Anti-scour structure of cofferdam for river regulation
By installing anti-collision plates, support frames, buffer components and guide plates around the cofferdam, the problem of traditional cofferdams being easily damaged under high flow conditions is solved, the risk of cofferdam damage is reduced, and the project safety and progress are improved.
Patent Information
- Application Number
- CN202423059134.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-11
AI Technical Summary
Traditional cofferdams are easily damaged by water flow under high flow velocity and complex geological conditions, resulting in problems such as displacement or collapse, which affect the progress and safety of the project.
The system uses structures such as anti-collision plates, support frames, fixed components, buffer components and guide plates. The anti-collision plates bear the impact of water flow, the buffer components absorb energy, the guide plates disperse the water flow, and the support frames provide supporting force to reduce the risk of cofferdam damage.
Effectively reduce the possibility of cofferdam being damaged by water impact, extend its service life, and improve project safety and progress.
Smart Images
Figure CN223481872U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of cofferdams, and in particular to an anti-scour structure for cofferdams used in river management. Background Technology
[0002] In river management and water conservancy projects, cofferdams are a common temporary water-retaining structure used to isolate the construction area from the water flow and ensure construction safety. Traditional cofferdams are mostly made of earth and rock, which can meet construction needs to a certain extent. However, under high flow velocity and complex geological conditions, they are easily damaged by water flow impact, thus affecting the progress and safety of the project.
[0003] Therefore, more robust cofferdam types such as sheet pile cofferdams and concrete cofferdams have been introduced. The appropriate cofferdam type is selected based on the river management period and the river flow conditions. Sheet pile cofferdams are often used for river management projects with shorter construction periods. However, during use, cofferdams are highly susceptible to displacement and even collapse due to water flow impact, thus requiring further improvements. Utility Model Content
[0004] This application provides an anti-scour structure for cofferdams used in river management, which is a reinforcement structure proposed to address the problem of damage to cofferdams.
[0005] This application provides a cofferdam anti-scour structure for river channel management, which adopts the following technical solution:
[0006] An anti-scour structure for a cofferdam used in river management includes an anti-scour plate disposed around the perimeter of the cofferdam, a support frame for supporting the anti-scour plate, and a fixing component for installing the anti-scour plate onto the support frame. The ends of the anti-scour plate are provided with a plurality of protrusions.
[0007] By adopting the above technical solution, and by setting up anti-scouring plates to protect the outside of the cofferdam, the main role of which is to bear the impact of water flow, thereby reducing the impact on the cofferdam and reducing the possibility of damage, displacement or even collapse of the cofferdam due to water flow impact. By setting up several protrusions to increase the frictional resistance between the cofferdam and the water flow, the impact force of the water flow is further dispersed, thereby reducing the impact of water flow.
[0008] Preferably, it further includes a buffer assembly for cushioning the scour shield when it is subjected to water flow impact, the buffer assembly including an elastic pad disposed on the scour shield away from the surface of the cofferdam.
[0009] By adopting the above technical solution and by setting up a buffer component, specifically including an elastic pad, the elastic pad absorbs some of the energy when water flows, thereby reducing the pressure on the anti-impact plate and extending the service life of the anti-impact structure.
[0010] Preferably, the buffer assembly further includes a spring disposed between the elastic pad and the anti-impact plate, and the spring is provided at intervals along the height direction of the anti-impact plate.
[0011] By adopting the above technical solution, the elasticity of the spring itself is used to further absorb energy from the impact of the water flow.
[0012] Preferably, the support frame includes several columns inserted into the riverbed soil and crossbeams set between two adjacent columns, and the fixing assembly includes a second bolt passing through the anti-scouring plate and threadedly connected to the crossbeam.
[0013] By adopting the above technical solution, the anti-impact plate is threaded onto the crossbeam using a second bolt, thereby installing the anti-impact plate onto the support frame.
[0014] Preferably, the support frame further includes a diagonal brace disposed between the crossbeam and the cofferdam, one end of the diagonal brace being connected to the crossbeam and the other end of the diagonal brace being inserted into the riverbed soil.
[0015] By adopting the above technical solution and by setting diagonal braces, the support force of the anti-scour plate is further improved, thereby increasing the water flow impact force that the anti-scour plate can withstand and extending the service life of the anti-scour structure.
[0016] Preferably, at least two anti-scouring plates are provided corresponding to the water-facing side and the side facing the water. Each anti-scouring plate has a snap-fit plate protruding from its end face that is close to each other. The snap-fit plate snaps onto a connecting plate. A telescopic plate is provided between the two connecting plates. The snap-fit plate and the connecting plate have through holes along their own thickness direction. The through holes are waist-shaped. The snap-fit plate has a third bolt passing through the through hole. The third bolt is threaded onto a second nut.
[0017] By adopting the above technical solution, and by setting anti-scour plates on both the water-facing and side-facing surfaces, the overall installation speed can be reduced by setting too many plates, and the anti-scour capacity of the anti-scour plates can be maximized. Since water flow inclined towards the anti-scour plates may cause relative displacement of the anti-scour plates, and since the anti-scour plates set on the water-facing and side-facing surfaces have different length directions, snap-fit plates, connecting plates, and telescopic plates are set to connect the two anti-scour plates, thereby connecting and restraining the two anti-scour plates and reducing the possibility of relative slippage when the anti-scour plates are impacted by water flow.
[0018] Preferably, a guide plate is provided on the surface of the anti-scour plate away from the cofferdam. The guide plate includes a guide section on the water-facing side and a diversion section for guiding the water flow away from the anti-scour plate.
[0019] By adopting the above technical solution, a guide plate is provided, and the guide part on the water-facing side is used to guide the water flow. The guide part guides the water flow rushing towards the anti-scour plate in a direction away from the anti-scour plate, so as to counteract the water flow that will subsequently impact the anti-scour plate, thereby dispersing the impact of the water flow flowing onto the anti-scour plate.
[0020] Preferably, a buffer pad is provided between the drainage part and the anti-impact plate.
[0021] By adopting the above technical solution, since the water flow direction may be different, a portion of the water flow will impact the guide section. A buffer pad is provided to absorb the energy of the water flow impact on the end of the guide section away from the anti-impact plate.
[0022] In summary, this utility model has the following beneficial effects:
[0023] 1. By installing anti-scouring plates, the outer side of the cofferdam is protected, which mainly bears the impact of water flow, thereby reducing the impact on the cofferdam and reducing the possibility of damage, displacement or even collapse of the cofferdam due to water flow impact.
[0024] 2. By incorporating a buffer component, some energy is absorbed when water flows, thereby reducing the pressure on the anti-impact plate and extending the service life of the anti-impact structure.
[0025] 3. By setting a guide plate, the guide part on the water-facing side is used to guide the water flow. The guide part guides the water flow rushing towards the anti-scour plate in a direction away from the anti-scour plate, so as to counteract the water flow that will subsequently impact the anti-scour plate, thereby dispersing the impact of the water flow flowing onto the anti-scour plate. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;
[0027] Figure 2 yes Figure 1 A magnified view of part A in the middle;
[0028] Figure 3 This is a schematic diagram of the overall structure of Embodiment 1 of this application;
[0029] Figure 4 yes Figure 3 A magnified view of part B in the diagram.
[0030] Explanation of reference numerals in the attached drawings: 1. Cofferdam; 11. Telescopic steel plate; 12. Support beam; 121. Reinforcing rib; 2. Anti-collision plate; 21. Protrusion; 3. Support frame; 31. Column; 32. Crossbeam; 33. Diagonal brace; 4. Fixing component; 41. Second bolt; 42. Washer; 43. First nut; 5. Buffer component; 51. Elastic pad; 52. Spring; 6. Deflector plate; 61. Buffer pad; 7. Clip plate; 71. Connecting plate; 72. Telescopic plate; 721. Folding piece; 8. Perforation; 81. Third bolt; 82. Second nut. Detailed Implementation
[0031] The following is combined with Figure 1-4 This application will be described in further detail below.
[0032] This application discloses an anti-scouring structure for a cofferdam used in river management.
[0033] Example 1:
[0034] An anti-scour structure for cofferdams used in river management, referring to Figure 1 It includes an anti-scour plate 2 installed around the cofferdam 1, a support frame 3 for supporting the anti-scour plate 2, a fixing component 4 for installing the anti-scour plate 2 on the support frame 3, and a buffer component 5 for buffering the anti-scour plate 2 when it is impacted by water flow.
[0035] It should be noted that the example shown is a sheet pile cofferdam 1. This cofferdam 1 specifically includes several interlocking telescopic steel plates 11 and support beams 12 fixedly connected to the telescopic steel plates 11. The fixing between the telescopic steel plates and the support beams can be achieved by threading bolts through the telescopic steel plates 11 to the support beams 12, or by welding, depending on the requirements. The lower ends of the telescopic steel plates 11 are inserted into the riverbed soil. Four support beams 12 are provided and fixed to each other, with reinforcing ribs 121 fixedly connected between adjacent support beams 12.
[0036] The anti-scouring plate 2 is made of high-strength steel plate and is rectangular in shape. At least two anti-scouring plates 2 are provided on the water-facing side and the side facing the water, respectively. The length direction of the two anti-scouring plates 2 is parallel to the length direction of the support beam 12 provided on the corresponding water-facing side and the side facing the water. The ends of the anti-scouring plates 2 are provided with several protrusions 21, specifically provided on the surface of the two anti-scouring plates 2 that are close to each other and away from the cofferdam 1. It should be noted that the protrusions 21 can be elastic protrusions made of plastic or rubber, or they can be made of high-strength steel plate, depending on the requirements.
[0037] The support frame 3 includes several columns 31 inserted into the riverbed soil, crossbeams 32 set between two adjacent columns 31, and diagonal braces 33 set between the crossbeams 32 and the cofferdam 1. In this embodiment, corresponding to the anti-scour plate 2, there are at least three columns 31 and two crossbeams 32. The two crossbeams 32 are parallel to the length direction of the two anti-scour plates 2 respectively. Several diagonal braces 33 are set at intervals along the length direction of the crossbeams 32. One end of the diagonal brace 33 is fixedly connected to the crossbeam 32, and the other end of the diagonal brace 33 is inserted into the riverbed soil.
[0038] Reference Figure 1 , Figure 2 The fixing component 4 specifically includes a second bolt 41 that passes through the anti-impact plate 2, a washer 42 that is disposed on one side of the anti-impact plate 2, and a first nut 43 that is threaded to the second bolt 41. The washer 42 is provided to increase the friction between the anti-impact plate 2 and the crossbeam 32, thereby increasing the required connection strength.
[0039] The buffer assembly 5 includes an elastic pad 51 disposed on the surface of the anti-collision plate 2 away from the cofferdam 1, and a spring 52 disposed between the elastic pad 51 and the anti-collision plate 2. Several springs 52 are spaced apart along the height direction of the anti-collision plate 2. It should be noted that the buffer assembly 5 is disposed away from the protrusion 21.
[0040] The implementation principle of the anti-scour structure of a cofferdam for river management in this application embodiment is as follows: by setting up an anti-scour plate 2, the cofferdam 1 is protected and mainly bears the impact of water flow, thereby reducing the impact on the cofferdam 1 and reducing the possibility of damage, displacement or even collapse of the cofferdam 1 due to water flow impact. By setting up a number of protrusions 21, the frictional resistance between the cofferdam and the water flow is increased, thereby further dispersing the impact force of the water flow and reducing the impact of water flow.
[0041] Example 2:
[0042] Reference Figure 3 , Figure 4 The difference from Embodiment 1 is that a guide plate 6 is provided on the surface of the anti-scour plate 2 away from the cofferdam 1. The guide plate 6 is positioned away from the protrusion 21 and the buffer assembly 5, or it can be positioned between the two, or several of them can be provided in an alternating manner, or the protrusion 21 can be replaced, depending on the requirements. In this embodiment, the protrusion 21 is replaced by the guide plate 6. The guide plate 6 includes a guide section on the water-facing side and a diversion section for guiding the water flow away from the direction of the anti-scour plate 2. Furthermore, a buffer pad 61 is provided between the diversion section and the anti-scour plate 2.
[0043] Both anti-impact plates 2 have protruding snap-fit plates 7 on their adjacent end faces. The snap-fit plates 7 are L-shaped and snap-fit plates 7 are connected to connecting plates 71. Both the snap-fit plates 7 and the connecting plates 71 can be made of steel plates. A telescopic plate 72 is fixedly connected between the two connecting plates 71. The telescopic plate 72 specifically includes several foldable folding pieces 721, which can extend and retract under force. It should be noted that the telescopic plate 72 can be made of elastic foldable steel plates, silicone, or plastic, depending on the requirements.
[0044] The snap-fit plate 7 and the connecting plate 71 are provided with through holes 8 along their own thickness direction. The through holes 8 are waist-shaped. The snap-fit plate 7 is provided with a third bolt 81 passing through the through holes 8. The third bolt 81 is threaded with a second nut 82 to connect the snap-fit plate 7 and the connecting plate 71.
[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A cofferdam structure for river management to prevent erosion, characterized in that: It includes an anti-collision plate (2) set around the cofferdam (1), a support frame (3) for supporting the anti-collision plate (2), and a fixing component (4) for installing the anti-collision plate (2) on the support frame (3). The end of the anti-collision plate (2) is provided with a plurality of protrusions (21).
2. The scour prevention structure of a cofferdam for river management according to claim 1, characterized in that: It also includes a buffer assembly (5) for buffering the anti-scour plate (2) when it is subjected to water flow impact, the buffer assembly (5) including an elastic pad (51) disposed on the surface of the anti-scour plate (2) away from the cofferdam (1).
3. The scour prevention structure of a cofferdam for river management according to claim 2, characterized in that: The buffer assembly (5) further includes a spring (52) disposed between the elastic pad (51) and the anti-impact plate (2), and the spring (52) is provided at intervals along the height direction of the anti-impact plate (2).
4. The scour prevention structure of a cofferdam for river management according to claim 2, characterized in that: The support frame (3) includes several columns (31) inserted into the riverbed soil and crossbeams (32) set on two adjacent columns (31). The fixing component (4) includes a second bolt (41) that passes through the anti-scouring plate (2) and is threadedly connected to the crossbeam (32).
5. The scour prevention structure of a cofferdam for river management according to claim 4, characterized in that: The support frame (3) also includes a diagonal brace (33) disposed between the crossbeam (32) and the cofferdam (1), one end of the diagonal brace (33) being connected to the crossbeam (32) and the other end of the diagonal brace (33) being inserted into the riverbed soil.
6. The scour prevention structure of a cofferdam for river management according to claim 1, characterized in that: At least two anti-surge plates (2) are provided corresponding to the water-facing side and the side water-facing side. Each anti-surge plate (2) has a snap-fit plate (7) protruding from its end face that is close to each other. The snap-fit plate (7) is snapped with a connecting plate (71). A telescopic plate (72) is provided between the two connecting plates (71). The snap-fit plate (7) and the connecting plate (71) are provided with a through hole (8) along their own thickness direction. The through hole (8) is waist-shaped. The snap-fit plate (7) is provided with a third bolt (81) passing through the through hole (8). The third bolt (81) is threaded with a second nut (82).
7. The scour prevention structure of a cofferdam for river management according to claim 1, characterized in that: The anti-scouring plate (2) has a guide plate (6) on its surface away from the cofferdam (1). The guide plate (6) includes a guide section on the water-facing side and a diversion section for guiding the water flow away from the anti-scouring plate (2).
8. The erosion prevention structure of a cofferdam for river management according to claim 7, characterized in that: A buffer pad (61) is provided between the drainage part and the anti-impact plate (2).