retractable rubber spur dike, and belongs to the technical field of dike design. The spur dike comprises a rubber dike bag, a base guide rail system and a rapid folding and unfolding system. The rubber dam bag is provided with a dam head and a dam root, the outside of a dam body is corrugated, and a plurality of retractable holes are symmetrically formed in the left and right dam bodies; the base guide rail system comprises guide rails and sliding blocks, the sliding blocks and rubber dam bags are arranged at the top ends of the guide rails, the dam root side is anchored to an embankment, and pulleys are arranged on the dam head side. The rapid winding and unwinding system comprises a pulley, a driving system and a dragging rope, the driving system is provided with a driving motor and a driving wheel, the dragging rope penetrates through the winding and unwinding hole from the dam head side to the dam root side and is fixed, the driving system is arranged at the dam root end, and the dragging rope on the dam head side is connected back to the driving system through the pulley in a steering mode; the rubber dam bag is made of composite materials, the driving motor drives the driving wheel to pull the guide rope to drive the dam bag to move, and automatic retracting and releasing of the spur dike are achieved. The spur dike structure can flexibly adjust the form according to the water flow condition, is low in manufacturing cost and convenient to construct, and is suitable for water conservancy projects and other scenes.

Description

Technical Field

[0001] The present invention relates to a novel retractable rubber groyne and a design method for its structure, belonging to the technical field of dam design. Background Art

[0002] The functions and purposes of groynes and dams are completely different, and their structures also vary greatly. Dams are mainly used for full-section water retention, regulating river flow, storing fresh water, and generating electricity using hydropower. Groyne does not block the river channel and is generally set on one side (or both sides) of the river channel, playing a role in locally blocking water or guiding and controlling the water flow, for local bank protection, reducing shoreline erosion, or guiding the water flow to scour the waterway. As a typical river regulation structure, the root of the groyne is fixedly connected to the river bank, and the dam body extends towards the center of the river channel, with a planar shape distributed in a "T" shape, hence the name. Groyne is usually arranged in the cross-section of a river or stream. In river regulation projects, groyne is one of the most widely used structures; in flood control projects, it can be used to protect the river bank from scouring; in waterway regulation projects, it can be used to narrow the river channel, deepen the waterway, and "constrict the water flow to scour the sand". Existing groynes are mainly classified by materials, including concrete groynes, riprap groynes, fascine groynes, etc.

[0003] Although traditional groynes (such as concrete groynes, riprap groynes, etc.) are widely used in river regulation, their constituent materials are mainly rigid materials such as concrete and riprap, with high costs and cannot be moved after construction. In reality, it is often necessary to flexibly control the water flow according to different functions and water flow conditions. For example, in some river channels with small water flow, it is necessary to increase water retention and enhance the effect of constricting the water flow to scour the sand; during periods of large water flow (such as flood seasons), it is necessary to reduce water blocking and lower the flood control risk. In some river channels with small water flow, it is necessary to reduce water retention; during periods of large water flow, it is necessary to increase water blocking and strengthen the diversion ability to deflect the main flow away from the river bank and protect the river bank from scouring. Obviously, fixed traditional concrete floor slabs and riprap groynes are difficult to flexibly meet various requirements. In short, traditional groynes still have the following technical bottlenecks: on the one hand, there is a lack of new materials. Currently, rubber materials mainly focus on the application of dams, and no rubber groyne structure with both stretchability and diversion has been developed. Moreover, traditional groynes have disadvantages such as high construction costs and inconvenient construction. On the other hand, the structure of traditional rigid groynes cannot be adjusted. Fixed to the riverbed, it cannot dynamically adjust its shape according to hydrological conditions, resulting in too short groynes during the dry season, poor effect of constricting the water flow to scour the sand; too long groynes during the flood season, serious water blocking, exacerbating local scouring or raising the upstream water level, increasing the flood control risk.

[0004] A rubber dam is a new type of flexible water-retaining structure. It utilizes a dam bag made of a high-strength rubber and fiber composite material, secured to a concrete base plate via an anchoring system to form a closed water-retaining structure. Compared to traditional rigid dams, rubber dams offer advantages such as lightweight construction, low cost, and eco-friendliness. They are widely used in flood control, irrigation, and landscape water storage. However, traditional rubber dams are bulky and have complex filling and drainage systems, making them difficult to quickly deploy and retract, thus hindering emergency response capabilities. Therefore, the present invention proposes a new retractable rubber groin dam structure. Summary of the Invention

[0005] In order to solve the above problems, the present invention proposes a novel retractable rubber groin and a design method for its structure, which can flexibly adjust the shape according to water flow conditions, has low cost and is easy to construct.

[0006] The technical solution adopted by the present invention to solve the technical problem is: In a first aspect, an embodiment of the present invention provides a novel retractable rubber groyne, comprising: A rubber dam bag, comprising a dam head and a dam root, with the exterior of the dam body being arranged in a corrugated shape and a plurality of retractable holes being symmetrically provided on the left and right sides of the dam body; The base rail system includes a guide rail and a slider. The top of the guide rail is provided with a slider. The top of the slider is provided with a rubber dam bag. The dam root side of the guide rail is anchored to the embankment, and the dam head side is provided with a pulley. A rapid retraction and deployment system includes a pulley, a drive system, and a towing rope. The drive system includes a drive motor and a drive wheel installed on the embankment. The towing rope passes through the retraction and deployment holes on the dam body from the dam head side to the dam base side and is fixed to each retraction and deployment hole. The drive system is installed at one end of the dam base. The towing rope on the dam head side is turned by the pulley and then connected back to the drive system. Among them, the rubber dam bag is made of high-strength rubber and fiber composite materials. The pulling rope is connected to the drive system through a rapid retraction system. The driving motor drives the driving wheel to pull the pulling rope, and then drives the rubber dam bag connected to it to move, realizing the retraction and expansion of the rubber groin, thereby completing the automatic release and retraction of the rubber dam bag.

[0007] As a possible implementation of this embodiment, the corrugated shape of the outer portion of the dam body of the rubber dam bag is designed through a cooperative deformation mechanism between adjacent corrugations to achieve more efficient folding and stretching functions.

[0008] As a possible implementation of this embodiment, the dam root is fixedly connected to the embankment through an anchoring system to ensure the stability of the rubber dam bag during the retraction and deployment process.

[0009] As a possible implementation of this embodiment, the guide rails of the base guide rail system are made of corrosion-resistant, high-strength materials to adapt to long-term underwater working environments.

[0010] As a possible implementation of this embodiment, the pulling rope is made of high-strength, wear-resistant material to ensure reliability and safety during long-term use.

[0011] As a possible implementation of this embodiment, the corrugated structural parameters of the rubber dam bag are: wavelength 250±50mm, wave height 60±10mm, wave height to wavelength ratio (H / L) of 0.24-0.3, single corrugation pitch 300mm, folding compression ratio ≥65%, length ratio of stretched state to contracted state ≥2.5:1; corrugated side wall inclination angle 30°-45°, adjacent corrugations are connected by an arc transition of R=15-25mm, and the maximum stress concentration factor ≤1.3.

[0012] As a possible implementation of this embodiment, the drive motor of the rapid retraction and release system is a variable frequency speed-regulating three-phase asynchronous motor with a rated power of 7.5-15kW, equipped with a gear reducer (reduction ratio 1:5-1:8) and a wire rope drum with a diameter of 400-600mm. The pulling rope is sequentially inserted into the retraction and release holes on the dam head side and is fixed by crimping with an aluminum alloy ring. The inner wall of the ring is processed with anti-slip teeth with a tooth depth of 0.5-1.0mm. The pulling rope on the dam head side returns to the drum after being deflected by the pulley, forming a closed-loop transmission structure. The actual power calculation formula of the drive motor is: , in, is the total load force of friction, water flow resistance and dam body weight, v is the linear velocity of the pulling rope, that is, the expansion and contraction speed of the dam body; It is the mechanical efficiency, usually ranging from 0.7 to 0.9.

[0013] As a possible implementation method of this embodiment, the guide rail straightness error of the base guide rail system is ≤0.5mm / m, the horizontality error is ≤0.3mm / m, and the guide rail length is determined according to the maximum design length of the dam body; a guide boss is provided on the bottom surface of the slider, and the clearance with the guide rail groove is ≤0.1mm, and a limit switch is installed on the side of the slider for detecting the extreme expansion and contraction position of the dam body; the guide rail dam root end is anchored to the embankment through 4 rows of Φ25mm embedded steel bars, and the anchoring depth is ≥1.2m. A cast steel pulley with a diameter of ≥500mm is provided at the dam head end, and the vertical distance between the pulley axis and the top surface of the guide rail is 0.8-1.0 times the height of the dam body.

[0014] As a possible implementation of this embodiment, the novel retractable rubber groin further includes an intelligent control system, which includes a water level sensor, a PLC controller, and a remote monitoring module. The intelligent control system can automatically adjust the rotation direction of the drive motor according to water flow conditions, thereby controlling the length of the rubber groin bag to be released and retracted.

[0015] As a possible implementation of this embodiment, the intelligent control system includes: Water level sensor (accuracy ±10mm), real-time collection of river water level data; Tension sensor (accuracy ±1%FS) to monitor the change of the pulling rope tension; Displacement encoder (resolution 0.1mm) to record the expansion and contraction displacement of the dam body; PLC controller with built-in fuzzy control algorithm, automatically triggering dam retraction and deployment instructions based on water level thresholds; The remote monitoring module supports real-time monitoring of the dam status via mobile APP and PC, and has a fault warning function.

[0016] As a possible implementation of this embodiment, the preparation process of the high-strength rubber and fiber composite material includes: The natural rubber or EPDM rubber is plasticized in an open mill, sulfur, accelerator, antioxidant and other additives are added, and the mixture is mixed evenly; The polyester fiber or aramid fiber is made into a reinforcement layer by an orthogonal weaving process and immersed in rubber latex for pre-preg treatment; The rubber matrix and the reinforcement layer are compounded through hot pressing vulcanization process (temperature 140-160℃, pressure 8-12MPa) to produce dam bag sheet with thickness of 8-15mm; The plate is compression molded to form a corrugated dam structure, with a molding temperature of 150-170°C and a holding time of 20-30 minutes.

[0017] As a possible implementation of this embodiment, the dam head end of the rubber dam bag is a NACA0012 airfoil streamline surface with a leading edge radius of 100-150 mm, a trailing edge angle ≤5°, and a water-facing surface roughness Ra ≤12.5 μm; the dam root end is anchored to the embankment through an embedded steel plate with a thickness of ≥20 mm. The anchor bolts are M24 stainless steel bolts with a spacing of 200-250 mm, an anchor length ≥1.5 m, and a pull-out test bearing capacity ≥80 kN / bolt.

[0018] As a possible implementation of this embodiment, the spacing between the retractable holes and the corrugation pitch is in a ratio of 1:2, the diameter of the retractable holes is 12 mm, the inner edge is inlaid with a tin bronze wear-resistant bushing (thickness 2-3 mm), the surface of the bushing is processed with a spiral oil groove (groove depth 0.3-0.5 mm, pitch 5-8 mm), and the groove is filled with molybdenum disulfide lithium-based grease; the longitudinal spacing between adjacent retractable holes is 150 mm, distributed in the middle 1 / 3 area along the height direction of the dam body, and the fitting clearance between the hole position and the towing rope is 4 mm, which meets the H9 / f9 tolerance standard.

[0019] In a second aspect, an embodiment of the present invention provides a design method for a novel retractable rubber groyne structure, comprising the following steps: Step 1: Measure the hydrological data parameters of river flow, flow velocity, and water level fluctuation to determine the design length range of the spur dike (Lmin-Lmax) and the expansion and contraction speed requirements (≥0.3m / s during flood season, ≤0.1m / s during flat season); Step 2: Based on the wavelength distribution of the water flow, select wavelength L = 250 mm, wave height H = 60 mm, calculate H / L = 0.24, determine the folding compression ratio ≥ 65%, and optimize the corrugated sidewall inclination angle and transition arc radius through finite element simulation; Step 3: Select a rubber-fiber composite material with a tensile strength of ≥18 MPa and a fiber volume content of 25%-30%, and ensure an interface bonding strength of ≥3 MPa through a hot pressing vulcanization process; Step 4: Calculate the drive motor power and select the matching towing rope and pulley specifications based on the dam body's deadweight, water flow resistance, and friction resistance. The calculation formula for the drive motor power is: ,in, is the total load force of friction, water flow resistance and dam body weight, v is the linear velocity of the pulling rope, that is, the expansion and contraction speed of the dam body; is the mechanical efficiency, usually ranging from 0.7 to 0.9; Step 5: Establish a water level-dam length mapping relationship, set the dam body to fully extend during the dry season (water level ≤ H1) and fully contract during the flood season (water level > H2), and adjust the intermediate water level proportionally, and achieve automatic control through the PLC program.

[0020] As a possible implementation of this embodiment, the finite element simulation step includes: Establish a three-dimensional model of the corrugated dam body, using tetrahedral unit meshing with a mesh size of ≤20mm; Apply water flow load (flow rate 0-10m / s) and pull rope tension (0-200kN) to conduct static and dynamic analysis; The optimization goal is to set the maximum stress ≤ 12MPa and the maximum deformation ≤ L / 100 to ensure the safety and reliability of the dam under extreme working conditions; The interaction between the dam and the water flow was analyzed through fluid-structure interaction simulation (FSI), verifying the drag reduction effect of the corrugated structure (drag coefficient reduction ≥ 20%).

[0021] The technical solution of the embodiment of the present invention can have the following beneficial effects: The present invention can flexibly adjust the length of the spur dike according to the water flow conditions, so as to lengthen the spur dike during the dry season, thereby enhancing the water confinement and sand attack effect; shorten the spur dike during the flood season, thereby preventing local scouring or raising the upstream water level caused by severe water obstruction, thereby reducing the risk of flood control; the present invention uses high-strength rubber and fiber composite materials to make the dam body, which has the advantages of low cost, convenient construction, and eco-friendliness; the present invention adopts a corrugated dam body design, and through the cooperative deformation mechanism between adjacent corrugations, it achieves more efficient folding and stretching functions, thereby improving the stability and reliability of the dam body during the retraction and extension process. The novel retractable rubber spur dike structural design of the present invention has the advantages of simple structure, low cost, convenient construction, and the ability to flexibly adjust the shape according to water flow conditions, and can be widely used in river regulation projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 1 is a schematic structural diagram of a novel retractable rubber groin according to an exemplary embodiment; Figure 2 is a three-dimensional simulation diagram of a new type of retractable rubber groin according to an exemplary embodiment; Figure 3 is a three-dimensional simulation diagram of a corrugated rubber dam bag according to an exemplary embodiment; Figure 4 is a three-dimensional simulation diagram of a base rail system and a rapid retracting and extending system according to an exemplary embodiment; Figure 5 is a three-dimensional simulation diagram of a rapid retractable system according to an exemplary embodiment; Figure 6 This is a flow chart of a design method for a novel retractable rubber groyne structure according to an exemplary embodiment; In the figure: 1. Rubber dam bag; 2. Guide rail; 3. Slider; 4. Pulley; 5. Driving wheel; 6. Driving motor; 7. Pulling rope; 8. Dam head; 9. Dam root; 10. Retraction hole. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments: In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings. The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. In addition, the present invention may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. It should be noted that the components illustrated in the accompanying drawings are not necessarily drawn to scale. The present invention omits descriptions of well-known components and processing technologies and processes to avoid unnecessary limitations on the present invention.

[0024] like Figures 1 to 5 As shown, an embodiment of the present invention provides a novel retractable rubber groin, comprising: A rubber dam bag 1, comprising a dam head 8 and a dam base 9, the exterior of the dam body being arranged in a corrugated shape, and a plurality of retractable holes 10 being symmetrically provided on the left and right sides of the dam body; The base rail system includes a guide rail 2 and a slider 3. The slider 3 is provided at the top of the guide rail 2. The rubber dam bag 1 is provided at the top of the slider 3. The dam root side of the guide rail 2 is anchored to the embankment, and the dam head side is provided with a pulley 4. A rapid retraction and deployment system includes a pulley 4, a drive system, and a towing rope 7. The drive system includes a drive motor 6 and a drive wheel 5 installed on the embankment. The towing rope 7 passes through the retraction and deployment holes 10 on the dam body from the dam head side to the dam base side and is fixed to each retraction and deployment hole 10. The drive system is installed at one end of the dam base. One end of the towing rope 7 on the dam head side passes through the pulley 4, turns, and is connected back to the drive system. Among them, the rubber dam bag 1 is made of high-strength rubber and fiber composite material. The pulling rope 7 is connected to the drive system through a rapid retraction system. The driving motor 6 drives the driving wheel 5 to pull the pulling rope 7, thereby driving the rubber dam bag 1 connected thereto to move, realizing the retraction and expansion of the rubber groin, thereby completing the automatic release and retraction of the rubber dam bag 1.

[0025] As a possible implementation of this embodiment, the corrugated shape of the outer portion of the dam body of the rubber dam bag 1 is designed through a cooperative deformation mechanism between adjacent corrugations to achieve more efficient folding and stretching functions.

[0026] As a possible implementation of this embodiment, the dam root 9 is fixedly connected to the embankment through an anchoring system to ensure the stability of the rubber dam bag 1 during the retraction and deployment process.

[0027] As a possible implementation of this embodiment, the guide rail 2 of the base guide rail system is made of corrosion-resistant, high-strength material to adapt to long-term underwater working environments. The guide rail 2 is made of aluminum alloy and can be coated with an anodizing process, for example, to enhance corrosion resistance.

[0028] As a possible implementation of this embodiment, the pulling rope 7 is made of high-strength, wear-resistant material to ensure reliability and safety during long-term use. The pulling rope 7 can be made of ultra-high molecular weight polyethylene braided rope with a diameter of 8 mm and a tensile strength of ≥200 MPa.

[0029] As a possible implementation of this embodiment, the corrugated structural parameters of the rubber dam bag 1 are: wavelength 250±50mm, wave height 60±10mm, wave height to wavelength ratio (H / L) of 0.24-0.3, single corrugation pitch 300mm, folding compression ratio ≥65%, length ratio of stretched state to contracted state ≥2.5:1; corrugated side wall inclination angle 30°-45°, adjacent corrugations are connected by an arc transition with R=15-25mm, and maximum stress concentration factor ≤1.3.

[0030] As a possible implementation of this embodiment, the drive motor 6 of the rapid retraction and release system is a variable frequency speed-regulating three-phase asynchronous motor with a rated power of 7.5-15kW, equipped with a gear reducer (reduction ratio 1:5-1:8) and a wire rope drum with a diameter of 400-600mm; the pulling rope 7 is sequentially inserted into the retraction and release hole 10 on the dam head side and fixed by crimping with an aluminum alloy ring. The inner wall of the ring is processed with anti-slip tooth patterns with a tooth depth of 0.5-1.0mm; the pulling rope 7 on the dam head side returns to the drum after being deflected by the pulley 4, forming a closed-loop transmission structure. The actual power calculation formula of the drive motor 6 is: , in, is the total load force of friction, water flow resistance and dam body weight, v is the linear velocity of the pulling rope, that is, the expansion and contraction speed of the dam body; It is the mechanical efficiency, usually ranging from 0.7 to 0.9.

[0031] As a possible implementation method of this embodiment, the straightness error of the guide rail 2 of the base guide rail system is ≤0.5mm / m, the horizontality error is ≤0.3mm / m, and the guide rail length is determined according to the maximum design length of the dam body; a guide boss is provided on the bottom surface of the slider 3, and the clearance with the guide rail groove is ≤0.1mm, and a limit switch is installed on the side of the slider 3 for detecting the extreme expansion and contraction position of the dam body; the dam root end of the guide rail 2 is anchored to the embankment through 4 rows of Φ25mm embedded steel bars, and the anchoring depth is ≥1.2m. A cast steel pulley with a diameter of ≥500mm is provided at the dam head 8 end, and the vertical distance between the axis of the pulley 4 and the top surface of the guide rail 2 is 0.8-1.0 times the height of the dam body.

[0032] As a possible implementation of this embodiment, the novel retractable rubber groyne system also includes an intelligent control system comprising a water level sensor, a PLC controller, and a remote monitoring module. This intelligent control system automatically adjusts the rotation direction of the drive motor 6 according to water flow conditions, thereby controlling the deployment and retraction lengths of the rubber groyne bag 1. The intelligent control system has a response time of ≤10 seconds, enabling real-time response to sudden flooding events. This improves efficiency by 90% compared to manual operation and reduces the risk of human error.

[0033] As a possible implementation of this embodiment, the intelligent control system includes: Water level sensor (accuracy ±10mm), real-time collection of river water level data; Tension sensor (accuracy ±1%FS) to monitor the change of the pulling rope tension; Displacement encoder (resolution 0.1mm) to record the expansion and contraction displacement of the dam body; PLC controller with built-in fuzzy control algorithm, automatically triggering dam retraction and deployment instructions based on water level thresholds; The remote monitoring module supports real-time monitoring of the dam status via mobile APP and PC, and has a fault warning function.

[0034] As a possible implementation of this embodiment, the preparation process of the high-strength rubber and fiber composite material includes: The natural rubber or EPDM rubber is plasticized in an open mill, sulfur, accelerator, antioxidant and other additives are added, and the mixture is mixed evenly; The polyester fiber or aramid fiber is made into a reinforcement layer by an orthogonal weaving process and immersed in rubber latex for pre-preg treatment; The rubber matrix and the reinforcement layer are compounded through hot pressing vulcanization process (temperature 140-160℃, pressure 8-12MPa) to produce dam bag sheet with thickness of 8-15mm; The plate is compression molded to form a corrugated dam structure, with a molding temperature of 150-170°C and a holding time of 20-30 minutes.

[0035] As a possible implementation of this embodiment, the end of the dam head 8 of the rubber dam bag 1 is a NACA0012 airfoil streamline surface with a leading edge radius of 100-150 mm, a trailing edge angle ≤5°, and a water-facing surface roughness Ra ≤12.5 μm; the dam root end is anchored to the embankment through an embedded steel plate with a thickness of ≥20 mm. The anchor bolts are M24 stainless steel bolts with a spacing of 200-250 mm, an anchor length ≥1.5 m, and a pull-out test bearing capacity ≥80 kN / bolt.

[0036] As a possible implementation of this embodiment, the spacing between the retracting holes 10 and the corrugation pitch is in a ratio of 1:2. The diameter of the retracting holes 10 is 12 mm, which is 1.5 times the rope diameter to reduce wear. The inner edge is inlaid with a tin bronze wear-resistant bushing (thickness 2-3 mm), and the surface of the bushing is processed with a spiral oil groove (groove depth 0.3-0.5 mm, pitch 5-8 mm), and the groove is filled with molybdenum disulfide lithium-based grease. The longitudinal spacing between adjacent retracting holes is 150 mm, distributed in the middle 1 / 3 area along the height direction of the dam body, and the fitting clearance between the hole position and the towing rope 7 is 4 mm, which meets the H9 / f9 tolerance standard.

[0037] The spur dam of this invention utilizes a high-strength rubber and fiber composite material as the primary dam body. This composite material not only retains the inherent elasticity and toughness of rubber, but also significantly enhances its tensile strength and durability through fiber reinforcement. Compared to traditional block stone spur dams, this composite material offers significant economic advantages. Furthermore, the use of flexible materials enables the dam body to effectively absorb and dissipate kinetic energy. Moderate elastic deformation avoids the localized stress concentration common in traditional rigid structures, significantly extending the structure's service life.

[0038] The spur dike of the present invention can adjust the length of the spur dike according to actual water flow conditions. A guide rail is arranged on the bottom surface of the dam body, and a towing rope and a driving system are arranged on the side surface. The base guide rail is connected to the dam body, so that the dam bag can be moved forward and backward; the towing rope of the rapid retraction system is connected to the dam bag and the driving system, and the driving motor can realize automatic release and retraction of the dam bag by changing the rotation direction of the driving wheel, so that the spur dike can be lengthened in the dry season to enhance the water confinement and sand attack effect, and the spur dike can be shortened in the flood season to prevent local scouring or rising upstream water level caused by severe water obstruction. The invention is not only highly efficient but also flexible.

[0039] This invention utilizes an innovative corrugated structure in the dam's morphological design. This corrugated design achieves more efficient folding and extension through the coordinated deformation of adjacent corrugations. When length adjustment is required, the corrugated structure, combined with a rapid retraction and extension system, can fold and unfold in an orderly manner, like an accordion. This unique deformation method significantly improves the stability and reliability of the dam's retraction and extension process.

[0040] like Figure 6 As shown, an embodiment of the present invention provides a novel design method for a retractable rubber groyne structure, comprising the following steps: Step 1: Measure the hydrological data parameters of river flow, flow velocity, and water level fluctuation to determine the design length range of the spur dike (minimum spur dike length Lmin - maximum spur dike length Lmax) and the expansion and contraction speed requirements (≥0.3m / s during flood season, ≤0.1m / s during flat season); Step 2: Based on the wavelength distribution of the water flow, select wavelength L = 250 mm, wave height H = 60 mm, calculate H / L = 0.24, determine the folding compression ratio ≥ 65%, and optimize the corrugated sidewall inclination angle and transition arc radius through finite element simulation; Step 3: Select a rubber-fiber composite material with a tensile strength of ≥18 MPa and a fiber volume content of 25%-30%, and ensure an interface bonding strength of ≥3 MPa through a hot pressing vulcanization process; Step 4: Calculate the drive motor power and select the matching towing rope and pulley specifications based on the dam body's deadweight, water flow resistance, and friction resistance. The calculation formula for the drive motor power is: ,in, is the total load force of friction, water flow resistance and dam body weight, v is the linear velocity of the pulling rope, that is, the expansion and contraction speed of the dam body; is the mechanical efficiency, usually ranging from 0.7 to 0.9; Step 5: Establish a water level-dam length mapping relationship, set the dam body to fully extend during the dry season (water level ≤ H1) and fully contract during the flood season (water level > H2), and adjust the intermediate water level proportionally, and achieve automatic control through the PLC program.

[0041] The dam body of this invention adopts a flexible structure, reducing interference with riverbed sediments and aquatic life. The corrugated design can reduce water vortex intensity by 40% and reduce riverbed scour depth by 30%. The dam body length can be infinitely adjusted within the Lmin-Lmax range to adapt to seasonal water flow changes. This improves water confinement and sediment control efficiency by 40% and reduces the risk of water obstruction during floods by 50%.

[0042] As a possible implementation of this embodiment, the finite element simulation step includes: Establish a three-dimensional model of the corrugated dam body, using tetrahedral unit meshing with a mesh size of ≤20mm; Apply water flow load (flow rate 0-10m / s) and pull rope tension (0-200kN) to conduct static and dynamic analysis; The optimization goal is to set the maximum stress ≤ 12MPa and the maximum deformation ≤ L / 100 to ensure the safety and reliability of the dam under extreme working conditions; The interaction between the dam and the water flow was analyzed through fluid-structure interaction simulation (FSI), verifying the drag reduction effect of the corrugated structure (drag coefficient reduction ≥ 20%).

[0043] The working principle of the novel retractable rubber groin dam of the present invention is as follows: During installation, the rubber dam bag 1 is first mounted on the guide rail slider 3, the towing rope 7 is connected to the pulley 4 and the drive wheel 5, and the drive motor 6 is started to rotate the drive wheel 5, so that the towing rope 7 on the side close to the dam body moves from the base of the dam to the end of the pulley 4 until it moves near the pulley 4, and the dam bag of the rubber spur dam is laid. When the rubber spur dam needs to be retracted after drainage, the drive motor 6 changes the rotation direction of the drive wheel 5, so that the towing rope 7 on the side close to the dam body moves from the pulley 4 to the base of the dam until it moves near the drive wheel 5, and the rubber spur dam bag is successfully retracted. The corrugated design of the rubber dam bag 1 can improve the shrinkage efficiency.

[0044] The driving system changes the direction of rotation and pulls the pulling rope 7 to achieve the expansion and contraction of the rubber dam bag 1. The load composition of the driving motor 6 includes friction, water flow resistance, and the weight of the dam body. The actual power of the driving motor 6 is (v is the linear velocity of the pulling rope, i.e. the expansion and contraction speed of the dam body; =Mechanical efficiency (typically 0.7-0.9) can be appropriately increased to 20-30% redundancy. A frequency converter can be used to control motor speed, achieving high speed response during flood seasons and low speed during flat seasons for energy conservation.

[0045] The rubber grommets can adjust the dam length through a rapid retraction and deployment system to adapt to seasonal water level changes. The dam length can be increased during the dry season to enhance water confinement and sediment attack; the dam length can be reduced during the flood season to prevent local scouring or raising of upstream water levels caused by severe water obstruction.

[0046] Compared with the prior art, the present invention has the following characteristics: (1) The novel retractable rubber groin of the present invention uses a high-strength rubber and fiber composite material as the main material of the dam body. This composite material not only maintains the inherent elasticity and toughness characteristics of the rubber material, but also significantly improves the tensile strength and durability of the material through fiber reinforcement. Compared with traditional block stone groin, this composite material has obvious economic advantages. At the same time, the use of flexible materials enables the dam body to effectively absorb and dissipate the kinetic energy of water, and avoids the local stress concentration problem common in traditional rigid structures through moderate elastic deformation, thereby greatly improving the service life of the structure.

[0047] (2) The new retractable rubber groin dam of the present invention adopts an innovative corrugated structure in the design of the dam body. This corrugated design realizes more efficient folding and stretching functions through the cooperative deformation mechanism between adjacent corrugations. When the length needs to be adjusted, the corrugated structure can be folded or unfolded in an orderly manner like an accordion by combining the filling and drainage system with the rapid retraction and expansion system. This unique deformation method greatly improves the stability and reliability of the dam body retraction process. The basic shape is as follows Figure 2 shown.

[0048] (3) The new retractable rubber groin dam of the present invention has a base rail system and a quick retractable system that are interconnected and work together to achieve the expansion and contraction of the rubber groin dam body and the retraction and expansion of the dam bag. The basic shape is as follows: Figure 3 shown.

[0049] (4) Compared with traditional block stone groynes, this new retractable rubber groyne has the advantages of high flexibility, low cost, and convenient construction. The new rubber groyne is composed of a bottom guide rail system and a rapid retraction system to achieve the expansion and contraction of the dam body and the retraction and deployment of the dam bag. Compared with the traditional immovable groyne, the flexibility is greatly enhanced. In addition, the flexible rubber material dam body is cheaper and more convenient to construct.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A new type of retractable rubber groin, characterized in that: include: A rubber dam bag, comprising a dam head and a dam root, with the exterior of the dam body being arranged in a corrugated shape and a plurality of retractable holes being symmetrically provided on the left and right sides of the dam body; The base rail system includes a guide rail and a slider. The top of the guide rail is provided with a slider. The top of the slider is provided with a rubber dam bag. The dam root side of the guide rail is anchored to the embankment, and the dam head side is provided with a pulley. A rapid retraction and deployment system includes a pulley, a drive system, and a towing rope. The drive system includes a drive motor and a drive wheel installed on the embankment. The towing rope passes through the retraction and deployment holes on the dam body from the dam head side to the dam base side and is fixed to each retraction and deployment hole. The drive system is installed at one end of the dam base. The towing rope on the dam head side is turned by the pulley and then connected back to the drive system. Among them, the rubber dam bag is made of high-strength rubber and fiber composite materials. The pulling rope is connected to the drive system through a rapid retraction system. The driving motor drives the driving wheel to pull the pulling rope, and then drives the rubber dam bag connected to it to move, realizing the retraction and expansion of the rubber groin, thereby completing the automatic release and retraction of the rubber dam bag.

2. The novel retractable rubber groin according to claim 1 is characterized in that: The ratio of the retractable hole spacing to the corrugation pitch is 1:2, and the hole diameter is 12 mm.

3. The novel retractable rubber groin according to claim 2 is characterized in that: The corrugated structural parameters of the rubber dam bag are: wavelength 250±50mm, wave height 60±10mm, wave height to wavelength ratio 0.24-0.3, single corrugation pitch 300mm, folding compression rate ≥65%, length ratio of stretched state to contracted state ≥2.5:1; corrugated side wall inclination angle 30°-45°, adjacent corrugations are connected by R=15-25mm arc transition, and maximum stress concentration coefficient ≤1.

3.

4. The novel retractable rubber groyne according to claim 1, characterized in that: The driving motor of the rapid retraction and release system is a variable frequency speed-regulating three-phase asynchronous motor with a rated power of 7.5-15kW, equipped with a gear reducer and a wire rope drum with a diameter of 400-600mm. The pulling rope is sequentially inserted into the retraction and release holes on the dam head side and is fixed by crimping with an aluminum alloy ring. The inner wall of the ring is processed with anti-slip teeth with a tooth depth of 0.5-1.0mm. The pulling rope on the dam head side returns to the drum after being deflected by the pulley, forming a closed-loop transmission structure. The actual power calculation formula of the driving motor is: in, is the total load force of friction, water flow resistance and dam body weight, v is the linear velocity of the pulling rope, that is, the expansion and contraction speed of the dam body; For mechanical efficiency.

5. The novel retractable rubber groyne according to claim 1, characterized in that: The guide rail straightness error of the base guide rail system is ≤0.5mm / m, the horizontality error is ≤0.3mm / m, and the guide rail length is determined according to the maximum design length of the dam body; a guide boss is provided on the bottom surface of the slider, and the clearance with the guide rail groove is ≤0.1mm. A limit switch is installed on the side of the slider to detect the extreme expansion and contraction position of the dam body; the root end of the guide rail is anchored to the embankment through 4 rows of Φ25mm embedded steel bars, the anchoring depth is ≥1.2m, and a cast steel pulley with a diameter of ≥500mm is provided at the dam head end, and the vertical distance between the pulley axis and the top surface of the guide rail is 0.8-1.0 times the height of the dam body.

6. A novel retractable rubber groin according to any one of claims 1 to 5, characterized in that: It also includes an intelligent control system, which includes a water level sensor, a PLC controller and a remote monitoring module, and can automatically adjust the rotation direction of the drive motor according to water flow conditions, thereby controlling the release and retraction length of the rubber dam bag.

7. A novel retractable rubber groin according to any one of claims 1 to 5, characterized in that: The preparation process of the high-strength rubber and fiber composite material includes: Plasticate natural rubber or EPDM rubber in an open mill, add sulfur, accelerator and antioxidant, and mix evenly; The polyester fiber or aramid fiber is made into a reinforcement layer by an orthogonal weaving process and immersed in rubber latex for pre-preg treatment; The rubber matrix and the reinforcement layer are compounded by hot pressing and vulcanization process to produce dam bag sheets with a thickness of 8-15mm; The plate is compression molded to form a corrugated dam structure, with a molding temperature of 150-170°C and a holding time of 20-30 minutes.

8. A novel retractable rubber groin according to any one of claims 1 to 5, characterized in that: The dam head end of the rubber dam bag is a NACA0012 airfoil streamlined surface with a leading edge radius of 100-150mm, a trailing edge angle ≤5°, and a water-facing surface roughness Ra≤12.5μm; the dam root end is anchored to the embankment through a pre-buried steel plate with a thickness of ≥20mm. The anchor bolts are M24 stainless steel bolts with a spacing of 200-250mm, an anchor length ≥1.5m, and a pull-out test bearing capacity ≥80kN / bolt.

9. A design method for a novel retractable rubber groyne structure according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Measure the hydrological data parameters of river flow, flow velocity and water level fluctuation to determine the design length range and expansion and contraction speed requirements of the spur dike; Step 2: Based on the wavelength distribution of the water flow, select the wavelength L = 250 mm, the wave height H = 60 mm, calculate H / L = 0.24, determine the folding compression ratio ≥ 65%, and optimize the corrugated side wall inclination angle and transition arc radius through finite element simulation; Step 3: Select a rubber-fiber composite material with a tensile strength of ≥18 MPa and a fiber volume content of 25%-30%, and ensure an interface bonding strength of ≥3 MPa through a hot pressing vulcanization process; Step 4: Calculate the drive motor power and select the matching towing rope and pulley specifications based on the dam body's deadweight, water flow resistance, and friction resistance. The calculation formula for the drive motor power is: ,in, is the total load force of friction, water flow resistance and dam body weight, v is the linear velocity of the pulling rope, that is, the expansion and contraction speed of the dam body; for mechanical efficiency; Step 5: Establish a water level-dam length mapping relationship, set the dam body to fully extend during the dry season and fully contract during the flood season, adjust the intermediate water level proportionally, and achieve automatic control through the PLC program.

10. The design method of a novel retractable rubber groyne structure according to claim 9, characterized in that: The steps of the finite element simulation include: Establish a three-dimensional model of the corrugated dam body, using tetrahedral unit meshing with a mesh size of ≤20mm; Apply water flow load and pull rope tension to conduct static and dynamic analysis; The optimization goal is to set the maximum stress ≤ 12MPa and the maximum deformation ≤ L / 100 to ensure the safety and reliability of the dam under extreme working conditions; The interaction between the dam and the water flow is analyzed through fluid-solid coupling simulation to verify the drag reduction effect of the corrugated structure.

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