Device for dissipating waves in lake

Abstract

The utility model relates to the technical field of wave dissipating devices, in particular to a device for dissipating waves in lakes. The device comprises a middle rib column, a double-layer wave dissipation plate, a rib plate and a fixed bottom plate, the wave dissipation plate is made of 304 stainless steel, and drainage holes are evenly distributed to disperse wave energy; the middle rib column is a hollow cylinder, is connected with the wave dissipation plates on the two sides and provides support; the rib plates and the fixed bottom plate are fixed on the precast concrete caisson through bolts, so that the stability of the device is ensured. Through the synergistic effect of the double-layer wave dissipation plate and the drainage holes, the wave height and wavelength can be reduced by 60%-70%, and the safety of aquatic plants and the embankment is effectively protected. The device has the advantages of firm structure, convenience in installation, eco-friendliness and the like, and is suitable for wave control of water areas such as lakes and reservoirs.

Description

Technical Field

[0001] This utility model relates to the field of wave-damping device technology, specifically a device for wave-damping in lakes. Background Technology

[0002] Waves are the primary driving force behind lake shore erosion. Due to the combined effects of waves and lake currents, especially near-shore breaking waves carrying sand and currents transporting sediment, some eroded sediment is dispersed and transported outwards, causing continuous scouring and retreat of the lake shoreline, threatening vegetation growth and dike safety. Therefore, it is necessary to implement wave-damping measures to reduce wave scouring and promote the formation of shallow areas in front of the dike. Among existing technologies, pile-type wave-damping technology can effectively block and disperse wave energy on the lake surface, reducing the impact of wind and waves on the shoreline of the test area.

[0003] Traditional pile-type wave-damping structures are mostly solid piles. Solid piles reflect wave energy, easily leading to secondary erosion. The wave-damping efficiency of traditional pile structures is only 40%-50%, and the maintenance cost is high. Given that traditional solid piles cannot achieve the desired effect in attenuating wind waves and wavelengths, there is an urgent need for a wave-damping device with better performance in lakeside wave-damping systems. This device would allow wind waves to gradually decrease in intensity before reaching the lakeshore, thereby protecting aquatic plants and animals and deeply purifying the lakeside waters. Utility Model Content

[0004] The problem to be solved is to provide a wave-dissipating device with better wave-dissipating effect for use in the wave-dissipating system of lakeside areas.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a device for wave damping in lakes, comprising a central rib column, a fixed base plate connected to the bottom of the central rib column, and symmetrical rib plate one and rib plate two connected to both sides of the central rib column, the rib plate one and rib plate two being coplanarly connected and their bottom surfaces being respectively connected to the fixed base plate; wave damping plate one and wave damping plate two are sandwiched between rib plate one and rib plate two, and wave damping plate one and wave damping plate two are symmetrically connected to the edge of the central rib column, the bottom of wave damping plate one and wave damping plate two being connected to the fixed base plate; wave damping plate one and wave damping plate two are regularly arranged with a number of drainage holes, the opening rate of the drainage holes of wave damping plate one and wave damping plate two is 30%-40%, and the ratio of the horizontal to vertical hole spacing between the drainage holes is 1:1 to 1:1.2.

[0006] Preferably, the drainage holes on wave-damping plate one and wave-damping plate two are distributed in a diamond shape.

[0007] Preferably, the middle rib is a hollow cylinder made of 304 stainless steel.

[0008] Preferably, both rib plate one and rib plate two are right-angled trapezoidal stainless steel plates, with the right-angled side of the right-angled trapezoidal stainless steel plate welded to the middle rib column, and the bottom surface of the right-angled trapezoidal stainless steel plate welded to the fixed base plate.

[0009] Preferably, the base plate is a shaped 304 stainless steel plate with evenly distributed end plate holes along its edges.

[0010] Preferably, the center-to-center distance between adjacent drainage holes in both the horizontal and vertical directions is 40mm, and the center-to-center distance between the bottom drainage hole and the fixed base plate is 110-140mm.

[0011] Preferably, the upper bottom width of rib one and rib two is less than half the lower bottom width, and the lower bottom width is less than half the height.

[0012] Preferably, both wave damping plate one and wave damping plate two are made of 304 stainless steel, and their height is the same as that of the middle rib.

[0013] Compared with existing technologies, this utility model provides a device for wave dissipation in lakes, which has the following beneficial effects: By setting up wave-dissipating plates on both sides and drainage holes in synergy, the wave height is reduced by 60%-70% (e.g., the wave height on the outer side is reduced from 0.67m to 0.20m on the inner side), achieving efficient wave dissipation, and the wavelength is shortened by more than 70% (e.g., the wave height on the outer side is reduced from 14.6m to 3.9m on the inner side). The drainage holes reduce water flow impact, protect the survival rate of submerged plants ≥95%, promote the natural formation of shallow beaches, and are beneficial to lakeside ecology. The right-angled trapezoidal design of the ribs and the connection between the fixed base plate and the caisson enhance the structural stability of the device, with a wind and wave impact resistance of ≥7 levels and a device tilt rate of <0.5%; all structures are made of 304 stainless steel, with a service life of ≥20 years, a maintenance-free period of more than 5 years, and strong weather resistance. The precast concrete caisson combined with the wave-dissipating device improves installation efficiency by 40%, and the construction cycle of a single set of devices is ≤0.5h, making construction faster. Attached Figure Description

[0014] Figure 1 This is the front view of the present invention;

[0015] Figure 2 This is a top view of the present invention;

[0016] Figure 3 This is a schematic diagram of the fixed base plate structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the rib plate structure of this utility model;

[0018] Explanation of reference numerals in the attached drawings: 1. Intermediate rib; 2. Wave damping plate one; 3. Wave damping plate two; 4. Drainage hole; 5. Rib one; 6. Fixed base plate; 61. End plate hole; 7. Rib two; 8. Precast concrete caisson. Detailed Implementation

[0019] The technical solutions of the present utility model will now be described with reference to the accompanying drawings in the embodiments of the present utility model:

[0020] To provide a wave-damping device with better wave-damping effect, as shown in the figure, this utility model provides a device for wave-damping in lakes, including a central rib column 1, which is a hollow cylinder made of 304 stainless steel as the core support of the device, connecting the wave-damping plates on both sides and transmitting the load. The hollow cylinder design reduces weight. The bottom of the central rib column 1 is connected to a fixed base plate 6, which is a special-shaped 304 stainless steel plate with evenly distributed end plate holes 61 on the edge. The end plate holes 61 are used to anchor the device to a precast concrete caisson 8, providing underwater foundation stability. The precast concrete caisson 8 is pre-embedded with U-shaped anchor bolts, serving as the underwater installation foundation for the wave-damping device to resist wave erosion. The central rib 1 is flanked by symmetrical ribs 5 and 7. Ribs 5 and 7 are coplanar and their bottom surfaces are connected to the fixed base plate 6. Wave-dissipating plates 2 and 3 are sandwiched between ribs 5 and 7, symmetrically connected to the edge of the central rib 1. Both wave-dissipating plates 2 and 3 are made of 304 stainless steel and have the same height as the central rib 1. The planes of wave-dissipating plates 2 and 3 are perpendicular to the planes of ribs 5 and 7. The bottoms of wave-dissipating plates 2 and 3 are connected to the fixed base plate 6. Each wave-dissipating plate 2 and 3 has a number of regularly arranged drainage holes 4. These evenly distributed drainage holes disperse wave kinetic energy and reduce water flow impact. The opening ratio of the drainage holes 4 of wave-damping plates 1 and 2 is 30%-40%, which is the ratio of the hole area to the wave-damping plate area; the horizontal and vertical hole spacing ratio between the drainage holes 4 is 1:1 to 1:1.2. Figure 1 The horizontal center-to-center distance between the drainage holes 4 is h3, and the vertical center-to-center distance between the drainage holes 4 is h2, with the ratio of h3 to h2 ranging from 1:1 to 1:1.2. Preferably, the drainage holes 4 on wave-damping plates 1 and 2 are arranged in a rhomboid pattern, with a center-to-center distance of 40mm between adjacent drainage holes 4 in both the horizontal and vertical directions. The center-to-center distance of the bottom drainage hole 4 from the fixed base plate 6 is 110-140mm. The drainage holes 4 form water flow channels, reducing pressure concentration on the plate surface while allowing some water flow to pass through to weaken wave energy, avoiding secondary impacts caused by reflected waves in traditional solid plates, and improving wave-damping efficiency.

[0021] Rib 1 (5) and rib 2 (7) are both right-angled trapezoidal stainless steel plates. The right-angled trapezoidal structure connects the intermediate rib column to the fixed base plate, enhancing the overall anti-overturning performance of the wave-damping device. The right-angled sides of the right-angled trapezoidal stainless steel plates are welded to the intermediate rib column 1, and the bottom surfaces are welded to the fixed base plate 6. The upper base width of rib 1 (5) and rib 2 (7) is less than half the lower base width, and the lower base width is less than half its height. Figure 4 As shown, L1 < 0.5L2, L2 < 0.5H1.

[0022] The connections between wave damping plate 1 (2), wave damping plate 2 (3), intermediate rib column 1, rib 1 (5), rib 2 (7), and fixed base plate 6 are all butt welded to enhance the stability of the device.

[0023] One embodiment of this utility model is as follows: Wave damping plate 2 and wave damping plate 3 are coplanarly arranged and both are made of 304 stainless steel plates. Wave damping plate 2 and wave damping plate 3 have the same structure. The height of wave damping plate 2 is H, which is 900mm in this embodiment. The width of wave damping plate 2 is L, which is 181mm in this embodiment. The wall thickness of wave damping plate 2 is m, which is 12mm in this embodiment. Circular drainage holes 4 are evenly distributed on wave damping plate 2 and wave damping plate 3. The radius of the drainage hole 4 is r1, which is 20mm in this embodiment. The center distance between adjacent drainage holes 4 in the horizontal direction is h3, which is 40mm. The center distance between adjacent drainage holes 4 in the vertical direction is h2, which is 40mm. The distance from the center of the bottom row of drainage holes 4 to the bottom is h, which is 128mm in this embodiment. The intermediate rib 1 is a hollow cylinder made of 304 stainless steel, with an inner diameter of d and an outer diameter of D. In this embodiment, d is 96 mm and D is 108 mm. The wall thickness of the intermediate rib 1 is 6 mm. The height of the intermediate rib 1 is the same as that of the wave damping plate 2, both being 900 mm. Wave damping plates 2 and 3 are symmetrically connected to both sides of the intermediate rib 1. Ribs 5 and 7 are right-angled trapezoidal plates made of 304 stainless steel, with a height of H1 (320 mm in this embodiment), a wall thickness of D1 (10 mm), an upper base width of L1 (60 mm), and a lower base width of L2 (146 mm). The right-angled sides of ribs 5 and 7 are symmetrically fixed to both sides of the intermediate rib 1. The bottom surfaces of ribs 5 and 7 are connected to the fixed base plate 6 to support the entire device and ensure stability. The fixed base plate 6 is a special-shaped steel plate made of 304 stainless steel with a thickness of c, c = 12mm, a length of a, a = 490mm, and a width of b, b = 380mm. The outer edge of the fixed base plate 6 has end plate holes 61 for placing M20 bolts so as to fix it to the precast concrete caisson 8 under the water surface.

[0024] The construction process for wave-damping devices is as follows:

[0025] (1) Precast concrete caisson 8: According to the project needs and site conditions, precast concrete caisson 8 is provided. M20 U-shaped anchor bolts are reserved on the concrete caisson for later installation and fixing of wave-damping devices.

[0026] (2) Hoisting of precast concrete caisson 8: Hoisting the precast concrete caisson 8 to the designated position;

[0027] (3) Wave damping device installation: The entire wave damping device is fixed to the precast concrete caisson 8 with bolts. The self-weight of the precast concrete caisson 8 and the anchor bolts resist the horizontal force of the waves and prevent the wave damping device from shifting. When the wave reaches the wave damping device, some of the energy is dispersed through the drainage hole 4, and the remaining energy is weakened by the reflection of the wave damping plate. The wave impact force is transmitted to the middle rib column 1 through the wave damping plate, and then dispersed to the fixed bottom plate 6 and the precast concrete caisson 8 through the rib plate to realize the downward transfer of load. The reduced waves gently push the water body, promote sediment deposition and plant growth, and restore the lake shore ecology.

[0028] In summary, this wave-damping device, with its robust and durable structural design and scientifically sound layout, effectively blocked and dispersed wave energy on the lake surface, significantly reducing the impact of wind and waves on the shoreline of the experimental area and providing favorable habitat conditions for the recovery of aquatic plants. On-site observation and monitoring data revealed a significant difference in wave size between the inner and outer sides after the installation of the wave-damping device, with a marked reduction and shortening of wave height and wavelength. Calculations show that the double-layered wave-damping device can reduce wind and waves by approximately 60% to 70%. Simultaneously, submerged plants and aquatic animals within the experimental area showed good growth, with virtually no mortality.

[0029]

[0030] This invention provides a device for wave dissipation in lakes. It comprises a double-layered wave-dissipating plate and ribs supported by a central rib column 1. The wave-dissipating plates are regularly spaced with drainage holes 4. The device is fixed to a precast concrete caisson 8, achieving efficient dispersion and absorption of wave energy. The wave-dissipating plates (2, 3) are made of 304 stainless steel, and the network arrangement of the drainage holes 4 significantly reduces wave height and wavelength. The right-angled trapezoidal design of the ribs (5, 7) enhances anti-overturning capability. The fixed base plate 6 is anchored to the precast concrete caisson 8 with M20 bolts, ensuring underwater stability. In practical applications, this device can still reduce the impact force by 70% under 7-8 level winds and waves, and the wave height in the inner water area remains stable below 0.20m, providing long-term protection for lake shore ecological restoration. Its modular structure and corrosion resistance make it suitable for wave control projects in lakes, reservoirs, and nearshore waters, with significant environmental and economic value.

[0031] The above embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A device for wave dissipation in lakes, characterized in that: Includes a central rib (1), the bottom of which is connected to a fixed base plate (6). Symmetrical rib plates one (5) and two (7) are connected to both sides of the central rib (1). Rib plates one (5) and two (7) are coplanarly connected, and the bottom surfaces of rib plates one (5) and two (7) are respectively connected to the fixed base plate (6). Wave-damping plates one (2) and two (3) are sandwiched between rib plates one (5) and two (7), and wave-damping plates one (2) and two (3) are respectively connected to the fixed base plate (6). 2) Wave damping plate 2 (3) is symmetrically connected to the edge of the middle rib column (1), and the bottom of wave damping plate 1 (2) and wave damping plate 2 (3) is connected to the fixed base plate (6); wave damping plate 1 (2) and wave damping plate 2 (3) are regularly arranged with several drainage holes (4), the opening rate of drainage holes (4) of wave damping plate 1 (2) and wave damping plate 2 (3) is 30%-40%, and the ratio of horizontal to vertical hole spacing between drainage holes (4) is 1:1 to 1:1.

2.

2. The device for wave dissipation in lakes according to claim 1, characterized in that: The drainage holes (4) on wave-damping plate 1 (2) and wave-damping plate 2 (3) are distributed in a diamond shape.

3. The device for lake wave reduction according to claim 1, characterized in that: The middle rib (1) is a hollow cylinder made of 304 stainless steel.

4. The device for wave dissipation in lakes according to claim 1, characterized in that: Rib 1 (5) and rib 2 (7) are both right-angled trapezoidal stainless steel plates. The right-angled side of the right-angled trapezoidal stainless steel plate is welded to the middle rib (1), and the bottom surface of the right-angled trapezoidal stainless steel plate is welded to the fixed base plate (6).

5. The device for wave dissipation in lakes according to claim 1, characterized in that: The fixed base plate (6) is a special-shaped 304 stainless steel plate with evenly arranged end plate holes (61) on the edge.

6. The device for wave dissipation in lakes according to claim 2, characterized in that: The center-to-center distance between adjacent drainage holes (4) in the horizontal and vertical directions is 40mm, and the center distance between the bottom drainage hole (4) and the fixed base plate (6) is 110-140mm.

7. The device for lake wave reduction according to claim 4, characterized in that: The upper bottom width of rib 1 (5) and rib 2 (7) is less than half the lower bottom width, and the lower bottom width is less than half the height.

8. The device for wave dissipation in lakes according to claim 1, characterized in that: Both wave damping plate 1 (2) and wave damping plate 2 (3) are made of 304 stainless steel and their height is the same as that of the middle rib (1).

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